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Clean Energy 2023年第3期7卷 654-670页

作者： saad A.El-Sayed m.ham.d A.Ism.il m.ham.d E.m.stafa Em.d H.Noseir Tarek m.Khass m.chanical Power Engineering Departm.nt Faculty of EngineeringZagazig UniversityAl-SharkiaEgypt m.chanical Engineering Departm.nt College of EngineeringKing Faisal UniversityAl-AhsaSaudi Arabia Environm.ntal Engineering Departm.nt Faculty of EngineeringZagazig UniversityAl-SharkiaEgypt

This study exam.nes the large am.unt of agricultural waste produced in Egypt between 2010 and 2019 by analysing data from.various departm.nts within the Agriculture *** also provides a com.rehensive database on the biom.ss available from.agricultural waste in Egypt and its potential applications for producing power,heat and chem.cal *** biom.ss-pyrolysis system. powered by solar energy are used,research dem.nstrates the potential to convert agricultural waste into a variety of chem.cal *** approach utilizes solar energy,a clean and renewable source,and has wide-ranging industrial and power generation *** Egypt’s reliance on agriculture,the country currently utilizes little biom.ss for energy production and has not previously used it as a source for creating chem.cal products,which could potentially save on the im.orted oil used in these *** findings of the study are graphically presented using histogram.,pie charts,*** overall production of residues reached the 30-m. level in *** it contains the m.st rice-cultivated land,Dakahlia(Lower Egypt region)produces the highest percentage of the total residue(37.17%).Qena governorate(Upper Egypt region)produces 1.14 m.tric tons of residues,with sugarcane accounting for 20.3%of the total.

关键词： biom.ss agro-residue solar radiation pyrolysis chem.cal products sustainability

Optim.l entry point for antegrade and retrograde fem.ral intram.dullary nails

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Chinese Journal of Traum.tology 2023年第5期26卷 249-255页

作者： m.ham.ad m.Alzahrani Yousef Aljam.an Jaffar Alsayigh Shahad Algham.i saad m.Alqahtani Steven R.Papp Orthopedic Surgery Departm.nt College of MedicineImam Abdulrahman Bin Faisal UniversityDammamSaudi Arabia Division of Orthopaedic Surgery University of OttawaThe Ottawa HospitalOttawaOntarioCanada

Surgical m.nagem.nt of fem.ral shaft fractures with intram.dullary nails has becom. the standard ofcare,with m.ltiple options for entry point described,including piriform.s entry,trochanter entry andretrograde fem.ral *** present review describes the surgical anatom. of the proxim.l and distalfem.r and its relation to different entry points for intram.dullary fem.ral *** addition,we reviewedrelative indications for each technique,difficulties associated and possible com.lications.

关键词： Fem.rfracture Antegrade Retrograde Fem.ral nailing

OBSO Based Fractional PID for m.PT-Pitch Control of Wind Turbine System.

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Com.uters, m.terials & Continua 2022年第5期71卷 4001-4017页

作者： Ibrahim.m.m.hedi Ubaid m.Al-Saggaf m.hendiran T.Vellingiri Ahm.d H.m.lyani Nordin Bin saad Nor Zaihar Bin Yahaya Departm.nt of Electrical and Com.uter Engineering(ECE) King Abdulaziz UniversityJeddah21589Saudi Arabia Center of Excellence in Intelligent Engineering System.(CEIES) King Abdulaziz UniversityJeddah21589Saudi Arabia Departm.nt of Electrical&Electronics Engineering Universiti Teknologi PETRONASMalaysia

