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Conformally flat, minimal, Lagrangian submanifolds in complex space forms

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Science China Mathematics 2022年第8期65卷 1641-1660页

作者： Miroslava Antić luc Vrancken Faculty of Mathematics University of BelgradeBelgrade 11000Serbia Laboratoire de Mathématiques pour l’Ingénieur Université Polytechnique Hauts-de-FranceValenciennes 59313France Departement Wiskunde Katholieke Universiteit LeuvenLeuven 3001Belgium

We investigate n-dimensional(n≥4),conformally flat,minimal,Lagrangian submanifolds of the n-dimensional complex space form in terms of the multiplicities of the eigenvalues of the Schouten tensor and classify those that admit at most one eigenvalue of multiplicity *** the case where the ambient space is Cn,the quasi umbilical case was studied in Blair(2007).However,the classification there is not complete and several examples are ***,we complete(and extend) the classification and we also deal with the case where the ambient complex space form has non-vanishing holomorphic sectional curvature.

关键词： Lagrangian submanifolds conformally flat complex space form warped product submanifold

Left Hemispherical Subdural Hematoma on the Same Side as the Motor Deficit (Kernohan)

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Open Journal of Modern Neurosurgery 2024年第3期14卷 212-217页

作者： Mohamed Cherif Ibrahima Berete Souare I. S. Junior Alpha Boubacar Bah Seylan Diawara Boubacar A. Dramé Aboubacar M. Camara Elisabeth Traore Mohamed L. Sylla Oumar Sow luc K. Beavogui Ibrahima S. Souare Department of Neurosurgery Sino Guinean Friendship Hospital Conakry Guinea Department of Neurosurgery Donka Hospital Conakry Guinea Department Anesthesia-Resuscitation Friendship Hospital Conakry Guinea

Chronic subdural hematoma represents 25% of traumatic subdural collections;common in elderly subjects with a clear male predominance. It occurs over the age of 50 in more than 90% of cases and 50% of patients have no history of head trauma even if the latter remains the main risk factor with others such as coagulopathy, anticoagulant treatment, chronic alcoholic poisoning. Its discovery is rarely fortuitous and has an important clinical polymorphism including an intracranial hypertension syndrome (complete or incomplete). We report a clinical case of a left hemispheric subacute subdural hematoma with post-traumatic falcorial involvement in a 70-year-old patient admitted with a picture of impaired consciousness and weakness of the left hemibody. The objective of this work is to draw the attention of neurosurgeons and neurologists to the paradoxical existence of the neurological deficit on the same side as the causal brain lesion.

关键词： Subdural Hematoma Kernohan

Characterization of Totally Geodesic Totally Real 3-dimensional Submanifolds in the 6-sphere

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Acta Mathematica Sinica,English Series 2006年第5期22卷 1557-1564页

作者： Miroslava ANTIC Mirjana DJORIC luc VRANCKEN Faculty of Mathematics University of BelgradeStudentski trg 16 pb. 550 11000 Belgrade Serbia and Montenegro LAMATH ISTV2 Université de Valenciennes Campus du Mont Houy59313 Valenciennes Cedex 9 France

In this paper, we study Lagrangian submanifolds of the nearly Kaehler 6-sphere. We derive a pinching result for the Ricci curvature of such submanifolds thus providing a characterisation of the totally geodesic subman... 详细信息

关键词： Ricci curvature totally real submanifold nearly Kaehler 6-sphere totally geodesic submanifold

Biobased polyurethanes for biomedical applications

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Bioactive Materials 2021年第4期6卷 1083-1106页

作者： Sophie Wendels luc Av´erous BioTeam/ICPEES-ECPM UMR CNRS 7515Universit´e de Strasbourg25 Rue Becquerel67087Strasbourg Cedex 2France

