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Predictors and Effects of Persistent Hypertension after Successful Treatment of Coarctation of the Aorta

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Congenital Heart Disease 2022年第3期17卷 325-333页

作者： mohamed Saber hafez Alaa Roushdy Dina Ezzeldin Ain Shams University CairoEgypt

Background:Coarctation of the aorta is a congenital heart disease that sometimes remains clinically silent until adulthood,usually presenting with arterial *** is well known that after coarctation treatment,many patients remain hypertensive despite successful *** this study we approached the predictors and effects of residual hypertension after successful coarctation ***:It was a cross sectional observational study involving 50 patients who underwent Coarctation repair/angioplasty in Ain Shams university *** divided the patients into two groups(hypertensive and normotensive)and we studied their demographic data(e.g.,age,gender,age at first repair,follow up period,etc.)to conclude the possible predictors of persistent hypertension in such *** also performed full echocardiographic assessment including 3D speckle tracking echocardiography to detect subtle changes in left ventricular systolic ***:Hypertensive patients had significantly higher BMI(29.1 kg/m^(2))as compared to normotensives(24 kg/m^(2)),p<*** at first CoA intervention was significantly higher in hypertensive *** patients had significantly lower 3D left ventricular strain measures(Global area strain,global circumferential strain and global longitudinal strain).The incidence of bicuspid aortic valve was significantly higher in the hypertensive group,yet it was not an independent predictor of persistent ***:The predictors for residual hypertension post successful CoA repair were late intervention and higher *** aortic valve was more common in the hypertensive *** the effects of such disease domain,treated CoA patients with persistent hypertension tended to have higher LV mass index and lower values of LV deformation.

关键词： Coarctation arterial hypertension speckle tracking left ventricular strain

Controlled drainage in the Nile River delta of Egypt:a promising approach for decreasing drainage off-site effects and enhancing yield and water use efficiency of wheat

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Journal of Arid Land 2023年第4期15卷 460-476页

作者： mohamed K EL-GHANNAM Fatma WASSAR Sabah MORSY mohamed hafez Chiter M PARIHAR Kent O BURKEY Ahmed M ABDALLAH Soil Water and Environment Research InstituteAgricultural Research CenterGiza 12112Egypt Higher Institute of Water Sciences and Techniques of Gabès University of GabèsGabès 6072Tunisia Institute of Arid Regions Medenine 4119Tunisia Crop Science Department Faculty of AgricultureDamanhour UniversityDamanhour 22516Egypt Land and Water Technologies Department Arid Lands Cultivation Research InstituteCity of Scientific Research and Technological ApplicationsNew Borg El-Arab 21934Egypt Indian Council of Agricultural Research(ICAR)-Indian Agricultural Research Institute(IARI) New Delhi 110012India United States Department of Agriculture(USDA)-Agricultural Research Services(ARS) Plant Science Research UnitNorth Carolina 27607USA Natural Resources and Agricultural Engineering Department Faculty of AgricultureDamanhour UniversityDamanhour 22516Egypt

North Africa is one of the most regions impacted by water *** implementation of controlled drainage(CD)in the northern Nile River delta of Egypt is one strategy to decrease irrigation,thus alleviating the negative impact of water *** study investigated the impacts of CD at different levels on drainage outflow,water table level,nitrate loss,grain yield,and water use efficiency(WUE)of various wheat *** levels of CD,i.e.,0.4 m below the soil surface(CD-0.4)and 0.8 m below the soil surface(CD-0.8),were compared with subsurface free drainage(SFD)at 1.2 m below the soil surface(SFD-1.2).Under each drainage treatment,four wheat cultivars were grown for two growing seasons(November 2018–April 2019 and November 2019–April 2020).Compared with SFD-1.2,CD-0.4 and CD-0.8 decreased irrigation water by 42.0%and 19.9%,drainage outflow by 40.3%and 27.3%,and nitrate loss by 35.3%and 20.8%,*** CD treatments,plants absorbed a significant portion of their evapotranspiration from shallow groundwater(22.0%and 8.0%for CD-0.4 and CD-0.8,respectively).All wheat cultivars positively responded to CD treatments,and the highest grain yield and straw yield were obtained under CD-0.4 *** the initial soil salinity as a reference,the soil salinity under CD-0.4 treatment increased two-fold by the end of the second growing season without negative impacts on wheat *** the drainage system by raising the outlet elevation and considering shallow groundwater contribution to crop evapotranspiration promoted water-saving and *** responses could be obtained based on the different plant tolerance to salinity and water stress,crop characteristics,and growth ***-specific soil salinity management practices will be required to avoid soil salinization due to the adoption of long-term shallow groundwater in Egypt and other similar agroecosystems.

