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Using detection dogs and genetic analyses of scat to expand knowledge and assist felid conservation in Misiones, Argentina

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Integrative Zoology 2014年第5期9卷 623-639页

作者： Karen e.DeMATTeO Miguel A.RINAS Carina F.ARGÜeLLeS Bernardo e.HOLMAN Mario S.DI BITeTTI Barbara DAVeNPORT Patricia G.PARKeR lori S.eGGeRT Department of Biology University of MissouriSt.LouisUSA WildCare Institute at the Saint louis Zoo St.LouisUSA Ministerio de ecología y Recursos Naturales Renovables Argentina Instituto de Biología Subtropical(IBS)-nodo Posadas Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET)-Universidad Nacional de Misiones(UNaM)Argentina Facultad de Ciencias exactas Químicas y NaturalesUNaMArgentina IBS-nodo Puerto Iguazú CONICET-UNaMArgentina Asociación Civil Centro de Investigaciones del Bosque Atlántico Argentina PackLeader Dog Training LLC Division of Biological Sciences University of MissouriColumbiaUSA

Many carnivores require large ranges to meet their ecological and energetic needs;however,anthropogenic changes threaten species and their *** traps have been used to effectively collect data on carnivores in a variety of habitat types;however,a single survey effort is typically limited to species that have similar body size,habitat use and movement patterns,and individual identification of animals is not always pos*** evaluated whether scat detection dogs could effectively survey for 4 wide-ranging felids that vary in these characteristics:jaguars(Panthera onca),pumas(Puma concolor),ocelots(Leopardus pardalis)and oncillas(Leopardus tigrinus).From June to October 2009 and May to August 2011,a detection dog-handler team detected 588 scats,from which 176 unique genotypes were *** assigned sex to 84.7%of the genotyped scats and identified 55 individuals multiple *** effectiveness of these noninvasive techniques(detection dogs and genetic analyses of scat)not only opens the door for additional studies in areas that were previously difficult or impossible with standard survey techniques,but also provides conservationists with a set of tools that overcome some of the limitations associated with the use of camera traps alone.

关键词： conservation detection dogs felids genetics noninvasive techniques

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Simultaneous optimization of even flow and land and timber value in forest planning:a continuous approach

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Forest ecosystems 2021年第4期8卷 645-658页

作者： Jose M.Gonzalez-Gonzalez Miguel e.Vazquez-Mendez Ulises Dieguez-Aranda Departamento de enxenaria Agroforestal Universidade de Santiago de Compostela.Escola Politecnica Superior de EnxenariaR/Benigno Ledo27002 LugoSpain Departamento de Matematica Aplicada Instituto de MatematicasUniversidade de Santiago de Compostela.Escola Politecnica Superior de EnxenariaR/Benigno Ledo27002 LugoSpain

Background:Forest management planning involves deciding which silvicultural treatment should be applied to each stand and at what time to best meet the objectives established for the *** this,many mathematical formulations have been proposed,both within the linear and non-linear programming frameworks,in the latter case generally considering integer variables in a combinatorial *** present a novel approach for planning the management of forests comprising single-species,even-aged stands,using a continuous,multi-objective formulation(considering economic and even flow)which can be solved with gradient-type ***:The continuous formulation has proved robust in forest with different structures and different number of *** results obtained show a clear advantage of the gradient-type methods over heuristics to solve the problems,both in terms of computational time(efficiency)and in the solution obtained(effectiveness).Their improvement increases drastically with the dimension of the problem(number of stands).Conclusions:It is advisable to rigorously analyze the mathematical properties of the objective functions involved in forest management planning *** continuous bi-objective model proposed in this paper works with smooth enough functions and can be efficiently solved by using gradient-type *** advantages of the new methodology are summarized as:it does not require to set management prescriptions in advance,it avoids the division of the planning horizon into periods,and it provides better solutions than the traditional combinatorial ***,the graphical display of trade-off information allows an a posteriori articulation of preferences in an intuitive way,therefore being a very interesting tool for the decision-making process in forest planning.

