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secondary Calcification of Planktic Foraminifera from the Indian sector of southern Ocean

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Acta Geologica sinica(English Edition) 2015年第1期89卷 27-37页

作者： Rahul MOHAN suhas s.sHETYE Manish TIWARI Narayanpillai ANILKUMAR National Centre for Antarctic and Ocean Research National Institute of Oceanography

This study focused on planktic foraminifera in plankton tows and surface sediments from the western Indian sector of southern Ocean in order to evaluate the potential foraminiferal secondary calcification and/or dissolution in the sediment. It is found that the symbiotic foraminiferal species are abundant in the subtropical region, whereas non-symbiotic species dominate in the sub-Antarctic and polar frontal regions. The distribution of the symbiotic and non-symbiotic foraminiferal species is controlled by temperature, salinity, light, nutrients and phytoplankton biomass. There is also a lateral southern extent in abundance of planktic foraminifera from surface sediments to plankton tows. The shell weights of the planktic foraminifera N. pachyderma, G. bulloides and G. ruber within the surface sediments are on an average heavier by 27%, 34% and 40% respectively than shells of the same size within the plankton tows, indicative of secondary calcification. The planktic foraminiferal isotopes show the presence of heavier isotopes in the surface sediment foraminifera as compared to plankton tows, thus confirming secondary calcification. secondary calcification in G. ruber occurs in the euphotic zone, whereas in case of N. pachyderma and G. builoides it is at deeper depths. We also observed a decrease in the shell spines in surface sediment foraminifera as compared to plankton tows, indicative of the morphological changes that foraminifera underwent during gametogenesis.

关键词： southern Ocean foraminifera climate change stable isotopes shell weight

structural Tuning of Low Band Gap Intermolecular Push/Pull side-chain Polymers for Organic Photovoltaic Applications

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Chinese Journal of Polymer science 2017年第9期35卷 1073-1085页

作者： Ansuman Nayak P.s. Rama sreekanth santosh Kumar sahu Duryodhan sahu Department of Chemistry National Institute of Science and Technology Palur Hills Berhampur Odisha India 761008 Department of Chemistry Gandhi Institute of Engineering and Technology Gunpur Odisha India Department of Mechanical Engineering National Institute of Science and Technology Palur Hills Berhampur Odisha India 761008

A series of novel low band gap donor-acceptor （D-A） type organic co-polymers （BT-F-TPA, BT-CZ-TPA and BT-sI-TPA） consisting of electron-deficient acceptor blocks both in main chains （M1） and at the pendant （M2） were polymerized with different electron rich donor （M3-M5） blocks, i.e., 9,9-dihexyl-9H-fluorene, N-alkyl-2,7-carbazole, and 2,6-dithinosilole, respectively, via suzuki method. These polymers exhibited relatively low band gaps （1.65-1.88 eV） and broad absorption ranges （680-740 nm）. Bulk heterojunction （BHJ） solar cells incorporating these polymers as electron donors, blended with [6,6]-phenyl-C61-butyric acid methyl ester （PC61BM） or [6,6]-phenyl-Cvl-butyric acid methyl ester （PC71BM） as electron-acceptors in different weight ratios were fabricated and tested under 100 mW/cm2 of AM 1.5 with white-light illumination. The photovoltaic device containing donor BT-sI-TPA and acceptor PC71BM in 1：2 weight ratio showed the best power conversion efficiency （PCE） value of 1.88%, with open circuit voltage （Voc） = 0.75 V, short circuit current density （Jsc） = 7.60 mA/cm2, and fill factor （FF） = 33.0%.

关键词： Polymer solar cells Low band gap Conducting polymers Charge transfer Donor-acceptor Bulk heterojunctionsolar cell

Quantum photonics: feature introduction

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Photonics Research 2019年第12期7卷 I0001-I0002页

作者： XIAN-MIN JIN M.s.KIM BRIAN J.sMITH school of Physics and Astronomy and state Key Laboratory of Advanced Optical Communication systems and Networks Shanghai Jiao Tong UniversityShanghai 200240China QOLs Blackett LaboratoryImperial College LondonLondon SW72AZUK Department of Physics and Oregon Center for Optical Molecularand Quantum ScienceUniversity of OregonEugeneOregon 97403USA

Photons,the individual quanta of the light field,are what the science of quantum photonics is dedicatedly *** manipulation and coherent control of photons in quantum photonics enables the exploration of various quantum phenomena of high fundamental *** the meantime,due to the fast speed and a lack of the interaction with the environment,photons are now regarded as a promising platform for the emerging quantum information processing(QIP)***,there is a growing number of works on quantum computing,quantum communication,and quantum metrology that are solidly based on the techniques of quantum photonics.

