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快速热处理化学气相沉积法制备用于电子产品热管理的轻质柔性石墨烯

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新型炭材料（中英文） 2023年第3期38卷 534-542页

作者： Satendra Kumar manoj goswami Netrapal Singh Uday Deshpande Surender Kumar N.Sathish Academy of Scientific and Innovative Research(AcSIR) Ghaziabad 201002India CSIR-Advanced Materials and Processes Research Institute(AMPRI) Bhopal 462026India UGC-DAE Consortium for Scientific Research University CampusIndore 452001India

下一代电子产品的飞速发展对热管理提出了更高的要求。初始石墨烯的导热性是铜的13倍。本文通过快速热处理化学气相沉积(RTP-CVD)法制备了具有大sp^(2)结构域的单层、双层和多层石墨烯(SLG、BLG、FLG),进一步通过低浓度H_(2)还原制备了... 详细信息

下一代电子产品的飞速发展对热管理提出了更高的要求。初始石墨烯的导热性是铜的13倍。本文通过快速热处理化学气相沉积(RTP-CVD)法制备了具有大sp^(2)结构域的单层、双层和多层石墨烯(SLG、BLG、FLG),进一步通过低浓度H_(2)还原制备了高导热石墨烯。在1000℃下生长25 min制备出SLG,利用拉曼光谱和透射电子显微镜(TEM)研究了石墨烯的品质。为了验证RTP-CVD法生成的石墨烯的散热能力,将其作为2TB固态硬盘的散热器,通过红外热成像仪进行了研究。结果证明,RTP-CVD生长的石墨烯用于消费电子产品的热管理测试时性能表现优异。SLG显示温度(最高)比商用铜散热器低5℃,SLG的散热能力比商用铜散热器快200倍左右。综上,利用RTP-CVD法制备的轻质的柔性石墨烯可以成为下一代5G设备和消费电子产品热管理的更好选择。

关键词：石墨烯热管理消费类电子产品化学气相沉积

Investigation of point defect evolution and Voronoi cluster analysis for magnesium during nanoindentation

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Journal of Magnesium and Alloys 2023年第3期11卷 1029-1042页

作者： Pragyan goswami Snehanshu Pal manoj Gupta Department of Metallurgical and Materials Engineering National Institute of TechnologyRourkelaOdisha 769008India Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore

The present study investigates the effect of nanoindentation on single-crystal magnesium specimens using the embedded-atom method potential in molecular dynamics *** are done under dynamic loading where the load-bearing capacity and change in the structural configuration are studied on the basal(Z-direction)and two prismatic planes(X-and Y-directions)with varying indenter *** investigation of structural evolution is done using atomic displacement analyses to measure the net magnitude of displacement,atomic strain analyses to evaluate the shear strain developed in the process,and Wigner-Seitz defect analyses to calculate the total vacancies at varied ***,Voronoi analyses are done when indented on the basal plane to identify the cluster distribution at different planar depths of the *** the analyses,it has been observed that the load-bearing capacity of the specimen varies with the indentation velocity and the direction of indentation on the ***,it is seen that the observed shear and total atomic displacement in the Z-direction is the least in comparison to the other two *** partial dislocation 1/3is seen to be majorly present and the population of dislocation loops is more abundant for lower indenter ***,clustersandare the major indices developed during nanoindentation on the basal plane where they exhibit symmetrical distribution as observed from the Z-direction.

关键词： Magnesium Molecular dynamics Nanoindentation Voronoi analysis Wigner-Seitz defect analysis

Phosphorene: Current status, challenges and opportunities

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Frontiers of Chemical Science and Engineering 2019年第2期13卷 296-309页

作者： Anandarup goswami manoj B.Gawande Division of Chemistry Department of Sciences and HumanitiesVignan's Foundation for ScienceTechnology and Research (VFSTR)VadlamudiGuntur-522213Andhra PradeshIndia Regional Centre of Advanced Technologies and Materials Department of Physical ChemistryFaculty of SciencePalacky University OlomoucSlechtitelu 27783 71 OlomoucCzech Republic

The field of 2-dimensional (2D) materials has witnessed a sharp growth since its inception and can majorly be attributed to the substantial technical and scientific developments, leading to significant improvements in their syntheses, characterization and applications. In the list of 2D materials, the relatively newer addition is phosphorene, which ideally consists of a single layer of black phosphorous. Keeping in mind the past, and ongoing research activities, this short account offers a brief overview of the present status and the associated challenges in the field of phosphorene-related research, with special emphasis on their syntheses, properties, applications and future opportunities.

