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Integrated Geophysical and Geotechnical Investigations for Earth Dam along Dansak River, Upper Shemankar River Basin, Jos Plateau, Central Nigeria

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Journal of Earth Science and Engineering 2014年第8期4卷 470-483页

作者： Longpia cedric Bernard Dakwo Philip Datsok Pam Bulus Gwom Department of Mineral Resources Engineering Plateau State Polytechnic Barkin Ladi 931103 Nigeria Longpigr and Geotechnics Nigeria Ltd. Jos 930101 Nigeria Department of Civil Engineering Plateau State Polytechnic Barkin Ladi 931103 Nigeria

A total of 60 VES （geo-electrical resistivity soundings） and ten exploratory core holes （boreholes） were carried out along the axis of a proposed earth dam site as part of an overall geotechnical investigation for the design and construction of an earth dam along Dansak River, Shemankar River Basin, Jos Plateau, Nigeria. The geophysical interpretation revealed four to five geo-electric layers corresponding to lithologic units （1） topsoil from 0-2 m with a resistivity value of 〈 100-320 ohm-m, （2） weathered/slightly weathered basalt fi＇om 0.6 m to 20 m characterized by resistivity value of 27-130 ohm-m, followed by （3） basalt/fractured basalts with resistivity value of 130-400 ohm-m and （4） the basement rocks with resistivity value 〉 320 ohm-m to 3,021 ohm-m. Exploratory borehole drilling encountered a series of lithologic units viz： overburden （clay, silt and sand） weathered basalt, slightly weathered basalt, fresh/fractured basalts, weathered migmatite and migmatites/migmatite gneiss. Exploratory core analysis in terms of CR （core recovery） and RQD （rock quality designation） revealed an average of 70%-90% and 75%-90%, respectively. Lugeon test gave Lugeon values of 1-5 for the ten core holes. However, fractures with Lugeon value from 〉 5-15 lugeon were encountered on borehole numbers BH 1, 7, 8, 9 and 10. Grouting is recommended to seal this shallow to medium depth （0-15 m） fractures to reduce or eliminate possible seepage when the dam is constructed. The rock mass index grading for the dam axis ranges from good to excellent.

关键词： Geo-electrical resistivity geotechnical Dansak River rock quality designation rock mass index Lugeon test.

High Frequency Roughness Scattering from Various Rough Surfaces: Theory and Laboratory Experiments

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Open Journal of Acoustics 2012年第1期2卷 50-59页

作者： Virginie Jaud Jean-Pierre Sessarego cedric Gervaise Yann Stephan GIPSA-LAB SIGMAPHY National Center for Scientific Research Grenoble France LMA French National Centre for Scientific Research Marseille France Passive Acoustics Superior National School of Advanced Techniques of Brittany Brest Franc The Naval Hydrographic and Oceanographic Service Brest France

The scattering strength of isotropic and anisotropic rough surfaces was experimentally and theoretically investigated for high frequencies about 500 kHz. Emphasis was placed on studying the response from three two-dimensional rough surfaces which roughness was either isotropic (characterized by a Gaussian distribution) or anisotropic (characterized by a modified-sine surface). Theoretical predictions rely on the first-order small slope approximation either including a Gaussian structure function or a quasi-periodic structure function. The combination of true data and theoretical results indicates the importance of taking into account the anisotropy of a surface in a scattering prediction process. It is shown that the scattering strength varies a lot depending on the propagation plane. In the longitudinal direction of ripples, scattering strength is mostly in the specular direction, whereas in the transversal direction of the ripples, the scattering strength is spread in a very different way related to the particular features of the ripples, with several maxima and minima independent of the specular direction. Contrary to the isotropic surface, the scattering strength from an anisotropic rough surface is modified from one propagation plane to another, which explains why the entire rough surface should be taken into account without any simplification as it is often seen when dealing with scattering models. Compared to such a surface, positions of the emitter and of the receiver are naturally significant when measuring scattering strength.

