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Health 2014年第18期6卷 2408-2415页

作者： Sébastien Champion Bernard A. Gaüzère David Vandroux Bruno J. Bouchet Didier Drouet yannick lefort Réanimation Polyvalente CHU de la Réunion H&ocirc pital Félix Guyon Saint Denis France

Objective: Prognostic analysis of 249 patients admitted for cardiogenic shock (CS) of various origins. Background: Little is known about prognosis of CS from non-ischemic cardiomyopathy. Methods: Retrospective monocentric study of patients referred to an ICU during 2 years. Results: Despite aggressive management including intra-aortic balloon pump (31%), extra-renal replacement therapy (36%), extra-corporeal life support (8%), and catecholamine infusion (97%), in-hospital mortality was 46%. Toxic CS or CS related to deficiency carried a better outcome (mortality 5%). Post-myocardial infarction or post-cardiac arrest CS was associated with higher mortality. In the multivariate analyses, only SAPS II (OR 1.037;1.013 - 1.056;p = 0.0001), pulmonary hypertension (OR 4.8;1.3 - 17;p = 0.02), extra-renal replacement therapy (OR 2.9;1.3 - 6;p = 0.006), and dobutamine infusion (OR 0.44;0.2 - 0.96;p = 0.04) were significantly associated with in-hospital mortality. Conclusion: Dobutamine infusion was associated with a better outcome. Higher SAPS II, pulmonary hypertension, and extra-renal replacement therapy were associated with increased in-hospital mortality.

关键词： Cardiogenic Shock Myocardial Infarction Catecholamine Pulmonary Hypertension Dobutamine Critically Ill

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

Aligning National Interests and Global Climate Justice:The Role of Human Rights in Enhancing the Ambition of Nationally Determined Contributions to Combat Climate Change

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Fudan Journal of the Humanities and Social Sciences 2019年第2期12卷 309-327页

作者： yannick Glemarec UN Women New YorkUSA

The Paris Agreement on climate change revolves around nationally determined contributions(NDC)and acknowledges that the ambition of the global climate response will be determined by Parties’understanding of their national *** currently envisaged in NDCs are insufficient to avoid disastrous climate *** about the impact of climate action on economic development and national interests have abated the climate ambition of some *** modeling approaches have contributed to these *** scale up global climate efforts,it will be essential to convince Parties that the short-term benefits of robust national climate action outweigh its immediate *** is driving progress to address climate change and can deliver substantial development co-benefits,particularly by reducing costs of renewable energy technologies and enabling new business ***,innovation can take many years to reach deployment stage,can create unforeseen problems of its own,and does not benefit all *** justice links human rights,development and climate regimes.A climate justice perspective provides a normative,analytical and procedural framework to identify barriers to innovation diffusion,optimize development co-benefits of climate action and help build public support for the adoption of more ambitious NDC pledges.

关键词： Climate change Development co-benefits-Innovation Human rights

Symmetrization for Fractional Elliptic and Parabolic Equations and an Isoperimetric Application(Dedicated to Haim Brezis,great master of analysis,on his 70th birthday)

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Chinese Annals of Mathematics,Series B 2017年第2期38卷 661-686页

作者： yannick SIRE Juan Luis VAZQUEZ Bruno VOLZONE johns hopkins university Krieger Hall3401 N.Charles StBaltimoreM D21218USA. departamento de matemticas universidad autnoma de madrid28049 M adridSpain dipartimento di ingegneria universit degli studi di napoli"parthenope"80143 Italia.

This paper develops further the theory of symmetrization of fractional Laplacian operators contained in recent works of two of the authors. This theory leads to optimal estimates in the form of concentration comparison inequalities for both elliptic and parabolic equations. The authors extend the theory for the so-called restricted fractional Laplacian defined on a bounded domain Ω of R^N with zero Dirichlet conditions outside of Ω. As an application, an original proof of the corresponding fractional Faber-Krahn inequality is derived. A more classical variational proof of the inequality is also provided.

