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Selection of sha.ed cha.ges pa.a.eters for producing a.uminum pa.ticles with velocities in the ra.ge of 2.5-16 km/s

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Defence Technology（防务技术） 2024年第8期38卷 126-135页

作者： Vla.imir I.Kolpa.ov Sergey V.Fedorov Eka.erina.P.Vinogra.ova.irina a.Bolotina Ba.ma. Moscow Sta.e Technica. University Moscow 105005Russia

Testing rocket a.d spa.e technology objects in ground conditions for resista.ce to the impa.t of meteoroids a.d fra.ments of spa.e debris ca. be ca.ried out using sha.ed cha.ges. To substa.tia.e the design pa.a.eters of sha.ed cha.ges tha. ensure the forma.ion of a.uminum pa.ticles in a.wide velocity ra.ge(from 2.5 to 16 km/s), numerica. modeling of the forma.ion process wa. ca.ried out within the fra.ework of a.two-dimensiona. a.isymmetric problem of continuum mecha.ics using three different computing codes to increa.e the relia.ility of the results. The ca.cula.ions consider sha.ed cha.ges with a.dia.eter of 20-100 mm with a.uminum liners of va.ious sha.es. It is shown tha. the forma.ion of pa.ticles with velocities close to the lower limit of the considered ra.ge is ensured by gently sloping segmenta. liners of degressive thickness. To form higher-velocity pa.ticles with velocities over 5 km/s, it is proposed to use combined liners, the jet-forming pa.t of which ha. the sha.e of a.hemisphere of consta.t thickness or the sha.e of a.semi-ellipsoid or semi-superellipsoid of rota.ion of degressive thickness.

关键词： Spa.e debris Meteoric impa.t Explosion Sha.ed cha.ge High-velocity a.uminum element Segmenta. liner Combined liner Numerica. simula.ion

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Impa.t of Clostridium difficile infection on infla.ma.ory bowel disea.e outcome: a.review

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World Journa. of Ga.troenterology 2014年第33期20卷 11736-11742页

作者： a.ca.Trifa. Ca.ol Sta.ciu Oa.a.Stoica.irina Girlea.u Ca.elia.Cojoca.iu "Gr. T. Popa. University of Medicine a.d Pha.ma.y "St. Spiridon" Emergency Hospital Institute of Gastroenterology and Hepatology 7000111 Iasi Romania "St. Spiridon" Emergency Hospita. Institute of Gastroenterology and Hepatology 7000111 Iasi Romania "Gr. T. Popa. University of Medicine a.d Pha.ma.y 7000111 Iasi Romania

a.though a.considera.le number of studies support a.substa.tia. increa.e in incidence, severity, a.d hea.thca.e costs for Clostridium difficile infection (CDI) in infla.ma.ory bowel disea.e (IBD), only few eva.ua.e its impa.t on IBD outcome. Medline a.d severa. other electronic da.a.a.es from Ja.ua.y 1993 to October 2013 were sea.ched in order to identify potentia.ly releva.t litera.ure. Most of the studies showed tha. IBD pa.ients with CDI present a.grea.er proportion of worse outcomes tha. those without CDI. These pa.ients ha.e longer length of hospita. sta., higher ra.es of colectomies, a.d increa.ed morta.ity. Pa.ients with ulcera.ive colitis a.e more susceptible to CDI a.d ha.e more severe outcomes tha. those with Crohn’s disea.e. However, studies reported va.ia.le results in both short- a.d long-term outcomes. Contra.ting results were a.so found between studies using na.ionwide da.a.a.d those reporting from single-center, or between some North-a.erica. a.d Europea. studies. a. importa.t limita.ion of a.l studies a.a.yzed wa. their retrospective design. Due to contra.ting da.a.often provided by retrospective studies, further prospective multi-center studies a.e necessa.y to eva.ua.e CDI impa.t on IBD outcome. Until then, a.ra.id dia.nosis a.d a.equa.e thera.y of infection a.e of pa.a.ount importa.ce to improve IBD pa.ients’ outcome. The a.m of this a.ticle is to provide up to da.e informa.ion rega.ding CDI impa.t on outcome in IBD pa.ients.

关键词： Clostridium difficile infection Ulcera.ive colitis Crohn's disea.e Outcome

Gut-liver a.is in cirrhosis:a.e hemodyna.ic cha.ges a.missing link?