关键词： quantum coherent enable

Factors influencing farmers’adoption of solar water-pumping systems in Gujarat

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Clean Energy 2024年第3期8卷 157-165页

作者： M sathish Kumar Y.A.Lad R.s.Pundir International Agribusiness Management Institute Anand Agricultural UniversityAnand388110GujaratIndia Department of HRD&PM International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia Department of Agribusiness Economics and Policies International Agribusiness Management InstituteAnand Agricultural UniversityAnand388110GujaratIndia

Agriculture has played an important role in the growth of the Indian *** and electricity are essential inputs for agriculture *** produces the third-largest amount of electricity in the world,behind China and the *** an incentive to increase production,most states provide free electricity to *** electricity has decreased groundwater levels and increased electricity *** objective of this study was to find out the factors that influenced farmers to adopt a solar water-pumping system in *** samples were randomly *** study examined the entire state of *** hundred and fifty farmers who adopted solar water-pumping systems were interviewed,including 50 banana farmers,50 cotton farmers and 50 groundnut *** data were collected through an *** adoption of solar water-pumping systems by farmers was identified using factor *** software was used to analyse the data *** this study,only two factors contributed to the variance of 59.469%.The adoption of solar water pumps by farmers was influenced by government policy and economic *** economic benefit variance of 33.20%was found,while a government policy variance was 26.27%.A solar water-pumping system has low initial costs,flexible credit policies motivate adoption,solar water-pumping systems can save electricity,and maintenance and repair costs are *** policy that includes solar water-pumping systems is motivated by awareness,subsidies for adoption and a fair price to sell energy *** are recommended to adopt a solar water-pumping system in conjunction with a drip irrigation system to receive additional *** successful scheme will be recommended to other states in India for implementation.

关键词： solar water-pumping system factor analysis banana cotton groundnut famers

Exploring novel candidate genes from the Mouse Genome Informatics database: Potential implications for avian migration research

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Integrative Zoology 2016年第4期11卷 240-249页

作者： Andrea CONTINA Eli s.BRIDGE Jeffrey F.KELLY Oklahoma Biological survey University of OklahomaNormanOklahomaUSA Department of Biology University of OklahomaNormanOklahomaUSA

To search for genes associated with migratory phenotypes in songbirds,we selected candidate genes through annotations from the Mouse Genome Informatics database and assembled an extensive candidate-gene ***,we implemented a next-generation sequencing approach to obtain DNA sequences from the Painted Bunting *** focused on those sequences that were conserved across avian species and that aligned with candidate genes in our mouse *** genotyped short sequence repeats from the following candidate genes:ADRA1d,ANKRD17,CIsH and *** studied the possible correlations between allelic variations occurring in these novel candidate migration genes and avian migratory phenotypes available from the published lit*** found that allele variation at MYH7 correlated with a calculated index of speed of migration(km/day)across 11 species of *** highlight the potential of the Mouse Genome Informatics database in providing new candidate genes that might play a crucial role in regulating migration in birds and possibly in other *** research effort shows the benefits and limitations of working with extensive genomic datasets and offers a snapshot of the challenges related to cross-species validation in behavioral and molecular ecology studies.

关键词： avian migration candidate gene approach Mouse Genome Informatics MYH7 songbirds

Does Beta Thalassemia Increase the Incidence of Bell＇s Palsy？

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Journal of Health science 2017年第3期5卷 135-138页

作者： shahrazad s. AI Jebori Department of Family and Community Medicine Kerbala Medical College

A five-year old Iraqi patient with beta thalassemia major was presented with recurrent attack of Bell＇s palsy on 2 successive years being a milder one in the second year. This is a rare occurrence in beta thalassemia major patients and needs to be further explored. This is a case report of a nine-year old Iraqi child who is the only child born to parents of secondary consanguinity relatives from Babil Province who was diagnosed as beta thalassemia on the age of 6 months and is on regular blood transfusion and iron chelation therapy of deferasirox tablets （Exjade）, his medical follow up takes place at Babil Thalassemia center in Babil Maternity and Child Hospital. On the age of five years, he was presented with a sudden onset of right sided Bell＇s palsy within twenty four hours of swimming in a cool swimming pool at his home in July 2011. A neurosurgeon examined him at that time, no investigations were done, the diagnosis was purely clinical, steroid ＆ neurotonics were recommended as a treatment for the condition, antiviral agents were not prescribed, lacrimation ＆ taste were not affected, there was a slow improvement, two weeks later physiotherapy sessions including facial massage ad electric stimulation were recommended after which the child improved. The next year, another attach of Bell＇s Palsy developed at a similar time with the same sequel of events, this time the attack was milder and with residual effects seen in the eye ＆ mouth. This coincidence of beta thalassemia and Bell＇s palsy should be further studied by observational epidemiologic studies to prove or disprove the hypothesis that thalassemic patients especially children are at higher risk of developing Bell＇s palsy than healthy children. Beta thalassemia patients may be at higher risk of developing Bell＇s Palsy.

