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Barium isotope cosmochemistry and geochemistry

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Science Bulletin 2018年第6期63卷 385-394页

作者： Quentin Charbonnier Frederic Moynier julien Bouchez Institut de Physique du Globe de Paris Universite Paris Diderot Sorbonne Paris Cite CNRS UMR 71541rue Jussieu 75238 Paris France Institut Universitaire de France and Universite Paris Diderot 75231 Paris France

While the isotopic variations of barium were reported for the first time fourty years ago, the number of studies on barium isotopes significantly increased only after 2010. Barium isotope anomalies in meteorites have been successfully used to provide constraints about the origin of presolar Si C grains. In carbonaceous chondrites Ba isotope anomalies are indicative of the heterogeneity of the early solar system, possibly resulting from of a later injection of material after the cooling of solar system. Barium isotope fractionation in the same carbonaceous chondrites suggests that a strong magnetic field was present in the innermost part of the early solar system. Barium mass-dependent isotope fractionation has also been detected throughout Earth surface materials. While igneous rocks show limited Ba isotopic variations, relatively large isotopic variations are observed amongst and within soils, rivers, and biological materials. Indeed, plants seem to fractionate Ba isotopes during Ba uptake from soil ***, Ba isotope signatures have the potential to provide clues on the biological cycling of Ba at the Earth surface. In seawater, Ba isotopic variations have been mapped out, and are mainly related to barite precipitation, which is in turn related to organic matter remineralization in the water *** makes Ba isotopes a potentially powerful tool to reconstruct past ocean productivity, although constraints are still lacking regarding the inputs of dissolved Ba to the oceans by rivers or hydrothermalism.

关键词： Barium Meteorites Earth surface Critical zone

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UAV navigation system using line-based sensor pose estimation

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Geo-Spatial Information Science 2018年第1期21卷 2-11页

作者： julien Li-Chee-Ming Costas Armenakis Department of Earth and Space Science and Engineering Geomatics EngineeringLassonde School of EngineeringYork UniversityTorontoCanada

This work presents a mapping and tracking system based on images to enable a small Unmanned Aerial Vehicle(UAV)to accurately navigate in indoor and GPS-denied outdoor environments.A method is proposed to estimate the UAV’s pose(i.e.,the 3D position and orientation of the camera sensor)in real-time using only the on-board RGB camera as the UAV travels through a known 3D environment(i.e.,a 3D CAD model).Linear features are extracted and automatically matched between images collected by the UAV’s onboard RGB camera and the 3D object *** matched lines from the 3D model serve as ground control to estimate the camera pose in real-time via line-based space *** results demonstrate that the proposed modelbased pose estimation algorithm provides sub-meter positioning accuracies in both indoor and outdoor *** is also that shown the proposed method can provide sparse updates to correct the drift from complementary simultaneous localization and mapping(SLAM)-derived pose estimates.

关键词： Pose estimation modelbased tracking navigation GPS-denied environment

An efficient sensitivity analysis for energy performance of building envelope: A continuous derivative based approach

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Building Simulation 2021年第4期14卷 909-930页

作者： Ainagul Jumabekova julien Berger Aurélie Foucquier UMR 5271 CNRS LOCIEUniversity of Grenoble AlpesUniversity of Savoie Mont Blanc73000ChambéryFrance LaSIE La Rochelle UniversityCNRSUMR 735617000La RochelleFrance CEA LITENDTSINESUniversity of Grenoble AlpesF-38000GrenobleFrance

Within the framework of building energy assessment,this article proposes to use a derivative based sensitivity analysis of heat transfer models in a building ***,global and local,estimators are obtained at low computational cost,to evaluate the influence of the parameters on the model *** of these estimators values allows to reduce the number of model unknown parameters by excluding non-significant parameters.A comparison with variance and regression-based methods is carried out and the results highlight the satisfactory accuracy of the continuous-based ***,for the carried investigations the approach is 100 times faster compared to the variance-based methods.A case study applies the method to a real-world building *** sensitivity of the thermal loads to local or global variations of the wall thermal properties is ***,a case study of wall with window is analyzed.

