Software engineering is an engineering approach for software development. In order to develop large software several phases has to be followed by the developer to achieve good quality software; cost effectively. System Design is the most important activity in software development which reflects reusability. System Design specifies what a new or modified system is going to do. To achieve good quality software, the primary characteristics of neat module decomposition are low coupling {data coupling}, high cohesion {functional cohesion} and top-down approach has to be followed. We applied these principles on developing Online Attendance System and observed reusability of code. The system has been successfully tested in our institute. Effective design principles always lead to an effective reusability which in turn benefited with Return on Investment (ROI).

In this work, we consider a class of formulae for the numerical solution of IVP, in ordinary differential equations with point of singularity, in which the underlying interpolant is a rational function. This is in contrast with the classical formulae which are in general based on polynomial approximation. The proof of convergence and consistency for the scheme are also given. There are two parameters that control the position and the nature of singularity. The values of these parameters are automatically chosen and revised, during the computation.

In [4], the definition of product summability method (𝑫𝑫𝑫𝑫,𝒌𝒌𝒌𝒌)(C,l) for functions was given and some of its properties were investigated. In [2], summability for functions are defined and some of its properties are investigated. In this paper summability for sequences are defined and some of its investigated.

Nowadays influencing consumer behaviours is very important for companies which aims to be succesful in such an intense competetive environment. To cope with intense competetion and to influence consumer behaviours is inevitable for companies to consider cultural, social, psychologic and, personal status of consumers. main aim of the companies is to profit. Therefore companies should understand behaviours of their consumers to keep the permanency of the situation, to keep their customers and to keep their customers to buy. In this study, factors affecting the consumers’ behaviours such as age and life times, occupation, life style and personality are studied. This study investigates how personal factors affect consumer behaviors in Poland with the participation of 500 people in the provinces through interviews. The obtained data are interpreted quantitatively.

This paper discuss the Low Complexity Post-Coded MIMO OFDM (PC-MIMO OFDM) Systems: Design and performance analysis. The signal is propagating from the transmitter to receiver along number of different paths, referred as multipath in wireless environment. Path loss, macroscopic fading and microscopic fading are propagating signal power drops. Orthogonal Frequency Division Multiplexing (OFDM) provides a viable solution to communicate over selective fading channels. OFDM offers several advantages like resilience to multipath fading in intersymbol interference, low complexity and others. Multiple input multiple output (MIMO) utilizes spatial diversity by having several transmit and receive antennas. The combination of MIMO and OFDM has been designed to improve the data rate and Quality of service (QoS) .The wireless system utilizes the multiplexing gain and/or diversity gain which is a major problem in communication. The combination MIMO-OFDM is very natural and beneficial, since OFDM enables support of more antennas and large bandwidths. Coded or precoded OFDM systems are generally employed to overcome the symbol recovery problem in uncoded OFDM systems. The post coded OFDM systems introduce frequency diversity by manipulating the OFDM systems in time domain so that the computational complexity of the system can be significantly reduced. We discuss the design principle of PC-MIMO OFDM system transmitter that uses up sampling operation and spreading codes to introduce frequency diversity .We also describe the design of low complexity receiver for PC-MIMO OFDM systems to minimize error performance. The main advantages of this scheme are reduce system complexity by having a simple encoder/decoder ,smaller size inverse fast Fourier transform/fast Fourier transform (IFFT/FFT)modules, and lower clock rates in the receiver and transmitter leading to be lower energy consumption. The proposed system is found to be equally good over Gaussian and Fading channels where it achieves

Competition in component market and short time to market the software components forces the organization to develop and launch the components in an iterative manner. Components are launched in various versions. All gathered requirements cannot be implemented in initial version. So requirements need to be prioritized and implemented in subsequent versions. Similarly defects in one version are taken care of in subsequent versions. In the present work we have proposed a simulation model that can be used to study the operational characteristics of the requirements implementation process and defect removal process in a Component Based Software.

This paper presents a general system for the reconstitution of natural flows series to support the SNIRH (Brazilian acronym for National Water Resources Information System). There is a need for system structuring due to the fact that streamflows may suffer human modifications which difficult to carry out water resources management. In order to make a reliable assessment, it is essential to determine the socalled “natural flow series” i.e. the flows that would have occurred prior to human action. The SisVazNat system was applied in the Tocantins watershed, located in the Amazon Region, and in order to validate the proposed methodology, the results were compared with those published by the Electric System National Operator (ONS). The mean percent differences obtained in each hydropower plant were, respectively: UHE Serra da Mesa (3.2%); UHE Cana Brava (5.6%); UHE Lajeado (4.2%) and UHE Tucuruí (4.4%), allowing the validation of the tool.

Natural gas is considered as one of the most popular source of energy in recent era and future as well. However, raw natural gas usually contents several of nonhydrocarbon components for instance, hydrogen sulphide and carbon dioxide. Indeed, these impurities are undesirable compounds and cause many problems for example, corrosion and environment pollution. Moreover, amine gas sweetening process is considered the most popular technology to remove acid gases from natural gas stream. However, when the hydrocarbons reservoir pressure declines, new wells are drilled to maintain production and enhanced oil recovery methods are also applied at the end age of the reservoir. As a result, the declining of the reservoir pressure leads to decline the operation pressure for the amine contactor tower and it may lead to significant effects on gas sweetening process efficiency and performance. Therefore, this study aims to simulate gas-sweetening process for given raw natural gas stream that it contents high quantity of acid gases by using Aspen HYSYS simulator program and then examine the effects of declining reservoir pressure on the sweetening process. The case study gas stream operation pressure is about 7000 Kpa. However, the study found that when the sour gas pressure declined that will effect acid gases loading in amine solution.

The main object of this paper is to obtain some integrals and series relation pertaining to biorthogonal polynomials, Fox’s H-function, the general class of polynomials and the H-function of several complex variables.

Due to aggressive scaling of transistors SCEs has become the limiting factor for further scaling of the conventional MOSFETs. To overcome this limitation a large number of new device architectures have been proposed. One of such device structures is cylindrical gate all around (CGAA) MOSFET that seems to be most suitable to be studied further for different applications point of view. In this paper we report the suitability analysis of CGAA MOSFETs for low voltage, low power and analog applications. We report many interesting findings through 3D TCAD simulations of CGAA MOSFETs.