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Lanthanide-doped nanoscintillators

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Light(Science & Applications) 2022年第10期11卷 2264-2266页

作者： Jean-Claude georges Bünzli institute of Chemical Sciences and Engineering Swiss Federal Institute of TechnologyLausanne(EPFL)LausanneSwitzerland Department of Biomedical Engineering Southern University of Science and Technology(SUSTech)ShenzhenChina

Lanthanide-doped nanoscintillators are taking the lead in several important fields including radiation detection,biomedicine,both at the level of diagnosis and therapy,and information encoding.

关键词： diagnosis Lanthanide ill

Asymptotic Behavior of a Structure Made by a Plate and a Straight Rod

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Chinese Annals of Mathematics,Series B 2013年第3期34卷 399-434页

作者： Dominique BLANCHARD georges GRISO Universit de Rouen France Laboratoire J.-L. Lions-CNRS Boite courrier 187 Universit Pierre et Marie Curie 4 Place Jussieu 75005 Paris France

This paper is devoted to describing the asymptotic behavior of a structure made by a thin plate and a thin perpendicular rod in the framework of nonlinear elasticity. The authors scale the applied forces in such a way that the level of the total elastic energy leads to the Von-Karman＇s equations （or the linear model for smaller forces） in the plate and to a one-dimensional rod-model at the limit. The junction conditions include in particular the continuity of the bending in the plate and the stretching in the rod at the junction.

关键词： Nonlinear elasticity Junction Straight rod Plate

Homogenization of Periodically Heterogeneous Thin Beams

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Chinese Annals of Mathematics,Series B 2018年第3期39卷 397-426页

作者： georges GRISO Bernadette MIARA Laboratoire J.-L.Lions-CNRS Bote courrier 187Universite Pierre et Marie Curie4 Place Jussieu75005 ParisFrance Universite Paris-Est 5 boulevard DescartesChamps-sur-Marne77454 Marne-la-Vallee Cedex2France

Consider an elastic thin three-dimensional body made of a periodic distribution of elastic *** both the thickness of the beam and the size of the heterogeneities tend simultaneously to zero the authors obtain three di... 详细信息

关键词： Bernoulli-Navier model Beam Korn's inequalities Dimensional reduction Homogenization

Organization：A new focus on mine safety improvement in a complex operational and business environment

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International Journal of Mining Science and Technology 2017年第4期27卷 617-625页

作者： Komljenovic Dragan Loiselle georges Kumral Mustafa Institut de Recherche d'Hydro-Quebec (IREQ) 1800 boul. Lionel-Boulet Varennes J3X 1S1 Canada Hydro-Quebec Trans Energie 5250 Armand-Frappier St-Hubert J3Z 1G3 Canada Department of Mining and Materials Engineering McGill University Montreal H3A OE8 Canada

The daily operations in the mining industry are still a significant source of risk with regard to occupational safety and health(OS & H). Various research studies and statistical data world-wide show that the number of serious injuries and fatalities still remains high despite substantial efforts the industry has put in recent years in decreasing those numbers. This paper argues that the next level of safety performance will have to consider a transition from coping solely with workplace dangers, to a more systemic model taking organizational risks in consideration. In this aspect, lessons learned from the nuclear industry may be useful, as organizational learning processes are believed to be more universal than the technologies in which they are used. With the notable exception of major accidents, organizational performance has not received all the attention it deserves. A key element for reaching the next level of performance is to include organizational factors in low level events analyses, and approach the management as a risk control system. These factors will then appear not only in the event analysis,but in supervision activities, audits, change management and the like. Many recent event analyses across various industries have shown that organizational factors play a key role in creating conditions for triggering major accidents(aviation, railway transportation, nuclear industry, oil exploitation, mining, etc.).In this paper, a perspective that may be used in supervisory activities, self-assessments and minor events investigations, is presented. When ingrained in an organizational culture, such perspective has the highest potential for continuous safety improvement.

关键词： Occupational safety and health Safety culture Organizational performance Risk analysis and management

mRNA vaccines: Past, present, future

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Asian Journal of Pharmaceutical Sciences 2022年第4期17卷 491-522页

作者： Mia Karam georges Daoud Biomedical Engineering Program Maroun Semaan Faculty of Engineering and ArchitectureBeirut 11072020Lebanon Department of Biochemistry and Molecular Genetics Faculty of MedicineBeirut 11072020Lebanon Department of Anatomy Cell Biologyand Physiological SciencesFaculty of MedicineAmerican University of BeirutBeirut 11072020Lebanon

mRNA vaccines have emerged as promising alternative platforms to conventional *** ease of production,low cost,safety profile and high potency render them ideal candidates for prevention and treatment of infectious diseases,especially in the midst of *** challenges that face in vitro transcribed RNA were partially amended by addition of tethered adjuvants or co-delivery of naked mRNA with an adjuvanttethered ***,it wasn’t until recently that the progress made in nanotechnology helped enhance mRNA stability and delivery by entrapment in novel delivery systems of which,lipid *** continuous advancement in the fields of nanotechnology and tissue engineering provided novel carriers for mRNA vaccines such as polymeric nanoparticles and *** studies have shown the advantages of adopting mRNA vaccines for viral diseases and cancer in animal and human ***-amplifying mRNA is considered today the next generation of mRNA vaccines and current studies reveal promising *** review provides a comprehensive overview of mRNA vaccines used in past and present studies,and discusses future directions and challenges in advancing this vaccine platform to widespread clinical use.

