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Accelerati.n of solar wi.d parti.les due to i.erti.l Alfvén waves

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Communi.ati.ns i. Theoreti.al Physi.s 2024年第6期76卷 137-141页

作者： Ki.an Batool i.ran A Khan M shamir Abdul Kabi. S Ayaz Theoreti.al Physi.s Department National Centre for PhysicsIslamabad 44000Pakistan Department of Space Sci.nces Institute of Space TechnologyIslamabad 44000Pakistan Space and Astrophysi.s Research Lab(SARL) National Center of GIS and Space Applications(NCGSA)Islamabad 44000Pakistan Salam Chai. Department of PhysicsGC University LahoreKatchery RoadLahorePunjab 54000Pakistan Department of Space Sci.nce and CSPAR University of Alabama in HuntsvilleHuntsvilleAL 35899United States of America

Gai.i.g an understandi.g of the effects and dynami.s of the solar wi.d i. cruci.l for the study of space weather,Earth's magnetosphere,spacecraft protecti.n,the dynami.s of the Solar System,and vari.us other *** show that Alfvén waves effecti.ely transfer energy to resonant *** study demonstrates how i.erti.l Alfvén waves deli.er thei. energy to resonant plasma parti.les i. di.ferent solar envi.onments under certai. *** analysi. shows that i.erti.l Alfvén waves experi.nce more rapi. dampi.g wi.h i.creasi.g parallel wavenumber,ambi.nt magneti. fi.ld strength,and parti.le number densi.y,coupled wi.h a decrease i. *** rate of energy transfer to resonant parti.les i.tensi.i.s wi.h hi.her temperatures and reduced parallel wavenumber and parti.le number *** wi.h hi.her i.i.i.l veloci.i.s acti.ely parti.i.ate i. Landau dampi.g,especi.lly i. regi.ns wi.h a stronger ambi.nt magneti. fi.ld.

关键词： solar wi.d i.erti.l Alfven waves resonant parti.les

Colorectal resecti.ns for mali.nancy: A pi.ot study compari.g conventi.nal vs freehand robot-assi.ted laparoscopi. colectomy

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World Journal of Cli.i.al Cases 2024年第3期12卷 488-494页

作者： shamir O Cawi.h Joseph Marti. Plummer Sahle Gri.fi.h Vi.ay Naraynsi.gh Department of Surgery University of the West IndiesSt AugustineTrinidad and Tobago Department of General Surgery and Consultant General and Colorectal Surgeon Department of SurgeryUniversity of the West IndiesKingstonKIN7Jamaica Department of Surgery Queen Elizabeth HospitalBridgetownBarbados Department of Surgery Port of Spain General HospitalPort of SpainTrinidad and Tobago

BACKGROUND Laparoscopi. colectomy i. wi.ely accepted as a safe operati.n for colorectal cancer,but we have experi.nced resi.tance to the i.troducti.n of the FreeHandffroboti. camera holder to augment laparoscopi. colorectal *** To compare the i.i.i.l results between conventi.nal and FreeHandffrobot-assi.ted laparoscopi. colectomy i. Tri.i.ad and *** Thi. was a prospecti.e study of outcomes from all laparoscopi. colectomi.s per-formed for colorectal carci.oma from November 29,2021 to May 30,*** followi.g data were recorded:Operati.g ti.e,conversi.ns,esti.ated blood loss,hospi.ali.ati.n,morbi.i.y,surgi.al resecti.n margi.s and number of nodes *** data were entered i.to an excel database and the data were analyzed usi.g SPSS ver *** There were 23 pati.nts undergoi.g colectomi.s for mali.nant di.ease:8(35%)FreeHandff-assi.ted and 15(65%)conventi.nal laparoscopi. *** were no *** ti.e was si.ni.i.antly lower i. pati.nts under-goi.g robot-assi.ted laparoscopi. colectomy(95.13±9.22 vs 105.67±11.48 mi.;P=0.045).Otherwi.e,there was no di.ference i. esti.ated blood loss,nodal harvest,hospi.ali.ati.n,morbi.i.y or *** The FreeHandffrobot for colectomi.s i. safe,provi.es some advantages over conventi.nal laparoscopy and does not compromi.e oncologi. standards i. the resource-poor Cari.bean setti.g.

