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Hepatocellular carcinoma and industrial epidemics

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World Journal of gastroenterology 2011年第24期17卷 2976-2976页

作者： Alain Braillon gérard dubois gres 27rue Voiture Public Health Northern hospitalplace Victor Pauchet

Worldwide,the burden of the non viral causes of hepatocellular carcinoma(HCC) is usually *** industrial goods,tobacco,alcohol and processed foods are the agents of new epidemics in modern times which far outscore the burden of infectious agents on morbidity and ***,a dose-related contributing factor for HCC,receives too little attention in clinical *** France,tobacco,hepatitis B and C virus and alcohol are the main risk factors for HCC mortality(33%,31% and 26%,respectively).In developing countries,where tobacco consumption is dramatically increasing,this epidemic may soon surpass hepatitis *** and diabetes are the contributing factors *** role of industrial processed foods in the increase of the prevalence of obesity and diabetes cannot be ignored.

关键词： Hepatocellular carcinoma Tobacco Alcohol Processed foods Industrial epidemics

Design and fabrication of crack-junctions

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Microsystems & Nanoengineering 2017年第1期3卷 71-79页

作者： Valentin dubois Frank Niklaus göran Stemme KTH Royal Institute of Technology Micro and NanosystemOsquldas väg 10Stockholm 10044Sweden

Nanogap electrodes consist of pairs of electrically conducting tips that exhibit nanoscale *** are building blocks for a variety of applications in quantum electronics,nanophotonics,plasmonics,nanopore sequencing,molecular electronics,and molecular ***-junctions(CJs)constitute a new class of nanogap electrodes that are formed by controlled fracture of suspended bridge structures fabricated in an electrically conducting thin film under residual tensile *** advantages of the CJ methodology over alternative technologies are that CJs can be fabricated with wafer-scale processes,and that the width of each individual nanogap can be precisely controlled in a range from o2 to 4100 *** the realization of CJs has been demonstrated in initial experiments,the impact of the different design parameters on the resulting CJs has not yet been *** we investigate the influence of design parameters such as the dimensions and shape of the notches,the length of the electrode-bridge and the design of the anchors,on the formation and propagation of cracks and on the resulting features of the *** verify that the design criteria yields accurate prediction of crack formation in electrode-bridges featuring a beam width of 280 nm and beam lengths ranging from 1 to 1.8μ*** further present design as well as experimental guidelines for the fabrication of CJs and propose an approach to initiate crack formation after release etching of the suspended electrode-bridge,thereby enabling the realization of CJs with pristine electrode surfaces.

关键词： arrays crack-junctions lithography nanofabrication nanogap electrodes notches optimization tunneling junctions

Reactive Extrusion(REx):Using Chemistry and Engineering to Solve the Problem of Ocean Plastics

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Engineering 2022年第7期8卷 15-18页

作者： Philippe dubois Center of Innovation and Research in Materials and Polymers&Materia Nova Research Center University of MonsMons B-7000Belgium

The reality of plastic pollution is no longer under debate:It has invaded our daily lives and is present all around us,with our oceans being no *** fact,a seventh“continent”has appeared in the oceans,composed of plastics and microplastics!Newspapers including Le Monde in France and The guardian in United Kingdom recently headlined the record rate of microplastic accumulation in the Arctic *** headlines referred to an article published in Nature Communications[1]that reported the finding of up to 12000 plastic microparticles per liter of water frozen in the sea *** this finding,what future solutions can counteract this particularly insidious pollution?

