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Synthesized Polyphonic Music Database with Verifiable Ground Truth for Multiple F0 Estimation

To study and to evaluate a multiple F0 estimation algorithm, a polyphonic database with verifiable ground truth is necessary. Real recordings with manual annotation as ground truth are often used for evaluation. However, ambiguities arise during manual annotation, which are often set up by subjective judgements. Therefore, in order to have access to verifiable ground truth, we propose a systematic method for creating a polyphonicmusic database. Multiple monophonic tracks are rendered from a given MIDI file, in which rendered samples are separated to prevent overlaps and to facilitate automatic annotation. F0s can then be reliably extracted as ground truth, which are stored using SDIF.

ABSTRACTThis paper aims to develop, assess, and numerically implement analytical models for the newly introduced Quintuple Friction Pendulum Isolator (QFPI) which can identically capture its real e...

eng_Latn

Design of a music perception assessment system for mandarin-speaking cochlear implant users

The goal of the present study is to develop a Chinese-tailored experimental platform for music perception assessment of Chinese cochlear implant users.Music perception performance is assessed by using listening tasks and questionnaires.The listening task includes the pitch just noticeable difference test,the pitch-direction discrimination test and melody contour identification test.Five timbres and three frequency ranges are available for each test.Musical Background and Appreciation Questionnaire and Appreciation of Music Questionnaire are used to investigate the relationship between music perception and music experience of cochlear implant users before or after implantation.Three cochlear implant users and six normal hearing listeners have participated the system-verification test.The test results are consistent with the previous music perception studies.

This paper illustrates the origin,the aesthetic lingering charm and the cultural features of Song typeface in China.The song typeface not only has shown the calligraphy charm,but also has the lingering charm of printing and caving.It eventually has affected the generation people by its origin form and spirit characteristic.

eng_Latn

Current Advances in the Cognitive Neuroscience of Music

Investigating emotion with music: an fMRI study

Agent-Based Intelligent Interface for Wheelchair Movement Control

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Musical Parsing and Musical Affect

This paper explores the issue of what is going on in a listener9s mind during the real-time processing of music, such that it is possible to account for the listener9s understanding of the music. The issue will be approached through evidence internal to music itself, and also by analogy with evidence from the processing of language. I will then examine how processing of the sort I propose provides a basis for considering a particular issue in the theory of musical affect.

We focus on the problem of learning semantics from multimedia data associated with broadcast video documents. In this paper we propose to learn semantic concepts from multimodal sources based on style and context detectors, in combination with statistical classier ensembles. As a case study we present our method for detecting the concept of news subject monologues. This approach had the best average precision performance amongst 26 submissions in the 2003 video track of the Text Retrieval Conference benchmark. Experiments were conducted with respect to individual detector contribution, ensemble size, and ranking mechanism. It was found that the combination of detectors is decisive for the nal result, although some detectors might appear useless in isolation. Moreover, by using a probabilistic ranking, in combination with a large classier ensemble, results can be improved even further.

eng_Latn

A Novel Three-Stage Frequency Offset Estimator for OFDM

A novel frequency offset estimate method is proposed for OFDM systems. In the proposed method, a special preamble composed of two training symbol blocks with several wide-sense identical parts is designed. To obtain a large estimate range together with a good estimation performance, a novel three-stage CFO estimate scheme based on the designed preamble is proposed. In this scheme, initial CFO estimates are first obtained over the two training symbol blocks by means of a novel two-stage estimate method. In the third stage, the two initial CFO estimates are jointly used to enlarge the CFO estimate range. Simulation results demonstrate that the novel three-stage frequency offset estimator has a satisfying estimate performance while achieving a large estimate range and maintaining a low computational complexity

This paper presents a simple, but efficient and robust, method for music genre classification that utilizes sparse representations in overcomplete dictionaries. The training step involves creating dictionaries, using the K-SVD algorithm, in which data corresponding to a particular music genre has a sparse representation. In the classification step, the Orthogonal Matching Pursuit (OMP) algorithm is used to separate feature vectors that consist only of Linear Predictive Coding (LPC) coefficients. The paper analyses in detail a popular case study from the literature, the ISMIR 2004 database. Using the presented method, the correct classification percentage of the 6 music genres is 85.59, result that is comparable with the best results published so far.

eng_Latn

Speaker Linking and Applications using Non-Parametric Hashing Methods

Abstract : Large unstructured audio data sets have become ubiquitous and present a challenge for organization and search. One logical approach for structuring data is to find common speakers and link occurrences across different recordings. Prior approaches to this problem have focused on basic methodology for the linking task. In this paper, we introduce a novel trainable nonparametric hashing method for indexing large speaker recording data sets. This approach leads to tunable computational complexity methods for speaker linking. We focus on a scalable clustering method based on hashingcanopy-clustering. We apply this method to a large corpus of speaker recordings, demonstrate performance tradeoffs, and compare to other hashing methods.

We describe preliminary results from an effort to quantify the uncertainties in parton distribution functions and the resulting uncertainties in predicted physical quantities. The production cross section of the $W$ boson is given as a first example. Constraints due to the full data sets of the CTEQ global analysis are used in this study. Two complementary approaches, based on the Hessian and the Lagrange multiplier method respectively, are outlined. We discuss issues on obtaining meaningful uncertainty estimates that include the effect of correlated experimental systematic uncertainties and illustrate them with detailed calculations using one set of precision DIS data.

eng_Latn

Classification of music genres using sparse representations in overcomplete dictionaries

This paper presents a simple, but efficient and robust, method for music genre classification that utilizes sparse representations in overcomplete dictionaries. The training step involves creating dictionaries, using the K-SVD algorithm, in which data corresponding to a particular music genre has a sparse representation. In the classification step, the Orthogonal Matching Pursuit (OMP) algorithm is used to separate feature vectors that consist only of Linear Predictive Coding (LPC) coefficients. The paper analyses in detail a popular case study from the literature, the ISMIR 2004 database. Using the presented method, the correct classification percentage of the 6 music genres is 85.59, result that is comparable with the best results published so far.

Understanding the composition of the Internet traffic has many applications nowadays, mainly tracking bandwidth consuming applications, QoS-based traffic engineering and lawful interception of illegal traffic. Although many classification methods such as Support Vector Machines (SVM) have demonstrated their accuracy, not enough attention has been paid to the practical implementation of lightweight classifiers. In this paper, we consider the design of a real-time SVM classifier at many Gbps to allow online detection of categories of applications. Our solution is based on the design of a hardware accelerated SVM classifier on a FPGA board.

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An exhaustive review of automatic music transcription techniques: Survey of music transcription techniques

Separation of Singing Voice from Music

Lumbosacral spinal fusion. A biomechanical study.

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PITCH DETECTION ALGORITHM : AUTOCORRELATION METHOD AND AMDF

A comparative performance study of several pitch detection algorithms

Characterizing the position of CIO

yue_Hant

Machine learning research that matters for music creation: A case study

Motivations and Methodologies for Automation of the compositional process

Automatic Detection of Diabetes Diagnosis using Feature Weighted Support Vector Machines based on Mutual Information and Modified Cuckoo Search

eng_Latn

Applying Machine Learning and Audio Analysis Techniques to Insect Recognition in Intelligent Traps

A study of the behavior of several methods for balancing machine learning training data

VITON: An Image-Based Virtual Try-on Network

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PITCH DETECTION ALGORITHM : AUTOCORRELATION METHOD AND AMDF

A comparative performance study of several pitch detection algorithms

“They’re blowing up my phone”: Group Messaging Practices Among Adolescents

yue_Hant

web content mining techniques tools & algorithms – a comprehensive study .

Web mining: information and pattern discovery on the World Wide Web

A speech enhancement algorithm by iterating single- and multi-microphone processing and its application to robust ASR

eng_Latn

The Digital Music Lab: A Big Data Infrastructure for Digital Musicology

The similarity metric

Alcohol consumption, the metabolic syndrome and insulin resistance in 58-year-old clinically healthy men (AIR study).

kor_Hang

VT-AMDF, a pitch detection algorithm

PITCH DETECTION ALGORITHM : AUTOCORRELATION METHOD AND AMDF

A comparative performance study of several pitch detection algorithms

eng_Latn

Computational Approaches for the Understanding of Melody in Carnatic Music

A behavioral study of emotions in south indian classical music andits implications in music recommendation systems

Automatic collision avoidance using model-predictive online optimization

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Intangible cultural heritage preservation: An exploratory study of digitization of the historical literature of Chinese Kunqu opera librettos

Optical Music Recognition of Early Typographic Prints using Hidden Markov Models

SentimentAnalysis: ACombinedApproach

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Preparation and Characterization of Polystyrene Magnetic Microspheres via Microsuspention Polymerization Technique

In this study,Fe_3O_4 magnetic nanoparticles dispersed in nano-scale was modified by oleic acid,and thus could be well dispersed in styrene.Polystyrene magnetic microspheres were prepared in a well shaped spherical form with a size range of 15 to 25 μm by the microsuspension polymerization technique for use in the application of biological functional materials.Moreover,the polystyrene magnetic microspheres exhibit stronger magnetic property and superparamagnetism.The morphological,particle size/particle size distribution and magnetic properties of the microspheres were characterized and studied by SEM,IR and magnetometry.

At present, there is a lot of research for slope stability, the inherent reason of slope instability is geotechnical material will get plastic deformation under load. In this paper, Mohr- Coulomb yield condition is transformed strain expressed to stress expressed.Based on this, analysis the effects that geotechnical material parameters internal friction angle ,cohesion c and Poisson's ratio to Mohr- Coulomb yield condition and the development of soil plastic zone.In addition, using the strength reduction FEM simulating the change of plastic zone distribution caused by change of the geotechnical materials parameters .The results show that the internal friction angle , cohesion c are reducted, the plastic zone expand;Increasing the Poisson’s ratio , narrowing the slope’s plastic zone;Plastic zone’s different distribution is caused by different material parameters affect the yield surface.

eng_Latn

THE ULTRA STRUCTURE OF INSECT SURFACES BY SCANNING ELECTRON MICROSCOPY

A recent development in microscopy certain to be of great interest to entomologists is the Scanning Electron Microscope. This machine overcomes the difficulties of studying solid surfaces with a standard light microscope and the problems of the extremely small limits of penetration of the electron microscope. This new microscope focuses a stream of electrons into a beam as small as 1 μ in diameter which moves over the surface of the specimen in a regular pattern, causing secondary radiations to emerge from the surface of the specimen. These are collected by a very sensitive detector and converted to an image similar to that produced by a television tube.

