Volume 4, Issue 1, January 2013

Enhancing Decision Making Capability Using Ontological Approach for Polymyalgia Rheumatica

Murtaza Hussain Shaikh, Munazza Ahsan Shaikh, Noor Ahmed Ansari and Mahreen Jurial Khan

Member IEEE, Norway
Department of Medicine Unit-IV (LUH), Liaquat University of Medical & Health Sciences, Pakistan
London College of International Business Studies, London, United Kingdom
Institute of Information and Communication Technology, University of Sindh, Pakistan

Abstract– These days, the health informatics is gaining popularity in solving some of the major issues faced in health systems. The key aspect governing this is to facilitate decision based mechanism from already existing knowledge. Ontologies can be used in this regard to conceptually define various formalisms and thereupon extracting new knowledge from it. The results fetched from ontology’s can be used to find some new solutions or preventive measures. In this paper we have investigated use of ontology for Polymyalgia Rheumatica (PMR) using Protégé ontology language. The results from ontology assisted to draw some conclusions for providing some counter measures to PMR. The ontology is also flexible to extend to other related domains and comprehensive problem analysis can be performed. Undeniably, PMR is among the most common reasons for long-term steroid prescription with great heterogeneity.

Keywords— Ontology; Primarily, Polymyalgia-Rheumatica, Syndrome, Properties, Domain, Modeling, Disease and Diagnosis

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Characteristics of a Designed 1550 nm AlGaInAs/InP MQW VCSEL

Raja Rashidul Hasan and Rinku Basak

Assistant Engineer of Development Design Consultants Limited, Mohakhali, Dhaka-1212, Bangladesh
Assistant Professor and Head (Graduate Program), Department of EEE, Faculty of Engineering, American International University-Bangladesh (AIUB), Banani, Dhaka-1213, Bangladesh

Abstract– The vertical-cavity surface-emitting laser (VCSEL) is becoming a key device in high-speed optical local-area networks (LANs) and even wide-area networks (WANs). In this work, the design and characteristics of a 1550 nm Multi Quantum Well (MQW) VCSEL using AlGaInAs/InP Materials have been obtained through computation and simulation using MATLAB simulation Tool. The obtained characteristics have been analyzed for obtaining better performance. For achieving a superior performance, the concentrations of AlGaInAs QW material have been chosen using the results of another research works. The material gain of the Al0.09Ga0.38In0.53As/InP MQW VCSEL has been theoretically computed. Using the peak material gain obtained from this computation the performance characteristics of the designed VCSEL have been obtained. At 300K, the threshold current of the VCSEL has been obtained as 0.6075 mA. A maximum output power of 1.02 mW has been obtained for this designed VCSEL at 8.5 mA injection current. Corresponding to this the modulation bandwidth has been obtained as 14.2 GHz which indicates a high speed performance of the designed VCSEL for applications in optical fiber communication. Further by increasing the injection current up to 16.5 mA a maximum bandwidth is obtained as 19.5 GHz.

Keywords— Bandwidth, MQW, VCSEL and Laser Diode

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jUniGrid: A Simplistic Framework for Integration of Mobile Devices in Heterogeneous Grid Computing

Ketan B. Parmar, Nalinbhai N. Jani, Pranav S. Shrivastav and Mitesh H. Patel

Department of Computer Sicence, Kadi Sarva Vishwavidyalaya, Gandhinagar–382015, Gujarat, India
Chemistry Department, School of Sciences, Gujarat University, Navrangpura–380009, Gujarat, India

Abstract– While inclusion of mobile devices into grid computing provides numerous advantages, the current implementations are either too complex or too specific, hence, cannot often be used efficiently by small to medium scale organizations. Further, diversity of platforms & development environments and virtual non-existence of high-end mobile devices until last few years were some of the hindrances in the path of incorporating mobile devices in real world grids. To address these lacunae, herein we introduce a new simplistic framework “jUniGrid” for integrating mobile devices as workstations in heterogeneous grid computing (desktop volunteer grid computing systems, DGVCS) to be used for performing high complexity computational problems. jUniGrid is a flexible grid architecture designed to deploy java-enabled devices (mobile or otherwise) as grid-nodes.

Keywords— Desktop Grid, Volunteer Computing, Grid Computing, Mobile Grid, Android Mobile, Heterogeneous Grid, DGVCS and M/DGVCS

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Various Volume Fractions Laws for a Functionally Graded Cylindrical Shell under Hamilton's Principle

Mohammad Reza Isvandzibaei

Department of Mechanical Engineering, Andimeshk Branch, Islamic Azad University, Andimeshk, Iran

Abstract– Study of the vibration of thin cylindrical shells made of a functionally gradient material (FGM) composed of stainless steel and nickel is very important. The objective is to study the natural frequencies and the effects boundary conditions on the natural frequencies of the functionally graded cylindrical shell. The study is carried out using third order shear deformation shell theory (T.S.D.T). The analysis is carried out using Hamilton’s principle. The governing equations of motion of functionally graded cylindrical shells are derived based on T.S.D.T theory. Results are presented on the frequencies with various power law exponents.

Keywords— Volume Fraction, Frequencies and Law Exponent

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Decolourization of Palm Oil by Nigerian Local Clay: A Study of Adsorption Isotherms and Bleaching Kinetics

J. T. Nwabanne and F. C. Ekwu

Department of Chemical Engineering, Nnamdi Azikiwe University, P.M.B. 5025, Awka, Nigeria
Department of Food Science and Technology, Ebonyi State University, Abakiliki, Nigeria

Abstract– The Mechanism of decolourization of crude palm oil using local clay obtained from Nteje town in Anambra State, Nigeria was studied in order to understand the bleaching mechanism. The raw clay was characterized to determine its properties. Chemical activation of the clay was done using sulphuric acid. The effect of parameters such as time, temperature, particle size and dosage on the bleaching of palm oil was investigated. It was found that bleaching efficiency increased with increase in time, temperature and dosage, and decreased with increase in particle size. Langmuir and Freundlich models were used to study the adsorption mechanism. The adsorption data conformed to Freundlich isotherm. The heat of adsorption was determined as 35.6KJmol-1 which showed that bleaching process was chemisorption. The rate constant was evaluated as 1.552, indicating that there is a high rate of adsorption during the bleaching of palm oil.

Keywords— Clay, Palm Oil, Bleaching, Adsorption Isotherm and Kinetics

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Mobile Grid Computing: Facts or Fantasy?

Ketan B. Parmar, Nalinbhai N. Jani, Pranav S. Shrivastav and Mitesh H. Patel

Department of Computer Sicence, Kadi Sarva Vishwavidyalaya, Gandhinagar–382015, Gujarat, India
Chemistry Department, School of Sciences, Gujarat University, Navrangpura–380009, Gujarat, India

Abstract– The growing availability of networked mobile devices has created a vast collective pool of unexploited computing resources. In this paper we analyze the challenges for harvesting this potential for grid computing. The inherent limitations of typical mobile devices, such as reduced CPU performance, small secondary storage, heightened battery consumption sensitivity, and unreliable low-bandwidth communication are outraced by number of smart-phones sold annually, suggesting that the concept should not be prematurely dismissed. Given the enormous benefits of mobile grid computing, solutions to compensate for the inherent limitations of these devices must be developed in order to successfully utilize them in the Grid.

Keywords— Grid Computing, Mobile Wireless Computing, Pervasive Computing and Network Clusters

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