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The large and growing number of computing devices used by individuals has caused the challenges of distributed storage to take on increased importance. In addition to desktops and laptops, portable devices, such as cell phones, digital cameras, iPods, and PDAs are capable of storing and sharing data. These devices’ mobility coupled with wireless networking capabilities allows them to opportunistically...
In this paper we propose a new way to identify communities in evolving graphs like collaborative networks. We apply this approach on the Infocom co-authorship network to determine stable collaborations and evolving communities. Finally, we analyse the impact of the co-authorships relation topology on the formation of the program committee board of the conference.
The Much advancement has lately occurred in eCommerce systems’ interfaces. Product specifications listings combined with pictures is no longer considered the benchmark for eCommerce interfaces. Albeit commercial websites haven’t ventured in these developments, academic research has tried, through this progression, to mimic the real-life shopping experience. Shopping in real-life is a social experience...
In this paper we present an original approach to model the user communication context and enable then context-aware communication services. The context is modeled through an ontology written in the W3C’s standard language OWL. Our ontology is enhanced into an active model by providing it a rule engine and a set of inference rules. To illustrate our research, we give an example of a scenario in which...
The adaptability of sensorial capabilities is crucial for the performing of daily activities in intelligent environments. There are a number of features that have to be considered, however, in order to avoid constraints of certain technologies. In this work we analyze model and interaction changes using Radiofrequency Identification (RFID) and Near Field Communication (NFC) technologies. When these...
In this work we describe an architecture supporting the exposition of Context-Aware services. First, we discuss the meaning of context in computing. Second, the data sources composing the context are listed and defined. A definition of the meaning of Context Aware service is also provided. Our design is based on these definitions, and targeted to provide Context-Aware services to mobile users. The...
The concept of Virtual Organization (VO) is a natural outcome of networks evolution and collaborative work tools growth. In the projects VIVACE and TSCP, we have studied the different issues when setting VOs up. In this paper, we expose requirements and characteristics of VOs through a use case, which was proposed by these consortiums. Then, we present a secured collaborative environment, which combines...
Chair for communication Technology University of Kassel Context prediction is closely related to the learning of typical user context patterns. A decrease in the learning accuracy likely reduces the context prediction quality. We study the impact of context pre-processing on the learning efficiency of context prediction schemes. In particular, influences of the context data abstraction level on the...
This position paper describes our approach to recognizing tasks of mobile users in a smart environment. Such high-level interpretation of behavior enables context-aware applications to adapt to the users’ needs and intentions. In the AI community, plan recognition techniques have proven their applicability in recognizing the tasks of software agents in a controlled environment. However, these approaches...
Low value electronic content is not being offered following a model in which the content is accessed clicking in a new sort of links called per-fee-links. The goal of these links is making the (micro)payment of a web content as simple as possible: just by clicking on a link. Despite this model has been proposed as an approach to pay low-value content on the web, we do not find any existing framework...
Information and communication technologies have transformed the way people work and have a growing impact on long life learning. Organizational learning is an increasingly important area of research that concerns the way organizations learn and thus augment their competitive advantage, innovativeness, and effectiveness. Within the project MEMORAe2.0, we are interested by the capitalization of knowledge...
In recent years, electronic markets are increasing rapidly and attracting the attention of customers. In these sites, people search for products using retrieval systems. They, however, often cannot translate their subjective needs into keyword-based queries or adapt to the interfaces. In this paper, we describe a product retrieval system robust to subjective queries. Using a large amount of consumer...
Due to more and more mobile computers moving among smart and communicating devices in our everyday life, we observe the emergence of new constraints in software design. Indeed, device heterogeneity, dynamic software variation, and frequent mobile device apparition/disappearance make software applications compulsorily adapt to their context. In this paper, we will present an enhancement of ambient...
In this paper, we outline the HDQ meta-model and exemplify its application to a realistic organizational scenario within a methodology for assessing and improving corporate data quality. The main aim of the HDQ meta-model is to support the modeling of the information resources used within an organization towards the application of comprehensive but yet lean methodologies of data quality improvement...
A major need of multimedia indexing and retrieval on a P2P network is related to characterisation of classes. Currently, many multimedia retrieval systems have been proposed and developed but these systems are not designed to be distributed across different computers on a network. We focus on the case that many retrieval systems exist on the network where all densities are Gaussian mixtures due to...
Content based data retrieval technology is well-known in the information retrieval area. It assumes that the subject data is unstructured, but sometimes this data can be structured. This is true for computer programs. In this paper, we have proposed a canonical form of program source codes, which explicitly reveal the program structure explicitly As an application of the canonical form, the program...
The peer-to-peer (P2P) paradigm is emerging as a possible solution to some of the problems in distributed data processing, including scalability, availability, and administrative cost. P2P has already proved to be suitable in contexts like file sharing, distributed computations, and distributed search. In our research we are aiming at using P2P to solve some problems in the domain of distributed databases...
Unsupported Z39.50 access points result to query failures and/or inconsistent answers, in spite of the protocol specification for a unified global access mechanism. A challenge to this issue is to substitute an unsupported access point with others, so that the most similar semantics to the original access point can be obtained. In this paper, we describe the Bib-1 access points semantics of the Z39...
Implementing production of XML documents is a rarely discussed topic in academic literature even though it is an important issue in many contemporary organizations. This paper describes findings from three case organizations where different kinds of XML documents were implemented. Our findings suggest that the implementation is a domain-specific task related to various kinds of organizational activities...
Advances in commercial and scientific data collection have generated a flood of data which has triggered the need to turn such data into useful information and knowledge to identify novel, potentially useful patterns in data stored in databases. This work presents the development, implementation and application of an adaptive apriori algorithm for mining large datasets focusing on extracting interesting...
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