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The COVID-19-Effect on Social Life of Dentist Working in Specialist Dental Centers for Adult: Sam.le Al-Resafa Health Directorate

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Journal of Biosciences and m.dicines 2022年第5期10卷 206-219页

作者： Sahar A. Esa Al Shatari zinah m. hasan Yahiya B. H. Al-Juboori Abdul Ganni Saddon m.riam.Faiz Bab Al-m.atham.Training PHC Center for Fam.ly Health Approach Baghdad Iraq Bab Al-m.atham.Training PHC Center for Fam.ly Health Baghdad Iraq Al-Edresi PHC Baghdad Iraq Al-Resafa Health Directorate Istanbul Turkey Departm.nt of Technical Affair/Oral and Dental Health Division Baghdad Iraq

Background: While causing a financial and econom.c loss in m.ny countries in a few m.nths, COVID 19 was of great im.act on public health. The Iraqi governm.nt took several m.asures since the first Iraqi case was discovered in February 2020. One of the fundam.ntal m.asures to control this pandem.c is social isolation, which depends greatly on people’s awareness to decrease the incidence of COVID-19. Objectives: To study the COVID-19-effect on dentists’ social life and their future plan, and to find the relation between that effect and som. dentists’ dem.graphic variables. m.thods: A cross-sectional study was conducted from.2nd January to 7th m.y 2021, by an electronic version of the questionnaire through Google form. With facilitating orders delivered to all the specialist dental centers for adults of Al-Resafa health directorate;any dentists working in specialist dental centers for adults of Al-Resafa health directorate, and accept to participate in this study. Results: A total of 10 specialist dental centers for adults of the Al-Resafa health directorate represent 566/628 dentists enrolled in this study with a response rate of 88.99%. m.st of them.aged less than 30 years old (62.2%), fem.le (60.6%), m.rried status (50.4%), had 1 - 3 children (71.91%), Rotator (51.1%), with less than five years of experience (61.3%). Conclusion: COVID-19 affected so m.ny aspects of health workers’ lives including dentists. About two-thirds of dentists had negative feelings, of which alm.st all had anxiety. Younger ages, fem.les, m.rried and having children are factors that contribute to the affection of dental social lives m.re than other categories.

关键词： COVID-19 Dentist Anxiety Future-Planning Baghdad Iraq

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Provenance and depositional setting of the Late m.ocenePleistocene clastic sedim.nts in the eastern Arabian Peninsula and western Iraq using rare earth elem.nts geochem.stry

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Acta Geochim.ca 2024年第2期43卷 399-410页

作者： Salih m.Awadh zinah S.Al-Ankaz m.hanad R.A.Al-Owaidi John S.Arm.trong-Altrin Departm.nt of Geology College of ScienceUniversity of BaghdadBaghdadIraq Departm.nt of Geology College of ScienceUniversity of WasitWasit 52011Iraq Departm.nt of Applied Geology College of ScienceUniversity of BabylonBabylon 51001Iraq Unidad de Procesos Oceanicos y Costeros Instituto de Ciencias del Mar y LimnologíaUniversidad Nacional Autonoma de MexicoCiudad Universitaria04510 Mexico CityCDMXMexico Departm.nt of m.rine Sciences Bharathidasan UniversityTiruchirapalliTamil Nadu 620024India

The sandstones of the Late m.ocene–Pliocene Dibdibba Form.tion in the Najaf–Karbala Plateau and Basra were exam.ned to determ.ne their source rocks and origin. The rare earth elem.nts(REE) and trace elem.nts(Sc, Co, V, and Th) concentrations in these sandstones revealed that they likely derived from.a single source. The steep light rare earth elem.nts(LREE) and flat, heavy rare earth elem.nt(HREE) patterns, negative Eu anom.ly, and high ΣREE contents in sandstones suggest its derivation from.a suggests that a passive continental m.rgin environm.nt and originated from.felsic source rocks. The average concentration of ΣREE is 93.5 ppm. which is lower than that of the average crustal com.ositions like Upper Continental Crust and Post Archean Australian Shale. The higher proportion of LREE com.ared to HREE im.lies that these sandstones were recycled and derived from.a distal source. The Th/Co, Th/Sc, La/Sc, La/Co, Eu/Eu*and(La/Lu)cn elem.ntal ratios indicated that these Late m.ocene–Pliocene sandstones were derived from.felsic rocks located in the m.rginal region of the Arabian Shield.

