Technological Educational Institute of Western Macedonia

About: Technological Educational Institute of Western Macedonia is a based out in . It is known for research contribution in the topics: Symplectic geometry & Numerical integration. The organization has 291 authors who have published 522 publications receiving 7682 citations. The organization is also known as: TEI of West Macedonia & TEI of Western Macedonia.

S.A.T.E.P. : Synchronous-Asynchronous Tele-education Platform

Abstract: S.A.T.E.P. means Synchronous Asynchronous Tele education Platform is a software application for educational purposes, with a lot of parametrizing features written entirely from scratch. It aims at the training and examination of computer skills, a platform that can be adjusted to the needs of each lesson. In the application the trainer and the administrator can define the number of the lectures and upload files for each one of them. Furthermore, he can insert, modify and delete questions which are used for evaluation tests but also for the trainees examinations. The trainee can read and download the files of each lesson and also test his knowledge on what he has studied through a series of questions. A chat module where registered users as well as system administrator can discuss and solve questions is also developed.

Single and Two Shaft Gas Turbine Configurations Performance Analysis, Using Different Types of Fuels

Abstract: Coal gas and biofuels as alternative fuels have recently become more attractive, because of their benefits, especially in electrical power industry. The major obstruction to their use is the relatively low calorific values. This paper presents a comprehensive simulation method for calculating the adiabatic temperature of various fuels when they are used in combustion chambers under constant pressure. The adiabatic temperature is presented as a function of combustion fuel air ratios and the fuels low calorific values. In addition, the utilization of various gaseous fuels in single shaft and two shaft gas turbine engines is analyzed. This analysis includes the design point (DP) and off-design (OD) performance of the two engines. The calorific values of the four gases investigated correspond to natural gas (NG) and to fuels with significantly lower calorific values than that of NG (coal synthetic gases, biofuels). Two main conclusions are drawn from this analysis. Firstly, for both single shaft and two shaft engines and for a given turbine entry temperature (TET), both power and thermal efficiency are increasing when fuels with decreasing calorific value are burnt. Secondly, for both single shaft and two shaft engines and for a given power, the thermal efficiency is slightly reduced.Copyright © 2009 by ASME

Assessing the Impact of Economic Crisis on Food Firms Performance

Abstract: The objective of this study is to draw conclusions about the changes in business strategies and changes in the factors affecting the competitiveness of food and beverages companies during economic downturn. The real impact of 2009 crisis in Greece on firm-level performance is investigated through two surveys. The study provides valuable insights and implications about how to facilitate the marketing strategies and practices during periods of debt crises. According to the results of the analysis, there are significant performance changes over the crisis period.

The Effects of Country-of-Origin on Consumers’ CSR Perceptions, Behavioral Intentions, and Loyalty

Abstract: The present study investigates the impact of country-of-origin on Greek consumers’ corporate social responsibility (herein CSR) perceptions, behavioral intentions, and loyalty. Towards this end, two surveys were conducted, one for domestic and one for foreign companies. Results suggest that consumers expect from companies to respond to their legal, ethical, and discretionary responsibilities irrespective of their country-of-origin. However, Greek consumers demand from domestic companies to respond in a higher extent to their economic goals compared to their foreign counterparts. Moreover, they tend to favor national companies since they were found to be more willing to pay a higher price for domestic than for foreign products. Consumer loyalty was also affected by a company’s country-of-origin as consumers exhibited higher loyalty levels for products of domestic than of foreign corporations. Finally, several practical implications are discussed at the end of the paper.

Automated drawing system of quantum energy levels

Abstract: The purpose of this work is to derive an automated system that provides advantageous drawings of energy spectra for quantum systems (nuclei, atoms, molecules, etc.) required in various physical sciences. The automation involves the development of appropriate computational code and graphical imaging system based on raw data insertion, theoretical calculations and experimental or bibliographic data insertion. The system determines the appropriate scale to depict graphically with the best possible way in the available space. The presently developed code operates locally and the results are displayed on the screen and can be exported to a PostScript file. We note its main features to arrange and visualize in the available space the energy levels with their identity, taking care the existence in the final diagram the least auxiliary deviations. Future improvements can be the use of Java and the availability on the Internet. The work involves the automated plotting of energy levels in molecules, atoms, nuclei and other types of quantized energy spectra. The automation involves the development of an appropriate computational code and graphical imaging system.