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In the Heart of Femtosecond Laser Induced Nanogratings: From Porous Nanoplanes to Form Birefringence

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World Journal of Nano Science and Engineering 2015年第4期5卷 115-125页

作者： R. Desmarchelier B. Poumellec F. Brisset S. Mazerat M. Lancry ICMMO UMR CNRS-UPSud 8182 Université Paris Sud (in Université Paris Saclay) Orsay France

It is demonstrated that the form birefringence related to the so-called nanogratings is quantitatively correlated to the porosity-filling factor of these nanostructures. We reveal that matters surrounding the nanopores exhibit significant refractive index decrease which is likely due to the fictive temperature increase and/or the presence of a significant amount of interstitial O2. The control of the porosity was achieved by adjusting the laser pulse energy and the number of pulses/micron i.e. the overlapping rate. Applications can be numerous in fast material processing by the production of nanoporous matter, and photonics by changing the optical properties.

关键词： Silica Glasses Nanoporous Femtosecond Laser Processing Birefringence Nanogratings

Propagation of a beam halo in accelerator test facility 2 at KEK

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Chinese Physics C 2013年第5期37卷 81-84页

作者：白莎 P. Bambade 高杰 Institute of High Energy Physics (IHEP) LAL Univ Paris-SudCNRS/IN2P3

The beam halo is a major issue for interaction region （IR） backgrounds at many colliders, for example, future linear colliders, B factories, and also it is an important problem at ATF2. In this paper, we report on the halo propagation along the ATF2 beam line with realistic apertures, the nonlinear optics influence on the increasing number of halo particles input is analyzed, and the transmitted halo particles distribution just before the last BPM is then described, the results from which will benefit the Compton recoil electrons measurement.

关键词： ATF2 beam halo Compton scattering Shintake monitor

High egg rejection rate in a Chinese population of grey-backed thrush(Turdus hortulorum)

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Zoological Research 2019年第3期40卷 226-230页

作者： Can-Chao Yang Long-Wu Wang Wei Liang ANDers Pape Moller Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life Sciences Hainan Normal University State Forestry Administration of China Key Laboratory for Biodiversity Conservation in Mountainous Areas of Southwest Karst School of Life Sciences Guizhou Normal University Ecologie Systématique Evolution Université Paris-SudCNRS Agro Paris Tech Université Paris-Saclay

Several previous studies have indicated that nest sanitation behavior is a general adaptation in altricial birds,with egg recog nition capacity evolvi ng as a specific response to in terspecific brood parasitism(IBP).However,a rece nt study suggested an alternative hypothesis,con cludi ng that con specific brood parasitism(CBP)selects for egg rejection in thrushes,with IBP as a *** the present study,we used a spectrophotometer to quantify egg coloration and egg mimicry and performed artificial parasitism experiments in the grey?backed thrush(Turdus hortulorum).We showed that individuals of this species rejected 100%of 12 foreign eggs,without IBP or CBP *** a review of previous studies,we also discuss possible explanations for the high egg rejection rate in the grey-backed thrush and suggest areas for future *** birds have evolved advaneed reproductive behavior to in crease the fitn ess of their offspring by buildi ng elaborate structures(i.e.,nests),in which they lay eggs and rear their nestlings(Hansell,2000).Bird nests not only provide a suitable place for nestling development,but also act as a concealed location for safety from ***,bird parents have evolved nest sanitation behavior to clean foreig n objects from their n ests,in eluding feces,eggshells,branches,and leaves,because they induce predation,facilitate microorganism growth,damage eggs,or hurt nestlings during brooding(Guigueno&Sealy,2012).Therefore,nest sanitation has evolved as a general behavior in altricial birds for distinguishing between egg-shaped and non-egg-shaped objects.

