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Mental health research in the Arab region in response to the COVID-19 pandemic:a scoping review

General Psychiatry 2022年第2期35卷 85-91页

作者： Mohamed Hussein mahmoud osman Hassan Ibrahim Hamdy Ezzat Abdelhafez Sami Ouanes Eiman Al-Janahi Yuri Zoghbi Ovais Wadoo Mental Health Services Hamad Medical CorporationDohaAd DawhahQatar Department of Neurosurgery Hamad Medical CorporationDohaAd DawhahQatar College of Medicine Qatar UniversityDohaAd DawhahQatar Department of Psychiatry College of MedicineQatar UniversityDohaAd DawhahQatar

Background The ongoing pandemic has led to a global surge in coronavius disease 2019(COVID-19)-related mental health ***,most related publications come from Western countries or China,and their findings cannot alwrays be extrapolated to Arabl *** This study provides a quantitative and qualitative analysis of mental health research pertaining to Arab countries'response to the COVID-19 *** A scoping review of the World Health Organzation(WHO)C0VID-19 database for publications on mental health was conducted by authors afllated *** istutions,including artides from inception to 24 October *** indluded publications were evaluated for their national distribution,international cllaboration,publication type,and main research *** quality analysis of the incuded research studies was performed using the original and mdified versions of the Newcastle Ottawa *** In total,102 articles were included in this study,averaging 4.6 articles per Arab *** of the articles emerged from the Kingdom of Saudi Arabia,Jordan,and Egypt.A majority of publications demonstrated intermational *** of the publications were original research studies and cross sectional in *** predominant research theme was examining the pandemic s mental health effects on the general population and healthcare workers.0nly 28.0% of the studies were of high methodologial quality,where as 41.5% were moderate and 30.5% were low in *** Mental health research in response to the COVID-19 pandemic in the Arab region has quantitative and qualitative *** institutions need torespond to the pandemic prompty in order to address the delineated research gap and to generate higher-quality research output.

关键词： qualitative prompt publications

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Reversibility of minimal hepatic encephalopathy following liver transplantation in Egyptian cirrhotic patients

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World Journal of Hepatology 2016年第30期8卷 1279-1286页

作者： mahmoud a osman Moataz M Sayed Khaled A Mansour Shereen A Saleh Wesam A Ibrahim Sara M Abdelhakam Mohamed Bahaa Wael A Yousry Hosam S Elbaz Reginia N Mikhail Azza M Hassan Ehab H Elsayed Dalia A mahmoud Department of Internal Medicine Hepatology and Gastroenterology Faculty of Medicine Ain Shams University Department of Tropical Medicine Faculty of Medicine Ain Shams University Department of Hepatobiliary Surgery Faculty of Medicine Ain Shams University Department of Community Environmental and Occupational Medicine Faculty of Medicine Ain Shams University Department of Internal Medicine Hepatology and Gastroenterology National Research Center Department of Neuropsychiatry Faculty of Medicine Ain Shams University

AIMTo evaluate the reversibility of minimal hepatic encephalopathy (MHE) following liver transplantation (LT) in Egyptian cirrhotic patients. METHODSThis prospective study included twenty patients with biopsy-proven liver cirrhosis listed for LT and twenty age- and sex-matched healthy control subjects. All underwent neuro-psychiatric examination, laboratory investigations, radiological studies and psychometric tests including trail making test A (TMT A), TMT B, digit symbol test and serial dotting test. The psychometric hepatic encephalopathy score (PHES) was calculated for patients to diagnose MHE. Psychometric tests were repeated six months following LT in the cirrhotic patient group. RESULTSBefore LT, psychometric tests showed highly significant deficits in cirrhotic patients in comparison to controls (P P P P = 0.005). More patients in whom reversal of MHE was observed had a pre-transplant MELD score CONCLUSIONReversal of MHE in cirrhotic patients could be achieved by LT, especially in those with a MELD score

关键词： Liver transplantation Model for end-stage liver disease score Psychometric tests Minimal hepatic encephalopathy Cirrhosis

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Evidence supporting the relationship between maternal asthma and risk for autism spectrum disorders

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Neural Regeneration Research 2025年第4期20卷 1101-1102页

作者： Hadley osman Paul Ashwood Department of Medical Microbiology and Immunology and the M.I.N.D.InstituteUniversity of California at DavisSacramentoCAUSA