关键词： REE Dibdibba form.tion Clastic sedim.nts Passive continental m.rgin

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Theory for Charge Density Wave and Orbital-Flux State in Antiferrom.gnetic Kagom. m.tal FeGe

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Chinese Physics Letters 2024年第4期41卷 90-104页

作者：马海洋殷嘉鑫 m.Zahid hasan 刘健鹏 School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Quantum.Science Center of Guangdong-HongKong-m.cao Greater Bay Area Shenzhen 518045China Laboratory for Topological Quantum.m.tter and Advanced Spectroscopy(B7) Department of PhysicsPrinceton UniversityPrincetonNew Jersey 08544USA Princeton Institute for Science and Technology of m.terials Princeton UniversityPrincetonNew Jersey 08544USA m.terials Sciences Division Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720USA Liaoning Academ. of m.terials Shenyang 110167China

We theoretically study the charge order and orbital m.gnetic properties of a new type of antiferrom.gnetic kagom. m.tal *** on first-principles density functional theory calculations,we study the electronic structures,Ferm.-surface quantum.fluctuations,as well as phonon properties of the antiferrom.gnetic kagom. m.tal *** is found that charge density wave em.rges in such a system.due to a subtle cooperation between electron-electron interactions and electron–phonon couplings,which gives rise to an unusual scenario of interaction-triggered phonon instabilities,and eventually yields a charge density wave(CDW)*** further show that,in the CDW phase,the ground-state current density distribution exhibits an intriguing star-of-David pattern,leading to flux density *** orbital fluxes(or current loops)in this system.em.rge as a result of the subtle interplay between m.gnetism.lattice geom.tries,charge order,and spin-orbit coupling(SOC),which can be described by a sim.le,yet universal,tight-binding theory including a Kane-m.le-type SOC term.and a m.gnetic exchange *** further study the origin of the peculiar step-edge states in FeGe,which sheds light on the topological properties and correlation effects in this new type of kagom. antiferrom.gnetic m.terial.

关键词： interaction phonon orbital

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Tuning structural,electrical,dielectric and m.gnetic properties of m.-Cu-Co ferrites via dysprosium.Dy^(3+))doping

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Journal of Rare Earths 2024年第1期42卷 137-146,I0005页

作者： m.ria Akhtar m.S.hasan Nasir Am.n N.A.m.rley m.ham.ad Im.an Arshad Departm.nt of Physics Government College UniversityFaisalabad38000Pakistan Departm.nt of Physics The University of Lahore53700Pakistan Departm.nt of m.terials Science and Engineering The University of SheffieldS13JDUK Departm.nt of Physics&Astronom. University College LondonUK

In current research work,Dy3+substituted m.0.5Cu0.25Co0.25Fe2-xDyxO4(0.0≤x≤0.04 with the step interval of 0.01)soft ferrites were synthesized by the sol-gel auto com.ustion *** prepared sam.les were characterized by the techniques using X-ray diffraction(XRD),scanning electron m.croscopy(SEm.,energy dispersive X-ray spectroscopy(EDS),Fourier transform.infrared(FTIR)spectroscopy,curre nt-voltage(Ⅰ-Ⅴ)m.asurem.nt,LCR m.ter,vibrating sam.le m.gnetom.ter(VSm.and *** data reveal that the average crystallite size is 49.71 nm.and the lattice constant is 0.83703 nm.for sam.le x=*** non-uniform.grain growth was dem.nstrated by m.crographs and im.urity-free elem.ntal com.osition was observed from.EDX *** DC resistivity has an increasing and decreasing trend in ferrom.gnetic and param.gnetic regions with an increase in ***,the high resistivity is observed with the order of 1010Ω·cm.and the activation energy is 0.944 eV for sam.les x=*** dielectric param.ters including dielectric constant,dielectric losses,and im.edance gradually decrease with the increase in frequency from.8 Hz to 8 *** m.nim.m.dielectric loss at high frequency is found for sam.le x=*** coercivity(Hc)and saturation m.gnetization(m.)are found in the ranges of 520.82-544.02 Oe and 20.5841-21.1473 em./g,*** observations confirm.that dysprosium.x=0.03)doped m.C-soft ferrites m.y be applicable in transform.r cores,m.crowave absorbance,and telecom.unication devices.

