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Search Results: 1 - 10 of 381 matches for " Rafi Chaudhury "
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Feasibility and Implications of a Monetary Union in Southeast Asia
Rafi Chaudhury
Michigan Journal of Business , 2009,
Abstract: This study explores the readiness of seven ASEAN countries to adopt a common monetary policy and introduce a common currency. The suitability of the region as an Optimum Currency Area is estimated using an OCA Index developed in Bayoumi & Eichengreen (1997). This study finds that while the countries studied appear to be prepared to adopt a common monetary policy, there are still many opportunities to exploit policy independence in order to improve infrastructure and competitiveness prior to further integration.
A Dual-Model Approach to Measuring Income Convergence Sustainability in European and Asian Emerging Economies
Rafi Chaudhury
Michigan Journal of Business , 2010,
Abstract: The 'tiger' economies of Southeast Asia and the transition economies of Central and Eastern Europe have encountered both rapid growth and considerable upheaval in the past two decades. This study examines the extent to which the two regions have converged to industrialized-country levels of per capita income growth, using the convergence criteria defined in Sala-i-Martin (1996), for the 1992-2007 period. The sustainability of convergence going into the future is estimated using a variant of the balance of payments constrained-growth theory developed in Thirlwall (1979). My findings suggest that both regions exhibit fairly rapid convergence, which is likely to continue in the future due to favorable export demand elasticities, technological diffusion, and total factor productivity.
Algorithmic Optimization of BDDs and Performance Evaluation for Multi-level Logic Circuits with Area and Power Trade-offs  [PDF]
Saurabh Chaudhury, Anirban Dutta
Circuits and Systems (CS) , 2011, DOI: 10.4236/cs.2011.23031
Abstract: Binary Decision Diagrams (BDDs) can be graphically manipulated to reduce the number of nodes and hence the area. In this context, ordering of BDDs play a major role. Most of the algorithms for input variable ordering of OBDD focus primarily on area minimization. However, suitable input variable ordering helps in minimizing the power consumption also. In this particular work, we have proposed two algorithms namely, a genetic algorithm based technique and a branch and bound algorithm to find an optimal input variable order. Of course, the node reordering is taken care of by the standard BDD package buddy-2.4. Moreover, we have evaluated the performances of the proposed algorithms by running an exhaustive search program. Experi-mental results show a substantial saving in area and power. We have also compared our techniques with other state-of-art techniques of variable ordering for OBDDs and found to give superior results.
Students’ Self-Diagnosis Using Worked-Out Examples  [PDF]
Rafi’ Safadi, Edit Yerushalmi
Creative Education (CE) , 2013, DOI: 10.4236/ce.2013.43031
Abstract: Students in physics classrooms are often asked to review their solution to a problem by comparing it to a textbook or worked-out example. Learning in this setting depends to a great extent on students' inclination forself-repair; i.e., their willingness and ability to recognize and resolve conflicts between their mental model and the scientifically acceptable model. This study examined the extent to which self-repair can be identified and assessed in students’written responses on a self-diagnosis task in which they are given time and credit for identifying and explaining the nature of their mistakes assisted by a worked-out example. Analysis of 180 10th and 11th grade physics students in private and public schools in the Arab sector in Israel showed that although most students were able to identify differences between their solution and the worked-out example that significantly affected the way they approached the problem many did not acknowledge the underlying conflicts between their interpretation and a scientifically acceptable interpretation of the concepts and principles involved. Rather, students related to the worked-out example as an ultimate template and simply considered their deviations from it as mistakes. These findings were consistent in all the classes and across all the teachers, irrespective of grade level or school affiliation. However, younger students in some classrooms also perceived the task as a communication channel to provide feedback to their teachers on their learning and the instructional materials used in the task. Taken together, the findings suggest that instructional intervention is needed to develop students’ ability to self-diagnose their work so that they can learn from this type of task.


