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Incidental biliary dilation in the era of the opiate epidemic:Hig. prevalence of biliary dilation in opiate users evaluated in the Emerg.ncy Department

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World Journal of Hepatolog. 2020年第12期12卷 1289-1298页

作者： Monique T barakat Subhas Banerjee Divisions of Adult and Pediatric g.stroenterolog. and Hepatolog. Stanford University Medical CenterStanfordCA 94305United States Division of g.stroenterolog. and Hepatolog. Stanford University Medical CenterStanfordCA 94304United States

BACKg.OUND Biliary dilation is frequently related to obstruction;however,non-obstructive factors such as ag. and previous cholecystectomy have also been *** the past two decades there has been a dramatic increase in opiate use/dependence and utilization of cross-sectional abdominal imag.ng.with increased detection of biliary dilation,particularly in patients who use *** To evaluate associations between opiate use,ag.,cholecystectomy status,ethnicity,g.nder,and body mass index utilizing.our institution’s integ.ated informatics *** One thousand six hundred and eig.ty-five patients(20%sample)presenting.to our Emerg.ncy Department for all causes over a 5-year period(2011-2016)who had underg.ne cross-sectional abdominal imag.ng.and had normal total bilirubin were included and *** Common bile duct(CBD)diameter was sig.ificantly hig.er in opiate users compared to non-opiate users(8.67 mm vs 7.24 mm,Pg.llbladder(8.98 vs 6.72,Pg.llbladder who did not use opiates(n=432),increasing.ag. did not predict CBD diameter(r^2=0.159,P=0.873).Heig.t weakly predicted CBD diameter(r^2=0.561,P=0.018),but weig.t,body mass index,ethnicity and g.nder did *** Opiate use and a history of cholecystectomy are associated with CBD dilation in the absence of an obstructive *** alone is not associated with increased CBD *** finding. sug.est that factors such as opiate use and history of cholecystectomy may underlie the previously-reported association of advancing.ag. with increased CBD *** prospective study is warranted.

关键词： Biliary dilation Opiate Narcotic Endoscopic ultrasound Endoscopic retrog.ade cholang.opancreatog.aphy Bile duct

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The Value of Saudi Arabia Industrial Firms Between the Modig.iani-Miller＇s and g.rdon＇s Models： An Empirical Study on Cement Companies in Saudi Arabia

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Journal of Modern Accounting.and Auditing 2012年第1期8卷 87-98页

作者： Abdullah Izzat barakat Hussein Samhan Shaqra University Kingdom of Saudi Arabia Zarqa University Jordan

The most important targ.t of the financial manag.ment is to develop the values of the foundation and develop the wealth of shareholders （wealth of the owners）, which is the primary targ.t of the qualified and successful financial manag.ment. This targ.t, developing.the value of the foundation, depends on the total profit that could be achieved by the company and counting.the profit per share, but undoubtedly, the financial manag.ment should consider the other targ.ts such as social responsibility and exchang. between risk and revenue and others. This research, with its both theoretical and practical aspects, aims at illuminating.the value of some foundations in Saudi Arabia, which are already reg.stered in the stock market, by comparing.the value of each foundation using.two models namely the model of Modig.iani-Miller （M＆M） and the model of g.rdon. In spite of the difficulties found in the usag. of both models, especially g.rdon＇s model, we will use both of them to explain the aspects of imperfection in each model. This research will depend on a sample of Sandi industrial companies by g.tting.financial data of these companies over a past decade and the usag. of these data, in other words, to measure the value of Saudi companies ag.inst the market.

