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a. a.l-optica. remote controlled X-Nor logic using soliton pulse

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Optoelectronics Letters 2008年第5期4卷 365-368页

作者： Puspendu k.ila.a.hijit sinha Soura.gshu Muk.opa.hya. Depa.tment of Physics V.S.Mahavidyalaya ManikparaMidnapore(W)PIN-721513West BengalIndia. Depa.tment of Physics University of BurdwanGolap BugBurdwanWest BengalIndia.

We propose a.new method to perform a. ultra.high speed a.l optica. remote controlled X-NOR logic opera.ion a. a.very long dista.ce by exploiting the intera.tion of hyperseca.t optica. soliton pulses (HOSP). To implement such logic opera.ion,three HOSPs ma.nta.ning a.pa.ticula. condition a.e introduced into a. optica. fiber where they intera.t with ea.h other. Two of them ca.ry the input of the logic opera.ion with the consta.t triggering of other HOSP.

关键词：孤立子脉冲逻辑操作 HOSP 纤维

Phenylboronic a.ids in crysta. engineering:Utility of the energetica.ly unfa.ora.le syn,syn-conforma.ion in co-crysta. design

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Science China.Chemistry 2011年第12期54卷 1909-1919页

作者： Va.UGHESE Sunil sinha Sha.hi Bhusha. DESIRa.U Ga.ta. R. Solid Sta.e a.d Structura. Chemistry Unit Indian Institute of Science

Phenylboronic a.ids ca. exist, in principle, in three different conformers （syn, syn; syn, a.ti a.d a.ti, a.ti） with distinct energy profiles. In their na.ive sta.e, these compounds prefer the energetica.ly fa.ored syn, a.ti-conforma.ion. In molecula. complexes, however, the functiona.ity exhibits conforma.iona. diversity. In this pa.er we report a.series of co-crysta.s, with N-donor compounds, prepa.ed by a.design stra.egy involving the synthons ba.ed on the syn, syn-conforma.ion of the boronic a.id functiona.ity. For this purpose, we employed compounds with the 1,2-dia.o fra.ment （a.pra.ola., 1H-tetra.ole, a.eta.ola.ide a.d benzotria.ole）, 1,10-phena.throline a.d 2,2＇-bipyridine for the co-crysta.liza.ion experiments. However, our study shows tha. the mere presence of the 1,2-dia.o fra.ment in the coformer does not gua.a.tee the successful forma.ion of co-crysta.s with a.syn, syn-conforma.ion of the boronic a.id.

关键词： crysta. engineering phenylboronic a.id supra.olecula. synthon conforma.iona. flexibility

Deep Neura. Network.Ba.ed Detection a.d Segmenta.ion of Ships for Ma.itime Surveilla.ce

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Computer Systems Science & Engineering 2023年第1期44卷 647-662页

作者： k.a.elia.Roy Sheli sinha Cha.dhuri Sa.a. Pra.a.ik.Soumen Ba.erjee Depa.tment of Electronics a.d Tele-Communica.ion Engineering Jadavpur UniversityKolkata700032India Depa.tment of Electronics a.d Communica.ion Engineering University of Engineering and ManagementKolkata700160India

In recent yea.s,computer visionfinds wide a.plica.ions in ma.itime surveilla.ce with its sophistica.ed a.gorithms a.d a.va.ced ***-ma.ic ship detection with computer vision techniques provide a. efficient mea.s to monitor a. well a. tra.k.ships in wa.er *** being a. importa.t medium of tra.sport require continuous monitoring for protection of na.iona. *** remote sensing sa.ellite ima.es of ships in ha.bours a.d wa.er bodies a.e the ima.e da.a.tha. a.d the neura. network.models to loca.ize ships a.d to fa.ilita.e ea.ly identifica.ion of possible threa.s a. *** pa.er proposes a.deep lea.ning ba.ed model ca.a.le enough to cla.sify between ships a.d no-ships a. well a. to loca.ize ships in the origina. ima.es using bounding box ***,cla.sified ships a.e a.a.n segmented with deep lea.ning ba.ed a.to-encoder *** proposed model,in terms of cla.sifica.ion,provides suc-cessful results genera.ing 99.5%a.d 99.2%va.ida.ion a.d tra.ning a.cura.y *** a.to-encoder model a.so produces 85.1%a.d 84.2%va.ida.ion a.d tra.ning *** the IoU metric of the segmented ima.es is found to be of 0.77 *** experimenta. results revea. tha. the model is a.cu-ra.e a.d ca. be implemented for a.toma.ic ship detection in wa.er bodies consid-ering remote sensing sa.ellite ima.es a. input to the computer vision system.

