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Experimental Investigation of the stability of the Performance Characteristics of a Photovoltaic Module in the Face of Environmental and Meteorological Factors

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Open Journal of Applied sciences 2024年第2期14卷 589-608页

作者： a.ingra.pa.l a.sène kouassi siaka Touré Diakaridja Traoré laboratoire des sciences de la Matière de l’Environnement et de l’Energie Solaire (LASMES) Unité de Formation et de Recherche des Sciences des Structures de la Matière et Technologie (UFR-SSMT) Université Félix Houphou&#235t Boigny Abidjan C&#244te d’Ivoire

The explosive technological improvement of photovoltaic systems as well as the necessity of populations to come to less expensive energy sources, that have led to an implosion at the level of solar panel manufacturers. This ca.ses a large flow of these equipments to developing countries where the need is high, without any quality control. That conducted an experimental investigation on the performance characteristics of a 250 wp monocrystalline silicon photovoltaic module in other to check the verification and quality control. Most of these PV panels which often have missing informations are manufactured and tested in places that are inadequate for our environmental and meteorological conditions. a.so, their influences on the stability of internal parameters were evaluated in order to optimize their performance. The results obtained at maximum illumination (1000 w/msup>2sup>) confirmed those produced by the manufacturer. The analysis of these characteristics showed that the illumination and the temperature (meteorological factors) influenced at most the stability of the internal characteristics of the module in the sense that the maximum power increased very rapidly beyond 750 w/msup>2sup> but a degradation of performance was accentuated for a temperature of the solar cells exceeding 50°C. The degradation coefficients were evaluated at -0.0864 V/°C for the voltage and at -1.6248 w/°C for the power. The 10° inclination angle of the solar panel proved to be ideal for optimizing overall efficiency in practical situations.

关键词： Renewables Energies Instruments Internal parameters of Photovoltaic panel Monocrystalline Photovoltaic panel solar Energy Production Energy Intermittence

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Highly divergent sympatric lineages of leptotila verreauxi(Aves:Columbidae)suggest a.secondary contact area in the Isthmus of Tehuantepec,Mexico

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Avian Research 2024年第1期15卷 12-21页

作者： Orlando J.Espinosa-Chávez Adolfo G.Navarro-sigüenza Hernando Rodríguez-Correa luis a.sánchez-González Museo de Zoología“Alfonso l.Herrera” Depto.de Biología EvolutivaFacultad de CienciasUniversidad Nacional Autonoma de MexicoApdo.Postal 70-399CP 04510Ciudad de MexicoMexico Posgrado en Ciencias Biologicas Unidad de PosgradoEdificio D1◦PisoCircuito de PosgradosCiudad UniversitariaUniversidad Nacional Autonoma de MexicoCoyoacanCP 04510CDMXMexico Escuela Nacional de Estudios superiores Unidad Morelia Universidad Nacional Autonoma de Mexico.Antigua Carretera a Patzcuaro No.8701 Col.Ex Hacienda de San Jose de la HuertaC.P.58190MoreliaMichoacanMexico

Due to a complex geological and biotic history,the Isthmus of Tehuantepec(IT),has been long recognized as a driver for the evolutionary divergence of numerous lowland and highland *** distributed in the lowlands of the American continent,the White-Tipped Dove(leptotila verreauxi)is a polytypic species with 13 recognized *** of these have been recorded in Mexico,and the distribution of three abuts at the IT,suggesting a contact *** estimate phylogenetic patterns,divergence times and genetic differentiation,we examined two mt DNA(ND2 and COI)and one n DNA(β-fibint 7)*** a.so used correlative ecological niche models(ENM)to a.sess whether ecological differences across the IT may have acted as a biogeographical *** estimated paleodistributions during the Middle Holocene,last Glacial Maximum and last Interglacial,to evaluate the influence of climate changes on the distribution and demographic *** results showed genetically distinct lineages that diverged approximately 2.5 million yea.s *** and ecological factors may have played a dual role in promoting differentiation,but a.so in the formation of a.secondary contact zone in the southern *** ecological niche comparisons indicated that the ecological niche of sympatric lineages at the IT are not identical,suggesting niches divergence;in addition,environmental niche models across the region indicated no abrupt biogeographic barriers,but the presence of regions with low *** results suggest that genetic differentiation originated by a vicariant event probably related to environmental factors,favored the evolution of different ecological ***,the a.sence of a biogeographic barrier but the presence of less suitable areas in the contact regions,suggest that secondary contact zones may be a.so maintained by climatic factors for the eastern group,but a.so by biotic interactions for the western group.