关键词： value Modig.iani-Miller's g.rdon cement companies Saudi Arabia

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Radiation Induced g.afting.of Viscose Rayon Fabrics with Some Acrylic Acid Derivatives and Styrene

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Open Journal of Polymer Chemistry 2017年第1期7卷 1-18页

作者： Mahmoud barakat Foad Ahmed barakat Kariman Mohame El-Salmawy Abdel-Hamid Hussein Zahran Nuclear and Radiolog.cal Control Authority Cairo Egypt National Center of Radiation Research and Technolog. Atomic Energy Authority Cairo Egypt

Radiation induced g.afting.of viscose rayon fabrics, consisting.mainly of cellulose fibers, with some acrylic acid derivatives, namely methyl acrylate, acrylamide and acrylonitrile, and also styrene, has been studied. The resultant g.aft yields have been determined as a function of the applied different experimental parameters. The impact of the g.aft yields on the physicochemical properties of viscose rayon fabrics such as swelling. moisture absorption, tensile streng.h, elong.tion at break, crease recovery ang.e and also dyeing.ability of the g.afted fabrics, has been also studied.

关键词： Radiation g.aft Copolymerization Viscose Rayon g.mma Irradiation Monomers Styrene Acrylic Acid Derivatives

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Introduction to Mesh Based g.nerated Lumped Parameter Models for Electromag.etic Problems

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CES Transactions on Electrical Machines and Systems 2021年第2期5卷 152-162页

作者： Shuo Yang.Salim Asfirane Sami Hlioui Smail Mezani g.illaume Krebs Yacine Amara g.org.s barakat Mohamed g.bsi Wei Hua Southeast University NanjingChina UniversitéLe Havre Normandie Conservatoire national des arts et métiers Universitéde Lorraine UniversitéParis-Saclay Facultédes Sciences d'Orsay ENS Paris-Saclay

This paper is an introduction to mesh based g.nerated reluctance network *** overview of scientific works which led to the development of this approach is first *** concepts of the approach are then presented in the case of electromag.etic devices.A step-by-step procedure for coding.the approach in the case of a flat linear permanent mag.et machine is *** developed under MATLAB and Scilab environments are also included.

关键词： Lumped parameter modeling finite element method mesh electromag.etic devices modeling

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Development of An Axial Flow Fan for Hig. Performance and Low Noise

Development of An Axial Flow Fan for High Performance and Lo...

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作者：拉卡（Abdallah Alfatih Mohammed Ahmed barakat）东南大学

学位级别：硕士

本文提出了一种改善旋转机械气动噪声的方法,这是目前研究旋转机械气动噪声的基本需求和关键设计驱动力,以满足现有和未来的噪声规范要求。风扇是将马达的能量转换成流体压力使流体运动的部件。高气动效率和低噪声是风机设计的重要技术... 详细信息

本文提出了一种改善旋转机械气动噪声的方法,这是目前研究旋转机械气动噪声的基本需求和关键设计驱动力,以满足现有和未来的噪声规范要求。风扇是将马达的能量转换成流体压力使流体运动的部件。高气动效率和低噪声是风机设计的重要技术指标之一。本文的主要研究内容如下:(1)利用Solid Works软件进行几何设计,利用Ansys Fluent软件建立了用于预测叶片风机装置噪声的计算流体动力学(CFD)数值模型,实现了轴流风机的气动声学性能的预测与分析。利用Ffowcs-Williams和Hawking.(FW-H)模型对远场观测点进行了噪声排放计算。(2)建立了原轴流风机的有限元模型,并与实验结果进行了比较,验证了数值模型的有效性和可靠性。采用不同翼型参数对原风机进行了优化设计,采用正交优化方法改善了原风机的气动性能。研究了导流锥结构对气动性能的影响,结果表明,当导流锥被拆下时,气动性能明显降低。(3)此外,还对9个不同结构参数的模型进行了评估,并与实验风扇数据进行了比较,以探讨在不同的锯齿比、不同的幅值(h)和展向(λ)波长范围内,采用锯齿后缘法进行处理的有效性。结果表明,与锯齿形模型相比,原模型获得了较大的逆流涡。值得注意的是,模型参数λ/h=0.25和λ/h=1能有效地降低锯齿边缘的噪声,分别降低了14d B和4.2d B。此外,在相同的齿形比下,采用不同的λ和h值,可以达到11.4 d B的降噪效果。

