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Optics and Photonics Journal 2018年第8期8卷 277-287页

作者： Mohd Ashraf Gaurav Baranwal Dinesh Prasad Saima Idris mirza tariq beg Department of Electronics and Communication F/O Engineering and Technology Jamia Millia Islamia Delhi India

Free space optical communication (FSO) proves to be very effective and efficient technology for wireless communication. This work basically deals with the designing of FSO systems. Further, a comparative study has been made to ascertain which modulation technique proves better for communication. This paper investigates the performance of ASK and PSK modulation based FSO system by varying different FSO parameters under several conditions including haze, rain, mist and fog. Finally, simulation results are analysed and discussed.

关键词： FSO Bit Error Rate (BER) Amplitude Shift Keying (ASK) Phase Shift Keying (PSK) Attenuation

Significance of including lid thickness and particle shape factor in numerical modeling for prediction of particle trap efficiency of invert trap

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Water Science and Engineering 2024年第2期17卷 166-176页

作者： Salman beg Deo Raj Kaushal Department of Civil Engineering Indian Institute of Technology DelhiNew Delhi 110016India

Sediment accumulation on the bed of open sewers and drains reduces hydraulic efficiency and can cause localized *** invert traps installed underneath the bed of open sewers and drains can eliminate sediment build-up by catching sediment *** three-dimensional(3D)computational studies have examined the particle trapping performance of invert traps of different shapes and depths under varied sediment and flow conditions,considering particles as *** two-dimensional and 3D numerical modeling,researchers assumed the lid geometry to be a thin line and a plane,*** this 3D numerical study,the particle trapping efficiency of a slotted irregular hexagonal invert trap fitted at the flume bottom was examined by incorporating the particle shape factor of non-spherical sewage solid particles and the thicknesses of upstream and downstream lids over the trap in the discrete phase model of the ANSYS Fluent 2020 R1 *** volume of fluid(VOF)and the realizable k-turbulence models were used to predict the velocity *** two-dimensional particle image velocimetry(PIV)was used to measure the velocity field inside the invert *** results showed that the thicknesses of upstream and downstream lids affected the velocity field and turbulent kinetic energy at all flow *** joint impact of the particle shape factor and lid thickness on the trap efficiency was *** both the lid thickness and particle shape factor were considered in the numerical modeling,trap efficiencies were underestimated,with relative errors of-8.66%to-0.65%in comparison to the experimental values of Mohsin and Kaushal(2017).They were also lower than the values predicted by Mohsin and Kaushal(2017),which showed an overall overestimation with errors of-2.3%to 17.4%.

关键词： Invert trap Lid thickness Particle image velocimetry Particle shape factor Turbulent kinetic energy Scanning electron microscope

Numerical simulation of self-similar thermal convection from a spinning cone in anisotropic porous medium

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Journal of Hydrodynamics 2016年第2期28卷 184-194页

作者： O. Anwar beg M. J. UDDIN T. beg R. Reddy GORLA Spray Research Group Petroleum and Gas Engineering Division Room G77 Newton Building School of Computing Science and Engineering (CSE) University of Salford M54WT UK Department of Mathematics American International University-Bangladesh Dhaka Bangladesh Engineering Mechanics Associates Dickenson Road Manchester M 16 England UK Department Mechanical Engineering Cleveland State University Cleveland Ohio USA

Self-similar steady natural convection thermal boundary layer flow from a rotating vertical cone to anisotropic Darcian porous medium is investigated theoretically and numerically. The transformed non-dimensional two-point boundary value problem is reduced to a system of coupled, highly nonlinear ordinary differential equations, which are solved subject to robust surface and free stream boundary conditions with the MAPLE 17 numerical quadrature software. Validation with earlier non-rotating studies is included, and also further verification of rotating solutions is achieved with a variational finite element method （FEM）. The rotational （spin） parameter emerges as an inverse function of the Grashof number. The influence of this parameter, primary Darey number, secondary Darcy number and Prandtl number on tangential velocity and swirl velocity, temperature and heat transfer rate are studied in detail. It is found that the dimensionless tangential velocity increases whilst the dimensionless swirl velocity and temperature decrease with the swirl Darcy number, tangential Darcy number and the rotational parameters. The model finds applications in chemical engineering filtration processing, liquid coating and spinning cone distillation columns.