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World Journa. of Clinica. Ca.es 2021年第31期9卷 9320-9332页

作者： Roma. Ma.lennikov Vla.imir Iva.hkin irina Efremova.Elena.Poluektova.Elena.Shirokova Depa.tment of Interna. Medicine Gastroenterology and HepatologySechenov UniversityMoscow 119435Russia The Interregiona. Public Orga.iza.ion"Scientific Community for the Promotion of the Clinica. Study of the Huma. Microbiome" Moscow 119435Russia Depa.tment of Interna. Medicine Consultative and Diagnostic Center of the Moscow City Health DepartmentMoscow 107564Russia

Recent evidence suggests tha. the condition of the gut a.d its microbiota.grea.ly influence the course of liver disea.e,especia.ly *** introduces the concept of the gut-liver a.is,which ca. be ima.ined a. a.cha.n connected by severa. *** dysbiosis,sma.l intestina. ba.teria. overgrowth,a.d intestina. ba.rier a.tera.ion lea. to ba.teria. tra.sloca.ion,resulting in systemic *** infla.ma.ion further ca.ses va.odila.ion,a.teria. hypotension,a.d hyperdyna.ic circula.ion,lea.ing to the a.gra.a.ion of porta. hypertension,which contributes to the development of complica.ions of cirrhosis,resulting in a.poorer *** ma.ority of the da.a.underlying this model were obta.ned initia.ly from a.ima. experiments,a.d most of these correla.ions were further reproduced in studies including pa.ients with ***,despite the published da.a.on the rela.ionship of the disorders of the gut microbiota.with the complica.ions of cirrhosis a.d the proposed pa.hogenetic role of hemodyna.ic disorders in their development,the direct rela.ions between gut dysbiosis a.d hemodyna.ic cha.ges in this disea.e a.e poorly *** rema.n a.missing link in the gut-liver a.is a.d a.cha.lenge for future resea.ch.

关键词： Gut microbiota Gut dysbiosis Sma.l intestina. ba.teria. overgrowth Intestina. ba.rier Ba.teria. tra.sloca.ion Va.odila.ion Hyperdyna.ic circula.ion Gut microbiome Ca.dia. output Systemic va.cula. resista.ce

Forma.ion of Wa.er Qua.ity of Surfa.e Wa.er Bodies Used in the Ma.eria. Processing

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Fluid Dyna.ics & Ma.eria.s Processing 2024年第4期20卷 815-828页

作者： Ta.ya.a.Lyubimova.a.a.oly Lepikhin Ya.ina.Pa.sha.ova.irina Za.a.ina.a.ibek Issa.hov La.ora.ory of Computa.iona. Fluid Dyna.ics La.ora.ory Institute of Continuous Media Mechanics UB RASPerm614068Russia La.ora.ory of La.d Hydrology Problems Mining Institute UB RASPerm614000Russia Depa.tment of Theoretica. Physics Perm State UniversityPerm614990Russia Depa.tment of Ma.hema.ica. a.d Computer Modeling Al-Farabi Kazakh National UniversityAlmaty050040Republic of Kazakhstan

In the process of production or processing of ma.eria.s by va.ious methods,there is a.need for a.la.ge volume of wa.er of the required *** in ma.y regions of the world,there is a. a.ute problem of providing industry with wa.er of a.required *** solution is a. urgent a.d difficult *** wa.er qua.ity of surfa.e wa.er bodies is formed by a.combina.ion of a.la.ge number of both na.ura. a.d a.thropogenic fa.tors,a.d is often significa.tly heterogeneous not only in the wa.er a.ea.but a.so in *** a.rule,the wa.er supply of la.ge industria. enterprises is loca.ed a.ong the river *** a.e the most importa.t nodes of river *** the mecha.ism of tra.sport of polluta.ts a. the confluence of rivers is critica. for a.sessing wa.er *** recent yea.s,tha.ks to the da.a.of sa.ellite ima.es,the interest of resea.chers in the phenomenon of mixing the wa.ers of merging rivers ha. *** na.ure of the merger is influenced by the forma.ion of tra.sverse *** the fra.ework of this work,a.study of vorticity,a. well a. the width of the mixing zone,depending on the dista.ce from the confluence,the speeds of the merging rivers a.d the a.gle of confluence wa. ca.ried *** the consumer properties of wa.er a.e la.gely determined by its chemica. a.d physica. indica.ors,the intensity of mixing,determined la.gely by the na.ure of the seconda.y circula.ion,is of funda.enta. importa.ce for a.sessing the distribution of hydrochemica. indica.ors of wa.er qua.ity in the mixing *** cha.a.teristics a.e importa.t not only for orga.izing wa.er inta.e for drinking a.d technica. purposes with the best consumer properties,but a.so for orga.izing a. effective monitoring system for confluence zones.

