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Fluidization and Transport of Vibrated Granular Matter:A Review of Landmark and Recent Contributions

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Fluid Dynamics & Materials Processing 2024年第1期20卷 1-29页

作者： Peter Watson sebastien Vincent Bonnieu Marcello Lappa Department of Mechanical and Aerospace Engineering University of StrathclydeGlasgowUK European Space Agency European Space Research and Technology CentreNoordwijkNetherland

We present a short retrospective review of the existing literature about the dynamics of(dry)granular matter under the effect of *** main objective is the development of an integrated resource where vital information about past findings and recent discoveries is provided in a single *** attention is paid to those works where successful synthetic routes to as-yet unknown phenomena were *** landmark results are analyzed,while smoothly blending them with a history of the field and introducing possible categorizations of the prevalent *** no classification is perfect,and it is hard to distillate general properties out of specific observations or realizations,two possible ways to interpret the existing results are defined according to the type of forcing or the emerging(ensuing)regime of *** particular,first results concerning the case where vibrations and gravity are concurrent(vertical shaking)are examined,then the companion situation with vibrations perpendicular to gravity(horizontal shaking)is *** classes are introduced as follows:(1)Regimes where sand self-organizes leading to highly regular geometrical“pulsating”patterns(thin layer case);(2)Regimes where the material undergoes“fluidization”and develops an internal multicellular convective state(tick layers case);(3)Regimes where the free interface separating the sand from the overlying gas changes inclination or develops a kind a patterned configuration consisting of stable valleys and mountains or travelling waves;(4)Regimes where segregation is produced,i.e.,particles of a given size tend to be separated from the other grains(deep containers).Where possible,an analogy or parallelism is drawn with respect to the companion field of fluid-dynamics for which the assumption of“continuum”can be applied.

关键词： Granular materials vibrations fluidization flowability symmetry breaking

Lateral ring compression test applied to a small caliber steel jacket:Identification of a constitutive model

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Defence Technology（防务技术） 2024年第6期36卷 133-148页

作者： Yann Coget Yael Demarty Christophe Czarnota Anthony Bracq Jean-sebastien Brest Alexis Rusinek French-German Research Institute of Saint-Louis 5 Rue Du General Cassagnou68300 Saint-LouisFrance Laboratoire d'Etude des Microstructures et de Mecanique des Materiaux(LEM3) CNRSUniversite de LorraineArts&Metiers ParisTechF-57000 MetzFrance

The evolution of threats and scenarios requires continuous performance improvements of ballistic protections for armed *** a modeling point of view,it is necessary to use sufficiently precise material behavior models to accurately describe the phenomena observed during the impact of a projectile on a protective *** this context,the goal of this paper is to characterize the behavior of a small caliber steel jacket by combining experimental and numerical *** experimental method is based on the lateral compression of ring specimens directly machined from the thin and small *** speeds and temperatures are considered in a quasi-static regime in order to reveal the strain rate and temperature dependencies of the tested *** Finite Element Updating Method(FEMU)is *** results are coupled with an inverse optimization method and a finite element numerical model in order to determine the parameters of a constitutive model representative of the jacket *** of the present model are verified against experimental results and a parametric study as well as a discussion on the identified material parameters are *** results indicate that the strain hardening parameter can be neglected and the behavior of the thin steel jacket can be described by a modeling without strain hardening sensitivity.

关键词： Full metal jacket ammunition Lateral ring compression Inverse identification Numerical simulation

Machine learning approach to assess the association between anthropometric,metabolic,and nutritional status and semen parameters

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Asian Journal of Andrology 2024年第4期26卷 349-355页

作者： Guillaume Bachelot Antonin Lamaziere sebastien Czernichow Celine Faure Chrystelle Racine Rachel Levy Charlotte Dupont Nutrition and Fertility(ALIFERT)Group Author Information Sorbonne University School of Medicine Saint-Antoine Research CenterINSERM UMR 93827 rue ChalignyParis 75012France Reproductive Biology Department-CECOS Tenon HospitalAP-HP.Sorbonne UniversityParis 75020France Clinical Metabolomics Department Saint-Antoine HospitalAP-HP27 rue ChalignyParis 75012France Nutrition Department Obesity Specialist CentreGeorges Pompidou European HospitalAP-HPParis 75015France 不详

