77 results on '"Ndiaye, Papa"'
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2. IMPACT DE LA GLOBALISATION FINANCIERE SUR LA PERFORMANCE DES SYSTEMES FINANCIERS DES PAYS DE LA CEDEAO : UNE APPROCHE PAR LA REGRESSION QUANTILE SUR DES DONNEES DE PANEL
- Author
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THIAM, Serigne and NDIAYE, Papa Mallé
- Subjects
Globalisation financière ,Développement financier ,Régression Quantile ,Données de Panel ,Méthodes d'aide à la décision multicritère - Abstract
Ce papier a pour objectif d’étudier l'impact de la globalisation financière sur le développement financier des pays de la CEDEAO. En utilisant les méthodes d’aide à la décision multicritère, ce papier élabore une nouvelle mesure du développement financier et étudie, à l’aide de la régression quantile l’impact de la globalisation financière sur le développement financier. Les résultats obtenus montrent que la Cote d’Ivoire tout début des années 2000, avait le système financier le plus développé dans l’espace CEDEAO. Cependant, son système financier s’est largement dégradé du fait des différentes crises politiques. A partir de 2004, le Cap-Vert devient le pays dont le système financier est le plus développé; et cela jusqu’en 2019. Les résultats de la régression quantile sur des données de panel montrent que la globalisation financière a un impact négatif sur le système financier des pays du quantile d’ordre 25%. Cependant, pour les autres quantiles (50% et 75%), l’ouverture internationale a un effet positif sur le développement financier.
- Published
- 2023
- Full Text
- View/download PDF
3. Kalman filter model, as a tool for short-term forecasting of solar potential: case of the Dakar site
- Author
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Mbaye A., Ndong J., NDiaye M.L., Sylla M., Aidara M.C., Diaw M., NDiaye M.F., Ndiaye Papa Alioune, and Ndiaye A.
- Subjects
Kalman filter ,solar potential ,Prediction ,Dakar ,short-term ,Environmental sciences ,GE1-350 - Abstract
The prediction of solar potential is an important step toward the evaluation of PV plant production for the best energy planning. In this study, the discrete Kalman filter model was implemented for short-term solar resource forecasting one the Dakar site in Senegal. The model input parameters are constituted at a time t of the air temperature, the relative humidity and the global solar radiation. The expected output at time t+T is the global solar radiation. The model performance is evaluated with the square root of the normalized mean squared error (NRMSE), the absolute mean of the normalized error (NMAE), the average bias error (NMBE). The model Validation is carried out by means of the data measured within the Polytechnic Higher School of Dakar for one year. The simulation results following the 20 minute horizon show a good correlation between the prediction and the measurement with an NRMSE of 4.8%, an NMAE of 0.27% and an NMBE of 0.04%. This model could contribute to help photovoltaic based energy providers to better plan the production of solar photovoltaic plants in Sahelian environments.
- Published
- 2018
- Full Text
- View/download PDF
4. Studies on the avian and mammalian fauna in the Great Green Wall area (Ferlo, Senegal)
- Author
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Ndiaye, Papa, Niang, Anna, Diop, Ablaye, Laboratoire de Biologie Animale, Faculté des Sciences et Techniques, UCAD, Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), LabEx DRIIHM, and ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011)
- Subjects
Sénégal ,OHMi Tessekere ,13. Climate action ,Sciences de l'environnement/Biodiversité et Ecologie ,domain_sde/domain_sde.be ,14. Life underwater ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,15. Life on land ,Grands mammifères ,Environmental Sciences/Biodiversity and Ecology - Abstract
La dégradation continue des écosystèmes sahéliens au Sud du Sahara sous l’effet d’aléas climatiques et anthropiques a motivé des chefs d’Etats Africains à mettre en place le projet de reboisement de la Grande Muraille Verte pour favoriser la restauration des habitats. C’est dans ce cadre que nous intervenons en orientant nos travaux sur l’étude de la faune sauvage, en particuliers les oiseaux et grands mammifères sauvages pour mettre en place des données scientifiques utiles pour la conservation de la biodiversité dans cette zone.Ainsi, nous avons pu identifier au cours de nos travaux 167 espèces d’oiseaux appartenant à 52 familles et 21 ordres dont : 38 espèces d’oiseaux d’eau et 129 espèces d’oiseaux terrestres. Parmi ces espèces, nous en avons 3 classées dans la catégorie « En danger critique d’extinction (CR) » sur la liste rouge des espèces protégées de l’Union Internationale pour la Conservation de la Nature (UICN) : le Vautour Africain, le Vautour charognard et le Vautour de rüppell; 3 dans la catégorie « En danger (EN) » : Aigle martial, Vautour