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Dengue fever in Egypt:Current situation and future risks

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Asian Pacific Journal of Tropical Medicine 2024年第10期17卷 429-431页

作者： Marwa omar Department of Medical Parasitology Faculty of MedicineZagazig UniversityZagazig44511Egypt

Dengue or dengue fever(DF)is an acute infectious disease of a febrile *** is caused by the dengue virus(DENV),which belongs to the family Flaviviridae and has four antigenically distinctive serotypes(DENV-1,DENV-2,DENV-3 and DENV-4).DENV is regarded as one of the most prevalent fast-emerging mosquito-borne viruses,which has a wide distribution in many tropical and subtropical regions *** virus is typically transmitted following the bite of an infected female mosquito of the species,Aedes(Ae.)aegypti and ***[1].

关键词： fever acute typically

Applications of synchrophasor technologies in power systems

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Journal of Modern Power Systems and Clean Energy 2019年第2期7卷 211-226页

作者： Muhammad Usama USMAN M. omar FARUQUE Department of Electrical and Computer Engineering Center for Advanced Power Systems Florida State University

Synchrophasors are time-synchronized electrical measurements that represent both the magnitude and phase angle of the electrical sinusoids. Synchrophasors are measured by fast time-stamped devices called phasor measurement units(PMUs) to constitute the basis of realtime monitoring and control actions in the electric *** to its enhanced situational awareness capabilities,many applications of PMUs are presented in the literature in the past decades. This paper presents a comprehensive summary of synchrophasor technology, its architecture,optimal placement techniques and its applications in electric power transmission and distribution systems. These applications include wide-area situational awareness and monitoring, state estimation, fault location and protective relaying, islanding detection etc. This review also covers some of the existing challenges in its implementation and its potential applications.

关键词： Phasor measurement unit(PMU) Supervisory control and data acquisition(SCADA) Synchrophasor technology(ST) Power system

Effect of seasonal changes on predictive model of bovine babesiosis transmission

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International Journal of Modeling, Simulation, and Scientific Computing 2017年第3期8卷 178-194页

作者： Leila Bouzid omar Belhamiti Laboratory of Pure and Applied Mathematics Department of Mathematics and Computer Science Abdelhamid Ben Badis University Mostaganem 27000 Algeria

In this paper,we present an attempt at analyzing the seasonal pattern of the Babesiosis transmission dynamics in bovine and tick *** infestation rate plays an important role in the variation of *** this logic,we set out a mathematical model with variable infestation rate for the evolution of babesiosis *** the(0,2)-Jacobi multi-wavelets method combined with the decoupling and quasi-linearization technique,we demonstrate the validity and applicability of our ***,a set of experimental data is used to validate the proposed model under the same operating *** results of numerical simulations are provided to show the impact of seasonality on the transmission dynamics of ***,a numerical study of the model varying the control parameters of babesiosis shows different scenarios about the spread of the disease.

关键词： Babesiosis disease seasonal effects infestation rate jacobi wavelets method

Doppler ultrasonography in living donor liver transplantation recipients: Intra- and post-operative vascular complications

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World Journal of Gastroenterology 2016年第27期22卷 6145-6172页

作者： omar Abdelaziz Hussein Attia Department of Diagnostic and Interventional Radiology Cairo University Hospitals Department of Diagnostic and Interventional Radiology National Cancer Institute Cairo University

Living-donor liver transplantation has provided a solution to the severe lack of cadaver grafts for the replacement of liver afflicted with end-stage cirrhosis, fulminant disease, or inborn errors of metabolism. Vascular complications remain the most serious complications and a common cause for graft failure after hepatic transplantation. Doppler ultrasound remains the primary radiological imaging modality for the diagnosis of such complications. This article presents a brief review of intra- and post-operative living donor liver transplantation anatomy and a synopsis of the role of ultrasonography and color Doppler in evaluating the graft vascular haemodynamics both during surgery and post-operatively in accurately defining the early vascular complications. Intra-operative ultrasonography of the liver graft provides the surgeon with useful real-time diagnostic and staging information that may result in an alteration in the planned surgical approach and corrections of surgical complications during the procedure of vascular anastomoses. The relevant intraoperative anatomy and the spectrum of normal and abnormal findings are described. Ultrasonography and color Doppler also provides the clinicians and surgeons early post-operative potential developmental complications that may occur during hospital stay. Early detection and thus early problem solving can make the difference between graft survival and failure.

关键词： Doppler Ultrasound Living donor Liver transplantation Intraoperative Postoperative Vascular Complications

EFFECT OF BUILDING PLAN FORM ON HUMAN THERMAL COMFORT IN NATURALLY VENTILATED OPEN-PLAN ENCLOSURES LOCATED IN HOT CLIMATES

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Journal of Green Building 2017年第2期12卷 112-129页

作者： omar S.Asfour Faculty of Engineering Dept.of ArchitectureIslamic University of GazaP.O.Box 108Gaza CityPalestine

This study aims to examine the effect of building plan form on internal thermal comfort conditions in naturally ventilated open-plan buildings located in hot *** study examined the square and the rectangular plan forms in relation to several values of wind direction,building plan depth,and climatic *** study utilised CFD for ventilation prediction,DesignBuilder for thermal modelling,and the Tropical Summer Index(TSI)for thermal comfort *** three tools were integrated in a quantitative approach to fulfil the study *** study concluded that the use of area-weighted average velocity magnitude is more accurate in the assessment of natural ventilation performance,as it accounts for both internal velocity magnitude and *** study confirmed the common observation that the use of shallow building plans is more effective to increase internal air velocity and improve internal thermal *** some point of increased plan depth,the internal air velocity magnitude dramatically *** the three examined wind directions,this occurred when the plan depth exceeded 3H in the square cases and 2.5H in the rectangular ones,where H is the building *** value is much less than the commonly recommended maximum value of *** study also concluded that reducing building depth in the square cases has generally more potential to improve thermal comfort conditions when compared with the rectangular *** gross increase in Percentage of People Comfortable,PPC,in all the examined cases was 23%in the square cases,compared to 11%in the rectangular cases.

