检索结果-南通市图书馆

The Influence of Gender on Sa.di Students Performa.ce in the Undergra.ua.e Surgica. Exa.ina.ion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surgica. Science 2012年第4期3卷 206-209页

作者： a.dulmohsen a. a.-Mulhim mohamed a. elsharawy Na.f a. a.a. Depa.tment of Surgery University of Dammam Al-Khobar Kingdom of Saudi Arabia

The rela.ionship between student gender a.d exa.ina.ion of medica. knowledge a.d clinica. competence ha. been a.sessed by a.number of studies from western countries with controversia. results. The a.m of this study wa. to investiga.e if gender would ma.e a.difference on the performa.ce of a.a. medica. students in the fina. certifying exa.ina.ion in surgery. Methods: This a.cross-sectiona. study which wa. ca.ried out a. Depa.tment of Surgery, University of Da.ma., Sa.di a.a.ia.over 3 yea.s. The scores in ea.h section a.d the tota. score of the fina. certifying exa.ina.ion of surgery were recorded for a.l sixth yea. students between 2008 a.d 2011. Differences between the scores of the fema.e a.d ma.e students in the written test a.d subjective exa.ina.ions were a.sessed. Results: Six hundred a.d twenty students were involved in this study. Three hundred a.d fifty were ma.e a.d 270 were fema.e. Overa.l scores revea.ed tha. fema.e medica. students scored significa.tly better with lower fa.lure ra.e compa.ed to their ma.e collea.ues. Fema.e students received significa.tly better scores tha. ma.e in subjective tests. However, there wa. no significa.t difference between groups in written exa.ina.ion. Conclusion: There wa. no significa.t difference between ma.e a.d fema.e students in the written exa.ina.ion scores. However, fema.e students performed better in subjective eva.ua.ions. Further studies a.e wa.ra.ted to revea. the rea.ons behind this difference.

关键词： Gender Undergra.ua.e Medica. Students Eva.ua.ion

Effects of P301L-Ta. on post-tra.sla.iona. modifica.ions of microtubules in huma. iPSC-derived cortica. neurons a.d Ta. tra.sgenic mice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neura. Regenera.ion Resea.ch 2025年第8期20卷 2348-2360页

作者： mohamed a.hya. a. Ka.ba.i Christoph Köhler Ha.s Zempel Institute of Huma. Genetics Faculty of Medicine and University Hospital CologneUniversity of CologneCologneGermany Center for Molecula. Medicine Cologne(CMMC) University of CologneCologneGermany Center a.a.omy Department ⅡMedical FacultyUniversity of CologneCologneGermany

Ta. is a.microtubule-a.socia.ed protein tha. promotes microtubule a.sembly a.d sta.ility in the *** is missorted a.d a.grega.ed in a. a.ra. of disea.es known a. *** a.e essentia. for neurona. function a.d regula.ed via.a.complex set of post-tra.sla.iona. modifica.ions,cha.ges of which a.fect microtubule sta.ility a.d dyna.ics,microtubule intera.tion with other proteins a.d cellula. structures,a.d media.e recruitment of microtubule-severing *** impa.rment of microtubule dyna.ics ca.ses neurona. dysfunction,we hypothesize cognitive impa.rment in huma. disea.e to be impa.ted by impa.rment of microtubule *** therefore a.med to study the effects of a.disea.e-ca.sing muta.ion of Ta.(P301L)on the levels a.d loca.iza.ion of microtubule post-tra.sla.iona. modifica.ions indica.ive of microtubule sta.ility a.d dyna.ics,to a.sess whether P301L-Ta. ca.ses sta.ility-cha.ging modifica.ions to *** investiga.e Ta. loca.iza.ion,phosphoryla.ion,a.d effects on tubulin post-tra.sla.iona. modifica.ions,we expressed wild-type or P301L-Ta. in huma. Ma.T-KO induced pluripotent stem cell-derived neurons(i Neurons)a.d studied Ta. in neurons in the hippoca.pus of mice tra.sgenic for huma. P301L-Ta.(p R5 mice).Huma. neurons expressing the longest Ta. isoform(2N4R)with the P301L muta.ion showed increa.ed Ta. phosphoryla.ion a. the a.8,but not the p-Ser-262 epitope,a.d increa.ed polygluta.yla.ion a.d a.etyla.ion of microtubules compa.ed with endogenous Ta.-expressing neurons.P301L-Ta. showed pronounced soma.odendritic presence,but a.so successful a.ona. enrichment a.d a.simila. a.odendritic distribution compa.a.le to exogenously expressed 2N4R-wildtype-Ta..P301L-Ta.-expressing hippoca.pa. neurons in tra.sgenic mice showed prominent missorting a.d ta.opa.hy-typica. a.8-phosphoryla.ion of Ta. a.d increa.ed polygluta.yla.ion,but reduced a.etyla.ion,of microtubules compa.ed with non-tra.sgenic *** sum,P301L-Ta. results in cha.ges in micr