oricou et Bateleur des savanes ; 3 dans la catégorie « Vulnérable (VU) » : la Pie-grièche méridionale, le Bucorve d’Abyssinie et en fin 1 espèce « Quasi menacée (NT) » : la Barge à queue noire.Nous avons identifié par ailleurs 9 espèces de grands mammifères sauvages appartenant à 7 familles et 3 ordres. Ces espèces sont respectivement la Mangouste des marais, la Genette commune, le Chacal doré, le Renard pâle, le Chat sauvage, le Ratel, la Zorille commune, le Lièvre du cap et le singe Patas. À part le singe Patas classée comme une espèce « Quasi menacée (NT) », toutes les autres sont à « Préoccupation mineure (LC) ». Mais le niveau de conservation de ces espèces au niveau local exige la mise en place d’une liste nationale, afin de renforcer le dispositif de conservation et de gestion de la biodiversité., The continuous degradation of Sahelian ecosystems in south of the Sahara due to climatic and anthropogenic factors has motivated African heads of states to set up the Great Green Wall reforestation project to promote habitat restoration. Within this framework, we contribute by orienting our work on the study of wildlife, in particular birds and large wild mammals, in order to set up useful scientific data for the conservation of biodiversity in this area.In the course of our work, we were able to identify 167 bird species belonging to 52 families and 21 orders, including 38 species of waterbirds and 129 species of landbirds. Among these species, we have the African vulture, the Hooded vulture and the Rüppell's vulture classified in the category "Critically Endangered (CR)" on the red list of protected species of the International Union for Conservation of Nature (IUCN); three “Endangered (EN)” species: the Martial Eagle, the Nubian vulture and the Bateleur; three “Vulnerable (VU)” species: the Southern Grey shrike, the Abyssinian ground hornbill and the European turtle dove and one “Near threatened (NT)” species: the Black-tailed godwit.In case of large wild mammals, we identified 9 species belonging to 7 families and 3 orders. These species are respectively the Marsh mongoose, the Common genet, the Golden jackal, the Pale fox, the Wild cat, the Honey badger, the Striped polecat, the Cape hare and the Patas Monkey. Except to the Patas monkey, which is classified as Near Threatened (NT), all the others are classified of as “least concern (LC)”. However, the level of conservation of these species at the local level exhibit an urgent need to implement a national list of threatened species for biodiversity conservation and management.
- Published
- 2021
- Full Text
- View/download PDF
5. VARIABILITÉ PLUVIOMÉTRIQUE ET ÉVOLUTION DE LA SÉCHERESSE CLIMATIQUE DANS VALLÉE DU FLEUVE SÉNÉGAL
- Author
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Ba, Djibrirou Daouda, Ndiaye, Papa Malick, Faye, Cheikh, Laboratoire Leidi ( dynamiques des territoires et développement) (Leidi), Université Gaston Berger de Saint-Louis Sénégal (UGB), and BA, Djibrirou Daouda
- Subjects
[SDE] Environmental Sciences ,Sécheresse ,Test de rupture ,Vallée du fleuve Sénégal ,[SHS.GEO] Humanities and Social Sciences/Geography ,[SDE]Environmental Sciences ,[SHS.GEO]Humanities and Social Sciences/Geography ,Mots clés : Pluviométrie ,Température ,Indices d’aridité - Abstract
International audience; Résumé L’une des manifestations du changement climatique est la variation spatiale et temporelle de la pluviométrie surtout dans les pays sahéliens. Dans ce contexte, il est important d’étudier la variabilité de la pluviométrie et l’évolution de la Sécheresse. Ainsi, la vallée du fleuve Sénégal affectée par la sécheresse depuis les années 1970 revêt un intérêt scientifique et économique majeur. L’objectif de cette étude est d’analyser la variabilité pluviométrique et l’évolution de la sécheresse dans la moyenne et basse vallée du fleuve Sénégal. Pour ce faire, les données mensuelles de de température et de la pluviométrie sont collectées aux stations de Bakel, Matam, Podor et Saint-Louis. La variabilité interannuelle de pluie est analysée avec les indices d’anomalie de Lamb et les tests statistiques d’homogénéité de Buishand et de Hubert. Les indices de De Martonne et de Gaussen sont également utilisés pour analyser la température et son rapport avec la pluviométrie. Les résultats montrent que l’indice de Lamb a permis de détecter 32 années sèches et 26 années humides sur la période 1961-2017 pour les stations de Bakel, Saint-Louis, Podor et Matam. Saint-Louis enregistre, par contre, 27 années humides et 31 sèches. De plus, les séries ne sont pas stationnaires et des ruptures sont présentes dans la décennie 1961-1970 pour toutes les stations. Les indices de De Martonne et de Gaussen permettent de noter une importante variabilité spatiotemporelle de la pluviométrie. Toutefois, malgré quelques années humides notées, la sécheresse climatique persiste toujours dans la Vallée du fleuve Sénégal.
