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Nowadays, the wireless access network infrastructure is growing at an accelerated pace. In the current environment, which consists of a multitude of wireless networks, live migration of multimedia streaming between different type of connectivity offers important advantages for mobile users. In this paper we provide the description of an efficient mobility service architecture for multimedia environments...
Proportional fairness has been shown to maximize the aggregate utility of rate control for elastic traffic in a resource sharing communication network, and has been applied to a broad range of resource allocation problems. For a refined analysis, however, the representation of proportional fairness as a relation between vectors with positive components will often not provide the level of detail that...
In this paper, we propose a theoretical framework (conceptualization and formalization) which seeks to model obesity as a process of transformation of one's own body determined by individual (physical and psychological), inter-individual (relational, i.e., relative to the relationship between the individual and others) and socio-cultural (environmental, i.e., relative to the relationship between the...
Current dynamic and turbulent markets require flexible business processes that increasingly depend on fast and reliable information flows between heterogeneous companies. This relies on innovative types of integrated applications on all layers -- technological, organizational and process-related -- and a holistic managerial framework to establish a smoothly operating layer integration. Thus, we first...
Today smart phones integrate many sensors and provide large computing capacities. They enable the shift towards massive quantities of real-time information becoming access push rather than demand pull on a global case. In this we describe CAPIM, a platform to support such a paradigm. It integrates services to monitor and a context for adapt with the user's context using sensors and capabilities of...
Spam messages are becoming a serious problem for most system administrators and computer users. Along with the increase in spam volume there is also a need for efficient detection methods which are able to cope with the analysis of thousands of emails per day. In this article we present a novel solution for spam detection which is based on a service oriented architecture, able to scan and classify...
In many industries, large amounts of resources are allocated for continuous technology development. However, these investments may prove inefficient if a disruptive technology arises that provides new and more attractive customer propositions. While this phenomenon has been the subject of numerous papers, there is still a lack of managerial tools that properly address the challenge of responding to...
Large Web sites contain a plethora of different menus and navigation aids, which implement systems of content organization as hierarchies, linear structures or matrices. Humans are able to decode the fine-grained content organization because they are aware of the different access methods provided by navigation systems and understand the higher-level information architecture. In contrast, current methods...
Recent large-scale disasters and territorial emergencies, such as the Japan seaquake and Australian inundation, have brought to the attention the efficiency of the rescue operation. Such scenarios are unpredictable and require a prompt and coordinated reaction from the authorities. This paper presents an architectural approach for coordination and cooperation based on the Multi-Agent technology. In...
With the increased focus on optimizing procurement processes, different procurement concepts have been developed. However, for these concepts no widely accepted best practice solutions exist. Furthermore, customers often impose specific conditions on suppliers. Thus implementations of these concepts are always different. Consequently suppliers cannot provide standardized services (e.g. Vendor Managed...
Small and Medium Enterprises (SMEs) face especially increasing pressure to establish efficient business-to-business (b2b) integration solutions and to focus on their core competences, to stay competitive in the globalized economy. As b2b integration solutions are complex and dynamic by nature, SMEs need a properly planned, methodological approach. To guide SMEs in that process this paper introduces...
Initiatives of making government data open are continuously gaining interest recently. While this presents immense benefits for increasing transparency, the problem is that the data are frequently offered in heterogeneous formats, missing clear semantics that clarify what the data describe. The data are displayed in ways, which are not always clearly understandable to a broad range of user communities...
Product recommendation on electronic commerce Web sites becomes more important with the widespread use of Internet-based shopping. Collaborative filtering and content based filtering methods have been commonly used for this task by electronic commerce Web sites. These methods have several shortcomings, such as cold start problem, biased ratings problem or inaccurate recommendations. In order to produce...
There are large scientific data archives manage and store huge quantities of data, deal with this data throughout its life cycle, and focus on particular scientific domains. These scientific data is usually generated by specific devices or sensors. While the number of sensed data file is daily increased, utilizing an efficient to access daily-incremental data set is increasing important. In this paper,...
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