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Radiation Dose from CT-Scan of Childhood’s Head: Results of the First Ivorian Survey in a Single Study Site

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Journal of Applied Mathematics and Physics 2024年第5期12卷 1725-1732页

作者： Koutoua Joseph Anouan Adjoua Sonia Dje Idrissa Garba Yoh Esther soro Nuclear Physics and Radiation Protection Team Training and Research Unit&#8212Sciences of the Structures of Matter and Technology University F&#233lix Houphouet-Boigny of Abidjan Abidjan C&#244te d&#8217Ivoire Department of Medical Pediatrics and Specialties University Hospital of Angr&#233 Abidjan C&#244te d&#8217Ivoire Department of Radiodiagnosis and Medical Imaging University Hospital of Angr&#233 Abidjan C&#244te d&#8217Ivoire

Objectives: This study aims to evaluate the level of X-ray doses used in childhood’s head as Local Diagnostic Reference Levels (LDRLs) in computed tomography (CT) at a university hospital in Côte d’Ivoire. The Diagnostic Reference Level (DRL) have been set up and used to prevent unusually high radiation doses used in radiology departments and is therefore an optimization tool for practices and procedures in medical X-ray imaging for the radiation protection of patients. Methods: A prospective study of volume CT dose index (CTDIvol) and dose length product (DLP) was performed on images of childhood’s head obtained from a CT-scanner of 64 bars equipped with the tube current modulation capability and manufactured by Hitachi Medical System. 122 CT-scan data from 55 childhood’s head were analyzed. The scan data were stratified in four age groups: Results: The 75th percentile of CTDIvol and DLP (set as LDRL) obtained with respect to the stratified age groups are: 22.5 mGy and 452.5 mGy∙cm, 27.7 mGy and 690.6 mGy∙cm, 28 mGy and 722.4 mGy∙cm, 33.6 mGy and 736.8 mGy∙cm respectively. These outcome values increase with respect to the age of pediatric patients and are comparable to DRLs values obtained internationally. Conclusions: Obtaining good image quality while using low dose in children’s head computed tomography for radiation protection require to setup more surveys in Côte d’Ivoire for regional and national DRL. We proposed through this survey LDRLs in terms of CTDIvol and DLP, comparable to international DRLs values. This survey will be strengthened by additional surveys in order to obtain national DRLs for the radiation protection of the child patient in Côte d’Ivoire.

关键词： Radiation Protection Computed Tomography Imaging Childhood Diagnostic Reference Levels

Investigating the Impact of Base Heating and External Electric Field on PV Cell Performance under Intense Illumination

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Open Journal of Applied Sciences 2024年第5期14卷 1305-1314页

作者： Boubacar soro Guy Serge Tchouadep Esso-Ehanam Tchedre Kpeli Ousmane Souliga Adama Ouedraogo Issa Zerbo Martial Zoungrana Laboratory of Thermal and Renewable Energies Universit&#233 Joseph KI-ZERBO Ouagadougou Burkina Faso Institut des Sciences et Technologie Ecole Normale Sup&#233rieure Ouagadougou Burkina Faso

The characterization of the performances of a PV cell is linked to intrinsic factors of this cell. It is therefore important for us to identify the favorable or unfavorable conditions that affect the performance of PV cells. It is from this perspective that it seems judicious to us to study the simultaneous influence of the heating of the base and an external electric field on the performance of a PV cell under intense illumination of 50 suns. Two phenomena contribute to the heating of the base of a PV cell which is heating due to the transfer by conduction of solar radiation energy received by the surface of the PV cell and the heat generated inside the PV cell by various phenomena linked to the movement of photogenerated charged carriers. In this study, we take into account the heating linked to the movement of the charged carriers in the base. After a mathematical modeling of the PV cell considered, some hypotheses are formulated and the expressions of the electrical parameters are established as a function of the electric field and base temperature. Subsequently, we use numerical simulation to highlight the behavior of theses parameters as a function of temperature and of the intensity of the electric field. The results show that for any given temperature, the orientation of the electric field as considered in our work improves the performance of the PV cell while high temperatures degrade these performances. Furthermore, the analysis of the curves shows that the harmful effect of temperature on the performance of a PV cell is more accentuated at large values of electric field.