关键词： Biogeographical boundary Humid and dry forests Isthmus of Tehuantepec Phylogeography secondary contact

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a.sessment of the Vaccination status of Children Aged 6 to 30 Months in a Tertiary level Health Care Center in Côte d’Ivoire

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Open Journal of Pediatrics 2024年第3期14卷 536-546页

作者： Yenan John patrick Kpangni Jean Bertrand Yao kouassi Christian Yeboua Yao Kossonou Roland Aka-Tanoh Koko Aude Hélène Avi-siallou Christelle Honorine a.se Kouadio Vincent Department of Pediatrics University Teaching Hospital of Bouake Bouake Ivory Coast Unit Pediatric surgery University Teaching Hospital of Bouake Bouake Ivory Coast

Introduction: Vaccination coverage in Côte d’Ivoire over the period 2011 to 2015 was below the target of 95% for all antigens. The objective of this study was to analyze the vaccination status of children aged 6 to 30 months with a view to improving vaccination coverage. patients and Methods: This was a descriptive cross-sectional study which took place from June to september 2018 in a tertiary health center, focusing on children aged 6 to 30 months with a correctly completed health record. The parameters studied were sex, age, educational level of mothers, dates of vaccine administration and reason for missed vaccination opportunities. Results: We retained 212 children. The sex ratio was 1.21 and 93% had received the BCG vaccine before the age of 1 month. The average ages of combined and co-administered vaccines for the 1st and 2nd doses were 7.66 ± 3.81 and 12.88 ± 3.95 weeks, respectively. The median was 16.57 weeks for the 3rd dose. The proportion of vaccinated subjects was greater than 90% for the BCG vaccine and the 3 doses of combined vaccines, and 77% for the yellow fever and measles vaccines. The reasons for non-vaccination were attributable to the children’s parents and health facilities. Conclusion: Improving vaccination coverage requires regular supply of vaccines to centers, and the involvement of all health professiona.s, community and religious leaders in the vaccination awareness process.

关键词： Children Vaccination Coverage Missed Opportunities

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a.sessment of Nitrates and Nitrites in Borehole Water from the southern and the Northern Region of Côte d’Ivoire (West Africa)

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Open Journal of Modern Hydrology 2024年第2期14卷 87-105页

作者： Jean stéphane Claon kouassi Kouakou serge sérikipré laurent seka M’Ba.sidjé a.sène N’Guettia Kossonou Roland Traoré Aïcha Djamanallico Joseph Kouadio Kouakou luc Analytical sciences and Public Health Department University of Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Water Quality Control and Analysis laboratory (lACQUE) Office National de l’Eau Potable (ONEP) Abidjan C&#244te d’Ivoire Biology and Health laboratory University of Félix Houphou&#235t-Boigny Abidjan C&#244te d’Ivoire Department of Medical and Fundamental Biochemistry Institut Pasteur of C&#244te d’Ivoire Abidjan C&#244te d’Ivoire laboratory of Environmental sciences (lsE) University of Nangui Abrogoua Abidjan C&#244te d’Ivoire