关键词：气动噪声轴流风机降噪锯齿尾缘数值模拟

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基于空间公正的县域义务教育质量均衡评估指标体系构建

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教育与经济 2018年第2期34卷 27-34页

作者：赵丹陈遇春 Bilal barakat 张河森西北农林科技大学人文社会发展学院陕西杨凌712100 奥地利国际应用系统研究院奥地利维也纳2361 奥地利国际应用系统研究院联合国教科文组织

我国县域义务教育均衡发展逐步从资源配置的初始均衡向追求质量的高位均衡迈进。研究采用德尔菲法,从空间公正的理论视角,构建基于"可达性公正、获得性公正和感知公正"三维框架的县域义务教育质量均衡评估指标体系。在此基础上,结合县... 详细信息

我国县域义务教育均衡发展逐步从资源配置的初始均衡向追求质量的高位均衡迈进。研究采用德尔菲法,从空间公正的理论视角,构建基于"可达性公正、获得性公正和感知公正"三维框架的县域义务教育质量均衡评估指标体系。在此基础上,结合县域内校际间、乡镇间、城乡间3个维度,选择上学物理距离、时间距离、社会距离、教育资源、过程、结果、教育满意度等10个关键因素,构建由30个观测点组成的县域义务教育质量均衡监测指标矩阵,并提出实证测评的思路及方法。

关键词：空间公正县域义务教育质量均衡评估指标体系评测

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The Use of Ultrasound to Detect Sub-surface Defects in Aluminum Pieces

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Journal of Physical Science and Application 2011年第1期1卷 29-36页

作者： Mirham Abdallah barakat Hesham Abdel-Aziz Afifi National Institute of Standards 136 Giza code 12211 Tersa st Haram Giza Egypt

A normal ultrasonic transducer of 5 MHz is modified using.different delay lines and wedg.s desig. （made from Perspex）. Such modification is for ameliorate the capability of the transducer to detect sub-surface flaws. Some prepared Aluminum pieces were subjected to different crosshead speed （200 and 350 ram/rain）. The ultrasonic pulse echo method was used at room temperature. The measurements have been done before and after each tensile stress. Flaws were found at different distances from the specimen＇s surface. Results showed that such delay lines and wedg.s were suitable to detect sub-surface flaws that were initiated under the effect of stress. In addition, a crosshead speed increment caused more sub-surface flaws formation.

关键词： Transducer delay line (DL) crosshead speed pulse echo technique.

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城乡教育一体化背景下乡村小规模学校布局调整与优化建议——基于陕西省宁强县的案例分析

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中国教育学刊 2021年第5期 70-74页

作者：赵丹郭清扬 Bilal barakat 陕西师范大学教育学院西北农林科技大学人文社会发展学院陕西西安710062 华中师范大学教育学院湖北武汉430079 奥地利国际应用系统研究院维也纳2361

我国义务教育正在由优质均衡向城乡一体化发展迈进,作为乡村地区常态化办学形式的小规模学校,其空间布局合理化直接决定着广大乡村儿童能否就近入学、公平享有优质教育的机会。研究基于陕西省宁强县的微观数据,采用g.S技术方法,从地理... 详细信息

我国义务教育正在由优质均衡向城乡一体化发展迈进,作为乡村地区常态化办学形式的小规模学校,其空间布局合理化直接决定着广大乡村儿童能否就近入学、公平享有优质教育的机会。研究基于陕西省宁强县的微观数据,采用g.S技术方法,从地理位置、服务范围、家校距离、上学可达性等维度动态分析小规模学校布局变化和存在的问题:城乡教育一体化发展中公平与效率冲突,布局过于分散,撤并后儿童上学距离加大且承担较高成本,保留的小规模学校与县镇学校办学资源差距依然较大且合作网络缺失。由此,各级教育行政部门应在城乡义务教育布局统筹中坚持公平优先、效率兼顾、质量导向的价值取向, 采用科学的规划程序和调整模式,合理撤并和保留小规模学校, 加强政策支持,补偿偏远地区儿童求学成本, 构建校际合作网络,促进小规模学校共享优质资源。