关键词： Collisions Thermalization Braking Electric Strength Base Temperature

Comparative Study of the Physicochemical Quality of the Waters of the Méné River (Sassandra Watershed, Ivory Coast) in the Dry Season and in the Rainy Season

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Journal of Environmental Protection 2024年第6期15卷 738-746页

作者： Konan Lopez Kouamé Gansso Valentin Akilinon Olivier Simon Mananga Kombo Gneneyougo Emile soro Bi Tié Albert Goula Science and Technology Department Alassane Ouattara University Bouak Ivory Coast Environmental Sciences Laboratory Nangui Abrogoua University Abidjan Ivory Coast

The study carried out on the waters of the Méné River led to an overall assessment of its water quality during the dry season and the rainy season. The analysis focused on eight (8) water samples taken from the river during a period of dry season (January-February) and a period of rainy season (June and September). The various physicochemical parameters were measured according to Afnor standardized methods. The readings of temperature, turbidity, pH and conductivity made it possible to account for the disturbances occurring in water quality. A temporal variation correlated with the seasons (dry or rainy) is noted. Turbidity depends on the concentration of suspended solids (SS) in the water and drained particles and therefore on the seasons. Just like the temperature, the conductivity changes with the season. The waters of the Méné River are generally acidic. The results obtained show that there is a low level of pollution by chlorides, phosphates, nitrites and nitrates. A slight pollution of the waters of Méné in organic matter (chemical oxygen demand values are less than 25 mg∙L−1 during dry season and 32.33 ± 4.73 mg∙L−1 during rainy season) was observed. The concentrations of metallic trace elements such as iron, manganese and aluminum indicate significant pollution of these waters by these elements. Overall, the waters of the Méné River are of satisfactory quality because all the physicochemical parameters analyzed have values below standards during the dry season as well as during the rainy season with the exception of COD and a few metallic trace elements.

关键词： Méné Physicochemical Parameters River Season Water Quality

Hydrogeochemical Characterization of Groundwater from Fissured Aquifers in the Angovia Mine Operating Permit Area (Central-West Côte d’Ivoire)

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Journal of Water Resource and Protection 2024年第1期16卷 83-101页

作者： Kouadio Michel Yao Tanina Drissa soro Tanoh Jean Jacques Koua Akaie Jean Fabrice Tchakray Yao Emile Desmond Konan Brou Dibi Laboratory of Sciences and Technologies of Environment University Jean Lorougnon Guede Daloa C&ocircte d’Ivoire

The main objective of this study is to determine the hydrogeochemical specificities of the groundwater of the Angovia mine operating permit, located in the Yaouré mountains in the center-west of Côte d’Ivoire. To do so, descriptive and multivariate statistical analysis methods with the SOM (Self Organizing Maps) algorithm were applied to the physicochemical parameters of 17 boreholes using the calcite (ISC) and dolomite (ISD) saturation indices. The results obtained have shown that the groundwater in the Angovia mine operating permit area has an average temperature of 27.52°C (long rainy season) and 27.87°C (long dry season) and has an average pH of 7.09 ± 0.35 during the main rainy season and 7.32 ± 0.35 during the main dry season. They are mineralized with an average electrical conductivity of 505.98 ± 302.85 μS/cm during the long rainy season and with 450.33 ± 233.74 μS/cm as average during the long dry season. The main phenomena at the origin of groundwater mineralization are water residence time, oxidation-reduction and surface inflow. The study of the relative age of the water shows that the groundwater in the Angovia mine operating permit area is mainly undersaturated with respect to calcite and dolomite. They are therefore very old in the aquifer with a slow circulation speed during the long rainy season and the long dry season.

关键词： Hydrogeochemistry Mineralization Fissure Aquifers Operating Permits The Angovia Mine

Analysis and Comparison of Doping Level Effects on a Crystalline Silicon PV Cell under Both Moderate Light Concentration and Normal Illumination Modes

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Energy and Power Engineering 2022年第10期14卷 523-540页

作者： Mahamadi Savadogo Adama Ouedraogo Boubacar soro Zi daouda Koudougou Martial Zoungrana Issa Zerbo Laboratory of Thermal and Renewable Energies Department of Physics Unit of Training and Research in Pure and Applied Sciences University Joseph Ki-Zerbo Ouagadougou Burkina Faso Centre Universitaire Polytechnique de Kaya (CUP-Kaya) Kaya Burkina Faso Institut des Sciences et Technologies Ouagadougou Burkina Faso

