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Beyond habitat structure: Landscape heterogeneity explains the monito del monte (Dromiciops gliroides) occurrence and behavior at habitats dominated by exotic trees

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Integrative Zoology 2016年第5期11卷 413-421页

作者： Daniela A.SALAZAR Francisco e.FONTÚRBeL Departamento de Ciencias ecológicas Facultad de CienciasUniversidad de ChileSantiagoChile Instituto de Biología Facultad de CienciasPontificia Universidad Católica de ValparaísoValparaísoChile

Habitat structure determines species occurrence and ***,human activities are altering natural habitat structure,potentially hampering native species due to the loss of nesting cavities,shelter or movement *** South American temperate rainforest is experiencing an accelerated loss and degradation,compromising the persistence of many native species,and particularly of the monito del monte(Dromiciops gliroides Thomas,1894),an arboreal marsupial that plays a key role as seed *** to compare 2 contrasting habitats(a native forest and a transformed habitat composed of abandoned eucalyptus plantations and native understory vegetation),we assessed ***’occurrence using camera traps and measured several structural features(*** and bamboo cover,deadwood presence,moss abundance)at 100 camera ***plementarily,we used radio telemetry to assess its spatial ecology,aiming to depict a more complete *** abundance was the only significant variable explaining *** occurrence between habitats,and no structural variable explained its occurrence at the transformed *** were no differences in home range,core area or inter-individual *** the transformed habitats,tracked individuals used native and eucalyptus-associated vegetation types according to their *** locations(and,hence,nesting sites)were located exclusively in native *** landscape heterogeneity resulting from the vicinity of native and eucalyptus-associated vegetation likely explains *** occurrence better than the habitat structure itself,as it may be use eucalyptus-associated vegetation for feeding purposes but depend on native vegetation for nesting.

关键词： behavior fleshy fruits southern Chile spatial ecology temperate rainforest

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The radial evolution of earthward BBFs during substorm

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Science China earth Sciences 2010年第10期53卷 1542-1551页

作者： ReMe H DANDOURAS I LUCeK e DUNLOP M Centre d'etude Spatiale des Rayonnements Blackett Laboratory Imperial College London Rutherford Appleton Laboratory

We here study the occurrence rate,probability function of velocity and duration of earthward bursty bulk flows(BBFs) in the Inner Plasma Sheet(IPS,β>0.5) using the data of Cluster in 2001 and *** occurrence rate of earthward BBFs increases with distance from the earth up to ?19 Re,which is in agreement with the previous observations of the radial evolution of *** 54% of earthward BBFs in expansion phase have a velocity larger than 600 km/s,whereas only 38% of earthward BBFs in growth and recovery phases have a velocity larger than 600 km/*** average velocity of earthward BBFs in expansion phase is 732 km/s,larger than those in growth phase(631 km/s) and recovery phase(617 km/s).The durations of earthward BBFs decrease with the decrease of downtail distance from earth due to the braking of earthward *** duration of earthward BBFs in expansion phase is larger than that in growth and recovery *** average durations in growth,expansion,and recovery phases are respectively 49.3,71.5,and 47.6 ***,the ratios of transports of energy of earthward BBFs in growth,expansion,and recovery phases can be estimated to be 0.51:1:***,the earthward BBFs in the expansion phase have the largest capability of the transport of energy and can produce the largest braking effects,such as inertial currents and auroral activities.

关键词： substorm growth expansion recovery duration energy transport

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A general-purpose framework for parallel processing of large-scale LiDAR data

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International Journal of Digital earth 2018年第1期11卷 26-47页

作者： Zhenlong Li Michael e.Hodgson Wenwen Li Department of Geography University of South CarolinaColumbiaSCUSA School of Geographical Sciences and Urban Planning Arizona State UniversityTempeAZUSA