关键词： self-similarity spinning cone finite element method (FEM) anisotropic porous medium heat transfer MAPLE FEM

Advanced glycation end product signaling and metabolic complications:Dietary approach

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World Journal of Diabetes 2023年第7期14卷 995-1012页

作者： Mohammad Idreesh Khan Fauzia Ashfaq Abdulrahman A Alsayegh Alshaimaa Hamouda Fahmida Khatoon Tahani Nasser Altamimi Fahad Saad Alhodieb mirza Masroor Ali beg Department of Clinical Nutrition College of Applied Health Sciences in Ar RassQassim UniversityAr Rass 51921Saudi Arabia Clinical Nutrition Department Applied Medical Sciences CollegeJazan UniversityJazan 82817Saudi Arabia Department of Biochemistry College of MedicineUniversity of HailHail 2240Saudi Arabia Department of Family and Community Medicine College of MedicineUniversity of HailHail 2240Saudi Arabia Faculty of Medicine Alatoo International UniversityBishkek 720048Kyrgyzstan

Advanced glycation end products(AGEs)are a heterogeneous collection of compounds formed during industrial processing and home cooking through a sequence of nonenzymatic glycation *** modern western diet is full of heat-treated foods that contribute to AGE *** high in AGEs in the contemporary diet include processed cereal *** to industrialization and marketing strategies,restaurant meals are modified rather than being traditionally or conventionally ***,grilled,baked,and boiled foods have the greatest AGE *** AGE-content foods include dry nuts,roasted walnuts,sunflower seeds,fried chicken,bacon,and *** proteins and processed plant foods contain furosine,acrylamide,heterocyclic amines,and ***(2-furoil-methyl-lysine)is an amino acid found in cooked meat products and other processed *** concentrations of carboxymethyl-lysine,carboxyethyl-lysine,and methylglyoxal-O are found in heat-treated nonvegetarian foods,peanut butter,and cereal *** plasma levels of AGEs,which are harmful chemicals that lead to age-related diseases and physiological aging,diabetes,and autoimmune/inflammatory rheumatic diseases such as systemic lupus erythematosus and rheumatoid *** in the pathophysiology of metabolic diseases have been linked to individuals with diabetes mellitus who have peripheral nerves with high amounts of AGEs and diabetes has been linked to increased myelin *** resistance and hyperglycemia can impact numerous human tissues and organs,leading to long-term difficulties in a number of systems and organs,including the cardiovascular *** AGE levels are linked to all-cause mortality in individuals with diabetes who have fatal or nonfatal coronary artery disease,such as ventricular *** levels of tissue AGEs are independently associated with cardiac systolic dysfunction in diabetic patients with heart failure compared with diabetic pat

关键词： Advanced glycation end products Receptor for advanced glycation end products Heat-treated diets Food safety Maillard reaction products Metabolic disorder Diabetes Cardiac complication

Effect of CuO Doping on the Electrical Behavior of ZrO2

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Chinese Journal of Chemistry 2007年第8期25卷 1112-1115页

作者： SABA beg SARITA POOJA Varshney Department of Chemistry Aligarh Muslim University Aligarh 202002 India

Electrical conductivity has been measured at different temperatures for ZrO2 doped with various molar ratios of CuO. The conductivity increases due to migration of vacancies, created by doping. The conductivity was found to increase with increase in temperature till 220℃ and thereafter decrease due to collapse of the fluorite framework. A second rise in conductivity around 500 ℃ was observed due to phase transition of ZrO2. X-ray powder diffraction, DTA and IR studies were carried out for confirming doping effect and phase transition in ZrO2.