关键词： Arctic continent pollution

On Single Distribution Lattice Boltzmann Schemes for the Approximation of Navier Stokes Equations

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Communications in Computational Physics 2023年第8期34卷 613-671页

作者： Francois dubois Pierre Lallemand Laboratoire de Mathematiques d’Orsay Faculte des Sciences d’OrsayUniversite Paris-SaclayFrance Conservatoire National des Arts et Metiers LMSSC laboratoryParisFrance International Research Laboratory 3457 Centre National de la Recherche ScientifiqueCentre de Recherches MathematiquesUniversite de MontrealMontrealQCCanada Beijing Computational Science Research Center Haidian DistrictBeijing 100094China

In this contribution we study the formal ability of a multi-resolution-times lattice Boltzmann scheme to approximate isothermal and thermal compressible Navier Stokes equations with a single particle *** precisely,we consider a total of 12 classical square lattice Boltzmann schemes with prescribed sets of conserved and nonconserved *** question is to determine the algebraic expressions of the equilibrium functions for the nonconserved moments and the relaxation parameters associated to each *** compare the fluid equations and the result of the Taylor expansion method at second order accuracy for bidimensional examples with a maximum of 17 velocities and three-dimensional schemes with at most 33 *** some cases,it is not possible to fit exactly the physical *** several examples,we adjust the Navier Stokes equations and propose nontrivial expressions for the equilibria.

关键词： Partial differential equations asymptotic analysis

On Quasi-Reduced Quadratic Forms

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Acta Mathematica Sinica,English Series 2010年第8期26卷 1425-1448页

作者： E. dubois C. LEVESQUE Eugene dubois UMR 6138 CNRS Dep. de mathematiques et mecanique BP 5186 U. de Caen Basse-Normandie 14032 Caen France Claude Levesque CICMA et Departement de mathematiques et de statistique U. Laval Quebec P. Qudbec Canada G1K 7P4

With the help of continued fractions, we plan to list all the elements of the set Q△ = {aX2 ＋ bXY ＋ cY2 ： a,b, c ∈Z, b2 - 4ac = △ with 0 ≤ b 〈 √△}of quasi-reduced quadratic forms of fundamental discriminant △. As a matter of fact, we show that for each reduced quadratic form f = aX2 ＋ bXY ＋ cY2 = （a, b, c） of discriminant △〉0（and of sign σ（f） equal to the sign of a）, the quadratic forms associated with f and defined by {〈a＋bu＋cu2,b＋2cu.c〉},with 1≤σ（f）u≤b/2｜c｜（whenever they exist）, 〈c,-b-2cu,a＋bu＋cu2〉 with b/2｜c｜≤σ（f）u≤[w（f）]=[b＋√△/2｜c｜], are all different from one another and build a set I（f） whose cardinality is #I（f）={1＋[ω（f）],when（2c）｜b,[ω（f）],when （2c）｜b. If f and g are two different reduced quadratic forms, we show that I（f） ∩ I（g） = Ф. Our main result is that the set Q△ is given by the disjoint union of all I（f） with f running through the set of reduced quadratic forms of discriminant △〉0. This allows us to deduce a formula for #（Q△） involving sums of partial quotients of certain continued fractions.

关键词： Quadratic forms reduced forms equivalence of forms class numbers quadratic fields,continued fractions

Image matching algorithm based on SIFT using color and exposure information

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Journal of Systems Engineering and Electronics 2016年第3期27卷 691-699页

作者： Yan Zhao Yuwei Zhai Eric dubois Shigang Wang School of Communication Engineering Jilin University School of Electrical Engineering and Computer Science University of Ottawa

Image matching based on scale invariant feature transform（SIFT） is one of the most popular image matching algorithms, which exhibits high robustness and accuracy. grayscale images rather than color images are generally used to get SIFT descriptors in order to reduce the complexity. The regions which have a similar grayscale level but different hues tend to produce wrong matching results in this case. Therefore, the loss of color information may result in decreasing of matching ratio. An image matching algorithm based on SIFT is proposed, which adds a color offset and an exposure offset when converting color images to grayscale images in order to enhance the matching ratio. Experimental results show that the proposed algorithm can effectively differentiate the regions with different colors but the similar grayscale level, and increase the matching ratio of image matching based on SIFT. Furthermore, it does not introduce much complexity than the traditional SIFT.

