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Relationship between the Guinea Current and the Coastal Upwelling in Northern of Gulf of Guinea

Open Journal of Marine Science 2024年第4期14卷 63-77页

作者： Sandrine Djakouré Youssouf Konaté Vamara Koné kouacou bosson Mamadou Koné Kouassi Yves Kouadio Laboratory of Matter Sciences Environment and Solar Energy (LASMES) University Felix Houphouet Boigny of Cocody-Abidjan Abidjan Cte dIvoire UFR of Marine Sciences University of San-Pdro San-Pdro Cte dIvoire Laboratory of Environmental Sciences and Techniques (LSTE) University Jean-Lorougnon Gud Daloa Cte dIvoire

The variability of ocean circulation and sea surface temperature (SST) in the tropical Atlantic, especially in the Gulf of Guinea (GG), defines this region as exceptionally rich from an oceanographic perspective. The Guinea Current (GC), as the major surface current, plays a significant role in marine productivity and coastal upwelling in the GG. This coastal upwelling is known to influence the climate of the surrounding region, primary productivity and local fisheries. Studies on GC variability and its impact on this coastal upwelling have highlighted that the upwelling downstream of Cape Palmas is influenced by GC detachment, topographic variations and advective processes leading to significant vertical mixing. This study aims to analyze the interannual variability of the GC and its impact on coastal upwelling using the Coastal and Regional Ocean COmmunity model (CROCO). The model’s evaluation is conducted using observational data, specifically Geostrophic and EKman Current Observatory (GEKCO) and Ocean Surface Current Analysis (OSCAR) for currents, and Air-sea Fluxes for the global Tropic ocean-description (TROPFLUX) and Optimum Interpolation-Sea Surface Temperature (OI-SST) for temperature. Thus, the model evaluation indicates that it accurately replicates ocean circulation and SST patterns in the tropical Atlantic and the GG. The joint analysis of upwelling indices (surface and intensity) and the position of the GC core allowed us to conclude that the displacement of the GC core does indeed influence the upwelling indices in the northern part of GG. However, other oceanic and atmospheric mechanisms such as vertical diffusion and horizontal advection as proposed by previous studies may also affect the year-by-year variability of coastal upwelling in the northern GG.

关键词： Guinea Current Sea Surface Temperature Coastal Upwelling Gulf of Guinea Tropical Atlantic Ocean

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Intergenerational Trauma and Resilience among Im/Migrant Families: Child Mental Health Outcomes and Psychosocial Mechanisms of Transmission

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Health 2024年第10期16卷 888-920页

作者： Maggie Gillen Annekathryn Goodman Fiona Danaher Rahel bosson Mary Greenwald Rashmi Jasrasaria Massachusetts General Hospital Department of Obstetrics and Gynecology Strength and Serenity: Global Initiative against Gender-Based Violence Boston Massachusetts USA Massachusetts General Hospital Center for Immigrant Health Boston Massachusetts USA

Research Background: Psychological stressors leading to poor mental health outcomes accumulate throughout the migration process. The impact of a parent or caregiver’s posttraumatic stress on non-traumatized children is significant and may lead to adverse development and mental health outcomes. Research Objectives: The objective of this review is to explore both the consequences of parental trauma transmission on descendants’ psychological adjustment and well-being, and the mechanisms through which trauma has been transmitted among im/migrant populations. Methods: Criteria outlined in the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement guided this systemic review. The questions guiding this review are: (a) What are the consequences of parental trauma transmission on the psychological adjustment and well-being of im/migrant offspring? And (b) What are the psychosocial mechanisms of trauma and resilience transmission among im/migrant populations? Each potential study was assessed based on relevance to the review question(s). Results: Parental trauma can lead to adverse mental health outcomes among descendants including increased internalizing and externalizing problems, the adoption of coping behaviors and worldviews, and worsening school performance. Mechanisms that influence trauma transmission include parental trauma symptom severity, the parent-child dyad, social learning, and family stressors. Pathways of resilience exist across socioecological levels to include individual resilience such as coping skills and meaning making, family resilience, structural protective factors, and social and cultural protective factors. Conclusions: Despite the prevalence of traumatic events throughout the migration process, im/migrant families display strong levels of resilience. Mental health services and providers should incorporate a strength-based approach in designing interventions that are culturally responsive and take into accounts the b

关键词： Intergenerational Trauma Im/Migrants Families Resilience Mental Health

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Double Autocorrelation in Two Way Error Component Models