Abstract In situ composites can be obtained either by unidirectional eutectic solidification or by unidirectional solid- state decomposition. Techniques in the latter category are dealt with in this review. The solid-state growth methods may be classified, according to the state of the starting material, into (a) eutectoid decomposition, (b) discontinuous precipitation, or (c) growth from the noncrystalline state. Common to the three processes is the duplex microstructure which occurs, permitting alignment during growth in a temperature gradient. The author reviews the theory of the transformation, the experimental techniques, and the empirical parameters which have been reported in the literature. Emphasis is placed upon the relationships between interphase spacing and growth rate, and upon the potential discrepancies between growth rate and pulling rate.

yue_Hant

Effects of sterilization and storage on the properties of ALP-grafted biomaterials for prosthetic and bone tissue engineering applications.

Grafting of the biomaterial surfaces with biomolecules is nowadays a challenging research field for prosthetic and bone tissue engineering applications. On the other hand, very few research works investigate the effect of the sterilization processes on the properties of functionalized biomaterials. In this study, the effects of different sterilization techniques (e.g. gamma and electron beam irradiation, ethylene oxide) on the enzymatic activity of bioactive glasses and Ti6Al4V grafted with alkaline phosphatase (ALP) have been analyzed. Sterility maintenance and in vitro bioactivity of the sterilized surfaces have also been investigated. Finally the effect of packaging and storage conditions has been considered.

Abstract In situ composites can be obtained either by unidirectional eutectic solidification or by unidirectional solid- state decomposition. Techniques in the latter category are dealt with in this review. The solid-state growth methods may be classified, according to the state of the starting material, into (a) eutectoid decomposition, (b) discontinuous precipitation, or (c) growth from the noncrystalline state. Common to the three processes is the duplex microstructure which occurs, permitting alignment during growth in a temperature gradient. The author reviews the theory of the transformation, the experimental techniques, and the empirical parameters which have been reported in the literature. Emphasis is placed upon the relationships between interphase spacing and growth rate, and upon the potential discrepancies between growth rate and pulling rate.

eng_Latn

Flexible strain sensor with high performance based on PANI/PDMS films

Abstract A high strain sensor composed of elastomer polydimethylsiloxane (PDMS) and polyaniline (PANI) was fabricated by electrodeposition method for PANI preparation and daubing method for PDMS preparation. This kind of sensor could subject to a large tensile strain (∼50%) and revealed a high gauge factor (54 at 50% strain), which was higher than other sensors reported previously. Also, the sensor displayed a current with a magnitude of mA when applied to 1 V, indicating it didn't need expensive and huge test equipment. Moreover, cyclic strain on the sensor obtained repeatable resistive responses. Its work mechanisms were discussed. The flexible sensor was proved to be useful in sensing strains and other various applications.

This paper presents an evaluation of the piezocone penetration test (PCPT) interpretation methods and the development of new correlation methods for reasonably estimating the consolidation parameters of cohesive soils, namely, the constrained modulus and overconsolidation ratio (OCR). Laboratory and in situ PCPT test data collected from seven sites in Louisiana were used in this study. Shelby tube samples were collected and used to evaluate the consolidation properties in a laboratory. Statistical analyses were conducted to evaluate the current interpretation methods and to explore new correlations. The results of this study showed that the PCPT data can be reasonably implemented to calculate the constrained modulus and OCR of cohesive soils. Backcalculated constrained modulus and OCR parameters from field measurements are in close agreement with PCPT-derived values.

eng_Latn

Let R be a commutative, noetherian, local ring. Topological Q-vector spaces modelled on full subcategories of the derived category of R are constructed in order to study intersection multiplicities.

Let x~ be the image of X~ in R. The main object of this paper is to study modules of finite length and finite projective dimension over R. One consequence of our study will be counterexamples to several conjectures concerning the behavior of intersection multiplicities for modules of finite projective dimension. Let "/" denote length. If S is a Noetherian ring, M, N are finitely generated S-modules, l(M| ) is finite, and d=pdsM<~, we may define, following Serre IS] d Zs(M, N)= z(M, N) = ~ ( 1)'/(TorS(M, N)).

In the conventional approach to quantum mechanics, indeterminism is an axiom and nonlocality is a theorem. We consider inverting the logical order, making nonlocality an axiom and indeterminism a theorem. Nonlocal “superquantum” correlations, preserving relativistic causality, can violate the CHSH inequality more strongly than any quantum correlations.

eng_Latn

The order of speciality of an ample invertible sheaf L on a curve is the least integer m so that L ›m is nonspecial. There is a reasonable upper bound of the order of speciality for a simple invertible sheaf in terms of its degree and projective dimension. We study the case where it reaches the upper bound. Moreover we for- mulate Castelnuovo's genus bound involving the order of speciality.

The principal result of the present work consists in the proof that an intersection of quadrics passing through a canonical curve is a reduced variety. The possible cases when the intersection of quadrics does not coincide with the curve itself are also examined in this article. Figures: 1. Bibliography: 8 references.

It is proved that special flows over irrational rotations and under functions whose Fourier coefficients are of order O(1/| n |) are disjoint in the sense of Furstenberg from all mixing flows. This is an essential strengthening of a classical result by Kocergin on the absence of mixing of special flows built over irrational rotations and under bounded variation roof functions.

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There is considered the problem of describing up to linear conformal equivalence those harmonic cubic homogeneous polynomials for which the squared-norm of the Hessian is a nonzero multiple of the quadratic form defining the Euclidean metric. Solutions are constructed in all dimensions and solutions are classified in dimension at most $4$. Techniques are given for determining when two solutions are linearly conformally inequivalent.

Given a reductive algebraic group $G$ and a finite dimensional algebraic $G$-module $V$, we study how close is the algebra of $G$-invariant polynomials on $V^{\oplus n}$ to the subalgebra generated by polarizations of $G$-invariant polynomials on $V$. We address this problem in a more general setting of $G$-actions on arbitrary affine varieties.

Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.

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In this paper, we study the complex Landsberg spaces and some of their important subclasses. We introduce and characterize the class of generalized Berwald and complex Landsberg spaces. The intersection of these spaces gives the so called $G-$ Landsberg class.

In this paper we introduce in study the projectively related complex Finsler metrics. We prove the complex versions of the Rapcs\'{a}k's theorem and characterize the weakly K\"{a}hler and generalized Berwald projectively related complex Finsler metrics. The complex version of Hilbert's Fourth Problem is also pointed out. As an application, the projectiveness of a complex Randers metric is described.

Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.

eng_Latn

The purpose of this short note is to connect the two parts of the title, on one hand Clifford algebras and Clifford modules, on the other hand matrix factorizations of a non degenerate quadratic homogeneous polynomial. The main result states the category of Clifford modules is equivalent to a suitably defined category of Matrix factorizations of the quadratic polynomial. This shed a new light about the category of Clifford modules.

We define reflexive sheaves on a singular quadric Q that generalize the spinor bundles on smooth quadrics, using matrix factorizations of the equation of Q. We study the first properties of these spinor sheaves, give a Horrocks-type criterion, and show that they are semi-stable, and indeed stable in some cases.

The oxidative polymorphism of debrisoquine (DBQ) has been determined in 89 patients with colo-rectal cancer and in 556 normal control subjects. Four patients and 34 controls, with a metabolic ratio >12.6, were classified as poor metabolisers of DBQ (n.s.).

eng_Latn

Let X_g=C^{(2)}_g be the second symmetric product of a very general curve of genus g. We reduce the problem of describing the ample cone on X_g to a problem involving the Seshadri constant of a point on X_{g-1}. Using this we recover a result of Ciliberto-Kouvidakis that reduces finding the ample cone of X_g to the Nagata conjecture when g\ge 9. We also give new bounds on the the ample cone of X_g when g=5.

The aim of this note is to study local and global Seshadri constants for a family of smooth surfaces with prescribed polarization.

We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero.

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The introduction in physics of a finite geometry approximating the ordinary Euclidean one poses the problem of studying the relativity groups over such a geometry. We present a detailed analysis of the structure and irreducible representations of the rotation, Lorentz, and Poincare groups. It is found that, besides the usual quantum numbers, a new two‐valued label is necessary to specify the representations.

Finite Lorentz groups acting on four-dimensional vector spaces coordinatized by finite fields with a prime number of elements are represented as homomorphic images of countable, rational subgroups of the Lorentz group acting on real four-dimensional space-time. Bounded subsets of the real Lorentz group are retractable with arbitrary precision to finite subsets of such rational subgroups. These finite retracts correspond, via local isomorphisms, to well-behaved subsets of Lorentz groups over finite fields. This establishes a relationship of approximation between the real Lorentz group and Lorentz groups over very large finite fields.

This is a brief overview of researches of Dmitry Petrovich Zhelobenko (1934--2006). He is the best known for his book"Compact Lie groups and their representations"and for the classification of all irreducible representations of complex semisimple Lie groups. We tell also on other his works, especially on the spectral analysis of representations.

eng_Latn

Asymptotic regularity of powers of ideals of points in a weighted projective plane

In this paper we study the asymptotic behavior of the regularity of symbolic powers of ideals of points in a weighted projective plane. By a result of Cutkosky, Ein and Lazarsfeld, regularity of such powers behaves asymptotically like a linear function. We study the difference between regularity of such powers and this linear function. Under some conditions, we prove that this difference is bounded, or eventually periodic. As a corollary we show that, if there exists a negative curve, then the regularity of symbolic powers of a monomial space curve is eventually a periodic linear function. We give a criterion for the validity of Nagata's conjecture in terms of the lack of existence of negative curves.

This paper considers the problem of tuning natural frequencies of a linear system by a memoryless controller. Using algebro-geometric methods it is shown how it is possible to improve current sufficiency conditions.The main result is an exact combinatorial characterization of the nilpotency index of the $\bmod 2$ cohomology ring of the real Grassmannian. Using this characterization, new sufficiency results for generic pole assignment for the linear system with m-inputs, p-outputs, and McMillan degree n are given. Among other results it is shown that \[2.25 \cdot \max (m,p) + \min (m,p) - 3 \geq n\] is a sufficient condition for generic real pole placement, provided $\min (m,p) \geq 4$.

eng_Latn

Bicuspid aortic valve with right‐sided aortic arch aneurysm and Kommerell's diverticulum

Bicuspid aortic valve (BAV) is a common congenital cardiac malformation, frequently combined with ascending aorta dilation. However, isolated abnormalities of the aortic arch are less frequent in BAV patients. Here, we present a rare case of BAV combined with right-sided aortic arch aneurysm, aberrant left subclavian artery, and Kommerell's diverticulum, diagnosed by echocardiography and computed tomography angiography. The patient was followed-up regularly because of the life-threatening risks of aortic arch aneurysms.