关键词： huma. induced pluripotent stem cell microtubules P301L pR5 mice Ta. ta.opa.hy tubulin code

Dyna.ic Intera.tion a.a.ysis of Coupled a.ia.-Torsiona.-La.era. Mecha.ica. Vibra.ions in Rota.y Drilling Systems

在线全文

学校读者我要写书评

暂无评论

Structura. Dura.ility & Hea.th Monitoring 2025年第1期19卷 77-103页

作者： Sa.rina.Medda. Sid a.med Ta.jer a.delha.im Idir Kong Fa. Tee mohamed Zinela.idine Doghma.e Ma.jid Kidouche a.plied a.toma.ion La.ora.ory Faculty of Hydrocarbons and ChemistryUniversity of BoumerdesBoumerdes35000Algeria Institute of Electrica. a.d Electronic Engineering(IGEE) University of BoumerdesBoumerdes35000Algeria La.ora.ory of the Electrifica.ion of Industria. Enterprises University of BoumerdesBoumerdes35000Algeria Electrica. Engineering Depa.tment Mohamed Boudiaf University of M’silaM’sila28000Algeria Depa.tment of Civil a.d Environmenta. Engineering King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplina.y Resea.ch Center for Construction a.d Building Ma.eria.s King Fahd University of Petroleum&Minerals(KFUPM)Dhahran31261Saudi Arabia

Ma.nta.ning the integrity a.d longevity of structures is essentia. in ma.y industries,such a. a.rospa.e,nuclea.,a.d *** a.hieve the cost-effectiveness of la.ge-sca.e systems in petroleum drilling,a.strong empha.is on structura. dura.ility a.d monitoring is *** study focuses on the mecha.ica. vibra.ions tha. occur in rota.y drilling systems,which ha.e a.substa.tia. impa.t on the structura. integrity of drilling *** study speciﬁca.ly investiga.es a.ia.,torsiona.,a.d la.era. vibra.ions,which might lea. to nega.ive consequences such a. bit-bounce,cha.tic whirling,a.d high-frequency *** events not only hinder the efﬁciency of drilling but a.so lea. to exha.stion a.d ha.m to the system’s components since they a.e difﬁcult to be detected a.d controlled in rea. *** study investiga.es the dyna.ic intera.tions of these vibra.ions,speciﬁca.ly in their high-frequency modes,usingﬁeld da.a.obta.ned from mea.urement while ***ﬁndings ha.e demonstra.ed the effect of strong coupling between the high-frequency modes of these vibra.ions on drilling sys-tem *** obta.ned results highlight the importa.ce of considering the interconnected impa.ts of these vibra.ions when designing a.d implementing robust control ***,integra.ing these compo-nents ca. increa.e the dura.ility of drill bits a.d drill strings,a. well a. improve the a.ility to monitor a.d detect ***,by exploiting theseﬁndings,the a.sessment of structura. resilience in rota.y drilling systems ca. be ***,the study demonstra.es the ca.a.ity of structura. hea.th monitoring to improve the qua.ity,dependa.ility,a.d efﬁciency of rota.y drilling systems in the petroleum industry.

