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Volatility and Dynamic Herding in Energy Sector of Developed Markets During COVID-19:A Markov Regime-Switching Approach

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Fudan Journal of the Humanities and Social Sciences 2024年第1期17卷 115-138页

作者： Zuee Javaira Najam us Sahar Syed Danial Hashmi Iram Naz Federal Urdu University of Arts Science and Technology FUUASTIslamabadPakistan AFIPGM National University of Medical SciencesRawalpindiPakistan Faculty of Management Sciences Riphah International UniversityIslamabadPakistan College of Signals National University of Science and TechnologyIslamabadPakistan

This study examines a novel relationship between volatility and dynamic herding behavior during COVID-19 by examining the relationship of oil market volatility,Global volatility and Infectious disease equity market volatility with time-varying herding behavior in energy stock of Developed *** country level data,this study observes that market switch between anti-herding to herding state during pandemic and all three volatility measures have significant impact on dynamic herding state under high dispersion ***,in low dispersion regime only global volatility has significant impact on time-varying herding *** study suggests that the level of speculation in energy sector affect investor behavior;therefore,policy makers should monitor and model possible signals related to health crisis that can be transformed in to financial market crisis.

关键词： Herding Energy sector COVID-19 Volatility Markov regime approach

A modified isooctane-based DNA extraction method from crude oil

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mLife 2023年第3期2卷 328-338页

作者： Armando Alibrandi Rolando Primio Alexander bartholomäus Jens Kallmeyer GFZ German Research Centre for Geoscience Section GeomicrobiologyPotsdamGermany Aker BP LysakerNorway

Microbes from oil reservoirs shape petroleum composition through processes such as biodegradation or *** processes are considered economically detrimental and might pose health and safety *** is therefore crucial to understand the composition of a reservoir's microbial community and its metabolic ***,such analyses are hindered by difficulties in extracting DNA from such complex fluids as crude ***,we present a novel DNA extraction method from oils with a wide American Petroleum Institute(API)gravity(density)*** investigated the ability to extract cells from oils with different solvents and surfactants,the latter both nonionic and ***,we evaluated three DNA extraction ***,the best DNA yields and the highest number of 16S rRNA reads were achieved with isooctane as a solvent,followed by an ionic surfactant treatment using sodium dodecyl sulfate and DNA extraction using the PowerSoil Pro Kit(Qiagen).The final method was then applied to various oils from oil reservoirs collected in aseptic *** the expected low cell density of 10^(1)–10^(3)cells/ml,the new method yielded reliable results,with average 16S rRNA sequencing reads in the order of 41431(±8860)per ***,halophilic,and anaerobic taxa,which are most likely to be indigenous to the oil reservoir,were found in all *** gravity and DNA yield,despite the sufficient DNA obtained,did not show a correlation.

关键词： crude oil DNA extraction method oil reservoir microbiome

Zonal distribution and population biology of Ilyoplax frater (Brachyura:Ocypodoidea:Dotillidae) in a coastal mudflat of Pakistan

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Current Zoology 2010年第2期56卷 244-251页

作者： Noor us SAHER Naureen Aziz QURESHI Centre of Excellence in Marine Biology University of Karachi Department of Fisheries and Aquaculture University of Veterinary and Animal Sciences

Zonal distribution and population biology of llyoplaxfrater were studied in a mangrove mudflat area of Pakistan. The crabs were collected from Korangi creek through transect and quadrat method from low tide level to high tide level. Two transects were delimited in a mangrove area of Korangi creek （24°79′N/67°20′E）. On each transect, three 0.25 m quadrats were sampled at three tidal levels on a monthly basis during low tide periods from March 2001 to February 2002. A total of 1124 crabs were obtained, of which 482 were males and 642 were females. Density of crabs varied between 0 and 90/m^2. The density and size distribution varied and showed significant differences from low to high tide level, and were positively correlated with the percent moisture, percent organic matter and sediment grain size. The carapace width （CW） ranged from 2.5 to 11.5 mm for male and 2.5 to 11.0 mm for female and was not significantly different. The overall sex ratio did not differ significantly from the expected 1：1 throughout the year in small crabs but was significantly different in adult crabs （Z2 = 49.73） with more male crabs, Size frequency distribution showed recruitment of juvenile crabs （〈 4 mm） nearly throughout the year except during June and July. Presence of ovigerous females in all months with seasonal peaks in September, October, December and May indicates seasonal continuous breeding. Weight of egg mass increases with weight of ovigerous females and show positive linear relationship. The estimated mean diameter of egg was 2.83±0.25μm, and the average number of eggs was 3065±902.