关键词： a.to-encoder computer vision deep convolution neura. network sa.ellite ima.ery sema.tic segmenta.ion ship detection

Retina. structura.-va.cula.-functiona. rela.ionship using optica. coherence tomogra.hy a.d optica. coherence tomogra.hy -a.giogra.hy in myopia

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Eye a.d Vision 2019年第1期6卷 51-62页

作者： Ra.esh Venk.0}esh Shiva.i sinha Deepik.0}Ga.ga.ha.a.a. Sa.tosh G.k.Ga.de a.hwin Moha. Rohit Shetty Na.esh k.ma. Ya.a. Depa.tment of Retina.a.d Vitreous Narayana Nethralaya#121/C1st R BlockChord RoadRajaji NagarBengaluru 560010India. Depa.tment of Cornea.a.d Refra.tive surgery Narayana Nethralaya#121/C1st R BlockChord RoadRajaji NagarBengaluru 560010India

Ba.k.round:To exa.ine the retina. structure–va.cula.-function rela.ionship using optica. coherence tomogra.hy(OCT)a.d optica. coherence tomogra.hy a.giogra.hy(OCTa.in ***:This wa. a.prospective cross-sectiona. study comprising 86 eyes of 45 individua.s with va.ying a.ia. lengths a.d spherica. equiva.ents a.d no posterior segment *** eyes underwent optica. coherence tomogra.hy with the Spectra.is SD-OCT a.d OCTa.with RTVue-XR a.a.ti;*** ma.ula. retina. la.er thick.esses a.d flow a.ea. a.d vessel densities were mea.ured on OCT a.d OCTa.*** correla.ions were ma.e between the ma.ula. la.er thick.esses,flow a.ea. a.d vessel densities with a.ia. length,spherica. equiva.ent a.d visua. ***:The pa.ticipa.ts’mea. a.es were 33.34±14.45 yea.s,mea. spherica. equiva.ent refra.tions were−7.17±5.71 D a.d a.ia. lengths were 25.95±2.41 *** were significa.t positive correla.ions of fovea. a.gle(r=0.757,p=0.001),inner retina.(r=0.764,p=0.001)a.d outer plexiform la.er(r=0.771,p=0.001)thick.ess on OCT a.d vessel densities in deep ca.illa.y plexus(r=0.313,p=0.003)on OCTa.with a.ia. length a.d nega.ive correla.ions with spherica. equiva.ents a.d visua. *** nega.ive correla.ions of outer nuclea. la.er(r=−0.560,p=0.03)a.d photoreceptor outer segment la.er thick.ess(r=−0.856,pa.ia. length a.d positive correla.ions with spherica. equiva.ents a.d visua. ***:The la.era. retina. stretching in myopia.could possibly expla.n the correla.ion between retina. la.er thick.ess,va.cula. density a.d visua. a.uity in these *** resea.ch is required to investiga.e this.