关键词：乡村小规模学校学校布局城乡一体化

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The Effect of Herbicides on the Eg.ptian Broomrape (<i&g.;Orobanche aeg.ptiaca</i&g.;) in Tomato Fields

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American Journal of Plant Sciences 2012年第3期3卷 346-352页

作者： Ibrahim g.annam Mohammad Al-Masri Radwan barakat Faculty of Ag.iculture Hebron University Hebron Palestine

The Eg.ptian broomrape (Orobanche aeg.ptiaca Pers.) is an oblig.te holoparasitic weed that causes severe damag. to many important veg.table and field crops. In this investig.tion, three herbicides;chlorsulfuron, triasulfuron and imazaquin were tested to evaluate their efficiency in controlling.the tomato broomrape. The herbicides sig.ificantly reduced the broomrape parasitizing.tomato plants g.owing.in pots, irrig.ted open field and under g.eenhouse conditions as foliar spray at the concentrations (0.5 - 10 μg.ml-1) without visible injury effect on the plants. In the pot experiments, triasulfuron increased the dead spikes from 77% to 84%;chlorsulfuron from 51% to 84% and imazaquin from 52% to 84% at the concentrations (0.5 - 5 μg.ml-1) compared with the control. In the irrig.ted open field experiment, the herbicides were less efficient in controlling.the broomrape. The dead spikes increased from 10.5% to 29.1% at the concentrations (1 - 5 μg.ml-1) compared with the control. In the g.eenhouse experiment, the herbicides were more effective than open field and the dead spikes were increased from 30 to 68% at the concentrations 5 and 10 μg.ml-1. In conclusion, the foliar application of herbicides were able to increase the broomrape dead spikes attached to the tomato plants at the concentrations (3 - 5 μg.ml-1) without visible neg.tive effect on tomato plants.

关键词： Orobanche aeg.ptiaca Chlorsulfuron Triasulfuron Imazaquin Broomrape and Tomato

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Childhood Exposure to Air Pollution as a Potential Contributor of Chronic Non-Respiratory Inflammatory Disorders: A Long.tudinal Prospective Cohort Study in Hamilton, Canada

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Journal of Environmental Protection 2013年第8期4卷 779-788页

作者： Caroline barakat-Haddad Susan Elliott David Peng.lly Department of Anthropolog. University of Toronto Scarborough Toronto Canada Department of Medicine McMaster University Hamilton Canada Faculty of Applied Health Sciences University of Waterloo Waterloo Canada

This study examines the relationship between childhood exposure to air pollution and diag.osis with chronic non-respiratory health outcomes in adulthood. This prospective cohort study uses data collected in the 1970/1980s from 395 children, including.exposure to air pollution. Over thirty years later, a survey collected data on various health outcomes, including.diag.osis with arthritis, hig. blood pressure, long.term skin conditions, and hay fever allerg.es. Log.stic reg.ession modeling.was performed to examine the relative contribution of childhood exposure to air pollution on chronic non-respiratory health outcomes in adulthood. Childhood exposure to SO2 emerg.d as a sig.ificant predictor of arthritis (OR = 2.73, 95% CI 1.20 - 6.18) and hig. blood pressure (OR = 2.82, 95% CI 1.23 - 6.47). Other sig.ificant predictors include respiratory symptoms during.childhood, family income during.childhood and adulthood, property tenure, employment status, residential exposures, life events, physical activity, and body mass index. Childhood exposure to air pollution did not emerg. as a sig.ificant predictor of long.term skin conditions or hay fever allerg.es. Finding. contribute to the debate on the health effects of air pollution, indicating.that the health impacts of childhood exposure to air pollution may include chronic inflammatory disorders in adulthood.

关键词： Air Pollution Health Development Hay Fever Arthritis Hypertension Skin Diseases

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