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Chinese Journal of Chemical Engineering 2022年第11期51卷 75-85页

作者： mohamed A.Almaradhi Hassan M.A.Hassan Mosaed S.Alhumaimess Department of Chemistry College of ScienceJouf UniversityPO Box 2014SakakaSaudi Arabia

Suzuki-Miyaura(S-M)is regarded the most powerful way for synthesis biaryls,triaryls,or incorporating of substituted aryl moieties in organic preparation by the cross-coupling of aryl boronic acid with aryl halides using the Pd *** work reports the combining of the hydrothermal and microwaveassisted protocol to convert the glucose to magnetic carbon spheres(Fe_(3)O_(4)-CSPs)decorated with Pd nanoparticles(NPs)as the catalyst for Suzuki-Miyaura cross-coupling *** physicochemical properties in the produced composite were examined using FESEM,HRTEM,nitrogen isotherms,Raman spectroscopy,FTIR,XPS,and *** as-fabricated composite Pd/Fe_(3)O_(4)-CSPs is mostly spherical with a core–shell structure and possesses a great surface area of 253.2 m^(2).g^(-1).Its catalytic performance demonstrates that the composite has excellent stability and high tolerance Suzuki-Miyaura crosscoupling reactions in 30 min at 80℃.Both activated and deactivated aryl halides provided excellent *** as-fabricated catalyst was recycled for up to four catalytic cycles without a substantial decline in ***,this research offers a facile roadmap for synthesizing Pd/Fe_(3)O_(4)-CSPs composites and promoting the practical implementation of Pd/Fe_(3)O_(4)-CSPs catalysts for organic transformation processes.

关键词： Heterogeneous catalysis Aryl halide Suzuki coupling Palladium nanoparticles Carbon spheres

Preparation and Characterization of Eco-friendly Carboxymethyl Cellulose Antimicrobial Nanocomposite Hydrogels

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Journal of Renewable Materials 2018年第5期6卷 536-547页

作者： Sawsan Dacrory Hussein Abou-Yousef Ragab E.Abou-Zeid Samir Kamel mohamed S.Abdel-Aziz mohamed Elbadry Cellulose and Paper Department National Research Centre33 El Buhouth St.DokkiGiza 12622Egypt Microbial Chemistry Department National Research Centre33 El Buhouth St.DokkiGiza 12622Egypt Department of Chemistry Faculty of ScienceAin Shams UniversityAbbassiaCairo 11566Egypt

Carboxymethyl cellulose hydrogels were developed through crosslinking process using eco-friendly crosslinkers such as maleic,succinic,and citric *** cellulose was prepared from the cellulosic fraction of olive industry residues.A series of hydrogels with varying crosslinker acid concentrations,reaction times,and reaction temperatures was produced to study the swelling capacities and gel fraction of the obtained *** study pertains to the preparation of antimicrobial nanocomposite hydrogels through in-situ incorporation of the silver nanoparticles during the crosslinking *** nanoparticles were prepared by reduction of AgNO3 with leaves of Ricinus *** particle size of prepared silver nanoparticles was detected by transmission electron microscopy(TEM).Chemical structure and morphological characterizations of the prepared hydrogels were performed using Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy(SEM),and energy-dispersive X-ray spectroscopy(EDX).Finally,the antimicrobial activity of the loaded silver hydrogels against gram negative(g-ve),gram positive(g+ve),and Candida albicans yeast was demonstrated.

