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Fabrication of automatic switch for AC-DC completely automated measurement system at NIS

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Journal of Measurement Science and Instrumentation 2017年第1期8卷 27-31页

作者： M Helmy A Raouf rasha S M Ali 国家标准化研究所电量计量部埃及吉萨12211-136

A fast automatic AC-DC switch is designed and fabricated mainly by a microcontroller and three double poles single throw reed *** new switch is introduced to establish a fully automated system for AC-DC measurements through ACDC transfer standards for the first time at the National Institute for standards(N IS)in *** implemented circuit of theautomatic AC-DC switch and its protection are presented in *** AC voltage source is calibrated against DC voltagesource by using the demonstrated automatic switch as an application The calibrated voltage ranges are2V,6V,20V and60V as *** uncertainty budget is also evaluated for the calibrated values.

关键词： AC voltage measurement AC-DC transfer standard automatic switching system uncertainty

Current dependence coefficient determination for different DC standard resistors measurements based on Ⅴ-Ⅰ method

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Journal of Measurement Science and Instrumentation 2016年第4期7卷 332-335页

作者： rasha S M Ali M Helmy A Raouf Department of Electrical Quantities Metrology National Institute for Standards （NIS）Giza 12211-136 Egypt

Current dependence and stability of the measured resistance value are very important for the accurate measurement of DC standard resistor. In this paper, the volt-ampere （V-I） measurement method has been applied to study the current depend-ence of four different types of standard resistors. Diverse values are obtained through the investigation of their stability at dif-ferent currents. Therefore, the current dependence coefficient （CDC） can be determined for each one of the studied resistors. Research shows CDC depends on the applied current value, the measurement time and the resistor type, as clearly demonstra-ted in this research.

关键词： current dependence coefficient standard resistors volt-ampere method resistor stability

Impact of COVID-19 pandemic on liver,liver diseases,and liver transplantation programs in intensive care units

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World Journal of Hepatology 2021年第10期13卷 1215-1233页

作者： Amr Salah Omar rasha Kaddoura Bassant Orabi Samy Hanoura Department of Cardiothoracic Surgery Hamad Medical CorporationDoha 3050DAQatar Department of Critical Care Medicine Beni Suef UniversityBeni Suef 61355Egypt Department of Medicine Weill Cornell Medical CollegeDoha 3050Qatar Department of Pharmacy Heart HospitalHamad Medical CorporationDoha 3050DAQatar Department of Anesthesia Alazhar UniversityCairo 6050Egypt Department of Anesthesia Weill Cornell Medical CollegeDoha 3050DAQatar

Emerging worldwide data have been suggesting that coronavirus disease 2019(COVID-19)pandemic consequences are not limited to the respiratory and cardiovascular systems but encompass adverse gastrointestinal manifestations including acute liver injury as *** cases of liver injury associated with higher fatality rates were observed in critically ill patients with *** care units(ICU)have been the center of disposition of severe cases of *** review discusses the pathogenesis of acute liver injury in ICU patients with COVID-19,and analyzes its prevalence,consequences,possible drug-induced liver injury,and the impact of the pandemic on liver diseases and transplantation programs.

关键词： COVID-19 Critical care Drugs Liver Liver transplantation Outcome Severe liver injury

Natural Convection of MHD over a Vertical Wavy Surface in Presence of Porous Media

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Journal of Applied Mathematics and Physics 2022年第11期10卷 3288-3300页

作者： rasha Adel Department of Mathematics Faculty of Science Helwan University Cairo Egypt

This paper shows the natural convective heat transfer in porous media over the vertical wavy surface and it assumes that the fluid is viscous and in-compressible. This model shows the effects of the inverse of Darcy number. The dimensional partial differential equations are converted into a dimensionless form. The non-linear system of equations is obtained and these equations are solved numerically by the finite difference method. The results are obtained for inverse Darcy number, magnetic parameter, Prandtl number, amplitude of surface, parameter of heat generation and parameter of thermal conductivity, and their effects on the velocity, temperature of the fluid and Nusselt number.