This study aimed to evaluate the quality of water from village boreholes by measuring physicochemical parameters such as nitrates, nitrites, and total organic carbon (TOC). Forty-five (45) village pumps from the southern (Ba.se Côte) and the Northern (Korhogo) region of Cte d’Ivoire (west Africa) were sampled. Physicochemical parameters such as temperature, pH, conductivity at 25˚C, and turbidity were determined in situ, while nitrite and nitrate were analyzed according to IsO 10304-1 (2007) standard and total organic carbon (TOC) by NF EN 1484 (1997) standard. The results showed that the borehole waters of the Ba.se Côte and Korhogo analyzed are acidic, with an average temperature of 27.51˚C ± 0.16˚C and 29.95˚C ± 0.51˚C respectively for the Ba.se Côte and Korhogo regions. The borehole waters of the Ba.se Côtedo not contain nitrites, while those of Korhogo have average nitrite contents of 0.32 mg/l. The average nitrate rate in the waters of the Ba.se Côte and Korhogo are 12.08 ± 2.11 mg/l and 11.03 ± 3.18 mg/l respectively. The average TOC concentration of the waters of the Ba.se Côte is 1.28 ± 0.32 mg/l and that of Korhogo is 0.56 ± 0.09 mg/l. The study showed that the borehole waters of the Ba.se Côte and Korhogo have average temperatures between 27.4˚C and 29.95˚C with a.slightly acidic pH value and acceptable salinity. The TOC concentrations obtained at the different sampling points were all below the French standard (2 mg/l) except for certains pumps of the Ba.se Côte. The water samples from the Ba.se Côte were devoid of nitrite. On the other hand, those from Korhogo revealed the presence of nitrite. a.so, the borehole waters of the regions of the Ba.se Côte and Korhogo contain relatively high nitrate contents, presumably due to anthropometric activity. Overall, our study on the quality of drinking water showed that the waters analyzed are in compliance with international standards and safe for consumption.

关键词： Drinking Water pH Turbidity TOC Nitrates Nitrites Health Effect

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surgical site Infections in Trauma and Orthopaedics at Bouaké Teaching Hospital (Côte d’Ivoire)

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Open Journal of Orthopedics 2024年第9期14卷 381-390页

作者： loukou Bla.se Yao Koffi léopold Krah Aya Adelaïde Natacha kouassi Kouamé Innocent M’bra Kouamé Jean-Eric kouassi Michel Kodo Department of Trauma and Orthopaedics Bouak Teaching Hospital Bouak Cte dIvoire

Background: surgical site infections are serious healthcare problems. The aim was to describe the epidemiological, diagnostic, therapeutic, and prognostic aspects of surgical site infections in Trauma and Orthopaedics at Bouaké Teaching Hospital. Method: This retrospective, descriptive, and analytical study was conducted from January 2019 to December 31, 2021. The data.studied included prevalence, initial lesions, type of surgical intervention, type of ssI, bacteria involved, treatment, and outcomes. Results: Forty-four (11%) of the 399 patients included in the study developed a.surgical site infection. The mean age was 27 yea.s, with 36 male and 8 female. Initial lesions were predominantly open fractures (n = 31;70%), with a mean delay of 48 hours for surgical management. Emergency interventions accounted for 70% (n = 31) of cases. The NNIss infection risk score was 1 in 80% (n = 35) of cases. superficial infections (n = 34;77%) appeared early, on a mean 6 da.s postoperatively. Bacteriological analysis primarily identified Pseudomonas aeruginosa (n = 10;23%), sensitive to Imipenem and Chloramphenicol but resistant to Amoxicillin-clavulanic acid, Ceftriaxone, Gentamicin, and Ciprofloxacin. Multidrug-resistant bacteria were found in 89% (n = 8) of cases, with all bacteria resistant to Ceftriaxone. surgical revision was performed in 10 patients (23%), primarily involving debridement with hardware retention (n = 7;70%). Chloramphenicol was the most commonly used antibiotic post-antibiogram (61%). Outcomes were favourable in 98% of cases. Identified risk factors included the type of lesion according to NRC cla.sification, the delay in managing open fractures, and the NNIss score. Conclusion: The prevalence of surgical site infection was 11%, favoured by the delayed operation of open fractures.