关键词： natural ventilation buildings open-plan thermal comfort hot climate

Low-Cost IMU Sensors for Satellite Maturity Improvement

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Computer Systems Science & Engineering 2022年第12期43卷 1315-1326页

作者： omar Ben Bahri Abdullah Alhumaidi Alotaibi Department of Science and Technology College of RanyahTaif UniversityP.O.Box 11099Taif21944Saudi Arabia

The satellite technology proves its impact in the modern era with itswide benefits and applications. However, the cost of the development in this fieldpresents gaps in many countries, almost the developed countries. Therefore, thispaper provides a rich platform around low-cost sensors in order to improve maturity in space technology, mostly the system of attitude determination and *** development of this knowledge turns out to be very interesting in order toachieve a space mission which leads to the progression of the spatial technologyreadiness level (TRL) defined by the international measurement scale which isable to estimate the technological maturity. Thus, the idea is carried out for thedevelopment of low-cost sensors’ system for attitude determination around anArduino board. A sensor fusion method was applied on three types of sensors:accelerometer, magnetometer, and gyroscope in order to detect the reliable orientation. It is aimed to apply quaternion based Kalman filter on different platformthan previous systems. It is succeeded therefore to improve measurementaccuracy around low-cost sensor to achieve the main goal of this paper.

关键词： ADS IMU sensors kalman filter low-cost satellite

Genotype-based precision nutrition strategies for the prediction and clinical management of type 2 diabetes mellitus

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World Journal of Diabetes 2024年第2期15卷 142-153页

作者： omar Ramos-Lopez Medicine and Psychology School Autonomous University of Baja CaliforniaTijuana 22390Baja CaliforniaMexico

Globally,type 2 diabetes mellitus(T2DM)is one of the most common metabolic disorders.T2DM physiopathology is influenced by complex interrelationships between genetic,metabolic and lifestyle factors(including diet),which differ between populations and geographic *** fact,excessive consumptions of high fat/high sugar foods generally increase the risk of developing T2DM,whereas habitual intakes of plant-based healthy diets usually exert a protective ***,genomic studies have allowed the characterization of sequence DNA variants across the human genome,some of which may affect gene expression and protein functions relevant for glucose *** comprehensive literature review covers the impact of gene-diet interactions on T2DM susceptibility and disease progression,some of which have demonstrated a value as biomarkers of personal responses to certain nutritional ***,novel genotype-based dietary strategies have been developed for improving T2DM control in comparison to general lifestyle ***,progresses in other omics areas(epigenomics,metagenomics,proteomics,and metabolomics)are improving current understanding of genetic insights in T2DM clinical *** more investigation is still needed,the analysis of the genetic make-up may help to decipher new paradigms in the pathophysiology of T2DM as well as offer further opportunities to personalize the screening,prevention,diagnosis,management,and prognosis of T2DM through precision nutrition.

关键词： Type 2 diabetes mellitus Nutrigenetics Single nucleotide polymorphism Genotype Diet Precision nutrition

Synergistic effect of MTHFR C677T and F2 G20210A polymorphisms on ischemic stroke

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Neuroscience Bulletin 2013年第6期29卷 725-730页

作者： Thierry Paluku They-They omar Battas Sellama Nadifi Department of Clinical Neuroscience and Biological Psychiatry Hassan Ⅱ University Laboratory of Genetic and Molecular Pathology Faculty of MedicineHassan Ⅱ University

The predisposition to stroke might involve interactive effects among variants in several *** tested this hypothesis by examining the influence of polymorphisms in methylenetetrahydrofolate reductase（MTHFR）（C677T） and prothrombin（F2）（G20210A） as risk factors for stroke in *** polymerase chain reaction-restriction fragment length polymorphism methods were used to analyze DNA from 91 stroke patients and 182 *** between the two polymorphisms and the risk of stroke was estimated by four-level models for the analysis of genetic *** the MTHFR 677TT nor the F2 20210GA genotype showed any significant association compared to the MTHFR CC and F2 GG genotypes,*** interactive effect between the MTHFR 677TT and F2 20210GA polymorphisms showed an increased risk of *** odds ratios,in univariate and multivariate analysis,for the combined polymorphisms were 4.99（95% CI,1.75–14.2,P = 0.001） and 5.29（95% CI,1.63–17.1,P = 0.005）,respectively.

关键词： genotyping prothrombotic polymorphisms risk factor MTHFR F2 stroke

Simple operated multipurpose temperature control cryostat

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第5期8卷 793-796页

作者： ABBAS T.A. omar M.S. Department of Physics College of Science University of SalahaddinArbilIraqi KurdistanIraq

A suitable simple optical cryostat for optical, magneto-optical, electrical and thermo-electrical measurements was designed. It is suitable for use in a magnetic pool gap as narrow as less than 1 cm. Throughout a long period of time, the heat diffusion process of the cryostat can be easily operated at slow increase in sample temperature in a range 1.25 K/min at 200 K that will be reduced gradually to 0.66 K at room temperature. Liquid nitrogen was used to cool down the temperature. During the operation, the change in the measured energy gap of a semiconductor sample and other physical parameters resulting from the change of temperature can be corrected through the temperature coefficient of that parameter at the corresponding temperature. The cryostat was successfully used for all experiments mentioned above to measure the properties of a single crystal of GaP (Gallium Phosphate) semiconductor.

关键词： Optical cryostat Electrical cryostat Magneto-optical cryostat