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Dispersal syndrome and landscape fragmentation in the salt-marsh specialist spider Erigone longipalpis

Current Zoology 2023年第1期69卷 21-31页

作者： Maxime Dahirel Marie Wullschleger tristan Berry Solène Croci Julien Pétillon Univ Rennes UR1CNRSEcosystèmesBiodiversitéÉvolution(ECOBIO)UMR 6553F-35000 RennesFrance Department of Biology Ghent UniversityB-9000 GhentBelgium Syndicat Mixte de Gestion des Milieux Naturels Réserve Naturelle Nationale de l’Étang NoirF-40510 SeignosseFrance CNRS Universitéde Rennes 2EPHE-PSLUniversitéd’AngersUniversitéde Bretagne OccidentaleUniversitéde Caen NormandieUniversitéde NantesUMR LETGF-35043 RennesFrance Institute for Coastal and Marine Research Nelson Mandela UniversityPort Elizabeth 6031South Africa

Dispersal and its evolution play a key role for population persistence in fragmented landscapes where habitat loss and fragmentation increase the cost of between-habitat *** such contexts,it is important to know how variation in dispersal and other traits is structured,and whether responses to landscape fragmentation are aligned with underlying dispersal-trait correlations,or dispersal ***,therefore,studied trait variation in Erigone longipalpis,a European spider species specialist of(often patchy)salt *** collected spiders in two salt-marsh landscapes differing in habitat *** then reared lab-born spiders for two generations in controlled conditions,and measured dispersal and its association with various key *** longipalpis population densities were lower in the more fragmented *** this,we found no evidence of differences in dispersal,or any other trait we studied,between the two *** a dispersal syndrome was present at the among-individual level(dispersers were more fecund and faster growing,among others),there was no indication it was genetically driven:among-family differences in dispersal were not correlated with differences in other ***,we showed that the observed phenotypic covariations were mostly due to within-family *** hypothesize that the dispersal syndrome is the result of asymmetric food access among siblings,leading to variation in development rates and carrying over to adult *** results show we need to better understand the sources of dispersal variation and syndromes,especially when dispersal may evolve rapidly in response to environmental change.

关键词： context-dependent dispersal habitat loss Linyphiidae phenotypic correlations population density

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Local grid refinement in multigrid method for point contact problems of polycrystalline anisotropic material under dry and lubricated conditions

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Friction 2022年第12期10卷 2086-2110页

作者： Binbin ZHANG tristan G.VLOGMAN Predrag ANDRIC Ton C.BOR Cornelis H.VENNER Faculty of Engineering Technology University of TwenteEnschede 7500AEthe Netherlands SKF Research and Technology Development Houten 3992AEthe Netherlands

Predicting rolling bearing fatigue life requires knowledge of the three-dimensional(3D)stress fields in the roller and raceway near the lubricated *** to the increasingly severe operating conditions,the effect of localized features such as surface roughness,subsurface inclusions,and even the crystallographic structure of the material becomes *** such detail requires(locally)extremely dense gridding in simulations,which in 3D is a major *** techniques have been demonstrated to be capable of solving such *** this study,multigrid techniques are shown to further increase the efficiency of the solution by exploiting local grid refinement while maintaining the simplicity of a uniform *** is achieved by employing increasingly finer grids only locally,where the highest resolution is *** are presented for dry contact and elastohydrodynamically lubricated contact cases,circular as well as elliptic,with varying crystallographic structure,and with surface *** results show that the developed algorithm is very well suited for detailed analysis,with also excellent prospects for computational diagnostics involving actual material crystallographic structure from electron backscatter diffraction measurements.