Berglund-H\"ubsch duality is an example of mirror symmetry between orbifold Landau-Ginzburg models. In this paper we study a D-module-theoretic variant of Borisov's proof of Berglund-H\"ubsch duality. In the $p$-adic case, the D-module approach makes it possible to endow the orbifold chiral rings with the action of a non-trivial Frobenius endomorphism. Our main result is that the Frobenius endomorphism commutes with Berglund-H\"ubsch duality up to an explicit diagonal operator.

eng_Latn

Extrema of Hartree—Fock-type functionals

Abstract We introduce and investigate Hartree—Fock-type functionals—a generalization of Hartree—Fock functionals, which are widely used in the study of many-fermion systems.

In this article we exhibit some balls lying in the quasi-Fuchsian space of once punctured tori, which are maximal in the class of balls with the same centers. The centers of our maximal balls lie on the slice determined by the trace equation y = ¯ x.

eng_Latn

Operator Relations, Dynamical Systems, and Representations of a Class of Wick Algebras

We consider families of operators satisfying a general class of relations, whose solutions can be described in terms of orbits of some dynamical system acting on the spectrum of a commuting sub-family. In the first section we introduce a class of relations and show, how the representations of such relations are related to orbits of the corresponding dynamical system. Also, we discuss the problem of accurate sense of the relation for unbounded operators. In Section 2, we study the class of *-algebras allowing Wick ordering whose representations can be studied by using methods of Section 1. We classify such Wick *-algebras, and discuss their representations.

Abstract Kim et al. (Appl. Math. Inf. Sci. 9(6):1-6, 2015) consider the q -extensions of Boole polynomials. In this paper, we consider Witt-type formula for the q -Boole polynomials with weights and derive some new interesting identities and properties of those polynomials and numbers from the Witt-type formula which are related to special polynomials and numbers.

eng_Latn

L2-torsion invariants and homology growth of a torus bundle over S1

We introduced an infinite sequence of L 2 -torsion invariants for surface bundles over the circle in [4]. In this note, we investigate in detail the first two terms for a torus bundle case. In particular, we show that the first invariant can be described by the asymptotic behavior of the order of the first homology group of a cyclic covering.

We give a brief introduction to the study of the algebraic structures -- and their geometrical interpretations -- which arise in the BRST construction of a conformal string background. Starting from the chiral algebra $\cA$ of a string background, we consider a number of elementary but universal operations on the chiral algebra. From these operations we deduce a certain fundamental odd Poisson structure, known as a Gerstenhaber algebra, on the BRST cohomology of $\cA$. For the 2D string background, the correponding G-algebra can be partially described in term of a geometrical G-algebra of the affine plane $\bC^2$. This paper will appear in the proceedings of {\it Strings 95}.

eng_Latn

Modèle minimal équivariant et formalité

We study the rational equivariant homotopy type of a topological space X equipped with an action of the group of integers modulo n . For n = pk (p prime, k a positive integer), we build an algebraic model which gives the rational equivariant homotopy type of X. The homotopical fixed-point set appears in the construction of a model of the fixed-points set. In general, this model is different from G. Triantafillou's model [Ti]. For n = p (p prime), we then give a notion of equivariant formality. We prove that this notion is equivalent to the formalizability of the inclusion of fixed-points set i: XzP -X. Examples and counterexamples of Zp-formal spaces are given.

Soit P un cone normal de l'espace de Banach reel E. On note par N la constante normale de P. On considere le probleme aux deux points limites: −x″=f(t, x), t∈I, x(0)=x(1)=θ ou I=[0,1] et f une application continue de I×P dans P. On etudie l'existence de solutions positives multiples

fra_Latn

Risk factors for upper adjacent segment degeneration after multi-level posterior lumbar spinal fusion surgery

Background ::: Posterior lumbar spinal fusion has been widely used in degenerative lumbar stenosis, but adjacent segment degeneration (ASD) was common. Researchers have found many risk factors for ASD after one or two levels of surgery, but few clinical studies focused on multi-level surgery. The purpose of this study was to clarify risk factors for upper ASD after multi-level posterior lumbar spinal fusion.

The aim of this note is to construct sequences of vector bundles with unbounded rank and discriminant on an arbitrary algebraic surface. This problem, on principally polarized abelian varieties with cyclic Neron-Severi group generated by the polarization, was considered by Nakashima in connection with the Douglas-Reinbacher-Yau conjecture on the Strong Bogomolov Inequality. In particular we show that on any surface, the Strong Bogomolov Inequality $SBI_l$ is false for all $l>4$.

eng_Latn

Habitat heterogeneity in the pseudometallophyte Arabidopsis halleri and its structuring effect on natural variation of zinc and cadmium hyperaccumulation

Background and aims ::: Arabidopsis halleri is a pseudometallophyte plant model hyperaccumulating zinc and cadmium. This study investigates which abiotic parameters may cause phenotypic divergence among accessions for hyperaccumulation traits.

In this paper,we mainly introduce the definitions and properties about the generalized d-cluster categories and the generalized d-cluster tilting algebras of hereditary algebras and the corresponding Galois covering results.we also show the lemma given by Professor Peng and Professor Guo which is used to judge whether the Hall polynomials of finite dimensional algebras of representation-finite exist.Then we show the existence of Hall polynomials for representation-finite generalized d-cluster tilted algebras of ADE type using these covering results and the lemma.

eng_Latn

The supersingular locus of the Shimura variety for GU(1, s)

In this paper we study the supersingular locus of the reduction modulo p of the Shimura variety for GU(1,s) in the case of an inert prime p. Using Dieudonn\'e theory we define a stratification of the corresponding moduli space of p-divisible groups. We describe the incidence relation of this stratification in terms of the Bruhat-Tits building of a unitary group. ::: In the case of GU(1,2), we show that the supersingular locus is equi-dimensional of dimension 1 and is of complete intersection. We give an explicit description of the irreducible components and their intersection behaviour.

We give a brief introduction to the study of the algebraic structures -- and their geometrical interpretations -- which arise in the BRST construction of a conformal string background. Starting from the chiral algebra $\cA$ of a string background, we consider a number of elementary but universal operations on the chiral algebra. From these operations we deduce a certain fundamental odd Poisson structure, known as a Gerstenhaber algebra, on the BRST cohomology of $\cA$. For the 2D string background, the correponding G-algebra can be partially described in term of a geometrical G-algebra of the affine plane $\bC^2$. This paper will appear in the proceedings of {\it Strings 95}.

eng_Latn

$p$-adic Berglund-H\"ubsch Duality

Berglund-H\"ubsch duality is an example of mirror symmetry between orbifold Landau-Ginzburg models. In this paper we study a D-module-theoretic variant of Borisov's proof of Berglund-H\"ubsch duality. In the $p$-adic case, the D-module approach makes it possible to endow the orbifold chiral rings with the action of a non-trivial Frobenius endomorphism. Our main result is that the Frobenius endomorphism commutes with Berglund-H\"ubsch duality up to an explicit diagonal operator.

We study the following bifurcation problem in a bounded domain in IR N : 8 : pu = juj jvj v + f(x; u; v; ) in qv = juj jvj u + g(x; u; v; ) in (u; v) 2 W 1;p 0 () W 1;q 0 () : We prove that the principal eigenvalue 1 of the following eigen- value problem 8

eng_Latn

A completion for distributive nearlattices

The aim of this article is to propose an adequate completion for distributive nearlattices. We give a proof of the existence of such a completion through a representation theorem, which allows us to prove that this completion is a completely distributive algebraic lattice. We show several properties about this completion, and we present a connection with the free distributive lattice extension of a distributive nearlattice. Finally, we consider how can be extended n-ary operations on distributive nearlattices, and we study the basic properties of these extensions.

We prove global well-posedness and scattering for the defocusing, cubic NLS on $\mathbb{R}^3$ with initial data in $H^s(\mathbb{R}^3)$ for $s>49/74$. The proof combines the ideas of resonance decomposition in \cite{CKSTT4} and linear-nonlinear decomposition in \cite{ben1}\cite{roy} together with the idea of large time iteration.

eng_Latn

Chord routing algorithm based on limited multicasting

Chord is a successful routing algorithm,but the inconsistence between logistic routing and physical routing leads to a very big network delay if the node routing only relies on logistic distance and this will seriously affect the routing efficiency.A Chord routing algorithm based on limited network layer multicasting was proposed,which used multicast technology to obtain physical neighbor nodes and improved on original Chord routing algorithm.It can shorten network search delay greatly,reduce routing hops effectively and improve the performance of routing.

We give a brief introduction to the study of the algebraic structures -- and their geometrical interpretations -- which arise in the BRST construction of a conformal string background. Starting from the chiral algebra $\cA$ of a string background, we consider a number of elementary but universal operations on the chiral algebra. From these operations we deduce a certain fundamental odd Poisson structure, known as a Gerstenhaber algebra, on the BRST cohomology of $\cA$. For the 2D string background, the correponding G-algebra can be partially described in term of a geometrical G-algebra of the affine plane $\bC^2$. This paper will appear in the proceedings of {\it Strings 95}.

eng_Latn

Purely quantum superadditivity of classical capacities of quantum multiple access channels.

We are studying classical capacities of quantum memoryless multiaccess channels in geometric terms and we are revealing a break of additivity of the Holevo-like capacity. This effect is a purely quantum mechanical one, since, as we point out, the capacity regions of all classical memoryless multiaccess channels are additive. It is the first such effect revealed in the field of classical information transmission via quantum channels.

This paper surveys bocses, quasi-hereditary algebras and their relationship which was established in a recent result by Koenig, Ovsienko, and the author. Particular emphasis is placed on applications of this result to the representation type of the category filtered by standard modules for a quasi-hereditary algebra. In this direction, joint work with Thiel is presented showing that the subcategory of modules filtered by Weyl modules for tame Schur algebras is of finite representation type. The paper also includes a new proof for the classification of quasi-hereditary algebras with two simple modules, a result originally obtained by Membrillo-Hern\'andez.

eng_Latn

On certain loci of Hankel r-Planes of ℙ m

We study the loci of Hankel (l + 1)-planes in ℙm containing a fixed l-plane πl. We investigate the singular locus of the variety H(r,m) of Hankel r-planes in ℙm.