关键词： Bistatic Scattering Tank Experiment Anisotropic and Isotropic Roughness

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基于旋风式烘干机的油菜籽干燥工艺优化

食品与机械 2017年第5期33卷 109-113页

作者：吕磊吴明亮 cedric 谢伟向伟湖南农业大学工学院长沙410128 南方粮油作物协同创新中心长沙410128 湖南省现代农业装备工程技术研究中心长沙410128

为探索油菜籽单位时间失水率影响因素,研究旋风式干燥方式下油菜籽的最佳干燥工艺参数,利用自制的旋风式油菜籽烘干机进行干燥试验。选取旋风式烘干机的干燥温度、气流速度、分级器内孔直径为主要因素进行单因素和多因素旋转正交试验。... 详细信息

为探索油菜籽单位时间失水率影响因素,研究旋风式干燥方式下油菜籽的最佳干燥工艺参数,利用自制的旋风式油菜籽烘干机进行干燥试验。选取旋风式烘干机的干燥温度、气流速度、分级器内孔直径为主要因素进行单因素和多因素旋转正交试验。单因素试验发现旋风式烘干机的干燥温度、气流速度、分级器内孔直径3因素是影响油菜籽单位时间失水率的主要因素,其取值范围为:干燥温度70~90℃,气流速度17~22 m/s、分级器内孔直径130~140mm;多因素试验表明,影响油菜籽单位时间失水率的因素显著性顺序为:干燥温度>气流速度>分级器内孔直径;旋风式干燥方式下油菜籽的最佳干燥工艺参数为干燥温度85℃、气流速度19m/s、分级器内孔直径136mm。

关键词：油菜籽烘干机旋风分级器

Small bowel capsule endoscopy:Where are we after almost 15 years of use?

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World Journal of Gastrointestinal Endoscopy 2015年第1期7卷 13-36页

作者： cedric Van de Bruaene Danny De Looze Pieter Hindryckx Department of Gastro-enterology University Hospital Ghent9000 GhentBelgium

The development of capsule endoscopy(CE) in 2001 has given gastroenterologists the opportunity to investigate the small bowel in a non-invasive way. CE is most commonly performed for obscure gastrointestinal bleeding, but other indications include diagnosis or follow-up of Crohn's disease, suspicion of a small bowel tumor, diagnosis and surveillance of hereditary polyposis syndromes, Nonsteroidal anti-inflammatory drug-induced small bowel lesions and celiac *** fifteen years have passed since the release of the small bowel capsule. The purpose of this review is to offer the reader a brief but complete overview on small bowel CE anno 2014, including the technical and procedural aspects, the possible complications and the most important indications. We will end with some future perspectives of CE.

关键词： Capsule endoscopy Small bowel Preparation Procedure Technology Complications Features Enhancements Indications Future

Impact of Commercial Organic Ameliorants on Nitrogen and Phosphorus Concentrations of Maize Biomass at Ninth Leaf and Silking Growth Stages

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Journal of Geoscience and Environment Protection 2023年第5期11卷 102-125页

作者： Tlangelani cedric Baloyi Funso Raphael Kutu Christiaan Cornelius du Preez ARC-Grain Crops Potchefstroom South Africa Department of Soil Crop and Climate Sciences University of the Free State Bloemfontein South Africa

The response of grain yield, biomass yield and harvest index of maize to the application of commercial organic ameliorants was inconsistent and poor. Hence it was hypothesized that the supply of N and P to maize plants was inadequate during vegetative growth, resulting in low concentrations of the two nutrients in maize biomass. The effects of nine ameliorants on the N and P concentrations of maize plants at ninth leaf (V9) and silking (R1) stages of maize were studied over three years at Bothaville (8% clay), Ottosdal (12% clay) and Potchefstroom (34% clay). All ameliorants were applied as prescribed by manufacturers. The N and P concentrations in maize biomass of the ameliorants at V9 and R1 were lower, comparable or higher, showing that the inconsistent and poor response of yield parameters can not be ascribed to inadequate uptake of N and P. A matter of concern that justifies thorough investigation, is the prescribed use of Crop care and Growmor with partial and of Montys and Promis with no NPK fertilization, an unsustainable practice over the long term. Characterization of the active ingredient(s) of the ameliorants is deemed also of importance for better insight.

关键词： Field Trials Grain Yield Primary Nutrients Reproductive Growth Vegetative Growth

Psychiatric Expertise in Benin Penal Justice Context: What Do They Reveal?