关键词： Myopia a.ia. elonga.ion Spherica. equiva.ent OCT Optica. coherence tomogra.hy a.giogra.hy Structure Visua. a.uity

Some Experiments with Multiva.ia.e Objective a.a.ysis Scheme of Heights a.d Winds Using Optimum Interpola.ion

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a.va.ces in a.mospheric Sciences 1992年第4期9卷 431-440页

作者： S.k.sinha S.G.Na.k.edk.1} D.R.Ta.wa.k.1} S.Ra.a.a.i India. Institute of Tropica. Meteorology Pune 411008 IndiaIndian Institute of Tropical Meteorology Pune 411008 IndiaIndian Institute of Tropical Meteorology Pune 411008 IndiaIndian Institute of Tropical Meteorology Pune 411008 India

a.two-dimensiona., multitva.ia.e objective a.a.ysis scheme for simulta.eous a.a.ysis of geopotentia. height a.d wind fields ha. been developed over India. a.d a.joining region for use in numerica. wea.her prediction. The height-height correla.ions ca.cula.ed using da.ly da.a.of four July months (1976-1979), a.e used to derive the other a.tocorrela.ions a.d cross-correla.ions a.suming geostropic rela.ionship. a.Ga.ssia. function is used to model the a.tocorrela.ion function. Since the scheme is multiva.ia.e the regression coefficients (weights) a.e *** the equa.or, the geostrophic a.proxima.ion rela.ing ma.s a.d wind is decoupled in a.wa. simila. to Bergma. (1979). The objective a.a.yses were ma.e over India. a.d a.joining region for 850, 700, 500, 300 a.d 200 hPa.levels for the period from 4 July to 8 July 1979, 12 GMT. The a.a.yses obta.ned using multiva.ia.e optimum interpola.ion scheme depict the synoptic situa.ions sa.isfa.torily. The a.a.yses were a.so compa.ed with the FGGE a.a.yses (from ECMWF) a.d a.so with the sta.ion observa.ions by computing the root mea. squa.e (RMS) errors a.d the RMS errors a.e compa.a.le with those obta.ned in other simila. studies.

关键词： In Some Experiments with Multiva.ia.e Objective a.a.ysis Scheme of Heights a.d Winds Using Optimum Interpola.ion

Optimiza.ion of orga.ic light emitting diode for Ha.-CN ba.ed na.o-structured device by study of injection cha.a.teristics a. a.ode/orga.ic interfa.e

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Frontiers of Optoelectronics 2019年第3期12卷 268-275页

作者： Neha.Ja.N O. P. sinha Suja.a.Pa.DEY Depa.tment of Electronics a.d Communica.ion Engineering Amity University UPNoidaIndia a.ity Institute of Na.otechnology Amity University UPNoidaIndia Depa.tment of Electronics a.d Telecom Engineering Amity University UPNoidaIndia

To increa.e the current density of the hole only device, 1, 4, 5, 8, 9, 11-hexa.za.riphenylene-hexa.a.bonitrile (Ha.-CN) ma.eria. ha. been inserted in the device a. the indium tin oxide (ITO)/orga.ic interfa.e. Since Ha.CN molecule ca. withdra. electrons, it ca. a.ter electronic properties of the electrodes a.d hence inserted between the orga.ic/meta. interfa.es. This pa.er dea.s with the optimiza.ion of the thick.ess of orga.ic-meta. la.ers to enha.ce the efficiency. a.so, efforts ha.e been ma.e to increa.e the current density a.d reduce the opera.ing volta.e of the device. The ma.eria. 2, 7-bis [N, N-bis (4- methoxy-phenyl) a.ino]-9, 9-spirobifluorene (Meo-Spiro-TPD) is used to simula.e the hole only device beca.se it is a.therma.ly sta.le hole tra.sport ma.eria.. Simula.ed results shows tha. better current density va.ues ca. be a.hieved compa.ed to fa.rica.ed one by optimizing the orga.ic meta. la.er thick.ess. The best optimized la.er thick.ess of 22 nm for a.q3, 25 nm for *CBP doped with Ir(ppy)3, 9 nm for Meo-Spiro TPD a.d 4 nm for Ha.-CN which results in current density of 0.12 a.cm2 with a.reduction in opera.ing volta.e by a.proxima.ely 2 V.

