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Search Results: 1 - 10 of 220541 matches for " Célestin Elock Son "
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Supply Chain Risk Management: A Review of Thirteen Years of Research  [PDF]
Célestin Elock Son
American Journal of Industrial and Business Management (AJIBM) , 2018, DOI: 10.4236/ajibm.2018.812154
Abstract: This paper performs a systematic literature review on supply chain risk management (SCRM). This review analyzes 133 articles published between 2005 and the first quarter of 2018. Its main purpose is to identify the developed strategies used to mitigate risks and improve supply chain performance. It appears that there is heterogeneity in the developed strategies and that quantitative methods simulation/modeling are the most used by researchers to mitigate supply chain risks (SCR). Although emphasis is made on the links between SCRM and performance or resilience, risk prevention strategies remain the least represented in the papers analyzed. We also find that there is no superior approach in the set of various risks management strategies and thus it is difficult to linearly establish, the successive evolutions of the models that would replace others.
Normativity and the Problem of Look in the Emergence of Citizen Journalism  [PDF]
Célestin Messanga Obama
Advances in Journalism and Communication (AJC) , 2016, DOI: 10.4236/ajc.2016.41001
Abstract: Citizen journalism (in French Journalisme citoyen) is a form of journalism exercised by the public (the readers, the audiences and tele-viewers), specifically on the internet. Theoretically, it could be seen as a kind of revolution within the public getting into a trade long held jealously mainly by conventional journalists. What accounts for the fact that a trade, whose mastery requires training on its techniques and specific norms, gets invaded by untutored minds? That appears to be the central issue we are seeking to resolve in this article. We go from the hypothesis that citizen journalism has developed as a result of the publics’ lack of satisfaction, both at quantitative and qualitative levels with the delivery of conventional journalism. In effect, conventional journalism raises myriad issues that require the consumers to proceed to a kind of selection, which itself could be a problem. However, by their nature, issues that constitute news are complex, and this leads to some manipulation in their treatment. These two axes appear to reveal the main sources of discord between conventional journalism and revolted-publics.
Future Extremes Temperature: Trends and Changes Assessment over the Mono River Basin, Togo (West Africa)  [PDF]
Lawin Agnidé Emmanuel, Lamboni Batablinlè, Manirakiza Célestin, Kamou Hodabalo
Journal of Water Resource and Protection (JWARP) , 2019, DOI: 10.4236/jwarp.2019.111006
Abstract: This study assessed the extreme temperatures trends and changes over Mono River Basin under the highest greenhouse gas emission scenario RCP8.5. Simulations of five (5) regional climate models (RCMs) provided by Africa-CORDEX program were selected from the eighth (8) considered. Future trends in temperature percentiles, including extremes, are used to assess changes in the distribution of daily temperature over Mono Basin in Togo. Changes of temperature and Extreme low (high) temperatures from the baseline period 1961-2010 were computed for future (2051-2100). This analysis reveals that in the north of the basin, for the positive trends, the maximum is 0.82°C·year-1 given by model MPI-ESM2 at Tchamba while the strongest negative change is 0.26°C·year-1 given by model MIROC at Sotouboua. In the south of the basin, the strongest negative trend is of 0.03°C·year-1 given by model (A) CNRM-CMA5. The maximum ones of the trends for models-mean are all positive except at Anié. Higher percentiles of minimum and maximum temperature will increase at a greater rate than the lower percentiles during dry and rainy seasons (with differences more pronounced for maximum values) over the north. Concerning future changes, almost all the RCMs predicted an increase of maximum and minimum temperatures over most parts of the Mono Basin, particularly in the north. Finally, results predicted an increase of TX90P (TX10P) and TN90P (TN10P) from 10% to 45% (13% to 40%) and 0% to 35% (12% Mean value), respectively over Mono Basin.
Quelles lois essentielles pour la République Démocratique du Congo ?
