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Chinese Physics Letters 2006年第11期23卷 2944-2947页

作者： Dipak ghosh Argha Deb Samabrata Sarkar Prabir kumar Haldar Nuclear and Particle Physics Research Centre Department of Physics Jadavpur University Kolkata-700032 India

The intermittent fluctuation of target evaporated particles is studied in both ring-like and jet-like events emitted in ^32 S-emulsion interactions at 200 A Ge V within the framework of multi-dimensional factorial moment methodology using the concept of the Hurst exponent. It is observed that the intermittent fluctuation in the ring-like event is self-similar, whereas in the jet-like event fluctuation is self-affine. However, study indicates that the strength of fluctuation in the ring-like events is much stronger than that in the jet-like events.

关键词： HIGH-ENERGY MULTIPARTICLE PRODUCTION JET-LIKE INTERMITTENCY DISTRIBUTIONS ANNIHILATION PARTICLES MOMENTS GEV/C

社区对红树林生态系统的生计依赖及其决定因素：来自孟加拉国的经验证据

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社区对红树林生态系统的生计依赖及其决定因素：来自孟加拉国的经...

作者： Devashish kumar ghosh 北京林业大学

学位级别：硕士

尽管孟加拉红树林在全球森林中只占很小的比例,但它被视为宝贵的生态系统,直接或间接地为邻近社区提供广泛的生计支持。大约有四到五百万人直接或间接依赖这些资源获取收入。在20世纪最后25年,全球红树林损失估计在35%到86%之间(粮农组... 详细信息

尽管孟加拉红树林在全球森林中只占很小的比例,但它被视为宝贵的生态系统,直接或间接地为邻近社区提供广泛的生计支持。大约有四到五百万人直接或间接依赖这些资源获取收入。在20世纪最后25年,全球红树林损失估计在35%到86%之间(粮农组织,2003;杜克等人,2007)。诸多学者研究发现红树林生态系统的转变与人为力量密切相关(Feka and Ajonina,2011;Ajonina et al.,2008;Mukhopadhyay et al.,2018;Van der Stocken et al.,2019)。因此,本文着眼于红树林生态系统的未来可持续性和恢复力,研究邻近社区对红树林生态系统的生计依赖。在这项研究中,通过使用半结构化问卷对红树林的邻近社区居民进行了访谈。本文采用stata软件运用logit回归和Heckman两阶段回归分析了农户森林收入的决定因素。研究发现,一方面,增加非林工作机会将导致林业收入减少,而参与GO-NGO活动(小额信贷)将鼓励受访者从邻近社区收获更多资源;另一方面,研究发现低等收入人群应该参与到保护活动中,因为他们从这些珍贵的资源中获得了更多的收入。这两种方法都证明了集体管理组织活动对于降低以林为生的人们的收入具有必然的作用。因此,各GO-NGO机构应挺身而出,加强共同管理活动,为孙德尔本斯地区各级人民创造更多就业机会。

关键词：生计依赖红树林生态系统决定因素林业收入孟加拉国

Molecular dynamics study on growth of carbon dioxide and methane hydrate from a seed crystal

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Chinese Journal of Chemical Engineering 2019年第9期27卷 2074-2080页

作者： Prajakta Nakate Bappa ghosh Subhadip Das Sudip Roy Rajnish kumar Chemical Engineering and Process Development National Chemical LaboratoryPune 411008India Physical and Materials Chemistry Division National Chemical LaboratoryPune 411008India Department of Chemistry Chaudhary Ranbir Singh UniversityfindHaryana-126102 Department of Chemical Engineering Indian Institute of TechnologyMadrasChennai 600036Tamil NaduIndia

In the current work,molecular dynamics simulation is employed to understand the intrinsic growth of carbon dioxide and methane hydrate starting from a seed crystal of methane and carbon dioxide *** comparison was carried out because it has relevance to the recovery of methane gas from natural gas hydrate reservoirs by simultaneously sequestering a greenhouse gas like *** seed crystal of carbon dioxide and methane hydrate was allowed to grow from a super-saturated mixture of carbon dioxide or methane molecules in water *** different concentrations(1:6 and 1:8.5)of CO2/CH4 molecules per water molecule were chosen based on gas–water composition in hydrate *** molecular level growth as a function of time was investigated by all atomistic molecular dynamics simulation under suitable temperature and pressure range which was well above the hydrate stability zone to ensure significantly faster growth *** concentration of CO2 molecules in water played a significant role in growth kinetics,and it was observed that maximizing the CO2 concentration in the aqueous phase may not result in faster growth of CO2 *** the contrary,methane hydrate growth was independent of methane molecule concentration in the aqueous *** have validated our results by performing experimental work on carbon dioxide hydrate where it was seen that under conditions appropriate for liquid CO2,the growth for carbon dioxide hydrate was very slow in the beginning.