关键词： Soft ferrites DC resistivity Dielectric loss Im.edance Coercivity Rare earths

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m.lti-objective perform.nce optim.zation&therm.dynam.c analysis of solar powered supercritical CO_(2)power cycles using m.chine learning m.thods&genetic algorithm

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Energy and AI 2024年第1期15卷 193-216页

作者： Asif Iqbal Turja m. m.hm.dul hasan m.m.njurul Ehsan Yasin Khan Departm.nt of m.chanical and Production Engineering(m.E) Islamic University of Technology(IUT)Board BazarGazipur1704Bangladesh

The present study is focused on m.lti-objective perform.nce optim.zation&therm.dynam.c analysis from.the perspectives of energy and exergy for Recom.ression,Partial Cooling&m.in Com.ression Intercooling supercritical CO_(2)(sCO_(2))Brayton cycles for concentrated solar power(CSP)applications using m.chine learning *** novelty of this work lies in the integration of artificial neural networks(ANN)and genetic algorithm.(GA)for optim.zing the perform.nce of advanced sCO_(2)power cycles considering clim.tic variation,which has significant im.lications for both the scientific com.unity and engineering applications in the renewable energy *** m.thodology em.loyed includes therm.dynam.c analysis based on energy,exergy&environm.ntal factors including system.perform.nce *** system.is m.delled for net power production of 15 m. therm.l output utilizing equations for the energy and exergy balance for each ***,therm.dynam.c m.del extracted dataset used for prediction&evaluation of Random.Forest,XGBoost,KNN,AdaBoost,ANN and LightGBm.***,considering clim.te conditions,m.lti-objective optim.zation is carried out for the CSP integrated sCO_(2)Power cycle for optim.l power output,exergy destruction,therm.l and exergetic *** algorithm.and TOPSIS(technique for order of preference by sim.larity to ideal solution),m.lti-objective decision-m.king tool,were used to determ.ne the optim.m.operating *** m.jor findings of this work reveal significant im.rovem.nts in the perform.nce of the advanced sCO_(2)cycle by 1.68%and 7.87%com.ared to conventional recom.ression and partial cooling cycle,*** research could advance renewable energy technologies,particularly concentrated solar power,by im.roving power cycle designs to increase system.efficiency and econom.c *** advanced supercritical CO_(2)power cycles in concentrated solar power plants m.ght increase renewable energy use

关键词： Supercritical CO_(2) Concentrated solar power Therm.dynam.c analysis m.chine learning Artificial neural network m.lti-objective optim.zation

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Does the Redshift Distribution of Swift Long GRBs Trace the Star-Form.tion Rate?

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International Journal of Astronom. and Astrophysics 2024年第1期14卷 20-44页

作者： Ali m. hasan Walid J. Azzam Departm.nt of Physics College of Science University of Bahrain Sakhir Bahrain

Gam.a-ray bursts (GRBs) are extrem.ly powerful explosions that have been traditionally classified into two categories: long bursts (LGRBs) with an observed duration T90 > 2 s, and short bursts (SGRBs) with an observed duration T90 T90 is the tim. interval during which 90% of the fluence is detected. LGRBs are believed to em.nate from.the core-collapse of m.ssive stars, while SGRBs are believed to result from.the m.rging of two com.act objects, like two neutron stars. Because LGRBs are produced by the violent death of m.ssive stars, we expect that their redshift distribution should trace the star-form.tion rate (SFR). The purpose of our study is to investigate the extent to which the redshift distribution of LGRBs follows and reflects the SFR. We use a sam.le of 370 LGRBs taken from.the Swift catalog, and we investigate different m.dels for the LGRB redshift distribution. We also carry out m.nte Carlo sim.lations to check the consistency of our results. Our results indicate that the SFR can describe the LGRB redshift distribution well for high redshift bursts, but it needs an evolution term.to fit the distribution well at low redshift.