关键词： drainage ratio nitrate loss water use efficiency yield soil salinity Nile River delta

Self-Tuning Parameters for Decision Tree Algorithm Based on Big Data Analytics

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计算机、材料和连续体（英文） 2023年第4期75卷 943-958页

作者： Manar mohamed hafez Essam Eldin F.Elfakharany Amr A.Abohany Mostafa Thabet College of Computing and Information Technology Arab Academy for ScienceTechnology&Maritime TransportCairoEgypt Faculty of Computers and Information Kafrelsheikh UniversityKafrelsheikhEgypt Faculty of Computers and Information Fayoum UniversityFayoumEgypt

Big data is usually unstructured, and many applications require theanalysis in real-time. Decision tree (DT) algorithm is widely used to analyzebig data. Selecting the optimal depth of DT is time-consuming process as itrequires many iterations. In this paper, we have designed a modified versionof a (DT). The tree aims to achieve optimal depth by self-tuning runningparameters and improving the accuracy. The efficiency of the modified (DT)was verified using two datasets (airport and fire datasets). The airport datasethas 500000 instances and the fire dataset has 600000 instances. A comparisonhas been made between the modified (DT) and standard (DT) with resultsshowing that the modified performs better. This comparison was conductedon multi-node on Apache Spark tool using Amazon web services. Resultingin accuracy with an increase of 6.85% for the first dataset and 8.85% for theairport dataset. In conclusion, the modified DT showed better accuracy inhandling different-sized datasets compared to standard DT algorithm.

关键词： Big data classification decision tree Amazon web services

Femoral lengthening in young patients:An evidence-based comparison between motorized lengthening nails and external fixation

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World Journal of Orthopedics 2021年第11期12卷 909-919页

作者： mohamed hafez Nicolas Nicolaou Amaka C Offiah Stephen Giles Sanjeev Madan James A Fernandes Department of Oncology and Metabolism Sheffield UniversitySheffield S102TNUnited Kingdom Department of Paedaiatric Limb Reconstruction Sheffield Children HospitalSheffield S102THUnited Kingdom Department of Radiology Sheffield Children HospitalSheffield S102THUnited Kingdom Department of Trauma and Orthopaedics Sheffield Children HospitalSheffield S102ThUnited Kingdom

BACKGROUND Femoral lengthening is a procedure of great importance in the treatment of congenital and acquired limb *** advances have led to the latest designs of fully implantable motorized intramedullary lengthening *** use of these nails has increased over the last few *** To review and critically appraise the literature comparing the outcome of femoral lengthening in children using intramedullary motorized lengthening nails to external *** Electronic databases(MEDLINE,CINAHL,EMBASE,Cochrane)were systematically searched in November 2019 for studies comparing the outcome of femoral lengthening in children using magnetic lengthening nails and external *** outcomes included amount of gained length,healing index,complications and patient reported *** Of the 452 identified studies,only two(retrospective and non-randomized)met the inclusion criteria.A total of 91 femora were *** both studies,the age of patients treated with nails ranged from 15 to 21 years compared to 9 to 15 years for patients in the external fixation *** devices achieved the target *** of adverse events was less in the nail(60%-73%)than in the external fixation(81%-100%)*** of the studies presented patient reported *** The clinical effectiveness of motorized nails is equivalent or superior to external fixation for femoral lengthening in young *** available literature is limited and does not provide evidence on patient quality of life or cost effectiveness of the interventions.

关键词： Lengthening nails Motorized nails Distraction ostepgenesis Lengthening

RESPIRATORY DISEASES OF POULTRY:DIAGNOSIS AND CONTROL APPROACHES

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RESPIRATORY DISEASES OF POULTRY:DIAGNOSIS AND CONTROL APPROA...

含摩擦和加热的跨声速流动数值模拟研究（英文）

中国畜牧兽医学会2014年学术年会

作者： hafez mohamed hafez Institute of Poultry Diseases Free University Berlin

Respiratory diseases of poultry are associated with severe economic losses,due to high mortality,high medication cost,drop in egg production in layer and breeder flocks and in many cases low fertility and *** breeder ...