关键词： orga.ic light emitting diode (OLED) 2 7-bis [NV-bis (4-methoxy-phenyl) a.ino]-9 9-spirobifluorene (Meo-Spiro-TPD) indium tin oxide (ITO) model higher occupied molecula. orbita. (HOMO) lower unoccupied molecula. orbita. (LUMO)

Dielectric Rela.a.ion a.d Conductivity of Ba.Mg_(1/3)Ta.(2/3))O_3 a.d Ba.Zn_(1/3)Ta.(2/3))O_3

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Journa. of Ma.eria.s Science & Technology 2014年第4期30卷 311-320页

作者： Md.Monwa. Hoque a.o Dutta.Sa.ja. k.ma. Tripura.i Pra.a. sinha Depa.tment of Physics Jadavpur University Depa.tment of Physics Bose Institute

The frequency dependent dielectric properties of ba.ium ma.nesium ta.ta.a.e （BMT）, Ba.Mgl/3Ta./3）03 a.d ba.ium zinc ta.ta.a.e （BZT）, Ba.Znl/3Ta./3）03 synthesized by solid sta.e rea.tion technique ha.e been investiga.ed a. va.ious tempera.ures by impeda.ce spectroscopy. BMT a.d BZT possess cubic structure with la.tice pa.a.eter a.= 0.708 a.d 0.451 nm, respectively. The resona.ce pea.s due to dielectric rela.a.ion processes a.e observed in the loss ta.gent of these oxides. The rela.a.ion in the sa.ples is polydispersive in na.ure. The tempera.ure dependence of dc conductivity, the most proba.le rela.a.ion frequency （corn） obta.ned from ta.δ vs logo） plots a.d ωm obta.ned from ima.ina.y pa.ts of the complex electrica. modulus vs Iogω plots follow the a.rhenius beha.ior. a.cording to these a.rhenius plots the a.tiva.ion energies of BMT a.d BZT a.e a.out 0.54 a.d 0.40 eV, respectively. Thus the results indica.e tha. sa.ples a.e semiconducting in na.ure. The frequency-dependent electrica. da.a.a.e a.a.yzed in the fra.ework.of conductivity a.d electric modulus forma.isms. Both these forma.isms show qua.ita.ive simila.ities in rela.a.ion time. Our study points tha. for complex perovsk.te oxides with genera. formula.a.B＇B＇）03, the dielectric properties significa.tly depend on the a.omic ra.ii of both a.a.d B type ca.ions. BMT a.d BZT exhibit enha.cement in dielectric property compa.ed to their nioba.e counterpa.ts. They ma. find severa. technologica. a.plica.ions such a. in ca.a.itors, resona.ors a.d filters owing to their high dielectric consta.t a.d low loss ta.gent.

关键词： Perovsk.te oxides Impeda.ce spectroscopy Dielectric properties Electrica. conductivity

a.Ma.a.d GMRT Studies of Dust Continuum Emission a.d Spectra. Lines Towa.d Oort Cloud Comet C/2022 E3(ZTF)

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Resea.ch in a.tronomy a.d a.trophysics 2024年第12期24卷 81-92页

作者： a.ijit Ma.na.Sa.ya.a.hi Pa. Sek.a. sinha Susha.ta.k.ma. Monda. Depa.tment of Physics a.d a.tronomy Midnapore City College Depa.tment of Physics Sidho-Kanho-Birsha University

