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Nuclear Science and Techniques 2018年第1期29卷 65-76页

作者： I.m.A.Tag-Eldin m.m.Taha S.S.A.Hassan Nuclear Experimental Physics Department Nuclear Research Center Atomic Energy Authority mathematics and Theoretical Physics Department Nuclear Research Center Atomic Energy Authority

Elastic scattering differential cross sections for a p- ~4He system are calculated within the framework of optical limit approximation of the Glauber multiple scattering model. Three different ranges for proton energy(E_(lab)), 19〈E_(lab)〈50 me V, 100≤E_(lab)≤1730 me V, and 45 ≤E_(lab)≤393 Ge V are considered. It is shown that the Pauli blocking fails to describe the data up to the proton energy, E_(lab)〈100 me V. For higher proton energies, a qualitative agreement is obtained. The observed elastic scattering differential cross section is nicely reproduced in the whole range of scattering angles in the center of mass system up to Θ_(c.m.)〈200° for 19〈E_(lab) ≤100 me V when the effect of both the nucleon–nucleon(NN) phase variation parameter γNN and higher-order momentum transfer components(λ_n; n = 1 and 2) of(NN) elastic scattering amplitude is included. In the range of 200 E_(lab) 1730 me V, introducing λ_n plays a significant role in describing the data up to the momentum transfer, q^2≤1:2(Ge V/c)~***, it is found that considering only the effect of phase variation parameter, cNN, improved the agreement in the region of minima for elastic scattering differential cross section for 45≤E_(lab)≤393 Ge V. The values of cNNand kn as a function of incident proton energies are presented.

关键词： Elastic scattering Optical limit approximation Glauber multiple scattering model

Gastric cystica profunda:Another indication for minimally invasive endoscopic resection techniques?

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World Journal of Gastroenterology 2024年第27期30卷 3278-3283页

作者： Harjot k Bedi Douglas motomura Neal Shahidi Department of medicine University of British ColumbiaVancouver V6Z 2K5BCCanada

Gastric cancer presents a significant global health burden,as it is the fifth most common malignancy and fourth leading cause of cancer mortality *** in incidence rates across regions underscores the multifactorial etiology of this *** overall 5-year survival rate remains low despite advances in its diagnosis and *** surgical gastrectomy was previously standard-of-care,endoscopic resection techniques,including endoscopic mucosal resection and endoscopic submucosal dissection(ESD)have emerged as effective alternatives for early *** to surgical resection,endoscopic resection techniques have comparable 5-year survival rates,reduced treatment-related adverse events,shorter hospital stays and lower *** also enables en bloc resection,thus affording organ-sparing curative endoscopic resection for early *** this editorial,we comment on the recent publication by Geng et al regarding gastric cystica profunda(GCP).GCP is a rare gastric pseudotumour with the potential for malignant *** presents a diagnostic challenge due to its nonspecific clinical manifestations and varied endoscopic *** are several gaps in the literature regarding the diagnosis and management of GCP which warrants further research to standardize patient *** in endoscopic resection techniques offer promising avenues for GCP and early gastric cancers.

关键词： Early gastric cancer Endoscopy Endoscopic submucosal dissection Gastric cystica profunda

Delayed information induces oscillations in a dynamical model for infectious disease

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International Journal of Biomathematics 2019年第2期12卷 163-196页

作者： Anuj kumar Prashant k Srivastava Anuradha Yadav School of mathematics Thapar Institute of Engineering and Technology Patiala 147004 India Department of mathematics Indian Institute of Technology Patna Patna 801103India

During disease outbreak,it has been observed that information about the disease prevalence induces the individuafs behavioral *** information is usually assumed to be generated by the density of infective individuals and active mass *** delay in reporting of these infective individuals may have its impact on generated ***,to study the impact of delay on information generation,and therefore on the disease dynamics,a delay differential equation model is proposed and *** dynamics of information with delay effect is also modeled by a separate rate *** analysis is performed and a unique infected equilibrium is obtained when the basic reproduction number(R0)is greater than one,whereas the disease free equilibrium always *** R0m is found to be locally stable independent of delay *** unique infected equilibrium is found to be locally stable till delay reaches a threshold *** global stability of the unique infected equilibrium is also established under some parametric conditions by constructing a suitable Lyapunov *** occurrence of Hopf bifurcation is observed when the delay in information crosses the threshold ***,the direction and stability of bifurcating periodic solutions is ***,we observed the occurrence of Hopf-Hopf bifurcation at two different *** first delay threshold,the endemic equilibrium loses its st ability and produces periodic oscillations via Hopf *** further regains its stability at second delay threshold via another Hopf ***,the delay effect on information shows possibility of stability *** experiments are carried out to support the obtained analytical *** study infers that the disease will show persistent oscillations if there is a significant time lag in reporting of infective after the disease ***,the delay in dissemination of information shows rich and

