Academic Research Publishing Agency Press
International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366

Volume 8, Issue 3 (September, 2011)

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1. MODELLING AND SIMULATION FOR NUCLEAR MATERIAL ACCOUNTING AND PROCESS MONITORING IN NUCLEAR SAFEGUARDS
by Tom Burr, Michael S. Hamada & John Howell
Abstract

Nuclear safeguards at inspected facilities aims to deter or detect special nuclear material (SNM) diversion and to do so is increasingly relying on process monitoring (PM) to augment nuclear material accounting (NMA). In NMA, SNM material balances are computed approximately every 30 days, and modeling and simulation are used to predict detector performance, to model SNM flows and inventory, and predict overall NMA performance as measured by the measurement error standard deviation of the material balance, sMB.  In PM, much more frequent and often short-cut measurements (less than full SNM accountability) are used, and modeling and simulation are increasingly used to predict the effects of SNM diversion on normal operating data under various scenarios. This paper reviews traditional modeling and simulation roles in NMA, describes new roles in PM, and illustrates using a case study.


2. ON SOME PROPERTIES OF DIVISORS OF ORDER K

by Nicusor Minculete & Claudiu Pozna

Abstract

The purpose of this paper is to present some properties about the arithmetic functions which use divisors of order K. We also study the mean value of some of them.


3. EPIDEMIOLOGICAL CONSEQUENCES OF NON-COMPLIANCE TO HCV THERAPY AMONG IDUS
by S. Mushayabasa & C.P. Bhunu
Abstract

Treatment for infections with hepatitis C viruses has recently developed markedly, and range from nonspecific interferon-based treatments to specific antiviral treatments, such as those that inhibit hepatitis virus coded protein production or activity. Despite advancements in the management of HCV, the epidemic prevalence continues to rise among injection drug misusers who, are responsible for approximately 90% of new HCV cases, because of their poor compliance with treatment requirements and conditions. A simple mathematical model is developed to explore the impact of treatment defaulting on the transimission dynamics of HCV among injection drug misusers. Numerical simulations are provided to support analytical findings.


4. KNOWLEDGE-BASED SCHEMA FOR S-BOX DESIGN
by Gabriela Moise
Abstract

In cryptography, a Substitution box (S-box) is one of the basic components of a symmetric key cryptography. Generally, it transforms a number of m input bits into n output bits. In this paper, there are presented the cryptographic properties of S-boxes and it is introduced a knowledge-based schema for building S-boxes.


5. USING DATA FROM SOCIAL MEDIA FOR MAKING PREDICTIONS ABOUT PRODUCT SUCCESS AND IMPROVEMENT OF EXISTING ECONOMIC MODELS
by Liviu Lica & Mihaela Tuta
Abstract

With the spectacular growth of social media, researchers now have access to a vast collection of opinions expressed by millions of people about every aspect of modern life. Using social networks as sources of publically available data about what consumers think about a multitude of subjects, it is possible to obtain various metrics that reflect the mood and interest of a costumer or user towards a certain product, service or organization. These metrics are a good starting point for making predictions about the success of the products or services they describe and a powerful parameter to be included in existing economic models. This paper reviews some of the most successful attempts of using data from social media to make predictions, discusses the strong points, difficulties and shortcomings of the approaches and presents a case study, created by the authors, that tests the assumptions of the reviewed researches. It ends with recommendations and suggestions for future researches.


6. ANY KIND OF COINCIDENTALLY COMMUTING MAPPINGS IN MENGER SPACE
by Abhishek Sharma, Arihant Jain & Sanjay Choudhari
Abstract

Here we prove a new fixed point theorem in Menger space. This is in line with research in fixed point theory using any kind of coincidentally commuting mappings and integral functions. Examples have also been constructed.


7. THE NULLSPACE OF NESTED MAGIC SQUARES
by Ayoub ElShokry & Saleem Al-Ashhab
Abstract

In this paper we formulate the general structure of the nullspace and subspaces of the nullspace for nested magic squares, where we consider two different types of centre. Further, we study the properties of these spaces.