Célestin Kabuya-Lumuna
Fédéralisme-Régionalisme , 2005,
On multivariate associated kernels for smoothing general density functions
Célestin C. Kokonendji,Sobom M. Somé
Statistics , 2015,
Abstract: Multivariate associated kernel estimators, which depend on both target point and bandwidth matrix, are appropriate for partially or totally bounded distributions and generalize the classical ones as Gaussian. Previous studies on multivariate associated kernels have been restricted to product of univariate associated kernels, also considered having diagonal bandwidth matrices. However, it is shown in classical cases that for certain forms of target density such as multimodal, the use of full bandwidth matrices offers the potential for significantly improved density estimation. In this paper, general associated kernel estimators with correlation structure are introduced. Properties of these estimators are presented; in particular, the boundary bias is investigated. Then, the generalized bivariate beta kernels are handled with more details. The associated kernel with a correlation structure is built with a variant of the mode-dispersion method and two families of bandwidth matrices are discussed under the criterion of cross-validation. Several simulation studies are done. In the particular situation of bivariate beta kernels, it is therefore pointed out the very good performance of associated kernel estimators with correlation structure compared to the diagonal case. Finally, an illustration on real dataset of paired rates in a framework of political elections is presented.
Discrete Dispersion Models and Their Tweedie Asymptotics
Bent J?rgensen,Célestin C. Kokonendji
Statistics , 2014,
Abstract: We introduce a class of two-parameter discrete dispersion models, obtained by combining convolution with a factorial tilting operation, similar to exponential dispersion models which combine convolution and exponential tilting. The equidispersed Poisson model has a special place in this approach, whereas several overdispersed discrete distributions, such as the Neyman Type A, P\'olya-Aeppli, negative binomial and Poisson-inverse Gaussian, turn out to be Poisson-Tweedie factorial dispersion models with power dispersion functions, analogous to ordinary Tweedie exponential dispersion models with power variance functions. Using the factorial cumulant generating function as tool, we introduce a dilation operation as a discrete analogue of scaling, generalizing binomial thinning. The Poisson-Tweedie factorial dispersion models are closed under dilation, which in turn leads to a Poisson-Tweedie asymptotic framework where Poisson-Tweedie models appear as dilation limits. This unifies many discrete convergence results and leads to Poisson and Hermite convergence results, similar to the law of large numbers and the central limit theorem, respectively. The dilation operator also leads to a duality transformation which in some cases transforms overdispersion into underdispersion and vice-versa. Many of the results have multivariate analogues, and in particular we consider a class of multivariate Poisson-Tweedie models, a multivariate notion of over- and underdispersion, and a multivariate zero-inflation index.
Effects of associated kernels in nonparametric multiple regressions
Sobom M. Somé,Célestin C. Kokonendji
Statistics , 2015,
Abstract: Associated kernels have been introduced to improve the classical continuous kernels for smoothing any functional on several kinds of supports such as bounded continuous and discrete sets. This work deals with the effects of combined associated kernels on nonparametric multiple regression functions. Using the Nadaraya-Watson estimator with optimal bandwidth matrices selected by cross-validation procedure, different behaviours of multiple regression estimations are pointed out according the type of multivariate associated kernels with correlation or not. Through simulation studies, there are no effect of correlation structures for the continuous regression functions and also for the associated continuous kernels; however, there exist really effects of the choice of multivariate associated kernels following the support of the multiple regression functions bounded continuous or discrete. Applications are made on two real datasets.
Contribution of Dermatopathology in the Diagnosis of Cutaneous Diseases in C?te d’Ivoire  [PDF]
Kouadio Célestin Ahogo, Kouame Kanga, Ange Sylvain Allou, Sylvanus Koui, Bitti Adé Odo
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2017, DOI: 10.4236/jcdsa.2017.74028
