Search Results

You are looking at 61 - 70 of 485 items for :

  • "Virtuality" x
  • All content x
Clear All

The paper deals with the analysis of unbalance regime in three-phase low voltage supply systems. For unbalance evaluation a virtual instrument realized in Java programming language was developed. This tool can be used in protection schema for the electric distribution network, especially in the common point of supplying the industrial consumers, where the electric equipments can be severely affected by continuously functioning in an unbalanced regime of the power supply. The case study includes determination and analyzes of the unbalance indicators for inductive consumers with and without neutral conductor.

Restricted access

Abstract  

Gamma-ray spectrometry losses through pulse processing dead time and pile-up are best assayed with an external pulse technique. In this work, the virtual pulse generator technique as implemented commercially with the Westphal loss free counting (LFC) module is set up and tested with four high resolution gamma-ray spectrometers. Dual source calibration and decaying source techniques are used in the evaluation of the accuracy of the correction technique. Results demonstrate the reliability of the LFC with a standardized conventional pulse processing system. The accurate correction during high rate counting, including during rapid decay of short lived activities, has been the basis for highly precise determinations in reference materials studies.

Restricted access
Scientometrics
Authors: L. Quoniam, F. Balme, H. Rostaing, E. Giraud, and J. Dou

Abstract  

Zipf's law was used to qualify all the key-words of documents in a data set. This qualification was used to build a graphical representation of the resulting indicator in each document. The graphical resolution leads to a document dispatch in a three dimensional space. This graphical representation was used as an information retrieval tool without using any keyword. The presentation of a case study is internet available. The graph is drawn in Virtual Reality Markup Language (VRML) allowing a dynamic picture which is linked to a Database Management System (FreeWais). The experimentation was drawn to get a first impression of documents data set by querying without any keyword.

Restricted access
Scientometrics
Authors: Gaston Heimeriks, Marianne Hörlesberger, and Peter Van Den Besselaar

Abstract  

The aim of this mainly methodological paper is to present an approach for researching the triple helix of university-industry-government relations as a heterogeneous and multi-layered communication network. The layers included are: the formal scholarly communication in academic journals, the communication network based on project collaborations, and finally the communication of information over the 'virtual' network of web links. The approach is applied on typical 'Mode 2' fields such as biotechnology, while using a variety of data sources. We present some of the initial findings, which indicate the different structures and functions of the three layers of communication.

Restricted access

Abstract  

By adapting noise filtering to individual pulse intervals, the Preloaded Filter (PLF) pulse processor (1) combines high resolution with optimum throughput efficiency. As a consequence, its output pulse interval distribution contains strong non-random components which render conventional ADC dead-time correction an impossibility. Quantitative correction of dead-time and pileup losses of the PLF processor may be achieved, however, with the Virtual Pulse Generator (2), together with a new, distribution-independent method of measuring ADC losses which is based on a pulse counting technique.

Restricted access

One of the main aims of European ethnology in the second half of the 20th century was to create the ethnographical atlases of various nations in Europe. The basic purpose of the cartographical elaboration of the regional variants of certain cultural elements of the given nation in a certain system and that of collecting them into atlases was to create a database on which investigations could be carried out to define the territorial structure of the given folk culture. The easiest way to define this territorial pattern is the computer elaboration of the database, which means the digitalization and the cluster analysis of the data made by computer. On the methods and on the possibilities of the computer elaboration of the Atlas of Hungarian Folk Culture (AHFC) a paper was held by the author at the 11th Conference of the SIEF’s International European Network (Workgroup) on Ethnocartography in Poland (Borsos 2000). At the 12th conference in Slovakia the author talked about the first results of the cluster-analysis (Borsos 2000/2001).In the last decade the computer programs for the digital version of the AHFC have been developed and the digital version has been extended with supplementary maps as well. As in the digital version we can find not simply scanned pictures of the original sheets but the basic structure of the atlas (base-map, collecting points) is also available, it is not only possible but fairly easy to add new (virtual) sheets to the atlas. So the Atlas has been supplemented with maps elaborating some of the statistical data (demographic and agricultural) of the period between 1900–1910, which is the time interval represented by the cultural data of the atlas. This virtual 10th volume of the atlas contains ‘sheets’ about important information on the cultural picture of the settlements shown and of their cultural environment. The new volume can also help to draw a more accurate map about cultural regions. Another type of supplementary maps can be seen in the virtual 11th volume showing the regional distribution of the territory inhabited by Hungarians regarding cultural and non-cultural aspects. The last section of the distributional maps shows the regional structure of the Hungarian folk culture based on the computer elaborated data of the first 9 volumes, as well as the synthetic regional structure based on the comparison of the computer-drawn picture with three other sources: the statistical investigations of the database, the maps of the two virtual volumes and the scientific literature.

Restricted access

This paper presents three versions of the construction of the author’s position which aim at the creation of new types of communication. 1) The elimination of traditional genre differentiations which lead to the construction of narration, signalling a direct communication with the recipient (V. E. Yerofeev). 2) The transcendence of the limits of the word and the introduction into verbal texts of principles of semiosis from other arts, signalling the orientation towards a new antropology (D. A. Prigov). 3) The introduction of a virtual contact with the reader into the process of the creation of the text (E. Popov).

Restricted access

A new dimension in thermal analysis

Virtual class-room teaching over the Internet

Journal of Thermal Analysis and Calorimetry
Author: Ole Toft Sørensen

Summary An enormous development has taken place within the last five years in synchronous teaching over the Internet, i.e. both the teacher and the students are simultaneously in direct communication with each other as in a normal class-room or auditorium. With this concept it is possible to communicate orally, to exchange Power Point Presentations, documents, programmes and live web-camera pictures. It is even possible to use an electronic ‘black’ board on which both the teacher and the students can work simultaneously. The great advantage with this type of teaching is that it is not restricted to a single class-room/auditorium with limited access, but in a virtual room accessible to everybody in principle all over the world, and which certainly open up new possibilities in teaching. The purpose of this paper is to present and to discuss the concept of virtual class-room teaching, how the system operates in practice, its advantages and, finally, how its inherent limitations can be overcome.

Restricted access

-Coon , A. , Pogue , J. R. , Carlbring , P. , & Powers , M. B. ( 2019 ). Virtual reality exposure therapy for anxiety and related disorders: A meta-analysis of randomized controlled trials . Journal of Anxiety Disorders , 61 , 27 – 36

Restricted access

://www.jwatch.org/na49035/2019/05/02/telemedicine-could-lowerbarriers- primary-care 3 Ladika S. Virtual primary care ‘visits’? That future is already here. 2020

Restricted access