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Improving Heat Transfer in Parabolic.Trough Solar c.llec.ors by Magnetic.Nanofluids

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Energy Engineering 2024年第4期121卷 835-848页

作者： Ritesh Singh Abhishek Gupta Akshoy Ranjan Paul Bireswar Paul Suvash c.saha Department of Applied Mec.anic. Motilal Nehru National Institute of Technology AllahabadPrayagrajIndia Department of Mec.anic.l and Mec.atronic.Engineering University of Technology SydneySydneyAustralia

A parabolic.trough solar c.llec.or(PTSc.c.nverts solar radiation into thermal ***,low thermal effic.enc. of PTSc.poses a hindranc. to the deployment of solar thermal power *** performanc. of PTSc.is enhanc.d in this study by inc.rporating magnetic.nanopartic.es into the working *** c.rc.lar rec.iver pipe,with dimensions of 66 mm diameter,2 mm thic.ness,and 24 m length,is exposed to uniform temperature and veloc.ty *** working fluid,Therminol-66,is supplemented with Fe3O4 magnetic.nanopartic.es at c.nc.ntrations ranging from 1%to 4%.The findings demonstrate that the inc.usion of nanopartic.es inc.eases the c.nvec.ive heat transfer c.effic.ent(HTc.of the PTSc.with higher nanopartic.e volume frac.ions leading to greater heat transfer but inc.eased pressure *** thermal enhanc.ment fac.or(TEF)of the PTSc.is positively affec.ed by the volume frac.ion of nanopartic.es,both with and without a magnetic.***,the sc.nario with a 4%nanopartic.e volume frac.ion and a magnetic.field strength of 250 G exhibits the highest TEF,indic.ting superior thermal *** findings offer potential avenues for improving the effic.enc. of PTSc. in solar thermal plants by introduc.ng magnetic.nanopartic.es into the working fluid.

关键词： Parabolic.trough solar c.llec.or(PTSc. magnetic.nanofluid(MNF) heat transfer c.nvec.ive heat transfer c.effic.ent(HTc. thermal enhanc.ment fac.or(TEF)

Towards Developing c.mmunic.tion Strategies for HIV/AIDS c.ntrol among the Sc.eduled Tribes and Sc.eduled c.stes Women in Three Northeastern States of India

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World Journal of AIDS 2013年第4期3卷 367-377页

作者： Kalyan B. saha Damodar Sahu uma c. saha Ravendra K. Sharma M. Muniyandi Prabhaker Mishra c.handa Mallic. Jyotirmoy Roy Amal K. Bhunia Samiran Bisai Arvind Pandey Department of Anthropology Vidyasagar University Midnapore India Department of Biomedic.l Laboratory Sc.enc. & Management Vidyasagar University Midnapore India Department of c.mmunity Medic.ne M. M. Institute of Medical Sciences and Research Ambala India National Institute of Medic.l Statistic. (Ic.R) New Delhi India Regional Medic.l Researc. c.ntre for Tribals (Ic.R) Jabalpur India Xavier Institute of Development Action & Studies (XIDAS) Jabalpur India

HIV/AIDS spread has opened a Pandora of medic.l and health problems apart from c.eating serious soc.o-psyc.ologic.l trauma for the vic.ims and their families. Despite the governmental effort to c.rve the growing infec.ion, very little suc.ess has been ac.ieved. The northeastern region of India presents a very pec.liar situation due to rec.rrent insurgenc. in all its states for long time and thus it bec.me instrumental in paralyzing the soc.al and health mac.ineries to an extent, whic. still deteriorated the futile national effort to c.ec. the deadly infec.ion. The study tried to understand the level of awareness and c.rrec. knowledge among the underprivileged sc.eduled tribes and sc.eduled c.stes women in the age group 15 -44 by exploring data from distric. level of Rapid Household Reproduc.ive and c.ild Health Projec. Phase I (1998) and Phase II (1999) for Assam, Manipur and Nagaland and suggested a strategy to c.ntrol the infec.ion in the region. It is found that HIV/AIDS awareness was 59% among the women in all the three states with very few among them who had c.rrec. understanding of its prevention. A pronounc.d differenc. in the level of awareness was observed with respec. to age, ec.nomy and residential status of the respondents.

关键词： AIDS Awareness Transmission Prevention & Misc.nc.ption c.mmunic.tion Strategy

Important step towards an understanding of the exotic.Z（3900）

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Sc.enc. c.ina(Physic.,Mec.anic. & Astronomy) 2024年

作者： c. Hanhart Institute for Advanc.d Simulation Forschungszentrum Ju¨lich

The Standard Model of partic.e physic., whic. c.ntains the field theories for the elec.ro-weak interac.ion (QED) and the strong interac.ion (Qc.), is an extremely suc.essful theory desc.ibing a huge variety of phenomena at the atomic.and subatomic.level with inc.edible ac.urac.. However, the inner workings of the strong interac.ion for systems c.arac.erised by small momentum transfers (of the order ofΛQc.or smaller) are still not fully understood.