关键词： Laparoscopi. Colectomy Robot Surgery Mi.i.ally i.vasi.e

A si.ple method for pulse contrast enhancement vi. self-focusi.g

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Hi.h Power Laser Sci.nce and Engi.eeri.g 2024年第2期12卷 51-61页

作者： Zahari. Refaeli.Gi.ad Marcus Yari. shamir Appli.d Physi.s Di.i.i.n Soreq NRCYavneIsrael Appli.d Physi.s i.sti.ute The Hebrew UniversityThe Edmond J.Safra Campus-Givat RamJerusalemIsrael

Here we report on a si.ple-to-i.plement and cost-effecti.e approach for laser pulse contrast enhancement,based on the χ(3)nonli.ear self-focusi.g *** i.tenti.nally i.duced and gently controlled self-focusi.g i. a thi. glass transforms the ti.e-dependent i.tensi.y i.to vari.ti.n i. beam *** by a spati.l di.cri.i.ati.g fi.ter,only the strongly focused fracti.n traverses the setup,at the expense of effi.i.ncy.A numeri.al model,accounti.g for the pulse and materi.l parameters vi. a Gaussi.n ABCD matri.,provi.es an esti.ate for the i.stantaneous beam wai.t and transmi.si.n effi.i.ncy,whi.h enables us to evaluate the resulti.g contrast *** esti.ated contrast enhancement spans between 0.5 and 2.5 orders of magni.ude,i. conjuncti.n wi.h approxi.ately 25%–90%esti.ated effi.i.ncy,dependi.g on the pulse *** a preli.i.ary experi.ent we demonstrated the effect wi.h 10s-μJ sub GW regi.e wi.h approxi.ately 40%effi.i.ncy and a contrast i.provement of more than or equal to 20 dB.

关键词： nonli.ear opti.s pulse contrast self-focusi.g ultrafast laser

Li.er surface depressi.ns i. the presence of di.phragmati. muscular bands on trans-i.lumi.ati.n

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World Journal of Experi.ental Medi.i.e 2024年第2期14卷 5-10页

作者： shamir O Cawi.h Mi.hael T Gardner Ramanand Shetty Jean Pi.rre Loubouti. Zeni.a Dabi.han Shaneeta Johnson Department of Surgery University of the West IndiesSt AugustineTrinidad and Tobago Secti.n of Anatomy Department of Basic Medical SciencesUniversity of the West IndiesKingston KIN7Jamaica Department of Surgery Morehouse School of MedicineAtlantaGA 30310United States

Tradi.i.nal descri.ti.ns of li.er anatomy refer to a smooth,convex surface contacti.g the *** depressi.ns are recogni.ed anatomi. *** are many theori.s to explai. the cause of the *** di.cuss the theory that these are... 详细信息

关键词： Li.er Anatomy Depressi.ns Fi.sure Groove Sulcus Vari.nt

Hepati. grooves:An observati.nal study at laparoscopi. surgery

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World Journal of Experi.ental Medi.i.e 2024年第2期14卷 97-102页

作者： shamir O Cawi.h Dexter A Thomas Fawwaz Mohammed Mi.hael T Gardner Marlene Crai.i. Shaneeta Johnson Ramnanand S Kedambady Department of Surgery University of the West IndiesSt Augustine 000000Trinidad and Tobago Department of Surgery Port of Spain General HospitalPort of Spain 000000Trinidad and Tobago Secti.n of Anatomy Basic Medical SciencesUniversity of the West IndiesKingston 000000Jamaica Department of Radi.logy University of the West IndiesKingston 000000Jamaica Department of Surgery Morehouse School of MedicineAtlantaGA 30310United States Secti.n of Anatomy Department of Basic Medical SciencesUniversity of the West IndiesKingston KIN7Jamaica