关键词： greybacked thrush rejection rate

Land Management Effects on Biogeochemical Functioning of Salt-Affected Paddy Soils

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Pedosphere 2008年第2期18卷 183-194页

作者： C.QUANTIN UMR 8148 IDES O.GRUNBERGER N.SUVANNANG E.BOURDON université paris-sud-CNRS Land Department Developement Office of Science for Land Developement Phaholyothin RoadChatuchak UR Solutions Maison des Sciences de l'Eau de Montpellier IRDav.E.Gendreau

Most lowlands in Northeast Thailand(Isaan region)are cultivated with rice and large areas are affected by salinity, which drastically limits rice production.A field experiment was conducted during the 2003 rainy season to explore the interactions between salinity and land management in two fields representative of two farming practices:an intensively managed plot with organic inputs and efficient water management,and one without organic matter *** measurements,including pH,Eh,electrical conductivity(EC),and soil solution chemistry,were performed at three depths, with a particular focus on Fe dynamics,inside and outside saline patches. High reducing conditions appeared after flooding particularly in plots receiving organic matter and reduction processes leading to oxide reduction and to the release of Fe and,to a lesser extend,Mn to the soil *** reduction led to the consumption of H^+ and the more the Fe reduction was,the higher the pH was,up to *** of hydroxy-green rust were likely to be at the origin of the pH *** the absence of organic amendments,high salinity prevented the establishment of the reduction processes and pH value remained around *** under high reduction conditions,the Fe concentrations in the soil solution were below commonly observed toxic values and the amended plot had better rice production yield.

关键词： field experiment pH regulation redox processes salt-affected paddy soils soil management

Brain size and urbanization in birds

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Chinese Birds 2015年第2期6卷 92-98页

作者： Anders Pape Moller Johannes Erritzoe Laboratoire d’Ecologie Systématique et EvolutionCNRS UMR 8079Universite Paris-Sud Taps Old Rectory

Background: Brain size may affect the probability of invasion of urban habitats if a relatively larger brain entails superior ability to adapt to novel environments. However, once urbanized urban environments may provide poor quality food that has negative consequences for normal brain development resulting in an excess of individuals with small ***: Here we analyze the independent effects of mean, standard deviation and skewness in brain mass for invasion of urban habitats by 108 species of birds using phylogenetic multiple regression analyses weighted by sample ***: There was no significant difference in mean brain mass between urbanized and non-urbanized species or between urban and rural populations of the same species, and mean brain mass was not significantly correlated with time since urbanization. Bird species that became urbanized had a greater standard deviation in brain mass than non-urbanized species, and the standard deviation in brain mass increased with time since urbanization. Brain mass was significantly left skewed in species that remained rural, while there was no significant skew in urbanized species. The degree of left skew was greater in urban than in rural populations of the same species, and successfully urbanized species decreased the degree of left skew with time since urbanization. This is consistent with the hypothesis that sub-optimal brain development was more common in rural habitats resulting in disproportionately many individuals with very smal ***: These findings do not support the hypothesis that large brains promote urbanization, but suggest that skewness has played a role in the initial invasion of urban habitats, and that variance and skew in brain mass have increased as species have become urbanized.

关键词： Birds Brain mass Skewness in Brain Mass Standard deviation in Brain Mass Urbanization

Broadband Vibrational Cooling of Cold Cesium Molecules： Theory and Experiments

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Chinese Journal of Chemical Physics 2009年第2期22卷 149-156页

作者： D. Sofikitis A. Fioretti S. Weber M. Viteau A. Chotia R. Horchani M. Allegrini B. Chatel D. Comparat P. Pillet Laboratoire Aimé Cotton CNRS Université Paris-Sud Bat. 505 91405 Orsay France Laboratoire Collisions Agrégats Réactivité (UMR 5589 CNRS-Université Paul Sabatier Toulouse 3) IRSAMC Toulouse France CNISM Dipartimento di Fisica Universita di Pisa Largo Pontecorvo 356127 PISA Italy

The use of a broadband, frequency shaped femtosecond laser on translationally cold cesium molecules has recently demonstrated to be a very efficient method of cooling also the vibrational degree of freedom. A sample of cold molecules, initially distributed over several vibrational levels, has thus been transfered into a single selected vibrational level of the singlet X^1∑g ground electronic state. Our method is based on repeated optical pumping by laser light with a spectrum broad enough to excite all populated vibrational levels but limited in its frequency bandwidth with a spatial light modulator. In such a way we are able to eliminate transitions from the selected level, in which molecules accumulate. In this paper we briefly report the main experimental results and then address, in a detailed way by computer simulations, the perspectives for a ＂complete＂ cooling of the molecules, including also the rotational degree of freedom. Since the pumping process strongly depends on the relative shape of the ground and excited potential curves, ro-vibrational cooling through different excited states is theoretically compared.