关键词： Hydrogel crosslinked carboxymethyl cellulose silver nanoparticles antibacterial activity

A simulation-based method to investigate occupant-centric controls

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Building Simulation 2021年第4期14卷 1017-1030页

作者： mohamed M.Ouf June Young Park H.Burak gunay Department of Building Civil and Environmental EngineeringConcordia University1515Rue Sainte-Catherine O.MontrealQCH3G 1MCanada Department of Civil Engineering The University of Texas at ArlingtonArlingtonTX76019USA Department of Civil Engineering Carleton University1125 Colonel By DriveOttawaONK1S 5B6Canada

Occupant-centric control (OCC) strategies rely on different algorithms to learn and predict occupants’ patterns and preferences, then utilize these predictions to optimize building operations. However, testing different OCC algorithms or fine-tuning their configurations in real buildings can be a lengthy process. To this end, we present a framework for testing OCCs in a simulation environment prior to field implementation. The proposed workflow entails using synthetic occupant behaviour models and simulating OCC strategies to learn their preferences. The goal is to enable quick comparison of different OCC configurations under various scenarios by modifying occupant behaviour assumptions, as well as climate and design parameters. For proof-of-concept, the proposed method was applied in a case-study to simulate OCCs for lighting and heating/cooling setpoint adjustments in a single office under various occupant types, as well as OCC settings and design configurations. Results demonstrated the benefits of the proposed framework and its potential for providing a more holistic evaluation of OCCs under different scenarios. Using the proposed framework, building designers and operators can identify potential issues with OCCs and fine-tune their settings prior to field implementation.

关键词： occupant-centric controls building simulations energy efficiency comfort building operations lighting HVAC controls

Artificial Algae Optimization with Deep Belief Network Enabled Ransomware Detection in IoT Environment

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Computer Systems Science & Engineering 2023年第8期46卷 1293-1310页

作者： Mesfer Al Duhayyim Heba g.mohamed Fadwa Alrowais Fahd N.Al-Wesabi Anwer Mustafa Hilal Abdelwahed Motwakel Department of Computer Science College of Sciences and Humanities-AflajPrince Sattam bin Abdulaziz UniversityRiyadhSaudi Arabia Department of Electrical Engineering College of EngineeringPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Department of Computer Science College of Science and Art at MuhaeylKing Khalid UniversityAbhaSaudi Arabia Department of Computer and Self Development Preparatory Year DeanshipPrince Sattam bin Abdulaziz UniversityAlKharjSaudi Arabia

The Internet of Things(IoT)has gained more popularity in research because of its large-scale challenges and *** security was the main concern when witnessing the fast development in its applications and *** was a dreary task to independently set security systems in every IoT gadget and upgrade them according to the newer ***,machine learning(ML)techniques optimally use a colossal volume of data generated by IoT *** Learning(DL)related systems were modelled for attack detection in *** the current security systems address restricted attacks and can be utilized outdated datasets for *** study develops an Artificial Algae Optimization Algorithm with Optimal Deep Belief Network(AAA-ODBN)Enabled Ransomware Detection in an IoT *** presented AAAODBN technique mainly intends to recognize and categorize ransomware in the IoT *** presented AAA-ODBN technique follows a three-stage process:feature selection,classification,and parameter *** the first stage,the AAA-ODBN technique uses AAA based feature selection(AAA-FS)technique to elect feature ***,the AAA-ODBN technique employs the DBN model for ransomware *** last,the dragonfly algorithm(DFA)is utilized for the hyperparameter tuning of the DBN technique.A sequence of simulations is implemented to demonstrate the improved performance of the AAA-ODBN *** experimental values indicate the significant outcome of the AAA-ODBN model over other models.

关键词： Internet of things deep learning cybersecurity ransomware detection feature selection

High platelet distribution width can independently predict testicular survival in testicular torsion among patients with steady-state sickle cell anemia

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World Journal of Pediatric Surgery 2022年第1期5卷 12-17页

作者： Essa A Adawi Mazen Ahmed ghanem Ahmed Mazen ghanem Manal A Safan mohamed g Elsayed Mohammed A Aqeel Urology Jazan UniversityJazanSaudi Arabia Urology Menoufia University Faculty of MedicineAI Rehab CityNew CairoEgypt gP Cairo University Kasr Alainy Faculty of MedicineAI Rehab CityNew CairoEgypt Department of Medical Biochemistry and Molecular Biology Menoufia University Faculty of MedicineAI Rehab CityNew CairoEgypt Pediatric Surgery Jazan UniversityJazanSaudi Arabia Department of Anesthesia and Critical Care Jazan UniversityJazanSaudi Arabia

