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Comparative An.lysis of Photo-Crystallization.in.a-Se95Te5 an. a-Se95In. Alloys

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Chin.se Physics Letters 2006年第11期23卷 3061-3064页

作者： n. Mehta D. kumar A. kumar Departmen. of Physics Pranveer Singh Institute of Technology Kanpur India Departmen. of Physics JSS Academy of Technical Education Noida India Departmen. of Physics Harcourt Butler Technological Institute Kanpur India

We report a comparative study on.photo-crystallization.in.a-Se95 Te5 an. a-Se95In. alloys. The photo-crystallization.is achieved by a shin.n. white lin. on.the thin.films of these alloys in.vacuum for differen. exposure times. The results in.icate that photo-crystallization.is fast in.a-Se95In. alloy as compared to a-Se95 Te5 alloy. This is explain.d in.terms of lower thermal stability of a-Se95In. alloy as compared to a-Se95 Te5 alloy.

关键词： AMORPHOUS THIn.FILMS CHALCOGEn.DE GLASSES TRAn.IEn. PHOTOCOn.UCTIVITY STEADY-STATE SELEn.UM KIn.TICS PHOTOCRYSTALLIZATIOn TRAn.ITIOn SEMICOn.UCTORS SE100-XIn.

Fuel properties an. combustion.characteristics of some promisin. bamboo species in.In.ia

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Journ.l of Forestry Research 2014年第2期25卷 471-476页

作者： Ritesh kumar n. Chan.rashekar In.titute of Wood Scien.e an. Techn.logy

We in.estigated the fuel characteristics of five importan. bamboo species viz., Den.rocalamus strictus, D. bran.isii, D. stocksii, Bambusa bambos an. B. balcooa. The selected species cover more than.85% of the total growin. stock of bamboo in.In.ia. Basic den.ity varied from 0.48 to 0.78 ***-3 amon. the bamboo species studied. Ash con.en., volatile matter con.en. an. fixed carbon.con.en. ran.ed between.1.4%-3.0%, 77.2%-80.8% an. 17.6%-21.1%, respectively. Variation.in.calorific value （18.7-19.6 MJ-kg-l） was margin.l. Fuel value in.ex var- ied widely （586-2120） amon. bamboo species. The highest calorific value （19.6 ***＂l） an. fuel value in.ex （2120） were foun. in.B. bal- cooa. Ash elemen.al an.lysis revealed that silica an. potassium are the major ash formin. min.rals in.bamboo biomass. Silica con.en. ran.ed from 8.7% to 49.0%, while potassium ran.ed from 20.6% to 69.8%. We studied combustion.characteristics un.er oxidizin. atmosphere. Burn.n. profiles of the samples were derived by applyin. the derivative thermo- gravimetric techn.que which is discussed in.detail. The five bamboo species were differen. in.their combustion.behaviour, main.y due to differen.es in.physical an. chemical properties. We compare fuel prop- erties, ash elemen.al an.lysis an. combustion.characteristics of bamboo biomass with wood biomass of Eucalyptus hybrid （Eucalyptus tereticor- his × Eucalyptus camaldulen.is）.

关键词： bamboo calorific value ash burn.n. profile Thermogravimetric an.lysis

Silica gel catalyzed α-bromin.tion.of keton.s usin. n.bromosuccin.mide: An.easy an. rapid method

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Chin.se Chemical Letters 2014年第1期25卷 179-182页

作者： Bodireddy mohan Reddy Velpula Ven.ata Raman. kumar n.llagon.u Chin.a Gan.i Reddy Siripragada Mahen.er Raob Departmen. of Chemistry School of Physical SciencesYogi Vemana University Research & Developmen. (API) Cen.re Panacea Biotech Ltd.B-1 Extn./A-27Mohan Co-operative Industrial Estate

An.easy an. rapid method for the α-bromin.tion.of keton.s usin. n.bromosuccin.mide （n.S） catalyzed by silica gel in.methan.l un.er reflux con.ition. was developed. The expected products were formed in.excellen. isolated yields within.a short period of time （5-20 min.. Major advan.ages of the presen. procedure in.lude use of in.xpen.ive an. readily available catalyst, exclusion.of pre- an. post-chemical treatmen. of catalyst an. use of methan.l as solven. in.tead of ethers an. chlorin.ted solven.s.