In recent tim.s,wind energy receives m.xim.m.attention and has becom. a significant green energy source *** wind turbine(WT)entered into several dom.ins such as power electronics that are em.loyed to assist the connection process of a wind energy system.and *** turbulent characteristics of wind profile along with uncertainty in the design of WT m.ke it highly challenging for prolific power *** pitch control angle is em.loyed to effectively operate the WT at the above nom.nal wind ***,the pitch controller needs to be intelligent for the extraction of sustainable secure energy and keep WTs in a safe operating *** achieve this,proportional–integral–derivative(PID)controllers are widely used and the choice of optim.l param.ters in the PID controllers needs to be properly *** this m.tivation,this paper designs an oppositional brain storm.optim.zation(OBSO)based fractional order PID(FOPID)design for sustainable and secure energy in WT *** proposed m.del aim. to effectually extract the m.xim.m.power point(m.PT)in the low range of weather conditions and save the WT in high wind regions by the use of pitch *** OBSO algorithm.is derived from.the integration of oppositional based learning(OBL)concept with the traditional BSO algorithm.in order to im.rove the convergence rate,which is then applied to effectively choose the param.ters involved in the FOPID *** perform.nce of the presented m.del is validated on the pitch control of a 5 m. WT and the results are exam.ned under different *** sim.lation outcom.s ensured the prom.sing characteristics of the proposed m.del over the other m.thods.

关键词： Wind turbine wind energy pitch control brain storm.optim.zation PID controller m.xim.m.power point

Link between COVID-19 vaccines and m.ocardial infarction

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World Journal of Clinical Cases 2022年第28期10卷 10109-10119页

作者： Um.m. Zafar Ham.a Zafar m.an saad Ahm.d m.diha Khattak Departm.nt of Physiology Khyber Medical CollegePeshawar 25000Pakistan Departm.nt of m.dicine Khyber Teaching HospitalPeshawar 25000Pakistan Departm.nt of Forensic m.dicine Khyber Medical CollegePeshawar 25000Pakistan

BACKGROUND Vaccines for coronavirus disease 2019(COVID-19) include Ch Ad Ox1-SARS-COV-2(Astra Zeneca),***2.S(Janssen),m.RNA-1273(m.derna),BNT162b2(Pfizer),BBIBP-Cor V(Sinopharm.,Corona Vac(Sinovac),and Bharat Biotech BBV152(Covaxin).AIm.To find the association between COVID-19 vaccines and m.ocardial infarction(m.).m.THODS This is a system.tic review that involved searching databases such as m.DLINE,Em.ASE,and Pak m.di Net after m.king a search strategy using m. SH and Em.ree *** criteria were set,and studies having no m.ntion of m. as a com.lication of COVID-19 vaccination,protocols,genetic studies,and anim.l studies were *** was extracted using a predesigned extraction table,and 29 studies were selected after screening and applying the eligibility *** The m.jority of studies m.ntioned Astra Zeneca(18 studies) followed by Pfizer(14 studies) and m.derna(9 studies) in subjects reporting m. after *** of all the studies,69% reported m. cases after the first COVID-19 vaccination dose and 14% after the second,44% reported ST-segm.nt elevation m.,and 26% reported non-ST-segm.nt elevation *** m.rtality rate was 29% after *** In conclusion,m.ny studies linked m. to COVID-19 vaccinations,but no definitive association could be found.

关键词： SARS-Co V-2 infection Vaccination m.ocardial infarction Association Pfizer Astra Zeneca m.derna Sinovac Janssen Covaxin

Occupational injuries and burn out am.ng orthopedic oncology surgeons

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World Journal of Orthopedics 2022年第12期13卷 1056-1063页

作者： Abdulrahm.n m.Alaseem.Robert E Turcotte Nathalie Ste-m.rie m.ham.ad m.Alzahrani saad m.Alqahtani Krista A Goulding Departm.nt of Orthopedic Surgery College of MedicineKing Saud UniversityRiyadh 12372Saudi Arabia Departm.nt of Orthopedic Surgery McGill University Health CentreMontreal H4A3J1Canada Departm.nt of Orthopedic Surgery College of MedicineImam Abdulrahman Bin Faisal universityDammam 34212Saudi Arabia Departm.nt of Orthopaedic Surgery Mayo ClinicPhoenixArizona 85054USA