关键词： Cold molecule Optical pumping Pulse .shaping Ultrashort pulse Laser cooling

THE MAXIMUM AND MINIMUM DEGREES OF RANDOM BIPARTITE MULTIGRAPHS

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Acta Mathematica Scientia 2011年第3期31卷 1155-1166页

作者：陈爱莲张福基李皓 College of Mathematics and Computer Science Fuzhou university School of Mathematical Sciences Xiamen university Laboratoire de Recherche en Informatique UMR 8623 C. N. R. S.-université de paris-sud

In this paper the authors generalize the classic random bipartite graph model, and define a model of the random bipartite multigraphs as follows：let m = m（n） be a positive integer-valued function on n and ζ（n,m;{pk}） the probability space consisting of all the labeled bipartite multigraphs with two vertex sets A ={a_1,a_2,...,a_n} and B = {b_1,b_2,...,b_m}, in which the numbers t_（ai）,b_j of the edges between any two vertices a_i∈A and b_j∈ B are identically distributed independent random variables with distribution P{t_（ai）,b_j=k}=pk,k=0,1,2,...,where pk ≥0 and ∞Σk=0 pk=1. They obtain that X_（c,d,A）, the number of vertices in A with degree between c and d of G_（n,m）∈ζ（n, m;{pk}） has asymptotically Poisson distribution, and answer the following two questions about the space ζ（n,m;{pk}） with {pk} having geometric distribution, binomial distribution and Poisson distribution, respectively. Under which condition for {pk} can there be a function D（n） such that almost every random multigraph G_（n,m）∈ζ（n,m;{pk}） has maximum degree D（n）in A？ under which condition for {pk} has almost every multigraph G（n,m）∈ζ（n,m;{pk}） a unique vertex of maximum degree in A？

关键词： maximum degree minimum degree degree distribution random bipartite multigraphs

Simultaneous characterization of the atmospheres,surfaces,and exomoons of nearby rocky exoplanets

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Earth and Planetary Physics 2018年第3期2卷 247-256页

作者： WenLiang Cui JinSu Zhang Frederic Schmidt Duo Cui XiaoMeng Huang Tong Li Feng Tian Ministry of Education Key Laboratory for Earth System Modeling Department for Earth System ScienceTsinghua University Department of Physics Tsinghua University GEOPS Univ.Paris-SudCNRSUniversité Paris-Saclay

Atmospheric composition is an important indicator of habitability and *** presence or absence of a large exomoon around an Earth-size exoplanet could have important consequences for planet climate *** the detection of exomoons and retrieval of information regarding atmospheric composition of Earth-size exoplanets are important goals of future exoplanet *** a data analysis method is developed to achieve both goals simultaneously,based on reflection spectra of exoplanet-exomoon *** show that the existence of exomoons,the size of exomoons,and the concentrations of some atomic and molecular species in the atmospheres of their hosting Earth-like exoplanets can be retrieved with high levels of *** addition,the method can provide well-constrained fractions of basic surface types on the targets because of the characteristic spectral features of atmospheric species and surface types in the analyzed spectral range.

关键词： exoplanet biosignature exomoon

Liver resection and metabolic disorders: An undescribed mechanism leading to postoperative mortality

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World Journal of Gastroenterology 2014年第39期20卷 14455-14462页

作者： Alban Zarzavadjian Le Bian Renato Costi Mohamed Said Sbai-Idrissi Claude Smadja Service de Chirurgie Digestive H?pital Antoine BéclèreClamart Assistance Publique-H?pitaux de ParisUniversité Paris Sud-XI 91400 Orsay France Laboratoire d’Ethique Médicale et de Médecine Légale Université Paris Descartes-V 75006 Paris France Service de Chirurgie Digestive H?pital Simone Veil95600 Eaubonne France Dipartimento di Scienze Chirurgiche Università degli Studi di Parma 43100 Parma Italy

AIM: To investigate the mechanism leading to perioperative mortality in patients undergoing major liver resection and presenting with metabolic disorders.

关键词： Metabolic syndrome Major hepatectomy Liver resection Postoperative mortality Hepatorenal syndrome