During pregnancy,maternal immune activation(MIA),due to infection,chronic inflammatory disorders,or toxic exposures,can result in lasting health impacts on the developing *** has been associated with an increased risk of neurodevelopmental disorders,such as autism spectrum disorder(ASD)in the *** is characterized by increased repetitive and stereotyped behaviors and decreased *** of 2020,1 in 36 children are diagnosed with ASD by the age of 8 years,with ASD rates continuing to increase in prevalence in USA(Tamayo et al.,2023).Post-mortem brain studies,biomarker and transcriptomic studies,and epidemiology studies have provided compelling evidence of immune dysregulation in the circulation and brain of individuals diagnosed with ***,the etiology of ASD is largely unknown,however,genetic components and environmental factors can contribute to increased *** allergic asthma(MAA),a form of MIA,has been identified as a potential risk factor for developing neurodevelopmental disorders(Patel et al.,2020).Asthma is a chronic inflammatory condition driven by a T-helper type(TH)2 immune response.

关键词： disorders epidemiology fetus

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Multi-Stage-Based Siamese Neural Network for Seal Image Recognition

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 405-423页

作者： Jianfeng Lu Xiangye Huang Caijin Li Renlin Xin Shanqing Zhang mahmoud Emam School of Computer Science and Technology Hangzhou Dianzi UniversityHangzhou310018China Shangyu Institute of Science and Engineering Hangzhou Dianzi UniversityShaoxing312300China Faculty of Artificial Intelligence Menoufia UniversityShebin El-Koom32511Egypt

Seal authentication is an important task for verifying the authenticity of stamped seals used in various domains to protect legal documents from tampering and *** seal inspection is commonly audited manually to ensure document ***,manual assessment of seal images is tedious and laborintensive due to human errors,inconsistent placement,and completeness of the *** image recognition systems are inadequate enough to identify seal types accurately,necessitating a neural network-based method for seal image ***,neural network-based classification algorithms,such as Residual Networks(ResNet)andVisualGeometryGroup with 16 layers(VGG16)yield suboptimal recognition rates on stamp ***,the fixed training data categories make handling new categories to be a challenging *** paper proposes amulti-stage seal recognition algorithmbased on Siamese network to overcome these ***,the seal image is pre-processed by applying an image rotation correction module based on Histogram of Oriented Gradients(HOG).Secondly,the similarity between input seal image pairs is measured by utilizing a similarity comparison module based on the Siamese ***,we compare the results with the pre-stored standard seal template images in the database to obtain the seal *** evaluate the performance of the proposed method,we further create a new seal image dataset that contains two subsets with 210,000 valid labeled pairs in *** proposed work has a practical significance in industries where automatic seal authentication is essential as in legal,financial,and governmental sectors,where automatic seal recognition can enhance document security and streamline validation ***,the experimental results show that the proposed multi-stage method for seal image recognition outperforms state-of-the-art methods on the two established datasets.

关键词： Seal recognition seal authentication document tampering siamese network spatial transformer network similarity comparison network

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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

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Investigation of soliton solutions with different wave structures to the(2+1)-dimensional Heisenberg ferromagnetic spin chain equation

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Communications in Theoretical Physics 2020年第3期72卷 7-13页

作者： M S osman K U Tariq Ahmet Bekir A Elmoasry Nasser S Elazab M Younis mahmoud Abdel-Aty Department of Mathematics Faculty of ScienceCairo UniversityGizaEgypt Department of Mathematics Faculty of Applied ScienceUmm Alqura UniversityMakkah 21955Saudi Arabia School of Mathematics and Statistics Huazhong University of Science and TechnologyWuhan 430074China Department of Mathematics Mirpur University of Science and TechnologyMirpur(AJK)10250Pakistan Neighbourhood of Akcaglan Imarli StreetNumber:28/426030EskisehirTurkey Mathematics department College of ScienceMajmaah UniversitySaudi Arabia Punjab University College of Information Technology University of the PunjabLahore 54590Pakistan Department of Mathematics Faculty of ScienceSohag UniversitySohagEgypt Applied Science University Bahrain

The principal objective of this article is to construct new and further exact soliton solutions of the(2+1)-dimensional Heisenberg ferromagnetic spin chain equation which investigates the nonlinear dynamics of magnets and explains their ordering in ferromagnetic *** solutions are exerted via the new extended FAN sub-equation *** successfully obtain dark,bright,combined bright-dark,combined dark-singular,periodic,periodic singular,and elliptic wave solutions to this equation which are interesting classes of nonlinear excitation presenting spin dynamics in classical and semi-classical continuum Heisenberg systems.3D figures are illustrated under an appropriate selection of *** applied technique is suitable to be used in gaining the exact solutions of most nonlinear partial/fractional differential equations which appear in complex phenomena.

