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Quantum Information and Entropy squeezing of a Nonlinear Multiquantum JC Model

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Communications in Theoretical Physics 2002年第6期37卷 723-732页

作者： mahmoudabdel－aty MathematicsDepartment FacultyofScienceSouthValleyUniversitySohagEgypt

We investigate the entropy squeezing of the nonlinear k-quantum JC model.A definition of squeezing is presented for this system based on the quantum information *** utility of the Definition is Illustrated by examining squeezing in the information entropy of a nonlinear k-quantum two-level *** influence of the atomic coherence and the detuning parameter on the properties of the information entropy and squeezing of the atomic variables is examined.

关键词：量子场论熵压缩非线性多量子 JC模型

Crystallization kinetics of overlapping phases in Se70Te15Sb15 using isoconversional methods

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Progress in Natural Science:Materials International 2015年第2期25卷 169-177页

作者： M.A.abdel-Rahim M.M.Hafiz A.Z.mahmoud Physics Department Faculty of ScienceAssiut University Assiut 71516 Egypt

The crystallization kinetics of Se70Te15Sb15 chalcogenide glass was studied by Differential Scanning Calorimetry(DSC) under non-isothermal conditions. This glass was found to have a double glass transition and double overlapped crystalline phases. The overlapped crystalline phases were successfully separated using the Gaussian fit model. The activation energy, Ec, and Avrami index, n, were determined by analyzing the data using the Matausita et. al. method. A strong heating rate depending on the activation energy for the two crystalline peaks was observed. The results indicated that the transformation from amorphous to crystalline phases is a complex process involving different mechanisms of nucleation and growth. The variation of activation energy with crystalline fraction was determined by Kissenger–Akahira–Sunose(KAS) method. The obtained results of directly fitting the experimental DSC data to the calculated DSC curves indicated that the crystallization process of Se70Te15Sb15 glass cannot be satisfactorily described by the Johnson–Mehl–Avrami(JMA) model. Simulation results indicated that the Sestak–Berggren(SB) model is more suitable to describe the crystallization process for the studied glass. The crystalline phases for the two events were identified by using x-ray diffraction(XRD) and scanning electron microscopy(SEM).

关键词： Chalcogenides glasses Differential Scanning Calorimetry(DSC) Electron Microscopy X-ray diffraction

Pregnancy outcome of lactating dairy cows assigned for Presynch-Ovsynchsynchronization program and inseminated either at detected standing heat or at scheduled fixed time

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Asian pacific Journal of Reproduction 2019年第4期8卷 181-186页

作者： abdel-Tawab abdel-Razek Yassyn Khalil mahmoud Mohamed Hussein Theriogenology Department Faculty of Veterinary MedicineBeni-Suef UniversityBeni-SuefEgypt

Objective: To determine if insemination at standing heat results in a similar or higher pregnancy rate compared with fixed time artificial insemination, and to study some factors affecting the pregnancy rate. Methods: A total of 8944 inseminations were included in this study, from which 6823 inseminations were done in Holstein cows and 2121 inseminations were performed in Simmental cows. All cows were subjected to a Presynch-Ovsynch protocol. Cows detected in estrus (n=7424) were artificially inseminated, whereas cows not observed in estrus (n=1520) were submitted to fixed time artificial insemination. Results: The overall pregnancy rate of cows inseminated on the basis of the detected standing heat was comparable to that recorded for cows receiving fixed time artificial insemination. A higher pregnancy rate was recorded for cows during cold months than that recorded during hot months (P=0.000). A higher pregnancy rate was recorded for Simmental compared with that recorded for Holstein cows (P=0.001). Regarding parity, significant differences in the pregnancy rate were detected between primiparous and multiparous cows (P=0.040). In addition, artificial insemination technicians had no sigificant effect on pregnancy rate (P>0.05). Meanwhile, the used artificial insemination sires significantly (P=0.000) impacted the pregnancy rate. Conclusions: Insemination of cows detected in standing heat prior to predetermined fixed time results in similar pregnancy outcome and decreases days to the first service compared with insemination at the scheduled fixed time at the end of the Presynch-Ovsynch synchronization program. The overall pregnancy outcome is not affected by the breeding program, but it is highly impacted by cow's breed, parity, artificial insemination sire and breeding season.