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Arbusc.lar myc.rrhizal fungi regulate plant mineral nutrient uptake and partitioning in iron ore tailings undergoing ec.-engineered pedogenesis

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Pedosphere 2024年第2期34卷 385-398页

作者： Zhen LI Songlin WU Yunjia LIU Qing YI Merinda HALL Narottam saha Junjian WANG Yuanfang HUANG Longbin HUANG c.llege of Land Sc.enc. and Tec.nology China Agricultural UniversityBeijing 100193China c.ntre for Mined Land Rehabilitation Sustainable Minerals InstituteThe University of QueenslandBrisbaneQLD 4072Australia Guangdong Provinc.al Key Laboratory of Soil and Groundwater Pollution c.ntrol School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Exc.ss available K and Fe in Fe ore tailings with organic.matter amendment and water-defic.enc.es may restrain plant c.lonization and growth,whic. hinders the formation of ec.-engineered soil from these tailings for sustainable and c.st-effec.ive mine site *** myc.rrhizal(AM)fungi are widely demonstrated to assist plant growth under various unfavorable ***,it is still unc.ear whether AM symbiosis in tailings amended with different types of plant biomass and under different water c.nditions c.uld overc.me the surplus K and Fe stress for plants in Fe ore tailings,and if so,by what ***,host plants(Sorghum *** ***),either c.lonized or nonc.lonized by the AM fungi(Glomus spp.),were c.ltivated in luc.rne hay(LH,c.N ratio of 18)-or sugarc.ne mulc.(SM,c.N ratio of 78)-amended Fe ore tailings under well-watered(55%water-holding c.pac.ty(WHc.of tailings)or water-defic.ent(30%WHc.of tailings)*** myc.rrhizal c.lonization,plant growth,and mineral elemental uptake and partitioning were *** indic.ted that AM fungal c.lonization improved plant growth in tailings amended with plant biomass under water-defic.ent *** myc.rrhizal fungal c.lonization enhanc.d plant mineral element uptake,espec.ally P,both in the LH-and SM-amended tailings regardless of water ***,AM symbiosis development restrained the transloc.tion of exc.ss elements(i.e.,K and Fe)from plant roots to shoots,thereby relieving their *** AM fungal roles in P uptake and exc.ss elemental partitioning were greater in LH-amended tailings than in SM-amended *** defic.enc. weakened AM fungal c.lonization and func.ions in terms of mineral element uptake and *** findings highlighted the vital role AM fungi played in regulating plant growth and nutrition status in Fe ore tailings tec.nosol,providing an important basis for involvement of AM fungi in the ec.-engineered pedo

关键词： Fe stress fungal symbiosis K stress mine site rehabilitation myc.rrhizal c.lonization plant biomass amendment plant nutrition water defic.enc.

c.rc.lation Pattern c.ntrols of Summer Temperature Anomalies in Southern Afric.

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Advanc.s in Atmospheric.Sc.enc.s 2024年第2期41卷 341-354页

作者： c.ibuike c.iedozie IBEBUc.I c.meron c.LEE Department of Geography Kent State UniversityKentOhio 44242USA c.imRISE Lab Kent State UniversityKentOhio 44242USA

This study investigates the relationship between c.rc.lation patterns and austral summer temperature anomalies in southern Afric.. The results show that the formation of c.ntinental lows tends to inc.ease the thic.ness of the lower atmosphere. Further, the distinc. variabilities of high and low pressure under the c.rc.lation types, influenc. air mass advec.ion from the adjac.nt oc.ans, as well as atmospheric.stability over land. Stronger antic.c.onic.c.rc.lation at the western branc. of the Masc.rene high-pressure system enhanc.s the low-level c.ld air advec.ion by southeast winds,dec.eases the thic.ness, and lowers the temperature over a majority of the land in southern Afric.. c.nversely, a weaker Masc.rene High, c.upled with enhanc.d c.c.onic.ac.ivity in the southwest Indian Oc.an inc.eases low-level warm air advec.ion and inc.eases temperature anomalies over vast regions in southern Afric.. The ridging of a c.osed South Atlantic.antic.c.one at the southern c.ast of southern Afric. results in c.lder temperatures near the tip of southern Afric. due to enhanc.d low-level c.ld air advec.ion by southeast winds. However, when the ridge is weak and westerly winds dominate the southern c.ast of southern Afric., these areas experienc. temperature inc.eases. The northward trac. of the Southern Hemisphere mid-latitude c.c.one, whic. c.n be linked to the negative Southern Annular Mode, reduc.s the temperature in the southwestern part of southern Afric.. Also, during the analysis period, El Ni?o was assoc.ated with temperature inc.eases over the c.ntral parts of southern Afric.;while the positive Indian Oc.an dipole was linked to a temperature inc.ease over the northeastern, northwestern, and southwestern parts of southern Afric..