Light detection and ranging(LiDAR)data are essential for scientific discoveries such as earth and ecological sciences,environmental applications,and responding to natural *** collecting LiDAR data over large areas is quite possible the subsequent processing steps typically involve large computational *** storing,managing,and processing LiDAR data are the prerequisite steps for enabling these LiDAR-based ***,handling LiDAR data poses grand geoprocessing challenges due to data and computational *** tackle such challenges,we developed a general-purpose scalable framework coupled with a sophisticated data decomposition and parallelization strategy to efficiently handle‘big’LiDAR data *** contributions of this research were(1)a tile-based spatial index to manage big LiDAR data in the scalable and fault-tolerable Hadoop distributed file system,(2)two spatial decomposition techniques to enable efficient parallelization of different types of LiDAR processing tasks,and(3)by coupling existing LiDAR processing tools with Hadoop,a variety of LiDAR data processing tasks can be conducted in parallel in a highly scalable distributed computing environment using an online geoprocessing application.A proof-of-concept prototype is presented here to demonstrate the feasibility,performance,and scalability of the proposed framework.

关键词： Big data online geoprocessing Hadoop MapReduce spatial decomposition LAStools parallel

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The Janus of macrophysiology： stronger effects of evolutionary history, but weaker effects of climate on upper thermal limits are reversed for lower thermal limits in ants

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Current Zoology 2018年第2期64卷 223-230页

作者： Sarah e. DIAMOND Lacy D. CHICK Department of Biology Case Western Reserve University Cleveland OH 44106 USA

Species may exhibit similar traits via different mechanisms： environmental filtering and local adaptation （geography） and shared evolutionary history （phylogeny） can each contribute to the resemblance of traits among species. Parsing trait variation into geographic and phylogenetic sources is important, as each suggests different constraints on trait evolution. Here, we explore how phylogenetic distance, geographic distance, and geographic variation in climate shape physiological tolerance of high and low temperatures using a global dataset of ant thermal tolerances. We found generally strong roles for evolutionary history and geographic variation in temperature, but essen- tially no detectable effects of spatial proximity per se on either upper or lower thermal tolerance. When we compared the relative importance of the factors shaping upper and lower tolerances, we found a much stronger role for evolutionary history in shaping upper versus lower tolerance, and a moderately weaker role for geographic variation in temperature in shaping upper tolerance when compared with lower tolerance. Our results demonstrate how geographic variation in climate and evolutionary history may have differential effects on the upper and lower endpoints of physiological tolerance. This Janus effect, where the relative contributions of geographic variation in climate and evolutionary history are reversed for lower versus upper physiological tolerances, has gained some support in the literature, and our results for ant physiological tolerances provide further evidence of this pa^ern. As the climate continues to change, the high phylogenetic conservatism of upper tolerance may suggest potential constraints on the evolution of tolerance of high temperatures.

关键词： biogeography evolutionary history latitudinal cline macrophysiology temperature thermal tolerance.

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FReQUeNCY ReSPONSe ANALYSIS IN INTeRNAL FLOWS

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Journal of Hydrodynamics 1995年第3期7卷 39-49页

作者： Zhang, Lixiang Tijsseling, A.S. vardy, A.e. Yunnan Polytechnic Univ Kunming China

Frequency response analysis of the liquid-filled pipeline is an important way to obtain the dynamic behavior of piping systems subjected to internal/external excitations. This study applies Laplace transform to hyperbolic partial differential equations which describes the axial motion taking into account Fluid Structure Interaction (FSI). An effective and convenient method to tackle frequency analysis and to pick up resonance frequencies of the system was developed, four wave modes in the frequency domain being used in combination of solution. The efficiency of this method is well proved with the examples.

关键词： Frequency response Laplace transforms Numerical analysis Pipe flow Water hammer

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Genome-Wide Survey and expression Analysis of P_(1B)-ATPases in Rice, Maize and Sorghum

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Rice science 2018年第4期25卷 208-217页

作者： e Zhiguo LI Tingting CHeN Chen WANG Lei Key Laboratory of Rice Biology China National Rice Research Institute Key Laboratory of Plant Functional Genomics Ministry of Education/Key Laboratory of Crop Genetics and Physiology of Jiangsu Province/College of Agriculture Yangzhou University

