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The Hidden Side of the Story between the Placenta and Preeclampsia: Preliminary Results of a Prospective Cohort of Pregnant Women in Cameroon

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 610-620页

作者： Junie Annick Metogo Ntsama Ambroise Merci Engounou Seme Urielle Julie Tchuente Sutchueng Wilfried Loic Tatsipie Christian Vagoda Henry-Leonard Chatelin Mol Madye Ngo Dingom Felix Essiben Cyrille Claude Noa Ndoua yann chris Eng Odile Fernande Zeh Faculty of Medicine and Biomedical Sciences University of Yaound&#233 I Yaound&#233 Cameroon Faculty of Medicine and Pharmaceutical Sciences University of Dschang Dschang Cameroon

Introduction: Pre-eclampsia is a complication of pregnancy that generally occurs in the third trimester. It is associated with a maternal and foetal mortality rate of around 27%. In view of the grim picture painted by this condition for both mother and newborn, studies have been carried out into the early detection of patients at risk of developing pre-eclampsia. These make it possible to introduce pregnancy-specific monitoring and preventive strategies to reduce the incidence of the condition. Objective: To establish the link between placental ultrasound characteristics and the onset of pre-eclampsia. Methodology: A multicentre prospective cohort study was conducted in two hospitals in Yaoundé, namely the Yaoundé Gynaecological Obstetrics and Paediatrics Hospital and the Nkolndongo Health and Social Animation Centre, in the gynaecology and radiology departments over a period of 11 months, from October 2022 to August 2023. It included pregnant women who had undergone obstetric ultrasound between 12 and 18 weeks’ gestation. In addition to routine obstetric ultrasound, we performed obstetric Doppler measurements in these patients. The resistance index of the left and right uterine arteries, the umbilical artery and the placental volume were the characteristics sought. At the end of this examination, two groups were formed: cases (pathological Doppler group) and controls (normal Doppler group). Blood pressure and urine dipstick were taken at each antenatal visit until delivery, then during the immediate postpartum period and finally at 7 days, 21 days and 42 days after delivery. Results: Sixty-seven (67) patients were included. Of these, 35 (47.8%) had pathological Dopplers. Sixteen patients had arterial hypertension associated with proteinuria and were therefore labelled as pre-eclampsia (PE). This gives a prevalence of 23.9%. Fifteen (42.8%) of these patients belonged to the exposed group and one to the unexposed group. The mean IR of the pre-eclampsia patients was s

关键词： Pre-Eclampsia Doppler Ultrasound Placenta

Sediment bed destabilization by an isolated vortex:an experimental approach

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Journal of Hydrodynamics 2021年第2期33卷 370-385页

作者： yann Devaux Lionel Thomas Damien Calluaud Gérard Pineau Institut Pprime CNRS-Universitéde Poitiers-ISAE-ENSMA-UPR 3346PoitiersFrance

The destabilization of an erodible sediment bed by a reproducible impulsive phenomenon is studied *** this,a specific setup is designed to produce a well-controlled isolated vortex,advected over a uniform sand *** image velocimetry(PIV)measurements are performed to get fluid flow information;suspended particles images are also recorded.A new measurement technique,based on a stereo-correlation method,provides a precise reconstruction of the bedform morphology over *** turbulent structures(namely sweep events)are evidenced in a near-wall region,where particles are mainly *** sediment plume follows the vortex:in particular,the upward velocity inside maintains the suspension ***,the dispersion process seems to be not dependent on the vortex ***,the bed morphology is investigated:a scour hole is dug as the vortex hits the granular *** dynamics is described by a typical scour law,even if the initial perturbation is *** area,where the particles settled,can be observed:it behaves like a ripple,with a logarithmic growth of its *** deposition region has a specific geometry,studied here by a Fourier contour ***,a pickup rate is also derived from the morphological data:it appears independent of the vortex and bedform features.

关键词： Sediment plume isolated vortex stereo-correlation particle image velocimetry(PIV) bedform dynamics

Dyspeptic disorders and eosinophilia due to ancylostomiasis:a case report

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Asian Pacific Journal of Tropical Medicine 2009年第1期2卷 76-77页

作者： yann A.Meunier Stanford Prevention Center Hoover Pavilion211 Quarry Road StanfordCA94305-5705

We present the case of a 41-year old man who consulted for dyspeptic disorders and presented with eosinophilia after a trip to *** diagnosis of ancylostomiasis was made by a parasitological stool *** treatment by fluo... 详细信息

关键词： Ancylostomiasis Dyspeptic disorders Eosinophilia Senegal

Asymptomatic eosinophilia due to enterobiasis in a child:A case report

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Asian Pacific Journal of Tropical Medicine 2008年第2期1卷 34-35页

作者： yann A.Meunier Brazilian Academy of Medicine Australasian College of Tropical Medicine Stanford Prevention Research Center

This paper reported the case of a 6-year old child who presented with an asymptomatic *** diagnosis of enterobiasis was established by a Graham anal scotch test and he was successfully treated with fluoromebendazole. ... 详细信息

关键词： Enterobiasis asymptomatic eosinophilia

Leg edema and painful gait in a Western African due to dracunculiasis:A case report

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Asian Pacific Journal of Tropical Medicine 2009年第2期2卷 72-73页

作者： yann A.Meunier Stanford Health Improvement Program Stanford School of Medicine1070 Arastradero RoadRm 3C03GPalo AltoCa 94304-1334

We present the case of a 28 year old man from Mali who came to consultation for " lower limb edema and painful gait".The diagnosis of dracunculiasis was established by the suggestive symptomatology and the notion of a... 详细信息