关键词： phosphorene black phosphorous anisotropy single layer thermoelectric chemical vapor deposition catalysis battery supercapacitor

基于生物信息学对骨关节炎铁超载关键基因的筛选与验证

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中国组织工程研究 2025年第9期29卷 1972-1980页

作者：邓柯淇李光第 goswami ASHUTOSH 刘星余何孝勇贵州医科大学贵州省贵阳市550004 贵州医科大学附属医院骨外科贵州省贵阳市550004

背景:铁超载是指体内铁积累过多的情况,可引起各种组织的病理改变。目前,对于骨关节炎中铁超载相关的分子机制和潜在基因靶点,仍有待进一步的研究和探索。目的:通过生物信息学手段分析骨关节炎铁超载关键基因,并利用动物实验加以验证,... 详细信息

背景:铁超载是指体内铁积累过多的情况,可引起各种组织的病理改变。目前,对于骨关节炎中铁超载相关的分子机制和潜在基因靶点,仍有待进一步的研究和探索。目的:通过生物信息学手段分析骨关节炎铁超载关键基因,并利用动物实验加以验证,以期为铁超载角度防治骨关节炎提供新的思路。方法:使用GEO数据库和GeneCards数据库筛选出与骨关节炎相关的基因和铁超载相关的基因。然后,取两者的交集,得到骨关节炎和铁超载共同相关的基因集合。采用GO和KEGG富集分析筛选这些基因的功能和通路。为了进一步研究这些基因之间的相互作用,构建PPI网络,并利用Cytoscape软件的5种计算方法来识别骨关节炎铁超载的关键基因(Hub基因)。将12只雄性SD大鼠分为骨关节炎组与对照组(正常大鼠),每组6只,骨关节炎组大鼠采用改良Hulth方法建立膝骨关节炎模型,并使用PCR检测Hub基因在两组大鼠膝关节组织中的表达情况。结果与结论:①共获得51个骨关节炎铁超载基因,GO富集分析表明其主要参与细胞因子受体结合、趋化因子受体结合、细胞因子活性、生长因子受体结合及寡糖结合等过程;②KEGG富集分析表明骨关节炎铁超载基因主要参与肿瘤坏死因子信号通路、脂质和动脉粥样硬化等信号通路;③构建蛋白质-蛋白质相互作用网络,进一步分析获得细胞间黏附分子1(intercellular cell adhesion molecule-1,ICAM-1)、肿瘤坏死因子配体超家族成员11(tumor necrosis factor superfamily member 11,TNFSF11)、骨髓瘤细胞癌基因(myelocytomatosis oncogene,MYC)、Janus激酶2(janus kinase 2,JAK2)及白细胞介素6,5个骨关节炎铁超载Hub基因,动物实验证实其在对照组与骨关节炎组大鼠膝关节组织中的表达有显著差异(P<0.05);④结果显示,ICAM-1,TNFSF11,MYC,JAK2及白细胞介素6可作为骨关节炎铁超载的关键基因,有望成为防治骨关节炎的新靶点。

关键词：骨关节炎铁超载关键基因差异基因生物信息学动物实验实验验证生物标志物

Cosmological parameters for spatially flat dust filled Universe in Brans-Dicke theory

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Research in Astronomy and Astrophysics 2017年第3期17卷 55-66页

作者： Gopi Kant goswami Department of Mathematics Kalyan E G.CollegeBhilai-490 006C.G.India

We have investigated late time acceleration for a spatially fiat dust filled Universe in Brans- Dicke theory in the presence of a positive cosmological constant A. Expressions for Hubble＇s constant, luminosity distance and apparent magnitude have been obtained for our model. The theoretical results are compared with observed values of the latest 287 high redshift （0.3 ≤ z ≤1.4） Type Ia supernova data taken from the Union 2.1 compilation to estimate present values of matter and dark energy parame- ters, （Ωm）0 and （ΩA）0. We have also estimated the present value of Hubble＇s constant H0 in light of an updated sample of Hubble parameter measurements including 19 independent data points. The results are found to be in good agreement with recent astrophysical observations. We also calculated various physical parameters such as matter and dark energy densities, present age of the Universe and decelera- tion parameter. The value for Brans-Dicke-coupling constant ω is set to be 40 000 based on accuracy of solar system tests and recent experimental evidence.