关键词： even-aged forest management Forest-level optimization Continuous optimization Gradient-type algorithms

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Gold and Base Metals Associated with Uranium Mineralization in Some lower Carboniferous Rock Units in the Wadi Abu el Mogheirat Area, Southwestern Sinai, egypt

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Acta Geologica Sinica(english edition) 2021年第6期95卷 2087-2099页

作者： Osama R.SALLAM Abdalla S.ALSHAMI Abd elhadi A.ABBAS e.GUIBAL Nuclear Materials Authority CairoEgypt Institut Mines Telecom-Mines Ales Centre des Materiaux des Mines d’AlesUniversityMontpellierFrance

The lower Carboniferous sediments at Wadi Abu el Mogheirat consist of four stratigraphic formations, from base upwards: Um Bogma, el Hashash, Magharet el Maiah and Abu Zarab formations. The most-concentrated radioactive anomalies at Wadi Abu el Mogheirat are in the middle member of the Um Bogma Formation. The gibbsitic marl in this formation shows the highest uranium contents(around 710 ppm). Gibbsitic marl and black gibbsite of the middle Um Bogma Formation show higher enrichment in Co, Cu, Mn, Ni, Pb, Zn, U, V, Ce and Th. Black gibbsite contains the highest total rare earth elements concentration, especially in terms of LRees, while gibbsitic marl contains the highest content of HRees. Anomalous contents of gold at Wadi Abu el Mogheirat are recorded for the first time in the gibbsitic marl(content: 10.4 ppm), black gibbsite(2.8 ppm) of the middle member of the Um Bogma Formation and in the siltstones of the el Hashash Formation(0.6 ppm). Gibbsitic marl shows the presence of uranothorite, celestite, zircon, atacamite, barite, xenotime and rutile. These characteristic demonstrate that the middle member of the Um Bogma Formation constitutes a potential source for gold. This conclusion is reinforced by the potential to exploit other metals such as Co, Cu, Mn, Ni, Pb, Zn, U, V, Th and Ce as by-products.

关键词： gibbsite rare earth elements Um Bogma

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User-friendly finite element design of main entries, barrier pillars,and bleeder entries

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International Journal of Mining Science and Technology 2018年第1期28卷 3-10页

作者： William G.Pariseau Mark K.Larson Heather e.Lawson Douglas R.Tesarik Department of Mining engineering University of Utah Spokane Mining Research Division NIOSH

This contribution describes development and application of a user-friendly finite element program,UT3PC, to address three important problems in underground coal mine design:(1) safety of main entries,(2) barrier pillar size needed for entry protection, and(3) safety of bleeder entries during the advance of an adjacent longwall *** the finite element method is by far the most popular engineering design tool of the digital age, widespread use by the mining community has been impeded by the relatively high cost of and the need for lengthy specialized training in numerical *** of UT3PC overcomes these impediments in three easy ***, a material properties file is prepared for the considered ***, mesh generation is automatic through an interactive process.A third and last step is simply execution of the *** using data from several western coal mines illustrate the ease of using the application for analysis of main entries, barrier pillars, and bleeder entry safety.

关键词： Finite element Coal Mine layout design Main entries Barrier pillars Bleeder entries

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The acceleration of a high-charge electron bunch to 10 GeV in a 10-cm nanoparticle-assisted wakefield accelerator

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Matter and Radiation at extremes 2024年第1期9卷 15-24页

作者： Constantin Aniculaesei Thanh Ha Samuel Yoffe Lance Labun Stephen Milton edward McCary Michael M.Spinks Hernan J.Quevedo Ou Z.Labun Ritwik Sain Andrea Hannasch Rafal Zgadzaj Isabella Pagano Jose A.Franco-Altamirano Martin L.Ringuette erhart Gaul Scott V.Luedtke Ganesh Tiwari Bernhard ersfeld enrico Brunetti Hartmut Ruhl Todd Ditmire Sandra Bruce Michael e.Donovan Michael C.Downer Dino A.Jaroszynski Bjorn Manuel Hegelich University of Texas at Austin AustinTexas 78712USA SUPA Department of Physics University of StrathclydeGlasgowScotland G4 ONGUnited Kingdom Tau Systems Inc.AustinTexas 78701USA Lawrence Livermore National Laboratory LivermoreCalifornia 94550USA los Alamos National Laboratory Los AlamosNew Mexico 87545USA Brookhaven National Laboratory UptonNew York 11973USA Ludwig-Maximilians-Universität MunichGermany

An intense laser pulse focused onto a plasma can excite nonlinear plasma *** appropriate conditions,electrons from the background plasma are trapped in the plasma wave and accelerated to ultra-relativistic *** scheme is called a laser wakefield *** this work,we present results from a laser wakefield acceleration experiment using a petawatt-class laser to excite the wakefields as well as nanoparticles to assist the injection of electrons into the accelerating phase of the *** find that a 10-cm-long,nanoparticle-assisted laser wakefield accelerator can generate 340 pC,10±1.86 GeV electron bunches with a 3.4 GeV rms convolved energy spread and a 0.9 mrad rms *** can also produce bunches with lower energies in the 4–6 GeV range.