关键词： heat transfer sensitivity analysis continuous derivative based approach parameter estimation problem DuFort-Frankel numerical scheme sensitivity coefficients

Biomimetic Autopilot Based on Minimalistic Motion Vision for Navigating along Corridors Comprising U-shaped and S-shaped Turns

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Journal of Bionic Engineering 2015年第1期12卷 47-60页

作者： julien R. Serres Franck Ruffier Aix-Marseille UniversitY CNRS ISM UMR 7287 Biorobotics Lab 13288 Marseille Cedex 09 France

A bioinspired autopilot is presented, in which body saccadic and intersaceadic systems are combined. This autopilot en- ables a simulated hovercraft to travel along corridors comprising L-junctions, U-shaped and S-shaped turns, relying on mini- realistic motion vision cues alone without measuring its speed or distance from walls, in much the same way as flies and bees manage their flight in similar situations. The saccadic system responsible for avoiding frontal collisions triggers yawing body saccades with appropriately quantified angles based simply on a few local optic flow measurements, giving the angle of inci- dence with respect to a frontal wall. The simulated robot negotiates stiff bends by triggering body saccades to realign its tra- jectory, thus traveling parallel with the wall along a corridor comprising sharp turns. Direct comparison shows that the per- formance of this new body saccade-based autopilot closely resembles the behavior of a fly using similar body saccade strategy when flying along a corridor with an S-shaped turn, despite the huge differences in terms of the inertia.

关键词： optic flow collision avoidance body saccades insect flight biorobotics biomimetics

连接天空与大地斯特拉斯堡大学科学花园天文馆

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室内设计与装修 2024年第8期 80-83页

作者： [法国]frenak+jullien [加拿大]Cardin julien [法国]m+mathieu holdrinet Maxime Delvaux(摄影) 沙漏(编译) 不详

描绘天空、想象宇宙、谈论天文学,斯特拉斯堡大学科学花园天文馆梦幻般的维度,激发了由frenak+jullien (法国)领衔的建筑团队的灵感,并与副建筑师Cardin J ulien (加拿大)和项目建筑师m+mathieu holdrin1t(法国)共同创造了建筑的独特形... 详细信息

描绘天空、想象宇宙、谈论天文学,斯特拉斯堡大学科学花园天文馆梦幻般的维度,激发了由frenak+jullien (法国)领衔的建筑团队的灵感,并与副建筑师Cardin J ulien (加拿大)和项目建筑师m+mathieu holdrin1t(法国)共同创造了建筑的独特形式。该天文馆位于气势恢宏的动物学和地质学研究所之间,由2个深色体量组成,在园内丰富的绿色植物中显得格外醒目:一个截顶圆锥体,用于容纳138个座位的放映室及其入口长廊;一个圆柱体量,用于容纳科学园大厅及相关服务设施。截顶圆锥体直冲云霄,寓意对宇宙知识的永恒探索,而开放的大厅则指向科学园管理的众多场所。

关键词：科学园圆锥体直冲云霄服务设施天文馆绿色植物动物学天文学

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Dissemination of Resistance Integrons and Genes Coding for Blse and Cabapenemases in the Urban Drainage Network in Cote d’Ivoire

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Advances in Microbiology 2024年第5期14卷 268-286页

作者： Coulibaly Kalpy julien Diaby Aboubakar Sidik Vakou N’dri Sabine M’bengue Gbonon Valérie Carole Claon Jean Stephane Yao Kouamé Eric Gnali Gbohounou Fabrice Yéo Yéfougnini Bagré Issa Djaman Allico Joseph Dosso Mireille Pasteur Institute of Ivory Coast Abidjan C&#244te d&#8217Ivoire Fé lix Houphou&#235t-Boigny University Abidjan C&#244te d&#8217Ivoire

Antibiotic resistance has become a major threat to human health worldwide. Environment, particularly the water environment, has long been overlooked as a player in the antibiotic resistance cycle, although its role remains unclear. These can provide an ideal setting for the acquisition and dissemination of antibiotic resistance, as they are frequently affected by anthropogenic activities. The objective of this study was to establish a diffusion map of resistance integrons used as genetic markers of resistance associated with antibiotic resistance conferring genes (ARGs). Total DNA extracts from non-cultivable bacterial communities were used for the analyses. These communities were obtained from wastewater samples from 14 sites upstream and downstream of drainage channels or effluents in the cities of Abidjan, Bouaké, and Yamoussoukro. The results obtained correspond to the number of positives among the treated samples (n = 39). Among the genetic markers of dissemination, class 1 integrons were the most evident in 94.8% of samples in Abidjan (93.3%), Bouaké (100%) and Yamoussoukro (91.6%). Class 2 integrons and class 3 integrons were found respectively in 41% and 51% of all samples. Genes coding for β-lactamases and blaTEM was identified in almost all samples at a rate of 97.4%. A co-presence of the three genes blaTEM, blaSHV and blaCTX-M is also remarkable in the sites of the city of Yamoussoukro. Among the genes coding for carbapenemases, only blaKPC 17.94%, blaNDM 30.76% and blaOXA48 38.46% were detected in the samples.