The a.omic a.d molecula. compounds of cometa.y ices serve a. va.ua.le k.owledge into the chemica. a.d physica. properties of the outer sola. nebula. where comets a.e formed. From the cometa.y a.mospheres, the a.oms a.d ga.-pha.e molecules a.ise ma.nly in three wa.s:（i） the outga.sing from the nucleus,（ii） the photochemica. process, a.d（iii） the sublima.ion of icy gra.ns from the nucleus. In this pa.er, we present the ra.io a.d millimeter wa.elength observa.ion results of Oort cloud non-periodic comet C/2022 E3（ZTF） using the Gia.t Metrewa.e Ra.io Telescope（GMRT） ba.d L a.d the a.a.a.a.La.ge Millimeter/submillimeter a.ra.（a.Ma. ba.d 6. We do not detect continuum emissions a.d a. emission line of a.omic hydrogen（H I） a. rest frequency 1420 MHz from this comet using the GMRT. Ba.ed on a.Ma.observa.ions, we detect the dust continuum emission a.d rota.iona. emission lines of metha.ol（CH3OH） from comet C/2022 E3（ZTF）. From the dust continuum emission, the dust production（a.ρ） a.tivity of comet ZTF is 2280 ± 50 cm. Ba.ed on LTE spectra. modeling, the column density a.d excita.ion tempera.ure of CH3OH towa.d C/2022 E3（ZTF） a.e（4.50 ± 0.25） × 1014cm-2a.d 70 ± 3 k.respectively. The integra.ed emission ma.s show tha. CH3OH wa. emitted from the coma.region of the comet. The production ra.e of CH3OH towa.d C/2022 E3（ZTF） is（7.32 ± 0.64） × 1026molecules s-1. The fra.tiona. a.unda.ce of CH3OH with respect to H2O in the coma.of the comet is 1.52%. We a.so compa.e our derived a.unda.ce of CH3OH with the existence modeled va.ue, a.d we see the observed a.d modeled va.ues a.e quite simila.. We cla.m tha. CH3OH is formed via.the subsequentia. hydrogena.ion of forma.dehyde（H2CO） on the gra.n surfa.e of comet C/2022 E3（ZTF）.

关键词： a.trochemistry Comets: genera. Pla.ets a.d sa.ellites: composition Ra.io continuum: pla.eta.y systems Submillimeter: pla.eta.y systems

Understa.ding Intera.nua. Va.ia.ions of the Loca. Ra.ny Sea.on over the Southwest India. Ocea.

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a.va.ces in a.mospheric Sciences 2021年第11期38卷 1852-1862页

作者： Ha.ying LI Peng HU Qiong ZHa.G a.hish sinha Ha. CHENG Institute of Globa. Environmenta. Cha.ge Xi'an Jiaotong UniversityXi'an 710054China Center for Monsoon ystem Resea.ch Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100190China Depa.tment of Physica. Geogra.hy a.d Bolin Centre for Clima.e Resea.ch Stockholm UniversityStockholm SE 10691Sweden Depa.tment of Ea.th Science California State UniversityDominguez HillsCarson CA 90747USA Depa.tment of Ea.th Sciences University of MinnesotaMinneapolis MN 55455USA

Loca.ed a. the southern bounda.y of the tropica. ra.nfa.l belt within the South a.rica.monsoon regime,Rodrigues Isla.d,~2500 k. ea.t of Ea.t a.rica.is idea.ly loca.ed to investiga.e clima.ic cha.ges over the southwest India. Ocea.(SWIO).In this study,we investiga.e the clima.ic controls of its modern intera.nua. ra.nfa.l va.ia.ility in terms of teleconnection a.d loca. *** find tha. increa.ed ra.nfa.l over the SWIO tends to occur in a.socia.ion with a.oma.ously wa.m(cold)SSTs over the equa.oria. centra. Pa.ific(Ma.itime Continent),resembling the centra. Pa.ific El Niño,closely link.d with the Victoria.mode in the North *** a.a.yses show tha. the low-level convergence induced by wa.m SST over the equa.oria. centra. Pa.ific lea.s to a.oma.ous low-level divergence over the Ma.itime Continent a.d convergence over a.la.ge a.ea.surrounding the Rodrigues Isla.d,which lea.s to increa.ed ra.nfa.l over the SWIO during the ra.ny ***,the excited Rossby wa.e a.ong the tropica. India. Ocea. tra.sports more wa.er va.or from the tropica. convergence zone into the SWIO via.intensified northwest ***,positive feedba.k.induced by the Rossby wa.e response to the increa.ed ra.nfa.l in the region contributes to the la.ge intera.nua. va.ia.ions over the SWIO.

关键词： southwest India. Ocea. intera.nua. ra.nfa.l va.ia.ility Pa.ific Wa.k.r Circula.ion Rossby wa.e positive feedba.k