关键词： Dairy cow Presynch Ovsynch Standing heat Fixed time artificial insemination

Impact of designed infection control educational program on nurses’knowledge and compliance with standard precautions at maternity hospitals

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Journal of Integrative Nursing 2023年第2期5卷 138-144页

作者： Fatma ZAGHLOUL-mahmoud Mohamed GAMAL-MOSTAFA Walaa mahmoud-abdel-RAHMAN Maternal and Newborn Health Nursing Department Faculty of NursingCairo UniversityCairoEgypt Nursing Administration Department Faculty of NursingCairo UniversityCairoEgypt

Objectives:This study aimed to assess the nurses’knowledge and compliance with infection control standard precautions and evaluate the impact of the designed infection control educational program on nurses’knowledge and compliance with standard precautions at the maternity *** and Methods:A quasi‑experimental one‑group pretest‑posttest design was used on convenient sample of 60 nurses working at Obstetrics and Gynecological hospital in Cairo University Hospital,Kasr El Ainy,who received“designed infection control educational program”for 6 *** data were collected through the questionnaire comprising demographics,knowledge,and compliance with standard precautions *** nurses’knowledge and compliance score were compared before and after ***:The studied nurses had higher level of knowledge(85.3%)and compliance(92.8%)regarding infection control standard precautions after the educational program compared to before the *** results revealed statistically significant difference between before and after the program regarding nurses’knowledge score(15.5±2.9 vs.17.1±1.6,P<0.001)and compliance score(58.5±13.2 vs.74.3±5.1,P<0.001).In addition,there was insignificant relation between nurses’knowledge and compliance with standard precautions both before(r=0.952,P=0.474)and after educational program(r=0.164,P=0.223).Conclusion:The nurses’level of knowledge and compliance regarding infection control standard precautions was significantly improved after the ***,it is recommended that periodical educational programs regarding the standard precautions of infection control are essential for nurses at maternity hospital.

关键词： Compliance infection control knowledge maternity nursing standard precautions

Role of zinc as an antioxidant and anti-inflammatory to relieve cadmium oxidative stress induced testicular damage in rats

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Asian Pacific Journal of Tropical Biomedicine 2016年第12期6卷 1056-1064页

作者： Samir Abd El-Monem Bashandy Enayat abdel Aziz Omara Hossam Ebaid Mohamed mahmoud Amin mahmoud Sanad Soliman Department of Pharmacology Medical DivisionNational Research Centre Department of Pathology National Research Centre Department of Zoology College of ScienceKing Saud University Department of Zoology Faculty of ScienceEl-Minia University Department of Therapeutic Chemistry National Research Centre

Objective:To investigate the role of zinc in reducing the deleterious effects of cadmium on male ***:Rats were injected subcutaneously with CdCl_2 and ZnCl_2 at dose level of2.2 mg/kg(1/40 of LD50 of cadmium per day).Results:The rats treated with cadmium exhibited a significant increase in levels of testicular malondialdehyde,tumor necrosis factor-alpha,nitrogen oxide and inducible nitrogen oxide synthase immunostaining reaction,as well as an elevation of blood hydroperoxide and follicle stimulating *** addition,a significant decrease in testicular ascorbic acid,zinc,reduced glutathione,catalase,superoxide dismutase,sex organ weight,plasma testosterone and luteinizing hormone were observed in the cadmium *** motility and count were decreased with cadmium treatment,while sperm abnormalities elevated *** treatment was found to mitigate the toxic effects of cadmium on oxidative stress,spermatogenesis,sex hormones,and inflammatory *** injected with cadmium showed intense histopathological *** manifested protective role and markedly reduced tissues damage induced by ***:The protective effect of zinc can be attributed to its antioxidant and antiinflammatory properties.

关键词： Zinc Cadmium Oxidative stress Immunohistochemistry Sperms Inflammatory markers

Electrochemical Detection of the Different Species of Levofloxacin Using PVC,Carbon Paste and Screen‑Printed Electrodes:Effect of pH

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Journal of Analysis and Testing 2018年第2期2卷 175-183页

作者： Nour ElDin T.abdel Ghani Fatehy M.abdel‑Haleem Sonia mahmoud Rasha M.El Nashar Chemistry Department Faculty of ScienceCairo UniversityGizaEgypt

The zwitterionic compound,levofloxacin,was determined for the first time at different pH values in pure samples,pharmaceutical preparations and spiked serum and urine *** types of potentiometric sensors including poly(vinyl chloride)membrane electrode,carbon paste electrode and screen printed electrode,containing the ion pair levofloxaciniumphosphomolybdate as the electroactaive species,were used for this *** effect of pH is the key factor in determining the ratio of the different species that can exist in the medium(zwitterionic,monocationic,dicationic,anionic and neutral),and so it is the controller of the electrochemical *** different sensors were fully characterized and optimized in terms of composition,pH effect,selectivity,response and *** different sensors showed reliable reversibility and could be utilized for the determination of the drug in real spiked physiological fluids with reliable recovery values.