关键词： scale invariant feature transform(SIFT) image matching color exposure

An Immersed Method Based on Cut-Cells for the Simulation of 2D Incompressible Fluid Flows Past Solid Structures

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Computer Modeling in Engineering & Sciences 2019年第4期119卷 165-184页

作者： Francois Bouchon Thierry dubois Nicolas James Université Clermont Auvergne CNRSLMBPF-63000 CLERMONT-FERRANDFrance Laboratoire de Mathématiques et Applications UMR 7348 Universitéde PoitiersTéléport 2-B.P.30179Boulevard Marie et Pierre Curie86962 Futuroscope Chasseneuil CedexFrance

We present a cut-cell method for the simulation of 2D incompressible flows past *** consists in using the MAC scheme on cartesian grids and imposing Dirchlet boundary conditions for the velocity field on the boundary of solid structures following the Shortley-Weller *** order to ensure local conservation properties,viscous and convecting terms are discretized in a finite volume *** scheme is second order implicit in time for the linear part,the linear systems are solved by the use of the capacitance matrix method for non-moving *** results of flows around an impulsively started circular cylinder are presented which confirm the efficiency of the method,for Reynolds numbers 1000 and *** example of flows around a moving rigid body at Reynolds number 800 is also shown,a solver using the PETSc-Library has been prefered in this context to solve the linear systems.

关键词： Immersed boundary methods cutt-cell methods incompressible viscous flows

Epidemic Diseases and Chinese Medicine: Example of SARS and COVID-19: Part Two

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Chinese Medicine and Culture 2019年第3期2卷 121-132页

作者： Jean-Claude dubois georges Pompidou European Hospital Anti-Pain Center Faculty of MedicineParis V Rene Descartes UniversityParisFrance

Along with the legends about epidemic demons,China has developed over the centuries a medical approach to epidemic diseases based on the teachings of Hucng Di Nei Jing(《黄帝内经》Huangdi s Intermnal Classic),Nan Jing(《难经》Classic of Difficult Issues),and Shang Han Lun(《伤寒论》Treatise on Cold Damage).Other doctors and scientists participated in this evolution of knowledge,like Wang Shuhe(王叔和),ge Hong(葛洪),Chao Yuanfang(巢元方),Sun Simiao(孙思邈),and Liu Wansu(刘完素).However,it was in the 17^th century,after the great break of the Song,Jin,and Yuan eras that an innovative spirit,Wu Youke(吴又可1582-1652)first foresaw the existence of microorganisms as we know them *** Wen Yi Lun(《瘟疫论》Treatise on Pestilence)foreshadows an original approach to epidemic diseases,particularly emerging infectious diseases of the 21^st *** them,traditional Chinese medicine developed a comprehensive method of diagnosing and treating of these diseases(Epidemic Diseases Theory瘟疫学说)within the School ofHeat Diseases(温病学派).In a third article,we will examine some applications in the treatment of the SARS 2003-2004 epidemic(非典型肺炎)and the current COVID-19(新型冠状病毒肺炎)pandemic.

关键词： Chinese medical history epidemic diseases theory SARS COVID-19 Sun Zi Bing Fa(《孙子兵法》Art of War) Wen hiLun(《瘟疫论》Treatise on Pestilence) Wu Youke(吴又可)

On Triangular Lattice Boltzmann Schemes for Scalar Problems

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Communications in Computational Physics 2013年第3期13卷 649-670页

作者： Francois dubois Pierre Lallemand Conservatoire National des Arts et Metiers Department of MathematicsParisand Department of MathematicsUniversity Paris-SudBat.425F-91405 Orsay CedexFrance Centre National de la Recherche Scientifique ParisFrance

We propose to extend the d’Humi`eres version of the lattice Boltzmann scheme to triangular *** use Bravais lattices or more general lattices with the property that the degree of each internal vertex is supposed to be *** such meshes,it is possible to define the lattice Boltzmann scheme as a discrete particle method,without need of finite volume formulation or Delaunay-Voronoi hypothesis for the *** test this idea for the heat equation and perform an asymptotic analysis with the Taylor expansion method for two schemes named D2T4 and *** results show a convergence up to second order accuracy and set new questions concerning a possible super-convergence.

关键词： Laplacian operator heat equation d’Humi`eres scheme D2T4 D2T7