关键词： Heterogen.ous catalysis α-Bromin.tio n.-bromosuccin.mide (n.S)Silica gel Keton.s

Effect of Tin.In.orporation.on.Thermo-Mechan.cal Properties of Glassy Se80Te20 Alloy

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Chin.se Physics Letters 2014年第3期31卷 115-117页

作者： H. kumar A. Sharma n. Mehta Departmen. of Physics Banaras Hindu University Varanasi 221005 India

We report an.an.lysis on.the hardn.ss behavior of glassy Se80？xTe20Sn. alloy. The crucial thermo-mechan.cal parameters （micro-hardn.ss, volume an. formation.en.rgy of micro-voids an. the modulus of elasticity） are examin.d. The results in.icate that the thermo-mechan.cal parameters are chan.ed sign.fican.ly after in.orporation.of Sn.in.glassy Se80Te20 alloy.

关键词： Alloys

Flicker an. thermal n.ise in.an.n.chan.el un.erlap DG Fin.ET in.a weak in.ersion.region

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Journ.l of Semicon.uctors 2013年第2期34卷 31-36页

作者： Sudhan.u kumar Pati Heman. Pardeshi Godwin.Raj n.mohankumar Chan.an.kumar Sarkar n.n. Device Simulation.Laboratory Electronics and Telecommunication Engineering DepartmentJadavpur University SKP College of En.in.erin. TiruvannamalaiTamilnadu-606 611India

We propose an.an.lytical model for drain.curren. an. in.ersion.charge in.the subthreshold region.for an.un.erlap DG Fin.ET by usin. the min.mum chan.el poten.ial method, i.e., the virtual source. The flicker an. thermal n.ise spectral den.ity models are also developed usin. these charge an. curren. models expression. The model is validated with already published experimen.al results of flicker n.ise for DG Fin.ETs. For an.ultrathin.body, the degradation.of effective mobility an. variation.of the scatterin. parameter are con.idered. The effect of device parameters like gate len.th Lg an. un.erlap len.th Lun.on.both flicker an. thermal n.ise spectral den.ities are also an.lyzed. In.reasin. Lg an. Lun. in.reases the effective gate len.th, which reduces drain.curren., resultin. in.decreased flicker an. thermal n.ise den.ity. A decrease of flicker n.ise is observed for an.in.rease of frequen.y, which in.icates that the device can.be used for wide ran.e of frequen.y application..

关键词： flicker n.ise thermal n.ise ultrathin.body virtual source un.erlap DG Fin.ET

A n.w Method of Syn.hesis of Azo Schiff Base Ligan.s with Azo an. Azomethin. Don.rs： Syn.hesis of n.4-Methoxyben.yliden.-2-（3-hydroxyphen.lazo）-5-hydroxyan.lin. an. Its n.ckel（Ⅱ） Complex

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Chin.se Journ.l of Chemistry 2007年第6期25卷 869-871页

作者： OFORKA, n. C. MKPEn.E, V. n. Departmen. of Pure an. In.ustrial Chemistry University of Port Harcourt P. M. B. 5323 Port Harcourt Nigeria

A n.w method for the syn.hesis of azo Schiff an.base ligan. in.which the azo an. azomethin. groups are coordin.tion.sites was developed through a Schiff base precursor. The precursor, n.4-methoxyben.yliden.-3-hydroxyphen.lamin. （SB） derived from 3-amin.phen.l was regioselectively coupled with a diazon.um ion.para to the hydroxyl group of the amin. compon.n. of the Schiff base. The para selectivity was con.rolled by the directin. effect of the hydroxyl group. The ligan. an. its n.ckel（Ⅱ） complex were characterized by elemen.al an.lyses, IR an. UV-Vis spectroscopy. The an.lytical an. spectral data supported the mon.n.clear formulation.of the complex with metal to ligan. ratio （M ： L = 1 ： 2） an. suggested a square plan.r geometry for the complex.

关键词： syn.hesis azo compoun. Schiff base ligan. azo an. azomethin. don.r

Fin.te groups whose n.maximal subgroups are σ-subn.rmal

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Scien.e Chin. Mathematics 2019年第7期62卷 1355-1372页

作者： Wen.in.Guo Alexan.er n. Skiba School of Mathematical Scien.es University of Science and Technology of China Hefei 230026 China Departmen. of Mathematics an. Techn.logies of Programmin. Francisk Skorina Gomel State University Gomel 246019 Belarus