关键词： Antibiotic Resistance Wastewater Resistance Integrons (RIs) Resistance Genes

Dual angiogenesis and PD-1 blockade in hepatocellular carcinoma

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Hepatobiliary Surgery and Nutrition 2020年第3期9卷 350-352页

作者： julien Calderaro Département de Pathologie Centre Hospitalier Universitaire Henri MondorAssistance Publique Hôpitaux de ParisCréteilFrance Inserm U955 Team 18UniversitéParis-Est CréteilCréteilFrance

Hepatocellular carcinoma(HCC)is the fourth leading cause of cancer related-death worldwide and its incidence is rising in most western countries(1).

关键词： death carcinoma hepatocellular

Classification of Sandstone-Related Uranium Deposits

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Journal of Earth Science 2022年第2期33卷 236-256页

作者： Michel Cuney julien Mercadier Christophe Bonnetti Universitéde Lorraine GéoRessourcesCNRSCREGUNancy F54500France 2.State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchang 330013China

Sandstone type deposits are the most common type of uranium deposits in the world.A large variety of sub-types have been defined,based either on the morphology of the deposits(e.g.,tabular,roll front,etc),or on the sedimentological setting(e.g.,paleovalley,paleochannel,unconformity),or on tectonic or lithologic controls(e.g.,tectonolithologic,mafic dykes/sills),or still on a variety of others characteristics(phreatic oxidation type,interlayer permeable type,multi-element stratabound infiltrational,solution front limb deposit,humate type,etc.),reflecting the diversity of the characteristics of these deposits,but making it difficult to have a clear overview of these ***,uranium deposits occurring in the same sedimentological setting(e.g.,paleochannel),presenting similar morphologies(e.g.,tabular),may result from different genetic mechanisms and thus can be misleading for exploration *** aim of the present paper is to propose a new view on sandstone-related uranium deposits combining both genetic and descriptive *** dual view is indeed of primordial importance because all the critical characteristics of each deposit type,not limited to the morphology/geometry of the ore bodies and their relationships with depositional environments of the sandstone,have to be taken into account to propose a comprehensive classification of uranium *** this respect,several key ore-forming processes,like the physical-chemical characteristics of the mineralizing fluid,have to be used to integrate genetic aspects in the *** a succession of concentration steps,potentially temporally-disconnected,are involved in the genesis of some uranium mineralization,the classification here proposed will focus on the main mechanisms responsible for the formation and/or the location of ore *** objective of this paper is also to propose a robust and widely usable terminology to define and categorize sandstone uranium deposits,considering

关键词： sandstone uranium genetic classification redox control depositional environment fluids ore deposit geology

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UPLAND EROSION MODELING WITH CASC2D-SED

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International Journal of Sediment Research 2002年第4期17卷 265-274页

作者： Pierre julien,Rosalía ROJAS Engineering Research Center Colorado State University Research Associate Civil Engineering Dept. Colorado State University Professor of Civil EngineeringFortCollins CO80523 USA Fort Collins CO80523 USA

Developed at Colorado State University, CASC2D-SED is a physically-based model simulating the hydrologic response of a watershed to a distributed rainfall field. The time-dependent processes include: precipitation, interception, infiltration, surface runoff and channel routing, upland erosion, transport and sedimentation. CASC2D-SED is applied to Goodwin Creek, Mississippi. The watershed covers 21 km2 and has been extensively monitored both at the outlet and at several internal locations by the ARS-NSL at Oxford, MS. The model has been calibrated and validated using rainfall data from 16 meteorological stations, 6 stream gauging stations and 6 sediment gauging stations. Sediment erosion/deposition rates by size fraction are predicted both in space and time. Geovisualization, a powerful data exploration technique based on GIS technology, is used to analyze and display the dynamic output time series generated by the CASC2D-SED model.

关键词： Geographical Information System (GIS) Hydrologic model Soil erosion Watershed