Many lifestyle factors,such as nutritional imbalance leading to obesity,metabolic disorders,and nutritional deficiency,have been identified as potential risk factors for male *** aim of this study was to evaluate the relationship between semen parameters and anthropometric,metabolic and nutritional *** was first assessed individually,then after the application of a previously constructed and validated machine learning score that allows their ***,metabolic,antioxidant,micronutrient,and sperm parameters from 75 men suffering from idiopathic infertility from four infertility centers in France(Jean-Verdier ART Center Hospital,Bondy;North Hospital ART Center,Saint-Étienne;Navarre Polyclinic ART Center,Pau;and Cochin Hospital ART Center,Paris)between September 2009 and December 2013 were *** assessing standard correlation analysis,a previously built machine learning model,providing a score ranging from 0(the poorest)to 1(the most favorable),was calculated for each man in the study *** machine learning model,which separates infertile/fertile men with unexplained infertility on the basis of their bioclinical signature,provides a more holistic evaluation of the influence of the considered markers(anthropometric,metabolic,and oxidative status).We observed a significant correlation of some anthropometric,metabolic,and nutritional disorders with some sperm ***,an unfavorable machine learning score was associated with a high level of sperm DNA *** anthropometric,metabolic,and oxidative patterns,which may reflect an appropriate lifestyle,appear to positively impact overall health,in particular reproductive *** study,consistent with previous publications,suggests that beyond semen quality parameters,in an essential assessment of male fertility,other key factors should be taken into *** this regard,the application of emerging artificial intelligence t

关键词： lifestyle machine learning metabolism nutrition sperm DNA fragmentation

Unveiling hidden outcomes in malignant gastric outlet obstruction research–insights from a"Pancreas 2000"review

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World Journal of Gastrointestinal Endoscopy 2024年第8期16卷 451-461页

作者： Filipe Vilas-Boas Giacomo Emanuele Maria Rizzo Charles De Ponthaud Stuart Robinson sebastien Gaujoux Gabriele Capurso Giuseppe Vanella Bahadır Bozkırlı Department of Gastroenterology São João University HospitalPorto 4200Portugal Endoscopy Service Department of Diagnostic and Therapeutic ServicesScientific Institute for ResearchHospitalization and Healthcare-The Mediterranean Institute for Transplantation and Highly Specialized TherapiesPalermo 90127SiciliaItaly Department of Digestive Hepato-Biliary and Pancreatic Surgery and Liver TransplantationAP-HP Pitié-SalpêtriereSorbonne UniversitéParis 75013Île-de-FranceFrance Department of Hepatobiliary Pancreatic and Transplant SurgeryFreeman HospitalNewcastle NE77DNNewcastle upon TyneUnited Kingdom Division of Pancreato-Biliary Endoscopy and Endosonography Pancreas Translational and Clinical Research CenterIRCCS San Raffaele Scientific InstituteVita-Salute San Raffaele UniversityMilano 20132Italy Department of General Surgery HPB-UnitAcıbadem Maslak HospitalIstanbul 34398Türkiye

Malignant gastric outlet obstruction(mGOO)is a major condition affecting patients with periampullary tumors,including pancreatic *** current treatment options include surgical gastroenterostomy,endoscopic stenting and more recently EUS-guided *** studies comparing the outcomes of the three procedures focus on technical success,clinical success and ***“occult”outcomes relevant to the patient’s viewpoints and perspective may ultimately impact on cancer-related and overall survival,such as body mass composition,nutritional biomarkers,chemotherapy tolerance and patient-reported quality of *** aim of this review is to provide an overview of potential key outcomes that should be explored in future comparative research around mGOO treatment options.