Let X and Y be two inflnite dimensional real or complex Banach spaces. In this note we determine the forms of surjective additive maps ` : L(X) ! L(Y ) preserving the kernel's dimension or the range's codimension. As consequence, we establish that ` : L(X) ! L(X) preserves the kernel (respectively, the range) if and only if there exists an invertible operator A 2 L(X) such that `(T) = AT (respectively, `(T) = TA) for all T 2 L(X).

eng_Latn

New series in the Johnson cokernels of the mapping class groups of surfaces

In the present paper, we study the Sp-module structure of the cokernel of the Johnson homomorphism of the mapping class groups of surfaces. We detect the Sp-irreducible components with highest weight [1^k] (and [k]) in the cokernel. We also show that the multiplicities of them is equal to one.

We present the Penrose limits of a complex marginal deformation of $AdS_5\times S^5$, which incorporates the $SL(2,\mathbb{R})$ symmetry of type IIB theory, along the $(J,0,0)$ geodesic and along the $(J,J,J)$ geodesic. We discuss giant gravitons on the deformed $(J,0,0)$ pp-wave background.

eng_Latn

A sufficiency analysis of asymptotic stability in continuous recombinant fermentation with auxotrophic mutants

Abstract Fermentations employing genetically modified microorganisms are sensitive to the disturbances likely in large bioreactors. Since these disturbances may affect the competition between recombinant cells and plasmid-free cells, with consequent effects on plasmid stability and reactor stability, it is useful to identify regions of asymptotic stability (RAS) which do not vary with shifts in the operating condition. Using a model for continuous fermentation with auxotrophic mutants, sufficient conditions have been derived for such operationally invariant RAS. Plots for Saccharomyces cerevisiae containing the pBR322 plasmid show that improving the segregational stability makes the fermentation more vulnerable to disturbances. Thus, real reactor operation must balance both kinds of stability.

In this paper we study the multivariate ANOVA decomposition for $1$-periodic functions on the torus. In particular we use the integral projection operator that leads to the classical ANOVA decomposition. Relationships between the Fourier coefficients of the function and its ANOVA terms lead to special frequency index sets and give an understanding of the decomposition working in the frequency domain. Moreover, we consider the truncated ANOVA decomposition and provide error bounds for approximation in $\mathrm{L}_\infty$ and $\mathrm{L}_2$. We present an approximation method based on the truncated decomposition with regard to a superposition dimension $d_s$.

eng_Latn

Solution Theory, Variational Formulations, and Functional A Posteriori Error Estimates for General First Order Systems with Applications to Electro-Magneto-Statics and More

AbstractWe prove a comprehensive solution theory using tools from functional analysis, show corresponding variational formulations, and present functional a posteriori error estimates for general l...

We study the rational equivariant homotopy type of a topological space X equipped with an action of the group of integers modulo n . For n = pk (p prime, k a positive integer), we build an algebraic model which gives the rational equivariant homotopy type of X. The homotopical fixed-point set appears in the construction of a model of the fixed-points set. In general, this model is different from G. Triantafillou's model [Ti]. For n = p (p prime), we then give a notion of equivariant formality. We prove that this notion is equivalent to the formalizability of the inclusion of fixed-points set i: XzP -X. Examples and counterexamples of Zp-formal spaces are given.

eng_Latn

A simplified Koch multiband fractal array using windowing and quantization techniques

The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands.

We give a brief introduction to the study of the algebraic structures -- and their geometrical interpretations -- which arise in the BRST construction of a conformal string background. Starting from the chiral algebra $\cA$ of a string background, we consider a number of elementary but universal operations on the chiral algebra. From these operations we deduce a certain fundamental odd Poisson structure, known as a Gerstenhaber algebra, on the BRST cohomology of $\cA$. For the 2D string background, the correponding G-algebra can be partially described in term of a geometrical G-algebra of the affine plane $\bC^2$. This paper will appear in the proceedings of {\it Strings 95}.

eng_Latn

Diverticulosis and diverticular disease (reference to a case of diverticular disease observed in 3 sisters)

We started from this frequent and important intestinal pathology to emphasize the above mentioned observation of three cases where it was possible to apply three different medico-surgical techniques with excellent results.

Berglund-H\"ubsch duality is an example of mirror symmetry between orbifold Landau-Ginzburg models. In this paper we study a D-module-theoretic variant of Borisov's proof of Berglund-H\"ubsch duality. In the $p$-adic case, the D-module approach makes it possible to endow the orbifold chiral rings with the action of a non-trivial Frobenius endomorphism. Our main result is that the Frobenius endomorphism commutes with Berglund-H\"ubsch duality up to an explicit diagonal operator.

eng_Latn

Schottky groups acting on homogeneous rational manifolds

We systematically study Schottky group actions on homogeneous rational manifolds and find two new families besides those given by Nori's well-known construction. This yields new examples of non-K\"ahler compact complex manifolds having free fundamental groups. We then investigate their analytic and geometric invariants such as the Kodaira and algebraic dimension, the Picard group and the deformation theory, thus extending results due to L\'arusson and to Seade and Verjovsky. As a byproduct, we see that the Schottky construction allows to recover examples of equivariant compactifications of SL(2,C)/\Gamma for \Gamma a discrete free loxodromic subgroup of SL(2,C), previously obtained by A. Guillot.

Abstract In this paper, we use the Rothe time-discretization method to prove the existence and uniqueness of a strong solution of a semilinear pseudo-parabolic equation with integral conditions. We also provided an example to illustrate the main result.

eng_Latn

Prüfer conditions in the Nagata ring and the Serre’s conjecture ring

ABSTRACTThe Nagata ring R(X) and the Serre’s conjecture ring R⟨X⟩ are two localizations of the polynomial ring R[X] at the polynomials of unit content and at the monic polynomials, respectively. In this paper, we contribute to the study of Prufer conditions in R(X) and R⟨X⟩. In particular, we solve the four open questions posed by Glaz and Schwarz in Section 8 of their survey paper [38] related to the transfer of Prufer conditions to these two constructions.

䅢stract. We prove, under some general assumptions, that a generator of any uniformly bounded Nemytskij operator, mapping a subset of space of functions of bounded variation in the sense of Wiener-Young into another space of this type, must be an affine function with respect to the second variable.

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Moduli stacks of Serre stable representations in tilting theory

Abstract We introduce a new moduli stack, called the Serre stable moduli stack, which corresponds to studying families of point objects in an abelian category with a Serre functor. This allows us in particular, to re-interpret the classical derived equivalence between most concealed-canonical algebras and weighted projective lines by showing they are induced by the universal sheaf on the Serre stable moduli stack. We explain why the method works by showing that the Serre stable moduli stack is the tautological moduli problem that allows one to recover certain nice stacks such as weighted projective lines from their moduli of sheaves. As a result, this new stack should be of interest in both representation theory and algebraic geometry.

The paper has an investigation on the tensor products of semireal modules.The following result is obtained:The tensor product M_RN of R-modules M,N possesses an ordering if and only if X(M|R)∩X(N|R)≠ or P(M)∩P(N)≠.Furthermore,Theorem 5 is obtained when modules considered are finitely generated.

eng_Latn

Covering radii are not matroid invariants

We show by example that the covering radius of a binary linear code is not generally determined by the Tutte polynomial of the matroid. This answers Problem 361 (P.J. Cameron (Ed.), Research problems, Discrete Math. 231 (2001) 469-478). e Tutte polynomial of the matroid. This answers Problem 361 (P.J. Cameron (Ed.), Research problems, Discrete Math. 231 (2001) 469-478).

The spaces of configurations of non-$k$-overlapping discs have been studied as a bimodule over the little discs operad. In fact, the spaces form a filtered operad. We define and study the induced structure on the homology.

eng_Latn

The rationality of Stark-Heegner points over genus fields of real quadratic fields

We study the algebraicity of Stark-Heegner points on a modular elliptic curve E. These objects are /?-adic points on E given by the values of certain /?-adic integrals, but they are conjecturally defined over ring class fields of a real quadratic field K. The present article gives some evidence for this algebraicity conjecture by showing that linear combinations of Stark-Heegner points weighted by certain genus characters of K are defined over the predicted quadratic extensions of K. The non- vanishing of these combinations is also related to the appropriate twisted Hasse-Weil L-series of E over K, in the spirit of the Gross-Zagier formula for classical Heegner points.

This paper considers a method to realize a two-valued input three-valued output function f:{0, 1}/sup n//spl rarr/{0, 1, 2} by using a cascade of four-input cells. Decomposition of a group function is used to find a canonical form. We show that the Walsh spectrum specifies the canonical form, and the number of non-zero coefficients in the spectrum is proportional to the number of cells in the cascade. Finally, we show a design algorithm for a p-valued function f:{0, 1}/sup n//spl rarr/{0, 1, ..., p-1}. The designed cascades are reversible and conservative.

eng_Latn

The odd–even invariant of an oriented matroid

This paper introduces the "odd-even invariant" of an oriented matroid. This is a nonnegative integer associated with the oriented matroid which does not change upon reorientation of the oriented matroid. As is shown here, it is also invariant under duality. Additional results are obtained, for uniform oriented matroids.

In the present paper, we study the Sp-module structure of the cokernel of the Johnson homomorphism of the mapping class groups of surfaces. We detect the Sp-irreducible components with highest weight [1^k] (and [k]) in the cokernel. We also show that the multiplicities of them is equal to one.

eng_Latn

Perfect Derived Categories of Positively Graded DG Algebras

We investigate the perfect derived category dgPer(A) of a positively graded differential graded (dg) algebra A whose degree zero part is a dg subalgebra and semisimple as a ring. We introduce an equivalent subcategory of dgPer(A) whose objects are easy to describe, define a t-structure on dgPer(A) and study its heart. We show that dgPer(A) is a Krull-Remak-Schmidt category. Then we consider the heart in the case that A is a Koszul ring with differential zero satisfying some finiteness conditions.

This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Discrete and Continuous Dynamical Systems - Series A following peer review. The definitive publisher-authenticated version 2015, 35(3), pp. 1009-1037 is available online at: http://dx.doi.org/10.3934/dcds.2015.35.1009

eng_Latn

On the generation of discrete and topological Kac–Moody groups

Abstract This article shows that discrete or topological Kac–Moody groups defined over finite fields are in many cases 2-generated. We provide explicit bounds on the minimal number of generators for arbitrary Kac–Moody groups.