关键词： acceleration nanoparticle charge

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Privacy-Preserving Strategyproof Auction Mechanisms for Resource Allocation

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Tsinghua Science and Technology 2017年第2期22卷 119-134页

作者： Yu-e Sun He Huang Xiang-Yang Li Yang Du Miaomiao Tian Hongli Xu Mingjun Xiao School of Urban Rail Transportation Soochow University School of Computer Science and Technology Soochow University School of Computer Science and Technology University of Science and Technology of China Suzhou Institute for Advanced Study University of Science and Technology of China School of Computer Science and Technology Anhui University

In recent years, auction theory has been extensively studied and many state-of-the-art solutions have been proposed aiming at allocating scarce resources. However, most of these studies assume that the auctioneer is always trustworthy in the sealed-bid auctions, which is not always true in a more realistic scenario. Besides the privacy-preserving issue, the performance guarantee of social efficiency maximization is also crucial for auction mechanism design. In this paper, we study the auction mechanisms that consider the above two aspects. We discuss two multi-unit auction models： the identical multiple-items auction and the distinct multiple-items *** the problem of determining a multi-unit auction mechanism that can maximize its social efficiency is NPhard, we design a series of nearly optimal multi-unit auction mechanisms for the proposed models. We prove that the proposed auction mechanisms are strategyproof. Moreover, we also prove that the privacy of bid value from each bidder can be preserved in the auction mechanisms. To the best of our knowledge, this is the first work on the strategyproof multi-unit auction mechanisms that simultaneously consider privacy preservation and social efficiency maximization. The extensive simulations show that the proposed mechanisms have low computation and communication overheads.

关键词： approximation mechanism multi-unit auction privacy preserving social efficiency strategyproof

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Treatment of copper-rich gold ore by cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching

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Transactions of Nonferrous Metals Society of China 2015年第2期25卷 597-607页

作者： A.D.BAS e.KOC Y.e.YAZICI H.DeVeCI Hydromet-B&PM Group Division of Mineral & Coal Processing Department of Mining EngineeringKaradeniz Technical University

The treatment of a copper sulphide-bearing gold ore by direct cyanide leaching, ammonia pretreatment and ammoniacal cyanide leaching was investigated. Dissolution behaviour of gold and copper in these leaching systems was demonstrated. Severe interference by the copper containing sulphides with cyanide leaching of gold is observed at p（NaCN）〈5 g/L. This is consistent with speciation calculations. Ammonia pretreatment is shown to readily eliminate the copper interference, allowing almost complete extraction of gold with concomitantly low reagent consumption in subsequent cyanide leaching. In ammoniacal cyanide system, Box-Behnken experimental design shows the main and interaction effects of NH3, NaCN and Pb（NO3）2. The concentrations of NH3 and NaCN are statistically confirmed to be significant factors affecting extraction of gold while the effect of Pb（NO3）2 is limited. Increasing the concentration of NH3 improves the selectivity and extent of gold extraction and reduces the cyanide consumption. The contribution of reagent interactions to gold extraction is statistically insignificant. These findings highlight that ammonia pretreatment and ammonia-cyanide leaching are promising approaches for the treatment of gold ores with high copper sulphide content.

关键词： copper-gold ores ammoniacal cyanide leaching ammonia leaching pretreatment cyanide leaching

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Cold stratification,temperature,light,GA3,and KNO3 effects on seed germination of Primula beesiana from Yunnan,China

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Plant Diversity 2020年第3期42卷 168-173页

作者： Li-e Yang De-Li Peng Zhi-Min Li Li Huang Juan Yang Hang Sun School of Tourism and Geography Yunnan Normal UniversityKunming650500YunnanChina School of Life Science Yunnan Normal UniversityKunming650500YunnanChina Key Laboratory for Plant Diversity and Biogeography of east Asia Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina National Germplasm Bank of Wild Species Kunming Institute of BotanyChinese Academy of SciencesKunming650201YunnanChina