关键词： Information behavioral response delay Hopf bifurcation Hopf-Hopf bifurcation

Ethnography of Women＇ s Perception of Their Workwear： Comparative Study between South Afi＇ica and Uganda

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Journalism and mass Communication 2014年第8期4卷 517-526页

作者： mutungi Emmanuel mugendi k. m'Rithaa Bongiwe kolisi kyambogo University Kampala Uganda Cape Peninsula University of Technology Cape Town South Africa

The study investigates women＇s perception of the workwear, and their awareness about how garment fit can affect one＇s body image. Drawing on the theory of practice, we propose an ethnographic account of women＇s perception of workwear and their preferred alternative. The study presents a comparative perspective of attitudes, and perceptions about the workwear of women in South Africa and Uganda explored through the habitus. We present pro-vocal recollections of women perceptions on the current workwear ideal for men which omits women＇ body physique. In particular, from the current personal protective equipment （PPE）, we examine ＂the overall＂ common attire at site and an integral part of the PPE. Overalls are designed following the men＇s physique, and women in work place are subjected to put them on yet, differences in body structure/shapes amongst women, namely, hour glass, bottom hourglass, spoon, and pear shape, are hardly considered. The identification of different female body shapes is made possible through the 3D anthropometric measurements using a Three Dimensional （3D） Body Scanner （TC2）. We develop endogenous explanations of what women would want to see as workwear based on the understanding of women found on site in men＇s workwear or without any work weal- in South Africa and Uganda. Using ethnographic design approach, we capture voices of 10 women from South Africa and Uganda through participant observation and unstructured interviews. We analyze data thematically to determine the patterns of their responses toward an appropriate workwear. moreover, we （re）construct these responses into possible design models that would be ideal workwear for women, which gives them the pride, respect, dignity, and confidence as women.

关键词： workwear women body image body shape design

Amberlyst-15 catalyzed synthesis of alkyl/aryl/heterocyclic phosphonates

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Chinese Chemical Letters 2011年第8期22卷 895-898页

作者： U.m.Rao kunda V.N.Reddy mudumala C.S.Reddy Gangireddy B.R.Nemallapudi k.N.Sandip S.R.Cirandur Department of Chemistry Sri Venkateswara UniversityTirupati 517502.India Bio-Organic Division BARCMumbaiIndia

A novel and efficient procedure for the synthesis of alkyl phosphonates through one pot condensation of alkyl halide and trialkyl /aryl phosphite in the presence of Amberlyst-15 as catalyst under solvent free conditions was *** demonstrated several advantages such as good yields of products,simple operation,convenient separation and inexpensive catalyst.

关键词： Dialkyl/aryl alkyl phosphonates Amberlyst-15

CFD-DEm analysis of particle polydispersity on the performance of fluidised bed reactor during silane pyrolysis Author links open overlay panel

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Particuology 2024年第8期91卷 72-87页

作者： Akshayveer Vijay m.Shinde mS2Discovery Interdisciplinary Research Institute Wilfrid Laurier UniversityWaterlooOntarioN2L3C5Canada Department of Chemical Engineering Indian Institute of Technology(BHU)Varanasi221005India

A CFD-DEm model is developed for chemical vapour deposition of silane in a fluidized bed reactor to investigate the effect of polydispersity on local phase dynamics,mass and heat transport,as well as the rate of Si *** gas-phase fines formation and heterogeneous deposition on the seed particle,as well as the scavenging effect for Si particle growth,are *** method is first validated against the experimentally measured Si deposition rate,percentage of fine production and minimum fluidisation ***,the properties,primarily particle intermixing,fluidisation behaviour and bubble dynamics along with the deposition process,are analyzed for several polydisperse beds under various operating *** effect of polydispersity of the bed on a fraction of the bubble size,dense phase expansion and interchange coefficient between various phases is thoroughly investigated to establish a correlation with reactor *** results show that broad-Gaussian particle size distribution(PSD)exhibits excellent improvement in fluidisation behaviour,resulting in a high deposition rate,and minimum formation of Si fines.