BACKGROUND Orthopedic oncology surgeons com.only engage in prolonged and com.lex surgical *** types of surgeries increase the risk of physical and psychological stressors,which m.y in turn m.ke these physicians prone to workrelated occupational *** The aim.of this study was to explore in orthopedic oncologists,the prevalence of work-related physical injuries and psychological *** A m.dified version of the physical discom.ort survey was developed to assess occupational injuries am.ng orthopedic oncology surgeon m.m.ers of the m.sculoskeletal Tum.r Society,the Canadian Orthopedic Oncology Society and European m.sculoskeletal Oncology *** survey was sent by em.il,and it explored m.sculoskeletal com.laints,psychological disturbances,treatm.nt required for these com.laints and the requirem.nt of tim. off *** A total of 67 surgeon responses were collected.A high num.er of orthopedic oncologists(84%)reported an occupational *** back pain(39%)was the m.st prevalent m.sculoskeletal condition,followed by lum.ar disk herniation(16%),shoulder tendinitis(15%)and lateral epicondylitis(13%).Of the cohort,46%required surgery and 31%required tim. off work due to their ***-three respondents reported a psychological ***(27%),anxiety(20%)and insom.ia(20%)were the m.st com.only *** required off work due to injury was associated with old age and years in *** Orthopedic oncology surgeons report a high prevalence of work-related *** back related injury and burnout were the m.st reported *** operative room.ergonom.cs and prevention of stress related to the work environm.nt should be areas to explore in upcom.ng research.

关键词： Orthopedic oncology Surgeons Occupational m.sculoskeletal Injuries

Rapid transaction to load variations of active filter supplied by PV system

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Frontiers in Energy 2014年第3期8卷 335-344页

作者： m. BENADJA S. saad A. BELHAm.A Laboratoire System.s Electrom.caniques Badji-Mokhtar Annaba University B.P. 12 Annaba 23000 Alegria

This paper deals with the analysis and control of a photovoltaic （PV） system.connected to the m.in supply through a Boost converter and shunt active filter supplied by a PV system.providing continuous supply of nonlinear load in variation. A robust control of a PV system.connected to the grid while feeding a variable nonlinear load is developed and highlighted. This developm.nt is based on the control of the Boost converter to extract the m.xim.m.power from.the PV system.using the Perturb and Observe （P and O） algorithm.in the presence of tem.erature and illum.nation. The proposed m.deling and control strategy provide power to the variable nonlinear load and facilitates the transfer of power from.solar panel to the grid while im.roving the quality of energy （harm.nic currents com.ensation, power factor com.ensation and dc bus voltage regulation）. Validation of the developed m.del and control strategy is conducted using power system.sim.lator Sim.Power System.Blockset m.tlab/Sim.link. To dem.nstrate the effectiveness of the shunt active filter to load changes, the m.thod of instantaneous power （pq theory） is used to identify harm.nic currents. The obtained results show an accurate extraction of harm.nic currents and perfect com.ensation of both reactive power and harm.nic currents with a lower THD and in accordance with the IEEE-519 standard.

关键词： solar panels m.xim.m.power point tracking(m.PT) DC/DC converter (Boost) shunt active filter,instantaneous power control power quality harm.nics,im.alances reactive energy

Ozonation of ibuprofen in presence of SrWO4/ZnO photo-catalyst

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Em.rging Contam.nants 2022年第1期8卷 391-399页

作者： Hesham.Alhum.de Javaid Akhtar saad Al-Shahrani Iqbal Ahm.d m.ujdin m.B.Tahir Departm.nt of Chem.cal&m.terials Engineering King Abdulaziz UniversityJeddah 21589Saudi Arabia Institute of Chem.cal Engineering&Technology University of the PunjabLahorePakistan Center of Excellence in Desalination Technology King Abdulaziz UniversityP.O.Box 80200Jeddah 21589Saudi Arabia Departm.nt of Physics University of the GujratGujratPakistan Departm.nt of m.chanical Engineering King Abdulaziz UniversityP.O.Box 80200Jeddah 21589Saudi Arabia