BACKGROUND i. tradi.i.nal descri.ti.ns,the upper surface of the li.er i. smooth and convex,but deep depressi.ns are vari.nts that are present i. 5%-40%of *** sought to determi.e the relati.nshi. between surface depressi.ns and the *** To use exploratory laparoscopy to determi.e the relati.nshi. between surface depressi.ns and the *** An observati.nal study was performed i. all pati.nts undergoi.g laparoscopi. upper gastro-i.testi.al operati.ns between January 1,2023 and January 20,2024.A thi.ty-degree laparoscope was used to i.spect the li.er and *** surface depressi.ns were present,we recorded pati.nt demographi.s,presence of di.phragmati. bands,ri. protrusi.ns and/or any other source of compressi.n duri.g *** Of 394 pati.nts,343 had normal surface anatomy,and 51(12.9%)had promi.ent surface depressi.ns on the *** was no si.ni.i.ant relati.nshi. between the presence of surface depressi.ns and gender nor the presence of ri. ***,there was si.ni.i.ant associ.ti.n between the presence of surface depressi.ns and di.phragmati. muscular bands(Pi.N Wi.h these data,the di.phragmati.-band theory has gai.ed i.creased i.portance over other theori.s for surface *** studi.s are warranted usi.g cross secti.nal i.agi.g to confi.m relati.nshi.s wi.h i.tersecti.nal planes as well as beta-cateni. assays i. the affected li.er parenchyma.

关键词： Li.er Vari.nt Vei. Hepati. Surgery

Rescue from compli.ati.ns after pancreati.oduodenectomi.s at a low-volume Cari.bean center:Value of tai.ored peri.pancreatectomy protocols

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World Journal of Gastroi.testi.al Surgery 2024年第3期16卷 681-688页

作者： shamir O Cawi.h Eli.ah Di.on Parul J Shukla Shai.esh V Shri.hande Rahul R Deshpande Fawwaz Mohammed Nei. W Pearce Wesley Franci. Shaneeta Johnson Johann Bujhawan Department of Surgery University of the West IndiesSt Augustine 000000Trinidad and Tobago Department of Surgery Faculty of MedicineUniversity of CalgaryCalgaryAlberta T2N2T9Canada Department of Surgery Weill Cornell Medical CollegeNew YorkNY 10065United States Department of Surgi.al Oncology Tata Memorial CenterHomi Bhabha National UniversityMumbai 400012India Department of Surgery Manchester Royal InfirmaryManchester M139WLUnited Kingdom Uni.ersi.y Surgi.al Uni. Southampton General HospitalSouthampton SO166YDUnited Kingdom Department of Surgery University of the West IndiesNassau N-1184Bahamas Department of Surgery Morehouse School of MedicineAtlantaGA 30310United States Department of Surgery General Hospital in Port of SpainPort of Spain 000000Trinidad and Tobago

BACKGROUND Pancreati.oduodenectomy(PD)i. a techni.ally complex operati.n,wi.h a re-lati.ely hi.h ri.k for *** abi.i.y to rescue pati.nts from post-PD compli.ati.ns i. as a recogni.ed quali.y *** protocols were i.sti.uted at our low volume faci.i.y i. the year *** To document the rate of rescue from post-PD compli.ati.ns wi.h tai.ored protocols i. place as a measure of *** A retrospecti.e audi. was performed to collect data from pati.nts who experi.nced major post-PD compli.ati.ns at a low volume pancreati. surgery uni. i. Tri.i.ad and Tobago between January 1,2013 and June 30,***-dardi.ed defi.i.i.ns from the i.ternati.nal Study Group of Pancreati. Surgery were used to defi.e post-PD compli.ati.ns,and the modi.i.d Clavi.n-Di.do classi.i.ati.n was used to classi.y post-PD *** Over the study peri.d,113 pati.nts at a mean age of 57.5 years(standard devi.ti.n[SD]±9.23;range:30-90;medi.n:56)underwent PDs at thi. *** compli.ati.ns were recorded i. 33(29.2%)pati.nts at a mean age of 53.8 years(SD:±7.9).Twenty-ni.e(87.9%)pati.nts who experi.nced major morbi.i.y were salvaged after aggre-ssi.e treatment of thei. ***(3.5%)di.d from bleedi.g pseudoaneurysm(1),septi. shock secondary to a bi.e leak(1),anastomoti. leak(1),and myocardi.l i.farcti.n(1).There was a si.ni.i.antly greater salvage rate i. pati.nts wi.h Ameri.an Soci.ty of Anesthesi.logi.ts scores≤2(93.3%vs 25%;P=0.0024).CONCLUSi.N Thi. paper adds to the growi.g body of evi.ence that volume alone should not be used as a marker of quali.y for pati.nts requi.i.g *** low volumes at our faci.i.y,we demonstrated that 87.9%of pati.nts were rescued from major *** attri.uted thi. to several factors i.cludi.g development of rescue protocols,the competence of the pancreati. surgery teams and conti.uous,and adapti.e learni.g by the enti.e i.sti.uti.n,cul-mi.ati.g i. the development of tai.ored peri.pancreatectomy protoc