关键词： Symmetrization, Fractional Laplacian, Nonlocal elliptic and parabolicequations, Faber-Krahn inequality

In vivo astrocyte reprogramming following spinal cord injury

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Neural Regeneration Research 2024年第3期19卷 487-488页

作者： yannick N.Gerber Florence E.Perrin MMDN University of MontpellierEPHEINSERMMontpellierFrance Institut Universitaire de France(IUF) ParisFrance

Harmful and helpful roles of astrocytes in spinal cord injury(SCI):SCI induce gradable sensory,motor and autonomic impairments that correlate with the lesion severity and the rostro-caudal location of the injury *** absence of spontaneous axonal regeneration after injury results from neuron-intrinsic and neuron-extrinsic ***,not only adult neurons display limited capability to regrow axons but also the injury environment contains inhibitors to axonal regeneration and a lack of growth-promoting *** other cell populations that respond to the lesion,reactive astrocytes were first considered as only detrimental to spontaneous axonal ***,astrocytes.

关键词： injury impairment programming

Spallation Process of Thermally Grown Oxides by In-Situ CCD Monitoring Technique

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Journal of Iron and Steel Research International 2009年第6期16卷 90-94页

作者： QI Yu-hong Philippe Lours yannick Le Maoult Materials Science and Engineering Department Dalian Maritime University Dalian 116026 Liaoning China Research Centre on Tools Materials and Processes Ecole des Mines 81013 Albi France

In cooling process of Fe-Cr-Al alloy oxidized at 1 300 ℃, the effect of cooling speed and exposure time on oxide spalled area fraction and successive variety of the spalled region were studied by investigating evolvement of the thermally grown oxide using in-situ CCD monitoring technique. The results showed that oxide spallation can be restrained by controlling cooling speed and the critical temperature drop of spallation initiation which is closely related to the oxide thickness or exposure time, and the spallation process of a little region may be described in more detail as two routes： from the oxide/substrate interface micro-decohesion, micro-buckles, buckle spreading, buckle crack to spallation and from the interface micro-decohesion, micro-buckles, buckle crack and spallation to the residual oxide decohesion and spallation.

关键词： in-situ CCD monitoring technique spallation thermally grown oxide Fe-Cr-AI

Functional attributes： Compacting vs decompacting earth- worms and influence on soil structure

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Current Zoology 2012年第4期58卷 556-565页

作者： Arnauth MartinezGUEI yannick BAIDAI Jerome Ebagnerin TONDOH Jeroen HUISING Universit6 Abobo-Adjam6 Sciences de la Nature/Centre de Recherche en Ecologie 08 BP 109 Abidjan 08 C6te d'Ivoire CIAT-TSBF Institut d'Economie Rurale CRRA de Sotuba Laboratoire Sol-Eau-Plante c/o Icraf Sahel BPE 5118 B amako Mali CIAT-TSBF Nairobi c/o ICRAF United Nations Avenue P.O. Box 30677-00100 Nairobi Kenya

A short term field mesocosm experiment was performed in semi-deciduous forest areas of Ivory Coast to assess the impact of a decompacting （Hyperiodrilus africanus, Eudrilidae） and two compacting （Millsonia omodeoi and Dichogaster terrae nigrae, Acanthodrilidae） earthworm species on soil properties. These species have been selected for their predominance in the re- gion and their contrasting impact on soil structure. The experimental design consisted of a treatment without worms （control）, and treatments with one, two or three species of earthworms. Both compacting and decompacting earthworms increased water infil- tration rate in all treatments, with marked impact in H. africanus and M. omodeoi＋D, terraenigrae treatments. Interactions be- tween compacting and decompacting species resulted in more large aggregates in comparison to when the compacting species D. terraenigrae was alone. This may be accounted for by their compacting attribute as compacting earthworms are responsible for producing the highest number of large aggregates. The low values of mean weight diameter in treatments combining decompact-ing and compacting earthworms compared with compacting ＂M. omodeoi＂ one also confirmed the trend of decline in soil com-paction in the presence of the decompacting species. These results showed positive impact of species richness on soil structure regulation, which is crucial in ecosystem productivity and support consequently the insurance hypothesis. In fact, this study showed that the preservation of earthworm species belonging to these two contrasting functional groups is essential for the main-tenance of stable soil structure regulation in agro-tropical ecosystems.