The study was perform.d for rem.ving ibuprofen from.water using ozonation with visible light SrWO4/ZnO *** the rem.val of Ibuprofen,the overall reaction was carried out in a glass reactor in the presence of UV light and constant supply of *** m.xim.m.rem.val efficiency of Ibuprofen was 93%at 0.1 m./L initial Ibuprofen concentration,and 0.35 g/L catalyst concentration keeping the contact tim. 30 *** a certain value,an increase in a concentration of doping agent,catalyst as well as initial Ibuprofen concentration results in a decrease of efficiency of the *** prepared photo catalysts were characterized by X-ray diffraction,FTIR spectra and SEm.*** peaks and FTIR spectra has clearly shown that the doping of SrWO4 with ZnO showed better result as com.ared to *** analysis showed that they spherical nano-com.osite crystals were dom.nant in *** character was found to reduce after ozonation of *** by products were form.d and were identified through GC-m. *** results,it was found that com.ination of SrWO4/ZnO was able to rem.ve 93%of ibuprofen and 0.4%dopping of ZnO on SrWO4 was found to be *** pattern of by products were identitified in GC-m. with various m.ss ratios as 177,92,57,*** 55%rem.val of BOD was observed in this *** study was found to be useful for rem.val of pharm.ceuticals and other sim.lar pollutants from.water effectively.

关键词： Ozonation Ibuprofen Photo-catalyst GC-m. BOD SrWO4/ZnO

Noisy ECG Signal Data Transform.tion to Augm.nt Classification Accuracy

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Com.uters, m.terials & Continua 2022年第5期71卷 2191-2207页

作者： Iqra Afzal Fiaz m.jeed m.ham.ad Usm.n Ali Shahzada Khurram.Akber Abid Gardezi Shafiq Ahm.d saad Aladyan Alm.twally m.m.stafa m.ham.ad Shafiq Departm.nt of Inform.tion Technology University of GujratGujrat50700Pakistan Departm.nt of Com.uter Science University of GujratGujrat50700Pakistan Faculty of Com.uting The Islamia University of BahawalpurBahawalpur63100Pakistan Departm.nt of Com.uter Science COMSATS University IslamabadIslamabadPakistan Industrial Engineering Departm.nt College of EngineeringKing Saud UniversityP.O.Box 800Riyadh 11421Saudi Arabia Departm.nt of Inform.tion System. College of Computer and Information SciencesKing Saud UniversityP.O.Box 800Riyadh11421Saudi Arabia Departm.nt of Inform.tion and Com.unication Engineering Yeungnam UniversityGyeongsan38541Korea

In this era of electronic health,healthcare data is very im.ortant because it contains inform.tion about hum.n *** addition,the Internet of Things(IoT)revolution has redefined m.dern healthcare system. and m.nagem.nt by providing continuous *** this case,the data related to the heart is m.re im.ortant and requires proper *** the analysis of heart data,Electrocardiogram.ECG)is *** this work,m.chine learning techniques,such as adaptive boosting(AdaBoost)is used for detecting norm.l sinus rhythm.atrial fibrillation(AF),and noise in ECG signals to im.rove the classification *** proposed m.del uses ECG signals as input and provides results in the form.of the presence or absence of disease AF,and classifies other signals as norm.l,other,or *** article derives different features from.the signal using m.xim.l Inform.tion Coefficient(m.C)and m.nim.m.Redundancy m.xim.m.Relevance(m.m.)technique,and then classifies them.based on their *** the ECG contains som. kind of noise and irregular data stream. so the purpose of this study is to rem.ve artifacts from.the ECG signal by deploying the m.thod of Second-Order-Section(SOS)(filter)and correctly classify *** features were extracted to im.rove the detection of ECG *** with existing m.thods,this work gives prom.sing results and can help im.rove the classification accuracy of the ECG signals.

关键词： ECG atrial fibrillation adaptive boosting heart rate variability

Exploitation of the antibacterial,antibiofilm.and antioxidant activities of Salvadora Persica(m.swak)extract

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Journal of Bioresources and Bioproducts 2023年第1期8卷 59-65页

作者： Gam.l m.El-Sherbiny Ahm.d m.ham.d Gazelly m.ham.ed H.Sharaf saad A.m.ghannem. Shehata m.E m.hm.ud K.A.Ism.il Ahm.d S.El-Hawary Botany and m.crobiology Departm.nt Faculty of Science(Boys)Al-Azhar UniversityCairo 11884Egypt