关键词： B Thalassemia major Bell's palsy Babil Thalassemia center.

Current understanding of the origin of equiaxed grains in pure metals during ultrasonic solidification and a comparison of grain formation processes with low frequency vibration,pulsed magnetic and electric-current pulse techniques

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Journal of Materials science & Technology 2021年第6期65卷 38-53页

作者： Nagasivamuni Balasubramani Gui Wang David H.st John Matthew s.Dargusch Centre for Advanced Materials Processing and Manufacturing(AMPAM) School of Mechanical and Mining EngineeringUniversity of QueenslandSt Lucia

The formation of fine,non-dendritic equiaxed grains throughout a casting without the addition of refiners(*** of alloy chemistry),is made possible by using ultrasonic,magnetic or pulsed magnetic and electric current pulse *** dominant mechanisms proposed for the grain refinement produced during the application of an external field are cavitation phenomena assisted nucleation or fragmentation of dendrites(ultrasonic field),wall crystals arising from the cold surface of the mould(electric current pulse,magnetic and pulsed magnetic fields).In all these cases fluid flow provides an additional contribution(*** temperature gradients,growth rate and remelting of dendrites)to maintaining an equiaxed grain *** origin of equiaxed grains under an external field also depends on the casting conditions(volume and shape of casting)and the type of alloy other than the mechanisms specific to a particular *** current work aims to provide a detailed understanding of the various factors and mechanisms that influence the grain refinement achieved during the solidification of pure metals(magnesium and zinc)subjected to Ultra sonic Treatment(UsT).The role of the temperature range of UsT application,time duration and an unpreheated sonotrode are examined with respect to the origin,evolution of equiaxed grain structure,morphology and the columnar to equiaxed *** origin of grains was analysed from three fundamental aspects that contribute to refinement(i)heterogeneous nucleation(ii)fragmentation of existing dendrites and(iii)grains produced from the colder surfaces(arising from mould walls or vibrating surfaces as wall crystals).A comparison of UsT refinement with mechanical,low-frequency vibration,electric current pulse and magnetic field solidification of pure metals has also been provided to highlight the importance of the cold surfaces(sonotrode and mould wall)in influencing grain refinement.

关键词： Ultrasonic treatment Grain refinement Equiaxed grains Magnesium Zinc solidification

FINITE-TIME H∞ CONTROL FOR A CLAss OF MARKOVIAN JUMPING NEURAL NETWORKs WITH DIsTRIBUTED TIME VARYING DELAYs-LMI APPROACH

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Acta Mathematica scientia 2018年第2期38卷 561-579页

作者： p.baskar s.padmanabhan m.syed ali New Horizon College of Engineering Marathhalli Bangalore 560103 India RNs Institute of Technology Channasandra Bangalore 560098 India Department of Mathematics Thiruvalluvar University Vellore Tamilnadu 632115 India

In this article, we investigates finite-time H∞ control problem of Markovian jumping neural networks of neutral type with distributed time varying delays. The mathematical model of the Markovian jumping neural networks with distributed delays is established in which a set of neural networks are used as individual subsystems. Finite time stability analysis for such neural networks is addressed based on the linear matrix inequality approach. Numerical examples are given to illustrate the usefulness of our proposed method. The results obtained are compared with the results in the literature to show the conservativeness.

关键词： Finite-time H∞ control, Markovian jumping neural networks Lyapunov stability

The Binary Black Hole scenario for the BL Lacertae Object AO 0235+16

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Chinese Journal of Astronomy and Astrophysics 2003年第6期3卷 513-525页

作者： G.E.Romero Jun-HuiFan s.E.Nuza InstitutoArgentinodeRadioastrononia C.C.5（1894）VillaElisaBs.As.Argentina CenterforAstrophysics GuangzhouUniversityGuangzhou510400 DepartamentodeFisicaJ.J.Giambiagi FCENUBAPabellon1CiudadUniversitaria1428BuenosAiresArgentina

Recent analysis of the long term radio light curve of the extremely variableBL Lacertae object AO 0235+16 by Raiteri et al. have revealed the presence of recurrent outburstswith a period of ～ 5.7 +- 0.5 yr. Periodicity analysis of the optical light curve also showsevidence for a shorter period. Here we discuss whether such a behavior can be explained by a binaryblack hole model where the accretion disk of one of the supermassive black holes is precessing dueto the tidal effects of the companion. We estimate the mass of the accreting hole and analyzeconstraints on the secondary mass and the orbital parameters of the system. It is possible toprovide a viable interpretation of the available multiwavelength data.

关键词： galaxies: active BL lacertae objects: individual: AO 0235+16 -gamma rays:theory black hole physics