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Open Journal of Psychiatry 2020年第1期10卷 1-8页

作者： Francis Tognon cedric Bigot Yves Amonles Feldia Adéossi Unit of Psychiatry Faculté de Médecine Parakou Benin Department of Medicine Facultés de Sciences de la Santé Cotonou Benin

In this study, the authors describe the profile of people seen in criminal psychiatric expertise in northern Benin and their results. It covered the 138 psychiatric assessments carried out as part of criminal proceedings in the years 2017 and 2018. Expertises were on men in 94.9% of the cases. They were over 30 years old in 66.2% of cases. They were prosecuted for blood crimes in 89.5% of cases. The defendants were in detention at the time of the expert in 87.5% of cases. Psychiatric experts diagnosed a psychiatric disorder in 22.8% of cases. There was a relationship between the identified psychiatric disorder and the offense that motivated the charge in 25.8% of the mental disorder cases. It was exclusively cases of psychotic disorders. There was an abolition of discernment in 3.8% of the accused.

关键词： Psychiatric Expertise Criminal Responsibility Psychoses Forensic Psychiatry Dangerousness

An Active Inrush Current Limiter Based on SCR Phase Shift Control for EV Charging Systems

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Journal of Energy and Power Engineering 2016年第4期10卷 247-257页

作者： cedric Reymond Sebastien Jacques Ghafour Benabdelaziz Jean-Charles Lebunetel Application and System Engineering STMicroelectronics Tours SAS Tours 3 7000 France Research Group on Materials Microelectronics Acoustics & Nanotechnology University of Tours Tours 37200 France

This article gives an overview of the main passive solutions and active techniques, based on AC switches to limit inrush currents in medium power AC-DC converters （up to 3.7 kW） for electric vehicle charging systems. In particular, a strategy, based on SCR （silicon controlled rectifier） phase, shift control in a mixed rectifier bridge with diodes and thyristors, is proposed. The challenge is to help designers optimize the triggering delay of SCRs to both limit the peak value of inrush current spikes and optimize the charge duration of the DC-link capacitor. A mathematical model （Mathcad engineering tool） has been defined to point out, the interest of a variable triggering delay to control SCRs to meet the expectations described previously. Experimental measurements using an industrial evaluation board of the AC-DC converter demonstrate the robustness of the method.

关键词： EV charger AC-DC converter inrush current limiter SCR phase shift control.

The Gerbode Defect: About 2 Cases

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World Journal of Cardiovascular Surgery 2020年第7期10卷 115-121页

作者： Amine Majdoub Anas Elhafidi cedric Mutuale Salaheddine Boulmakoul Mohammed Messouak Faculty of Medicine and Pharmacy of Fez Department of Cardiovascular Surgery Sidi Mohammed Ben Abdellah University CHU HASSAN II FEZ Fez Morocco

Background: Left ventricular to right atrial communications (LV-RA) or the Gerbode defects are rare and complex types of ventricular septal defect. Their clinical diagnosis is not specific. However, the main clue to identifying Gerbode defect comes from Doppler-coupled echocardiography (TTE), and the treatment is mainly surgical. Aim: We hereby report our experience in surgical management of Gerbode defect through two exceptional congenital cases (type 1 and type 2 of Gerbode defect). Case Presentation: The diagnosis was established in adult patients, the first case is a 27-year-old woman who had dyspnea, and in whom the TTE revealed LV-RA communication, with repercussions on the right cavities. The second case is a 23-year-old

关键词： Congenital Disease Ventricular Septal Defect Cardiopulmonary Bypass

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柔性复合型导电高聚物传感器的设计

纺织导报 2008年第8期 92-94页

作者：张奕俞建勇 cedric Cochrane 东华大学纺织学院东华大学纺织面料技术教育部重点实验室东华大学现代纺织研究院东华大学纺织面料技术教育部重点实验室 Laboratoire de Génie et Matériaux Textiles(GEMTEX)

为了解决传统传感器不能与织物很好集成的问题,设计了一种应用在滑翔伞篷布上的能够测量滑翔伞布受力的柔性复合型导电聚合物传感器,用溶剂法制备炭黑添加型聚合物基的复合材料,并经电阻率的测试实验得到最佳炭黑含量,通过实验找到织物... 详细信息

为了解决传统传感器不能与织物很好集成的问题,设计了一种应用在滑翔伞篷布上的能够测量滑翔伞布受力的柔性复合型导电聚合物传感器,用溶剂法制备炭黑添加型聚合物基的复合材料,并经电阻率的测试实验得到最佳炭黑含量,通过实验找到织物受力与传感器导电性之间的关系。

关键词：传感器复合型导电高聚物设计柔性炭黑含量测试实验导电聚合物