Polyurethanes(PUs)are a major family of polymers displaying a wide spectrum of physico-chemical,mechanical and structural properties for a large range of *** have shown suitable for biomedical applications and are used in this domain since *** current variety of biomass available has extended the diversity of starting materials for the elaboration of new biobased macromolecular architectures,allowing the development of biobased PUs with advanced properties such as controlled biotic and abiotic *** this frame,new tunable biomedical devices have been successfully *** structures with precise tissue biomimicking can be obtained and are adequate for adhesion,proliferation and differentiation of many cell’s ***,new smart shape-memory PUs with adjustable shape-recovery properties have demonstrated promising results for biomedical applications such as wound *** fossil-based starting materials substitution for biomedical implants is slowly improving,nonetheless better renewable contents need to be achieved for most PUs to obtain biobased *** a presentation of some PU generalities and an understanding of a biomaterial structure-biocompatibility relationship,recent developments of biobased PUs for non-implantable devices as well as short-and long-term implants are described in detail in this review and compared to more conventional PU structures.

关键词： Polyurethanes Biobased Biomedical Bioactive Tissue engineering Biocompatibility Scaffold

Effect of conspecific and heterospecific urine odors on the foraging behavior of the golden spiny mouse

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Integrative Zoology 2013年第1期8卷 1-8页

作者： Claude BAUDOIN Abraham HAIM Jean-luc DURAND Experimental and Comparative Ethology University of Paris 13VilletaneuseFrance Israeli Center for Interdisciplinary Research in Chronobiology University of HaifaHaifaIsrael

The common spiny mouse(Acomys cahirinus)inhibits the foraging activity of the golden spiny mouse(***).These two sympatric species of spiny mice,which are considered habitat competitors,occur in extreme arid *** test this theory of competition,the influence of urinary odors of both conspecific and heterospecific mice on the foraging behavior of *** was studied under controlled laboratory *** adult males,born in captivity and unfamiliar to the odors of the donor mice,were tested in 3 experimental conditions choosing between 2 seed patches that were scented with urine of either heterospecifics(***),conspecifics(***)or controls(odors of the tested individual).Of the 20 males,12 were also tested with urine of unfamiliar gerbils,bushy-tailed jird,considered as competitors in the *** conspecific and heterospecific urine samples from Acomys significantly reduced foraging behavior of *** when compared to the control *** inhibitory effect of the Acomys urine does not result from the novelty of chemical stimuli of the urine because no effect was shown with unfamiliar gerbil *** findings are in accordance with the general theory that *** dominates the foraging activity of *** hypothesize that chemical cues in the urine of Acomys *** induce a negative effect on the foraging behavior of ***.

关键词： Acomys spp. foraging behavior golden spiny mouse Sekeetamys calurus urine odors

Axial Breakthrough in Ancient Greece. New Considerations： Plato, Confucius, and the Buddha

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Fudan Journal of the Humanities and Social Sciences 2016年第4期9卷 555-564页

作者： luc Brisson Directeur de Recherche Emerite au Centre National de la Recherche Scientifique 4 bis rued'Italie 65013 Paris France

Here I will examine the resemblances and similarities between Plato and two other personages, Confucius and the Buddha, who were his near-contempo- raries, and who enabled a breakthrough. The Platonic break with the world of bodies and the sphere of belief, in favor of a level of intelligible realities, the models of the sensible realities explained by mathematics and moved by the soul, explains the specificity of the Western world, in the field of science, politics, ethics, and even religion.

关键词： Plato Confucius The Buddha Intelligible realities Soul Mathematics - Politics

Recent trends in the treatment of well-differentiated endocrine carcinoma of the small bowel

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World Journal of Gastroenterology 2010年第14期16卷 1696-1706页

作者： Gilles Poncet Jean-luc Faucheron Thomas Walter Department of Digestive Surgery Edouard Herriot Hospital 69437 Lyon cedex 03 France Department of Colorectal Surgery Michallon Hospital 38043 Grenoble cedex France Department of Medical Oncology Pavillon H Edouard Herriot Hospital 69437 Lyon Cedex 03 France