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Open Journal of Statistics 2011年第3期1卷 185-198页

作者： J. M. bosson Brou Eugene Kouassi Kern O. Kymn 不详

In this paper, we extend the works by [1-5] accounting for autocorrelation both in the time specific effect as well as the remainder error term. Several transformations are proposed to circumvent the double autocorrel... 详细信息

关键词： Two Way Random Effect Model Double Autocorrelation GLS FGLS

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Non-Medical Determinants of Caesarean Deliveries in Ghana: A Logistic Regression Approach

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Open Journal of Applied Sciences 2019年第6期9卷 492-505页

作者： Ernest Yeboah Boateng Senyefia bosson-Amedenu Ezekiel Nii Noye Nortey Daniel A. Abaye Department of Basic Sciences School of Basic and Biomedical Sciences University of Health and Allied Sciences Ho Ghana Department of Mathematics and ICT Holy Child College of Education Takoradi Ghana Department of Statistics and Actuarial Science University of Ghana Legon Accra Ghana

This study examined the non-medical factors that influence expectant mothers to opt for caesarean deliveries in Ghana. Data on 395 expectant mothers across the ten regions of Ghana who were located in urban, semi-rural and rural areas, and spanned a period of five years (from 2012 to 2016) were obtained from the Ghana Health Service. In fitting the logistic regression model, data on 355 expectant mothers (i.e. 89.9% of the data) was assigned to the analysis sample while 40 (i.e. 10.1%) was assigned to the hold-out sample. The hold-out sample together with other statistical measures of overall model fit, pseudo R2 measures and classification accuracy were used to validate the results obtained from the analysis sample. Significance was tested at p = 0.05. Determinants including, educational level of expectant mother, parity of expectant mother, baby’s birth weight, previous caesarean delivery, location of expectant mother, age of expectant mother and, period within the year of childbirth had a significant effect on caesarean delivery. The study recommended that health practitioners should be able to foretell expectant mothers who are likely to undergo caesarean delivery in order for them to prepare financially and psychologically to avoid further complications. Due to the significant positive attitude of women towards caesarean delivery rather than normal delivery, it is necessary to inform them about the advantages of normal delivery and the health hazards associated with caesarean delivery to the mother and child.

关键词： Caesarean Deliveries Non-Medical Determinants Logistic Regression Ghana

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Anti-Hemorrhoidal Medicinal Plants of the Department of Issia: Inventory and Cytotoxicity on HFF Cells of the Ethanolic Extract 70% of Landolphia utilis A. Chev. (Apocynaceae)

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Journal of Biosciences and Medicines 2019年第11期7卷 101-110页

作者： Coulibaly Kiyinlma Etien Dibie Theodore Orso bosson Arobia Marie Bernadine Kanga Yao Zirihi Guede Noel Department of Plant Biology UFR Sciences BiologiquesUniversite Peleforo Gon CoulibalyKorhogoCote d’Ivoire Botany Laboratory UFR BiosciencesFelix Houphouet Boigny University of CocodyAbidjanCote d’Ivoire

Objective: To identify the anti-hemorrhoidal medicinal plants of the Department of Issia and evaluate the cytotoxic activity of the most requested species. Methods: The plants used in hemorrhoid recipes in the Department of Issia (C?te d’Ivoire) were obtained using a semi-structured survey based on a questionnaire sheet. To assess the use of plants on the disease, Informant Consensus Factors (ICF) for each species were calculated. The harvested species were identified at the Centre National de Floristique (CNF) of the Félix Houphou?t Boigny University (C?te d’Ivoire). Cytotoxicity tests were performed on HFF cells with the 70% ethanolic extract, prepared from the aqueous extract of the most cited species. Results: A total of twenty four medicinal species in eighteen families were recorded. Among these taxa are ten woody and fourteen herbaceous. Only three species gave an ICF greater than 0.5. The ethanolic extract 70% of the frequently requested medicinal plant did not reveal any toxicity on HFF cells. Conclusion: These results revealed that the flora of the Department of Issia is rich in anti-hemorrhoidal medicinal plant species. Their use without side effects is revealed by the absence of toxicity in one of the most solicited plants.