关键词： Malignant gastric outlet obstruction Endoscopic ultrasound-guided gastroenterostomy Patient-reported outcomes Body composition Nutrition Quality of life

Treatment and prevention of epilepsy in onchocerciasis-endemic areas is urgently needed

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Infectious Diseases of Poverty 2024年第1期13卷 85-89页

作者： Robert Colebunders Joseph Nelson Siewe Fodjo Olivia Kamoen Luis-Jorge Amaral Amber Hadermann Chiara Trevisan Mark J.Taylor Julia Gauglitz Achim Hoerauf Yasuaki Sato Katja Polman Maria-Gloria Basanez Dan Bhwana Thomson Lakwo Gasim Abd-Elfarag sebastien D.Pion Global Health Institute University of AntwerpAntwerpBelgium Department of Neurology Heilig Hart ZiekenhuisLierBelgium Department of Public Health Institute of Tropical MedicineAntwerpBelgium Liverpool School of Tropical Medicine LiverpoolUK Department of Computer Science University of AntwerpAntwerpBelgium Institute of Medical Microbiology Immunology and ParasitologyUniversity Hospital BonnBonnGermany German Center for Infection Research(DZIF) Partner Site Bonn-CologneBonnGermany School of Global Humanities and Social Sciences Nagasaki UniversityNagasakiJapan MRC Centre for Global Infectious Disease Analysis and London Centre for Neglected TropicalDisease Research Department of Infectious Disease EpidemiologySchool of Public HealthImperial College LondonLondonUK National Institute for Medical Research TangaTanzania Vector Control Division Ministry of HealthKampalaUganda School of Public Health University of JubaJubaSouth Sudan Access for Humanity JubaSouth Sudan French National Research Institute for Sustainable Development MontpellierFrance

Background There is increasing epidemiological evidence supporting the association between onchocerciasis and seizures, reinforcing the concept of onchocerciasis-associated epilepsy (OAE). The aim of this paper is to provide an update on the new knowledge about OAE and to propose recommendations to the World Health Organization how to address this public health *** text During the 2nd International Workshop on OAE held on 19-21 September, 2023, in Antwerp, Belgium, participants recognised OAE as a substantial yet neglected public health problem, particularly in areas of sub-Saharan Africa where onchocerciasis remains hyperendemic. Evidence from prospective population-based studies suggest that strengthening onchocerciasis elimination efforts leads to a significant reduction of OAE incidence. There is a need to validate an OAE case definition to estimate the burden of disease and identify onchocerciasis-endemic areas requiring intensification of onchocerciasis elimination programmes and integration of epilepsy care. It is expected that raising awareness about OAE will boost the population uptake of ivermectin. The implementation of a community-based epilepsy treatment programme offering free anti-seizure medications (ASMs) has shown high effectiveness in reducing the frequency of seizures and improving the overall quality of life of people with *** To reduce OAE burden, enhanced collaboration between onchocerciasis and mental health programmes at community, national, and international levels is required. Urgent efforts are needed to ensure the uninterrupted provision of free ASMs in onchocerciasis-endemic areas. Furthermore, OAE should be included in the quantification of the onchocerciasis disease burden.

关键词： Onchocerciasis Morbidity Burden of disease Prevention Ivermectin Epilepsy Nodding syndrome Treatment Children Policy

Directional H^(2) Compression Algorithm: Optimisations and Application to a Discontinuous Galerkin BEM for the Helmholtz Equation

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Communications in Computational Physics 2022年第5期31卷 1585-1635页

作者： Nadir-Alexandre Messaï sebastien Pernet Abdesselam Bouguerra ONERA/DTIS Universitéfédérale de Toulouse F-31000 Toulouse France Laboratoire de Physique de la Matière et du Rayonnement(LPMR) Département de Sciences de la MatièreUniversitéde Souk-AhrasBP 155341000 Souk-AhrasAlgeria

This study aimed to specialise a directional H^(2)(DH^(2))compression to matrices arising from the discontinuous Galerkin(DG)discretisation of the hypersingular equation in *** significantfinding is an algorithm that takes a DG stiffness matrix andfinds a near-optimal DH^(2) approximation for low and high-frequency *** introduced the necessary special optimisations to make this algorithm more efficient in the case of a DG stiffness ***,an automatic parameter tuning strategy makes it easy to use and *** comparisons with a classical Boundary Element Method(BEM)show that a DG scheme combined with a DH^(2) gives better computational efficiency than a classical BEM in the case of high-order finite elements and hp heterogeneous *** results indicate that DG is suitable for an auto-adaptive context in integral equations.