The spaces of configurations of non-$k$-overlapping discs have been studied as a bimodule over the little discs operad. In fact, the spaces form a filtered operad. We define and study the induced structure on the homology.

eng_Latn

Equation-regular sets and the Fox-Kleitman conjecture

Abstract Given k ≥ 1 , the Fox–Kleitman conjecture from 2006 states that there exists a nonzero integer b such that the 2 k -variable linear Diophantine equation ∑ i = 1 k ( x i − y i ) = b is ( 2 k − 1 ) -regular. This is best possible, since Fox and Kleitman showed that for all b ≥ 1 , this equation is not 2 k -regular. While the conjecture has recently been settled for all k ≥ 2 , here we focus on the case k = 3 and determine the degree of regularity of the corresponding equation for all b ≥ 1 . In particular, this independently confirms the conjecture for k = 3 . We also briefly discuss the case k = 4 .

We consider families of operators satisfying a general class of relations, whose solutions can be described in terms of orbits of some dynamical system acting on the spectrum of a commuting sub-family. In the first section we introduce a class of relations and show, how the representations of such relations are related to orbits of the corresponding dynamical system. Also, we discuss the problem of accurate sense of the relation for unbounded operators. In Section 2, we study the class of *-algebras allowing Wick ordering whose representations can be studied by using methods of Section 1. We classify such Wick *-algebras, and discuss their representations.

eng_Latn

Imprimitivity theorems for weakly proper actions of locally compact groups

In a recent paper the authors introduced universal and exotic generalized fixed-point algebras for weakly proper group actions on C*-algebras. Here we extend the notion of weakly proper actions to actions on Hilbert modules. As a result we obtain several imprimitivity theorems establishing important Morita equivalences between universal, reduced, or exotic crossed products and appropriate universal, reduced, or exotic fixed-point algebras, respectively. In particular, we obtain an exotic version of Green's imprimitivity theorem and a very general version of the symmetric imprimitivity theorem by weakly proper actions of product groups GxH. In addition, we study functorial properties of generalized fixed-point algebras for equivariant categories of C*-algebras based on correspondences.

We study regularity properties of a positive measure in the euclidean space in terms of two square functions which are the multiplicative analogues of the usual martingale square function and of the Lusin area function of a harmonic function. The size of ...

eng_Latn

An improved initial codebook generating method-orthogonal increment splitting algorithm

This paper present a comparison of three main algorithms generating initial codebooks with reference to the convergence accuracy and speed. With both the elements considered, splitting methods are found to be more advantageous. Through a study of the common splitting method, an improved one-the orthogonal increment splitting algorithm is proposed. The new method can better utilize the symmetrical property of the speech or image sources, and endow the codewords of the initial codebook with a better distribution in the source space compared with the previous splitting method. The experimental results have confirmed the advantages of the new method, which can effectively eliminate the empty cells and non-typical codewords that may appear in the iteration process, thus achieving a better performance in both convergence speed and accuracy.

Let , where are integers, is some congruence subgroup of , and is a congruence-character of , be the space of all Siegel modular forms of genus , weight and character with respect to . In this paper, for a very broad class of congruence subgroups of , including all those previously investigated and practically all those groups encountered in applications, the author constructs a sufficiently large commutative ring of Hecke operators, acting on , a canonical decomposition (*)and a canonical inner product on . It is shown that the Hecke operators preserve the canonical decomposition (*) and that they are normal with respect to the canonical inner product .Bibliography: 17 titles.

eng_Latn

On the weak order ideal associated to linear codes

In this work we study a weak order ideal associated with the coset leaders of a non-binary linear code. This set allows the incrementally computation of the coset leaders and the definitions of the set of leader codewords. This set of codewords has some nice properties related to the monotonicity of the weight compatible order on the generalized support of a vector in \(\mathbb {F}_q^n\) which allows to describe a test set, a trial set and the set of zero neighbours of a linear code in terms of the leader codewords.

In the present paper, we study the Sp-module structure of the cokernel of the Johnson homomorphism of the mapping class groups of surfaces. We detect the Sp-irreducible components with highest weight [1^k] (and [k]) in the cokernel. We also show that the multiplicities of them is equal to one.

eng_Latn

Uniformly resolvable decompositions of $K_v$ into $P_3$ and $K_3$ graphs

In this paper we consider the uniformly resolvable decompositions of the complete graph KvKv, or the complete graph minus a 1-factor as appropriate, into subgraphs such that each resolution class contains only blocks isomorphic to the same graph. We completely determine the spectrum for the case in which all the resolution classes consist of either P3P3s or K3K3s.

We consider families of operators satisfying a general class of relations, whose solutions can be described in terms of orbits of some dynamical system acting on the spectrum of a commuting sub-family. In the first section we introduce a class of relations and show, how the representations of such relations are related to orbits of the corresponding dynamical system. Also, we discuss the problem of accurate sense of the relation for unbounded operators. In Section 2, we study the class of *-algebras allowing Wick ordering whose representations can be studied by using methods of Section 1. We classify such Wick *-algebras, and discuss their representations.

eng_Latn

Completable nilpotent Lie algebra

THE theory of nilpotent Lie algebra is very important in the theory of finite-dimensional Lie al-gebras. Because of its extraordinary complexity, one usually studies various classes of specialnilpotent Lie algebras. In the study of complete Lie algebras, a class of special nilpotent Lie al-gebras (called completable nilpotent Lie algebras) was discovered. In this letter, we will study

We continue the study of bottom-up unranked tree automata with equality and ::: disequality constraints between direct subtrees. In particular, we show that ::: the emptiness problem for the nondeterministic automata is decidable. In ::: addition, we show that the universality problem, in contrast, is undecidable.

eng_Latn

Combining Static and Dynamic Models for Traffic Signal Optimization Inherent Load-dependent Travel Times in a Cyclically Time-expanded Network Model

Travel times in traffic models are of great interest for developing realistic solutions for traffic assignment and traffic signal coordination in urban traffic networks. In this paper, a cyclically time-expanded network is presented for this purpose, which is a static and linear model from its structure. However, it provides enough dynamics to reproduce load-dependent travel times and it is capable of modelling traffic signals. Thus, this traffic flow model is at the cutting-edge of static and dynamic models, and furthermore, it allows the simultaneous optimization of traffic assignment and signal coordination with exact mathematical programming techniques. The authors study the inherent properties of travel times in this model and demonstrate its capabilities by simulation results obtained with state-of-the-art simulation tools.

In this paper we treat multistate systems under the same setting as the one of F. Ohi and T. Nishida [14], i.e., all the state spaces of components and the system are not necessarily the same. Definitions of series and parallel systems are introduced and existence theorems for such systems are given. Furthermore, it is shown that the preservation of IFR-stochastic property determines a multistate system as a series system. This fact is proved by using the concept of hazard transform of which definition has been presented by F. Ohi and T. Nishida [14].

eng_Latn

Bottleneck Routing Games with Low Price of Anarchy

Approximating Congestion + Dilation in Networks via "Quality of Routing” Games

Increasing online shop revenues with web scraping: a case study for the wine sector

eng_Latn

Adaptive Sampling Measurement for High Speed Network Traffic Flow

The characteristic of network traffic volume is a crucial guidance for the network capacity of transferring online, and also a key parameter for network efficient and planning. Unfortunately, it is more difficult to measure full traffic trace with the advent of high speed network, so the investigation of traffic sampling measure becomes the focus of the study of high speed network traffic measurement. This paper analysis and study on sampling measurement technology, and then introduces an adaptive sampling measurement in detail. It is an improvement over fixed granularity systematic sampling. In course of measurement, the adaptive sampling algorithm adjusts the sampling granularity according to the packet arrival interval automatically. In this way, the adaptive sampling is much more accurate and economical than the static sampling method.

This paper proposes an integrated solution, which based on probability routing, using multi-domain path selection, multi-domain path negotiation and intra-domain QoS-based routing algorithm, to provide multi-QoS based (such as bandwidth and hops) multi-domain circuit provision in a few minutes. This method has been used in the SFS for Shanghai Telecom.

eng_Latn

Frequency Analysis of Functionally Graded Curved Pipes Conveying Fluid

The curved pipe made of functionally graded material conveying fluid is considered and the in-plane free vibration frequency of the resulting composite pipe is investigated. The material properties are assumed to distribute continuously along the pipe wall thickness according to a power law and the effective mass, flexural rigidity, and mass ratio are used in the governing equations. The natural frequencies are derived numerically by applying the modified inextensible theory. The lowest four natural frequencies are studied via the complex mode method, the validity of which is demonstrated by comparing the results with those in available literatures. A parametric sensitivity study is conducted by numerical examples and the results obtained reveal the significant effects of material distribution gradient index, flow velocity, fluid density, and opening angle on the natural frequencies of the FGM curved pipes conveying fluid.

We consider some routing criterions for connections with QoS requirements in the Internet, which support QoS guarantees for both the services and networks. First we investigate the path consumption, and give the definition of the path consumption function (PCF). Then we observe the path selection's influence on the link residual bandwidth, we find that letting the narrowband connection choose those links with small residual bandwidth can increase the admission probability of the broadband ones. We define the bandwidth fragmentation function (BFF) for connections which reflects this influence. After that we give the definition of the network efficiency function (NEF) for the network performance measure. A QoS routing scheme and some simulation results are given. We conclude with a summary and with directions for future work.

eng_Latn

Packet Aggregation in TelosB WSNs: Design, Implementation and Experiments

Master's thesis in Information- and communication technology IKT590 - University of Agder 2016

An approach for estimating the parameters of mixed Weibull distributions is presented. The problem is formulated as maximization of the likelihood function of the corresponding mixture model. For the solution of the optimization problem, Bare Bones Particle Swarm Optimization (BBPSO) algorithm is applied. Illustrative example for a case study using censored data are provided in order to show the suitability of the BBPSO algorithm for this kind of problem very common in lifetime modelling.

eng_Latn

Recovering guaranteed performance service connections from single and multiple faults

Fault recovery techniques must be reexamined in the light of the new guaranteed performance services that high-speed packet/cell switched networks will support. We investigate the rerouting of guaranteed performance service connections on the occurrence of link faults, focussing on the aspects of route selection and establishment in the network. In a previous investigation, we explored some components of rerouting in the presence of single link faults in the network. In this paper we study the behavior of our techniques in the presence of multiple link faults in the network. We also examine the technique of retries to improve the success of rerouting. Our schemes are simulated on a cross-section of network workloads, and compared using several performance criteria. We use our results to develop a new delayed retry technique, which performs well for all our performance criteria.