关键词： Natural Convection Magnetohydrodynamics (MHD) Porous Media Wavy Surface

Professional identity, wellness, and future hope among nurse interns in Egypt

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Frontiers of Nursing 2021年第3期8卷 279-290页

作者： rasha Mohammed Hussien Mahmoud Abdul Hameed Shahin Mervat Elshahat Ibrahim Department of Psychiatric Health Nursing Faculty of NursingZagazig UniversityZagazig 423423Egypt Critical Care Nursing Department Mohammed Al-Mana College for Medical SciencesDammam 34222Saudi Arabia Department of Family and Community Health Nursing Faculty of NursingSuez Canal UniversityIsmailia 545345Egypt

Objective:Since nursing is a performance-based profession,clinical learning environments play an important role in the acquisition of professional abilities and train nursing students to enter the nursing profession and become a registered *** study aimed to investigate the relations among professional identity,wellness,and future hope in nurse ***:A cross-sectional,analytic,descriptive,correlational study design was used to test these relations in the study where 210 nurse interns’students were selected using a convenience sampling from Zagazig University hospitals and Suez Canal University hospitals in *** questionnaires consisted of 4 parts,namely demographic characteristics,Professional Identity Scale for Nursing Students(PISNS),Holistic Health and Wellness Survey,and Hope ***:Less than half of the study sample had chosen nursing specialty by own will(43.8%),while slightly more than half of them had a"very good"graduation level,and had no nursing role *** lowest mean professional identity score was for independence in career choice while the highest was for social *** repor ted physical wellness mean-score was the least,while social wellness was the *** identity,wellness,and future hope scores differed significantly based on nurse interns’personal *** were statistically significant,positive,weak-to-moderate correlations among the scores of professional identity,wellness,and future hope;however,the"choice of nursing study by own will"was a statistically significant independent positive predictor of the scores of professional identity,wellness,and future ***:Nurse interns’professional identity,wellness,and future hope were positively ***,nurse interns’wellness was the lowest,and it should be fostered as it was the main predictor for future *** internship programs should be modulated to improve nurse interns’professional identity,par ticularly

关键词： hope identity independence internship nurse interns professional wellness

Squamous cell carcinoma metastatic to cervical lymph nodes from unknown primary origin:the impact of chemoradiotherapy

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Chinese Journal of Cancer 2012年第10期31卷 484-490页

作者： Hany Eldeeb rasha Hamdy Hamed Oncology Center Northampton General HospitalNorthampton NN1 5BDUK Department of clinical Oncology and Nuclear Medicine Faculty of MedicineMansoura UniversityEgypt

The management of cervical lymph node metastases of squamous cell carcinoma from an unknown primary site is still a therapeutic *** report here our experience in treating these patients with chemoradiotherapy as a curative *** from 40 patients were *** total,20(50%) patients underwent excisional *** patients underwent radiotherapy,which was delivered to both sides of the neck and pharyngeal mucosa(extensive field),and concurrent chemotherapy consisting of weekly cisplatin at a dose of 40 mg/*** clinical stage of the cervical nodes at presentation was N1 in 25%,N2 in 60%,and N3 in 15%.Most patients(75%) developed at least grade 3 *** patients(20%) had grade 3 xerostomia and 18 patients(45%) required esophageal dilation for *** 5-year overall survival(OS) rate of all patients was 67.5%.The 5-year OS rates of patients with N1,N2,and N3 lesions were 100%,67%,and 41%,respectively(P = 0.046).The 5-year progression-free survival rate was 62.5%.In multivariate analysis,only N stage significantly affected OS(P = 0.022).Emergence of the occult primary was very limited(1 patient only).Our results suggest that extensive irradiation of both sides of the neck and pharyngeal mucosa with concurrent chemotherapy results in a lower emergence of primary *** the survival of patients with unknown primary is comparable to that of patients with known primary,an attempt at cure should always be made.

