OALib Journal期刊

ISSN: 2333-9721




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匹配条件: “A Jalali” ,找到相关结果约460374条。
Comparison between Simple and Advanced Data Analysis to Pure Oxygen Absorption Spectrum at the 1270 nm Band  [PDF]
Muhammad A. Al-Jalali
Journal of Applied Mathematics and Physics (JAMP) , 2015, DOI: 10.4236/jamp.2015.39138
Abstract: Simple and advanced data analysis was carried out on the pure oxygen absorption spectrum by Voigt deconvolution method between 1200 - 1300 nm, which represented the near-infrared spectrum. Pressures were 1, 5, 10, 15, 20, and 25 bars at 298 K. Experimental spectral lines showed two peaks at 1264 nm belong to O2 dimol and 1268 nm wavelength belong to O2 monomer, but advanced analysis of spectral lines gave many peaks around those two peaks. The total number of energy levels (peaks) decreases when pressure increases.
Assessment of Performance Based Parameters in Near Fault Tall Buildings
A. Mohammadjafari,A. Jalali
Journal of Applied Sciences , 2009,
Abstract: Available codes are not well-suited for tall buildings and are very restrictive. In this study, we try to assess parameters such as drift limits, rotation of plastic hinge, capacity-demand ratio, etc. which have a significant role in defining performance levels for near-fault regions. We have selected two-dimensional steel moment resisting frames having 30, 40 and 50 stories. These buildings have been designed according to IBC and AISC practice codes as Special Moment Resisting Frames (SMRF) and have been analyzed by Design Spectrum Analysis (DSA). We have conducted nonlinear dynamic time history analyses by using a suite of near-fault accelerograms to assess the performances of selected buildings. Finally performance levels of structures have been evaluated and estimated and near fault effects on different parameters which are not completely considered in spectral analysis are assessed. Using nonlinear analysis and evaluating performance levels and assessing parameters such as drifts and formation of plastic hinges and their rotations quantities, ratios of capacity-demand, etc. some weak points of customary design method are detected.
Symptom patterns in adult patients stung by scorpions with emphasis on coagulopathy and hemoglubinuria
Rahmani, AH;Jalali, A;
Journal of Venomous Animals and Toxins including Tropical Diseases , 2012, DOI: 10.1590/S1678-91992012000400011
Abstract: the aim of this retrospective descriptive study was to highlight clinical manifestations 24-48 hours following referral of adult patients stung by scorpions. this study contains clinical records of 290 patients admitted to razi hospital due to scorpion stings in ahvaz, khuzestan province from 2004 to 2005. the most prevalent patient age range was 15-20 years (30.3%). the most common sting location (41.3%) was the upper extremity; nearly half (49.6%) had been admitted within 6-24 hours following sting, while a large majority (85.5%) were hospitalized for 24-48 hours. a total of 116 (40%) patients presented hemoglobinuria. contrary to available prior reports, the symptoms in none of the patients were accompanied by neurological manifestations. kidney manifestations (bun, creatinine), coagulopathy and transfusion were observed in patients with blood cell lysis and hemoglobinuria. the kidney problems were seen more in patients who had been admitted more than 24 hours after the accident. overall, the findings demonstrate that coagulation and hemoglobinuria signs produced by scorpion sting in ahvaz differ significantly from those reported elsewhere.
Therapy for glioma: Indian perspective
Munshi A,Jalali R
Indian Journal of Cancer , 2009,
Abstract: Central nervous system (CNS) are rare neoplasms with considerable heterogeneity and variation. The most common primary lesions of CNS are gliomas. A majority of the data about the demography and management of gliomas has emerged from the west. However, there may be considerable variation in the presentation, behavior, and response to treatment between patients in the western world and the Asian population. This article discusses gliomas with special reference to data from oncology centers in India.
Uncertainly estimation for stochastic RC electrical circuit parameters
R. Rezaeyan,A. Jalali
Applied Mathematical Sciences , 2012,
Normal mode coupling and Bloch states in elliptically birefringent 1D photonic crystals
