13567817
Data Security in Service-Oriented Architectures
Due to standardized interfaces and loose coupling of services, serviceoriented architectures provide the possibility for close interaction between different organizations and communities. But this also introduces new risks: To have under control where which data is processed becomes increasingly difficult. This paper highlights that current approaches for ensuring data privacy and required security mechanisms are no longer adequate under these changing conditions and presents possible solutions discussed by researchers and developers. Additionally, economic implications of data privacy and security are considered.
14036610
Service-oriented support of cooperative workflows considerations for urban planning processes
Web-based information sources have evolved to an essential element in our daily and professional life. To process this faster and faster growing amount of information, web portals provide personalized access to specific information and communication services. In this paper, an example from urban planning is given. In this workflow, different actors are interacting in an ad-hoc manner. Therefore, a Portal Architecture has been built up, which provides the relevant information. This paper proposes a Service Orientated Architecture to provide access to business processes, software applications and hardware resources in a workflow oriented way.
16090986
Developing Web applications for mobile devices
Today, even small mobile devices access the Internet. Therewith, mobility issues have become an important technical and economic topic - not only in new but in proven and successful Web applications as well. The main problem derives from a growing development of heterogeneity in hardware and software of mobile devices. To overcome this problem, this paper presents a framework to develop Web applications for mobile devices. This framework issues important points when developing web application that also focuses on mobile users. This includes completely new developments, as well as development that issue an upgrade of existing Web applications to mobile devices. An important element in this framework is the employment of the fairly new CC/PP standard.
21797693
E-Gov-Risk-Board - Lebenszyklusorientierte Identifikation von Risiken bei E-Government-Anwendungen
11737906
A disk-based parallel implementation for direct condensation of large permutation modules
Through the use of a new disk-based method for enumerating very large orbits, condensation for orbits with tens of billions of elements can be performed. The algorithm is novel in that it offers efficient access to data using distributed disk-based data structures. This provides fast access to hundreds of gigabytes of data,which allows for computing without worrying about memory limitations.
 The new algorithm is demonstrated on one of the long-standing open problems in the Modular Atlas Project [11]: the Brauer tree of the principal 17-block the sporadic simple Fischer group Fi23 The tree is completed by computing three orbit counting matrices for the Fi23 orbit of size 11, 739, 046, 176 acting on vectors of dimension 728 over GF (2). The construction of these matrices requires 3-1/2 days on a cluster of 56 computers,and uses 8 GB of disk storage and 800 MB of memory per machine.
16200249
Collaborative Smart Items
Business information systems provide computer support for decision making across huge data sets. Smart Items are miniaturized computer and sensing systems embedded into physical goods, items and assets. This paper proposes collaborative Smart Items for pushing business relevant computing as close as possible into the real world. Collaboration is enabled through an auction-based negotiation mechanism running distributed between the Smart Items. This mechanism serves as an abstraction across Smart Items in order to enable a common reasoning on business critical contexts as they may occur in logistics, safety and highly dynamic planning scenarios. In this paper, we investigate auction-based collaboration for Smart Items and present first experimental results. We conclude that auctions facilitate reliable business information processing even under harsh industrial conditions such as information loss or device failure.
205705738
A lacunary version of Mergelian's approximation theorem
Let K be a compact plane set having connected complement. Then Mergelian's theorem states that the linear span of the monomials z^n, i.e. the polynomials, are dense in the Banach space A(K) of all functions continuous on K and holomorphic in the interior of K endowed with the sup-norm. We consider the question under which conditions the linear span of z^n, with n running through a sequence of nonnegative integers having upper density one, is dense in A(K) or appropriate subspaces.
9329311
Intersection Line Length Normalization in CT Projection Data
We present a method to improve the quality of common sinogram restoration algorithms, which are used for metal-artifact reduction in X-ray CT. The presented approach is based on the idea that the intersection length of all beams through the object of interest can approximately be calculated from a preliminary reconstruction of the object. Incorporating this information to the reconstruction allows significant reduction of streak artifacts. Additionally, it is shown that the information about intersection length may also be used to improve the detection of metal shadows within the sinogram.
8947989
Submission of content to a digital object repository using a configurable workflow system
The prototype of a workflow system for the submission of content to a digital object repository is here presented. It is based entirely on open-source standard components and features a service-oriented architecture. The front-end consists of Java Business Process Management (jBPM), Java Server Faces (JSF), and Java Server Pages (JSP). A Fedora Repository and a mySQL data base management system serve as a back-end. The communication between front-end and back-end uses a SOAP minimal binding stub. We describe the design principles and the construction of the prototype and discuss the possibilities and limitations of work ow creation by administrators. The code of the prototype is open-source and can be retrieved in the project escipub at this http URL