The main purpose of this work is to study doping level effects on a silicon PV cell under both moderate light concentration and normal illumination. This study also aims to compare the doping level effects under the both illumination modes. The results show for both illumination modes that diffusion parameters decrease with increasing doping level. These results are in agreement with the studies of the current and the voltage which showed for the two illumination modes that doping level increase leads to a decrease in current density and an increase in voltage. It also emerges for the two illumination modes and for the doping range 1013 cm-3 - 1016 cm-3, a decrease of maximum power and conversion efficiency. The results also show that decrease of diffusion parameters is faster under moderate concentration in comparison with normal illumination. These results predict a greater variation rate of the current, the voltage, the maximum power and the conversion efficiency under moderate concentration compared to normal illumination. Contrary to diffusion parameters study, the results show higher variation rates of parameters under normal illumination. This is explained by the fact that under moderate concentration, carriers density is close to doping level: the cell is then in high injection condition. Consequently, under moderate concentration, carriers density is less sensitive to doping level variations. The study confirms that carriers density variation with the doping level is weak under the moderate concentration compared to normal illumination.

关键词： Moderate Light Concentration Doping Level High Injection Diffusion Parameters Conversion Efficiency

Impact of Beekeeping on the Wild Bee Diversity in Northern Ivory Coast(West Africa)

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Research in Ecology 2024年第1期6卷 6-13页

作者： Drissa Coulibaly Mouhamadou Koné Yalamoussa Tuo Kolo soro Kouakou Hervé Koua Department of Animal Biology Biological Sciences UnityUniversity Peleforo Gon CoulibalyBP 1328KorhogoIvory Coast Biosciences Unity Department of ZoologyAnimal Biology and EcologyUniversity Felix Houphouët-Boigny22 BP 1611 Abidjan 22Ivory Coast

In Ivory Coast,beekeeping takes an important place among the major economic *** contributes to improv-ing the population’s livelihoods thanks to its derived products which are honey,propolis,wax and royal ***-ever,the installation of honey bee hives could put pressure on wild bee species,which often live ***,these wild bees are excellent pollinators of cultivated and wild *** study aimed to assess the effect of honey bee hives on the diversity of wild *** methodology approach consisted of capturing bees in three different plots inside the forest fragment of the botanical garden located at the University Peleforo Gon *** first plot was chosen approximately from 10 m to an apiary containing ten *** two other plots were chosen to be 200 m and 400 m from the apiary,*** were captured once a month for three months using pan traps(UV—blue,yellow and white).A total of 17 bee species belonging to three families(Apidae,Megachilidae and Halictidae)were *** furthest plot from the apiary was the most diverse(H’=2.49)and that near the apiary was the least diverse(H’=0.11).Only,two wild bee species,Hypotrigona *** Thrinchostoma petersi,persisted inside the plot nearby the apiary where honey bees were most *** furthest plots from the apiary seem to have the highest diversity of wild *** findings are very relevant because they can be used for the policies of conservation of wild bees and the management of beekeeping activities.

关键词： Honey bee Apiary Hive Conservation Korhogo

Fungal Flora on Weeds in the Cashew (Anacardium occidentale L.) Orchard in Côte d’Ivoire

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American Journal of Plant Sciences 2023年第4期14卷 448-463页

作者： Traoré Aboulaye soro Sibirina Ayemou A. R. Emmanuella Traoré-Ouattara Karidia Kouabenan Abo Koné daouda Laboratory for the Improvement of Agricultural Production UFR Agroforestry Université Jean Lorougnon Guédé Daloa C&#244te d’Ivoire Laboratory of Phytopathology and Plant Biology Department of Training and Research in Agriculture and Animal Resources Institut National Polytechnique Félix Houphou&#235t-Boigny (INPHB) Yamoussoukro C&#244te d’Ivoire African Centre of Excellence on Climate Change Biodiversity and Sustainable Agriculture (CEA-CCBAD) Université Félix Houphou&#235t-Boigny (UFHB) Abidjan C&#244te d’Ivoire