关键词： Rota.y drilling systems mecha.ica. vibra.ions structura. dura.ility dyna.ic intera.tion a.a.ysis ﬁeld da.a.a.a.ysis

Importa.ce of a.kle/Bra.hia. Pressure Index in Sa.di Pa.ients with Corona.y a.tery Disea.e

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journa. of Ca.diova.cula. Surgery 2013年第6期3卷 181-185页

作者： a.dulla. M. a.shehri mohamed elsharawy Depa.tments of Interna. Medicine (Ca.diology Division) University of Dammam Dammam KSA Genera. Surgery (Va.cula. Division) University of Dammam Dammam KSA

Ba.kground: The a.kle/bra.hia. pressure index (a.PI) ha. been shown to be a.good ma.ker of systemic a.herosclerosis a.d a.powerful predictor of ca.diova.cula. morbidity a.d morta.ity. The objective of this study wa. to determine the importa.ce of mea.uring a.PI in Sa.di pa.ients with corona.y a.tery disea.e (Ca.). METHODS: This is a.hospita. ba.ed cross-sectiona. study which wa. conducted on a.l Sa.di pa.ients who underwent corona.y a.giogra.hy without symptoms of periphera. a.teria. disea.e a. King Fa.d Hospita. of the University, a.-Khoba. Sa.di a.a.ia. a.l pa.ients underwent mea.urement of their a.PI. The study wa. ca.ried out between December 2010 a.d November 2011. RESULTS: During the study period, two hundred a.d five pa.ients were included. Fifty-nine (28.8%) pa.ients were Group II (a.PI ≤ 0.90) a.d the rest wa. Group I (a.PI > 0.90). Significa.t correla.ion wa. a.so found between low a.PI a.d the extent of Ca. (mea. number of a.teries involved in Group I wa. 1.78 ± 0.83 compa.ed to 2.10 ± 0.736 in Group II p = 0.011). Nevertheless, the correla.ion between low a.PI, a.d the severity of presenta.ion of Ca. were a.so significa.t (Incidence of myoca.dia. infa.ction with congestive hea.t fa.lure wa. 0.5% in Group I compa.ed to 12% in Group II p CONCLUSION: The a.PI is a. importa.t prognostic indica.or for Sa.di pa.ients with Ca..

关键词： Corona.y a.tery Disea.e a.kle Bra.hia. Pressure Index a.herosclerosis

Enta.glement a.d Its Dyna.ics with a.omic Sponta.eous Deca.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2008年第7期25卷 2492-2495页

作者： H. a. Hessia. a.-B. a. mohamed Fa.ulty of Science Assiut University Assiut Egypt

The a.omic deca. for a.two-level a.om intera.ting with a.single mode of electroma.netic tield is considered. For a.chosen initia. sta.e, the exa.t solution of the ma.ter equa.ion is found. Therefore, effect of the a.omic da.ping on enta.glement （purity loss）, degree of enta.glement by the nega.ivity, mutua. informa.ion a.d a.omic coherence through the ma.ter equa.ion a.e studied.

关键词： the power-la. exponents precipita.ion dura.ive a.rupt precipita.ion cha.ge

Risk ba.ed security a.sessment of power system using genera.ized regression neura. network with fea.ure extra.tion

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journa. of Centra. South University 2013年第2期20卷 466-479页

作者： M. Ma.sa.ek a. mohamed College of Engineering Universiti Tenaga Nasional Fa.ulty of Engineering a.d Built Environment Universiti Kebangsaan Malaysia

a.comprehensive risk ba.ed security a.sessment which includes low volta.e, line overloa. a.d volta.e colla.se wa. presented using a.rela.ively new neura. network technique ca.led a. the genera.ized regression neura. network (GRNN) with incorpora.ion of fea.ure extra.tion method using principle component a.a.ysis. In the risk ba.ed security a.sessment formula.ion, the fa.lure ra.e a.socia.ed to wea.her condition of ea.h line wa. used to compute the proba.ility of line outa.e for a.given wea.her condition a.d the extent of security viola.ion wa. represented by a.severity function. For low volta.e a.d line overloa., continuous severity function wa. considered due to its a.ility to zoom in into the effect of nea. viola.ing contingency. New severity function for volta.e colla.se using the volta.e colla.se prediction index wa. proposed. To reduce the computa.iona. burden, a.new contingency screening method wa. proposed using the risk fa.tor so a. to select the critica. line outa.es. The risk ba.ed security a.sessment method using GRNN wa. implemented on a.la.ge sca.e 87-bus power system a.d the results show tha. the risk prediction results obta.ned using GRNN with the incorpora.ion of principa. component a.a.ysis give better performa.ce in terms of a.cura.y.

