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Implementing Effective Learning with Ubiquitous Learning Technology During Coronavirus Pandemic

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Computer Systems Science & Engineering 2022年第1期40卷 389-404页

作者： Hosam F.El-Sofany samir A.El-Seoud King Khalid University AbhaKingdom of Saudi Arabia Cairo Higher Institute for Engineering Computer Science and ManagementCairoEgypt British University in Egypt—BUE Faculty of Informatics and Computer ScienceCairoEgypt

Ubiquitous computing supports U-learning to develop and implement a new educational environment that provides effective and interactive learning to students wherever they *** study aims to present a qualitative evaluation for using U-learning instead of traditional education to avoid the spread of the Coronavirus *** authors introduce a UTAUT(Unified Theory of Acceptance and Use of Technology)model to assess the capability of the given factors that are expected to affect the learners’intention and behavior for accepting the U-learning technology for full *** research study shows a promising impact on the use of U-learning apps for implementing their learning activities in both the present and coming *** study also presents the descriptive statistics that affect the students’answers by using U-learning while implementing learning assignments including exams,projects,forums,essays,presentations,and *** research experiments demonstrate both the composite reliability(CR)and the average variance extracted(AVE)of the presented *** experimental results have shown that(1)the factor loadings≥0.75,CR≥0.9,and AVE≥0.75,which present appropriate proof for the validity and reliability of the proposed model,and(2)the total average of students that accept the U-learning is 82.99%,and who disagree is 8.13%,while who neither agree nor disagree is 6.44%.

关键词： Ubiquitous learning U-learning E-learning M-learning COVID-19 pandemic coronavirus UTAUT model

Management of alcoholic hepatitis:Current concepts

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World Journal of Hepatology 2012年第12期4卷 335-341页

作者： Hetal A Karsan samir Parekh Atlanta Gastroenterology Associates Emory UniversityAtlantaGA 30342United States Emory University Liver Transplant Program AtlantaGA 30322United States

Alcoholic hepatitis is a devastating form of acute liver injury seen in chronic alcohol abusers with significant morbidity and *** is a multisystem disease that is precipitated by ingesting large quantities of alcohol with genetic and environmental factors playing a *** criteria have been developed to predict disease severity and these criteria can serve as indicators to initiate medical *** therapy remains abstinence and supportive care,as continued alcohol abuse is the most important risk factor for disease *** cornerstone of supportive care remains aggressive nutritional support,and although acute alcoholic hepatitis has been extensively studied,few specific medical therapies have been *** remain the most effective medical therapy available in improving short term survival in a select group of patients with alcoholic hepatitis;however,the long-term outcome of drug therapies is still not entirely clear and further clinical investigation is *** liver transplantation for acute alcoholic hepatitis have demonstrated promising results,this practice remains controversial and has not been advocated universally,with most transplant centers requiring a prolonged period of abstinence before considering *** liver support devices,although still experimental,have been developed as a form of liver support to give additional time for liver *** have the potential for a significant therapeutic option in the future for this unfortunately dreadful disease.

关键词： Alcholic hepatitis Acute liver injury Abstinence Nutrition Corticosteroids Transplantation Extracorporeal liver support

The Dynamics and Control of the Fractional Forms of Some Rational Chaotic Maps

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Journal of Systems Science & Complexity 2020年第3期33卷 584-603页

作者： OUANNAS Adel KHENNAOUI Amina-Aicha BENDOUKHA samir WANG Zhen PHAM Viet-Thanh Laboratory of Mathematics Informatics and Systems(LAMIS)University of Larbi TebessiTebessa 12002Algeria Department of Mathematics and Computer Sciences University of Larbi Ben M'hidiOum El BouaghiAlgeria Department of Electrical Engineering College of EngineeringYanbuTaibah UniversitySaudi Arabia Shaanxi Engineering Research Center of Controllable Neutron Source School of ScienceXijing UniversityXi'an 710123China Faculty of Electrical and Electronic Engineering Phenikaa Institute for Advanced Study(PIAS)Phenikaa UniversityYen NghiaHa Dong districtHanoi 100000Vietnam Phenikaa Research and Technology Institute(PRATI) A&A Green Phoenix Group167 Hoang NganHanoi 100000Vietnam

