In the aeronautical current state of affairs, aerodynamic improvement in airfoil or in aircraft designs, including its configuration studies, remains to be the state-of-the-art research topics, which are being pursued by many aerodynamicists coming from high learning institutions, research agencies, or aircraft manufacturing industries. As part of the above general trends in aerodynamic activities, this ...

A novel fast locking Digital Phase-Locked Loop (DPLL) has been proposed with simple control unit to improve locking time. A Frequency Difference Stage (FDS) is added to produce a 3-bit code represents the difference between the input frequency and the output frequency of the PLL. This code is used to control a Programmable Charge Pump ...

Item set mining has been an active area of research due to its successful application in various data mining scenarios including finding association rules. Though most of the past paper has been on finding frequent item sets, infrequent item set mining has demonstrated its utility in web mining, bioinformatics and other fields. In this paper, ...

In this paper, the authors propose and analyses an efficient wireless telecommunication system with multiple antennas to the emission and reception MIMO (Multiple Input Multiple Output) with space diversity in an OFDM (Orthogonal Frequency Di vision Multiplex). The proposed system consists to add modified Alamouti encoder to the system OFDM to improve the performance of ...

Power electronic equipments reliable and stable operation, dc supply should be regulated. The regulation can be performed using buck, boost, Cuk, Flyback regulators. Except single phase rectifier with resistive load all other rectifiers input currents are non-sinusoidal in nature. This front end current distortion of rectifier converter leads to low power factor, high THD, distribution ...

The considerable increase of mobile device users in recent years causes a strong demand on secured wireless bank services and reliable mobile commerce (m-commerce) applications. Since mobile payment (m-payment) and banking is a critical part of most wireless information services and mobile commerce applications, how to build secured m-payment systems becomes a research hotspot. This ...

The idea of user satisfaction is not new. But how important it is in quality in use is new and under description. Satisfying the customers is an essential element to staying in business in this modern world of global competition. Software companies satisfy and even delight their customers with the value of their software products ...

The Quality of Service (QoS) research investigations in wired and wireless networks have been conducted mostly in isolation. Recently, a need for an end to end quality of service over hybrid networks (containing wired and wireless segments) has become evident. IEEE 802.11e work group has set up the standards for wireless network quality of service ...

In this paper, the authors compare the performance of the block linear equalizer used with the block data transmission system with that of the conventional linear transversal equalizer that is used with an uninterrupted continuous system. The result of the comparison show that the block data transmission system has some useful advantages over the continuous ...