关键词： Ilyoplaxfrater Population biology Zonal distribution Sex ratio Fecundity Korangi creek Pakistan

乐观本体论、混沌宇宙观与进步不稳定性——谭嗣同的《仁学》与章太炎的回应

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杭州师范大学学报（社会科学版） 2024年第3期46卷 29-44,70页

作者： [美]慕维仁徐小芳(译) 威斯康辛州立大学麦迪逊校区历史系威斯康辛麦迪逊53711 华中科技大学法学院湖北武汉430074

《仁学》在西方学者眼中是中国历史上最早以中国古典文献对现代西方哲学和科学框架重新诠释的作品,在中国学者笔下这是近代中国新儒学哲学体系融入现代性全球主义的一次大胆尝试,以求能与当时的国际社会在同一维度上对话。然而《仁学》... 详细信息

《仁学》在西方学者眼中是中国历史上最早以中国古典文献对现代西方哲学和科学框架重新诠释的作品,在中国学者笔下这是近代中国新儒学哲学体系融入现代性全球主义的一次大胆尝试,以求能与当时的国际社会在同一维度上对话。然而《仁学》中谭嗣同以其进化最终带来自由的乐观本体论为导向,援引佛教和道教中对有限性的传统解决方案,提出了超越时间的绝对平等观,这一观念遭到了章太炎的批驳。在章太炎看来,进化最终没有超越混沌,相反,它起源于时间世界,且必须有法律之限制,即基于法之平等与等级,官员和国家试图在此基础上将突发事件和混沌合理化。通过对二人不同哲学观的梳理与对比,清晰反映了那一时期的士人对近代中国传统儒家哲学观念转向的尝试与辩论,这对于归纳传统中国儒家的哲学理念具有一定的参考价值与意义。

关键词：章太炎乐观本体论谭嗣同《仁学》混沌宇宙观进步不稳定性

Temporal variations of mesozooplankton abundance and biomass in the mangrove creek area along the Karachi coast, Pakistan

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Acta Oceanologica Sinica 2014年第12期33卷 222-230页

作者： Farah Naz Naureen Aziz Qureshi Noor us Saher Centre of Excellence in Marine Biology University of Karachi Department of Zoology Government College University

The temporal variations of mesozooplankton abundance and biomass （1-Volumetric method by settling volume and displacement volume and 2- Gravimetric method through wet weight, dry weight and ash-free dry weight） with relation to environmental parameters were studied in the mangrove creek area of Karachi coast, Pakistan. The data of mesozooplankton samples along with environmental parameters （temperature, salinity, pH, etc.） were collected during January 1998 to December 1998 from two creek stations. The abun-dance of mesozooplankton also exhibited seasonal trends at both stations. At Sta. S2, the highest and low-est abundance values were observed during post-monsoon and southwest monsoon respectively whereas, at Sta. S1, a clear trend of high abundance in pre-monsoon to low abundance in southwest monsoon was observed. Mesozooplankton abundance was also positively correlated with settling volume, displacement volume, wet weight and dry weight. The highest biomass value was observed in the northeast monsoon and pre-monsoon periods. The results of the canonical analysis of the output from the discriminate function was tested. Out of fifteen variables, only one was significantly different in single character ratios dry weight/ash free-dry weight （F3,23=4.78,P＆lt;0.005）. The mesozooplankton community was collectively composed of 28 taxa. Among these groups, copepoda （66.3%）, gastropod larvae （9.94%）, evadne （4.60%）, zoea （3.60%）, cypris nauplii （2.56%）, lemellibranch larvae （1.87%）, chaetognaths （1.81%）, ostracods （1.73%）, lucifer （1.15%） and barnacles nauplii （1.35%） contributed the most to the similarities within Sta. S1, while copepoda （74.68%）, cypris nauplii （5.29%）, gastropods （4.87%）, barnacles nauplii （4.81%）, evadne （1.72%）, zoea （1.53%） and ca-ridean larvae （1.18%） at Sta. S2. The remaining mesozooplanktonic group were accounted for less than 5% and 6% at Sta. S1 and Sta. S2 respectively, of the total organisms. Similarity percentage （SIMPER） analysis revealed t

关键词： mesozooplankton abundance biomass Karachi Pakistan

Activity and Stability of Rare Earth-Based Hydride Alloys as Catalysts of Hydrogen Absorption-Oxidation Reactions

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Journal of Rare Earths 2004年第6期22卷 871-874页