This paper proposes three fractional discrete chaotic systems based on the Rulkov,Chang,and Zeraoulia–Sprott rational *** dynamics of the proposed maps are investigated by means of phase plots and bifurcations *** stabilization schemes are proposed for each of the three maps and the convergence of the states is established by using the Lyapunov ***,a combination synchronization scheme is proposed whereby a combination of the fractional Rulkov and Chang maps is synchronized to the fractional Zeraoulia-Sprott *** results are used to confirm the findings of the paper.

关键词： Fractional discrete chaos fractional rational maps stabilization synchronization

Comparison of Effect of Intermediate Segment and Short Segment Pedicle Screw Fixation for Surgical Treatment of Thoracolumbar Fracture

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Comparison of Effect of Intermediate Segment and Short Segme...

作者： samir Karki 吉林大学

学位级别：硕士

PURPOSE: Surgical treatment in the case of thoracolumbar fracture is very *** fixation is most frequently used compared to the anterior fixation;however, thenumber of levels to be instrumented still remains a matter of debate. We want to compare thesurgical outcomes of short segment and intermediate segment posterior fixation forthoracolumbar burst fracture in order to provide a theoretical basis for the better treatment ofthoracolumbar burst fracture.MATERIALS and METHODS: A total of36patients who had a single level Type A-3(AO classification) burst fracture between T11to L2were selected and were managedusing posterior instrumentation and fusion, no laminectomy or discectomy procedure wasdone. They were divided into two groups as follows;Group I (n=16) included patients whowere operated by intermediate segment posterior fixation (ISPF) that is two vertebrae aboveand one vertebrae below the fracture vertebrae or one vertebrae above and two vertebraebelow the fracture level, Group II (n=20) included patients who were operated by shortsegment posterior fixation (SSPF) that is one vertebrae above and one vertebrae below thefracture vertebrae. The mean follow up period was11months ranging from6months to15months. The outcomes were analyzed in terms of Cobb’s Angle (CA), Sagittal Index (SI)and Anterior Body Height (ABH).RESULT: Both short segment and intermediate segment posterior transpedicular fixationhave good outcomes in the treatment of thoracolumbar fractures in terms of correction ofCobb’s angle, Sagittal index and Anterior body height. A statistically significant differencebetween the two study groups was noted for the immediate post op of the Cobb’s angle(p=0.031), sagittal index (p=0.048) as well as on the Cobb’s angle (p=0.024) and anteriorbody height (p=0.045) on the final follow up.CONCLUSION: Both short segment and intermediate segment posterior transpedicularfixation are able for correcting the cobb angle, sagittal index, and

关键词： Thoracolumbar burst fracture posterior instrumentation intermediatesegment fixation short segment fixation

Improving of photocatalytic activity of barium ferrate via bismuth and copper co-doping for degradation of paracetamol under visible light irradiation

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Journal of Environmental Sciences 2022年第2期34卷 331-342页

作者： Hussien Ahmed Abbas Rabab Ahmed Nasr Rose-Noelle Vannier Tarek samir Jamil Inorganic Chemistry Department National Research CentreCairo 12622Egypt Water Pollution Control Department National Research CenterCairo 12622Egypt Univ.Lille CNRSCentrale LilleENSCLUniv.ArtoisUMR 8181Unite de Catalyse et Chimie du Solide(UCCS)Lille 59000France