关键词： soliton solutions Heisenberg ferromagnetic equation FAN sub-equation method

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Hepatoprotective Effect of Camel Thorn Polyphenols in Concanavalin A-Induced Hepatitis in Mice

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Chinese Journal of Integrative Medicine 2024年第12期30卷 1090-1100页

作者： Nageh Ahmed El-Mahdy Thanaa Ahmed El-Masry Ahmed mahmoud El-Tarahony .Fatemah AAlherz Enass Youssef osman Department of Pharmacology and Toxicology Faculty of PharmacyTanta UniversityTanta 31527Egypt Department of Pharmaceutical Sciences College of PharmacyPrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh 11671Saudi Arabia

Objective:To explore the prophylactic and therapeutic effects of Alhagi maurorum ethanolic extract(AME)in concanavalin A(Con A)-induced hepatitis(CIH)as well as possible underlying ***:Polyphenols in AME were characterized using high performance liquid chromatography(HPLC).Swiss albino mice were divided into 4 *** group received intravenous phosphate-buffered saline(PBS);Con A group received 40 mg/kg intravenous Con *** group administered 300 mg/(kg·d)AME orally for 5 days before Con A *** group received intravenous Con A then administered300 mg/kg AME at 30 min and 3 h after Con A *** 24 h of Con A injection,hepatic injury,oxidative stress,and inflammatory mediators were *** examination and markers of apoptosis,inflammation,and CD4^(+)cell infiltration were also ***:HPLC analysis revealed that AME contains abundant polyphenols with pharmacological constituents,such as ellagic acid,gallic acid,ferulic acid,methylgallate,and *** alleviated Con A-induced hepatic injury,as manifested by a significant reduction in alanine aminotransferase,aspartate aminotransferase and alkaline phosphatase(P<0.01).Additionally,the antioxidant effect of AME was revealed by a significant reduction in oxidative stress markers(nitric oxide and malondialdehyde)and restored glutathione(P<0.01).The levels of proinflammatory cytokines(tumor necrosis factor-α,interferon-γ,and interleukin-6)and c-Jun N-terminal kinase(JNK)activity were reduced(P<0.01).Histopathological examination of liver tissue showed that AME significantly ameliorated necrotic and inflammatory lesions induced by Con A(P<0.01).Moreover,AME reduced the expression of nuclear factor kappa B,pro-apoptotic protein(Bax),caspase-3,and CD4^(+)T cell hepatic infiltration(P<0.01).The expression of anti-apoptotic protein Bcl-2 was increased(P<0.01).Conclusions:AME has hepatoprotective and ameliorative effects in CIH mice

关键词： concanavalin A-induced hepatitis Alhagi maurorum ethanolic extract hepatoprotective effect

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Minimizing Buoyancy Factor of Metallic Pressure-Hull Subjected to Hydrostatic Pressure

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Intelligent Automation & Soft Computing 2023年第1期35卷 769-793页

作者： mahmoud Helal Elsayed Fathallah Abdulaziz H Alghtani Hussein Shawki osman Jong Wan Hu Hasan Eleashy Department of Mechanical Engineering Faculty of EngineeringTaif UniversityTaif 21944Saudi Arabia Production and Mechanical Design Department Faculty of EngineeringMansoura UniversityMansoura 35516Egypt Civil Engineering Department M.T.C.Kobry ElkobbaCairo 11865Egypt Ships and Submarines Engineering Department Military Technical CollegeCairo 11865Egypt Civil Engineering Department Sohag UniversitySohag 82524Egypt Department of Civil and Environmental Engineering Incheon National UniversityIncheon 22012Korea Incheon Disaster Prevention Research Center Incheon National UniversityIncheon 22012Korea Mechanical Engineering Department Faculty of Engineering&TechnologyFuture University in EgyptCairo 11835Egypt

