oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 237 )

2018 ( 329 )

2017 ( 341 )

2016 ( 515 )

Custom range...

Search Results: 1 - 10 of 227198 matches for " R. Rahman "
All listed articles are free for downloading (OA Articles)
Page 1 /227198
Display every page Item
Implications and reflections on the 2010 Supreme Court ruling on Canada's AHR Act
Deonandan R, Rahman T
International Journal of Women's Health , 2011, DOI: http://dx.doi.org/10.2147/IJWH.S27145
Abstract: ations and reflections on the 2010 Supreme Court ruling on Canada's AHR Act Commentary (2600) Total Article Views Authors: Deonandan R, Rahman T Published Date November 2011 Volume 2011:3 Pages 405 - 408 DOI: http://dx.doi.org/10.2147/IJWH.S27145 Raywat Deonandan, Tarun Rahman Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada Abstract: In December, 2010, Canada's 6 year old Assisted Human Reproduction Act was successfully challenged in the Supreme Court of Canada. There may be important implications for public health and the evolution of reproductive technologies in this country.
Time-Domain Techniques for Computation and Reconstruction of One-Dimensional Profiles
M. Rahman,R. Marklein
Advances in Radio Science : Kleinheubacher Berichte , 2005,
Abstract: This paper presents a time-domain technique to compute the electromagnetic fields and to reconstruct the permittivity profile within a one-dimensional medium of finite length. The medium is characterized by a permittivity as well as conductivity profile which vary only with depth. The discussed scattering problem is thus one-dimensional. The modeling tool is divided into two different schemes which are named as the forward solver and the inverse solver. The task of the forward solver is to compute the internal fields of the specimen which is performed by Green’s function approach. When a known electromagnetic wave is incident normally on the media, the resulting electromagnetic field within the media can be calculated by constructing a Green’s operator. This operator maps the incident field on either side of the medium to the field at an arbitrary observation point. It is nothing but a matrix of integral operators with kernels satisfying known partial differential equations. The reflection and transmission behavior of the medium is also determined from the boundary values of the Green's operator. The inverse solver is responsible for solving an inverse scattering problem by reconstructing the permittivity profile of the medium. Though it is possible to use several algorithms to solve this problem, the invariant embedding method, also known as the layer-stripping method, has been implemented here due to the advantage that it requires a finite time trace of reflection data. Here only one round trip of reflection data is used, where one round trip is defined by the time required by the pulse to propagate through the medium and back again. The inversion process begins by retrieving the reflection kernel from the reflected wave data by simply using a deconvolution technique. The rest of the task can easily be performed by applying a numerical approach to determine different profile parameters. Both the solvers have been found to have the ability to deal with different types of slabs and incident electromagnetic pulses. Slabs having continuous and discontinuous relative permittivity have already been tested successfully. The tested electromagnetic pulses are a Dirac, Gaussian and sinusoidal pulse. Due to sampling, the resolution of the system also plays a significant role in obtaining better outputs from this scheme.
Implications and reflections on the 2010 Supreme Court ruling on Canada's AHR Act
Deonandan R,Rahman T
International Journal of Women's Health , 2011,
Abstract: Raywat Deonandan, Tarun RahmanInterdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, CanadaAbstract: In December, 2010, Canada's 6 year old Assisted Human Reproduction Act was successfully challenged in the Supreme Court of Canada. There may be important implications for public health and the evolution of reproductive technologies in this country.Keywords: public health, reproductive medicine, IVF, ART, in vitro fertilization (IVF)
Evaluation of the use of partition coefficients and molecular surface properties as predictors of drug absorption: a provisional biopharmaceutical classification of the list of national essential medi
R Shawahna,NU Rahman
DARU : Journal of Pharmaceutical Sciences , 2011,
Abstract: Background and the purpose of the study: Partition coefficients (log D and log P) and molecular surface area (PSA) are potential predictors of the intestinal permeability of drugs. The aim of this investigation was to evaluate and compare these intestinal permeability indicators. Methods: Aqueous solubility data were obtained from literature or calculated using ACD/Labs and ALOGPS. Permeability data were predicted based on log P, log D at pH 6.0 (log D6.0), and PSA. Results: Metoprolol's log P, log D6.0 and a PSA of <65 correctly predicted 55.9%, 50.8% and 54.2% of permeability classes, respectively. Labetalol's log P, log D6.0, and PSA correctly predicted 54.2%, 64.4% and 61% of permeability classes, respectively. Log D6.0 correlated well (81%) with Caco-2 permeability (Papp). Of the list of national essential medicines, 135 orally administered drugs were classified into biopharmaceutical classification system (BCS). Of these, 57 (42.2%), 28 (20.7%), 44 (32.6%), and 6 (4.4%) were class I, II, III and IV respectively. Conclusion: Log D6.0 showed better prediction capability than log P. Metoprolol as permeability internal standard was more conservative than labetalol.
Molecular Dynamics Simulation of Cross-linked Graphene-Epoxy Nanocomposites
R. Rahman,A. Haque
Physics , 2011,
