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Search Results: 1 - 10 of 1044 matches for " Kouassi Ernest Ahoussi "
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Hydrogeochemical and Groundwater Quality Studies in the High Bandama Watershed at Tortiya (Northern of C?te d’Ivoire)  [PDF]
Tanina Drissa Soro, Gbombélé Soro, Kouassi Ernest Ahoussi, Yéi Marie Solange Oga, Nagnin Soro
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.72004
Abstract: Hydrochemical and groundwater quality of High Bandama watershed were investigated through thirty-five (35) samples composed of boreholes, hand pump wells and traditional wells. The analysis of physico-chemical parameters shows that groundwater is acidic with pH ranges from 3.2 to 6.9 and mean of 5.4. Electrical conductivity (EC) values were generally low and minimum and maximum were respectively 77 μS/cm and 553 μS/cm with an average of 250.3 μS/cm. Major cations (Ca2+, Mg2+, Na+ and K+) were also generally low. Ca2+ and Mg2+ are being the most dominants cations with concentration values ranges from 4 - 56 mg/l and 0 - 55 mg/l respectively with mean value of 18.11 and 15.31 mg/l. HCO3 is the most dominant anion with minimum and maximum values ranging from 5 to 215 mg/l. According to WHO guidelines, groundwater quality is good for drinking. Piper diagram classified the hydrogeochemical facies into Ca-HCO3 (48.57%), Ca-Mg-HCO3 (31.43%), Ca-Mg-Cl (17.14%) and Na-Cl (2.86%) water type with one sample for Na-Cl. Compositional relation with plot of Ca + Mg versus HCO3 + SO4 and Chloro Alkaline Indice (CAI) confirms that the majority of groundwater samples (66.67%) exchange their ions Ca and Mg with Na and K from aquifer materials. Gibbs diagram showed that the rock-water interaction or weathering is the dominant process responsible of water chemistry.
Influence of Anthropogenic Activities of Groundwater from Hand Dug Wells within the Precarious Settlements of Southern Abidjan, Côte d’Ivoire: Case of the Slums of Anoumabo (Marcory) and Adjouffou (Port-Bouët)  [PDF]
Isimemen Osemwegie, Yéi Mairie-Solange Oga, Kouassi Ernest Ahoussi, Yao Blaise Koffi, Amani Michel Kouassi, Jean Biémi
Journal of Water Resource and Protection (JWARP) , 2013, DOI: 10.4236/jwarp.2013.54042

This study aims to examine the quality and quantity of the groundwater resources from hand-dug wells, within two of these slums—Anoumabo (Marcory) and Adjouffou (Port-Bouet), both located in the southern part of the city. Twenty-eight representative groundwater samples were collected from different domestic wells within the study area. In addition, water samples were collected from the adjoining surface water bodies—the ébrié lagoon and the Atlantic Ocean. The water samples were also tested for microbial indicators of fecal contamination using the conventional membrane filtration method. The groundwater samples are alkaline to acidic with pH ranging between 4.4 and 8.1. They are slightly mineralized with electrical conductivity, EC values ranging between 388 μS/cm and 1494 μS/cm. The dominant hydrochemical facies are Na-Cl, Na-SO4, Ca-Cl and Ca-SO4. Although, majority of the water samples have anions and cations concentrations conforming to the World Health Organization, alerting levels of nitrate contamination was recorded in the area. About 67 percent of the tested samples have nitrate values greater than the recommended WHO limit for drinking water (NO3 > 50 mg/ι). Exceeding high nitrate concentrations in drinking water have been medically proven to be detrimental to infant health. Microbial analyses reveal bacterial contamination at varying degrees in all of the water wells. The presence of these microbial organisms in the samples is also indicative of the presence of some other disease causing pathogens, responsible for sicknesses like cholera, diarrhea, typhoid, etc. The water wells located within Anoumabo have relatively higher levels of groundwater contaminants in comparison to those located

Anthropogenic Activities and the Degradation of the Environmental Quality in Poor Neighborhoods of Abidjan, Côte d’Ivoire: Abia Koumassi Village  [PDF]
S. Loko, K. E. Ahoussi, Y. B. Koffi, A. M. Kouassi, J. Biémi
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.410126