P1B-type ATPase ion pumps that transport heavy metal ions across cellular membranes are essential for plant growth and development. To date, a genomic comparison overview of the family in rice, maize and sorghum is not yet available. In this study, a total of 31 heavy metal P1B-type ATPase （HMA） genes were identified, including 9 in rice, 11 each from maize and sorghum. They were classified into two distinct subfamilies based on their sequence composition and phylogenetic relationship. Four pairs of HMA genes were expanded via gene duplication with tandemly duplicated. Comprehensive analyses were performed to investigate the expression profiles of HMA genes in various tissues by using quantitative real-time PCR. Some HMA members exhibited abundant and tissue-specific expression patterns. Moreover, most of the genes were found to be differentially expressed under the Cu/Cd treatment. This study will facilitate further studies on P1B-type ATPase family and provide valuable hints for the functional validation in rice, maize and sorghum.

关键词： P1B-type ATPase rice maize sorghum HMA gene family expression pattern analysis

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The role of p53 in developmental syndromes

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Journal of Molecular Cell Biology 2019年第3期11卷 200-211页

作者： Margot e.Bowen Laura D.Attardi Division of Radiation and Cancer Biology in the Department of Radiation Oncology Stanford University School of MedicineStanfordCA 94305USA Department of Genetics Stanford University School of MedicineStanfordCA 94305USA

While it is well appreciated that loss of the p53 tumor suppressor protein promotes cancer,growing evidence indicates that increased p53 activity underlies the developmental defects in a wide range of genetic *** inherited or de novo mutations that cause these syndromes affect diverse cellular processes,such as ribosome biogenesis,DNA repair,and centriole duplication,and analysis of human patient samples and mouse models demonstrates that disrupting these cellular processes can activate the p53 ***,many of the developmental defects in mouse models of these syndromes can be rescued by loss of p53,indicating that inappropriate p53 activation directly contributes to their pathogenesis.A role for p53 in driving developmental defects is further supported by the observation that mouse strains with broad p53 hyperactivation,due to mutations affecting p53 pathway components,display a host of tissue-specific developmental defects,including hematopoietic,neuronal,craniofacial,cardiovascular,and pigmentation ***,germline activating mutations in TP53 were recently identified in two human patients exhibiting bone marrow failure and other developmental *** in mice suggest that p53 drives developmental defects by inducing apoptosis,restraining proliferation,or modulating other developmental programs in a cell type-dependent ***,we review the growing body of evidence from mouse models that implicates p53 as a driver of tissue-specific developmental defects in diverse genetic syndromes.

关键词： p53 Mdm2 development embryo congenital defect syndrome genetic disorder

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Characteristic evaluation on spray-deposited WFTO thin films as a function of W doping ratio

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Rare Metals 2014年第4期33卷 433-441页

作者： G.Turgut e.F.Keskenler S.Aydin D.Tatar e.Sonmez S.Dogan B.Duzgun Department of Physics education Kazim Karabekir Education FacultyAtatürk University Department of Nanotechnology Faculty of EngineeringRecep Tayyip Erdogan University Department of electrical and electronics engineering Faculty of Engineering and ArchitectureBalikesir University

Abstract In this work, F and F ＋ W simultaneously doped SnO2 highly transparent conducting thin films were depos- ited on glass substrates at （500 4± 5） ℃ temperature by the spray pyrolysis method. Microstructural, morphological, electrical and optical properties of FrO films were investi- gated as a function of tungsten （W） doping, in the range from 0 to 5 at%. X-ray diffraction patterns show that the films exhibit a tetragonal cassiterite structure and （200） preferen- tial orientation of FTO film, and the relative strength of these peaks changes with altering the W doping ratio. The pre- ferred growth of （211） changed to （200） plane with 2 at% W doping level and 3 at% W-doped film had （200） orientation and with further doping, this changed to （110） orientation. The scanning electron microscopy and atomic force microscopy images of the films indicate that the films are made up of dense small particles of a pyramidal shape and have a smooth surface. It was observed that the surface morphology of the films did not change much when the W element was inserted to the FrO structure. It was found that the sheet resistance values of the films varied with W doping ratio, and 2 at% W-doped FTO thin film exhibited the lowest values of sheet resistance （1.12Ω）. Also, the highest figure of merit, infrared reflectivity and optical band gap values werecalculated for 2 at% W-doped FTO film as 50.9× 10-2 Ω-1, 98.82 % and 4.13 ev, respectively. These results make the films an effective candidate for usage in many optoelectronic applications and photo-thermal conversion of solar energy.

