In this paper we propose both a reference architecture for building scalable and dynamic virtual market places and a new framework for dynamic query processing based on so-called HyperQueries which are essentially query evaluation sub-plans “sitting behind” hyperlinks. Architecting an electronic market place as a data warehouse by integrating all the data from all participating enterprises in o...

Strategies that integrate conservation and development are especially critical in regions where ecosystems provide direct and indirect benefits for local users and others, and where because of institutional conditions there is a commons dilemma. State intervention is sometimes thought necessary and desirable to correct the externalities arising from the conflict between short-term needs to extr...

Manufacturing systems are often costly to develop and operate. Simulation technology has been demonstrated to be an effective tool for improving the efficiency of manufacturing system design, operation, and maintenance. But manufacturing simulations are usually developed to address a narrow set of industrial issues, e.g., the purchase of new equipment or the modification of a manufacturing proc...

Modelling life events is a task of a crucial importance and a first necessary step towards supporting resolution of a particular life event on the active e-government portal. The use of reference models as templates for building life-event models promises savings in time and costs of the modelling process. At the same time, using reference models can increase the quality and accuracy of the est...

This study examined the effects of two variables on spatial learning: the objects’ array (with or without a central reference point) and the learning method (virtual walk through or seeing still images). After learning the objects’ locations and their positional relations in a virtual room in egocentric reference frames, participants judged the directions to a target from an imaginary position ...

New updated! The reference and information services an introduction 3rd edition library and information science text from the best author and publisher is now available here. This is the book that will make your day reading becomes completed. When you are looking for the printed book of this PDF in the book store, you may not find it. The problems can be the limited editions that are given in t...

REFERENCE LIBRARIANS MUST TAKE THE LEAD in the new era of information. It is not enough to follow traditional patterns of service. Reference services technology has passed its first stage of insuring more accurate, rapid delivery of information. The second revolution, which is underway, will improve on both acquisition and retrieval of data. It is necessary to fit new technologies into traditio...

Reference and information services in the 21st century : an introduction / Kay Ann Cassell and Uma Hiremath. — 2nd ed. rev. p. cm. Includes bibliographical references and indexes. A companion Web site keeps this text up-to-date! This Web site features new readings for each chapter and information about changes in the reference tools described in these pages as well as important new ones. The in...

The realisation of e-Government services, in particular in Switzerland, has made limited progress. This is due – on the one hand – to the federal constitution of the Swiss Confederation. On the other hand, public administrations are concerned about the high initial effort and the corresponding financial investments. With the OntoGov system, reference process models are provided at various abstr...

It has been obvious for some years that the web will become an extraordinarily powerful medium for electronic publishing. So it is surprising that most of the early innovators in web publishing have been amateurs and enthusiasts, usually with little or no interest in commercial development. Perhaps the best example of this is Paul Ginsparg's e-Print archives — an initiative that anticipated com...