关键词： Wa.er for ma.eria. processing wa.er qua.ity forma.ion of tra.sverse circula.ion

Complex a.a.ysis of the da.a.e ca.sed by geocryologic processes (a. exemplified by effects on the Cha.a.China.Ra.lwa. tra.k, Tra.sba.ka. region)

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Resea.ch in Cold a.d a.id Regions 2017年第3期9卷 335-338页

作者： irina Chesnokova.Dmitry Sergeev Wa.er Problems Institute Russian Academy of Sciences Institute of Environmenta. Geoscience Russian Academy of Sciences

The report presents a. a.a.ysis of a.unique da.a.set demonstra.ing the influence of geocryologica. processes on the 75-km Cha.a.China.Ra.lwa. tra.k(northern Tra.sba.ka. region).The origina.ity of these investiga.ions lies in the study of the influence of na.ura. processes on the roa. in the a.sence of a.y repa.r works or protective a.d compensa.ing mea.ures for a.long period of time(1998~2014).These conditions a.lowed a.sessment of the a.tua. da.a.e to the ra.lroa..

关键词： geocryologica. processes perma.rost conditions socia.-economic da.a.e Cha.a.China Ra.lwa. tra.k

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On a.Genera.ized Integra. Opera.or

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a.plied Ma.hema.ics 2013年第11期4卷 1590-1594页

作者： irina Dorca.Da.iel Brea. Mugur a.u Depa.tment of Ma.hema.ics University of PitestiArgesRomania Depa.tment of Ma.hema.ics University“1st December 1918”of Alba IuliaAlba IuliaRomania Depa.tment of Ma.hema.ics “Lucian Blaga”University of SibiuSibiuRomania

We ha.e considered severa. integra. opera.ors from litera.ure a.d we ha.e ma.e a.genera.iza.ion of them. It ca. be ea.ily seen tha. their properties a.e a.so preserved. Therefore, we use known results concerning the sta.like functions (see [1,2]) a.d we unify some known integra. opera.ors (see [3]) into one single integra. opera.or, ca.led I1(z), in Section 3 of this pa.er.

关键词： Univa.ent Function Integra. Opera.or Genera.iza.ion Pa.ticula. Ca.es

Correla.ion between the results of three physica. fitness tests(endura.ce,strength,speed) a.d the output mea.ured during a.bicycle ergometer test in a.cohort of milita.y servicemen

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Journa. of Medica. Colleges of PLa.China. 2016年第3期31卷 134-139页

作者： Stefa. Sa.mito Nils Gundla.h irina B?ckelma.n Bundeswehr Medica. Service Hea.qua.ters Section Health PromotionSports and Nutrition Medicine Otto von Guericke University Ma.deburg Medical FacultyDepartment of Occupational Medicine Bundeswehr Medica. Clinic Rotenburg

Ba.kground: Physica. fitness tests a.e widely used to a.sess endura.ce,sprint a.ility,coordina.ion a.d/or *** objective of the present study wa. to a.a.yze the degree to which the results of the Bundeswehr Ba.is Fitness Test(BFT)–a.physica. fitness test comprising a.sprint test(11×10-m shuttle test),a.flexed-a.m ha.g test a.d a.1000-m run–a.e consistent with the output mea.ured during a.bicycle ergometer *** number of fa.se-positive a.d fa.senega.ive results with rega.d to the a.sessment of physica. fitness were a.so ***: a. pa.t of a.retrospective study,hea.th a.sessments from 323 reenlistment exa.ina.ions were eva.ua.ed rega.ding the output mea.ured during a.bicycle ergometer test a.d compa.ed with the BFT results of the ***: Overa.l,a.good correla.ion wa. shown between the bicycle ergometer test results a.d the results a.hieved in the BFT *** three disciplines of the BFT showed a.highly significa.t correla.ion with the rela.ive output a.hieved during the bicycle ergometer test(Pa.d a.so,the overa.l BFT score wa. highly significa.tly correla.ed(Pa.l ra.e of fa.se-positive a.d fa.se-nega.ive results wa. 4.0%.Conclusion: The BFT results mea.ured in the three physica. fitness test items were highly correla.ed with the output mea.ured during the bicycle ergometer *** ra.e of fa.se-positive a.d fa.se-nega.ive results wa. *** test items thus represent a. a.propria.e mea.urement instrument beca.se the test items require few equipment a.d less ***,a.la.ge number of subjects ca. be *** suggest tha. it would be more useful to a.sess the physica. fitness of this specia. group exclusively on the ba.is of the BFT instea. of using the bicycle ergometer test.

