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The rapidly growing population results in an increasing demand for much more residential and commercial buildings, which leads to vertical growth of the buildings and needs proper ventilation of those buildings. Natural air ventilation system is not sufficient for conventional building structures. Hence fans and air-conditioners are must to meet the requirement of proper ventilation as well as space...
Electricity, the most convenient form of energy is one of the most important issues in Bangladesh perspectives. It is very important to know the actual demand (i.e. if there were no load-shed) of electricity for proper planning and managing electricity generation. It will help the decision-makers to provide directions on cost-effective investment and on scheduling the operation of the power plants...
This article aims to present a design of MATLAB-Simulink based Photovoltaic (PV) module model simulation using a Level-2 MATLAB S-Function builder and controlled current source. The S-Function builder contains an algorithm based on the current-voltage relationship of a PV module. This PV module block is thus connected in series with four of them in order to investigate the behaviour of output characteristics...
It is necessary to make decisions depending on the behavior of buyers in the market to estimate the size of the enterprise and its market potential. Possible marketing activities in these conditions involve the increase in the value chain, incorporating into an integrated market system. The article provides information technology for using long-term and short-term marketing actions, as well as the...
The existing methods for the construction of Voronoi Diagram and the nearest neighbor query have several disadvantages. In view of the disadvantages, the new methods were studied in detail. To construct the Voronoi diagram effectively, the datasets were grouped in advance, and then the divide-and-conquer method combined with the increment method was used to generate Delaunay triangulation. By generating...
In this paper, a dynamic channel assigning along with dynamic cell sectoring model has been proposed that focuses on the Fractional Frequency Reuse (FFR) not only for interference mitigation but also for enhancement of overall system capacity in wireless networks. We partition the cells in a cluster into two part named centre user part (CUP) and edge user part (EUP). Instead of huge traffic, there...
Development of high quality license plate recognition system is a challenging task, not fully solved nowadays. License plate recognition process consists of the following steps: license plate detection, individual characters segmentation and recognition. This paper contains methods, connected with license plate allocation, segmentation and characters recognition. The noise on the plate and its angular...
Over the years, the Medium Access Control (MAC) protocols for wireless networks have considered direct-communication between source and destination. Although direct communication-oriented protocols have proven their efficiency, most of the cases suffer from unsuccessful communication. Therefore, Wireless Cooperative MAC concept has been evolved, where relay node(s) in between the source and destination...
We present a blind watermarking method in lifting wavelet transform (LWT) domain based on nonnegative matrix factorization (NMF) and singular value decomposition (SVD) for image copyright protection. The watermark image is preprocessed first using a Gaussian map in order to enhance the confidentiality. LWT is then applied to the original image to get sub-bands and the low frequency sub-band is divided...
Real-time facial expression analysis is an important yet challenging task in human computer interaction. This paper proposes a real-time person independent facial expression recognition system using a geometrical feature-based approach. The face geometry is extracted using the modified active shape model. Each part of the face geometry is effectively represented by the Census Transformation (CT) based...
In developing the ITP (induction thermal plasma) source for the thermal modification of micro-particles, it is crucial to comprehensively explore the effects of plasma torch dimensions, effects of plasma discharge conditions and particle parameters. Considering the plasma-particle interactions and particle loading impacts, a interactive flow model for argon-oxygen mixed-gas plasma is developed to...
Design of a microstrip array antenna to achieve dual circular polarization is proposed in this paper. The proposed antenna is a 2×2 array antenna where each patch element is circularly polarized. The feed network has microstrip lines, cross slot lines and air-bridges. The array antenna can excite both right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) without using...
Smoking is a life threatening bad habit which is known to a leading cause of lung cancer and cardiovascular diseases. The secretion level of vasopressin hormone is closely associated with the health impact of smoking. This study presents an analysis on vasopressin hormone secretion using Laser Doppler Flowmetry (LDF) technique in micro-vascular network. Using the blood perfusion unit (BPU) datagram...
A low profile, dual frequency probe-fed Microstrip antenna with E-shape radiating patch is designed and proposed for S-band and C-band applications. The purpose of this work is to obtain a dual frequency antenna with high gain and less return loss at the intended frequencies. The operating frequencies of the proposed antenna are 3.51 GHz and 5.82 GHz which are suitable for wider band of frequencies...
System of education in Russia is presently reforming. Accelerately developing educational technologies oriented to forming the habit of self-education and self-evolution of pupils require the up-to-date monitoring forms and methods which can be able to indicate the pupils' problem zones. Information system created and described by authors allows to process considerable data arrays of test answers...
Microdischarges are direct current discharges that operate at a relatively high pressure of about 10–1000 Torr and geometric dimensions in the several hundred micrometer ranges. Microhollow cathode sustained discharge (MCSD) is a particular type of microdischarges configuration that uses microhollow cathode discharge (MHCD) as an electron source for sustaining larger volume plasma. At high gas pressure,...
This paper aims at dispersing nanoscale Aluminium oxide (Al2O3) in Polyethylene/Ethylene Vinyl Acetate copolymer blends (PE/EVA) to improve the thermal conductivity of the composites. Blends of PE and EVA were prepared at different PE/EVA ratio, and PE/EVA blends with co-continuous structure were obtained. PE/EVA/Al2O3 composites were prepared by dispersing different amount of Al2O3 into co-continuous...
The rapid reduction of fossil fuel resources and environmental problem such as global warming has given consciousness on generation of renewable energy resources. Among the all renewable resources, wind energy is one of the prospective clean energy resources to provide reliable power supply with improved system efficiency. Wind turbine output is proportional to the cube of wind speed. On the other...
Biodiesel (BD) producing from various vegetable oils and animal fats are encouraging alternative fuels to diesel engine because of similar properties compared with standard diesel. The main objective of this review study is to detect influence on engine performance alteration when used BD blends to the diesel engine. The Brake Specific Fuel Consumption value significantly increasing when BD engine...
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