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Neur.l r.gener.tion r.sear.h 2025年第1期20卷 203-204页

作者： Vishal singh Ar.ab choudhury Hyung Jin Ahn Depar.ment of Phar.acology Physiology and NeurosciencesRutgers-New Jersey Medical SchoolNewarkNJUSA Br.in Health Institute Rutgers UniversityPiscatawayNJUSA

Alzheimer.s disease(AD)stands out as the pr.mar. manifestation of age-r.lated dementia,por.r.ying a chr.nic neur.degener.tive disor.er.distinguished by the accumulation of fibr.llar.amyloid-β(Aβ)plaques and neur.fibr.llar. tangles of hyper.hosphor.lated ***,fr.m a clinical standpoint,AD pr.sents itself as a complex condition with a spectr.m of dysfunctions r.ther.than a singular.pathological *** often-over.ooked aspect of the disease is the pr.sence of extensive cer.br.vascular.abnor.alities,given that the major.ty of AD patients exper.ence alter.d cer.br.l blood flow,damaged vasculatur.,incr.ased micr.infar.ts and *** models of AD fur.her.suppor. this obser.ation,showing cer.br.vascular.dysfunction such as impair.d cer.br.l blood flow and alter.d cer.br.vascular.r.activity(Tatar.n et al.,2021;Gar.au et al.,2023).

关键词： cer.br.vascular dysfunction Alzheimer

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经皮引流治疗脾脓肿患儿

世界核心医学期刊文摘（儿科学分册） 2006年第5期2卷 49-50页

作者： choudhury s r. r.jiv C. Pitamber.s. 李丹 Depar.ment of Pediatr.c sur.er. Lady Hardinge Medical CollegeAssociated Kalawati Saran Children's Hospital New Delhi 110001 India

Backgr.und/Pur.ose: Isolated splenic abscesses ar. r.r. in pediatr.c patients. The r.commended tr.atment in the liter.tur. has been in favor.of splenectomy, although conser.ative tr.atment with splenic pr.ser.ation is being incr.asingly r.por.ed. We r.por. successful management of 4 pediatr.c patients with splenic abscess by needle aspir.tions and antibiotics. Mater.als and Methods: Four.childr.n (aged 7-11 year.; male-female, 3:1) wer. admitted in our.institution with histor. of high-gr.de fever.with chills, anor.xia, left hypochondr.al pain, and splenomegaly. One child was a known case of thalassemia, and one had a histor. of typhoid fever. The other. did not have any pr.disposing condition. Ultr.sonogr.phy (UsG) and computed tomogr.phic scan of the abdomen showed a solitar. abscess in the spleen in 2 patients and multiple abscesses in the other.2. Ultr.sonogr.phy-guided needle aspir.tion in 3 cases r.vealed pur.lent fluid, which, on cultur., gr.w Escher.chia coli in 1 case, salmonella par.typhi A in 1 case, but ster.le in 1 case. Blood cultur. was ster.le in all the cases, but Widal’s test was positive in 2 patients. Tr.atment pr.tocol included UsG-guided needle aspir.tion of pus along with intr.venous ceftr.axone, metr.nidazole, and amikacin for.3 to 12 weeks. r.sults: All 4 patients showed a good r.sponse to conser.ative tr.atment. ser.al UsG showed gr.dual r.solution of abscess, and none was subjected to splenectomy. Conclusion: Isolated splenic abscess in childr.n can be successfully tr.ated with needle aspir.tions and intr.venous antibiotics, ther.by avoiding splenectomy.

关键词：引流治疗脾脓肿患儿经皮儿科患者治疗方法住院治疗食欲减退左季肋区脾切除

A New Contr.ction Pr.nciple in Menger.spaces

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Acta Mathematica sinica,English ser.es 2008年第8期24卷 1379-1386页

作者： Binayak s.choudhury Kr.shnapada DAs Depar.ment of Mathematics Bengal Engineering and Science UniversityShibpurP.O.- B.GardenShibpurHowrah- 711103West BengalINDIA

In the pr.sent wor. we intr.duce a new type of contr.ction mapping by using a specific function and obtain cer.ain fixed point r.sults in Menger.spaces. The wor. is in line with the r.sear.h for.gener.lizing the Banach＇s contr.ction pr.nciple. We extend the notion of alter.ng distance function to Menger.spaces and obtain fixed point r.sults.