Nanosized Ba_(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3)(12–50 nm)with x values of 0,0.01,0.05,and 0.1 system was prepared using the Pechini ***,morphological,surface and optical characterizations were performed for the prepared *** phase was the predominant phase for the undoped BaFeO_(3)and Bi and Cu co-doped BaFeO_(3)*** phases of monoclinic Ba_(2)Fe_(2)O_(5),orthorhombic BaFe_(2)O_(4)and orthorhombic BaCO_(3)were identified for all the prepared ***_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)sample has the lowest band gap(2.43 e V).98.1%paracetamol removal was achieved with 0.75 g/L of Ba_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)at pH9 after 120 *** paracetamol degradation follows the pseudo first-order ***·is the main oxidative species responsible for the paracetamol *** chromatography–mass spectrometry(GC–MS)analysis was performed at the end of the photocatalytic degradation experiment under optimum operating condition using Ba_(0.95)Bi_(0.05)Fe_(0.95)Cu_(0.05)O_(3)to explain the reaction mechanism and identify the intermediate by-products which is confirmed by ultraviolet/visible(UV/Vis)spectroscopy study at different reaction times.

关键词： Ba_(1-x)Bi_(x)Fe_(1-x)Cu_(x)O_(3) Photocatalytic degradation Nanomaterials Paracetamol

The Security Challenges of China’s Silk Road Economic Belt Initiative in the Southern Caucasus Region

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The Security Challenges of China’s Silk Road Economic Belt ...

作者： samir Mammadov 华中师范大学

学位级别：硕士

本研究探讨丝绸之路经济带项目在南高加索地区可能面临的安全挑战。研究人员探索并分析了该项目是如何实施的,以及哪些问题会对所需的丝绸之路经济带项目造成安全挑战。研究指出了三种可能的安全问题,并提出了预防措施。领土冲突的存在... 详细信息

本研究探讨丝绸之路经济带项目在南高加索地区可能面临的安全挑战。研究人员探索并分析了该项目是如何实施的,以及哪些问题会对所需的丝绸之路经济带项目造成安全挑战。研究指出了三种可能的安全问题,并提出了预防措施。领土冲突的存在被视为主要安全风险之一。本研究考察了难高加索地区国家的政治经济现状,并对其与中华人民共和国的关系进行了概述。数据显示,这三个国家对中国都持积极态度,都愿意吸引更多的中国投资到该地区。对华为驻高加索南部代表的采访表明,该地区的商业环境良好,中国企业和其他投资者对与该地区政府的关系感到满意。第二个潜在的安全挑战是南高加索国家(阿塞拜疆、亚美尼亚和格鲁吉亚)还可能存在足以影响项目实施的财务限制。该项目的第三安全挑战是中俄利益冲突对难高加索地区影响也使得这一项目可能存在安全挑战。这种可能性是基于俄罗斯在南高加索地区长期存在的利益,因为该地区也是苏联的一部分。目前,中俄关系水平相当高,鼓励双方降低可能发生利益冲突的风险。但是,如果关系恶化,丝绸之路经济带项目则可能面临安全挑战。本研究还专门以阿塞拜疆为例,探讨了两国之间关于丝绸之路经济带项目实施的一些现状及问题。研究者展示了当前两国经济和政治合作的各种实例并给予分析。作为进入欧洲市场的门户,阿塞拜疆现有的交通基础设施和投资环境鼓励中国企业更积极地参与阿塞拜疆的经济活动。总的来说,虽然存在安全挑战,但形势目前还是可控的,依然可以采取一些措施来确保项目的安全。在研究过程中,本人在阿塞拜疆和格鲁吉亚这两个过境国进行了两次访谈。一次是采访阿塞拜疆政府的一名高级官员,另一次则是与华为驻阿塞拜疆和格鲁吉亚的高层管理人员进行交流。由于没有任何外交关系,访问亚美尼亚的机会是有限的,这使得研究人员无法在亚美尼亚收集实地数据。

关键词：丝绸之路经济带南高加索政治中国-阿塞拜疆关系中国投资

Can we improve renal function by partial nephrectomy?