关键词： cosmology osmological parameters - cosmology observations- dark energy-Brans-Dicke theory

Design of a Li-Fi Transceiver

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Wireless Engineering and Technology 2017年第4期8卷 71-86页

作者： Pavas goswami manoj Kumar Shukla Department of Electronics School of Engineering HBTU Kanpur India

The latest uproar in this era is about a technology termed as Light Fidelity or more commonly known as Li-Fi. There are currently two trends being seen: First, the extension or enrichment of wireless services and other being increased in user demand for these services, but the available RF spectrum for usage is very limited. So the new technology of Li-Fi came into picture, which uses visible light as a source of communication. Li-Fi is the most recent development which is resourceful. In this technology, LEDs are used to transmit data in the visible light spectrum. This technology can be compared with that of Wi-Fi and offers advantages like increased accessible spectrum, efficiency, security, low latency and much higher speed. This research paper aims at designing a Li-Fi transceiver using Arduino that is able to transmit digital data. The hardware has been designed using Eagle CAD (version 7.1.0) tool and Proteus design tool (version 8). The software coding is done by using Java (version 8). Successful transmission and reception of text, image and video signals is carried out on the transceiver. Hence this research work gives an innovative way of designing a transceiver which works by using off the shelf low cost components and using visible light spectrum.

关键词： Light Fidelity (Li-Fi) Visible Light Communication (VLC) Arduino Light Emitting Diode (LED) Optical Wireless Communication (OWC)

Plant growth-promoting rhizobacteria--alleviators of abiotic stresses in soil: A review

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Pedosphere 2020年第1期30卷 40-61页

作者： Madhurankhi goswami Suresh DEKA Environmental Biotechnology Laboratory Resource Management and Environment SectionLife Sciences DivisionInstitute of Advanced Study in Science and Technology(IASST)Guwahati Assam 781035(India)

With the continuous increase in human population,there is widespread usage of chemical fertilizers that are responsible for introducing abiotic stresses in agricultural crop *** stresses are major constraints for crop yield and global food security and therefore require an immediate *** implementation of plant growth-promoting rhizobacteria(PGPR)into the agricultural production system can be a profitable alternative because of its efficiency in plant growth regulation and abiotic stress *** bacteria have the potential to promote plant growth and to aid in the management of plant diseases and abiotic stresses in the soil through production of bacterial phytohormones and associated metabolites as well as through significant root morphological *** changes result in improved plant-water relations and nutritional status in plants and stimulate plants’defensive mechanisms to overcome unfavorable environmental ***,we describe the significance of plant-microbe interactions,highlighting the role of PGPR,bacterial phytohormones,and bacterial metabolites in relieving abiotic environmental stress in *** research is necessary to gather in-depth knowledge on PGPR-associated mechanisms and plant-microbe interactions in order to pave a way for field-scale application of beneficial rhizobacteria,with the aim of building a healthy and sustainable agricultural ***,this review aims to emphasize the role of PGPR in growth promotion and management of abiotic soil stress with the goal of developing an eco-friendly and cost-effective strategy for future agricultural sustainability.

关键词： phytohormones plant-microbe interaction root colonization root morphological change secondary metabolites stress alleviation stress tolerance

ANALYSIS OF A DISCRETE-TIME GI/GEO/1/N QUEUE WITH MULTIPLE WORKING VACATIONS

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Journal of Systems Science and Systems Engineering 2010年第3期19卷 367-384页

作者： Veena goswami G.B.MUND School of Computer Application KIIT University School of Computer Engineering KIIT University

This paper analyzes a finite-buffer renewal input single server discrete-time queueing system with multiple working vacations. The server works at a different rate rather than completely stopping working during the multiple working vacations. The service times during a service period, service time during a vacation period and vacation times are geometrically distributed. The queue is analyzed using the supplementary variable and the imbedded Markov-chain techniques. We obtain steady-state system length distributions at pre-arrival, arbitrary and outside observer＇s observation epochs. The analysis of actual waiting-time distribution and some performance measures are carried out. We present some numerical results and discuss special cases of the model.

关键词： Discrete-time finite-buffer working vacations supplementary variable waiting-time

ANALYSIS OF DISCRETE-TIME QUEUES WITH BATCH RENEWAL INPUT AND MULTIPLE VACATIONS

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Journal of Systems Science & Complexity 2012年第3期25卷 486-503页

作者： Veena goswami G.B.MUND School of Computer Application KIIT University School of Computer Engineering KIIT University

This paper analyzes a discrete-time multiple vacations finite-buffer queueing system with batch renewal input in which inter-arrival time of batches are arbitrarily distributed. Service and vacation times are mutually independent and geometrically distributed. The server takes vacations when the system does not have any waiting jobs at a service completion epoch or a vacation completion epoch. The system is analyzed under the assumptions of late arrival system with delayed access and early arrival system. Using the supplementary variable and the imbedded Markov chain techniques, the authors obtain the queue-length distributions at pre-arrival, arbitrary and outside observer＇s ob- servation epochs for partial-batch rejection policy. The blocking probability of the first, an arbitrary- and the last-job in a batch have been discussed. The analysis of actual waiting-time distributions measured in slots of the first, an arbitrary- and the last-job in an accepted batch, and other performance measures along with some numerical results have also been investigated.

关键词： Batch input discrete-time finite buffer multiple vacations partial-batch rejection.