作者：应桃开高学平胡伟康 Noréus Dag College of Biology and Chemistry Zhejiang Normal University Jinhua 321004China Institute of New Energy Material Chemistry Nankai University Tianjin 300071China Department of Structural Chemistry Arrhenius Laboratory Stockholm University S-106 91 Stockholm Sweden

Rare earth-based AB(5)-type hydrogen storage alloys as catalysts of hydrogen-diffusion electrodes for hydrogen absorption and oxidation reactions in alkaline fuel cells were investigated. It is demonstrated that the metahydride hydrogen-diffusion electrodes could be charged by hydrogen gas and electrochemically discharged, at the same time to retain a stable oxidation potential for a long period. The catalytic activities and stability are almost comparable with a Pt catalyst on the active carbon. Further improvement of performances is expected via reduction of catalyst size into nanometers.

关键词： inorganic chemistry electrocatalyst alkaline fuel cell hydrogen oxidation rare earths

Shine bright: considerations on the use of fluorescent substrates in living monoaminergic neurons in vitro

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Neural Regeneration Research 2015年第9期10卷 1383-1385页

作者： Patrick Schloss Friederike Matth?us Thorsten Lau Biochemical Laboratory Department of Psychiatry and Psychotherapy Central Institute of Mental Health Medical Faculty Mannheim

The biogenic monoamines dopamine （DA）, norepinephrine （NE） and serotonin （5-hydroxytryptamine, 5-HT） are major neuromodulators in the mammalian central nervous system （CNS）. DA containing neurons are found in i） the mesolimbic system in which cell bodies in the ventral tegmental area （VTA） project axons into the amygdala, cortex, hippocampus and the nucleus accumbens; and ii） the nigrostriatal system in which cell bodies located in the substantia nigra pars compacta send their axons into the dorsolateral parts of the striatum （Bjorklund and Dunnett, 2007）. The central noradrenergic neurons are concentrated in distinct brainstem nuclei with the locus coeruleus （LC） being the most prominent nucleus which projects a diffusely arborizing axonal network to most areas of the CNS （Szabadi, 2013）.

关键词： FFN Shine bright considerations on the use of fluorescent substrates in living monoaminergic neurons in vitro

Interferometric orbit determination for geostationary satellites

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Science China(Information Sciences) 2017年第6期60卷 22-32页

作者： Roger M.FusTER Marc FERNNDEZ usóN Antoni BROQUETAS IBARS Remote Sensing Laboratory Department of Signal and Communications TheoryUniversitat Politècnica de Catalunya

Future Geo SAR missions are expected to provide higher resolution radar images featuring shorter revisit times by locating a radar payload on-board of a geostationary satellite. One of the main challenges in Geo SAR processing is accurately determining the satellite orbit to obtain a precise phase history, in order to properly focus the retrieved data. To tackle this challenge, a multiple baseline ground-based interferometer is proposed as a compact and reliable method to achieve an unprecedented accuracy. As a proof of concept, this paper presents the results obtained from a single baseline prototype, whose results can be extrapolated to a larger system, able to be used in future missions.

关键词： GeoSAR interferometry orbit determination geostationary SAR

Comparative Study on Various Strength Parameters of Structural Elements Made from Cross-Laminated Timber

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Journal of Renewable Materials 2022年第6期10卷 1575-1606页

作者： Mohammad Anwar-us-Saadat Janeshka Goonewardena Bidur Kafle Mahmud Ashraf Mahbube Subhani School of Engineering Technology-Civil Melbourne PolytechnicEpping3076Australia School of Engineering Deakin UniversityWaurn Ponds3216Australia

Cross laminated timber(CLT)is an innovative and environment friendly engineered timber product with superior structural *** offers strong resistance against both in-plane and out-of-plane ***,it is widely used as floors,roofs or wall *** experimental research on CLT under various loading conditions has been done in the recent *** article presents a comprehensive review of various design methods to determine basic mechanical properties such as tension,compression and rolling shear strength of CLT with primary focus on Norway *** relevant experimental data available from existing literature were collated and consequently been used to evaluate the performance of various methods to design CLT *** comparison revealed that different methods show considerable variance in predicting the capacity of CLT panels due to the variation in timber species,which affects the corresponding mechanical properties of the *** addition to species,rolling shear properties can also vary considerably depending on the type of experimental technique used for testing.A predictive model has also been proposed to correlate rolling shear strength obtained from shear analogy method to that obtained using planar shear.

关键词： Cross-laminated timber mass timber mechanical strength rolling shear strength planar shear test short span bending test