关键词： Hemorrhoids ICF Medicinal Plants Tradipractitioners

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Structured Imagery Processing Strategies for Spectroscopic Measurement in Dense Solutions

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Open Journal of Applied Sciences 2017年第6期7卷 262-281页

作者： Thomas Koffi Guy-Oscar Regnima Jocelyne bosson Olivier Bagui Mensah Edoé Jérémie T. Zoueu Laboratoire d’Instrumentation Image et Spectroscopie(L2IS) Institut National Polytechnique Felix Houphou&euml t-Boigny Departementde Formation et de Recherche du Genie Electrique et Electronique Yamoussoukro C&ocirc te d’Ivoire Laboratoire de physique Fondamantale Appliquée(LPFA) Université NanguiAbrogoua Unité de Formation et de Recherche des Sciences Fondamentales Appliquées Abidjan C&ocirc te d’Ivoire

Absorbance measurement in dense media via conventional optical spectroscopy techniques leads to inaccurate results. This is mainly due to multiple scattering phenomena that contribute to the overall light extinction in the interrogated sample. This limitation imposes the use of dilute solutions for absorption spectroscopy. However, depending on the polarity of the solvent used, the absorption spectrum may vary over a given solution. Structured illumination technique offers an alternative to this problem, and provides the ability to calculate in-situ optical properties in dense media. In this paper, we propose two processing methods applied to images acquired by structured laser illumination planar imaging (SLIPI) technique to extract extinction coefficients μ_e of probed solutions: The first is based on the implementation of principal component analysis (PCA) and the second, on the calculation of Mean Value. In practice, two kinds of studies were carried out: one quantitative set of measurements within chlorophyll liquid solutions and a second set with concentrated coffee solutions, with controlled proportion and concentrations for each sample. These two proposed analytical techniques are advantageous because they are very easy to implement and provide a much simpler alternative to the previous one. Both methods offer satisfactory results, similar to those obtained with the original method which is based on 1D Fourier transform.

关键词： Spectrophotometry Dense Media Extinction Coefficient Structured Illumination Principal Component Analysis

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Use of Fluorescence and Reflectance Spectra for Predicting Okra (<i>Abelmoschus esculentus</i>) Yield and Macronutrient Contents of Leaves

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Open Journal of Applied Sciences 2017年第10期7卷 537-558页

作者： Wilfried G. Dibi Jocelyne bosson Irié Casimir Zobi Bi Tra Tié Jérémie T. Zoueu Laboratoire d’Instrumentation Image et Spectroscopie Unité Mixte de Recherche et d’Innovation en Electricité et Electronique Appliquées Ecole Supérieure d’Industrie Institut Nationale Polytechnique Houphouet-Boigny Yamoussoukro C&ocirc te d’Ivoire Laboratoire de Physique Fondamentale et Appliquée Unité de Formation et de Recherche en Sciences Fondamentales et Appliquées Université Nangui Abrogoua Abidjan C&ocirc te d’Ivoire Laboratoire de Pédologie Ecole Supérieure d’Agronomie Institut Nationale Polytechnique Houphouet-Boigny Yamoussoukro C&ocirc te d’Ivoire

In-field proximal sensing of most major crops nutrients still remains an economical and technical challenge. For this purpose, the use of effective multi-excitation fluorescence and reflectance wavelengths is explored in this work on Okra plant. Visible-near infrared (400 - 1000 nm) reflectance and multi-fluorescence data were collected at leaf scale in a chemically fertilized field by using an USB spectrometer mounted with an Arduino-based LED driver clip. N, P, K and Ca content of samples leaves were measured using reference methods. Average pods yield and leaves macronutrients content were calibrated using IRIV-PLS regression after spectra pretreatments. Single informative wavelengths bands in reflectance, red and far-red fluorescences were selected for building yield and macronutrient content models. We showed that flowering stage was more suitable for yield prediction. Moderately useful macronutrient models were found in Ca content (RPDval = 1.93, rP = 0.818) and potassium content with RPDval = 1.8, rP = 0.88. P and N yielding prediction performance of RPDval = 1.61 (rP = 0.718 ) and RPDval = 1.46 (rP = 0.56) respectively were less accurate. This study demonstrates potentiality of fluorescence and reflectance spectroscopy for accurate estimation of leaf macronutrient content and crop yield. High selectivity obtained from resulted spectral bands could lead to the development of reliable, rapid and cost-effective devices for nutrient diagnosis.