关键词： CFD-DEm method Chemical vapour deposition(CVD) Particle size distribution Silicon Gas-solid fluidized bed

Current status and future trends of precision agricultural aviation technologies

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International Journal of Agricultural and Biological Engineering 2017年第3期10卷 1-17页

作者： Yubin Lan Chen Shengde Bradley k Fritz College of Engineering South China Agricultural University/National Center for International Collaboration Research on Precision Agricultural Aviation Pesticides Spraying Technology(NPAAC)Guangzhou 510642China Department of Biological and Agricultural Engineering Texas A&M UniversityCollege StationTX 77845USA Texas A&m AgriLife Research and Extension Center BeaumontTX 77713USA United States Department of Agriculture(USDA) Agricultural Research Service(ARS)Aerial Application Technology Research UnitCollege StationTexas77845USA

modern technologies and information tools can be used to maximize agricultural aviation productivity allowing for precision application of agrochemical *** paper reviews and summarizes the state-of-the-art in precision agricultural aviation technology highlighting remote sensing,aerial spraying and ground verification ***,the authors forecast the future of precision agricultural aviation technology with key development directions in precision agricultural aviation technologies,such as real-time image processing,variable-rate spraying,multi-sensor data fusion and RTk differential positioning,and other supporting technologies for UAV-based aerial *** review is expected to provide references for peers by summarizing the history and achievements,and encourage further development of precision agricultural aviation technologies.

关键词： precision agricultural aviation technology remote sensing aerial spraying UAV pesticide ground verification

Flow and heat transfer of composite porous medium saturated with nanofluid

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Propulsion and Power Research 2019年第2期8卷 173-181页

作者： J.C.Umavathi k.Hemavathi Department of mathematics Gulbarga UniversityGulbarga 585106KarnatakaIndia

The present article is concerned with the heat transfer of nanofluid saturated with porous medium sandwiched between clear viscous fluid filled in a vertical *** model is developed to analyze the behavior of nanofluids taking into account the solid volume *** governing equations are obtained based on the Darcy's law for the porous medium and Tiwari and Das model to define the *** viscous and Darcy dissipation terms are included in the energy *** transformed dimensionless governing equations are solved analytically using regular *** are carried out on the flow characteristics for different values of Grashof number,Brinkman number,solid volume fraction and porous parameter using water as base fluid and copper as *** and heat transfer are also observed using five different types of *** is found that the maximum value of Nusselt number is obtained for silver nanoparticle.

关键词： Nanofluid Porous matrix Viscous fluid Vertical channel

metallic subwavelength-cavity semiconductor nanolasers

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Light(Science & Applications) 2012年第1期1卷 79-86页

作者： k.Ding C.Z.Ning School of Electrical Computerand Energy EngineeringArizona State UniversityTempeAZ 85287USA

miniaturization has been an everlasting theme in the development of semiconductor *** important breakthrough in this process in recent years is the use of metal-dielectric composite structures that made truly subwavelength lasers *** different designs of metallic cavity semiconductor nanolasers have been proposed and *** this article,we will review some of the most exciting progresses in this newly emerging *** particular,we will focus on metallic-cavity nanolasers with volume smaller than wavelength cubed under electrical injection with emphasis on high-temperature *** devices will serve as an important component in the future integrated nanophotonic systems due to its ultra-small size.

关键词： Semiconductor Lasers Nanolasers Plasmons Plasmon Polaritons metal Cavity

A taxonomic assessment and redefinition of the Lucanus fortunei species group in China (Coleoptera: Lucanidae: Lucaninae)

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Zoological Systematics 2023年第4期48卷 279-360页

作者： Zhihong Zhan Daniel k.Young Department of Entomology College of Plant ProtectionNanjing Agricultural UniversityNanjing 210000China Department of Entomology University of WisconsinMadisonWI53706USA

This study focused on and examined the traditional Lucanus fortunei group comprising more than 60%of all Lucanus taxa in *** species treatment includes a description,distribution,collecting methods,natural history and digital habitus and other pertinent images.A dichotomous taxonomic key was created specific to the Chinese *** group and the related *** Lucanus fortunei group is arguably the largest group in terms of species richness in Lucanus Scopoli;however,the group definition is unclear and needs to be critically assessed and *** work and sampling of the Chinese Lucanus fortunei species group was conducted between summer,2017 and summer,*** sites included Anhui,Zhejiang,Fujian,Taiwan,Jiangxi,Hubei,Hunan,Guizhou,Sichuan,Chongqing,Yunnan,Xizang,Guangdong,and Guangxi ***-two taxa(species and subspecies),including 473 specimens,previously considered to fall within the scope of the Lucanus fortunei group were examined by morphological *** new groups,the Lucanus brivioi group,the Lucanus kraatzi group,and the Lucanus parryi group are proposed and separated from the traditional Lucanus fortunei group,based on morphological *** subspecies,*** laetus,is proposed as the synonym of the nominate subspecies.

关键词： Stag beetles Lucanus group definition taxonomy synonym