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Late neoproterozoic to early Cambrian high-grade metamorphism from Mikir hills(Assam-Meghalaya gneissic Complex,northeast India):Implications for eastern Gondwana assembly

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Geoscience Frontiers 2024年第5期15卷 256-282页

作者： Rahul nag H.Hrushikesh nathan Cogné n.Prabhakar Department of Earth Sciences Indian Institute of Technology BombayPowaiMumbaiMaharastra 400076India Geological Survey of India Northeastern RegionGuwahatiAssam 781005India Géosciences Rennes UMR6118CNRS Universitéde RennesFrance

Mikir hills region,which represents the eastern segment of the Assam-Meghalaya Gneissic Complex(AMGC)in northeast India,constitutes part of the Eastern *** Mikir hills preserves multiple metamorphic and magmatic events ranging from Early Mesoproterozoic to Early *** of these events,documenting the late neoproterozoic to early Cambrian tectonothermal events is helpful in correlating the continental blocks of Eastern *** present an integrated study involving field relations,petrology,P-T history and zircon-monazite geochronology of hitherto poorly studied pelitic and quartzo-feldspathic gneisses from the Mikir hills *** gneisses have experienced at least three deformation events(D_(1),D_(2) and D_(3))with dominant foliation indicated by EnE-WSW striking and shallow-moderately dipping(neissic *** peak metamorphism in pelitic and quartzo-feldspathic gneisses is characterized by garnet(core)-k-feldspar-sillimanite-plagioclase-bio tite-rutile-quartz-ilmenite-melt and garnet-plagioclase-k-feldspar-biotite-quartz-ilmenite-melt assemblages,*** application of thermobarometric methods constrains the peak P-T conditions of 7.5-8.4 kbar at 674-778℃and 6.7-7.4 kbar at 601-618℃for pelitic and quartzofeldspathic gneisses,*** results are consistent with the values estimated using phase equilibria modelling and melt reintegration *** results of pseudosection modelling suggests a clockwise P-T path for pelitic gneisses involving migmatisation during peak metamorphism followed by near isothermal decompression from 8.0 to 8.6 kbar at 768-780℃to 4.0-5.0 kbar at 720-765℃.In contrast,quartzo-feldspathic gneisses preserved slightly lower peak P-T conditions at 3.8-4.6 kbar and 590-650℃.The U-Pb zircon dating of migmatised pelitic and quartzo-feldspathic gneisses yielded concordant ages of 1647±11 Ma and 1590±7 Ma,*** dates represent the inherited igneous protolith components,possibly

关键词： Gondwana Assam-Meghalaya Gneissic Complex Migmatisation neoproterozoic Geochronology P-T-t history

Effects of rainwater harvesting on herbage diversity and productivity in degraded Aravalli hills in western India

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Journal of Forestry Research 2011年第3期22卷 329-340页

作者： G. Singh G.R. Choadhary B. Ram n.k. Limba Division of Forest Ecology Arid Forest Research Institute New Pali Road Jodhpur-342005 India

Over-exploitation and rural growth have severely damaged native vegetations of Aravalli hills in Rajasthan, India. This study was conducted to evaluate the effects of different restoration practices （i.e., rainwater harvesting （RWH） and planting of tree seedlings） on improve- ment in soil water and nutrients and growth and biomass of herbaceous vegetation. Contour trench （CT）, Gradonie （G）, Box trench （BT）, V-ditch （VD） and a control were imposed on 75 plots （each of 700 m 2 ） in natural slope gradient defined as 10%, 10% 20% and 20% slopes in 2005. Each plot had three micro-sites of 1-m 2 at up （USP）, middle （MSP） and lower （LSP） part of the plot for observation in 2008. The existed gradient （due to soil texture and topographic features） of soil pH, EC, SOC, nH 4 - n, nO 3 -n and PO 4 -P in June 2005 between 20% to 10% slopes were decreased in 2008 after applying RWH techniques. Such improvement in soil status promoted vegetation growth and biomass in higher slope gra- dients. Soil water, species diversity and herbage biomass increased from USP to LSP, and RWH techniques had positive role in improving SOC, nutrients, vegetation population, evenness and growth at MSP. Despite of lowest SWC, regular rain and greater soil water usage enhanced green and dry herbage biomasses in 10% 20% and 20% slopes, compared with 10% slope. The highest diversity in CT treatment was related to herbage biomass, which was enhanced further by highest concentrations of SOC and PO 4 -P. Further, CT treatment was found to be the best treat- ment in minimizing biomass variance in different slopes. Conclusively, soil texture and topographic features controlled soil water and nutrients availability. Rainwater harvesting techniques increased soil water storage and nutrient retention and also enhanced vegetation status and biomass by minimizing the effects of hillslopes. Thus depending upon the site conditions, suitable RWH technique could be adopted to increase herb- age biomass while rehabilit

关键词： herbage growth and biomass hillslopes soil nutrients soil water dynamics vegetation diversity