关键词： CH4 recovery Natural gas hydrate CO2 sequestration Kinetics F4 order parameter Cage dynamics Thermodynamics

Naringin ameliorates acetic acid induced colitis through modulation of endogenous oxido-nitrosative balance and DNA damage in rats

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The Journal of Biomedical Research 2014年第2期28卷 132-145页

作者： Venkatashivam Shiva kumar Anuchandra Ramchandra Rajmane Mohammad Adil amit Dattatraya Kandhare Pinaki ghosh Subhash Laxman Bodhankar Department of Pharmacology Poona College of PharmacyBharati Vidyapeeth Deemed University

The aim of this study was to evaluate the effect of naringin on experimentally induced inflammatory bowel dis- ease in rats. Naringin （20, 40 and 80 mg/kg） was given orally for 7 days to Wistar rats before induction of colitis by intrarectal instillation of 2 mL of 4% （v/v） acetic acid solution. The degree of colonic mucosal damage was analyzed by examining mucosal damage, ulcer area, ulcer index and stool consistency. Intrarectal administration of 4% acetic acid resulted in significant modulation of serum alkaline phosphatase, lactate dehydrogenase, superoxide dismutase （SOD）, glutathione （GSH）, malondialdehyde （MDA） and myeloperoxidase （MPO） content along with colonic nitric oxide （NO）, xanthine oxidase （XO） level and protein carbonyl content in the colonic tissue as well as in blood. Naringin （40 and 80 mg/kg） exerted a dose dependent （P 〈 0.05） ameliorative effect, as it significantly increased hematological parameter as well as colonic SOD and GSH. There was a significant （P 〈 0.05） and dose dependant inhibition of macroscopical score, ulcer area along with colonic MDA, MPO activity by the 7 days of pretreatment of naringin （40 and 80 mg/kg）. Biochemical studies revealed a significant （P 〈 0.05） dose dependant inhibition in serum alkaline phosphatase （ALP） and lactate dehydrogenase （LDH） levels by pretreatment of naringin. Increased levels of colonic NO, XO, protein carbonyl content and DNA damage were also sig- nificantly decreased by naringin pretreatment. The findings of the present investigation propose that naringin has an anti-inflammatory, anti-oxidant and anti-apoptotic potential effect at colorectal sites as it modulates the production and expression of oxidative mediators such as MDA, MPO, NO and XO, thus reducing DNA damage.

关键词： acetic acid, apoptosis, fluorimetric analysis of DNA unwinding, inflammatory bowel disease, my-eloperoxidase, naringin, nitrite/nitrate, oxidative stress porotein carbonyl content, vascular permeability, xanthineoxidase

Dynamic threshold voltage operation in Si and SiGe source junctionless tunnel field effect transistor

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Journal of Semiconductors 2014年第11期35卷 32-39页

作者： Shibir Basak Pranav kumar Asthana Yogesh Goswami Bahniman ghosh Department of Electrical Engineering Indian Institute of Technology Kanpur Microelectronics Research Center 10100Burnet RoadBldg.160University of Texas at Austin

We propose a dynamic threshold voltage j unctionless tunnel FET （DT-JLTFET） in wnlcn me mresnolu voltage can be dynamically adjusted, resulting in higher ON-current. Through 2D numerical simulations, it is presented that the threshold voltage in the DT-JLTFET can be adjusted by applying a voltage to the adjust gate. The impact of the threshold voltage shift on the overall performance of the device is also studied. A comparison is made between the dynamic threshold voltage characteristics of a silicon JLTFET and a Sio.7Geo.3 source JLTFET.

关键词： SiGe tunnel field effect transistor ON-current

Special issue on emerging challenges in multi-agent sensing,control and optimization

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Control Theory and Technology 2020年第4期18卷 337-338页

作者： Bijoy kumar ghosh Jiangping Hu Xiaoming Hu Texas Tech University LubbockUSA University of Electronic Science and Technology of China Chengdu China 3 KTH Royal Institute of TechnologyStockholmSweden

Up to now,a large number of theoretical achievements and application scenarios have been obtained in sensing,control and optimization of multi-agent ***,challenges are still emerging from the rapid development of artificial intelligence and urgent need for distributed *** aim of the special issue is to present in a systematic way some new results in the fields of distributed sensing,control and optimization of cyber-physical systems,particularly in resource allocation,machine learning,observer and filtering,consensus and constrained control.