8. NON-CENTRAL 7-POINT FORMULA IN THE METHOD OF LINES FOR PARABOLIC AND BURGERS' EQUATIONS
by H.O. Bakodah
Abstract

A suitable spatial discretisation with 7 point formula in the method of lines is introduced. It is shown that, this method is capable of solving some kinds of Burgers' equation and  comparisons are made with published analytic solutions .


9. ANN PREDICTION MODELS FOR MECHANICAL PROPERTIES OF AZ61 MG ALLOY FABRICATED BY EQUAL CHANNEL ANGULAR PRESSING
by Lakshmanan Singaram
Abstract

Artificial Neural Network (ANN) based prediction models are developed to predict the mechanical properties of AZ61 Mg alloy fabricated by equal channel angular pressing (ECAP). A back-propagation (BP) algorithm is used to train the neural network prediction models. Grain size, yield strength, and tensile strength of the alloy are predicted based on the number of ECAP passes. The ANN predictions are shown to be in excellent agreement with experimental results, and the prediction error is shown to be minimal. The main advantage of using these ANN prediction models is that they can be used to decide the optimal number of ECAP pressings required to achieve the desired mechanical properties. These models can also be extended in the future to predict other properties, and possibly characterize other alloys.


10. SPECTROPHOTOMETRIC ASSAY OF VALACYCLOVIR IN PHARMACEUTICAL DOSAGE FORMS
by J. sudhakar Reddy, Md.S. Maqsood Ahmed, I.E. Chakravarthi & K. Prabhavathi
Abstract

A simple and reproducible spectrophotometric method has been developed for the determination of valacyclovir in bulk and pharmaceutical dosage forms. The proposed method was based on the formation of chloroform extractable complex of valacyclovir with wool fast blue. The absorbance of the extractable ion pair complex is measured at the wavelength of maximum absorbance 585 nm against the reagent blank prepared under identical conditions. The proposed method was validated for its selectivity, linearity, accuracy, and precision. The method was found to be suitable for the quality control of valacyclovir in bulk drug as well as in formulation.


11. A REVIEW OF SOLAR THERMAL ELECTRICITY PRODUCTION
by Faouzi Nasri, Chaouki Ali & Habib Ben Bacha
Abstract

Problems related to the decrease of fossil energy, especially in its liquid form (oil) or gas (natural gas) and the stocks of uranium available for nuclear energy are now decrease. The burning of fossil resources causes the release of carbon dioxide (CO2) that accumulates in the atmosphere a greenhouse gas (GHG) which would change the balance of global climate. So that many research are interested for renewable energy in their different forms: wind, solar thermal, photovoltaic, hydro, biomass and geothermal, which now represent only 7.5% total world energy. The solar rays are an inexhaustible source of energy throughout the world. It is used in various applications as a source of clean and renewable energy. Indeed it is used in Desalination, air conditioning, cooking. Among this solar thermal applications include electricity generation. This paper reviews the electricity generation from solar thermal energy based specially on solar heated Rrankine cycle. Examples of solar thermal power plants will be discussed in this paper.


12. INFERENTIAL NETS UNDERLYING WORDS
by Mauricio Iza Mikeleiz & Alexandra Konstenius
Abstract

This work deals with how word meaning is represented by speakers of a language, reviewing psychological perspectives on the representation of meaning. Inferences about emotions are non-conscious responses whose main function is to direct attention and perception. The connection between non-conscious emotional responses and motivated attention was discovered through lexical decision tasks. Highly complex non-conscious interferences between emotion, cognition and lexico-semantic knowledge must therefore be assumed. Most probably affective processing interferes with subsequent lexico-semantic analysis along the ventral stream. In this paper we will discuss the empirical evidence concerning proto-emotions and the challenge for future research to, firstly, develop realistic models of the interfaces between emotion, cognition and lexical knowledge, and, secondly, to develop psycholinguistic methodology adequate to identify emotionally arousing semantic material.