Abstract A layer of random defects in the simple cubic Ising model with nearest neighbor ferromagnetic interactions of strength J is considered. Using the real space renormalization group method we calculate defect free energy in the whole temperature range. Specifically, we analyze: the layer of diluted defects, the layer of spin-glass type defects, and the layer of mixed defects. The free energy is strongly dependent on the value of couplings between the defect and the bulk.

eng_Latn

Optimizing the profit of on-demand multimedia service via a server-dependent queuing system

This study presents a profit maximization model that adopts the number of requests for image or voice transferring services on a network as decision variables for when to switch a second server on and off based on the costs of using a second server and of users waiting. A Markovian queue with a number of servers depending upon queue length and finite capacity is discussed. The data of interarrival time and service times of requests are collected by observing a queuing system. An empirical Bayesian method is then applied to estimate the traffic intensity of the system, which denotes the need for host computers. The mean number of transfer requests in the system and the queue length of transfer requests are calculated as the characteristic values of the system.

Recently, a cost minimization method to determine the lot size for the EOQ/EPQ models with backorders was published. This method is based on the well-known arithmetic-geometric mean inequality. Although the cost minimization method is correct and interesting, it does not focus on deriving the backorders level. This paper proposes another simple approach. The proposed method finds both the lot size and the backorders level.

eng_Latn

On aggregation functions based on linguistically quantified propositions and finitely additive set functions

We study aggregation functions defined as convex combinations of the linguistically quantified propositions "at least k criteria are satisfied". Our approach is similar to the TOWA function in spirit but instead of using a maxitive measure we propose to rely on a real-valued finitely additive set function. This assumption leads to a new framework. However, it is combinatorial by nature and, in general, it produces functions with high computational costs. Therefore, we analyze some particular settings and introduce new aggregation functions which can alleviate the combinatorial burden thanks to several combinatorial identities. These methods have interesting features and in particular, some of them make it possible to set different types of relationships between criteria by allowing the use of different t-norms. The interest of our proposals is illustrated with a famous example which cannot be modeled by classical aggregation functions such as the Choquet integral.

We consider some routing criterions for connections with QoS requirements in the Internet, which support QoS guarantees for both the services and networks. First we investigate the path consumption, and give the definition of the path consumption function (PCF). Then we observe the path selection's influence on the link residual bandwidth, we find that letting the narrowband connection choose those links with small residual bandwidth can increase the admission probability of the broadband ones. We define the bandwidth fragmentation function (BFF) for connections which reflects this influence. After that we give the definition of the network efficiency function (NEF) for the network performance measure. A QoS routing scheme and some simulation results are given. We conclude with a summary and with directions for future work.

eng_Latn

Heterogeneous edge weights promote epidemic diffusion in weighted evolving networks

The impact that the heterogeneities of links’ weights have on epidemic diffusion in weighted networks has received much attention. Investigating how heterogeneous edge weights affect epidemic spread is helpful for disease control. In this paper, we study a Reed–Frost epidemic model in weighted evolving networks. Our results indicate that a higher heterogeneity of edge weights leads to higher epidemic prevalence and epidemic incidence at earlier stage of epidemic diffusion in weighted evolving networks. In addition, weighted evolving scale-free networks come with a higher epidemic prevalence and epidemic incidence than unweighted scale-free networks.

Abstract The paper is concerned with a reduced SIR model for migrant workers. By using differential inequality technique and a novel argument, we derive a set of conditions to ensure that the endemic equilibrium of the model is globally exponentially stable. The obtained results complement with some existing ones. We also use numerical simulations to demonstrate the theoretical results.

eng_Latn

GLOBAL COUPLING OF AN INTEREFACE PROBLEM IN AN ACTIVATIOR—INHIBITOR SYSTEM

An activatior-inhibitor reaction system with global coupling was intro-duced in [1],The authors showed that global coupling suppresses the breathing motion and enhances the propagation of the localized solution.The collision between two trav-eling waves for a sufficiently strong global coupling is discussed in [2].If the width of layers is infinitesimally thin,the equation of motion for a pair of the interfaces is derived.We shall study the dynamics of interfaces in the free boundary problem with global coupling and with a strong global coupling.

The authors develop expressions for predicting contention delay for wormhole-routed 2-D mesh multicomputers. The detrimental effect of contention caused by interference within jobs has led them to analyze two different kinds of communication contention. Starting contention occurs when a processor attempts to access the network at the first hop on its route from the source to destination. Intermediate contention has different characteristics, and is the contention facing a communication path as the message arrives at intermediate nodes on its path from its source to destination. They describe how their expressions are developed and relate them to the problem of evaluating interference within a job assigned to a multicomputer. >

yue_Hant

The impact of failure management on the stability of communication networks

In this work we deal with communication networks in which links may fail. We propose an adversarial model for describing the traffic pattern occurring in this type of faulty systems and study properties concerning their stability, especially under (nontrivial) underloaded worse-case scenarios. We show that, depending on how the system is organized and prepared to deal with failures, the dynamics of the system change and thus the conditions for stability. We propose three different ways of failure management and study how they influence on the stability of faulty communication networks under the adversarial model proposed. We show that some failure managements can provoke the instability of even very simple networks.

The structure of GMA is introduced. Static displacement-force model and magnetism-machine coupling model for helping understand the magnetostriction and establishes simulation model are given. Simulation result shows that response time of machine part is slowness. It brings some disbennifit affection if minish damp. For example,exceed quantity and undulation will argument. It is important to ameliorate dynamic characteristic of the system to append a reasonable adjustor.

eng_Latn

Mathematical studies on a transaction's waits and deadlocks in a 2pl environment

The “straw man” analysis is based on the assumption that the accessible unit and locking unit are both a record occurrence (or a tuple); consequently the results cannot be applied when a locking unit is a large granule such as an area, a file, an index (or a data) block. In this study, the probabilities of a transaction's waits and deadlocks are derived when the accessible unit is a data object and the locking unit is a granule. The results can be used to explain a transaction's wait and deadlock situations for (1) various sizes of a granule and (2) different distributions of data objects accessed by a transaction. To determine the degree of consistency between a theoretical result and an experimental test, a simulation model is set, and the experimental results are nearly consistent with the probabilistic model.

Consider a randomized load balancing problem consisting of a large number n of server sites each equipped with K servers. Under the greedy policy, clients randomly probe a site to check whether there is still a server available. If not, d -- 1 other sites are probed and the task is assigned to the site with the fewest number of busy servers. If all the servers are also busy in each of these d -- 1 sites, the task is lost. This short paper analyzes a set of policies, i.e., (L, d) policies, that will occasionally probe additional sites even when there is still a server available at the site that was probed first. Using mean field methods, we show that these policies, that preventively probe other sites, can achieve the same loss probability while requiring a lower overall probe rate.

eng_Latn

Stability of adaptive congestion controls in packet networks

Abstract Some congestion controls used in packet networks are static, while others are adaptive, i.e., they respond on the basis of estimated load determined from measurements. Adaptive controls pose a potential stability problem. If the network reacts too strongly to overload, its load level may oscillate widely. In this paper, we examine the effect of offered overload and measurement error on the response of the network. We also study the effect of smoothing measurements. The model requires non-zero time to respond after a measurement of the load is taken. Results include conditions for convergence to a desired load, rate of convergence, and variance of system load as time goes to infinity as a function of system parameters.

We discuss recent findings about properties of quantum nonequilibrium steady states. In particular we focus on transport properties. It is shown that the time dependent density matrix renormalization method can be used successfully to find a stationary solution of Lindblad master equation. Furthermore, for a specific model an exact solution is presented.

eng_Latn

Distributed Lag Behaviour in the Housing Market: Some Further Evidence

This article is a study of the distributed lag relationship between completions and starts of private dwellings in the UK and extends some results previously published in this journal. The main finding confirms that a proper study of builders' behaviour, as manifested in the distributed lag relationship between completions and starts, must allow for both disequilibrium effects and time varying lag structures. However, in examining the economic variables that modified builders' behaviour (and hence the lag structure) it was found that both the rate of house price inflation and the level of building society mortgage advances had an important influence. An increase in both caused builders, in the expectation of easier sales, to quicken their rates of completion. Additional plausible influences — like the level of construction activity in the public sector were, however, not supported by the data.

Consider a randomized load balancing problem consisting of a large number n of server sites each equipped with K servers. Under the greedy policy, clients randomly probe a site to check whether there is still a server available. If not, d -- 1 other sites are probed and the task is assigned to the site with the fewest number of busy servers. If all the servers are also busy in each of these d -- 1 sites, the task is lost. This short paper analyzes a set of policies, i.e., (L, d) policies, that will occasionally probe additional sites even when there is still a server available at the site that was probed first. Using mean field methods, we show that these policies, that preventively probe other sites, can achieve the same loss probability while requiring a lower overall probe rate.

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Toward accurate modeling of the IEEE 802.11e EDCA under finite load and error-prone channel

In this paper we study the performance of IEEE 802.11e enhanced distributed channel access (EDCA) priority schemes under finite load and error-prone channel. We introduce a multi-dimensional Markov Chain model that includes all the mandatory differentiation mechanisms of the standard: QoS parameters, CWMIN, CWMAX arbitration inter-frame space (AIFS), and the virtual collision handler. The model faithfully represents the functionality of the EDCA access mechanisms, including lesser known details of the standard such as the management of the backoff counter which is technically different from the one used in the legacy DCF. We study the priority schemes under both finite load and saturation conditions. Our analysis also takes into consideration channel conditions.

A file sharing system based on Windows CE embedded platform have been realizes.The author optimized the system according to the characteristics of the specific embedded platform and proposed two kinds of optimization.The problem of slow-speed I/O operation in the embedded platform is solved by efficient utilization of the memory resource.And the problem of limited Socket numbers is solved by improving the queue algorithm.Test results show that the performances of the system have been effectively improved by using these two optimization methods.And the downloading speed of files is enhanced in the improved system.

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Friedel Oscillations in Carbon Nanotube Quantum Dots and Superlattices

Interface states of all-metallic carbon nanotube quantum dots and superlattices are studied within a tight-binding model. We focus on achiral systems made by connecting armchair (n, n) and zigzag (2n, 0) tubes with a full ring of n pentagon-heptagon topological defects. We show that the coupling between interface states, which arise from the topological defects, reflects the existence of the Friedel oscillations in the (n, n) tube, with an unusually large decay exponent. We expect this interaction to be important for the understanding of other physical properties, such as selective dot growth, magnetic interaction through carbon tubes or optical spectroscopy of interface states.

