55,265 research outputs found
Slovenian Virtual Gallery on the Internet
The Slovenian Virtual Gallery (SVG) is a World Wide Web based multimedia collection of pictures, text, clickable-maps and video clips presenting Slovenian fine art from the gothic period up to the present days. Part of SVG is a virtual gallery space where pictures hang on the walls while another part is devoted to current exhibitions of selected Slovenian art galleries. The first version of this application was developed in the first half of 1995. It was based on a file system for storing all the data and custom developed software for search, automatic generation of HTML documents, scaling of pictures and remote management of the system. Due to the fast development of Web related tools a new version of SVG was developed in 1997 based on object-oriented relational database server technology. Both implementations are presented and compared in this article with issues related to the transion between the two versions. At the end, we will also discuss some extensions to SVG. We will present the GUI (Graphical User Interface) developed specially for presentation of current exhibitions over the Web which is based on GlobalView panoramic navigation extension to developed Internet Video Server (IVS). And since SVG operates with a lot of image data, we will confront with the problem of Image Content Retrieval
Global Grids and Software Toolkits: A Study of Four Grid Middleware Technologies
Grid is an infrastructure that involves the integrated and collaborative use
of computers, networks, databases and scientific instruments owned and managed
by multiple organizations. Grid applications often involve large amounts of
data and/or computing resources that require secure resource sharing across
organizational boundaries. This makes Grid application management and
deployment a complex undertaking. Grid middlewares provide users with seamless
computing ability and uniform access to resources in the heterogeneous Grid
environment. Several software toolkits and systems have been developed, most of
which are results of academic research projects, all over the world. This
chapter will focus on four of these middlewares--UNICORE, Globus, Legion and
Gridbus. It also presents our implementation of a resource broker for UNICORE
as this functionality was not supported in it. A comparison of these systems on
the basis of the architecture, implementation model and several other features
is included.Comment: 19 pages, 10 figure
FORGE: An eLearning Framework for Remote Laboratory Experimentation on FIRE Testbed Infrastructure
The Forging Online Education through FIRE (FORGE) initiative provides educators and learners in higher education with access to world-class FIRE testbed infrastructure. FORGE supports experimentally driven research in an eLearning environment by complementing traditional classroom and online courses with interactive remote laboratory experiments. The project has achieved its objectives by defining and implementing a framework called FORGEBox. This framework offers the methodology, environment, tools and resources to support the creation of HTML-based online educational material capable accessing virtualized and physical FIRE testbed infrastruc- ture easily. FORGEBox also captures valuable quantitative and qualitative learning analytic information using questionnaires and Learning Analytics that can help optimise and support student learning. To date, FORGE has produced courses covering a wide range of networking and communication domains. These are freely available from FORGEBox.eu and have resulted in over 24,000 experiments undertaken by more than 1,800 students across
10 countries worldwide. This work has shown that the use of remote high- performance testbed facilities for hands-on remote experimentation can have a valuable impact on the learning experience for both educators and learners. Additionally, certain challenges in developing FIRE-based courseware have been identified, which has led to a set of recommendations in order to support the use of FIRE facilities for teaching and learning purposes
A comprehensive fractal approach in determination of the effective thermal conductivity of gas diffusion layers in polymer electrolyte membrane fuel cells
The challenges in the fuel cell industry is to produce the efficient thermal and water
management for accurate determination of the effectiveness thermal conductivity of
gas diffusion layers (GDL) used in polymer electrolyte membrane fuel cells
(PEMFC‟s). This is one of the factors affecting the durability of a fuel cell and need
to get a solution to minimize costs and optimize the use of electrodes and cells. The
main objectives of this research focus on the capability of the fractal approach for
estimation the effectiveness of thermal conductivity of gas diffusion layer. Moreover,
on this research also to propose modified fractal equations in determination of the
effective thermal conductivity of GDL in PEMFCs based on previous study. Other
objectives in this study are demonstrated the thermal conductivity of GDL treated
with PTFE contents by using through-plane thermal conductivity experiment
method. The through-plane measurement (experiment method) has been used in
estimating through-plane thermal conductivity of the GDL. Thermal resistance for
GDL also has been investigated under compression pressure 0.1 MPa until 1.0 MPa.
In fractal equation, the determination of tortuous and pore fractal dimension can be
done by using Scanning Electron Microscopy (SEM) method. Determination of
effectiveness thermal conductivity using of fractal equation with slightly modified.
In findings, it was found that fractal equation have been modified and measured on
the GDL parameter characteristics. It was shown that the value of the effectiveness
thermal conductivity of the sample using fractal approach is in good agreement with
the experimental value. Finally, all the effective thermal conductivity measured by
experimental and fractal approach have been determined with the variant temperature
and compression pressure to show the validation result between of this two methods
Constructing a Virtual Training Laboratory Using Intelligent Agents
This paper reports on the results and experiences of the Trilogy project; a collaborative project concerned with the development of a virtual research laboratory using intelligence agents. This laboratory is designed to support the training of research students in telecommunications traffic engineering. Training research students involves a number of basic activities. They may seek guidance from, or exchange ideas with, more experienced colleagues. High quality academic papers, books and research reports provide a sound basis for developing and maintaining a good understanding of an area of research. Experimental tools enable new ideas to be evaluated, and hypotheses tested. These three components-collaboration, information and experimentation- are central to any research activity, and a good training environment for research should integrate them in a seamless fashion. To this end, we describe the design and implementation of an agent-based virtual laboratory
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