关键词： agent artificial optimization

Extraction of locked-up coal by strengthening of rib pillars with FRP--A comparative study through numerical modelling

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International Journal of Mining Science and Technology 2017年第2期27卷 261-267页

作者： Das Arka Jyoti Mandal Prabhat kumar ghosh Chandra Nath Sinha Amalendu CSIR-Central Institute of Mining and Fuel Research Dhanbad 826001India

In some of the coalfields in India, coal seams are only developed but no extraction of pillars is possible due to the presence of surface or sub-surface structures and also non-availability of stowing materials which leads to huge amounts of coal being locked-up underground. Spontaneous heating and fire, accumulation of poisonous gases, severe stability issues leading to unsafe workings and environmental hazards are the major problems associated with the developed coal pillars. So, there is a pressing need for a technology for the mining industry to extract the huge amount of coal locked-up under different constraints. In this study, the locked-up coal is proposed to be extracted by artificially strengthening the rib pillars. The detailed comparative study is carried out to know the increase of extraction percentage of locked-up coal by strengthening the rib pillars with FRP. Extraction methodology is designed and studied through numerical modelling for its stability analysis to evaluate its suitability of application in underground.

关键词： FRP加固数值模拟提取率煤田肋柱表面结构稳定性分析充填材料

Finite size effect on dissociation and diffusion of chiral partners in Nambu-Jona-Lasinio model

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Chinese Physics C 2022年第4期46卷 114-122页

作者： Paramita Deb Sabyasachi ghosh Jai Prakash Santosh kumar Das Raghava Varma Department of Physics Indian Institute of Technology BombayPowaiMumbai-400076India Indian Institute of Technology Bhilai GEC CampusSejbaharRaipur-492015ChhattisgarhIndia School of Physical Sciences Indian Institute of Technology GoaPonda-403401GoaIndia

The masses of pion and sigma meson modes,along with their dissociation in the quark medium,provide detailed spectral structures of the chiral *** has been observed in pA and pp systems both at LHC and *** this research,we studied the restoration of chiral symmetry by investigating the finite size effect on the detailed structure of chiral partners in the framework of the Nambu-Jona-Lasinio *** diffusion and conduction have been studied using this dissociation *** is determined that the masses,widths,diffusion coefficients,and conductivities of chiral partners merge at different temperatures in the restoration phase of chiral ***,merging points are shifted to lower temperatures when finite size effect is introduced into the *** strengths of diffusions and conductions are also reduced once the finite size is introduced in the calculations.

关键词： heavy-ion collisions quark gluon plasma effective QCD

Embryology of Maldives Clownfish, Amphiprion nigripes (Amphiprioninae)

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Journal of Ocean University of China 2012年第2期11卷 174-180页

作者： Swagat ghosh Thipramalai Thankappanpillai Ajith kumar Thangavel Balasubramanian Centre of Advanced Study in Marine Biology Faculty of Marine SciencesAnnamalai UniversityParangipettai-608502Tamil NaduIndia

This study investigated the embryonic development of Maldives clownfish Amphiprion nigripes under natural conditions (28 - 30℃) at a lagoon of Agatti Island, Lakshadweep, India. The newly deposited fish egg was capsule-shaped and orange-red, with a (0.73 ± 0.04) mm3 yolk containing 5 - 10 fat globules. The embryonic development of fertilized eggs was divided into 26 stages and the time elapsing for each stage was recorded. Results showed that the cleavage was rapid, with the first division observed 1 h 20 min after fertilization. Blastulation occurred 4 h later, followed by gastrulation 12 h after fertilization, with a yolk volume of (0.61 ± 0.06) mm3. The organogenesis process started 22 h after fertilization when the blastopores closed and notochord formation began. The embryonic stage was recorded 24 h later, with the appearance of forebrain, midbrain, hindbrain, melanophores on yolk-sac and 22 somites, and a decreased yolk volume of (0.54 ± 0.08) mm3. Other organs developed well 31 h after fertilization, whereas the heart started beating and blood circulation began 78 h later. Red pigmentation (erytrophores) appeared 96 h after fertilization, with a small yolk volume of (0.22 ± 0.02) mm3. Mouth developed well and eyes were noticeable 120 h later, with head, pectoral fin and tail frequently moving 144 h after fertilization. The embryo reached the pre-hatching stage 168 h later and started to hatch after 170 - 180 h incubation. This study first detailed the embryonic development and yolk absorption of A. nigripes under natural conditions.

关键词：胚胎发育马尔代夫小丑鱼受精卵萌芽阶段血液循环红色色素卵黄囊