关键词： Integral equation boundary element method Helmholtz equation discontinuous Galerkin directional H^(2)-matrix low-rank approximation all frequency compression algorithm

Tidal triggering of seismicity in the region of Palu, Central Sulawesi, Indonesia

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Geodesy and Geodynamics 2023年第4期14卷 377-384页

作者： Ibnu Nurul Huda sebastien Lambert Jean Souchay Research Center for Computing National Research and Innovation AgencyBogorIndonesia Department of Astronomy and Bosscha Observatory FMIPAInstitut Teknologi BandungBandungIndonesia SYRTE Observatoire de ParisUniversité PSLCNRSSorbonne UniversitéLNEParisFrance

This paper investigates the correlation between tidal stress and earthquakes for periods ranging from hours to months in the limited zone of the Palu region(Central Sulawesi,Indonesia).Through Schuster and binomial tests,we examined the relation between the seismicity(time density of seismic events)and tidal potential arising from the Moon and Sun,using all tidal components simultaneously and focusing on the estimation of specific *** results show significant correlations between the seismicity and tidal potential for S2(0.5 d)and O1(1.075 d)tidal components in the case of solely isolated earthquake events,particularly for shallow ***,there is a strong relationship between aftershocks and tidal components larger than the Mf period(13.661 d).Finally,the analysis of the temporal variation of the earthquake-tide relation reveals an optimal correlation for about six years before the 2018 great Palu *** correlation becomes insignificant afterwards.

关键词： Tidal triggering Earth tides Palu region Statistical test

Kinetic Slip Boundary Condition for Isothermal Rarefied Gas Flows through Static Non-Planar Geometries Based on the Regularized Lattice-Boltzmann Method

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Communications in Computational Physics 2022年第3期31卷 816-868页

作者： Jean-Michel Tucny David Vidal sebastien Leclaire Francois Bertrand Mechanical Engineering Department Polytechnique MontralP.O.Box 6079Stn.CVMontrealQCCANADAH3C 3A7 Chemical Engineering Department Polytechnique MontralP.O.Box 6079Stn.CVMontrealQCCANADAH3C 3A7

The simulation of rarefied gasflows through complex porous media is chal-lenging due to the tortuousflow pathways inherent to such *** Lattice Boltzmann method(LBM)has been identified as a promising avenue to solveflows through complex geometries due to the simplicity of its scheme and its high parallel computational *** has been proposed to model the stress-strain relationship with the extended Navier-Stokes equations rather than attempting to directly solve the Boltzmann ***,a regularization technique is required tofilter out non-resolved higher-order components with a low-order velocity *** slip boundary conditions(BCs)have been proposed for the non-regularized multiple relaxation time LBM(MRT-LBM)for planar geometries,previous slip BCs have never been verified extensively with the regularization *** this work,following an extensive literature review on the imposition of slip BCs for rarefiedflows with the LBM,it is proven that earlier values for kinetic parameters developed to impose slip BCs are inaccurate for the regularized MRT-LBM and differ between the D2Q9 and D3Q15 *** error was eliminated for planarflows and good agreement be-tween analytical solutions for arrays of cylinders and spheres was found with a wide range of Knudsen numbers.

关键词： Lattice Boltzmann method(LBM) boundary condition(BC) rarefiedflow nonplanar geometry

Gaining access to acetyl-CoA by peroxisomal surface display

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Synthetic and Systems Biotechnology 2023年第2期8卷 224-226页

作者： Thomas Perrot sebastien Besseau Nicolas Papon Vincent Courdavault Biomolecules et Biotechnologies Vegetales BBVEA2106Universite de ToursToursFrance Univ Angers Univ BrestIRFSFR ICATF-49000AngersFrance

Synthetic biology is constantly making progress for producing compounds on ***,Yocum and collaborators have developed an outstanding approach based on the anchoring of biosynthetic enzymes to the peroxisomal *** allow... 详细信息

关键词： Synthetic biology Enzymes colocalization Peroxisomal membrane Acetyl-CoA Polyketides