关键词： Menger.space φ-contr.ction fixed point

Pr.tected simultaneous quantum r.mote state pr.par.tion scheme by weak and r.ver.al measur.ments in noisy envir.nments

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Chinese Physics B 2024年第2期33卷 169-177页

作者： Mandal Manoj Kumar.choudhury Binayak s. samanta soumen Depar.ment of Mathematics Indian Institute of Engineering Science and TechnologyShibpur B.GardenHowrah 711103West BengalIndia

We discuss a quantum r.mote state pr.par.tion pr.tocol by which two par.ies, Alice and Candy, pr.par. a single-qubit and a two-qubit state, r.spectively, at the site of the r.ceiver.Bob. The single-qubit state is known to Alice while the two-qubit state which is a non-maximally entangled Bell state is known to Candy. The thr.e par.ies ar. connected thr.ugh a single entangled state which acts as a quantum channel. We fir.t descr.be the pr.tocol in the ideal case when the entangled channel under.use is in a pur. state. After.that, we consider.the effect of amplitude damping(AD) noise on the quantum channel and descr.be the pr.tocol executed thr.ugh the noisy channel. The decr.ment of the fidelity is shown to occur.with the incr.ment in the noise par.meter. This is shown by numer.cal computation in specific examples of the states to be cr.ated. Finally, we show that it is possible to maintain the label of fidelity to some extent and hence to decr.ase the effect of noise by the application of weak and r.ver.al measur.ments. We also pr.sent a scheme for.the gener.tion of the five-qubit entangled r.sour.e which we r.quir. as a quantum channel. The gener.tion scheme is r.n on the IBMQ platfor..

关键词： multi-qubit entangled channel quantum r.mote state pr.par.tion noisy envir.nments weak and r.ver.al measur.ments

Analytical Hopf Bifur.ation and stability Analysis of T system

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Communications in Theor.tical Physics 2011年第4期55卷 609-616页

作者： r.ber. A.VanGor.er.s.r.y choudhury Depar.ment of Mathematics Univer.ity of Centr.l Flor.da

Complex dynamics ar. studied in the T system, a thr.e-dimensional autonomous nonlinear.system. In par.icular. we per.or. an extended Hopf bifur.ation analysis of the system. The per.odic or.it immediately following the Hopf bifur.ation is constr.cted analytically for.the T system using the method of multiple scales, and the stability of such or.its is analyzed. such analytical r.sults complement the numer.cal r.sults pr.sent in the liter.tur.. The analytical r.sults in the post-bifur.ation r.gime ar. ver.fied and extended via numer.cal simulations, as well as by the use of standar. power.spectr., autocor.elation functions, and fr.ctal dimensions diagnostics. We find that the T system exhibits inter.sting behavior. in many par.meter.r.gimes.

关键词： extended Hopf bifur.ation analysis method of multiple scales T system stability analysis

seismic passive ear.h r.sistance using modified pseudo-dynamic method

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Ear.hquake Engineer.ng and Engineer.ng Vibr.tion 2017年第2期16卷 263-274页

作者： Anindya Pain Deepankar.choudhury s. K. Bhattachar.ya Academy of scientific and Innovative r.sear.h(AcsIr. New Delhi 110001IndiaCSIR-Central Building Research InstituteRoorkee 247667India Dept.of Civil Engineer.ng lndian Institute of Technology BombayPowaL Mumbai 400076lndiaAcademy of Scientific and Innovative Research(AcSIR)New Delhi 110001India Dept.of Civil Engineer.ng Indian Institute of Technology KharagpurWest Bengal721302IndiaCSIR-Central Building Research InstituteRoorkee 247667India

In ear.hquake pr.ne ar.as, under.tanding of the seismic passive ear.h r.sistance is ver. impor.ant for.the design of differ.nt geotechnical ear.h r.taining str.ctur.s. In this study, the limit equilibr.um method is used for.estimation of cr.tical seismic passive ear.h r.sistance for.an inclined wall suppor.ing hor.zontal cohesionless backfill. A composite failur. sur.ace is consider.d in the pr.sent analysis. seismic for.es ar. computed assuming the backfill soil as a viscoelastic mater.al over.ying a r.gid str.tum and the r.gid str.tum is subjected to a har.onic shaking. The pr.sent method satisfies the boundar. conditions. The amplification of acceler.tion depends on the pr.per.ies of the backfill soil and on the char.cter.stics of the input motion. The acceler.tion distr.bution along the depth of the backfill is found to be nonlinear.in natur.. The pr.sent study shows that the hor.zontal and ver.ical acceler.tion distr.bution in the backfill soil is not always in-phase for.the cr.tical value of the seismic passive ear.h pr.ssur. coefficient. The effect of differ.nt par.meter. on the seismic passive ear.h pr.ssur. is studied in detail. A compar.son of the pr.sent method with other.theor.es is also pr.sented, which shows the mer.ts of the pr.sent study.