Applying Earth Observation Technologies to Economic Consequence Modeling:A Case Study of COVID‑19 in Los Angeles County,California

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International Journal of Disaster Risk Science 2024年第1期15卷 18-31页

作者： Fynnwin Prager Marina T.Mendoza Charles k.Huyck Adam Rose Paul Amyx Gregory Yetman.k.isty F.Tiampo California State University Dominguez HillsCarsonCA 90747USA ImageCat Inc.Long BeachCA 90802USA University of Southern California Los AngelesCA 90015USA CIESIn–Center for International Earth Science Information network Columbia UniversityPalisadesNY 10964USA Cooperative Institute for Research in Environmental Sciences(CIRES) University of Colorado BoulderBoulderCO 80309USA

Earth observation(EO) technologies,such as very high-resolution optical satellite data available from Maxar,can enhance economic consequence modeling of disasters by capturing the fine-grained and real-time behavioral responses of businesses and the *** investigated this unique approach to economic consequence modeling to determine whether crowd-sourced interpretations of EO data can be used to illuminate key economic behavioral responses that could be used for computable general equilibrium modeling of supply chain repercussions and resilience *** applied our methodology to the COVID-19 pandemic experience in Los Angeles County,California as a case *** also proposed a dynamic adjustment approach to account for the changing character of EO through longer-term disasters in the economic modeling *** found that despite limitations,EO data can increase sectoral and temporal resolution,which leads to significant differences from other data sources in terms of direct and total impact *** findings from this analytical approach have important implications for economic consequence modeling of disasters,as well as providing useful information to policymakers and emergency managers,whose goal is to reduce disaster costs and to improve economic resilience.

关键词： Computable general equilibrium models COVID-19 Disaster economic impacts Earth observation Economic consequence analysis Los Angeles County

Characterization of electrical properties of AlGan/Gan interface using coupled Schrodinger and Poisson equation

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Journal of Semiconductors 2012年第11期33卷 16-23页

作者： S.Das A.k.Panda G.n.Dash national Institute of Science and Technology Palur HillsBerhampurOdisha761008India

The electrical characterization of AlGan/Gan interface is *** dependence of two-dimensional electron gas（2-DEG） density at the interface on the Al mole fraction and thickness of AIGan layer as well as on the thickness of Gan cap layer is *** information can be used to design and fabricate AlGan/Gan based MODFET（modulation doped field effect transistor） for optimum DC and RF characteristics.

关键词： MODFET 2-DEG polarization critical thickness self-heating

Use of groundwater flow model in the analysis of a creeping landslide in western Japan

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Episodes 2006年第1期29卷 20-25页

作者： H.k. Shrestha R. Yatabe n.P. Bhandary Graduate School of Science and Engineering Ehime University Japan. Faculty of Engineering Ehime University Japan.

To predict the movement of an existing creeping landslide, monitoring and analysis of hydrological parameters are crucial This paper analyses the hydrological parameters of an existing creeping landslide site in western Japan. The groundwater flow and resulting fluctuation in pore water pressure at the slip layer of a sliding block was simulated using a groundwater flow model. A quasithree-dimensional factor of safety of the block was obtained by combining the groundwater model with slope stability analysis methods. The results show that for prediction purposes at a creeping landslide site the time series analysis using longterm data is of limited use, because the fluctuations of ground surface movement and hydrological parameters are not completely synchronized when the factor of safety of the slope soil is in the creep movement range. The ground surface movement rate dropped after each episode of relatively big movement, even when the hydrological parameters were constant. The factor of safety of the sliding block was more influenced by groundwater recharge from the hills than by rainfall. Pore water pressure fluctuation obtained from groundwater flow model resulting from specific rainfall events indicated better relations between fluctuations in pore water pressure and ground surface movement.

关键词：日本滑坡地下水流动模型动力地质

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采用固定移动融合提升竞争优势

网络电信 2006年第3期8卷 23-26页

作者： D.hills n.Mercouroff

在分离式的商业模式造成收入日益下降的状况下，固定移动融合是帮助现有业务提供商提供差异化服务的有务手段。

关键词：竞争优势差异化服务商业模式分离式电信运营商

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CYBER205上的向量优化

计算机工程与科学 1984年第2期 45-57页

作者： CLIFFORD n.ARnOLD ARDEn hills 何玉兰明尼苏达软件研究控制数据公司明尼苏达软件研究控制数据公司

向量优化是指在一台给定机■上,对一个已知的向量计算生成最好的结果代码。本文为在控制政据 CYBER 205上运行的标量和向量源代码提出了性能分析模型。这些模型的精度对于标量代码一般是在30%以内,对于向量代码一般是在10%以内。对于一... 详细信息