This study deals with the degradation of the quality of the water environment in the village of Abia Koumassi, due to the pollution that has risen in Abidjan. The method used in this study is based on piezometric measurements, the physico-chemical and microbiological analysis. The results were processed using statistical and hydrochemical methods. The groundwater in the village is shallow, with a piezometric average level 0.55 m. The groundwater flows from the north of the village to the south. The Water resources have a neutral pH that varies between 6.8 and 7.43. Water temperature varies from 27.7°C to 29.8°C. The Water is highly mineralized, with electrical conductivity ranging from 585 μS/cm to 1310 μS/cm. The groundwater contains high levels of nitrate (116.81 mg·L-1) greater than the WHO standard for drinking water. High levels of Metallic Trace Elements (Ni, Zn, Co, Cr, Pb, Fe, Cu and Cd) are found in the water. Microbiological analysis shows that the water contains important levels of Escherichia coli, faecal streptococci, Clostridium perfringens and thermo tolerant coliform. These microorganisms create microbiological pollution in the water from the area. The Water resources of the village are facing a recent faecal pollution of human origin. This pollution comes from anthropogenic activities taking place in the area.

Analysis of Problems Encountered during the Rehabilitation and Management of Hemiplegic Patients of Vascular Origin in Abidjan (Ivory Coast)
Berthe Assi, Ange-Michel Datie, Ernest Beugré Kouassi, Benjamin Manou, Béatrice Mansé Nandjui, Emmanuel Ses, Thérèse Sonan-Douayoua
African Journal of Neurological Sciences , 2002,
Abstract: Problemes Lies a la Prise en Charge Reeducative des Hemiplegies Vasculaires a Abidjan (Cote d\'Ivoire) (Francais) Background Cerebrovascular accidents may cause impairments of m otor, sensory and neuro psychological aspects. Rehabilitation is of paramount importance to reduce the physical and neuropsychological disabilities due to stroke. The outcome depends on the severity of the impairment, the cultural and economic factor. Objective To evaluate the current rehabilitation practice in Abidjan with the aim of identifying problems encountered and hence suggest the appropriate improvements. Methods This is a retrospective study concerning 176 cases of cerebrovascular accident recorded over a six years period in a rehabilitation department in Abidjan (C te d\'Ivoire). Demographic characteristics, clinical data, initial functional assessment, rehabilitation care and functional status one year after stroke were analysed. Results Most of the patients started rehabilitation care after discharge from the hospital, and 36.8 % of them were admitted after the C.V.A. 3 months. Initial functional assessment failed to assess neuropsychological impairments except aphasia. The rehabilitation care consisted only of physical therapy, but neither occupational nor speech therapy were available. One year after stroke, 62.02 % of the patients were still dependent for their daily living activities or unable to return to their previous work. Conclusion Lack of initial functional assessment, absence of early rehabilitation care, physical therapy, and speech therapy are the main obstacles identified. Moreover, sociocultural behaviour and scarcity of appropriate policies favourable to disabled persons limit these patients socioprofessional reintegration.
Evaluation of the Microbiological and Nutritional Quality of Fermented-Dried Lesser African Threadfin (Galeoides decadactylus) Used as Food Supplement in Southern Benin  [PDF]
René G. Dègnon, Euloge S. Adjou, Edwige Dahouenon-Ahoussi, Mohamed M. Soumanou, Emile Fiogbé
Journal of Water Resource and Protection (JWARP) , 2014, DOI: 10.4236/jwarp.2014.61005

Lesser African threadfin (Galeoides decadactylus) is a nutritious marine fish, popular and widely used for drying-fermentation. The present work aims to evaluate the nutritional and microbiological quality of dried-fermented Lesser African Threadfin, currently used in food preparing in southern Benin. Four major sites of drying-fermentation fishes in southern Benin were investigated and dried-fermented Lesser African Threadfin was collected for quality control. Results indicated that the dried-fermented fishes were good sources of nutriments with a moisture content ranging from 44.62% ± 0.68% to 55.33% ± 0.23%. Proteins contents are ranged from 15.26% ± 0.32% to 22.95% ± 0.71%. All samples analyzed were rich in minerals such as magnesium, phosphorus, iron, with a