关键词： Pancreas Compli.ati.n Rescue Fai.ure Morbi.i.y Mortali.y Pancreati.oduodenectomy

On the role of geometry i. geo-locali.ati.n

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Computati.nal Vi.ual Medi. 2021年第1期7卷 103-113页

作者： Moti.Kadosh Yael Moses Ari.l shamir Department of Electri.al Engi.eeri.g Tel-Aviv UniversityTel-AvivIsrael The Efi.Arazi.School of Computer Sci.nce The Interdisciplinary Center HerzliyaHerzliyaIsrael

Consi.er the geo-locali.ati.n task of fi.di.g the pose of a camera i. a large 3 D scene from a si.gle *** exi.ti.g CNN-based methods use as i.put textured *** ai. to experi.entally explore whether texture and correlati.n between nearby i.ages are necessary i. a CNN-based soluti.n for the geo-locali.ati.n *** do so,we consi.er lean i.ages,textureless projecti.ns of a si.ple 3 D model of a *** only contai. i.formati.n related to the geometry of the scene vi.wed(edges,faces,and relati.e depth).The mai. contri.uti.ns of thi. paper are:(i.to demonstrate the abi.i.y of CNNs to recover camera pose usi.g lean i.ages;and(i.)to provi.e i.si.ht i.to the role of geometry i. the CNN learni.g process.

关键词： geo-locali.ati.n geometry CNN-based soluti.ns syntheti. lean i.ages

Plane Symmetri. Soluti.ns i. f(R,T) Gravi.y

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Communi.ati.ns i. Theoreti.al Physi.s 2016年第3期65卷 301-307页

作者： M.Farasat shamir Department of Sci.nces and Humani.i.s National University of Computer and Emerging SciencesLahore Campus

The mai. purpose of thi. paper i. to i.vesti.ate the exact soluti.ns of plane symmetri. spaceti.e i. the context of f(R,T)gravi.y[***.D 84(2011)024020],where f(R,T)i. an arbi.rary functi.n of Ri.ci.scalar R and trace of the energy momentum tensor *** explore the exact soluti.ns for two di.ferent classes of f(R,T)*** fi.st class f(R,T)=R+2f(T)yi.lds a soluti.n whi.h corresponds to Taub's metri. whi.e the second class f(R,T)=f_1(R)+f_2(T)provi.es two addi.i.nal soluti.ns whi.h i.clude the well known anti.deSi.ter *** energy densi.i.s and correspondi.g functi.ns for f(R,T)models are evaluated i. each case.

关键词： f(R T)gravi.y plane symmetri. spaceti.e

Energy Bounds for Stati. Spheri.ally Symmetri. Spaceti.e i. f(R, G) Gravi.y

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Communi.ati.ns i. Theoreti.al Physi.s 2018年第8期69卷 190-196页

作者： M.Farasat shamir Ayesha Komal Department of Sci.nces and Humani.i.s National University of Computer and Emerging Sciences

The mai. purpose of thi. paper i. to i.vesti.ate energy bounds i. the context of f(R, G) gravi.y. To meet thi. ai., we choose stati. spheri.ally symmetri. spaceti.e i. f(R, G) gravi.y to develop the fi.ld equati.ns. We select three di.ferent models of f(R, G) gravi.y, whi.h are thoroughly di.cussed i. the li.erature. Fi.stly, the i.equali.i.s are formulated usi.g energy bounds and then vi.bi.i.y of the consi.ered models are checked respecti.ely. Graphi.al analysi. show that speci.i. f(R, G) gravi.y models are sati.fi.d under sui.able values of model parameters. i. i. shown that i. a certai. case energy bounds are sati.fi.d expect SEC, whi.h supports the late ti.e accelerati.n expansi.n of unverse.

关键词： energy bounds f(R G) gravi.y