关键词： oxide doping effect electrical conductivity XRD

Role of lithology, weathering and precipitation on water chemistry of lakes from Larsemann Hills and Schirmacher Oasis of East Antarctica

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Advances in Polar Science 2019年第1期30卷 35-51页

作者： Rajesh ASTHANA Prakash K SHRIVASTAVA Hari B SRIVASTAVA Ashit K SWAIN mirza Javed beg Amit DHARWADKAR Central Head Quarter M-IV Geological Survey of India Central Head Quarters State Unit Sikkim Geological Survey of India Department of Geology Banaras Hindu University National Centre for Polar and Ocean Research Ministry of Earth Sciences Government of India Headland Sada Polar Studies Division Geological Survey of India

Schirmacher Oasis and Larsemann Hills areas represent two different periglacial environments of East Antarctica. Schirmacher Oasis is characterized by a vast stretch of ice-shelf in the north and East Antarctic Ice Sheet(EAIS) to its south. Whereas, in Larsemann Hills area the northern and north-western boundary is coastal area and EAIS in the southern part,exhibiting polar lowland between the marine and continental glacial ecosystems. Physico-chemical parameters of water samples from different lakes of both of these two distinct locations are quite contrasting and have indicated influence of lithology, weathering, evaporation and precipitation. The lake water chemistry in Larsemann Hills area is mainly governed by the lithology of the area while Schirmacher lakes exhibit influence of precipitation and rock composition. All major ions of lake waters indicate balanced ionic concentrations. The atmospheric precipitation has significantly modified the ionic distributions in the lakes and channels. Carbonation is the main proton supplying geochemical reactions involved in the rock weathering and this is an important mechanism which controls the hydrochemistry. The lake water hydrochemistry differs widely not only between two distant periglacial zones but also within a short distance of a single periglacial entity, indicating influence of territorial climate over hydrochemistry.

关键词： lake water ionic concentration Schirmacher Oasis Larsemann Hills East Antarctica

巴基斯坦旁遮普中部仓鸮食性的季节性变化(英文)

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动物学报 2007年第3期53卷 431-436页

作者： Muhammad MAHMOOD-UL-HASSAN mirza Azhar beg Habib ALI Department of Wildlife and Ecosystem University of Veterinary and Animal Sciences Syed Abdul Qader Jilani Road Lahore 54000 Pakistan Department of Zoology and Fisheries University of Agriculture Faisalabad Pakistan Pakistan Museum of Natural History Islamabad Pakistan

在巴基斯坦对仓鸮食性的季节变化进行了研究。通过分析连续3年在6个地区搜集的2 360个仓鸮回吐食物团,发现其食物主要是小型哺乳动物(95.6 %)。其中,家(Suncus murinus)有最高的比例,达65.6%(冬季最多78%,夏季最少27%)。就生物量而言... 详细信息

在巴基斯坦对仓鸮食性的季节变化进行了研究。通过分析连续3年在6个地区搜集的2 360个仓鸮回吐食物团,发现其食物主要是小型哺乳动物(95.6 %)。其中,家(Suncus murinus)有最高的比例,达65.6%(冬季最多78%,夏季最少27%)。就生物量而言,小型哺乳动物占仓鸮食物总生物量的99% 。

关键词：仓鸮食性家 回吐食物团鼠类

Fuzzy Transitive Relations

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模糊系统与数学 2010年第4期24卷 162-169页

作者： Ismat beg Samina Ashraf Centre for Advanced Studies in Mathematics Lahore University of Management Sciences 54792-LahorePAKISTAN

A modified definition of fuzzy transitivity is *** properties of this new definition are *** of these new properties of transitivity on equivalence relations is also studied.