Abstract In this paper, a simplified congestion control model is considered to study the quasiperiodic motion induced by heterogenous time delays. Analysis for the stability of the equilibrium shows that the Hopf bifurcation curves with diverse frequencies may intersect at the so-called non-resonant double Hopf bifurcation point. Choosing the delays as the bifurcation parameters and employing the method of multiple scales, the amplitude–frequency equations or normal form equations are obtained theoretically. Based on these equations, the dynamics near the bifurcation point is classified. The values of the delays for which the quasiperiodic motion exists can be predicted with an acceptable accuracy. This result provides a reference in designing and optimizing the network systems.

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A New Analytic Method for IEEE 802.11 Distributed Coordination Function

In this paper, we consider a network of N identical IEEE 802.11 DCF (Distributed Coordination Function) terminals with RTS/CTS mechanism, each of which is assumed to be saturated. For performance analysis, we propose a simple and efficient mathematical model to derive the statistical characteristics of the network such as the inter-transmission time of packets in the network and the service time (the inter-transmission time of successful packet transmissions) of the network. Numerical results and simulations are provided to validate the accuracy of our model and to study the performance of the IEEE 802.11 DCF network.

The Flosolver MklB has two nodes, each having four processing elements based on intel's 8086/8087 chips. In each node one of the processor acts as the host. The internade communication is done through the parallel ports available on the hosts. Within a node the cynchronisation and inter processor communication is done through the global memory. As a sample case the flow part NACA 0012 aerofoil at zero incident using transonic small perturbation equation is computed and an efficiency of 90 percent is obtained.

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A study on peer startup process and initial offset placement in P2P live streaming systems

Coolstreaming/donet: A data-driven overlay network for peer-to-peer live media streaming

P2Cast: peer-to-peer patching scheme for VoD service

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Network monitoring using traffic dispersion graphs (tdgs)

Profiling internet backbone traffic: behavior models and applications

Comparative study of MPPT algorithms under variable resistive load

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What are the traditional forms of living employed by Tuvaluans?

Banking services are provided by the National Bank of Tuvalu. Public sector workers make up about 65% of those formally employed. Remittances from Tuvaluans living in Australia and New Zealand, and remittances from Tuvaluan sailors employed on overseas ships are important sources of income for Tuvaluans. Approximately 15% of adult males work as seamen on foreign-flagged merchant ships. Agriculture in Tuvalu is focused on coconut trees and growing pulaka in large pits of composted soil below the water table. Tuvaluans are otherwise involved in traditional subsistence agriculture and fishing.

In other cases, such as New Zealand and Canada, treaties allowed native peoples to maintain a minimum amount of autonomy. In the case of indigenous Australians, unlike with the Māori of New Zealand, no treaty was ever entered into with the indigenous peoples entitling the Europeans to land ownership, under the doctrine of terra nullius (later overturned by Mabo v Queensland, establishing the concept of native title well after colonization was already a fait accompli). Such treaties between colonizers and indigenous peoples are an important part of political discourse in the late 20th and early 21st century, the treaties being discussed have international standing as has been stated in a treaty study by the UN.

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What were native peoples able to maintain a minimum amount of through treaties?

In other cases, such as New Zealand and Canada, treaties allowed native peoples to maintain a minimum amount of autonomy. In the case of indigenous Australians, unlike with the Māori of New Zealand, no treaty was ever entered into with the indigenous peoples entitling the Europeans to land ownership, under the doctrine of terra nullius (later overturned by Mabo v Queensland, establishing the concept of native title well after colonization was already a fait accompli). Such treaties between colonizers and indigenous peoples are an important part of political discourse in the late 20th and early 21st century, the treaties being discussed have international standing as has been stated in a treaty study by the UN.

Most hunter-gatherers are nomadic or semi-nomadic and live in temporary settlements. Mobile communities typically construct shelters using impermanent building materials, or they may use natural rock shelters, where they are available.

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When did the Act of "Nihil novi nisi commune consensu" happen?

On 3 May 1505 King Alexander I Jagiellon granted the Act of "Nihil novi nisi commune consensu" (Latin: "I accept nothing new except by common consent"). This forbade the king to pass any new law without the consent of the representatives of the nobility, in Sejm and Senat assembled, and thus greatly strengthened the nobility's political position. Basically, this act transferred legislative power from the king to the Sejm. This date commonly marks the beginning of the First Rzeczpospolita, the period of a szlachta-run "Commonwealth".

In other cases, such as New Zealand and Canada, treaties allowed native peoples to maintain a minimum amount of autonomy. In the case of indigenous Australians, unlike with the Māori of New Zealand, no treaty was ever entered into with the indigenous peoples entitling the Europeans to land ownership, under the doctrine of terra nullius (later overturned by Mabo v Queensland, establishing the concept of native title well after colonization was already a fait accompli). Such treaties between colonizers and indigenous peoples are an important part of political discourse in the late 20th and early 21st century, the treaties being discussed have international standing as has been stated in a treaty study by the UN.

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what is the difference between refugees and migrants

Refugee FAQs What is the difference between a refugee and a migrant? A migrant is a person who makes a conscious choice to leave their country to seek a better life elsewhere. Before they decide to leave their country, migrants can seek information about their new home, study the language and explore employment opportunities. They can plan their travel, take their belongings with them and say goodbye to the important people in their lives.

Refugees are “invited” to live in the United States to start a new life. Immigrants. Immigrants generally come to the U.S. for one of two reasons: they are joining family members who already live in this country; or. they are “economic immigrants” seeking work and a better life for themselves and their families

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Triangulating the Effects of Interfixation in the Processing of German Compounds

The German language shows a high degree of compounding. The process is very productive in the language and compounds may be formed from the combination of four or more roots. In addition, German compounding also shows the presence of interfixes between constituents in about 35% of all compounds. We report on a compound composition experiment that investigates the role of these interfixes in on-line compound processing. The study reveals that interfixation carries with it a processing cost in German and that this processing cost is elevated in cases in which the interfix attaches to a truncated form of the initial compound constituent. Moreover, we find that response times are increased when initial compound constituents show inconsistent interfixation patterns across the language. These results support the view that German compounds are represented in terms of their constituents and that interfixation choices are made on-line.

After pointing out some essential difficulties in binocular stereo vision systems, we proposedthen a trinocular stereo vision method matching the feature primitives in 3-D space by use of pyramidalgraph.This method is based on the 3-D perspective projection geometry and needs no prior constraints or im-age similarities,so it can solve better the contradiction between the accuracy and matching difflculty. And theuse of pyramidal graph can speed up the matching process also. The experimental result for artirlcial imagesshows that the ratio Of false targets is almost zero,and the matching speed and accuracy is higher.

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Comparative analysis of sinogram interpolation methods for computer tomographic images

In this paper, we propose a limited-view computer tomography(CT) image reconstruction method that reduces the scan times and X-ray dosages in the semiconductor industry. To reduce streak artifacts, which are caused by an insufficient number of views, we study the sinogram interpolation method based on the average pixel value. The change patterns are tracked by iteratively averaging the values. We use a shepp-logan phantom to evaluate the effectiveness of the comparative interpolation method. The results showed that the streak artifacts were reduced in the proposed interpolation method. In addition, we compared our method with another interpolation method using the peak-signal-to-noise ratio(PSNR) and performance time.

The need for improving the capability to detect illegal or hazardous activities and yet reducing the workload of operators involved in various surveillance tasks calls for research on more capable automatic tools. To maximize their performance, these tools should be able to combine automatic capturing of normal behavior from data with domain knowledge in the form of human descriptions. In a proposed Joint Statistical and Symbolic Anomaly Detection System, statistical and symbolic methods are tightly integrated in order to detect the majority of critical events in the situation while minimizing unwanted alerts. We exemplify the proposed system in the domain of maritime surveillance.

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The Impact of Time-shift Estimation and Correction on Two 4D Attributes - Amplitude Difference and Velocity Change

4D seismic data can provide valuable insights to the reservoir and non-reservoir interpretation. Seismic attributes like amplitude difference and velocity change are commonly used to perform such task. All these attributes are computed after correlating monitor and base datasets, where time-shifts are observed. The technique responsible to correlate monitor and base amplitudes is called warping. In this study we apply the warping technique defined in Hale (2009) to the Norne field benchmark case. We investigate how uncertainties related to the choice of parameters used in Hale’s method impact on the time-shifts computation and in two 4D seismic derived attributes: amplitude difference and velocity change. We show that the time-shifts computation and the amplitude difference after time-shift correction are robust when considering different parameter values, while the results of velocity change are affected by the parameter choice.

In this paper, we suggested AdBoost algorithm for further improvising the performance of system. In the enhanced adaboost, the eigen vectors are computed for facial region & applied classification. In the process of classification, we opt for process of learning, training & testing. As observed from the result sessions in the previous paper [13] the outcomes from the reboost detection are observed. They provide the results in the form of Detection rate & false alarm rate. We applied the suggested methodology & improvising the performance of false alarm rate & detection rate. We have raised the rate of detection & false alarm rate. For presenting the contrasts, we have designed GUI window where comparisons are presented.

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INSERT: Efficient Sorting of Images on Mobile Devices

We amass increasing amounts of photos on our mobile devices, primarily captured by built-in cameras. These cameras provide precious opportunities to preserve memories or serve for creative engagement. However, creating order over these vast photo collections gets more difficult as we create more and more photos and this puts these valuable resources at risk. People fail to sort their photo collections manually and automated algorithms are not yet able to identify and group images based on the features that are most relevant to the human beholder. For these reasons we present INSERT, a novel mobile phone application for supporting manual sorting of photo collections in an efficient fashion. A user study featuring 21 participants showed that the proposed interaction mechanisms were well perceived and that there is yet much research to be conducted aiming at the management of image collections on mobile device, in particular with small screens.

In this paper, we present a high speed and large capacity NAND flash memory-based storage module after comprehensive comparison of different storage devices. The hardware platform proposed in this paper is designed under parallel architecture, on which the software design based. In the software design, we adopt ping-pong operation and pipeline technology to enhance the module's performance. Moreover, we will analyze the module's access speed, storage capacity and scalability in the performance analysis.

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Protein phosphorylation and signal transduction.

It is now generally accepted that protein phosphorylation-dephosphorylation has a role in the regulation of essentially all cellular functions. Thus, it is of interest that this process is involved in signal transduction. Nonetheless, the extent to which protein phosphorylation participates in signaling is truly remarkable. Almost every known signaling pathway eventually impinges on a protein kinase, or in some instances, a protein phosphatase. The diversity of these enzymes is noteworthy, and it is of interest that many biotechnology companies are eyeing them as potentially important targets for drugs. Such drugs may have important therapeutic applications, and in any event, they certainly will be useful to investigators who study signal transduction. Indeed, this already has been proven to be true.