关键词： Physica. fitness Milita.y Ergometer test Bicycle Trea.mill

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Post-liver tra.spla.t bilia.y complica.ions:Current knowledge a.d thera.eutic a.va.ces

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World Journa. of Hepa.ology 2021年第1期13卷 66-79页

作者： irina Boeva.Petko Iva.ov Ka.a.yozov Iva. Tishkov Depa.tment of Interventiona. Ga.troenterology Acibadem City Clinic Tokuda HospitalSofia 1407Bulgaria Depa.tment of Interventiona. Ga.troenterology Clinic of GastroenterologyAcibadem City Clinic Tokuda HospitalSofia 1407Bulgaria

Liver tra.spla.ta.ion is the current sta.da.d of ca.e for end-sta.e liver disea.e a.d a. a.cepted thera.eutic option for a.ute liver fa.lure a.d prima.y liver *** the rema.ka.le a.va.ces in the surgica. techniques a.d immunosuppressive thera.y,the postopera.ive morbidity a.d morta.ity still rema.n high a.d the lea.ing ca.ses a.e bilia.y complica.ions,which a.fect up to one qua.ter of *** most common bilia.y complica.ions a.e a.a.tomotic a.d non-a.a.tomotic bilia.y strictures,lea.s,bile duct stones,sludge a.d *** the a.sence of a.recommended trea.ment a.gorithm ma.y options a.e a.a.la.le,such a. surgery,percuta.eous techniques a.d interventiona. *** the la.t few yea.s,endoscopic techniques ha.e widely repla.ed the more a.gressive percuta.eous a.d surgica. *** retrogra.e chola.giogra.hy is the preferred technique when duct-to-duct a.a.tomosis ha. been ***,new devices a.d techniques ha.e been developed a.d this ha. led to a.rema.ka.le increa.e in the success ra.e of minima.ly inva.ive *** the mecha.isms of bilia.y complica.ions helps in their ea.ly recognition which is the prerequisite for successful *** endoscopic thera.y is essentia. for the reduction of morbidity a.d morta.ity in these *** a.ticle focuses on the common post-tra.spla.t bilia.y complica.ions a.d the a.a.la.le interventiona. trea.ment moda.ities.

关键词： Post-tra.spla.t bilia.y complica.ions Endoscopic retrogra.e chola.giopa.crea.ogra.hy Chola.gioscopy Percuta.eous bilia.y interventions Liver tra.spla.ta.ion Living-donor liver tra.spla.ta.ion

Mesoporous fibrous silicon nitride by ca.a.ytic nitrida.ion of silicon

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Progress in Na.ura. Science:Ma.eria.s Interna.iona. 2019年第2期29卷 190-197页

作者： Ta.evik Mina.ya. Le Liu Ma.ina.a.ha.a. Miguel a.Rodriguez Sofiya.a.dinya. irina Hussa.nova Ta.linn University of Technology Functiona. a.va.ced Composite Technology Industries 3. Instituto de Cerámica.y Vidrio ICV-CSIC ITMO University Depa.tment of Mecha.ica. Science a.d Engineering University of Illinois at Urbana-Champaign

The ca.a.ytic effect of meta. oxide/a.umina.whiskers（CeO;, Mn;O;, NiO, Co;O;, Fe;O;, Cr;O;/a.） wa. eva.ua.ed on their a.ility to drive the nitrida.ion of silicon a.d to genera.e mesoporous fibrous silicon *** powder with different pa.ticles size a.ong with the ca.a.yst wa. nitridized a. 1300 °C for 5 h in nitrogen a.d nitrogen diluted with 10 vol% a.monia.a.mospheres. Nitrida.ion degree of silicon up to 99% wa. recorded using 1.5 wt% CeO;a.d Fe;O;ca.a.ysts in nitrogen-a.monia.a.mosphere. The ca.a.yzed sa.ples conta.n submicronic silicon nitride fibres with a.dia.eter of 400–500 nm a.d a.length of up to few micrometers. The compressive strength of 46 ± 1 MPa.wa. mea.ured for silicon sa.ples ca.a.yzed with nickel oxide/a.umina.whiskers a.d nitridized in N;/10 vol%NH;a.mosphere. Porous silicon nitride networks were produced with 45–52% porosity, pore sizes in the ra.ge of 370–1200 nm a.d media. pore in the ra.ge of 495–1655 nm.

关键词： Mesoporous substra.e Silicon nitride Na.ofibers Wet-combustion Ca.a.ytic nitrida.ion