关键词： WFTO FrO Spray pyrolysis Thin films Lattices

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COvID-19 Automatic Detection Using Deep Learning

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Computer Systems Science & engineering 2021年第10期39卷 15-35页

作者： Yousef Sanajalwe Mohammed Anbar Salam Al-e’mari National Advanced IPv6 Centre of excellence(Nav6) Universiti Sains Malaysia11800 USMPenangMalaysia Computer Science Department Northern Border University(NBU)9280 NBUAr’arthe Kingdom of Saudi Arabia

The novel coronavirus disease 2019(COvID-19)is a pandemic disease that is currently affecting over 200 countries around the world and impacting billions of *** first step to mitigate and control its spread is to identify and isolate the infected ***,because of the lack of reverse transcription polymerase chain reaction(RT-CPR)tests,it is important to discover suspected COvID-19 cases as early as possible,such as by scan analysis and chest X-ray by ***,chest X-ray analysis is relatively time-consuming since it requires more than 15 minutes per *** this paper,an automated novel detection model of COvID-19 cases is proposed to perform real-time detection of COvID-19 *** proposed model consists of three main stages:image segmentation using Harris Hawks optimizer,synthetic image augmentation using an enhanced Wasserstein And Auxiliary Classifier Generative Adversarial Network,and image classification using Conventional Neural *** chest X-ray images datasets are used to train and test the proposed *** demonstrate that the proposed model is very efficient in the automatic detection of COvID-19 positive *** achieved 99.4%accuracy,99.15%precision,99.35%recall,99.25%F-measure,and 98.5%specificity.

关键词： Conventional neural network COvID-19 deep learning enhanced Wasserstein and auxiliary classifier generative adversarial network image classification image segmentation chest x-rays

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Segmental closure of the Mongol-Okhotsk Ocean:Insight from detrital geochronology in the east Transbaikalia Basin

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Geoscience Frontiers 2022年第1期13卷 15-27页

作者： Anastasia v.Arzhannikova elena I.Demonterova Marc Jolivet ekaterina A.Mikheeva Alexei v.Ivanov Sergey G.Arzhannikov valentin B.Khubanov vadim S.Kamenetsky Institute of the earth’s Crust Russian Academy of SciencesSiberian BranchIrkutskRussia Laboratoire Géosciences Rennes CNRS-UMR6118Universitéde RennesRennesFrance Geological Institute Russian Academy of SciencesSiberian BranchUlan-UdeRussia

The Late Paleozoic–early Mesozoic Mongol-Okhotsk Ocean extended between the Siberian and Amur–North China *** timing and modalities of the oceanic closure are widely *** is largely accepted that the ocean closed in a scissor-like manner from southwest to northeast(in modern coordinates),though the timing of this process remains *** studies have shown that both western(West Transbaikalia)and eastern(Dzhagda)parts of the ocean closed almost simultaneously at the early–Middle Jurassic ***,little information on the key central part of the oceanic suture zone is *** performed U-Pb(LA-ICP-MS)dating of detrital zircon from wellcharacterized stratigraphic sections of the central part of the Mongol-Okhotsk suture *** include the initial marine and final continental sequences of the east Transbaikalia Basin,deposited on the northern Argun-Idemeg terrane *** provide new stratigraphic ages for the marine and continental *** revised chronostratigraphy allows assigning an age of~165–155 Ma,to the collisionrelated flexure of the northern Argun-Idemeg terrane and the development of a peripheral foreland *** collisional process took place 5 to10 million years later than in the western and eastern parts of the *** demonstrate that the northern Argun-Idemeg terrane was the last block to collide with the Siberian continent,challenging the widely supported scissor-like model of closure of the MongolOkhotsk *** segments of the ocean closed independently,depending on the initial shape of the paleo continental margins.

关键词： Detrital zircon U-Pb geochronology Mongol-Okhotsk collision east Transbaikalian Basin

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