Well-differentiated endocrine carcinomas of the small bowel are fairly rare neoplasms that present many clinical challenges. They secrete peptides and neuroamines that may cause carcinoid syndrome. However, many are clinically silent until late presentation with major effects. Initial treatment aims to control carcinoid syndrome with somatostatin analogs. Even if there is metastatic spread, surgical resection of the primitive tumor should be discussed in cases of retractile mesenteritis, small bowel ischemia or subocclusive syndrome in order to avoid any acute complication, in particular at the beginning of somatostatin analog treatment. The choice of treatment depends on the symptoms, general health of the patient, tumor burden, degree of uptake of radionuclide, histological features of the tumor, and tumor growth. Management strategies include surgery for cure (which is rarely achieved) or for cytoreduction, radiological interventions (transarterial embolization or radiofrequency ablation), and chemotherapy (interferon and somatostatin analogs). New biological agent and radionuclide targeted therapies are under investigation. Diffuse and non-evolving lesions should also be simplymonitored. Finally, it has to be emphasized that it is of the utmost importance to enroll these patients with a rare disease in prospective clinical trials assessing new therapeutic strategies.

关键词： Gastrointestinal neoplasms Neuroendocrine carcinoma Carcinoid tumor Somatostatin analogs Therapeutic chemoembolization Surgery

Loco-regional treatments of unresectable hepatocellular carcinoma:safety first

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Hepatobiliary Surgery and Nutrition 2022年第2期11卷 324-326页

作者： Jean-luc Raoul Institut de Cancérologie de l’Ouest NantesFrance

Hepatocellular carcinoma(HCC)is a severe liver cancer that complicates underlying severe liver *** a long time,palliative treatment of unresectable HCC was loco-regional and based on tumor arterial hypervascularization and intra-tumor retention of Lipiodol when injected *** 1995,it was demonstrated that transarterial chemoembolization(TACE)reduced tumor growth and size,but did not significantly improve survival,because any benefit was offset by worsened liver function(1).Despite the failure to demonstrate improved survival,TACE remained the most commonly used palliative treatment worldwide for many *** 2002,two RCTs demonstrated the efficacy of TACE,but only in highly selected patients(2).The good indications for TACE were limited to certain intermediate stage HCC,PS 0(or possibly 1),with preserved liver function(Child-Pugh A without ascites),without vascular invasion,and had to be carried out in a selective manner to minimize the ischemic insult to non-tumoral tissue(3,4).In scores evaluating survival after a first TACE,the parameters linked to liver toxicity were more important than tumor response!In a recent comparison of TACE with lenvatinib,TACE but not lenvatinib was responsible for a severe decrease in the liver function(evaluating by the ALBI score)from baseline,and this acute deterioration persisted in the chronic period(5).The price to pay for the efficacy of TACE is thus liver function.

关键词： treatment spite invasion

Understanding the Rayleigh instability in humping phenomenon during laser powder bed fusion process

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International Journal of Extreme Manufacturing 2022年第1期4卷 85-92页

作者： Wenxuan Zhang Wenyuan Hou luc Deike Craig Arnold Department of Chemical and Biological Engineering Princeton UniversityPrincetonNJ 08544United States of America Princeton Institute for the Science and Technology of Materials Princeton UniversityPrincetonNJ 08544United States of America Department of Mechanical and Aerospace Engineering Princeton UniversityPrincetonNJ 08544United States of America High Meadows Environmental Institute Princeton UniversityPrincetonNJ 08544United States of America

The periodic undulation of a molten track’s height profile in laser-based powder bed fusion of metals(PBF-LB/M)is a commonly observed phenomena that can cause defects and building failure during the manufacturing *** a quantitative analysis of such instabilities has not been fully established and so here we used Rayleigh–Plateau theory to determine the stability of a single molten track in PBF-LB/M and tested it with various processing conditions by changing laser power and beam *** analysis discovered that normalized enthalpy,which relates to energy input density,determines whether a molten track is initially unstable and if so,the growth rate for the ***,whether the growth rate ultimately yields significant undulation depends on the melt duration,estimated by dwell time in our experiment.

关键词： additive manufacturing powder bed fusion dual lasers undulation humping