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Search Results: 1 - 10 of 757 matches for " Fahim Faisal "
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A Novel Topology of Single-Phase AC-DC Integrated Boost-SEPIC (IBS) Converter Using Common Part Sharing Method (CPSM) for High Step-Up Applications  [PDF]
Mohammad Bazlur Rashid, Mohammad Abdul Moin Oninda, Fahim Faisal, Mirza Muntasir Nishat, Golam Sarowar, Md. Ashraful Hoque
Journal of Power and Energy Engineering (JPEE) , 2018, DOI: 10.4236/jpee.2018.66003
Abstract: A novel topology of Integrated Boost-SEPIC (IBS) AC-DC converter using common part sharing method (CPSM) has been proposed in this paper. Conventional boost converters with bridge rectifier configuration are inefficient due to limited voltage step-up ratio which may not be applicable for high step-up applications as in the case of micro generators. The proposed IBS topology is based on the common part sharing method capable of operating both for positive and negative half cycle of the input signal. Result and simulation were conducted using PSIM environment. The proposed AC-DC IBS topology eliminates the requirement of bridge rectifier achieving high efficiency (about 99%), improved power factor (0.75, leading) and lower THD (about 38.8%) which is within IEEE standard.
The Difference between Formative Assessment through Multiple Choice Questions and True False Questions in Iranian Intermediate EFL Learners' Grammar Learning
Mansoor Fahim,Farnoosh Fahim
Theory and Practice in Language Studies , 2011, DOI: 10.4304/tpls.1.7.906-911
Abstract: Assessment is a prominent topic including everything from large scale tests to district benchmark or interim tests to everyday classroom tests. In order to discover what seems to be an overuse of testing, educators should frame their views of testing as assessment and that assessment is getting information rather than making learners stressed. The more we know about the students, the clearer the picture we have about achievement or where gaps may occur. This study attempts to find the difference between using multiple choice type of quizzes and true/false type of quizzes as means of formative assessment in teaching intermediate adult students. What we exactly tried to do was checking that whether learners can improve their knowledge of grammar and have better results in their achievement test based on different exam types they take during the term and in the class. The findings showed that there was no significant difference between the learners exposed to multiple-choice exams and those who were given true/false tests. The type of exam which was used for final exam was even a multiple choice one but this did not lead to a significantly better performance for the ones who had the same exam type during the instructional sessions.
Application of Perfect Difference Codes in Wireless Infrared Systems  [PDF]
Fahim A. Umrani, Salah Obayya
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.38090
Abstract: In this paper, we apply the perfect difference codes in wireless infrared systems considering the diffuse indoor optical wireless configuration. The bit error rate performance of the uplink wireless infrared system using Gaussian approximations is analyzed taking into account the effects of multiple-access interference, the ambient light noise, and the dark current. The proposed system also uses the compact encoder and decoder architecture resulting in a low cost system.
The Relationship between Self-Esteem and Paragraph Writing of Iranian EFL Learners  [PDF]
Mansoor Fahim, Somaye Khojaste Rad
Psychology (PSYCH) , 2012, DOI: 10.4236/psych.2012.31004
Abstract: The present study is an attempt to understand the relationship between self-esteem and paragraph writing of Iranian EFL learners. The study was conducted on both Iranian male and female senior EFL learners studying at Tonekabon and Lahijan Azad Universities. To start the project, first of all, the researcher ran the TOEFL test among 80 students. Then, the Self-esteem Coopersmith inventory was given to the same subjects, after that the researcher asked them to write three different kinds of paragraphs in three forms namely; descriptive, comparison/contrast and cause/effect. However, the last two stages were administered in one session by one week interval. Needless to say, the researcher was available in the class in order to eliminate probable misunderstanding while the subjects were completing all three above-mentioned stages. Finally, in order to come up with the result, the correlation related to the four questions was mea- sured by Pearson-product moment formula, thus, the results of the calculation of correlation coefficient showed a correlation between variables of each question. Based on the above-mentioned results the null hypotheses of this study were all rejected. Meanwhile, the consistency of the raters was calculated by α- Chronbach index showing a high reliability among all raters.
Fahim Ahmed
Molecules , 2001, DOI: 10.3390/m270
Abstract: No abstract available
2-Cinnamyl-1,3-oxazole-4-carboxaldehyde p-Toluenesulfonyl Hydrazone
Fahim Ahmed
Molecules , 2001, DOI: 10.3390/m269
Abstract: No abstract available
Measuring Bank Ad Effectiveness
Fahim Nizam
Market Forces , 2006,
State of Art Review on Tribology of Carbon Nanotubes Filled Polymer Nanocomposites
Mohammed Fahim
Journal of Scientific Review , 2011,
Abstract: Development and tribological characterization of polymer nanocomposites, derived from carbon nanotubes (CNTs) filled tribologically significant engineering polymers, is a growing area of research in tribology. This is based on the preliminary investigations that show CNTs as a promising filler to enhance friction and wear performance of base polymers. However, the research is still in the formative stages and more work needs to be done to resolve three major issues that challenge the optimum utilisation of the properties of CNTs. Firstly, deagglomeration of CNTs and their uniform dispersion in the polymer matrix is a big challenge. Secondly, the interaction of CNTs with polymer matrix needs to be improved using proper functionalization of the former. In fact functionalised CNTs have been explored, the preliminary results, however, have not been very encouraging. Thirdly, the mass production of such composites using industrial moulding processes poses another challenge. This overview presents the state of the art review of research papers available on the subject. It has been observed that the role of CNTs in influencing the wear and friction behaviour, either as lubricating wear debris or as abrasives is still debatable and remains a major issue that needs to be resolved.
A Probabilistic Scheme for Fully Nonlinear Nonlocal Parabolic PDEs with singular Lévy measures
Arash Fahim
Mathematics , 2010,
Abstract: We introduce a Monte Carlo scheme for fully nonlinear parabolic nonlocal PDE's whose nonlinearity in of Hamilton-Jacobi-Bellman-Isaacs (HJBI for short). We avoid the difficulties of infinite L\'evy measure by truncation of the L\'evy integral. The first result provides the convergence of the scheme for general parabolic nonlinearities. The second result provides bounds on the rate of convergence for concave (or equivalently convex) nonlinearities. For both results, it is crucial to choose truncation of the infinite L\'evy measure appropriately dependent on the time discretization. We also introduce a Monte Carlo Quadrature method to approximate the nonlocal term in the HJBI nonlinearity.
Requirements Analysis: Evaluating KAOS Models  [PDF]
Faisal Almisned, Jeroen Keppens
Journal of Software Engineering and Applications (JSEA) , 2010, DOI: 10.4236/jsea.2010.39101
Abstract: Wigmore’s charts and Bayesian networks are used to represent graphically the construction of arguments and to evaluate them. KAOS is a goal oriented requirements analysis method that enables the analysts to capture requirements through the realization of the business goals. However, KAOS does not have inbuilt mechanism for evaluating these goals and the inferring process. This paper proposes a method for evaluating KAOS models through the extension of Wigmore’s model with features of Bayesian networks.
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