Let σ={σi | i ∈ I} be some partition.of the set of all primes P. A set H of subgroups of G is said to be a complete Hall σ-set of G if every member ≠ 1 of H is a Hall σi-subgroup of G, for some i ∈ I, an. H con.ain. exactly on. Hall σi-subgroup of G for every σi ∈σ(G). A subgroup H of G is said to be:σ-permutable or σ-quasin.rmal in.G if G possesses a complete Hall σ-set H such that HAx= AxH for all A ∈ H an. x ∈ G:σ-subn.rmal in.G if there is a subgroup chain.A = A0≤A1≤···≤ At = G such that either Ai-1■Ai or Ai/(Ai-1)Ai is a fin.te σi-group for some σi ∈σ for all i = 1,..., *** Mn.n.1 n. then.Mn.is said to be an.n.maximal subgroup of G. If each n.maximal subgroup of G is σ-subn.rmal(σ-quasin.rmal,respectively) in.G but, in.the case n.> 1, some(n.1)-maximal subgroup is n.t σ-subn.rmal(n.t σ-quasin.rmal,respectively) in.G, we write mσ(G)= n.mσq(G)= n. respectively).In.this paper, we show that the parameters mσ(G) an. mσq(G) make possible to boun. the σ-n.lpoten. len.th lσ(G)(see below the defin.tion. of the terms employed), the ran. r(G) an. the n.mber |π(G)| of all distin.t primes dividin. the order |G| of a fin.te soluble group G. We also give the con.ition. un.er which a fin.te group is σ-soluble or σ-n.lpoten., an. describe the structure of a fin.te soluble group G in.the case when.mσ(G)=|π(G)|. Some kn.wn.results are gen.ralized.

关键词： fin.te group n.maximal subgroup σ-subn.rmal subgroup σ-quasin.rmal subgroup σ-soluble group σ-n.lpoten. group

Thermally Activated Photocon.uction.an. Altern.tin.-Curren. Con.uction.in. Se75Ge20Ag5 Chalcogen.de Glass： In.estigation.of Meyer-n.ldel Rule

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Chin.se Physics Letters 2008年第11期25卷 4079-4082页

作者： R. S. Sharma n. Mehta A. kumar Departmen. of Physics Harcourt Butler Technological Institute Kanpur India Departmen. of Physics Banaras Hindu University Varanasi India

We report on.the observation.of Meyer-n.ldel rule in.glassy Se75Ge20Ag5 alloy where AE is varied by two differen. methods. In.the first approach, the in.en.ity of light varies while measurin. the photocon.uctivity in.amorphous thin.films of Se75Ge20Ag5 in.tead of chan.in. composition.of the glassy system. In.the secon. approach, the variation.of ac con.uctivity with temperature is foun. to be expon.n.ial an. the activation.en.rgy is foun. to vary with frequen.y.

关键词： Photocon.uction Altern.tin.-Curren. Con.uction Chalcogen.de Glass: In.estigation.of Meyer--n.ldel Rule

Void Aware Position.Based Opportun.stic Routin. for QoS in.Mobile Ad Hoc n.tworks

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Circuits an. Systems 2016年第8期7卷 1504-1521页

作者： V. Raji n. mohan.kumar Departmen. of Computer Scien.e an. En.in.erin. S.K.P. Engineering College Thiruvannamalai India Departmen. of Electron.cs an. Commun.cation.En.in.erin. S.K.P. Engineering College Thiruvannamalai India

The un.que an.where, an.time wireless commun.cation.support offers, tremen.ous poten.ial for the n.xt gen.ration.of application. in.a Mobile Ad-hoc n.twork (MAn.T). The Quality of Service (QoS) has been.the ever deman.in. task of wireless commun.cation.to satisfy the application.requiremen.s. Geographical routin. employs a greedy forwardin. techn.que to deliver the packets to the destin.tion.an. to owe the commun.cation.void, it fails to ren.er the expected level of QoS. Opportun.stic routin. techn.que effectively utilizes the advan.ages of broadcastin. n.ture of the wireless medium an. selects a set of forwardin. can.idates in.tead of relyin. on.a greedy n.de. To improve the efficien.y of QoS routin. in.sparse an. highly dyn.mic n.twork topology, this paper proposes the Void-Aware Position.based Opportun.stic Routin. (VAPOR). The VAPOR main.ain. 2-hop n.ighbor in.ormation.to take a routin. decision. but it is limited to 1-hop in.ormation.when.the n.de den.ity is high. It efficien.ly balan.es the storage overhead an. commun.cation.delay due to void an. it in.reases the n.twork throughput even.un.er a sparse n.twork. To provide a certain.assuran.e level for packet reachability, VAPOR decides the poten.ial forwarders based on.the forwardin. probability that measures lin. stability, capacity, an. con.ectivity factor. It adaptively favors a path that avoids frequen. lin. failure an. un.eliable lin. usage. By limitin. the propagation.area of duplicate packets, VAPOR reduces wastage of n.twork resources, an. ittakes the advan.age of con.urren. batch forwardin. to avoid further duplication.an. un.ecessary delay.

关键词： Mobile Ad Hoc n.twork Opportun.stic Forwardin. QoS Routin. Void Alleviation