Objective This study aimed to evaluate the predictive value of platelet volume indices(PVI),such as mean platelet volume(MPV),platelet distribution width(PDW),and plateletcrit(PCT),as prognostic indicators of testicular viability in torsion patients with steady-state sickle cell anemia(SCA)who underwent surgical *** Forty-eight patients with SCA with testicular torsion and 46 male control subjects were enrolled in the *** patients underwent scrotal color Doppler ultrasonography before surgery,and PVI(MPV,PDW,and PCT)values were measured in all *** duration and testicular volume were also *** The testicular salvage rate in patients with SCA was 73%after *** showed that MPV,PDW,and PCT values were significantly higher in torsed SCA as compared with controls(pgnificantly higher MPV,PDW,and PCT values than the orchiopexy group(pgher significant cut-off of≥11.5 fL,which is higher than in torsed patients without SCA,as an indicator of testis *** also demonstrated a higher significant cut-off of≥12.7 fL for detorsion outcomes in patients with *** duration of less than 7 hours was also significantly correlated with orchiopexy(p≤0.001).Univariate analysis showed that higher MPV,increased PDW,and symptom duration were indicative of the outcome of testicular detorsion in *** analysis showed that increased PDW and symptom duration are prognostic parameters for testicular viability in *** Increased PDW and symptom duration can be used as parameters for predicting testicular detorsion outcomes in patients with steady-state SCA.

关键词： patients anemia torsion

Energy Decay of Solutions to a Nondegenerate Wave Equation with a Fractional Boundary Control

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Journal of Partial Differential Equations 2021年第3期34卷 201-223页

作者： TAHRI mohamed BENKHEDDA Hanane BENAISSA Abbes Laboratory of Analysis and Control of PDEs Djillali Liabes UniversityP.O.Box 89Sidi Bel Abbes 22000Algeria

In this paper,we study the energy decay rate for a one-dimensional nondegenerate wave equation under a fractional control applied at the *** proved the polynomial decay result with an estimation of the decay *** resul... 详细信息

关键词： Nondegenerate wave equation fractional boundary control Frequency domain method Optimal polynomial stability

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)),pgnificantly 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

Hypertensive disorders in pregnancy

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World Journal of Nephrology 2016年第5期5卷 418-428页

作者： Casey Berry mohamed g Atta Department of Medicine Division of NephrologyJohns Hopkins University School of MedicineBaltimoreMD 21287United States

Renal injury or failure may occur in the context of pre-gnancy requiring special considerations with regard to fetal and maternal health. The condition of pregnancy itself may be a major factor in such injuries. In addition,for many young women previously known to be healthy, pregnancy may be the frst presentation for routine urine and blood testing which may yield previously subclinical renal disease. As such, pregnancy may add complexity to considerations in the management of renal disease presenting coincidentally requiring knowledge of the physiologic changes and potential renal disorders that may be encountered during pregnancy.

关键词： Pregnancy Hypertension Preeclampsia Hemolysis, elevated liver enzymes, and low platelets

Characteristics,composition and functional properties of seeds,seed cake and seed oil from different Brassica carinata genotypes

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Food Bioscience 2022年第4期48卷 300-309页

作者： Adel Abdelrazek Abdelazim Mohdaly mohamed Fawzy Ramadan Food Science and Technology Department Faculty of AgricultureFayoum UniversityEl-FayoumP.O.63514Egypt Agricultural Biochemistry Department Faculty of AgricultureZagazig UniversityZagazigP.O.44519Egypt Deanship of Scientific Research Umm Al-Qura UniversityMakkahP.O.715Saudi Arabia