Characteristics of “Exemplary Teachers” and Possible Factors Affecting Their Realization According to the Perception of Principals from the Arab Sector in Israel  [PDF]
Salman Ilaiyan, Rafi’ Safadi
Creative Education (CE) , 2016, DOI: 10.4236/ce.2016.71012
Abstract: This study examines the characteristics of exemplary teachers and the factors that are liable to inhibit/encourage their realization according to the perception of principals from the Arab sector in Israel. Ten principals were interviewed. They considered leading educational initiatives, coping with discipline problems, subject matter mastery, and employing a variety of teaching methods to be the exemplary teacher’s outstanding characteristics. Characteristics associated with ongoing professional development and relationships with colleagues, pupils, and parents were deemed less prominent. The principals did not manifest a unified stance vis-à-vis whether their schools’ physical-pedagogical infrastructure encouraged or inhibited the realization of the characteristics of exemplary teaching. It was recommended that in parallel to broadening didactic and disciplinary knowledge, it would be worthwhile fostering the ability of the teachers, in particular pre-service teachers and beginning teachers, to lead educational initiatives and establish interpersonal relationships, and giving them tools for coping with discipline problems.
Reporting for cryptosporidium species in routine stool microscopy
Chaudhury A
Indian Journal of Medical Microbiology , 2001,
Abstract:
In vitro activity of cefpirome: A new fourth generation cephalosporin
Chaudhury A
Indian Journal of Medical Microbiology , 2003,
Abstract: This study was carried out to find the efficacy of Cefpirome in an Indian setting in a tertiary care referral hospital. A total of 516 bacterial isolates from various clinical specimens were tested against cefpirome (Cpo) and compared against the activities of three other cephalosporins, namely cefazolin (Cz), cefuroxime (Cu), and cefotaxime (Ce) as representative of the other three generations. Preliminary testing was done by Kirby Bauer technique. In the gram positive group of organisms (Staphylococcus aureus and coagulase negative staphylococci); 96 strains out of 177 (54.2%) were resistant to Cpo compared to 61.0% for Cz and 72.3% for Cu. In the Enterobacteriaceae group, 66.0% of the isolates were resistant to Cpo compared to 63.2% for Ce; while for Pseudomonas and other non-fermentors, the corresponding figures were 70.7% and 50.0% for Cpo and Ce respectively. The MIC for the strains resistant to Cpo were found to be >16mg/L to >256mg/L. This study highlights that Cpo did not have superior activity against the organisms isolated in our laboratory. However, since its activity against gram positive and gram negative organisms is comparable to those of Cz and Ce respectively, it may be useful for mixed infections for empirical therapy.
Hand on Head Sign: A New Clinical Sign
Chaudhury AR
Indian Journal of Physical Medicine and Rehabilitation , 2010,
Abstract: Description of a new sign in Cervical Radiculopathy.
Molecular Handoffs in Nitrergic Neurotransmission
Arun Chaudhury
Frontiers in Medicine , 2014, DOI: 10.3389/fmed.2014.00008
Abstract: Postsynaptic density (PSD) proteins in excitatory synapses are relatively immobile components, while there is a structured organization of mobile scaffolding proteins lying beneath the PSDs. For example, shank proteins are located further away from the membrane in the cytosolic faces of the PSDs, facing the actin cytoskeleton. The rationale of this organization may be related to important roles of these proteins as “exchange hubs” for the signaling proteins for their migration from the subcortical cytosol to the membrane. Notably, PSD95 have also been demonstrated in prejunctional nerve terminals of nitrergic neuronal varicosities traversing the gastrointestinal smooth muscles. It has been recently reported that motor proteins like myosin Va play important role in transcytosis of nNOS. In this review, the hypothesis is forwarded that nNOS delivered to subcortical cytoskeleton requires interactions with scaffolding proteins prior to docking at the membrane. This may involve significant role of “shank,” named for SRC-homology (SH3) and multiple ankyrin repeat domains, in nitric oxide synthesis. Dynein light chain LC8–nNOS from acto-myosin Va is possibly exchanged with shank, which thereafter facilitates transposition of nNOS for binding with palmitoyl-PSD95 at the nerve terminal membrane. Shank knockout mice, which present with features of autism spectrum disorders, may help delineate the role of shank in enteric nitrergic neuromuscular transmission. Deletion of shank3 in humans is a monogenic cause of autism called Phelan–McDermid syndrome. One fourth of these patients present with cyclical vomiting, which may be explained by junctionopathy resulting from shank deficit in enteric nitrergic nerve terminals.
Similarity in Transcytosis of nNOSα in Enteric Nerve Terminals and Beta Cells of Pancreatic Islet
Arun Chaudhury
Frontiers in Medicine , 2014, DOI: 10.3389/fmed.2014.00020
Abstract:
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