The Salvadora persica(***)*** stick,usually known as m.swak,is still being em.ployed as an oral hygiene agent for plaque and gingivitis *** study aim. to assess the antibacterial,antibiofilm.antioxidant,and phytochem.cal profile of *** *** ***-sica was purchased from.a local m.rket,grinded and extracted with petroleum.*** disk dif-fusion,m.crodilution,and m.cro-plate assays were perform.d to evaluate the antibacterial and an-tibiofilm.activities of the prepared extract at different concentrations against𝛽-lactam.resistance Streptococcus *** radical scavenging 2,2-diphenyl-1-picrylhydrazyl(DPPH)and stable radical cationic chrom.phore,2,2-azinobis-(3-ethylbenzothiazoline-6-sulfonate)(ABTS)m.thods were used to determ.ne their antioxidant *** and spectrom.tric analyses were perform.d using gas chrom.tography-m.ss(GC-m.)*** m.nim.m.inhibitory concentration(m.C)of *** extract against𝛽-lactam.resistance Streptococcus species ranged from.6.25 to 12.5 m./*** m.xim.m.suppression of biofilm.form.tion by *** extract was observed at m.C with a percentage of 68.66%,against Streptococcus *** *** ex-tract exhibited antioxidant activity with IC 50 of 20μg/m. and 35μg/m. from.DPPH and ABTS,*** phytochem.cal characterization showed the presence of 22 com.ounds with m.-jor com.ounds;benzyl isothiocyanate(36.21%)and n-hexadecanoic acid(27.62%).The *** extract exhibited antibacterial activity against𝛽-lactam.resistant Streptococcus species,showing a prom.sing natural alternative that could be a treatm.nt option.

关键词： β-lactam.resistance Streptococcus species S.persica extract Antibacterial Antibiofilm Antioxidant GC-m. analysis

Geotectonic significance of the Neoproterozoic ophiolitic m.tagabbros of m.iswirab area,South Eastern Desert,Egypt:constraints from.their m.neralogical and geochem.cal characteristics

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Acta Geochim.ca 2020年第6期39卷 887-910页

作者： m.ustafa m.m.gahed Wlaa m.hm.ud saad Geology Departm.nt Faculty of ScienceBenha University-EgyptP.O.Box 13518BenhaEgypt

Petrological and geochem.cal studies of Neo-proterozoic m.tagabbros were carried out in the m.iswirab area,South Eastern Desert of *** m.iswirab area com.rises of ophiolitic m.tagabbroic rocks(m.m.,which are tectonically thrusted over a thick pile of m.tavolcanic rocks and intruded by syn-and post-tectonic granitoid *** whole-rock geochem.cal variations coupled with chem.cal com.ositions of m.neral constituents are used to attain the genesis and tectonic evolution of the studied *** geotherm.barom.tric investiga-tion of the analyzed am.hiboles from.m.m.revealed that these m.tagabbros underwent regional m.tam.rphism.under lower to upper greenschist facies(biotite zone)conditions(at a tem.erature of 450 to 500℃and pressure of 1-3 kbar).Geochem.cally,the m.tagabbros(m.m.show tholeiitic affinity and cxhibiting both arc-and m.RB-like characters as evidenced by their clinopyrox-ene com.ositions and the Ti/V ratios(11.84-31.65),which considered as prom.nent features of forearc tectonic *** geochem.cal features suggest a probable fractionation of olivine±clinopyroxene±plagioclase as well as insignificant crustal *** parental m.gm. of the investigated m.m.rocks seem. to be developed in a sub-arc m.ntle wedge setting due to the enrichm.nts of LILE(e.g..Rb,Ba,Sr,Pb)over HFSE(e.g,Ti,Nb,Y,Zr,Hf,Ta).The studied m.m.rocks have lower values of Nb/U relative to m.RB and OIB indicating that their geochem.cal variation produced due to the enrichm.nt of a lithosphere m.ntle by OIB like *** ratios of Zn/Fet,La/Sm.Sm.Yb,Th/Yb and Nb/Yb indicate that the m.m.rocks represent a fragm.nt of oceanic crust originated at a supra-subduction zone environm.nt and their parental m.gm. developed by 5-30%partial m.lting of a spinel lherzolite m.ntle rather than pyroxenite in an island arc setting and conform.ble with m.st of the Egyptian ophiolitic m.tagabbros.

关键词： Egypt Eastern Desert m.iswirab area Ophiolitic m.tagabbros N-m.RB Arc tholeiites Foreare tectonic regim. Volcanic-arc setting