Since 2015, Côte d’Ivoire has been the world’s largest cashew producer. However, cashew orchards in Côte d’Ivoire are infected by fungal diseases that weaken production. And the contribution of weeds to the spread of these diseases is not yet understood. This study was initiated with the aim of establishing the role of weeds in the proliferation of pathogenic fungi in orchards. It consisted of a survey of weeds showing disease symptoms in cashew orchards in Côte d’Ivoire from February 2021 to July 2022. The itinerant method was used for the weed inventory. Symptomatic leaves were collected and sent to the laboratory for diagnosis on PDA (Potatoes Dextrose Agar) medium. In total, 50 species in 46 genera and 23 families were recorded. Laboratory diagnosis of the samples showed that 80% of the weeds identified harboured pathogenic fungi. The highest infection rates were obtained on Danielia oliveri R. (99.33% to 100%), Vitellaria paradoxa G. (100%), Pterocarpus erinaceus P. (83.91% to 99.33%), Micuna pruriens L. (98.33% to 100%) and Isoberlinia doka C. et S. (56.33% to 100%). The diagnosis revealed the presence of Lasiodiplodia sp, Colletotrichum sp, Pestalotia sp, Alternaria sp and Curvularia sp on weeds in the cashew orchard in Côte d’Ivoire.

关键词： Weed Infection Rate Symptoms Cashew Côte d’Ivoire

Osteoarticular Lesions of the Shoulder Girdle by Hippopotamus Bite: Highly Septic Lesion

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Open Journal of Orthopedics 2024年第2期14卷 114-121页

作者： Jr Pierre Germain Ochou Achié Jean Régis Akobe Yao Aboh Ganyn Robert Arnaud Assere Kouamé Jean-Eric Kouassi Adelaïde Aya Natacha Kouassi Ibrahim Soumahoro Zolopégué Marcel soro Sédi Loues De Randolphe Akpro Gbalé Yannick Blé Kouamé Innocent M’bra Loukou Blaise Yao Bada Juste Léopold NiaoréSery Koffi Léopold Krah Michel Kodo Department of Orthopaedic and Traumatological Surgery Bouaké University Hospital Bouaké Ivory Coast Raoul Follereau Institute Manikro Centre Bouaké Ivory Coast

Hippopotamus bites are rare in medical consultations, despite several studies exposing their aggressive character. A case of a hippopotamus bite on the shoulder of a fisherman has been reported. In addition to the osteoarticular aspect representing a therapeutic problem, the infectious aspect was marked by sepsis, with a death in less than 48 hours. Based on this observation, a protocol for the initial management of large animal bites was submitted.

关键词： Bite Hippopotamus Septic Shock

Gastric per-oral endoscopic myotomy:Indications,technique,results and comparison with surgical approach

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World Journal of Gastrointestinal Surgery 2022年第1期14卷 12-23页

作者： Maria Chiara Verga Stefano Mazza Francesco Azzolini Fabrizio Cereatti Clara Benedetta Conti Andrea Drago Sara soro Biagio Elvo Roberto Grassia Gastroenterology and Digestive Endoscopy Unit ASST CremonaCremona 26100Italy Gastroenterology and Digestive Endoscopy Unit Ospedale San Raffaele IRCCSMilano 20132Italy Digestive and Interventional Endoscopy Unit ASST MonzaMonza 20800Italy

Gastroparesis is a chronic disease of the stomach that causes a delayed gastric emptying,without the presence of a *** 30 years the authors identified pylorospasm as one of the most important pathophysiological mechanisms determining *** with EndoFLIP,a device that assesses pyloric distensibility,increased the knowledge about *** on this data,several pyloric-targeted therapies were developed to treat refractory gastroparesis:Surgical pyloroplasty and endoscopic approach,such as pyloric injection of botulinum and pyloric ***,the success of most of these techniques is still not *** 2013,the first human gastric per-oral endoscopic myotomy(GPOEM)was *** was inspired by the POEM technique,with a similar dissection method,that allows *** results of GPOEM are similar to surgical approach in term of clinical success,adverse events and post-surgical *** the last 8 years GPOEM has gained the attention of the scientific community,as a minimally invasive technique with high rate of clinical success,quickly prevailing as a promising therapy for *** surprisingly,in referral centers,its technical success rate is 100%.One of the main goals of recent studies is to identify those patients that will respond better to the therapies targeted on pylorus and to choose the better approach for each patient.

关键词： Gastric per-oral endoscopic myotomy Pyloroplasty Gastroparesis EndoFLIP Pyloromyotomy Gastroparesis cardinal symptom index