关键词： Fuzzy Relations Transitivity Order Equivalence Approximate Indistinguishability

Role of PTPN2/22 polymorphisms in pathophysiology of Crohn's disease

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World Journal of Gastroenterology 2018年第6期24卷 657-670页

作者： Robert C Sharp Shazia A beg Saleh A Naser Burnett School of Biomedical Sciences College of Medicine University of Central Florida University of Central College of Medicine Health CenterOrlando

AIM To establish the relationship of protein tyrosine phosphatase non-receptor type 2 and 22(PTPN2/22) polymorphisms and mycobacterial infections in Crohn's disease(CD). METHODS All 133 subjects' blood samples were genotyped for nine single nucleotide polymorphisms(SNPs) in PTPN2/22 using TaqMan^(?) genotyping, while the effect of the SNPs on PTPN2/22 and IFN-γ gene expression was determined using RT-PCR. Detection of Mycobacterium avium subspecies paratuberculosis(MAP) IS900 gene was done by nPCR after DNA extraction from the isolated leukocytes of each subjects' blood samples. T-cells isolated from the patient samples were tested for response to phytohematoagglutonin(PHA) mitogen or mycobacterial antigens by Brd U proliferation assays for T-cell activity. RESULTS Out of the nine SNPs examined, subjects with either heterozygous(TC)/minor(CC) alleles in PTPN2:rs478582 occurred in 83% of CD subjects compared to 61% healthy controls(P-values < 0.05; OR = 3.03). Subjects with either heterozygous(GA)/minor(AA) alleles in PTPN22:rs2476601 occurred in 16% of CD compared to 6% healthy controls(OR = 2.7). Gene expression in PTPN2/22 in CD subjects was significantly decreased by 2 folds compared to healthy controls(P-values < 0.05). IFN-γ expression levels were found to be significantly increased by approxiately 2 folds in subjects when either heterozygous or minor alleles in PTPN2:rs478582 and/or PTPN22:rs2476601 were found(P-values < 0.05). MAP DNA was detected in 61% of CD compared to only 8% of healthy controls(P-values < 0.05, OR = 17.52), where subjects with either heterozygous or minor alleles in PTPN2:rs478582 and/or PTPN22:rs2476601 had more MAPbacteremia presence than subjects without SNPs did. T h e average T-cell proliferation in CD treated with PHA or mycobacteria antigens was, respectively, 1.3 folds and 1.5 folds higher than healthy controls without any significant SNP. CONCLUSION The data suggests that SNPs in PTPN2/22 affect the negative regulation of the im

关键词： Crohn’s disease PTPN2 PTPN22 PTPN2/22 Mycobacteria single nucleotide polymorphisms

DTM Simulation of Peristaltic Viscoelastic Biofluid Flow in Asymmetric Porous Media： A Digestive Transport Model

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Journal of Bionic Engineering 2015年第4期12卷 643-655页

作者： Dharmendra Tripathi Osman Anwar beg Praveen Kumar Gupta Ganjam Radhakrishnamacharya Jagannath Mazumdar Department of Mechanical Engineering Manipal University Jaipur Jaipur 303007 India Gort Engovation-Bio-Propulsion Research Gabriel's Wing House Bradford BD6 1FA UK Department of Mathematics National Institute of Technology Silchar Silchar 788010 India Department of Mathematics National Institute of Technology Warangal 506004 India School of Electrical & Electronic Engineering The University of Adelaide Adelaide SA 5005 Australia

A biofluid dynamics mathematical model is developed to study peristaltic flow of non-Newtonian physiological liquid in a two-dimensional asymmetric channel containing porous media as a simulation of obstructed digestive （intestinal） transport. The fractional Oldroyd-B viscoelastic rheological model is utilized. The biophysical flow regime is constructed as a wave-like motion and porous medium is simulated with a modified Darcy-Brinkman model. This model is aimed at describing the diges- tive transport in intestinal tract containing deposits which induce impedance. A low Reynolds number approximation is em- ployed to eliminate inertial effects and the wavelength to diameter ratio is assumed to be large. The differential transform method （DTM）, a semi-computational technique is employed to obtain approximate analytical solutions to the boundary value problem. The influences of fractional （rheological material） parameters, relaxation time, retardation time, amplitude of the wave, and permeability parameter on peristaltic flow characteristics such as volumetric flow rate, pressure difference and wall friction force are computed. The present model is relevant to flow in diseased intestines.

关键词： peristaltic transport fractional Oldroyd-B model porous medium differential transform method asymmetricchannel obstructed digestive flow