关键词： local grid refinement multigrid method polycrystalline anisotropic material dry and lubricated contact

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Pediatric interfacility transport effects on mortality and length of stay

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World Journal of Pediatrics 2021年第4期17卷 400-408页

作者： Rod M.Shinozaki Andreas Schwingshackl Neeraj Srivastava tristan Grogan Robert B.Kelly David Geffen School of Medicine at UCLA Los AngelesCAUSA University of California IrvineIrvineCAUSA Children’s Hospital of Orange County 1201 West La Veta AvenueOrangeCA92868USA

Background We aimed to evaluate the effects of interfacility pediatric critical care transport response time,physician presence during transport,and mode of transport on mortality and length of stay(LOS)among pediatric *** hypothesized that a shorter response time and helicopter transports,but not physician presence,are associated with lower mortality and a shorter *** Retrospective,single-center,cohort study of 841 patients(<19 years)transported to a quaternary pediatric intensive care unit and cardiovascular intensive care unit between 2014 and 2018 utilizing patient charts and transport *** linear and logistic regression analyses adjusted for age,diagnosis,mode of transport,response time,stabilization time,return duration,mortality risk(pediatric index of mortality-2 and pediatric risk of mortality-3),and inotrope,vasopressor,or mechanical ventilation presence on *** Four hundred and twenty-eight(50.9%)patients were transported by helicopter,and 413(49.1%)were transported by *** accompanied 239(28.4%)*** median response time was 2.0(interquartile range 1.4–2.9)*** physician presence increased the median response time by 0.26 hours(P=0.020),neither physician presence nor response time significantly affected mortality,ICU length of stay(ILOS)or hospital length of stay(HLOS).Helicopter transports were not significantly associated with mortality or ILOS,but were associated with a longer HLOS(3.24 days,95%confidence interval 0.59–5.90)than ambulance transports(P=0.017).Conclusions These results suggest response time and physician presence do not significantly affect mortality or *** may reflect the quality of pre-transport care and medical control *** transports were only associated with a longer *** analysis provides a framework for examining transport workforce needs and associated costs.

关键词： Helicopter Hospital length of stay Pediatric critical care Pediatric intensive care unit Transport medicine

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Manipulating Bloch surface waves in 2D: a platform concept-based flat lens

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Light(Science & Applications) 2014年第1期3卷 370-376页

作者： Libo Yu Elsie Barakat tristan Sfez Lubos Hvozdara Joab Di Francesco Hans Peter Herzig Optics&Phatonics Technology Laboratory(OPT) Ecole Polytechinique Federale de Lausanne(EPFL)CH-2000 NeuchatelSwitzerland

At the end of the 1970s,it was confirmed that dielectric multilayers can sustain Bloch surface waves(BSWs).However,BSWs were not widely studied until more *** advantage of their high-quality factor,sensing applications have focused on *** far,no work has been performed to manipulate and control the natural surface propagations in terms of defined functions with two-dimensional(2D)components,targeting the realization of a 2D *** this study,we demonstrate that 2D photonic components can be implemented by coating an in-plane shaped ultrathin(l/15)polymer layer on the dielectric *** presence of the polymer modifies the local effective refractive index,enabling direct manipulation of the *** locally shaping the geometries of the 2D components,the BSW can be deflected,diffracted,focused and coupled with 2D *** BSW manipulation in 2D,the dielectric multilayer can play a new role as a robust platform for 2D optics,which can pave the way for integration in photonic *** near-field measurements are used to study light propagation through micro-and nano-optical *** demonstrate that a lens-shaped polymer layer can be considered as a 2D component based on the agreement between near-field measurements and theoretical *** the focal shift and the resolution of a 2D BSW lens are measured for the first *** proposed platform enables the design of 2D all-optical integrated systems,which have numerous potential applications,including molecular sensing and photonic circuits.

关键词： Bloch surface wave 2D optics manipulation micro-and nano-optics nanophotonics platform

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Differential regulation of basal expression of inflammatory genes by NF-κB family subunits

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Cellular & Molecular Immunology 2019年第8期16卷 720-723页

作者： tristan J.de Jesús Joshua T.Centore Parameswaran Ramakrishnan Department of Pathology School of MedicineCase Western Reserve UniversityClevelandOH 44106USA Department of Biochemistry School of MedicineCase Western Reserve UniversityClevelandOH 44106USA The Case Comprehensive Cancer Center School of MedicineCase Western Reserve UniversityClevelandOH 44106USA