Abstract: Introduction: Dermatopathology is a fundamental complementary examination for the diagnosis of certain skin conditions when the clinic is hesitant. We therefore initiated this work in order to determine the contribution of dermatopathology in the diagnostic management of certain dermatoses at the Treichville University Hospital Centre of Abidjan. Material and methods: This is a cross-sectional descriptive study with data collection from medical records in the dermatology-venereology and pathological anatomy departments of the Treichville University Hospital Centre. Results: We included and analyzed 184 patients with a sex ratio of 1.2. 46.2% of lesions were generalized with 2% mucosal localization. Erythematosquamous lesions (24.45%) and papules (22.82%) were the most biopsied lesions. The single biopsy sample accounted for 71.2% of the cases and the lesion size ranged from 0.5 cm to 10 cm. Biopsy parts of the lesion alone accounted for 65.2% versus 34.8% for those straddling healthy skin and lesion. Histological diagnosis was established in 91.3%. Kaposi disease accounted for 14.9% of cases followed by psoriasis 11.3%. In the case of three diagnostic hypotheses, the concordance was 84.8%. It was 76.6% for two hypotheses mentioned and 52.3% for a single hypothesis. Conclusion: This work shows that in more than half of the cases, the clinical hypotheses and the histological diagnosis match. It suggests however to continue the training of dermatologists to improve the skin biopsies and invites to initiate clinicopathological confrontations to better refine the
Dermatomyositis: Epidemio-Clinical Profile, Therapeutic and Evolutive Aspects in C?te d’Ivoire  [PDF]
Kouadio Célestin Ahogo, Kanga Kouame, Kouassi Yao Isidore, Kouassi Kouamé Alexandre, Allou Ange Sylvain
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2018, DOI: 10.4236/jcdsa.2018.84025
Abstract: Introduction: Dermatomyositis is a rare pathology with severe prognosis. Its prevalence varies from one part of the earth to another and its clinical aspects are multiple. In Western countries, they have been the subject of several studies. However few studies have been devoted to this disease in sub-Saharan Africa. We initiated this work to contribute to a better knowledge of dermatomyositis in our work context. Material and Methods: This is a retrospective, descriptive and analytical study carried out in the Dermatology Department of the University Hospital Center of Treichville from January 2006 to December 2015. All Patients with dermatomyositis have been taken into account in the study. Results: The hospital prevalence of dermatomyositis in our work was 1.38%. The age of our patients ranged from 11 to 79 years with an average of 41 years. The sex ratio was 0.48. The delay before the first consultation ranged from 1 week to 1 year 9 months with an average of 5 months. Cutaneous manifestations were the first signs observed including post-in-flammatory hyperpigmentation and erythro-eodema. Muscular manifestations were dominated by muscular pain (81.08%). muscular enzymes were consistently elevated in biological examinations. The duration of hospitalization was 3 weeks in average. Oral corticotherapy (94.59%) was the most used therapy. A clinical improvement was observed on average 4 months after treatment. The death rate was 16.22%. Conclusion: Dermatomyositis is infrequent in C
Epidemio-Clinical Profile of Skin Conditions in Pediatric Dermatology Consultation of the University Hospital of Treichville  [PDF]
Kouadio Célestin Ahogo, Kouamé Kanga, Kouassi Kouamé Alexandre, Allou Ange Sylvain, Enoh Jacob, Balliet Gbiagohi Sandrine
Journal of Cosmetics, Dermatological Sciences and Applications (JCDSA) , 2018, DOI: 10.4236/jcdsa.2018.84029
Abstract: Introduction: Dermatoses are common in the pediatric population. They have certain particularities such as the prevalence of the diaper dermatitis and genetic disorders. Paediatric dermatological problems are common, with some conditions requiring specialist consultation. Often appropriate diagnosis and therapy are sometime delayed in certain countries. Few studies have focused on pediatric aspects of skin diseases in Côte dIvoire. We initiated this work to contribute to a better knowledge of pediatric skin conditions in our work context. Material and Methods: This is a cross-sectional prospective, descriptive and analytical study carried out in the Dermatology Department of the University Hospital of Treichville from January 2015 to December 2017. Data from the study were collected on a survey card that included socio-demographic characteristics and clinical aspects. All children with cutaneous and mucosal disease seen in pediatric dermatology consultation have been taken into account in the study. Results: 11,487 patients were seen in dermatology consultation during the period of our study with only 302 children, a prevalence of 2.6%. The sex ratio was 0.9. The main reason for consultation was pruritus (22.65%). In 63.9% of the cases the child was referred by a family member whereas more than 1/3 of the children (39.07%) had previously been consulted by a pediatrician. Among children referred with a skin diagnosis, the half had a correct diagnosis The most prevalent disorders by category were dermatitis (57.9%) and infections (29.5%). Multiple diagnosis were made in 9.27% of the patients. The most common pathologies encountered were prurigo (23.2%), scabies (12.9%) and atopic dermatitis (9.6%). The lesions were mainly located on the head (23.31%) and the lower limbs (20.51%). In almost all cases (99.3%), the diagnosis was essentially clinical. Conclusion: Pediatric dermatoses are numerous and varied. They are dominated by Prurigo and Scabies. This study invites for close collaboration between pediatricians and dermatologists in order to optimize their therapeutic management. The knowledge
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