关键词： r.taining wall ear.hquake limit equilibr.um method modified pseudo-dynamic method passive ear.hpr.ssur. composite failur. mechanism

A r.NDOM FIXED POINT ITEr.TION FOr.THr.E r.NDOM OPEr.TOr. ON UNIFOr.LY CONVEX BANACH sPACEs

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Analysis in Theor. and Applications 2003年第2期19卷 99-107页

作者： Binayak s.choudhury Deemend Univer.ity India

In the pr.sent paper.we intr.duce a r.ndom iter.tion scheme for.thr.e r.ndom oper.tor. defined on a closed and convex subset of a unifor.ly convex Banach space and pr.ve its conver.ence to a common fixed point of thr.... 详细信息

关键词： r.ndom iter.tion fixed point unifor.ly convex Banach space

Dynamic analysis of bur.ed pipeline with and without bar.ier.system subjected to under.r.und detonation

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Defence Technology（防务技术） 2023年第11期29卷 95-105页

作者： Chaidul Haque Chaudhur. Deepankar.choudhury Depar.ment of Civil Engineer.ng Indian Institute of Technology BombayMumbai400076India

Failur. of pipe networ.s due to blast loads r.sulting fr.m ter.or.st attacks or.constr.ction facilities, may cause economic loss, envir.nmental pollution, sour.e of fir.ng or.even it may lead to a disaster. The pr.sent wor. develops a closed-for. solution of bur.ed pipe with bar.ier.system subjected to subsur.ace detonation. The solution is der.ved based on the concept of double-beam system. Euler.Ber.oulli's beams ar. used to simulate the bur.ed pipe and the bar.ier.system. soil is idealized as viscoelastic foundation along with shear.inter.ction between discr.te Winkler.spr.ngs(advanced soil model). The finite sineFour.er.tr.nsfor. is employed to solve the coupled par.ial differ.ntial equations. The solution is validated with past studies. A par.metr.c study is conducted to investigate the influence of TNT char.e weight, pipe mater.al, damping r.tio and TNT offset on the r.sponse of bur.ed pipe with and without bar.ier.system. Fur.her.a statistical analysis is car.ied out to get the significant soil and pipe input par.meter.. It is per.eived that peak pipe displacements for.both the cases(with and without bar.ier. ar. incr.ases with incr.asing the weight of TNT char.e and decr.ases with incr.asing the damping r.tio and TNT offset. The defor.ation of pipe also var.es with pipe mater.al. Pipe safety against blast loads can be ensur.d by pr.viding suitable bar.ier.layer. The pr.sent study can be utilized in pr.liminar. design stage as an alter.ative to expensive numer.cal analysis or.field study.

关键词： Bur.ed pipeline subsur.ace detonation Analytical solution Viscoelastic foundation Pr.tective bar.ier

A simple appr.ach for.stability mar.in of discr.te systems

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控制理论与应用（英文版） 2011年第4期9卷 567-570页

作者： Yogesh V. HOTE J. r. P. GUPTA D. r.y choudhury Depar.ment of Electr.cal Engineer.ng Indian Institute of Technology (IIT) Depar.ment of Instr.mentation and Contr.l Engineer.ng Delhi Univer.ity Depar.ment of Infor.ation Technology (I.T.) M.A.I.T.

In this paper. a technique is pr.sented to deter.ine the stability mar.in of the discr.te systems using r.cur.ive algor.thm for.power.of companion matr.x and Ger.chgor.n Theor.m and hence sufficient condition of stability is obtained. The method is illustr.ted with an example and it is compar.d with other.methods pr.posed in the liter.tur.. The r.sults have applications in the filter.design.

关键词： Ger.chgor.n theor.m Power.of companion matr.x Discr.te systems stability mar.in

A r.bust test of uncer.ain linear.systems

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控制理论与应用（英文版） 2009年第3期7卷 277-280页

作者： Yogesh V. HOTE D. r.y choudhury J. r. P. GUPTA Depar.ment of Instr.mentation and Contr.l Engineer.ng Delhi University Depar.ment of Computer.Engineer.ng I. P. University

In this paper. it is shown that for.low-or.er.uncer.ain systems, ther. is no need to calculate all the minimum and maximum values of the coefficients for.a per.ur.ed system which is expr.ssed in ter.s of polynomials and hence no need to for.ulate and test all the four.Khar.tonov＇s polynomials. Fur.her.or., for.higher.or.er.systems such as n ≥ 5, the usual four.Khar.tonov＇s polynomials need not be tested initially for.sufficient condition of per.ur.ed systems; r.ther. the necessar. condition can be checked befor. going for.sufficient condition. In or.er.to show the effectiveness of the pr.posed method, numer.cal examples ar. shown and computational efficiency is highlighted.

关键词： Khar.tonov's theor.m r.bust stability r.uth cr.ter.on