135455031
Iterative Service Orchestration based on Dependability Attributes
In a service-oriented architecture (SOA), the orchestration of services to new services and complex workflows is a common approach. Because the complexity and capability of the orchestrated services are increased, it is important to maintain and ensure the dependability attributes, e.g. availability and reliability, in such an environment. Today, most approaches focus on the needs during the creation of a single application, but the Internet became a commodity for end users during the last years and more services are available every day. While the range of available services is growing, the end users are helpless selecting a service providing the quality of service they expect. Therefore, a straightforward approach is needed allowing the creation and modification of orchestrated services by end users with respect to dependability attributes.
21797693
E-Gov-Risk-Board - Lebenszyklusorientierte Identifikation von Risiken bei E-Government-Anwendungen
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.
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.
44711307
Estimation of class membership functions for grey-level based image fusion
In this paper we propose a new unsupervised method for estimating class membership functions from statistical data. It combines in an original way information derived from the histogram as well as prior knowledge of the requirements that the functions must satisfy and that cannot be derived from the histogram. The method has been tested successfully on MR brain images, and applications to image fusion are illustrated.
18116843
Service lifecycle management infrastructure for smart items
Smart items are physical objects that are enhanced by information technology. There are a number of different smart item technologies available, all of which have different capabilities, protocols, and management functionality. These devices have become an attractive solution for enterprise scenarios. In such scenarios lifecycle management can become a challenge when considering the differences of the smart item types while at the same time providing an abstraction for common functionality. We propose an infrastructure for service lifecycle management of smart items. It is part of a middleware called Smart Item Services Infrastructure (SI)2, which is able to provide a uniform access to various smart item types. The presented architecture addresses the platform heterogenity challenge with a separation of platform-specific and platform-independent functionality. Service Lifecycle Managers for the individual platforms translate the platform-independent requests into the device-specific protocol. Besides platform abstraction, the deployment planning of services is a major requirement. Thus, we put special focus on the Service Mapper component, which determines a deployment plan that satisfies a number of constraints.
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.
9477654
An Aggregating Discovery Service for the EPCglobal Network
Although the achievements of EPCglobal standardization efforts in the last years are substantial and the diffusion of the EPCglobal network continues, a service to access item-level information stored at potentially unknown supply chain partners is still missing. Without this 'Discovery Service' the EPCglobal network cannot be used with unknown business partners. In this contribution we present a novel Discovery Service approach. In contrast to other Discovery Service approaches we use the Discovery Service to aggregate the data of interest. This eliminates problems other approaches cannot solve, e.g. assuring data ownership, low access control maintenance effort, and minimal complexity for the information requester. We present a requirements model, describe the implementation of our Discovery Service approach, and compare it to existing Discovery Service approaches. Finally we show how to overcome scalability challenges to implement our Discovery Service approach in a real-world environment.
35750619
Restricted T-Universal Functions
We prove the existence of a function @f which is holomorphic exactly in the unit disk D and has universal translates with respect to a prescribed closed set [email protected][email protected]?D and satisfies @[email protected]?C^~(@?D\E). If Q is a subsequence of N"0 with upper density d(Q)=1 then the function @f can be constructed such that in [email protected] (z)[email protected]?n=0~a"nz^nwitha"[email protected]?Q.