关键词： Leg edema Painful gait Dracunculiasis Mali

Object removal from complex videos using a few annotations

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Computational Visual Media 2019年第3期5卷 267-291页

作者： Thuc Trinh Le Andrés Almansa yann Gousseau Simon Masnou LTCI T′el′ecom ParisTechUniversit′e Paris-Saclay75013 ParisFrance MAP5 CNRS&Universit′e Paris Descartes75006 ParisFrance Univ Lyon Universit′e Claude Bernard Lyon 1CNRS UMR 5208Institut Camille Jordan69622 VilleurbanneFrance

We present a system for the removal of objects from videos. As input, the system only needs a user to draw a few strokes on the first frame, roughly delimiting the objects to be removed. To the best of our knowledge, this is the first system allowing the semi-automatic removal of objects from videos with complex backgrounds. The key steps of our system are the following: after initialization, segmentation masks are first refined and then automatically propagated through the video. Missing regions are then synthesized using video inpainting techniques. Our system can deal with multiple, possibly crossing objects, with complex motions, and with dynamic textures. This results in a computational tool that can alleviate tedious manual operations for editing high-quality videos.

关键词： object removal object segmentation object tracking video inpainting video completion

Production of Wood Fibers from Thermally Treated Wood

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Fluid Dynamics & Materials Processing 2022年第5期18卷 1427-1439页

作者： Maximilien Gibier Pierre Girods yann Rogaume Universitéde Lorraine INRAELERMABERBEEpinalF-88000France

The reduction of the hygroscopicity of wood fibers was investigated through a Thermal Treatment(TT)on wood chips performed before the defibering *** TT and defibering tests were both carried out on a continuous pilot at semi-industrial *** thermal treatment study of wood chips,equivalent to a low temperature pyrolysis,was achieved for four conditions(280°C–320°C)for a duration of 10 *** quantification of solids,condensables and gases(FTIR)at the outcome of the thermal treatment allowed to achieve the mass balances for each *** increase of the reactor temperature from 280°C to 320°C leads to a lower solid yield(94%–82%)while gaseous(1%–3.8%)and condensable(3%–11%)products increase *** treated wood samples were afterwards successfully defibered in different conditions to produce suitable fibers for insulation panel *** aim of the study is also to evaluate the effects of the TT on the lowering of energy consumption necessary for the defibering process while producing good quality *** consumption during defibering process shows a significant decrease with the increase the TT *** morphology is affected by TT and the morphological quality of the fibers decreases as TT severity *** mass percentage of dust was also quantified as a quality marker of produced *** of equilibrium moisture(at 20°C and 65%RH)of the different materials(wood chips before and after TT,produced fibers)show a significant effect of the TT on wood chips hygroscopicity(8.2%for untreated wood to 4.1%for TT at 320°C).However,the effect of the TT on the hygroscopicity reduction of thermally treated wood fibers is drastically less significant due to breaking of the wood structure during defibering process.

关键词： Wood fibers thermal treatment defibering process hygroscopicity energy consumption fibers properties improvement

Evolution of the 128-cm^(-1) Raman phonon mode with temperature in Ba(Fe_(1-x)Co_x)_2As_2(x=0.065 and 0.2)

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Chinese Physics B 2015年第2期24卷 399-402页

作者：杨彦兴 Gallais yann 方之颢石兢熊锐 School of Physics and Technology Wuhan University Laboratoire Matériaux et Phénomenes Quantiques(UMR 7162 CNRS) Université Paris Diderot-Paris 7

We report electronic Raman scattering measurements on Ba（Fei1-xCox）2As2（x = 0.065 and 0.2） single crystals with Raman shifts from 9 cm^-1 up to 600 cm^-1 in the symmetry of Blg with respect to 1 Fe unit *** the crystals are cooled down,the evident quasielastic peaks of Raman spectra occur only in the crystal with x = 0.065,which is due to the contribution of orbital ordering between xz and yz Fe 3d orbitals,as we reported in another ***,we analyze the Eg phonon at 128 cm^-1,which has the same function form of its Raman tensors as those of xz and yz Fe 3d orbitals in these two crystals *** their electronic continuums,no anomalies are found in the Eg phonons of these two samples,which simply follows the expressions corresponding to the anharmonic phonon decay into acoustic phonons with the same frequencies and opposite *** results indicate that the structural and magnetic phase transition might be completely suppressed by chemical doping and there is not any indication of coupling between charge nematicity and Eg phonon mode from our experimental results,which is consistent with the results in our previous work.

关键词： Raman scattering iron-based superconductor phonon mode

科学史教育赋能创新人才培养——材料科学发展史课程

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化学教育（中英文） 2024年第12期45卷 124-129页

作者：刘小丽许兴燕石建兵钟海政叶霖北京理工大学材料学院北京100081

创新人才培养是当前高等教育发展面临的重大命题。鉴于科学史对于创新人才培养的重要作用,北京理工大学材料学院面向材料类本科生,开设了“材料科学发展史——多学科的融合与创新”科学史通识教育选修课程,按照材料种类讲授材料发展史... 详细信息

创新人才培养是当前高等教育发展面临的重大命题。鉴于科学史对于创新人才培养的重要作用,北京理工大学材料学院面向材料类本科生,开设了“材料科学发展史——多学科的融合与创新”科学史通识教育选修课程,按照材料种类讲授材料发展史以及其背后的科学家故事。问卷调查结果表明,所开设的科学史课程对于坚定学生理想信念,培育创新意识和创新精神,激励他们积极参与创新和有意识提升自己的创新能力具有较大的作用。总结了科学史课程开设的主要目标、教学安排以及教学效果分析。

关键词：人才培养科学史材料科学学习主动性创新精神