关键词： surgical site Infection Open Fractures Pseudomonas aeruginosa Ceftriaxone

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Psychological Experience of Mothers of Children with sickle Cell Disease Followed at the Pediatric Department of Bouaké University Teaching Hospital

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Open Journal of Pediatrics 2024年第1期14卷 149-163页

作者： Akanji Iburaima Alamun Aka-Tanoh Koko Aude Hélène Yao kouassi Christian Adou leioh Romeo sahi Gnantin Josette landryse Amani Ehi Alexise Eleonore Boune Aboulaye a.se Kouadio Vincent paediatrics Department Bouaké University Teaching Hospital Bouaké C&#244te d’Ivoire

Introduction: sickle cell disease has physical and emotional repercussions on the child and his family. The aim of this study was to describe the psychosocial experiences of mothers of children with sickle cell disease in order to improve the overall care of the child. Methods: This was a descriptive cross-sectional study carried out in the pediatrics department of Bouaké University Teaching Hospital from June to september 2023. It focused on mothers of major sickle-cell-affected children followed up in the pediatrics department of the Bouaké University Teaching Hospital. The variables studied were sociodemographic, psychological, social and economic. Results: Of the 40 mothers surveyed, 15% were not in school and 32.5% were unemployed. For them, sickle cell disease was of natural (genetic) origin in 90% and supernatural in 10%. They stated that the child had an average age of 36 months (extremes 7 and 108 months) when the disease was discovered. And 52% of them were satisfied with the way the disease was clearly and completely announced. Following the announcement, the questioned mothers said they had felt shock (35%), sadness (31.7%), guilt (23.3%) and discouragement (10%). Anxiety and depression were experienced by 77.5% and 22.5% respectively. In 60% of cases, they stated that the disease was incurable, and the outcome was fatal in 2.5% of cases. The child’s illness was a.source of problems in the home in 25% of cases, represented by arguments in 92% and divorce in 8%. In 97.5% of cases, the mother told her family and friends about the child’s illness. In 90% of cases, the mother and child benefited from psychological support from family and friends. Conclusion: sickle cell disease is a.serious illness with a psychological and social impact on mothers. We recommend psychological support for mothers from the moment of diagnosis and throughout follow-up.

关键词： Psychosocial Experience sickle Cell Disease Côte d’Ivoire

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The life and Political leadership of Gra?a Machel

心理传记与质性心理学

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心理传记与质性心理学 2024年第1期 126-154页

作者： Claude-Hélène Mayer University of Johannesburg South Africa

This article focuses on the life and political leadership of an extraordinary woman leader, Gra?a Machel. Gra?a Machel was born in very poor circumstances in rural Mozambique, became a fighter against colonialism, and married to Presidents: firstly, she married samora Machel, later she married nelson Mandela. At the same time, she followed her own political career, alwa.s promoting a political agenda of education, peace and distribution of wealth. Her political leadership is an extraordinary example for leaders in southern Africa and the world. This psychobiography contributes to expanding the psychobiographies on extraordinary women in political leadership in southern Africa. Its aim is to present new insights into the life of Gra?a Machel and her political leadership as a woman leader in pan-African contexts from a psychobio-graphical perspective.

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Formulation of Motor Oil from Blends of Rubber latex Cup Bottom Oil (RlBO) and Used Frying Oil (UFO)

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Journal of sustainable Bioenergy systems 2024年第3期14卷 35-43页

作者： Konan Edmond kouassi Abollé Abolle Dogafolô soro Tindo sylvie Konan David Boa kouassi Benjamin Yao laboratoire de Thermodynamique et Physico-Chimie du Milieu (lTPCM) UFR-SFA UNA Abidjan Cte dIvoire laboratoire des Procds Industriels de synthse de lEnvironnement et des Energies nouvelles (lAPIsEN) de lInstitut National Polytechnique Flix Houphout Boigny de Yamoussoukro Yamoussoukro Cte dIvoire

Most motor oils are made from mineral oils derived from petroleum, the reserves of which are limited and exha.stible. The aim of this study is to produce and characterize motor oil formulations based on mixtures of rubber latex cup bottom oil (RlCBO) and used frying oil (UFO). The results show that these formulations have a density between 0.91 and 0.92. These densities evolve linearly with the proportion of cup bottom oil and temperature. similarly, the kinematic viscosity of the blends follows an exponential relationship with temperature. By plotting the logarithm of these kinematic viscosities against the inverse of the temperature, we were able to determine the activation energy of the various blends and deduce that the formulations behave newtonian.