Amir A Jalali,Miguel Levy
Physics , 2007,
Abstract: An analysis is presented of frequency versus wave-vector dispersion in elliptically birefringent one-dimensional layered periodic structures. The presence of local normal mode polarization state variations from one layer to the next is found to lead to mode coupling and to affect the wave-vector dispersion and the character of the Bloch states of the system.
Local Normal Mode Coupling and Energy Band Splitting in Elliptically Birefringent 1D Magnetophotonic Crystals
Amir A. Jalali,Miguel Levy
Physics , 2007, DOI: 10.1364/JOSAB.25.000119
Abstract: An analysis is presented of wave-vector dispersion in elliptically birefringent stratified magneto-optic media having one-dimensional periodicity. It is found that local normal-mode polarization-state differences between adjacent layers lead to mode coupling and impact the wave-vector dispersion and the character of the Bloch states of the system. This coupling produces extra terms in the dispersion relation not present in uniform circularly birefringent magneto-optic stratified media. Normal mode coupling lifts the degeneracy at frequency band cross-over points under certain conditions and induces a magnetization-dependent optical band gap. This study examines the conditions for band gap formation in the system. It shows that such a frequency-split can be characterized by a simple coupling parameter that depends on the relation between polarization states of local normal modes in adjacent layers. The character of the Bloch states and conditions for maximizing the strength of the band splitting in these systems are analyzed.
Band structure and Bloch states in birefringent 1D magnetophotonic crystals: An analytical approach
Miguel Levy,Amir A Jalali
Physics , 2007, DOI: 10.1364/JOSAB.24.001603
Abstract: An analytical formulation for the band structure and Bloch modes in elliptically birefringent magnetophotonic crystals is presented. The model incorporates both the effects of gyrotropy and linear birefringence generally present in magneto-optic thin film devices. Full analytical expressions are obtained for the dispersion relation and Bloch modes in a layered stack photonic crystal and their properties are analyzed. It is shown that other models recently discussed in the literature are contained as special limiting cases of the formulation presented herein.
Ab inito calculations of Hubbard parameters for NiO and Gd crystals
A. R Faghihi and S Jalali Asadabadi,S Jalali Asadabadi
Iranian Journal of Physics Research , 2008,
Abstract: In this research the Hubbard parameters have been calculated for NiO and Gd crystals, as two strongly correlated systems with partially full 3d and 4f levels, respectively. The calculations were performed within the density functional theory (DFT) using the augmented plane waves plus the local orbitat (APW+lo) method. We constructed a suitable supercell and found that the Hubbard parameters for the NiO and Gd compounds are equal to 5.9 eV and 5.7 eV, respectively. Our results are in good agreement with experimental data and results of other computational methods. Then we used the obtained parameters to study the structural properties of NiO and Gd by means of LDA+U approximation. Our results calculated by the LDA+U method which are in better agreement with the experiment show a significant improvement compared to the GGA approximation. The result shows that our method for calculating U parameter can be considered as a satisfactory method to study a strongly correlated system.
Differentially-Enhanced Sideband Imaging via Radio-frequency Encoding
A. M. Fard,A. Mahjoubfar,B. Jalali
Physics , 2015,
Abstract: We present a microscope paradigm that performs differential interference imaging with high sensitivity via optical amplification and radio-frequency (RF) heterodyne detection. This method, termed differentially-enhanced sideband imaging via radio-frequency encoding (DESIRE), uniquely exploits frequency-to-space mapping technique to encode the image of an object onto the RF sidebands of an illumination beam. As a proof-of-concept, we show validation experiment by implementing radio frequency (f = 15 GHz) phase modulation in conjunction with spectrally-encoded laser scanning technique to acquire one-dimensional image of a barcode-like object using a commercial RF spectrum analyzer.

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