关键词： mRNA vaccine Virus Cancer Nanoparticles COVID-19

CLASSICAL HEISENBERG MAGNETIC CHAINS SHOWING CATIONIC SITE OCCUPATIONS CORRELATIONS

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Chinese Physics Letters 1989年第11期6卷 518-521页

作者： R.georges XU Qiang Laboratoire de Chimie du Solide Universitéde Bordeaux I33405TalenceCEDEX Kamerling Onnes Laboratorium Nieuwsteeg 18P.O.Box 95062300RALeydenThe Netherlands

We propose a model for calculating the magnetic susceptibility of classical Heisenberg chains,showing nearest neighbor correlated cationic *** result formally looks like expressions obtained for random chains where the neighboring cationic species are not *** the present result the intervening scalar parameters are replaced,by vector and matricial expressions.

关键词： chains cationic CLASS

Optimization of the gain in Yb^(3+)-doped cubic laser crystals of 99.99% purity

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Journal of Rare Earths 2009年第4期27卷 616-618页

作者： georges Boulon Yannick Guyot Akira Yoshikawa Physical Chemistry of Luminescent Materials University Claude Berna rd/Lyon1 UMR 5620 CNRS Bt.A.Kastler Domaine Scientifique de La Doua 69622 Villeurbanne France IMRAM Tohoku University 2-1-1 Katahira Aoba-ku Sendai 980-8577 Japan

This was an outlook on the prediction of the infrared laser potentiality from concentration dependences of the 2F5/2 experimental decay time in Yb3＋-doped solid-state crystals mainly on cubic crystals with 99.99% pur... 详细信息

关键词： ytterbium fluoride garnet sesquioxide laser crystals concentration quenching self trapping lifetime

Numerical and experimental study of Boussinesq wall horizontal turbulent jet of fresh water in a static homogeneous environment of salt water

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Journal of Hydrodynamics 2015年第4期27卷 604-615页

作者： BELCAID Aicha LE PALEC georges DRAOUI Abdeslam IUSTI Laboratory UMR 7343Aix-Marseille UniversitéTechnopole de Chateau-Gombert5 rue Enrico Fermi13453 Marseille Cedex13France Energy Laboratory Research in Energy and Thermal Transfer TeamAbdelmalek Essaadi UniversityFaculty of Sciences and TechniquesTangierMorocco

This paper investigates a numerical and experimental study about buoyant wall turbulent jet in a static homogeneous environment. A light fluid of fresh water is injected horizontally and tangentially to a plane wall into homogenous salt water ambient. This later is given with different values of salinity and the initial fractional density is small, so the applicability of the Boussinesq approximation is valid. Since the domain temperature is assumed to be constant, the density of the mixture is a function of the salt concentration only. Mathematical model is based on the finite volume method and reports on an application of standard k- ？ turbulence model for steady flow with densimetric Froude numbers of 1-75 and Reynolds numbers of 2 000-6 000. The basic features of the model are the conservation of mass, momentum and concentration. The boundaries of jet body, the radius and cling length are determined. It is found that the jet spreading and behavior depend on the ratio between initial buoyancy flux and momentum, i.e., initial Froude number, and on the influence of wall boundary which corresponds to Coanda effect. Laboratory experiments were conducted with photographic observations of jet trajectories and numerical results are described and compared with the experiments. A good agreement with numerical and experimental results has been achieved.

关键词： wall jet turbulence Boussinesq approximation k-? model buoyancy cling length

3D finite element analysis of a two-surface wear model in fretting tests

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Friction 2023年第12期11卷 2278-2296页

作者： Stéphanie BASSEVILLE Djamel MISSOUM-BENZIANE georges CAILLETAUD Universitéde Versailles Saint-Quentin Versailles 78000France MINES ParisTech PSL Research UniversityMATCentre des MatériauxCNRS UMR 7633Evry Cedex BP 8791003France

This article aims at developing a computationally efficient framework to simulate the erosion of two contact surfaces in three-dimensional(3D),depending on the body *** framework involves finite element(FE)resolution of a fretting problem,wear computation via a non-local criterion including a wear distribution parameter(WDP),as well as updating of the geometry and automatic *** originality is based on the capability to capture the damage on each surface and obtain local and global results for a quantitative and qualitative *** simulations are carried out for two 3D contact specimens with different values of *** results highlight the importance of correctly modelling wear:One-surface wear model is sufficient from a global point of view(wear volume),or whenever the wear resistance for a body is much higher than that of another one,whereas a 3D two-surface wear model is essential to capturing local effects(contact pressure,wear footprint,etc.)related to the difference in wear resistance of the bodies.

关键词： three-dimensional(3D)finite element(FE)simulations fretting two-surface wear model titanium alloys