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- Πλοήγηση Επιστημονικές Δημοσιεύσεις ανά ημερομηνία δημοσίευσης
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Πλοήγηση Επιστημονικές Δημοσιεύσεις ανά ημερομηνία δημοσίευσης
Αποτελέσματα 1-20 από 332
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(1991)Παρασκευάστηκαν κρύσταλλοι V2O5 και μελετήθηκε η ηλεκτρική τους αγωγιμότητα στην περιοχή μεταξύ 200 - 300 Κ. Λήφθησαν χαρακτηριστικές Ι(103/T) και Ι(U). Οι τελευταίες αποτελούνται από μία ωμική και μία S-τύπου περιοχή με ...
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(1993)A study of the optical properties of the layered compound TlInS2 is presented. Reflection spectra were measured at room temperature, in the energy region 1.5-6.2 eV. Transmission spectra were measured in the temperature ...
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(1996)Absorption and photoconductivity spectra of thin TlGaS2 layers are used to study tbe fundamental and other transitions of TlGaS2 in the energy region 1.0-3.0 eV and in the temperature range lo-300 K. One of the peaks ...
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(1996)Επιταξιακά υμένια κυβικού και εξαγωνικού GaN, μελετώνται με χρήση φασμάτων απορρόφησης ακτίνων Χ, στην περιοχή της ακμής (ΝEXAFS), μετρημένων υπό διάφορες γωνίες. Στην περίπτωση του κυβικού GaN οι εντάσεις των γραμμών ...
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(2000-11-09)Planar microwave structures which combine electromagnetic fields and network parameter descriptions are analysed using the finite element (FE) method. The predicted performance of a nonsymmetrical three-port power divider ...
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(2003)The years of school enrollment represent a crucial period of a person's life. The schooling experience forms the foundations of human evolution. The school day represents 30% of each school child's everyday activity ...
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(2004)Many problems in portfolio selection, in traffic planning and in computer communication networks can be formulated as nonlinear problems involving minimization of a nonlinear function over simplices. Based on the concepts ...
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(2004)In this article, the author seeks to assess the design, development and three-year operation of a new course curriculum in applied technology in a Greek Technological Educational Institute (TEI). The constant increase in ...
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(2005)A method of sizing stand-alone photovoltaic systems regarding the reliability to satisfy the load demand, economy of components, and discharge depth exploited by the batteries is presented in this work. Solar radiation ...
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(2005)This article examines the support that information systems may provide to the strategy process in business organisations. Being the process through which organizations make decisions for their future, strategy is very ...
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(2005)The computational costs of three numerical techniques used in electromagnetics, namely the moment method (MoM), the method of auxiliary sources (MAS), and its modified version (MMAS), are estimated for various calculation ...
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(2005)This paper presents a rigorous accuracy analysis of the method of auxiliary sources (MAS) for the problem of oblique incidence plane wave scattering by a perfectly conducting, infinite circular cylinder. For this particular ...
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(2005)The purpose of this paper is a rigorous error estimation of the Method of Auxiliary Sources (MAS), when the latter is applied to electromagnetic scattering from a circular, coated, perfectly conducting cylinder, assumed ...
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(2005)Among the environmental problems emerged in the majority of modern cities, noise pollution along with air pollution is considered to be the most important ones. Traffic noise is a priority issue in the EU. According to a ...
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(2005)This paper explicitly seeks to confront theory with fact regarding regional convergence taking the prefectures of Greece as a case study. The maίn question to be tackled ίη this paper is whether prefectures of Greece ...
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(2005)This paper proposes a methodology through which advanced Geographic Information Systems’ (GIS) techniques are applied in the study of environmental traffic-related noise. The spatial nature of the factors affecting ...
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(2005)This paper presents an experimental Learning Management System (LMS).The usability aspect of its functions serves as the main focus of this system because the potential for usability problems seems to be especially ...
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(2005)Designing a Learning Management System (LMS) is a combination of pedagogical design, usability and information architecture. E-Learning systems should have intuitive interfaces and clear information design, allowing ...
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(2005)Education service quality has become a major issue in higher education worldwide. In Greece it is beginning to gain attention in the last few years, mainly because it is an integral part of EU-funded programmes granted ...
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(2005)Telecommunications fraud is increasing dramatically each year resulting in loss of a large amount of euros worldwide. A statistical machine learning method is presented that constructs user profiles for the detection ...
Αποτελέσματα 1-20 από 332