In this paper, we present a robust approach of automatic detection and recognition of road signs in national roads, starting from the images resulting from a video stream taken by a camera embarked on a vehicle. Our approach is composed of three main phases: the first phase is to extract video stream images containing a circle or a triangle. This extraction is performed respectively by Hough transformation and Ramer-Douglas-Peucker filter, the second phase consists of extraction areas of the calculated image, in the previous phase. In the third and last phase, we proceed to a matching of the extracted image areas with signs of reference by comparison of interest points extracted by the SURF method and the matching method FLANN.

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Distinguishing Different Strategies of Across-Dimension

Selective attention in multidimensional displays has usually been examined using search tasks requiring the detection of a single target. We examined the ability to perceive a spatial structure in multi-item subsets of a display that were defined either conjunctively or disjunctively. Observers saw two adjacent displays and indicated whether the to-be-selected items within the two displays matched in terms of their spatial structure (the identity of the corresponding items within these subsets was not relevant to the task). The observers in our study could readily perceive conjunctively defined subsets, but had great difficulty with disjunctively defined subsets. The results pose a challenge to the popular idea that attention is guided by a “priority map” that sums bottom-up and top-down factors, whereas they are directly predicted by Boolean map theory of visual attention.

In this paper, aimed at the neutron transport equations of eigenvalue problem under 2-D cylindrical geometry on unstructured grid, the discrete scheme of Sn discrete ordinate and discontinuous finite is built, and the parallel computation for the scheme is realized on MPI systems. Numerical experiments indicate that the designed parallel algorithm can reach perfect speedup, it has good practicality and scalability.

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Sea Ice Detection From SAR Images of the Liaodong Bay Based on Texture Analysis

Texture analysis and study of ENVISAT ASAR sea ice imagery for the Liaodong Bay are carried out using gray level co-occurrence matrices(GLCM).In the analysis process,the effects given to the sea ice textural features by the parameters such as the GLCM orientation,the displacement,and the quantified gray level are studied in order to determine the values of the GLCM parameters and to represent the textu-ral features,which are suitable for the sea ice detection of the Liaodong Bay.Then the BP neural network classification method is used to derive an approach for sea ice detection from SAR images of the Liaodong Bay.Finally the results of this texture analysis are compared with those of the MODIS imagery and the TM imagery to verify the reliability of this method.

This text collects ten saliva wells' water of Muchengyi area in Dalian,mainly analyzing the wells of the area's water in the content of the chlorine ion,explaining that the area has already taken place the sea water invade the phenomenon.To use the kind of the groundwater of sea water invade to irrigate farmland,result in affect to the farmland soil and cause soil salinization.

kor_Hang

Accelerating computer vision algorithms using OpenCL framework on the mobile GPU - A case study

Realtime Computer Vision with OpenCV

Fast texture synthesis using tree-structured vector quantization

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General economic evaluation of the use of quaternary ammonium salts as catalysts in industrial applications

The use of quaternary ammonium salts (Quats) as phase-transfer catalysts is analyzed from a technological and economic point of view. The limiting price for Quats is determined by establishing a qualitative relationship between technical parameters and economic factors. Specific examples show that the present price of Quats limits their commercial use to the area of high-priced commodities and specialty chemicals. Quats may be used i commodity manufacture provided they are produced on a larger scale. A simulation of such a large-scale production of a representative Quat (tetrabutylammonium bromide) has been made and its consequences are discussed.

The generation and behavior of the fractal Koch array factor from a Kaiser window generator is studied. The main advantage of using Kaiser windows is that pattern parameters become much more flexible through altering the Kaiser window. The mainlobe width, current distribution, side-lobe ratio are now adjustable. Different reduced array structures can be obtained by using different threshold levels. Higher threshold values result in a highly reduced number of elements but they may highly distort the pattern and, hence, the multiband behavior. Finally, we study the effect of quantization of the feeding values. Quantization is necessary for implementation and simplification purposes. Several configurations of current distributions with the corresponding patterns are illustrated for different quantization levels. It is shown that moderate quantization keeps the same interesting similarity properties at several bands.

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Scale space and affine invariant recognition of occluded shapes

The recently proved existence of affine invariant scale spaces for shapes opens new possibilities for shape recognition. While affine invariant shape recognition is easily performed when shapes are complete, partially occluded or incomplete shapes must be recognized by dividing them into intrinsic parts. The characteristic point method, for instance, focuses on configurations of points with maximal curvature of the shape (in a euclidian invariant framework). Using the affine invariant scale space, we define affine invariant characteristic points and affine invariant parts of a shape. We prove that compatibility scale relations make feasible the matching of scale spaces and show experiments with noisy affine distorted and occluded shapes.

In practical use, objects in still images and videos are easy to misappropriate with handy image-processing tools and need to be pro- tected. However, the few proposals for object watermarking suffer from resynchronization problems. In this study, we develop an object-based watermarking method based on efficient segmentation using lines paral- lel and perpendicular to two principal axes in the spatial domain. A patch- like scheme is designed to embed and extract invisible watermarks. In contrast with the previous object-based watermarking schemes, extra information for resynchronization is not required to be stored in our method. Experimental results show the robustness of the proposed method against many kinds of geometrical attacks. © 2007 Society of Photo-

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A comparative study of hash based approximate nearest neighbor learning and its application in image retrieval

K-Means Hashing: An Affinity-Preserving Quantization Method for Learning Binary Compact Codes

peristomal moisture - associated skin damage in adults with fecal ostomies : a comprehensive review and consensus .

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Markov Random Fields (MRF) are a powerful and wide adopted tool in image processing. MRFS together with Bayesian Estimation Theory can be used for detecting edges of man made structures in Synthetic Aperture Radar images. In this paper we present a method developed in the Markovian-Bayesian framework which is particularly suited to work in case of high coherence SAR interferometric images pairs, such as TanDEM-X Mission data. A real case study, consisting of a pair of complex TerraSAR-X images, is presented, showing the performances of the algorithm.

A constant-false-alarm-rate (CFAR) edge detector based on the ratio between pixel values is described. The probability distribution of the image obtained by applying the edge detector is derived. Hence, the decision threshold can be theoretically determined for a given probability of false alarm as a function of the number of looks of the image under study and the size of the processing neighborhood. For a better and finer detection, the edge detector operates along the four usual directions over windows of increasing sizes. A test performed, for a given direction, on a radar image of an agricultural scene shows good agreement with the theoretical study. The operator is compared with the CFAR edge detectors suitable for radar images. >

Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.

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The paper presents the study of the effect of microwave radiation on dry soil. For this, five different soil samples were collected from various geographical regions of India. The waveguide cell method was employed for the determination of the storage factor ( e′) and the loss factor ( e″) of the soils. In this paper the methodology of measurement of dielectric constant for unexposed and exposed soils to microwave radiation is given and the results obtained are discussed.

The sections in this article are ::: ::: ::: 1 ::: Radiometers ::: ::: 2 ::: Radar Scattering ::: ::: 3 ::: Radar Scatterometers ::: ::: 4 ::: Radar Altimeters ::: ::: 5 ::: Ground-Penetrating Radars ::: ::: 6 ::: Imaging Radars ::: ::: 7 ::: Real-Aperture Radars ::: ::: 8 ::: Synthetic-Aperture Radars

A new identity is derived which relates the gain and the field distribution (or confinement factor) in a dielectric waveguide with complex refractive indices. This identity is valid for any guided mode of waveguides with an arbitrary cross section. It provides a new check of the accuracy of mode solvers. Also, it can be used in a variational approach to predict the gain or loss of a guided mode based on knowledge of confinement factors. It is shown that a previous analysis that is often used, is not correct. In addition, approximate expressions for the gain in slab waveguides are presented.

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In this study, we utilize the least squares formulation to solve the real-time buried object detection problem. Least squares estimation is used to estimate the next ground penetrating radar (GPR) signal from previous samples, where there is no underground object. If the measured GPR signal is considerably different than the estimated signal, presence of an underground object is concluded. In order to attain real-time performance, Cholesky factorization is used when solving the linear systems. The proposed approach is tested on an extensive data set of different surrogate mines and other objects that are commonly encountered under the ground. The data are collected from three different terrains with different soil types to reveal the true performance of the method. It is demonstrated that our approach achieves almost 100% performance with a false alarm rate of approximately 10% on real GPR data collected with a handheld GPR system.

A method of forming cooling ducts in the windings of a liquid cooled electrical transformer without adding permanent duct formers to the winding, and without requiring an additional manufacturing step to remove duct formers. Plastic tubes dissolvable in the liquid dielectric are utilized as the duct formers. Thermal siphon flow of the liquid through the tube openings when the transformer is energized dissolves the tubes and enlarges the cooling ducts to the outside dimensions of the tubes.

Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights.

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Numerical Study on Flow Angles and Mach Number Measurement Using the Surface Pressure of a Supersonic Aircraft with Nosecone

Numerical simulation on the Air Data Sensor System (ADS), which measures the flow angles and Mach number using the surface pressures on a nose cone, was conducted in this study. The effect of the half cone angle on the flow angle and Mach number measurement was investigated. As a result, we found that a large half cone angle achieves a high sensitivity at the flow angle measurement. It was also found that a small half cone angle achieves a high sensitivity at the Mach number measurement. To satisfy these conflicting requests, we proposed a new shape nose cone which has two different gradients. The high sensitivity was achieved at both the flow angle measurement and Mach number measurement by this new shape nose cone.

The database developed for the meteorological radar of Spino d'Adda in north Italy is presented as an example of automation in this field. The system has facilities for collection, retrieval, and modeling of radar images of rain as well as their components (individual patterns) and descriptors. The SPINO80-GRM software applies techniques of image analysis to radar rain data in order to identify and characterize the required data items (rain patterns) and then organizes them into a hierarchical, relational database. The component retrieval is based on a free combination of its attributes: some statistical investigations are also possible. >

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Multiwavelength Lidar Study of Fog.

Abstract : A study has been conducted to define quantitatively the range and accuracy of multispectral lidar techniques for remotely sensing the visibility and liquid water content of various types of fogs. The results indicate that the penetration of the lidar pulse into the fog is limited to a few hundred meters due to the severe attenuation of the pulse by the fog. Methods to obtain extinction, backscatter and total liquid water content are also discussed. (Author)

This report discusses research being conducted at Lawrence Livermore Laboratory under the following topics: prompt diagnostics; experimental modeling, design, and analysis; detector development; streak-camera data systems; weapons supporting research.

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