13. A REVIEW OF SWEPT AND BLENDED WING BODY PERFORMANCE UTILIZING EXPERIMENTAL, FE AND AERODYNAMIC TECHNIQUES
by Hassan Muneel Syed, M. Saqib Hameed & Irfan A. Manarvi
Abstract

In this paper an effort is made for prediction of aerodynamic behavior of a BWB using design tools such as IFL, PrADO.  A set of wings was constructed by parametric variation on wing sweep. The CL, CD and Cm were investigated in steady state CFD of BWB at Mach 0.3 and through wind tunnel experiments on 1/6th model of BWB at mach 0.1. From CFD analysis pressure variation, Mach number contours and turbulence area was observed. Wing/fuselage thermal model was also investigated for stresses on wings and fuselage using nodal temperature derivation method at wing/fuselage interface. Elastic behavior of high-lift geometrically complex wing along with multiple components (flap, slat, weapons, pods etc) was studied. Also swept wing of a fighter aircraft was investigated using ANSYS and regions of high deflection, stress and strain were located.


14. IMPLEMENTATION OF THE BINARY CODING SCHEME AND THE TREE TRAVERSAL ALGORITHMS TO TEST FOR ANCESTOR-DESCENDANT RELATIONSHIPS IN K-ARY TREES
by Pervis Fly, Natarajan Meghanathan & Raphael Isokpehi
Abstract

This paper discusses the implementation of the binary coding scheme and its comparison with the post-order, pre-order and in-order traversal techniques to test for ancestor-descendant relationships in k-ary trees (a tree in which any leaf node has up to k children). The approach used is assigning a unique binary code to each node in a tree. The value of the binary code for a node is the concatenation of the code for its parent node (referred to as prefix) and the unique binary representation of the immediate children of the parent node (referred to as suffix). For any two nodes I and J, if the binary code of node I forms the prefix of the code of node J, then node I is the ancestor for node J; otherwise not. This method to test ancestor-descendant relationships has a time complexity of O(1), whereas the tree-traversals incur a complexity of O(n).


15. ON STATISTICAL ANALYSIS OF IMPACT OF SOCIO ECONOMIC FACTORS ON STUDENTS’ ACADEMIC PERFORMANCE
by O.M. Olayiwola, O. O. Salawu, I.F. Oyenuga, J. O. Oyekunle, O. A. Ayansola, J . T. Olajide & S. A. Agboluaje
Abstract

There are so many factors that can improve students’ academic performances and also so many factors that can lead to poor academic performance. With the results of the analysis and factors  under consideration, the following factors contribute positively to students’ academic performance: good parental background, adequate hostel facilities, good attitude to studies, adequate educational resources, good teaching methods and involvement in only one group discussion while  having many peer groups, bad attitude to studies, involvement in too much sport activities, too much  students’ enrolment, and involving in so many  group discussion bring about  reduction in students’ academic performance.


16. NUMERICAL SIMULATION OF AIR FLOW IN A GENERAL WARD OF A HOSPITAL
by Aditya Peri , Priam Mario Fernandes & Chandrashekhar Vishwanadha
Abstract

The need of precise determination of air flow pattern and temperature distribution in a room was realized by HVAC engineers to provide comfortable temperature conditions, Relative humidity and air velocities in the occupied space. Along with the thermal comfort, the indoor air quality control minimizes the spread of airborne respiratory and other infections in hospitals.

Simulation has been carried out on FLUENT code from ANSYS for different velocities of inlet air stream and different inlet air and wall temperatures i.e. for different Re and Gr. The geometry was meshed into small control volumes. Navier-Stokes equation, energy equation and k- equations in two and three dimensional rectangular Cartesian coordinates have been solved at the control volumes. The result obtained by above numerical procedure was validated by benchmark experimental result and has been found in close agreement with it.

The results of simulation of room without occupant revealed that there is drastic change in flow pattern for Gr/Re 2>=0.1, due to prominent effect of buoyancy. It is observed that that high inlet air velocities (>=2.5 m/s) are unsuitable as it causes non uniform temperature distribution and unnecessary energy utilization. The air flow pattern, temperature distribution and relative humidity contours for two dimensional flow with occupant indicate that thermal gradient due to human body temperature and body’s obstruction to flow cause significant change in flow as compared to that of an empty room. Results of  simulation of hospital general ward revealed that positioning of inlet vents as several fragmented vents along the centre of roof and outlet vent as a continuous vent along the roof on both the side edges directly above the patient bed is most suitable option, however this particular option is suitable for cooling purpose and is not prescribed when there is very less temperature difference between outside temperature and inlet air temperature i.e. Gr≈0, as for very low value of Gr contaminant is seen to be recirculating and exits the ward after very long period of time.














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