关键词：鳞状细胞癌淋巴结化疗放射治疗多变量分析生存率患者隐匿性

Prophylactic effect of vitamin E against hepatotoxicity,nephrotoxicity,haematological indices and histopathology induced by diazinon insecticide in mice

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Current Zoology 2009年第3期55卷 219-226页

作者： Nahla S.EL-SHENAWY rasha A.AL-EISA Fawzia EL-SALMY Omema SALAH Biology Department Faculty of ScienceTaif UniversityKingdom of Saudi Arabia

Considering that the involvement of reactive oxygen species （ROS） has been implicated in the toxicity of various pesticides, this study was designed to study the ameliorative effect of Vitamin E （100 mg/kg body weight） on mice （25 -30 mg） treated with diazinon （32.5 or 16.25 mg/kg body weight） organophosphate insecticide for 14 days. Subehronic DZN exposure and the protective effects of vitamins E （vitE） were evaluated for their effects on haematological indices, the enzymes concerning liver damage [plasma alanine aminotransferase （ ALT）, aspartate aminotaransferase （ AST）, alkaline phosphatise （ ALP）, and some parameters of kidney function （urea and creatinine） in mice. Additionally, the histopathological changes in liver and kidney tissue were examined. The high dose of diazinon （DZNH） decreased the body weight significantly at the end of experiment. Additionally, the liver and kidney were examines for histopathological changes. The high dose of diazinon decreased body weight significandy. Moreover, there was a statistically significant decrease in haemoglobin （Hb）, red blood cell （RBC） and hematocrit （Hct） in diazinon-treated mice compared to controls. This decrease was partially remedied in the diazinon-treated group that also received vitE. Damage in the liver and kidney tissues was also evident as elevated plasma ALT, AST, ALP, urea and creatinine. VitE partially counteracts the toxic effect of DZN and repairs tissue damage in the liver and kidney, especially when supplemented to 1/4 LD50 intoxicated animals. Histopathological changes in liver and kidney were observed only in 32.5 mg/kg DZN given group. These results suggest that the effects of DZN are dose dependent. No pathological findings were observed in vitE ＋ DZNtreated groups. According to the present study, we conclude that vitE ean reduce the detrimental impacts of diazinon on haematological indicies, as well as liver and kidney function [ Current Zoology 55 （3）： 219 - 226, 2009].

关键词： Organophosphorus insecticide Alanine aminotransferase (ALT) Aspartate aminotransferase (AST) Albumin Urea Creatinine Histopathology

Neurobrucellosis in children

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Asian Pacific Journal of Tropical Biomedicine 2015年第2期5卷 158-161页

作者： Mohamed Ata Hendaus rasha Muneer Qaqish Ahmed Hassan Alhammadi Department of Pediatrics.Hamad Medical Corporation

Neurobrucellosis is a complication of brucellosis,which is considered endemic in the Indian subcontinent,Arabian Peninsula and Mediterranean *** reaches the central nervous system via hematogenous spread in the infected human being,or through *** can present with any neurological symptoms,hence,the index of suspicion must be high enough to make proper *** fluid studies are usually diagnostic,while imagings including magnetic resonance imaging and computed tomography are of little *** for therapy,a combination of antibiotics must be administered with a goal to reduce relapse or avoid *** duration of treatment should be tailored as per clinical signs and symptoms until the cerebrospinal fluid components return to normal,which might be up to six *** this article,we present an overall view of current understanding of neurobrucellosis in children,its epidemiology,clinical features,diagnostictests,and management options.

关键词： Children Brucella Neuro

The Influence of Control Design on Energetic Cost during FES Induced Sit-to-Stand

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Journal of Biomedical Science and Engineering 2014年第14期7卷 1096-1104页

作者： rasha Massoud Department of Biomedical Engineering Faculty of Mechanical and Electrical Engineering Damascus University Damascus Syria

This paper highlights the benefits of using intelligent model based controllers to produce FES induced sit-to-stand movement (FES-STS), in terms of reducing energy cost and producing more natural responses in comparison with conventional controllers. A muscle energy expenditure model for the quadriceps is implemented in the control design of FES-STS, then simulation is run for three different control designs: an adaptive neuro-fuzzy inference system controller (ANFIS), a conventional PID controller, and a hybrid ANFIS-PID controller. The PID control strategy results in negative energy expenditure of the quadriceps at the end of the STS initiation phase, this negative energy is caused by the high lengthening speeds at the muscle fiber level, which may lead to muscle fatigue or damage. Contrary to PID controller, model based controllers show positive energy expenditure, lower energy costs, and more natural curves of energy expenditure and knee torques.

关键词： Adaptive Neuro-Fuzzy Inference System (ANFIS) Functional Electrical Stimulation (FES) Sit to Stand (STS) Energitics Musculoskeletal Modeling Simulation