关键词： Proximal Sensing Fluorescence and Reflectance Fertilized Field Macronutrients Content Pods Yield

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HM60发动机涡轮泵的初步结构

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导弹与航天运载技术 1984年第1期 13-20页

作者： F.Lafont R.bosson 袁耀章

本文叙述HM60发动机两台涡轮泵的基准结构。液氧涡轮泵由一个诱导轮,一级离心叶轮和单级冲动悬臂涡轮组成。液氧冷却的前轴承位于诱导轮和主叶轮之间,后轴承用液氢冷却,一道氦气吹除密封隔开两种推进剂;氧涡轮泵的轴是亚临界轴。液氢涡... 详细信息

本文叙述HM60发动机两台涡轮泵的基准结构。液氧涡轮泵由一个诱导轮,一级离心叶轮和单级冲动悬臂涡轮组成。液氧冷却的前轴承位于诱导轮和主叶轮之间,后轴承用液氢冷却,一道氦气吹除密封隔开两种推进剂;氧涡轮泵的轴是亚临界轴。液氢涡轮泵由一个诱导轮,两级离心叶轮和两级涡轮组成;前轴承位于诱导轮和第一级主叶轮之间,而后轴承则在涡轮外侧,两个轴承均用氢冷却。氢涡轮泵的轴是超临界轴。

关键词：诱导轮轴承轮(机械元件) 离心叶轮涡轮泵透平泵化工用泵 HM60 发动机

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水流程的分析:瑞典一个潜在地质埋藏点的研究方法和计算实例

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AMBIO－人类环境杂志 2006年第8期35卷 417-426页

作者： Kent Werner Emma bosson Sten Berglund 林宝法（译）胡恩和（校）瑞典斯德哥尔摩Golder Associates公司瑞典斯德哥尔摩的瑞典核燃料及废料管理公司不详

与深处于基岩中的核废料地质埋藏点的选址有关的安全评估需要确定潜在的流程及起源于埋藏点深度的放射性核素的相关传播时间。利用瑞典Laxemar候选场所作为案例研究,本文描述了模拟方法、数据集成以及由此而产生的水流模型,重点放在第... 详细信息

与深处于基岩中的核废料地质埋藏点的选址有关的安全评估需要确定潜在的流程及起源于埋藏点深度的放射性核素的相关传播时间。利用瑞典Laxemar候选场所作为案例研究,本文描述了模拟方法、数据集成以及由此而产生的水流模型,重点放在第四纪沉积物和基岩的上部150m。实例模拟确定了到地下水排泄区的流程以及表层系统中的流程。大多数模拟的地下水流程都终止于主要的表层水域和海岸线,即便用于跟踪流径的颗粒是以一种在相对较浅深度的均匀的空间分布输入的。计算出来的决定放射性核素衰减和持留可用的时间的地下水到沿岸海湾的行进时间要长于到该场所其他生物圈目标的。此外,基于GIS的模拟如何能用于限制安全评估需要说明的地方流程在此也加以解释。根据这些结果,本文讨论了使目前的模型与深基岩地下水流模型相结合的方法。

关键词：计算实例水流程埋藏地质瑞典地下水流模型放射性核素模拟方法

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面层自流平砂浆的耐磨性能研究

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新型建筑材料 2017年第6期44卷 40-43页

作者：戴浩刘艳王中兰李东旭北京宝辰联合科技股份有限公司北京102200 南京工业大学材料科学与工程学院江苏南京210009

研究了胶粉、酒石酸缓凝剂、胶凝材料、骨料级配和硬化剂对铝酸盐水泥基自流平砂浆耐磨性的影响,分析了砂浆耐磨性与流动度和强度的相关性。结果表明:胶粉可提高自流平砂浆的耐磨性,主要通过提高砂浆的稳定性和柔性来实现。酒石酸缓凝... 详细信息

研究了胶粉、酒石酸缓凝剂、胶凝材料、骨料级配和硬化剂对铝酸盐水泥基自流平砂浆耐磨性的影响,分析了砂浆耐磨性与流动度和强度的相关性。结果表明:胶粉可提高自流平砂浆的耐磨性,主要通过提高砂浆的稳定性和柔性来实现。酒石酸缓凝剂会增加砂浆的离析沉降程度,从而导致耐磨性降低。在以铝酸盐水泥为主的三元体系自流平砂浆中,适量增加石膏和硅酸盐水泥掺量均有利于提高耐磨性;降低胶凝材料用量,砂浆耐磨性降低。当40~70目砂和70~140目砂用量各为20%时,自流平砂浆的耐磨性最好。在自流平砂浆表面涂刷硬化剂,可提高表层的密实度和耐磨性,硬化剂涂刷量达到饱和用量,耐磨性提高不大。

关键词：面层自流平耐磨性流动度强度

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