To increase the payload,reduce energy consumption,improve work efficiency and therefore must accordingly reduce the total hull weight of the *** paper introduces a design optimization process for the pressurehull of submarines under uniform external hydrostatic pressure using bothfinite element analysis(FEA)and optimization tools.A comprehensive study about the optimum design of the pressure hull,to minimize the weight and increase the volume,to reach minimum buoyancy factor and maximum operating depth minimizing the buoyancy factor(B.F)is taken as an objective function with constraints of plate and frame yielding,general instability and *** optimization process contains many design variables such as pressure-hull plate thickness,unsupported spacing,dimensions of long and ring beams andfinally the elliptical submersible pressure-hull *** optimization process was conducted using ANSYS parametric design language(APDL)and *** Multi-Island Genetic Algorithm(G.A)is considered to conduct the optimization ***,parametric analysis is done on the pressure hull to examine the effect of different design variables on the pressure-hull *** a result,the B.F of the proposed optimal model is reduced by an average of 31.78%compared with Reference Model(RM).Maximum von Mises stress is reduced by 27%as *** results can be helpful for submarine pressure-hull designers.

关键词： Buoyancy factor pressure-hull material failure ANSYS ISIGHT general instability

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Indentation Load Effect on Young＇s Modulus and Hardness of Porous Sialon Ceramic by Depth Sensing Indentation Tests

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Chinese Physics Letters 2007年第11期24卷 3206-3209页

作者： osman SAHIN Department of Physics Art and Science Faculty Silleyman Demirel University Isparta Turkey

Depth sensing indentation （DSI） tests at the range of 200-1800mN are performed on porous sialon ceramic to determine the indentation load on Young＇s modulus and hardness values. The Young modulus and hardness （Dynamic and Martens） values are deduced by analysing the unloading segments of the DSI test load-displacement curves using the Oliver-Pharr method. It is found that Young＇s modulus ET, the dynamic hardness HD and the Martens hardness HM exhibit significant indentation load dependences. The values of Young＇s modulus and hardness decrease with the increasing indentation load, as a result of indentation load effect. The experimental hf /hm ratios lower than the critical value 0.7, with hm being the maximum penetration depth during loading and hf the final unloading depth, indicate that our sample shows the work hardening behaviour.

关键词： coated conductor buffer layer self-epitaxy CeO2

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The Tauride Ophiolites of Anatolia(Turkey):A Review

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Journal of Earth Science 2016年第6期27卷 901-934页

作者： osman Parlak Cukurova On Universitesi Jeoloji Muhendisligi Bolumu Balcah Adana 01380 Turkey

The Tauride ophiolites lie on the northern and southern flanks of an E-W-trending Tanride carbonate platform. They mainly consist of three tectonic units namely in ascending order, ophiolitic melange, sub-ophiolitic metamorphic sole and oceanic lithospheric remnants. They were generated above intra-oceanic subduction zones and emplaced over the Tauride carbonate platform from different Neotethyan oceanic basins in the Late Cretaceous. Tauride ophiolites from west to east are described and reviewed. All are underlain by well-preserved dynamothermal metamorphic soles of varied structural thicknesses up to 500 m that have a constant structural position between ophiolitic melange below and harzburgitic mantle tectonites above and display typical inverted metamorphic sequences from amphibolite facies above to greenschist facies below. The metamorphic soles are shown to have evolved during the initiation of subduction and emplacement processes. In the PozantlKarsantl area the contact between the metamorphic sole and the overlying serpentinized harzburgites is characterized by a 1.5-2-m-thick zone of sheared serpentinized harzburgitic mantle intercalated with amphibolites and cut by thick mafic dykes （7-8 m） which postdate intraoceanic metamorphism and high-temperature ductile deformation. This contact is interpreted as an intra-oceanic decoupling surface along which volcanics from the upper levels of the down-going plate were metamorphosed to amphibolite facies and accreted to the base of the hanging wall plate. The metamorphic soles and overlying ophiolitic rocks were intruded by numerous isolated post-metamorphic diabase dykes filled by island arc tholeiitic magma. Subduction initiation and roll-back processes best explain the structural and petrological relationships of Late Cretaceous ophiolite genesis, metamorphic sole formation and subsequent dyke emplacement of the Tauride ophiolites.

关键词： ophiolite metamorphic sole dyke emplacement roll-back subduction initiation.

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