Carinata(Brassica carinata)is an oilseed crop with potential in biofuel production and livestock *** present research was conducted to evaluate twenty Brassica carinata genotypes used in breeding programs to develop commercial production of Brassica carinata with low levels of erucic *** following characters were evaluated:oil contents,fatty acid profiles,physicochemical characteristics of oils,as well as the content of protein,total phenolic compounds,and the antiradical activity of Brassica carinata defatted seed *** oil analysis indicated desirable quality,including low percentages of free fatty acids(FFA),high amounts of unsaponifiable matter(USM),and low values for primary and secondary oxidation products that were under the regulated *** oil contents of the samples varied between 27.0 and 39.2%.A total of 16 fatty acid compositions were identified in different *** compared to the commercial canola oil,it was observed that Brassica carinata 14C genotype had quite similar fatty acid *** phenolics and protein contents of Brassica carinata cake extract varied from 43.2 to 132 mg/100 g and from 24.6 to 35.4%,*** can be noted that Brassica carinata genotype 14C with low erucic acid(EA)and high oleic acid contents consider as an edible oil *** EA,the genotypes 3C,10C,and 17C with low EA content could be recommended as a basis for further breeding *** carinata cake from different genotypes might be a valuable source of natural antioxidants due to their antioxidant capacities and free radical scavenging potential.

关键词： Brassicaceae Cruciferae Canola Physicochemical properties Erucic acid Phenolics Antioxidants Seed cake Breeding

Experimental Study on the Hydraulic Performance of Nonwoven geotextile as Subsurface Drain Filter in a Silty Loam Area

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Experimental Study on the Hydraulic Performance of Nonwoven ...

作者： mohamed Monir mohamed Ramadan Elzoghby 扬州大学

学位级别：硕士

长江流域地势平坦且较为潮湿,为确保这些土地的可运输性和作物生长,必须进行人工排水。在这些地区,多用明渠来排除多余水分,但为了提高土地利用效率并促进农业机械的日益增长的使用,越来越地需要使用暗管来代替这些明渠。选择合适的滤... 详细信息

