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Now showing items 21-30 of 51
The influence of the electric field shape on the gas breakdown under low pressure and small inter-electrode gap conditions
(Ieee-Inst Electrical Electronics Engineers Inc, Piscataway, 2005)
The connection between nonhomogeneities of the electric field and the value of the breakdown voltage [direct current (dc), pulls] in gases (N-2, SF6) under low pressure and small inter-electrode gap was investigated in ...
Anomalous Paschen effect
(Ieee-Inst Electrical Electronics Engineers Inc, Piscataway, 2005)
The aim of this paper is to discuss the area left of the Paschen minimum, i.e., the area where the anomalous Paschen effect occurs. The experimental results and numerical simulation suggest a slightly different explanation ...
The influence of ideality factor on fill factor and efficiency of solar cells
(Trans Tech Publications Ltd, 2000)
The most important output characteristics of solar cells, fill factor and efficiency strongly depend on fundamental physical properties of semiconductor materials, such as mobility. lifetime of charge carriers, diffusion ...
Aging of the over-voltage protection elements caused by over-voltages
(Pergamon-Elsevier Science Ltd, Oxford, 2002)
The aim of this work is examining the influence of the number of the activation-over-voltage pulses to the aging of over-voltage protection elements. Both non-linear (gas-filled surge arresters (GFSA), varistors, over-voltage ...
Stress analysis in hydroxyapatite/poly-L-lactide composite biomaterials
(Elsevier, Amsterdam, 2001)
A three-dimensional (3D) finite element (FE) analysis of the stress concentration factor (SCF) in biocomposite model cell has been performed. The model composite consisted of a hydroxyapatite hard particle (HAp) embedded ...
Additional adjustment of the driver seat in accordance with the latest anthropometric measurements of drivers in Belgrade
(Professional Engineering Publishing Ltd, Bury St Edmunds, 2001)
This paper presents a sequel to research by two of the present authors published in 1998. In conditions of increasingly tough competition in the market, there is an increasing need to adjust automobiles to anthropomeasures. ...
Advanced three-dimensional two-fluid porous media method for transient two-phase flow thermal-hydraulics in complex geometries
(Taylor & Francis Inc, Philadelphia, 2002)
A three-dimensional two-fluid model for two-phase flow, within tube or rod bundles is presented. The porous media concept is applied in the model statement Closure laws for interfacial mass, momentum and energy transfer, ...
Maximizing multistage turbine efficiency by optimizing hub and shroud shapes and inlet and exit conditions of each blade row
(Walter de Gruyter GmbH, 2000)
By matching a well established fast through-flow analysis code and an efficient optimization algorithm, a new design system has been developed which optimizes hub and shroud geometry and inlet and exit flow-field parameters ...
New analytical HFET I-V characteristics model
(National Institute of Optoelectronics, 2006)
In this paper the new analytical model of current - voltage characteristics of a Heterostructure Field Effect Transistor (HFET), is proposed. The model is relatively simple, and at the same time, it describes complex HFET ...
Novel approach to the investigation of carriers' concentration in various semiconductor structures
(National Institute of Optoelectronics, 2006)
In this paper modern approach to the investigation of carriers' concentration applicable to various semiconductor structures has been developed. The model has exploited transport equation with the quantum correction term ...