关键词： Levofloxacin Zwitterionic Poly(vinyl-chloride)(PVC)membrane electrode Carbon paste electrode(CPE) Screen-printed electrode(SPE)

Spontaneous bacterial peritonitis:risk factors and causative organisms

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Asian Pacific Journal of Tropical Medicine 2009年第6期2卷 52-58页

作者： mahmoud M Al-Bendary mahmoud abdel-Aziz Waleed A Al-Sherbeeny Raghda El-Sayed Farag abdel-Hady El-Gilany Mohammad Hosam Eldeen Zaghloul Tropical Medicine Unit Community Medicine DepartmentCollege of MedicineMansoura UniversityEgypt Clinical Pathology Department College of MedicineMansoura UniversityEgypt

Objective:To determine the prevalent pathogens responsible for spontaneous bacterial peritonitis(SBP) and their sensitivity pattern,to test the efficiency of different culture techniques in microbial isolation,and to study the diagnostic predictors of such ***:One hundred eight SBP episodes from 92 adult patients were compared to 88 cirrhotic ascites patients cross - matched with age and sex without *** fluid was subjected to cytological,biochemical examination and culture on both conventional and blood culture bottles at the bedside for bacterial identification and antimicrobial susceptibility ***:The prevalence of SBP was 25.02%.Logistic regression analysis revealed that;previous SBP episode,low ascitic fluid protein levels, high serum creatinine and low serum albumin levels were the independent significant predictors of *** forty - five per cent of SBP episodes were detected by conventional culture compared to 73.15%by modified technique with a significant *** - negative bacteria were the cause of SBP in 46(58.23%) culture positive *** coli and Staphylococcus aureus were the most commonly detected organisms. Resistance to different antibiotics was ***:Culture of ascitic fluid in blood culture bottles at bedside increases the sensitivity of SBP *** is a recent increase in Gram - positive pathogen with emergence of multidrug *** recent changes may have an impact on guidelines for management and treatment of SBP in our locality.

关键词： Spontaneous bacterial peritonitis Paracentesis Bedside inoculation Blood bottle culture

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道路交通安全规划理论研究前沿

中国公路学报 2014年第9期27卷 90-97,118页

作者：黄合来许鹏鹏马明 abdel-aty M 中南大学交通运输工程学院湖南长沙410075 交通运输部规划研究院北京100028 中佛罗里达大学

为了提高交通安全管理水平,全面提出交通安全规划的基本理念和发展框架,提炼其特征,从战略和战术2个方面阐释美国交通安全规划研究脉络和主要成果,总结交通安全规划的研究热点及技术难点,结合中国道路交通安全现状,提出有效推进交通安... 详细信息

为了提高交通安全管理水平,全面提出交通安全规划的基本理念和发展框架,提炼其特征,从战略和战术2个方面阐释美国交通安全规划研究脉络和主要成果,总结交通安全规划的研究热点及技术难点,结合中国道路交通安全现状,提出有效推进交通安全规划理论研究和实践探索的对策。研究结果表明:交通安全规划理论是当前国际道路交通业界和学界最为前沿的研究方向之一,其考虑将主动安全贯穿于交通系统建设和运营全过程,强调从宏观规划层面到微观设计层面对安全水平的预测和规划,有望带来传统交通规划方法和交通安全工程与管理方法的双向革新。

关键词：交通工程交通安全规划综述事故预测模型

ANALYTICAL MODELS BASED DISCRETE-TIME QUEUEING FOR THE CONGESTED NETWORK

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International Journal of Modeling, Simulation, and Scientific Computing 2012年第1期3卷 68-89页

作者： MOFLEH AL-DIABAT HUSSEIN abdel-JABER FADI THABTAH OSMAN ABOU-RABIA mahmoud KISHTA Computer Science Department Al-al-Bayt University Jordan Department of Computer Science The World Islamic Sciences&Education(W.I.S.E.)University Amman Jordan Management Information System Department Philadelphia University AmmanJordan Department of Mathematics and Computer Science Laurentian University Sudbury ONCanada Dean of Academic Research Philadelphia University AmmanJordan

Congestion is one of the well-studied problems in computer networks,which occurs when the request for network resources exceeds the buffer *** active queue management techniques such as BLUE and RED have been proposed in the literature to control congestions in early *** this paper,we propose two discrete-time queueing network analytical models to drop the arrival packets in preliminary stages when the network becomes *** first model is based on Lambda Decreasing and it drops packets from a probability value to another higher value according to the buffer *** the second proposed model drops packets linearly based on the current queue *** compare the performance of both our models with the original BLUE in order to decide which of these methods offers better quality of *** comparison is done in terms of packet dropping probability,average queue length,throughput ratio,average queueing delay,and packet loss rate.

关键词： Analytical models congestion control discrete-time queueing simulation