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Asian Journal of Urology 2021年第4期8卷 448-449页

作者： samir Bouras samir Yebdri Kamal Adjali Department of Urology Faculty of MedicineFerhat Abbas University Setif 1SetifAlgeria Department of Urology Faculty of MedicineMouloud Mammeri UniversityTizi OuZouAlgeria Department of Urology Faculty of MedicineBenyoyucef Benkhedda University Algiers 1AlgiersAlgeria

To the editor:I had the pleasure of reading a very interesting,original article published recently by Zhang et al.[1]in your prestigious journal,entitled“Comparison of the oncological,perioperative and functional outcomes of partial nephrectomy versus radical nephrectomy for clinical T1b renal cell carcinoma:A systematic review and meta-analysis of retrospective studies”.The interest in partial nephrectomy(PN)remains relevant after all these years of standardizing PN for cT1 renal masses[2,3].As all similar publications,this technique cannot be talked about without praising it for the preservation of long-term renal function(RF)compared to radical nephrectomy,especially for patients with a chronic kidney disease(CKD)[1e3].This article contains no less than two references whose titles refer directly to the *** interest in this aspect comes from our thesis work on PN,where we noticed an improvement in postoperative RF and its maintenance over time,in some patients,even with CKD,whether in our study or elsewhere.

关键词： function journal editor

Spatial and compositional variation in the fungal communities of organic and conventionally grown apple fruit at the consumer point-of-purchase

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Horticulture Research 2016年第1期3卷 76-87页

作者： Ahmed Abdelfattah Michael Wisniewski samir Droby Leonardo Schena Dipartimento di Agraria UniversitàMediterranea di Reggio CalabriaLocalitàFeo di Vito89124 ReggioCalabriaItaly U.S.Department of Agriculture-Agricultural Research Service(USDA-ARS) 2217 Wiltshire RoadKearneysvilleWV 25430USA Department of Postharvest and Food Sciences AROThe Volcani Center68 HaMccabim RoadRishon LeZion 7505101Israel

The fungal diversity in harvested apples from organic or conventional management practices was analyzed in different fruit locations(stem end,calyx end,peel,and wounded flesh)shortly after fruit purchase(T1)and after 2 weeks of storage(T5).A total of 5,760,162 high-quality fungal sequences were recovered and assigned to 8,504 Operational Taxonomic *** of the phylum Ascomycota were dominant in all samples and accounted for 91.6%of the total number of detected *** was followed by Basidiomycota(8%),Chytridiomycota(0.1%),and unidentified fungi(0.3%).Alpha and beta diversity analyses revealed the presence of significantly different fungal populations in the investigated fruit *** detected fungi,the genus Penicillium prevailed in the peel and in the wounded flesh while Alternaria *** in the calyx and stem end samples that included apple core *** taxonomic units that appear to be closely related to pathogenic fungi associated with secondary human infections were present in peel and ***,significantly different populations were revealed in organic and conventional apples and this result was consistent in all investigated fruit parts(calyx end,peel,stem end,and wounded flesh).Several unique taxa were exclusively detected in organic apples suggesting that management practices may have been a contributing factor in determining the taxa *** contrast,little differences were revealed in the two assessment times(T1 and T5).Results of the present study represent an advancement of the current knowledge on the fungal microbiota in collected fruit tissues of apple.

关键词： wound fungal apple

ON HYPERSTABILITY OF THE BIADDITIVE FUNCTIONAL EQUATION

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Acta Mathematica Scientia 2017年第6期37卷 1727-1739页

作者： Iz-iddine EL-FASSI Janusz BRZDEK Abdellatif CHAHBI samir KABBAJ Department of Mathematics Faculty of SciencesIbn Tofail UniversityBP 133KenitraMorocco Department of Mathematics Pedagogical UniversityPodchorazych 230-084 KrakowPoland

We present results on approximate solutions to the biadditive equationf（x＋y,z-w）＋f（x-y,z＋w）=2f（x,z）-2f（y,w）on a restricted domain. The proof is based on a quite recent fixed point theorem in some function spaces. Our main results state that, under some weak natural assumptions, functions satisfying the equation approximately （in some sense） must be actually solutions to it. In this way we obtain inequalities characterizing biadditive mappings and inner product spaces. Our outcomes are connected with the well known issues of Ulam stability and hyperstability.

关键词： hyperstability Ulam stability biadditive functional equation fixed point the-orem characterization of inner product space