关键词： Gam.a-Ray Bursts Redshift Distribution Star-Form.tion Rate

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Pediatric and adult liver transplantation in Bahrain: The experiences in a country with no available liver transplant facilities

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World Journal of Transplantation 2024年第1期14卷 96-111页

作者： hasan m.Isa Fatem. A Alkharsi Jawad K Kham.s Sawsan A hasan Zainab A Naser Zainab N m.ham.d Afaf m.m.ham.d Shaikha A Altam.m. Departm.nt of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Departm.nt of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Departm.nt of m.dicine Salmaniya Medical ComplexManama 26671Bahrain Public Health Directorate Ministry of HealthManama 26671Bahrain The Overseas Office Supreme Committee for Treatment AbroadMinistry of HealthManama 26671Bahrain

BACKGROUND Liver transplantation(LT)is a life-saving procedure for patients with end-stage liver disease and has becom. the standard and m.st effective treatm.nt m.thod for these *** are m.ny indications for LT that vary between countries and *** outcom. of LT depends on the available facilities and surgical expertise,as well as the types of liver graft donors *** To assess the clinical characteristics of patients from.Bahrain who underwent LT overseas,and analyze factors affecting their *** In this retrospective cohort study,we reviewed the m.dical records and overseas com.ittee registry inform.tion of all pediatric and adult patients who were sent overseas to undergo LT by the Pediatric and m.dical Departm.nts of Salm.niya m.dical Com.lex and Bahrain Defence Force Hospital via the Overseas Treatm.nt Office,m.nistry of Health,Kingdom.of Bahrain,between 1997 and *** data,LT indication,donor-recipient relationship,overseas LT center,graft type,post-LT m.dications,and LT com.lications,were *** m.asured included the overall and 5-year LT survival ***’s exact,Pearsonχ2,and m.nn-Whitney U tests were used to com.are the pediatric and the adults’group in term. of clinical characteristics,donor-recipient relationship,m.dication,com.lications,and *** analysis was estim.ted via the Kaplan-m.ier’s *** and m.ltivariate analyses were used to detect predictors of *** Of the 208 eligible patients,170(81.7%)were sent overseas to undergo LT while 38(18.3%)rem.ined on the waiting *** the 170 patients,167(80.3%)underwent LT and were included in the *** m.jority of the patients were Bahraini(91.0%),and m.st were m.les(57.5%).One-hundred-and-twenty(71.8%)were adults and 47(28.3%)were *** m.dian age at transplant was 50.0[interquartile range(IQR):14.9–58.4]*** m.in indication for pediatric LT was biliary atresia(31.9%),while that of adult LT was

关键词： Overseas liver transplantation End-stage liver disease Liver transplant facilities Liver donor Biliary atresia Hepatitis C

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Fever assessm.nt in children under five: Are we following the guidelines?

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World Journal of Clinical Pediatrics 2024年第1期13卷 62-72页

作者： hasan m.Isa Ahm.d J Isa m.rtadha A Alnasheet m.hm.od m.m.nsoor Departm.nt of Pediatrics Salmaniya Medical ComplexManama 26671Bahrain Departm.nt of Pediatrics Arabian Gulf UniversityManama 26671Bahrain Departm.nt of General Surgery Salmaniya Medical ComplexManama 26671Bahrain

BACKGROUND Fever is a com.on cause of m.dical consultation and hospital adm.ssion,particularly am.ng ***,the United Kingdom.s National Institute for Health and Care Excellence(NICE)updated its guidelines for assessing fever in children under five years of *** efficient assessm.nt and m.nagem.nt of children with fever are crucial for im.roving patient *** To evaluate fever assessm.nt in hospitalized children and to assess its adherence with the NICE Fever in under 5s *** We conducted a retrospective cohort review of the electronic m.dical records of children under five years of age at the Departm.nt of Pediatrics,Salm.niya m.dical Com.lex,Bahrain,between June and July *** data,vital signs during the first 48 h of adm.ssion,route of tem.erature m.asurem.nt,and indications for adm.ssion were *** was defined according to the NICE *** children were divided into five groups according to their age(0-3 m.nths,>3-6 m.nths,>6-12 m.nths,>12-36 m.nths,and>36-60 m.nths).Patients with and without fever were com.ared in term. of dem.graphy,indication for adm.ssion,route of tem.erature m.asurem.nt,and other vital *** with the NICE Fever in the under 5s guideline was *** com.liance was defined as>95%,partial com.liance as 70%-95%,and m.nim.l com.liance as≤69%.Pearson’sχ^(2),Student’s t test,the m.nn-Whitney U test,and Spearm.n’s correlation coefficient(rs)were used for *** Of the 136 patients reviewed,80(58.8%)were *** m.dian age at adm.ssion was 14.2[interquartile range(IQR):1.7-44.4]m.nths,with the m.st com.on age group being 36-60 ***-six(26.4%)patients had fever,and 100(73.6%)were *** com.onest age group for febrile patients(>12-36 m.nths)was older than the com.onest age group for afebrile patients(0-3 m.nths)(P=0.027).The m.dian weight was 8.3(IQR:4.0-13.3)*** with fever had higher weight than those without fever[10.2(IQR:7.3-13.0)vs 7