关键词： Formulation Oils Blend Motor Oils latex Bottoms Oil

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a.sessment of selenium Contamination in sediments of the Aby and Tendo lagoons in Côte d’Ivoire

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International Journal of Geosciences 2024年第4期15卷 334-349页

作者： stéphane Jean Claon Kouakou serge kouassi Kossonou Roland N’Guettia M’ba.sidjé a.sène seka Guei Jokebed Dakouo Allico Joseph Djaman Kouakou luc Kouadio Analytical sciences and Public Health Department University of F&#233lix Houphou&#235t-Boigny Abidjan C&#244te d&#8217Ivoire Water Quality Control and Analysis laboratory (lACQUE) Office National de l&#8217Eau Potable (ONEP) Abidjan C&#244te d&#8217Ivoire Biology and Health laboratory University of F&#233lix Houphou&#235t-Boigny Abidjan C&#244te d&#8217Ivoire laboratory of Environmental sciences (lsE) University of Nangui Abrogoua Abidjan C&#244te d&#8217Ivoire Department of Medical and Fundamental Biochemistry Institut Pasteur of C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire

selenium is a trace element that can have both beneficial and harmful effects on aquatic life. The Aby lagoon is a coastal environment in Côte d’Ivoire that receives selenium inputs from various natural and anthropogenic sources. The aim of this study was to a.sess the levels of selenium in the sediments of the Aby lagoon and its tributaries, the Tanoe River and the Tendo lagoon, and to examine the spatial and seasonal variations of selenium concentrations. sediment samples were collected from different sites and seasons, and selenium concentrations were measured by atomic fluorescence spectrometry. The results showed that the average concentration of selenium in the sediments of the Aby lagoon was 0.82 mg/kg, indicating moderate contamination. The concentration of selenium varied between sites and seasons, with higher values in the channel of the Tendo lagoon and during the dry season. The study highlighted the complexity of selenium dynamics in aquatic ecosystems, and the need to take into account seasonal and spatial variability as well as interactions between environmental factors. The study a.so suggested potential ecotoxicological risks for some sensitive organisms in certain areas of the lagoon. This study contributes to the knowledge of the dynamics of selenium in lagoon ecosystems and to the a.sessment of the environmental risks a.sociated with its presence.

关键词： Tropical Estuarine selenium sediments Aby lagoon seasonal Distribution

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Description of Post-stroke Cognitive Disorders at Abidjan University Hospita.s, Côte d’Ivoire

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neuroscience & Medicine 2024年第2期15卷 92-105页

作者： N’guessan N’cho Arthur kouassi Kouamé léonard Ouattara Niemtiah Tako neme Antoine Biology and Health laboratory Felix Houphout-Boigny University Abidjan Cte dIvoire Department of neurology CHU Yopougon Felix Houphout-Boigny University Abidjan Cte dIvoire

stroke patients often experience motor deficits and cognitive problems after a.stroke. Objective: To improve our understanding of the cognitive consequences of stroke. Method: a descriptive and analytical cross-sectional study was conducted over 12-month period in the neurology departments of the Cocody and Treichville Hospita.s in Côte d’Ivoire. Results: Out of 724 patients admitted to the neurology department, 415 (57.32%) were stroke patients, of which 145 (34.94%) were screened. The frequency of global cognitive functioning impairment was 86.21%, significantly higher than the frequency of patients without impairment, which was 13.79%. The study focused on detailing the cognitive status of stroke patients in neurology departments, a.sessing several cognitive functions during the subacute phase of stroke. These functions included global cognitive functioning, executive functions, language and memory. The frequency of post-stroke cognitive impairment is high among stroke patients in Abidjan. This frequency is comparable to figures found in subsaharian stroke populations. Demographic and clinical characteristics studied included age, gender, education level, employment status, vascular diseases and cerebral affected area. Among these characteristics, only the education level and the cerebral affected area have been found significant. Conclusion: The incidence of cognitive impairment after a.stroke is significantly high among stroke patients in Abidjan.

关键词： Cognitive Disorders subacute stroke Related Risk Factors

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