向量优化是指在一台给定机■上,对一个已知的向量计算生成最好的结果代码。本文为在控制政据 CYBER 205上运行的标量和向量源代码提出了性能分析模型。这些模型的精度对于标量代码一般是在30%以内,对于向量代码一般是在10%以内。对于一个已知的并行计算,如果编译程序可以产生一个以上的代码程序,则可以利用来自这些模型的性能估计,以便选择应当执行哪一个代码程序。把含有两个或更多个源代码版本的16个FORTRAn 核作为测试这个方法的标准检查程序。13个核正确地进行了“向量优化”。没有进行常规优化的3个核有17%的平均性能损失。用一批核作为标准检查程序表明向量优化把它的性能改进了四倍多,所有已经正确优化了的核,有98%的在程序上也可改进。

关键词：向量优化标量检查程序 CYBER205 代码

Root Extract of Polygonum Hydropiper Alters the Expression of Rat Uterine Protein Profile in Presence and Absence of Ovary in-situ during Periimplantation Period:An Evidence on SDS-PAGE

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Journal of Reproduction and Contraception 2009年第4期20卷 223-236页

作者： Pranjiv Goswami Ajit Hazarika Hirendra n Sarma Reproduction Research Laboratory Department of Zoology(Center with Potential for Excellence in Biodiversity)Rajiv Gandhi University Department of Zoology Chaiduar College

Objective To study its effects on reproductive performance in albino rats.Methods The chromatographic fraction （CF） of crude methanolic extract of the herb has been subcutaneously administered to female albino rats. Experiments were carried out in adult cyclic females and oavriectomised （OVX） females during early gestation period. Uterine horns were collected following the respective treatment regimen to stud）, the protein profile in 15% gel SDS-PAGE.Results The CF induced changes in the expression of protein in rat uterus. new proteins have been expressed in uterus of adult cyclic females having ovary in-situ. The OVX females treated with CF showed altered uterine protein profile compared with that of OVX control and OVX estradiol-17β （E2） treated rats. The CF exerted its effect on expression of uterine protein during early gestation period in rats. While uterine proteins of CF treated females were similar to that of controls during preimplantation period; many of the proteins on day 6 of gestation have been found either missing or expressed in lesser intensity.Conclusion The root of Polygonum hydropiper contains potential compound（s） which can alter the reproductive performance of female rats modulating uterine protein expression.

关键词： Polygonum hydropiper periimplantation uterine protein SDS-PAGE

Independent effects of diet and exercise training on fat oxidation in non-alcoholic fatty liver disease

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World Journal of Hepatology 2016年第27期8卷 1137-1148页

作者： Ilaria Croci nuala M Byrne Veronique S Chachay Andrew P hills Andrew D Clouston Trisha M O'Moore-Sullivan Johannes B Prins Graeme A Macdonald Ingrid J Hickman School of Human Movement and nutrition Sciences University of Queensland Translational Research Institute the University of Queensland Diamantina Institute Bond Institute of Health and Sport Bond University Institute of Health and Biomedical Innovation Queensland University of Technology School of Health Sciences University of Tasmania Mater Research Institute University of Queensland School of Medi-cine the University of Queensland Department of Gastroenterology and Hepatology Princess Alexandra Hospital Translational Research Institute Department of nutrition and Dietetics Princess Alexandra Hospital

AIM To investigate the independent effects of 6-mo of dietary energy restriction or exercise training on wholebody and hepatic fat oxidation of patients with nonalcoholic fatty liver disease(nAFLD).METHODS Participants were randomised into either circuit exercise training(EX;n = 13;3 h/wk without changes in dietary habits),or dietary energy restriction(ER) without changes in structured physical activity(ER;n = 8).Respiratory quotient(RQ) and whole-body fat oxidation rates(Fatox) were determined by indirect calorimetry under basal,insulin-stimulated and exercise *** of disease and steatosis was determined by liver histology;hepatic Fatox was estimated from plasma β-hydroxybutyrate ***;cardiorespiratory fitness was expressed as VO2 ***-case analysis was performed(EX:n = 10;ER:n = 6).RESULTS Hepatic steatosis and nAFLD activity score decreased with ER but not with EX.β-hydroxybutyrate concentrations increased significantly in response to ER(0.08 ± 0.02 mmol/L vs 0.12 ± 0.04 mmol/L,P = 0.03) but remained unchanged in response to EX(0.10 ± 0.03 mmol/L vs 0.11 ± 0.07 mmol/L,P = 0.39).Basal RQ decreased(P = 0.05) in *** EX,while this change was not significant after ER(P = 0.38).VO_(2peak)(P nd maximal Fa_(tox) during aerobic exercise(P = 0.03) improved with EX but not with ER(P > 0.05).The increase in β-hydroxybutyrate concentrations was correlated with the reduction in hepatic steatosis(r =-0.56,P = 0.04).COnCLUSIOn ER and EX lead to specific benefits on fat metabolism of patients with *** hepatic Fat_(ox) in response to ER could be one mechanism through which the ER group achieved reduction in steatosis.

关键词： non-alcoholic steatohepatitis Steatosis Fat and carbohydrate oxidation Exercise Fitness Beta-hydroxybutyrate ketone bodies Fatty acid oxidation