We derive nonparametric tests of symmetry using asymmetric kernels with either shrinkingor fixed bandwidths. We show how to extend the approach to examine conditional symmetry byderiving conditions under which our tests are applicable to residuals from semiparametric modelswith a (sufficiently...

[...]In this article, we provide insight into the policyaspects of this informational time decay by assessing howthe length of time between bank examinations affects thequality of information available to supervisors. For thesepurposes, we define the quality of information in terms ofhow...

The current financial crisis forces companies to allocate IT budgets more effectively and thusincreases the demand for suitable methods to evaluate the financial impact of IT investments. Thisespecially applies to service-orientation, a design paradigm which facilitates the standardisationand...

This paper presents a framework for Service Level Management indynamic, heterogeneous environments for service composition. Compositions areselected based upon previously observed performance and the associated riskderived from such observations. The architecture of a framework is introduced...

The cloud computing paradigm gives rise to Web service marketplaces where complex services areprovided by several modular vendors. Recently more and more intermediaries are pushing onto themarket, thereby driving competition. Offering innovative business models which are capable ofattracting...

The fundamental paradigm shift from a product- to a service-oriented economy implies novel technical and organizational challenges. The value generated by a service is mainly represented by intangible elements exposed at execution (Hill 1977). Therefore, a service consumer expects a service to...

With the development of new internet technologies new security problems arise. Thus, it isimportant to consider security aspects during the complete development process of a web application.Every participant of such a process should have the appropriate knowledge. Classicallearning methods are...

This paperoperationalizes correctness for Web service compositions. It also proposes a requirementsframework for service-oriented modeling techniques so that correctness can beshown by verification and Web service compositions can be modeled intuitively.

In practice the ability to find the right Web service decides between a functionality being implemented anew and at least the possibility of executing it via a service. This report evaluates existing public portals for Web service discovery with respect to their characteristics and their...

Im Beitrag wird beschrieben, wie bei der Entwicklung von Services für eine ServiceorientierteArchitektur (SOA) vorgegangen werden kann. Im Vordergrund steht dabei – imGegensatz zu den meisten bisher vorliegenden Veröffentlichungen zum Thema SOA – diefachliche Gestaltung und nicht die...