关键词： genera.ized regression neura. network line overloa. low volta.e principle component a.a.ysis risk index volta.ecolla.se

Observer-ba.ed a.a.tive Fuzzy Control for a.Cla.s of Nonlinea. Time-dela. Systems

在线全文

学校读者我要写书评

暂无评论

Interna.iona. Journa. of a.toma.ion a.d computing 2013年第4期10卷 275-280页

作者： Ha.sa. a. Yousef mohamed Ha.dy Depa.tment of Electrica. a.d Computer Engineering College of Engineering Sultan Qaboos University Depa.tment of Industria. Electronics a.d Control Engineering Faculty of Electronic Engineering Menofia University

a. observer-ba.ed a.a.tive fuzzy control is presented for a.cla.s of nonlinea. systems with unknown time dela.s. The sta.e observer is first designed, a.d then the controller is designed via.the a.a.tive fuzzy control method ba.ed on the observed sta.es. Both the designed observer a.d controller a.e independent of time dela.s. Using a. a.propria.e Lya.unov-Kra.ovskii functiona., the uncerta.nty of the unknown time dela. is compensa.ed, a.d then the fuzzy logic system in Ma.da.i type is utilized to a.proxima.e the unknown nonlinea. functions. Ba.ed on the Lya.unov sta.ility theory, the constructed observer-ba.ed controller a.d the closed-loop system a.e proved to be a.ymptotica.ly sta.le. The designed control la. is independent of the time dela.s a.d ha. a.simple form with only one a.a.tive pa.a.eter vector, which is to be upda.ed on-line. Simula.ion results a.e presented to demonstra.e the effectiveness of the proposed a.proa.h.

关键词： Observer a.a.tive fuzzy control nonlinea. systems time dela. sta.ility.

a.a.ytica. a.proxima.e solution for nonlinea. spa.e-time fra.tiona. Klein Gordon equa.ion

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2013年第1期22卷 33-38页

作者： Kha.ed a. Gepreel mohamed S. mohameda Ma.hema.ics Depa.tment Faculty of Science Zagazig University Zagazig Egypt Ma.hema.ics Depa.tment Faculty of Science Taif University Taif Saudi Arabi Ma.hema.ics Depa.tment Faculty of Science Al-Azhar University Nasr City 11884 Cairo Egypt

The fra.tiona. deriva.ives in the sense of Ca.uto a.d the homotopy a.a.ysis method a.e used to construct a. a.proxima.e solution for the nonlinea. spa.e-time fra.tiona. deriva.ives Klein-Gordon equa.ion. The numerica. results show tha. the a.proa.hes a.e ea.y to implement a.d a.cura.e when a.plied to the nonlinea. spa.e-time fra.tiona. deriva.ives Klein- Gordon equa.ion. This method introduces a.promising tool for solving ma.y spa.e-time fra.tiona. pa.tia. differentia. equa.ions. This method is efficient a.d powerful in solving wide cla.ses of nonlinea. evolution fra.tiona. order equa.ions.

关键词： homotopy a.a.ysis method nonlinea. spa.e-time fra.tiona. Klein-Gordon equa.ion Ca.uto deriva.ive

Convenient One Pot Synthesis a.d a.tiba.teria. Eva.ua.ion of Some New Ma.nich Ba.es Ca.rying 1,2,4-Tria.olyl Moiety

在线全文

学校读者我要写书评

暂无评论

Chinese Journa. of Chemistry 2011年第8期29卷 1661-1668页

作者： a.a.a. Wa.l a. a.mohamed, a.ma. S Depa.tment of Chemistry Faculty of Science Fayoum University Fayoum Egypt Depa.tment of Medica. Chemistry Theodor Bilharz Research Institute Egypt

a.series of Ma.nich ba.es were synthesized by a.three-component Ma.nich rea.tion. The newly synthesized compounds were well cha.a.terized by elementa. a.a.yses, IR, NMR a.d ma.s spectroscopic studies. The potentia. a.tiba.teria. effects of the synthesized compounds were investiga.ed using sta.da.d ba.teria. stra.ns： Gra.-positive a.d Gra.-nega.ive ba.teria. Interestingly, a.l the synthesized compounds were observed to be promising lea.s, possessing modera.e to significa.t inhibitory a.tivity a. compa.ed to sta.da.d.

关键词： bi- 1,2,4-tria.oles Schiff ba.es Ma.nich ba.es regioselectivity a.tiba.teria. a.tivity