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来源： cnki会议评论

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空气动力学学报 2016年第2期34卷 175-181页

作者： William E.Tavernetti mohamed M.hafez University of California Davis USA

喷管中跨声速流动的反应流体动力学是实验和理论研究的一个重要领域。本文主要由两部分构成,在第一部分中对文献[2]中的Murman格式[1]的一般形式进行了简化,得到了守恒形式的欧拉方程,并对其求解方法进行了讨论,同时针对Chattot等的工... 详细信息

喷管中跨声速流动的反应流体动力学是实验和理论研究的一个重要领域。本文主要由两部分构成,在第一部分中对文献[2]中的Murman格式[1]的一般形式进行了简化,得到了守恒形式的欧拉方程,并对其求解方法进行了讨论,同时针对Chattot等的工作展开了分析,并给出了带激波的流动计算结果;而文章的第二部分则研究了包含摩擦、加热以及耗散的跨声速流动,并重点关注了一步Arrhenius化学反应模型下的爆震现象。本文还探究了摩擦力和带燃烧的跨声速流动之间的相互作用,同时详细给出了新的欧拉方程数值求解算法并同已有文献算例进行了对比验证。

关键词：数值算法计算流体力学燃烧欧拉方程摩擦力加热可压缩

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火鸡疫病:对兽医的新挑战

中国家禽 2007年第19期29卷 8-11页

作者： hafez mohamed hafez 张培君德国柏林自由大学兽医系禽病研究所　

现代火鸡业的发展面临着市场竞争、饲料价格、法律法规、动物福利、食品安全及疫病等因素的影响。作者从兽医师的角度指出,应对这些挑战,除了加强疫病的早期监测,还必须实施综合教育、强化管理和生物安全等措施。

关键词：火鸡致病性疫病禽流感病毒流感病毒群弯曲杆菌属弯杆菌属螺旋菌科兽医师禽类产品遗传选择

Accuracy of Sentinel Lymph Node Biopsy after Neoadjuvant Chemotherapy in Breast Cancer Patients;Single Center Experience

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Surgical Science 2018年第1期9卷 52-61页

作者： Waleed Elnahas Omar Hamdy Khaled Abdel Wahab Sameh Roshdy Sara Raafat mohamed hafez Omar Farouk mohamed Elmetwally Surgical Oncology Unit Mansoura Oncology Centre Mansoura University Mansoura Egypt Pathology Department Faculty of Medicine Mansoura University Mansoura Egypt

Purpose: Most important factor affecting prognosis of breast cancer is axillary nodal involvement. Several studies evaluated the accuracy of Sentinel lymph node biopsy in breast cancer patients post neoadjuvant chemotherapy. In this study, we will examine accuracy and feasibility of using Sentinel lymph node biopsy in predicting axillary lymph node status in breast cancer patients after neoadjuvant chemotherapy. Methods: 45 female patients with resectable, nonmetastatic breast carcinoma cases who received neoadjuvant chemotherapy were enrolled in this study according to the routine Mansoura Oncology Center—guidelines of management of breast cancer. Methylene blue dye used for detection of Sentinel lymph node. Results: Successful Sentinel lymph node detection was 82.2%. Skin involvement (T4 disease) were linked to a low identification (P = 0.005). False negative rate equals 11/27 = (40.7%).With advancement of the stage of the tumor, the incidence of false negative results increases significantly (p = 0.012) with 95% confidence interval;1.2 - 5.4. Conclusion: Sentinel lymph node should be adopted to be the standard method for axillary staging with T1-3 tumors after receiving neoadjuvant chemotherapy, in T4 patients, it is associated with low detection rate & high false negative rate making it doubtful technique for axillary staging.

关键词： Breast Cancer Sentinel Lymph Node Neo Adjuvant Chemotherapy Blue Dye

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新出现和再流行的禽病

国外畜牧学（猪与禽） 2003年第6期23卷 51-55页

作者：莫胜兰 hafez mohamed hafez 德国柏林自由大学禽病学院

家禽疾病一直对社会经济和公众健康产生重要影响。近年来,人们对于食源性细菌感染和抗药菌株的出现更加关注,而且在一些国家中还掀起了重大的政治事件。本文就新出现和再次流行的家禽疾病综述了其主要的研究进展。

关键词：禽病禽流感感染原因坏死性肠炎症状流行特点