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The unique characteristics of the laser pulses as a processing tool in the field of high performance, solution processed and flexible bulk heterojunction organic solar cells (OSCs), as a case study in the research activities of the nanoelectronics & organic electronics research activities, are presented. The proposed techniques is strongly believed open new avenues towards the design and construction...
Aim of this work is the development of a competitive alternate design topology (in terms of power density) of a small permanent magnet dc (PMDC) motor found in automotive applications. Initially, a real industrial motor is measured, designed and simulated, while its measurements and the relevant manufacturer data are considered as a benchmark. In turn, through custom developed software, a redesigned...
The implementation of Management Information Systems (MIS) in educational management and administration is a relatively innovative field which is rapidly evolving because of its high efficiency and effectiveness. There is a relatively small number of research studies reported in the literature evaluating MIS implementations in universities. This case study focuses on the post-implementation evaluation...
Nowadays the propulsion electrification of ships is under intensive research. During this course, a very attractive option is the use of shaft electric machines, which is an intermediate step between the classic ship configuration and the all-electric one. However, two problems arise: (1) power dispatch should be carried out based on the Lagrange method or dynamic models, instead of simplistic methods...
In this paper it is described a new signal processing method to establish the best operating condition of a deterministic dynamic system, using nonlinear models related to wavelet transform and chaos theory. To validate the reliability and sensitivity of the method, it is applied to a C30 Capstone turbine by setting several rotational speeds of the turbine and by using mixed fuels.
In this paper a mathematical model for the whole control system (vehicle, steering gear and controller) is presented. The system was subjected to a few different optimization methods: Ultimate Sensitivity Tuning Method, Systematic Tuning Method, as well as a cost function (integral of quadratic dynamic error). This criterion is used to minimize a fuel consumption. Selection of the controller is examined...
With advances in computational processing power and commercial software combined with customized user-defined functions, Computational Fluid Dynamics (CFD) tools are now routinely used to produce a combined real time internal-external flow and heat transfer analysis, solve a wide range of building design problems and address a wide range of environmental impacts associated with the building sector...
In this paper are presented some analytical and numerical results regarding airfoil characteristics, lift coefficient improvement solutions and possible applications for airplane wing and helicopter blade. Starting from the general theory of aerodynamics and based on the CFD methods, the paper deals with the mathematical model of flow around an airfoil with a filed cavity, where a free rotational...
This paper deals with the modelling and flow simulation in the combustion chamber of a turbojet engine in order to find the optimal velocity, pressure and temperature distributions in the flame tube and in front of the turbine. The Arrhenius relationship, which describes the basic dependencies of the reaction rate on pressure, temperature and concentration has been used. Also, combustion efficiency...
We investigate the linear complexity and the minimal polynomial over the finite fields of sequences constructed on the basis of cubic residue classes. In particular, we find the linear complexity and the minimal polynomial of the characteristic sequence of cubic residue class and balanced cyclotomic sequences of order three.
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