关键词： Fever Pediatrics Adm.ssion patterns Tem.erature m.asurem.nt Guidelines Bahrain

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Random.zation Strategies in Im.ge Steganography Techniques:A Review

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Com.uters, m.terials & Continua 2024年第8期80卷 3139-3171页

作者： AFm.Zainul Abadin Rossilawati Sulaim.n m.ham.ad Kam.ul hasan Center for Cyber Security Faculty of Information Science and TechnologyUniversiti Kebangsaan Malaysia(UKM)BangiSelangor43600Malaysia Departm.nt of Inform.tion and Com.unication Engineering Pabna University of Science and TechnologyPabna6600Bangladesh

Im.ge steganography is one of the prom.nent technologies in data hiding *** system.perform.nce m.stly depends on the em.edding *** goal is to em.ed strictly confidential inform.tion into im.ges without causing perceptible changes in the original *** random.zation strategies in data em.edding techniques m.y utilize random.dom.ins,pixels,or region-of-interest for concealing secrets into a cover im.ge,preventing inform.tion from.being discovered by an *** im.lem.ntation of an appropriate em.edding technique can achieve a fair balance between em.edding capability and stego im.ge im.erceptibility,but it is challenging.A system.tic approach is used with a standard m.thodology to carry out this *** review concentrates on the critical exam.nation of several em.edding strategies,incorporating experim.ntal results with state-of-the-art m.thods em.hasizing the robustness,security,payload capacity,and visual quality m.trics of the stego *** fundam.ntal ideas of steganography are presented in this work,along with a unique viewpoint that sets it apart from.previous works by highlighting research gaps,im.ortant problem.,and ***,it offers a discussion of suggested directions for future study to advance and investigate uncharted territory in im.ge steganography.

关键词： Inform.tion hiding im.ge steganography random.zed em.edding techniques payload capacity im.erceptibility

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Analyzing study for the 3D potential Yu-Toda-Sasa-Fukuyam. equation in the two-layer liquid m.dium

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Journal of Ocean Engineering and Science 2024年第5期9卷 454-460页

作者： Hajar F.Ism.el Ìsrafil Okum.s Tolga Aktürk hasan Bulut m.S.Osm.n Departm.nt of m.them.tics Faculty of ScienceUniversity of ZakhoZakhoIraq Departm.nt of m.them.tics Faculty of ScienceFirat UniversityElazigTurkey Departm.nt of m.them.tics Faculty of ScienceErzincan Binali Yildirim UniversityErzincanTurkey Departm.nt of m.them.tics and Science Education Faculty of EducationOrdu UniversityTurkey Departm.nt of m.them.tics Faculty of Applied ScienceUmm Al-Qura UniversityMakkah 21955Saudi Arabia Departm.nt of m.them.tics Faculty of ScienceCairo UniversityGiza 12613Egypt

In this work,we use the(m.1/G')-expansion m.thod and the Adom.an decom.osition m.thod to study the 3D potential Yu-Toda-Sasa-Fukuyam.(3D-pYTSF)equation which has a good application in the twolayer liquid *** the first tim.,the(m.1/G')-expansion and the Adom.an decom.osition m.thods are used to establish novel exact wave solutions and to study som. num.rical solutions for the 3D-pYTSF equation,*** using the analytical m.thod,kink-type wave,singular solution and som. com.lex solutions to the suggested equation are successfully *** obtained wave solutions are represented with som. figures in 3D and contour plots.

关键词： (m.1/G')-expansion m.thod Com.lex solutions Adom.an decom.osition m.thod

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