The nuclear factor kappaB(NF-κB)family of transcription factors regulates immune and inflammatory responses and controls cell survival,proliferation,differentiation,and apoptosis.1 The five subunits of the NF-κB family,(RelA,RelB,c-Rel,p105/p50,and p100/p52),are categorized as activating(RelA,RelB,and c-Rel),or inhibitory(p105/p50 and p100/p52),based on the presence or absence of the transactivation domain and form homo-and ***-dependent activation of NF-κB,either by the classical pathway involving the degradation of the inhibitor of NF-κB(IκB)or by the alternative pathway involving the partial degradation of p100 to p52 and formation of the p52/RelB dimer,has emerged as a central theme in the regulation of NF-κBdependent genes.2–4 However,in Sertoli cells and some neurons,lymphocytes,and malignant cells,NF-κB has been shown to be constitutively active in the nucleus5,6(***/nf-kb).Moreover,several recent studies have also identified disease-associated mutations in the NF-κB subunits that affect their expression level and transcriptional activity.2,7 Our understanding of the ways in which the changes in the basal level of NF-κB affect the subsequent basal regulation of the expression of NF-κBdependent genes remain poorly defined.

关键词： inflammatory constitutive subsequent

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Coarse and fine-tuning of lasing transverse electromagnetic modes in coupled all-inorganic perovskite quantum dots

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Nano Research 2021年第1期14卷 108-113页

作者： Youngsin Park Guanhua Ying Atanu Jana Vitaly Osokin Claudius C.Kocher tristan Farrow Robert A.Taylor Kwang S.Kim School of Natural Science Ulsan National Institute of Science and TechnologhUlsan 44919Republic of Korea Clarendon Laboratory Department of PhysicsUniversity of OxfordParks RoadOxford OX13PUUK Centre for Quantum Technologies National University of SingaporeScience Drive 2Singapore 117543Singapore

Inorganic perovskite lasers are of particular interest,with much recent work focusing on Fabry-P6rot cavity-forming *** demonstrate the direct observation of lasing from transverse electromagnetic(TEM)modes with a long coherence time-9.5ps in coupled CsPbBr_(3) quantum dots,which dispense with an external cavity resonator and show how the wavelength of the modes can be controlled via two independent *** the pump power allowed us tofine-tune the TEM mode structure to the emission wavelength,thus providing a degree of control over the properties of the lasing *** temperature-tuning provided an additional degree of control over the wavelength of the lasing peak,importantly,maintained a constant full width at half maximum(FWHM)over the entire tuning range without mode-hopping.

关键词： perovskite quantum dots coherent lasing transverse electromagnetic mode stimulated emission

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On the Telegrapher’s Equation with Three Space Variables in Non-Rectangular Coordinates

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Journal of Applied Mathematics and Physics 2020年第5期8卷 910-926页

作者： tristan Guillaume Thema Research Unit CY Cergy Paris University Cergy France

This article provides a closed form solution to the telegrapher’s equation with three space variables defined on a subset of a sphere within two radii, two azimuthal angles and one polar angle. The Dirichlet problem for general boundary conditions is solved in detail, on the basis of which Neumann and Robin conditions are easily handled. The solution to the simpler problem in cylindrical coordinates is also provided. Ways to efficiently implement the formulae are explained. Minor adjustments result in solutions to the wave equation and to the heat equation on the same domain as well, since the latter are particular cases of the more general telegrapher’s equation.

关键词： Telegrapher’s Equation Spherical Coordinates Fourier-Bessel-Legendre Series Expansion Associated Legendre Functions Hyperbolic PDE Initial Boundary Value Problem

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Productive and physiological implications of top-dress addition of branched-chain amino acids and arginine on lactating sows and offspring

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Journal of Animal Science and Biotechnology 2023年第3期14卷 1080-1101页

作者： Diana Luise Federico Correa Claudio Stefanelli Aude Simongiovanni tristan Chalvon-Demersay Maddalena Zini Luciano Fusco Paolo Bosi Paolo Trevisi Department of Agricultural and Food Sciences University of Bologna40127 BolognaItaly Department for Life Quality Studies Alma Mater StudiorumUniversity of Bologna47921 RiminiItaly Metex Noovistago 32 Rue Guersant75017 ParisFrance Department of Biomedical and Neuromotor Sciences Alma Mater StudiorumUniversity of Bologna40126 BolognaItaly Freelancer Reggio nell’EmiliaItaly.