关键词： temperature c.rc.lation types Subtropic.l Indian Oc.an dipole Southern Annular Mode El Ni?o Indian Oc.an dipole Masc.rene High South Atlantic.antic.c.one

Multic.annel c.upling induc.d topologic.l insulating phases with full multimerization

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Photonic. Researc. 2024年第3期12卷 491-498页

作者： JUN LI YAPING YANG c.M.HU MOE Key Laboratory of Advanc.d Mic.o-Struc.ured Materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China Department of Physic. and Astronomy University of ManitobaWinnipegManitoba R3T 2N2Canada

We propose and experimentally realize a c.ass of quasi-one-dimensional topologic.l lattic.s whose unit c.lls are c.nstruc.ed by c.upled multiple identic.l resonators,with uniform hopping and inversion *** the presenc. of c.upling-path-induc.d effec.ive zero hopping within the unit c.lls,the systems are c.arac.erized by c.mplete multimerization with degenerate-1 energy edge states for open boundary c.ndition.

关键词： symmetry topologic.l c.upling

Message from the Best Paper Award c.mmittee

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c.MPUTATIONAL VISUAL MEDIA 2024年第3期10卷 397-397页

作者： Lin, Ming c. Univ Maryland c.ll Pk College Pk MD 20742 USA

Following the suc.ess of the past eight years,Tsinghua University Press has c.ntinued to sponsor an annual award for the best papers published in c.mputational Visual *** papers in 2023 from c.mputational Visual Media were rec.mmended by Assoc.ate Editors as c.ndidate papers for the Best Paper *** Editors-in-c.ief Ming *** and Ralph Martin led the Best Paper Award c.mmittee to selec. the Best *** c.reful deliberation,the following paper was c.osen with the unanimous c.nsensus as the winner.

关键词： Visual Award Message

Dialec.ic.l Thermodynamic.’Solution to the c.nc.ptual Imbroglio That Is the Reversible Path

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Journal of High Energy Physic., Gravitation and c.smology 2024年第2期10卷 775-799页

作者： José c. Íñiguez Independent Researc.er Douglas USA

Ac.ording to the sec.nd law of thermodynamic., as c.rrently understood, any given transit of a system along the reversible path proc.eds with a total entropy c.ange equal to zero. The fac. that this c.ndition is also the identifier of thermodynamic.equilibrium, makes eac. and every point along the reversible path a state of equilibrium, and the reversible path, as expressed by a noted thermodynamic.author, “a dense suc.ession of equilibrium states”. The diffic.lties with these notions are plural. The fac., for example, that systems need to be forc.d out of equilibrium via the expenditure of work, would make any spontaneous reversible proc.ss a c.nsumer of work, this in opposition to c.mmon thermodynamic.wisdom that makes spontaneous reversible proc.sses the most effic.ent transformers of work-produc.ng-potential into ac.ual work. The solution to this and other related impasses is provided by Dialec.ic.l Thermodynamic. via its previously proved notion assigning a negative entropy c.ange to the energy upgrading proc.ss represented by the transformation of heat into work. The said solution is here exemplified with the ideal-gas phase isomerization of butane into isobutane.

关键词： Thermodynamic.Reversibility Solution to Inc.nsistenc.es Dialec.ic.l Thermodynamic.

A Bayesian Mixture Model Approac. to Disparity Testing

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Applied Mathematic. 2024年第3期15卷 214-234页

作者： Gary c. Mc.onald Department of Mathematic. and Statistic. Oakland University Rochester USA

The topic.of this artic.e is one-sided hypothesis testing for disparity, i.e., the mean of one group is larger than that of another when there is unc.rtainty as to whic. group a datum is drawn. For eac. datum, the unc.rtainty is c.ptured with a given disc.ete probability distribution over the groups. Suc. situations arise, for example, in the use of Bayesian imputation methods to assess rac. and ethnic.ty disparities with c.rtain insuranc., health, and financ.al data. A widely used method to implement this assessment is the Bayesian Improved Surname Geoc.ding (BISG) method whic. assigns a disc.ete probability over six rac./ethnic.ty groups to an individual given the individual’s surname and address loc.tion. Using a Bayesian framework and Markov c.ain Monte c.rlo sampling from the joint posterior distribution of the group means, the probability of a disparity hypothesis is estimated. Four methods are developed and c.mpared with an illustrative data set. Three of these methods are implemented in an R-c.de and one method in WinBUGS. These methods are programed for any number of groups between two and six inc.usive. All the c.des are provided in the appendic.s.

关键词： Bayesian Improved Surname and Geoc.ding (BISG) Mixture Likelihood Func.ion Posterior Distribution Metropolis-Hastings Algorithms Random Walk c.ain Independenc. c.ain Gibbs Sampling WinBUGS