长江流域地势平坦且较为潮湿,为确保这些土地的可运输性和作物生长,必须进行人工排水。在这些地区,多用明渠来排除多余水分,但为了提高土地利用效率并促进农业机械的日益增长的使用,越来越地需要使用暗管来代替这些明渠。选择合适的滤料是成功安装暗管的前提,级配砂石是常用的滤料之一,它可以使土壤中的水平稳地流入排水管道,同时防止过多的土壤颗粒进入管道或引起堵塞。但级配合适的砂石通常较为昂贵,且不便于暗管的机械安装工作。因此推荐使用土工布作为暗管的替代滤料。根据报道,土工布的成本较低,且具有易于运输和机械安装的特点。由于土壤性质复杂,所选土工布的特性也随种类不同而有较大差异,因此很难预测土工布-土壤系统的过滤性能,为特定土壤选择合适的土工布滤层就显得尤为重要。土工布滤层的主要功能是限制细小的土壤颗粒进入排水管,同时减轻土壤孔隙水压力。土工布的过滤效果受诸多因素影响,包括土工布特性、土壤颗粒分布和流动条件。土工布通常会受到各种堵塞的影响,包括物理淤堵,化学淤堵和生物淤堵。当细小的土壤颗粒在水力作用和重力作用的影响下悬浮在土工布的孔隙上,就会发生物理堵塞。土工布堵塞会降低整个排水系统的排水性能和长期稳定性;因此,有必要防止这种堵塞用以确保排水系统的排水效果。土工布的堵塞量和淤堵率能较好表示出土工布的抗淤堵能力。存在几种评估稳态流动条件下土工布-土壤组合系统过滤性能的方法。梯度比测试是评估土工布-土壤系统过滤性能的最常用方法。渗透性测试和图像分析用以量化土工布的堵塞程度。同时还包括系统长期流量测试和渗透系数测试。一些研究报告了使用多种土工材料的土工布-土壤系统的过滤性能。这些研究针对不同类型的土壤条件,例如淤泥/粉质粘土,港口沉积物/粉煤灰和黏土/粉质粘土。这些研究均认为,部分土工布滤层可以满足地下排水管的过滤要求。一些实际应用也表明,针对性选取的土工布和波纹塑料管组成的排水系统具有良好的透水性,可以满足当地的土壤排水要求。沿运灌区位于中国长江流域的下游,地处大运河扬州段沿岸。该地区土壤普遍是粉质壤土,这些土壤对排水滤层有较高的要求。近些年来,该地区大力提倡地下排水暗管的建设,以提高农业的机械化水平。为了检验土工布滤层用于粉质壤土的可行性,本文进行了一项室内实验,通过与传统的砂石滤层进行比较来评估2种土工布的水力性能。本研究的具体目标为:1)比较所选土工布滤层与砂石滤层的过滤排水效果;2)检查土壤特性对土工布性能的影响3)确定最重要的土壤特性指标,以选择合适的土工布滤层。研究技术方法1)研究地点和土壤性质测试土壤来自沿运灌区扬州段,深度约为0.8m,将土壤样品风干,然后通过2 mm筛网过筛,送至中国扬州大学的土壤物理实验室,使用马尔文3000激光衍射粒度分析仪分析土壤颗粒以及测试后取出的土壤颗粒。测试土壤的粒径根据美国农业部土壤分类标准为粉质壤土。土壤的颗粒组成是为暗管选择合适土工布滤层的重要指标。均匀系数（Cu）计算如下:Cu=d60/d10（1）其中d60和d10是粒径,表示60%和10%的粒径分别小于这些值。较高的Cu值（＞15）表示土壤具有良好的级配,排水管周围的土壤不易流失。而当Cu值在5到15之间时,土壤均匀程度一般,较为容易流失。当Cu＜5时,土壤很容易流失。通常认为粘粒/粉粒之比小于0.5且Cu较小时,土工布极有可能发生堵塞。在本研究中,供试土壤样品的黏粒/粉粒比为0.177,这表明土工布出现堵塞问题的可能性很高。2)土工布的选择为了降低土工布的淤堵概率,建议土工布孔径在2.5≥O90/d90≥1.0的标准内,并且O90/d90的值应接近选择标准的上限,土工布的厚度应尽可能≤1mm。而当O90/d90的值不在此范围内,选用土工布的厚度应大于1毫米。基于上述标准,本文选择了2种非织造土工布（Typar SF 27,Typar SF 20,以下称为g27和g20）,这2种土工布常用做农田暗管的外包滤层。2种土工布的渗透系数都大于供试土壤;同时它们具有很大的表观开口尺寸（A.O.S）,具有防堵塞和防淤塞特性,可防止土壤颗粒穿过土工布的孔隙进入暗管。渗透仪由一个内径为100 mm的透明有机玻璃圆柱体制成的。每个渗透仪内部的土壤样品高度为300毫米。水压计沿着圆柱安装在不同高度,以测量各处的水头。使用支撑网防止土工布变形,因为这可能会影响土工布的渗透性。将土工布夹在渗透仪中,然后将容积为1.33 g/cm3的土壤分层填入渗透仪中,用以代替研究区的田间条件。在试验开始前,从下至上将水注入渗透仪用以饱和土壤,随后改变水流方向,并在水位达到稳定状态时开始测试。在土壤样品的两端都放置了预饱和的多孔石,多孔石材的渗透率约为18 m/d,防止在仅有土壤和使用河砂滤层的组合中造成过多的土壤流失。在测试过程中,流动状态为层流,水力梯度保持在4.5,以表示野外

关键词：土工布围护材料地下排水水力传导率KS 实验室实验堵塞过滤