Abstract: This paper focuses on molecular dynamics (MD) modeling of graphene reinforced cross-linked epoxy (Gr-Ep) nanocomposite. The goal is to study the influence of geometry, and concentration of reinforcing nanographene sheet (NGS) on interfacial properties and elastic constants such as bulk Young's modulus, and shear modulus of Gr-Ep nanocomposites. The most typical cross-linked configuration was obtained in order to use in further simulations. The mechanical properties of this cross-linked structure were determined using MD simulations and the results were verified with those available in literatures. Graphene with different aspect ratios and concentrations (1%, 3% and 5%) were considered in order to construct amorphous unit cells of Gr-Ep nanocomposites. The Gr-Ep nanocomposites system undergoes NVT (constant number of atoms, volume and temperature) and NPT (constant number of atoms, pressure and temperature) ensemble with applied uniform strain field during MD simulation to obtain bulk Young's modulus and shear modulus. The stress-strain response was also evaluated for both amorphous and crystalline unit cells of Gr-Ep system under uni-axial deformation. The cohesive and pullout force vs. displacement response were determined for graphenes with different size. Hence as primary goal of this work, a parametric study using MD simulation was conducted for characterizing interfacial properties and elastic constants with different NGS aspect rations and volume fractions. The MD simulation results show reasonable agreement with available published data in the literature.
A Probablistic Origin for a New Class of Bivariate Polynomials
Michael R. Hoare,Mizan Rahman
Symmetry, Integrability and Geometry : Methods and Applications , 2008,
Abstract: We present here a probabilistic approach to the generation of new polynomials in two discrete variables. This extends our earlier work on the 'classical' orthogonal polynomials in a previously unexplored direction, resulting in the discovery of an exactly soluble eigenvalue problem corresponding to a bivariate Markov chain with a transition kernel formed by a convolution of simple binomial and trinomial distributions. The solution of the relevant eigenfunction problem, giving the spectral resolution of the kernel, leads to what we believe to be a new class of orthogonal polynomials in two discrete variables. Possibilities for the extension of this approach are discussed.
A Probablistic Origin for a New Class of Bivariate Polynomials
Michael R. Hoare,Mizan Rahman
Mathematics , 2008, DOI: 10.3842/SIGMA.2008.089
Abstract: We present here a probabilistic approach to the generation of new polynomials in two discrete variables. This extends our earlier work on the 'classical' orthogonal polynomials in a previously unexplored direction, resulting in the discovery of an exactly soluble eigenvalue problem corresponding to a bivariate Markov chain with a transition kernel formed by a convolution of simple binomial and trinomial distributions. The solution of the relevant eigenfunction problem, giving the spectral resolution of the kernel, leads to what we believe to be a new class of orthogonal polynomials in two discrete variables. Possibilities for the extension of this approach are discussed.
Parotid lymphoepithelial cyst: a case report
S. Rahman,R.Shaari,R. Hassan
Archives of Orofacial Sciences , 2006,
Abstract: A 48 years old Malay lady with a case of painless soft fluctuant swelling of left parotid gland is reported. The lesion was found to be a cystic lesion through the pre operative examinations and investigations. The cyst was completely excised, taking care not to injure the lower division of the facial nerve. Post recovery was uneventful with no defect of the facial nerve functions. The histologic picture confirmed that the cyst was lymphoepithelial cyst which is so called “branchial cyst”. Through the literature reviews of parotid lymphoepitelial cyst the discussions on prevalence, origin, diagnosis, histological finding, investigation and the modes of treatment are made. The ultra sound was found to be valuable in the pre operative evaluation of the parotid swelling furthermore it is non-invasive, harmless, painless and relatively quick.
Quality Control of Dual Energy X-Ray Absorptiometry  [PDF]
M. A. Reza, A. K. Paul, H. R. Khan, M. R. Rahman
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2018, DOI: 10.4236/ijmpcero.2018.73026
Abstract: Dual energy X-ray absorptiometry (DXA) is a dominant technique for the measurement of bone mineral density (BMD). Quality control (QC) of DXA is very important for the accuracy of results and correct interpretation made by the physician. We have performed the quality control procedures of Lunar DPX Pro bone densitometer according to the manufacturer’s recommendations and current clinical guidelines at the Institute of Nuclear Medicine & Allied Sciences (INMAS), Khulna. The objective of this study is to maximize the performance of the technologist as well as the reliability of the equipment (Linearity, X-ray tube output, Half value layer, Kerma-area product, Radiation field size, Fan angle, Spatial resolution, Room safety). The study result shows that the mean BMD reading is 1.004 g/cm2 with a standard deviation of 0.0035 and co-efficient of variation 0.34%. It also shows that the precision of the technologist is good and there is no malfunctioning in the DXA bone densitometer.
Schwannomas—Atypical Presentation and Challenges  [PDF]
R. Vijai, J. Ruban Kumar, R. Arihanth, Manoj Prabu, Narayanasami Bharath, Khalilur Rahman, Arcot Rekha
Case Reports in Clinical Medicine (CRCM) , 2019, DOI: 10.4236/crcm.2019.84011
Abstract: Introduction: Neurogenic tumors include schwannomas and neurofibro-mas. They occur often in the head and neck. However, their occurrence on the vagus is uncommon. A high index of suspicion is needed to order imaging in pelvic lesions that present atypically. Discussion: Schwannomas are hypointense on T1 and heterogeneously hyperintense on T2 on MRI. The histopathological appearance with Antoni type A and type B is typical of Schwannoma. Conclusion: Schwannomas are slow growing benign tumors that are separable from the parent nerve. Recurrence is uncommon after resection.
Page 1 /227198
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.