Primula beesiana *** an attractive wildflower endemically distributed in the wet habitats of subalpine/alpine regions of southwestern *** study is an attempt to understand how this plant adapts to wet habitats and high ***,we examined the effects of cold stratification,light,GA3,KNO3,and temperature on *** seed ***3 and GA3 increased germination percentage and germination rate compared to control treatments at 15/5 and 25/15℃.Untreated seeds germinated well(>80%)at higher temperatures(20,25 and 28℃),whereas at lower(5,10 and15℃)and extremely high temperatures(30 and 32℃)germination decreased ***,after cold stratification(4-16 weeks),the germination percentage of *** seeds at low temperatures(5-15℃)and the germination rate at high temperatures(30℃)increased significantly,suggesting that *** has type 3 non-deep physiological *** base temperature and thermal time for germination decreased in seeds that were cold stratified for 16 ***-stratified seeds incubated at fluctuating temperatures(especially at 15/5℃)had significantly high germination percentages and germination rates in light,but not in dark,compared to the corresponding constant temperature(10℃).Seeds had a strict light requirement at all temperatures,even after experiencing cold stratification;however,the combinations of cold stratification and fluctuating temperature increased germination when seeds were transferred from dark to *** dormancy/germination responses to light and temperature are likely mechanisms that ensure germination occurs only in spring and at/near the soil surface,thus avoiding seedling death by freezing,inundation and/or germination deep in the soil.

关键词： Alpine plant Fluctuating temperature Germination ecology Light requirement Seed dormancy

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PI3K/Akt pathway is involved in the activation of RAW 264.7 cells induced by hydroxypropyltrimethyl ammonium chloride chitosan

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Journal of Oceanology and Limnology 2020年第3期38卷 834-840页

作者： YANG Yue XING Rong’e LIU Song QIN Yukun LI Kecheng YU Huahua LI Pengcheng Key Laboratory of experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology Qingdao 266237China University of Chinese Academy of Sciences Beijing 100049China

We previously demonstrated that 2-hydroxypropyltrimethyl ammonium chloride chitosan(HACC)promoted the production of nitric oxide(NO)and proinflammatory cytokines by activating the mitogen-activated protein kinases(MAPK)and Janus kinase(JAK)/STAT pathways in RAW 264.7 cells,indicating good immunomodulatory activity of *** this study,to further investigate the immunomodulatory mechanisms of HACC,we determined the roles of phosphatidylinositol 3-kinase(PI3K)/Akt,activating protein(AP-1)and nuclear factor kappa B(NF-κB)in HACC-induced activation of RAW 264.7 cells by the western *** results suggest that HACC promoted the phosphorylation of p85 and ***,c-Jun and p65 were also increased after the treatment of RAW 264.7 cells with HACC,indicating the translocation of NF-κB and AP-1 from cytoplasm to *** addition,as scanning electron microscopy(SeM)analysis shows,the cell morphology changed after HACC *** findings indicate that HACC activated MAPK,JAK/STAT,and PI3K/Akt signaling pathways dependent on AP-1 and NF-κB activation in RAW 264.7 cells,ultimately leading to the increase of NO and cytokines.

关键词： hydroxypropyltrimethyl ammonium chloride chitosan RAW 264.7 cells PI3K/Akt pathway nuclear factor-κB activating protein 1

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Uptake, Distribution and Accumulation of Copper in Two ecotypes of elsholtzia

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Pedosphere 2003年第4期13卷 359-366页

作者： JIANGLi-Ying YANGXiao-e YeZheng-Qian SHIWei-Yong CollegeofenvironmentalandResourcesSciences ZhejiangUniversityHuajiachiCampusHangzhou310029China CollegeofBiologicalandenvironmentalengineering ZhejiangUniversityofTechnologyHangzhou310034China

Two ecotypes of elsholtzia, elsholtzia splendens and e. argyi, are dominantplants growing on Cu and Pb-Zn smelters, respectively. Samples of the two ecotypes and thecorresponding soils from fields of a copper mining area and a Pb-Zn mining area ofZhejiang Province,China, were analyzed to investigate Cu or Zn tolerance of these two ecotypes. effects of nine Culevels (0, 5, 10, 20, 40, 80, 160, 240 and 320 mg Cu L^(-1) as CuSO_4 centre dot 5H_O) on growth anduptake, translocation and accumulation of Cu in these two ecotypes were examined in a solutionculture experiment. The experimental results showed that dry weights (DW) of shoots and roots weredepressed, and growth of e. splendens was less depressed than that of e. argyi when treated with>= 5mg Cu L^(-1). Concentrations of Cu in shoots of e. splendens and e. argyi exceeded 1000 mg kg^(-1)DW at >= 40 mg Cu L^(-1). The maximum Cu accumulated in the shoots of Cu-treated e. splendens and *** reached 101 and 142 mu g plant^(-1). Furthermore, analysis of plant samples from the fieldsshowed that these two ecotypes can tolerant excess heavy metals and produced high dry matter, and *** can accumulate 11.7 mg Cu plant^(-1) grown on the Cu smelter. Therefore, e. splendens *** could be good plants for phytoremediation.

关键词： copper elsholtzia argyi elsholtzia splendens

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