Tariffs and Total Factor Productivity: The Case of Ghanaian Manufacturing Firms  [PDF]
Charles Ackah, Ernest Ernest Aryeetey, Oliver Morrissey
Modern Economy (ME) , 2012, DOI: 10.4236/me.2012.33037
Abstract: This paper investigates the effects of trade liberalization on firm productivity in Ghana. We examine Ghanaian trade policy from 1993 to 2002, a period during which trade liberalization deepened with intermittent protection in a number of ways across industries, to investigate the effects of trade policy reforms and firm productivity. We find a strong negative impact of nominal tariffs on firm productivity, controlling for observed and unobserved firm characteristics and industry heterogeneity, a result that is robust to various alterations of the base model, including treating tariffs as endogenous and employing different estimation techniques. These results indicate that firms that are overprotected have a lower level of Total Factor Productivity than firms that are exposed to import competition. The estimated coefficients on both tariffs and its squared term confirm that higher tariffs are particularly distortionary.
Testing for Cross-Sectional Dependence in a RandomEffects Model  [PDF]
Afees Salisu, Sam Olofin, Eugene Kouassi
Open Journal of Statistics (OJS) , 2012, DOI: 10.4236/ojs.2012.21009
Abstract: This paper extends and generalizes the works of [1,2] to allow for cross-sectional dependence in the context of a two-way error components model and consequently develops LM test. The cross-sectional dependence follows the first order spatial autoregressive error (SAE) process and is imposed on the remainder disturbances. It is important to note that this paper does not consider alternative forms of spatial lag dependence other than SAE. It also does not allow for endogeneity of the regressors and requires the normality assumption to derive the LM test.
A Comparison of Classifiers in Performing Speaker Accent Recognition Using MFCCs  [PDF]
Zichen Ma, Ernest Fokoué
Open Journal of Statistics (OJS) , 2014, DOI: 10.4236/ojs.2014.44025

An algorithm involving Mel-Frequency Cepstral Coefficients (MFCCs) is provided to perform signal feature extraction for the task of speaker accent recognition. Then different classifiers are compared based on the MFCC feature. For each signal, the mean vector of MFCC matrix is used as an input vector for pattern recognition. A sample of 330 signals, containing 165 US voice and 165 non-US voice, is analyzed. By comparison, k-nearest neighbors yield the highest average test accuracy, after using a cross-validation of size 500, and least time being used in the computation.

Probit Normal Correlated Topic Model  [PDF]
Xingchen Yu, Ernest Fokoué
Open Journal of Statistics (OJS) , 2014, DOI: 10.4236/ojs.2014.411083
Abstract: The logistic normal distribution has recently been adapted via the transformation of multivariate Gaussian variables to model the topical distribution of documents in the presence of correlations among topics. In this paper, we propose a probit normal alternative approach to modelling correlated topical structures. Our use of the probit model in the context of topic discovery is novel, as many authors have so far concentrated solely of the logistic model partly due to the formidable inefficiency of the multinomial probit model even in the case of very small topical spaces. We herein circumvent the inefficiency of multinomial probit estimation by using an adaptation of the diagonal orthant multinomial probit in the topic models context, resulting in the ability of our topic modeling scheme to handle corpuses with a large number of latent topics. An additional and very important benefit of our method lies in the fact that unlike with the logistic normal model whose non-conjugacy leads to the need for sophisticated sampling schemes, our approach exploits the natural conjugacy inherent in the auxiliary formulation of the probit model to achieve greater simplicity. The application of our proposed scheme to a well-known Associated Press corpus not only helps discover a large number of meaningful topics but also reveals the capturing of compellingly intuitive correlations among certain topics. Besides, our proposed approach lends itself to even further scalability thanks to various existing high performance algorithms and architectures capable of handling millions of documents.
Random Subspace Learning Approach to High-Dimensional Outliers Detection  [PDF]
Bohan Liu, Ernest Fokoué
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.56063

We introduce and develop a novel approach to outlier detection based on adaptation of random subspace learning. Our proposed method handles both high-dimension low-sample size and traditional low-dimensional high-sample size datasets. Essentially, we avoid the computational bottleneck of techniques like Minimum Covariance Determinant (MCD) by computing the needed determinants and associated measures in much lower dimensional subspaces. Both theoretical and computational development of our approach reveal that it is computationally more efficient than the regularized methods in high-dimensional low-sample size, and often competes favorably with existing methods as far as the percentage of correct outlier detection are concerned.

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