Background Branched-chain amino acids(BCAAs),including L-leucine(L-Leu),L-isoleucine(L-Ile),L-valine(L-Val),and L-arginine(L-Arg),play a crucial role in mammary gland development,secretion of milk and regulation of the catabolic state and immune response of lactating ***,it has recently been suggested that free amino acids(AAs)can also act as microbial *** study aimed at evaluating whether the supplementation of lactating sows with BCAAs(9,4.5 and 9 g/d/sow of L-Val,L-Ile and L-Leu,respectively)and/or L-Arg(22.5 g/d/sow),above the estimated nutritional requirement,could influence the physiological and immunological parameters,microbial profile,colostrum and milk composition and performance of sows and their *** At d 41,piglets born from the sows supplemented with the AAs were heavier(P=0.03).The BCAAs increased glucose and prolactin(P<0.05)in the sows’serum at d 27,tended to increase immunoglobulin A(IgA)and IgM in the colostrum(P=0.06),increased the IgA(P=0.004)in the milk at d 20 and tended to increase lymphocyte%in the sows’blood at d 27(P=0.07).Furthermore,the BCAAs tended to reduce the Chao1 and Shannon microbial indices(P<0.10)in the sows’*** BCAA group was discriminated by Prevotellaceae_UCG-004,Erysipelatoclostridiaceae UCG-004,the Rikenellaceae_RC9_gut_group and *** reduced piglet mortality pre-(d 7,d 14)and post-weaning(d 41)(P<0.05).Furthermore,Arg increased the IgM in the sow serum at d 10(P=0.05),glucose and prolactin(P<0.05)in the sow serum at d 27 and the monocyte percentage in the piglet blood at d 27(P=0.025)and their jejunal expression of NFKB2(P=0.035)while it reduced the expression of GPX-2(P=0.024).The faecal microbiota of the sows in Arg group was discriminated by *** combination of BCAAs and Arg tended to increase spermine at d 27(P=0.099),tended to increase the Igs(IgA and IgG,P<0.10)at d 20 in the milk,favoured the faecal colonisation of Oscillospiraceae UCG

关键词： Microbiota Post-weaning mortality Prolactin Sows diet

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Making Energy Efficiency Pay Off

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China International Business 2009年第11期 38-39页

作者： tristan EDMONDSON

Consider this： to produce one unit of GDP, China uses an amount of energy two-and-a-half times the world average. This places energy efficiency as a key priority for China, both in simple bottomline and environmenta... 详细信息

关键词：能源效益国内生产总值能源使用能源效率中国基础

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Thin Films of Ruthenium Phthalocyanine Complexes

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Nano Research 2009年第9期2卷 678-687页

作者： tristan Rawling Christine E.Austin Dominic Hare Philip A.Doble Hadi M.Zareie Andrew M.McDonagh Institute for Nanoscale Technology University of Technology SydneySydneyNSW 2007Australia

Four new ruthenium phthalocyanine complexes bearing axial ligands with thioacetate groups that facilitate thin fi lm formation on gold surfaces are *** tunnelling microscopy(STM)images and surface coverage data obtained by solution inductively coupled plasma mass spectrometry(ICP-MS)experiments show that peripheral and axial ligand substituents on the complexes have a signifi cant effect on their surface coverage.A laser ablation ICP-MS technique that provides information about thin films across macro-sized areas is described here for the fi rst *** the technique,the maximum surface coverage of a ruthenium phthalocyanine complex was found to occur within one minute of gold substrate immersion in the complex-containing solution.

关键词： Ruthenium phthalocyanine gold surface laser ablation

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