关键词： Earthworms Physical properties Compacting and decompacting species Mesocosms

Gas decomposition and electrode degradation characteristics of a 20%C_(3)F_(7)CN and 80%CO_(2) gas mixture for high voltage accelerators

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High Voltage 2021年第5期6卷 750-759页

作者： Ibrahim Iddrissu Qinghua Han Lujia Chen Louis Maksoud yannick Kieffel Department of Electrical and Electronic Engineering The University of ManchesterManchesterUK Materials Research Department General ElectricGrid Solutions SASVilleurbanneFrance

Sulphur hexafluoride(SF_(6))is a potent greenhouse gas used in high voltage *** a promising alternative to SF_(6),the C_(3)F_(7)CN/CO_(2)gas mixture and its by‐products are of great interest to ensure the safe operation of accelerators that will adopt any SF_(6)‐free *** work experimentally examines the electrical ageing characteristics of a 20%C_(3)F_(7)CN/80%CO_(2)gas mixture tested using spark gaps under a pressure of 7.2 bar(abs.).Gas samples were collected after 1000 DC breakdowns and analysed using gas chro-matography mass spectrometry(GC‐MS)with an estimated toxicity value of 54,459 ppmv,which indicates the aged mixture to be non‐*** investigation was conducted on the gas‐solid interface after 500 breakdowns for both SF_(6) and the 20%C_(3)F_(7)CN/80%CO_(2)gas *** electrodes were analysed using X‐ray photoelec-tron spectroscopy(XPS)and X‐ray diffraction(XRD)*** surface analysis revealed the formation of metal fluorides on the electrode surface tested using the 20%C_(3)F_(7)CN/80%CO_(2)mixture,whereas metal fluorides and sulphides were detected for electrodes tested with SF_(6).The findings provide a reference on the toxicity and gas‐solid interaction of the electrically aged 20%C_(3)F_(7)CN/80%CO_(2)gas mixture for potential retro‐fill application in high voltage accelerators.

关键词： mixture electrode characteristics

On Well-Posedness of 2D Dissipative Quasi-Geostrophic Equation in Critical Mixed Norm Lebesgue Spaces

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Analysis in Theory and Applications 2020年第2期36卷 111-127页

作者： Tuoc Phan yannick Sire Department of Mathematics University of Tennessee227 Ayres Hall1403 Circle DriveKnoxvilleTN 37996-1320USA Department of Mathematics Johns Hopkins University404 Krieger Hall 3400 N.Charles StreetBaltimoreMD 21218USA

We establish local and global well-posedness of the 2D dissipative quasigeostrophic equation in critical mixed norm Lebesgue *** result demonstrates the persistence of the anisotropic behavior of the initial data under the evolution of the 2D dissipative quasi-geostrophic *** phenomenon is a priori nontrivial due to the nonlocal structure of the *** approach is based on Kato’s method using Picard’s interation,which can be apdated to the multi-dimensional case and other nonlinear non-local *** develop time decay estimates for solutions of fractional heat equation in mixed norm Lebesgue spaces that could be useful for other problems.

关键词： Local well-posedness global well-posedness dissipative quasi-geostrophic equation fractional heat equation mixed-norm Lebesgue spaces

Regularity of Inhomogeneous Quasi-Linear Equations on the Heisenberg Group

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Analysis in Theory and Applications 2021年第4期37卷 520-540页

作者： Shirsho Mukherjee yannick Sire Department of Mathematics University of BolognaPiazza di Porta San Donato 540126-Bologna(BO)Italy Department of Mathematics Johns Hopkins University3400 N.Charles StreetBaltimore MD 21218USA

We establish Holder continuity of the horizontal gradient of weak solu-tions to quasi-linear p-Laplacian type non-homogeneous equations in the Heisenberg Group.

关键词： Non-homogeneous