A Modular Logic Approach for Expressing Web Services in XML Applying Dynamic Rules in XML

RuleML is considered to be a markup language for the semantic web. It allows the enrichment of web ontologies by adding definitions of derived concepts and it enhances interoperability among different systems and tools by publishing rules in an XML format. Moreover the in-creasing demand for interfaces that enhance information sharing has given rise to XML doc-uments that include embedded calls to web services. In this paper we propose a variation of RuleML that is based on modular logic programming. Our approach is based in a two level architecture. In the first level a modular logic language, called M-log, is presented. This lan-guage encompasses several mechanisms for invoking web services. In the second level we ex-ploit the semantics of M-log to present a variation of RuleML with rich modeling capabilities. Formal foundations for this variation are given through direct translation to M-log semantics.Knowledge Management, XML, Modular Logic Programming, E-Services

An Auditing Approach for ERP Systems Examining Human Factors that Influence ERP User Satisfaction

This paper tries to connect the successful implementation and operation of the ERP (Enterprise Resource Planning) information systems with people and their characteristics through a pilot survey. It examines the human factors that influence ERP user satisfaction. The presented survey tests 14 hypotheses and is based on the model developed by Zviran, Pliskin & Levin [21]. An additional factor has been added to the specified model, the self-efficacy factor analyzed by Bandura [1]. The results are based on 250 ERP users that responded to the survey. The key findings that were revealed by data analysis were that none of the human socio-demographic characteristics do influence ERP user satisfaction. Additionally it was found that perceived usefulness and self-efficacy are the key directors of the ERP user satisfaction. Moreover suggestions are given about how the companies should handle ERP usage in order to develop the prerequisites for increasing user satisfaction and productivity accordingly.ERP Audit, User Satisfaction, Perceived Usefulness

Representing Time-dependent Information in Multidimensional XML

Multidimensional XML (MXML) is an extension of XML that incorporates dimensions in order to represent in an elegant and concise way context-dependent data, that is, data which can exhibit different variations in value or structure (e.g. that can exist in different languages or various degrees of detail). In this paper we show that MXML dimensions can be used to express time and associate it with XML elements and attributes. We discuss the properties of time domain and the features of MXML which are necessary in order to represent time, and give key points that motivate further investigation on the use of MXML for representing time-dependent data

An Auditing Approach for ERP Systems Examining Human Factors that Influence ERP User Satisfaction

This paper tries to connect the successful implementation and operation of the ERP (Enterprise Resource Planning) information systems with people and their characteristics through a pilot survey. It examines the human factors that influence ERP user satisfaction. The presented survey tests 14 hypotheses and is based on the model developed by Zviran, Pliskin & Levin [21]. An additional factor has been added to the specified model, the self-efficacy factor analyzed by Bandura [1]. The results are based on 250 ERP users that responded to the survey. The key findings that were revealed by data analysis were that none of the human socio-demographic characteristics do influence ERP user satisfaction. Additionally it was found that perceived usefulness and self-efficacy are the key directors of the ERP user satisfaction. Moreover suggestions are given about how the companies should handle ERP usage in order to develop the prerequisites for increasing user satisfaction and productivity accordingly

Representing Context-Dependent Information Using Multidimensional XML

XML (eXtensible Markup Language) is emerging as a new standard for data representation and exchange over the Web [3]. It is a markup language that resembles HTML, but unlike HTML, it focuses on the structure of data rather than on their presentation. The extensibility of XML makes it an ideal candidate for integration and manipulation of Web data through a common data model. A large number of DTDs (XML Document Type De nitions) that target all sorts of information domains has already been developed, and new DTDs are released at a fast pace. XML claims to be the enabling technology for application interoperability and for a uni ed view of heterogeneous information. However, the nature of the Web poses a number of new problems. On the one hand, in traditional databases and information systems the number of users is more or less known and their background is to a great extend homogeneous. On the other hand, Web users do not share the same background and do not apply the same conventions when interpreting data. Such users can have di erent perspectives of the same entities, a situation that should be taken into accoun

Implementing Security in a University Network

This paper describes the implementation of a revised security plan in the Technological and Educational Institution Stereas Elladas. This technology uses smart cards and 8 digits alphanumeric to provide high data security and encrypted communications in the university campus network

An Insight on E-Learning and Cloud Computing Systems

In this paper, there is a review of e-learning and its elements according to the international standards. The connection of learners, educational material and open source learning plat-forms is investigated. Trivial educational activities that can be implemented in a LMS are also presented. A special report on a computational model for e-learning, emphasizing on learning graphs and conditions passing from one node to another, is made. In this framework the bene-fits of cloud computing as a model for e-learning are presented