- Published
- 2018
6. Migration d’étude, migration de travail: deux faces indissociables d’une même réalité?
- Author
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Ndiaye, Papa Oumar, Maison des sciences humaines, MSH Poitiers, Groupe de Recherche et d’Etudes Sociologiques sur les sociétés COntemporaines (GRESCO), Université de Poitiers-Institut Sciences de l'Homme et de la Société (IR SHS UNILIM), Université de Limoges (UNILIM)-Université de Limoges (UNILIM), CPER 'INnovation Sociale, Economique et Culturelle dans des Territoires en mutation' (MSHS Poitiers) (CPER INSECT), Maison des sciences de l'homme et de la société de Poitiers (MSHS), and Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)
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Niederlassung ,Studium ,Work ,Geldtransfer ,Fixation ,[SHS]Humanities and Social Sciences ,travail ,Study ,étude ,[SHS] Humanities and Social Sciences ,transfert d’argent ,Migration ,Arbeit ,Money transfers - Abstract
Wir kommen auf die Frage der internationalen Geldüberweisungen zurück und schlagen eine Verlagerung des Fokus auf Transferleistungen von Studierenden vor, die in diesem Forschungsbereich oft unterschätzt oder sogar ignoriert werden. Anhand soziologischer und ethnographischer Methoden mit Interviews und Beobachtungen wird zunächst gezeigt, dass diese Transfers existieren und sozial identifizierbaren Normen entsprechen. Weiterhin wird beschrieben, wie sich diese Transfers nach und nach verändern und von einer temporären Studienmigration zu einer langfristigen oder dauerhaften Arbeitsmigration führen können., This work intends to revisit the issue of migrants’ international remittances. However, it proposes to reconsider the issue through another perspective bystudying foreign students’ money transfers which are often underestimated or even ignored in those works. Thus, through sociological and ethnographicmethods, interviews and observations, we will first of all show that such transfers do exist and meet socially identifiable standards. Then, we’ll see howthese transfers could gradually lead to changes in the nature of a temporary migration for studies to a long-term or final migration., Ce travail se propose de revenir sur la question des transferts d’argent internationaux des migrants. Il propose cependant un décentrement des regardsvers les transferts des étudiants qui sont souvent sous-estimés voire ignorés dans ces approches. Ainsi, à travers des méthodes sociologiques et ethnographiques d’entretiens et d’observations, nous allons montrer d’abord que ces transferts existent et répondent à des normes socialement identifiables. Ensuite, voir comment ces transferts peuvent conduire progressivement à une transformation de la nature d’une migration d’étude temporaire à une migration de longue durée ou définitive.
- Published
- 2018
7. DYNAMIQUES DE FAISCEAUX DESIGNING AN ACCELERATED ENDURANCE TEST FOR AUTOMOTIVE DYNAMIC WIRING ASSEMBLY
- Author
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Edeline, Gwenael, Ndiaye, Papa, and ALJARF, ALI
- Subjects
[SPI] Engineering Sciences [physics] - Abstract
Summary The purpose of this paper is to present a method for designing the endurance test for a wheel speed sensor dynamic harness. This one is adapted to different front and rear axle and to the diversity of beams, without it is necessary to do breaking test each time. Only one breaking test campaign is performed: a split-plot experiment method is used to quantify the impact of each parameters. For each new vehicle, only a mechanical beam characterization test campaign is needed to design the validation plan (accelerated tests)., Cette communication a pour objet la présentation d'une méthode de dimensionnement des essais d'endurance aux débattements des boucles dynamiques des faisceaux électriques des capteurs de vitesse roue. Celle-ci est adaptée aux différentes architectures de train et à la diversité des faisceaux, sans à avoir à réaliser des essais à rupture à chaque fois. Une seule campagne d'essais à rupture est réalisée au préalable : un plan d'expérience de type split-plot est utilisé pour quantifier l'impact de chaque paramètre. Pour chaque nouvelle application, seule une rapide campagne d'essais de caractérisation mécanique des faisceaux est nécessaire pour dimensionner le plan de validation (essais accélérés).
- Published
- 2018
8. DIMENSIONNEMENT D'UN ESSAI ACCELERE D'ENDURANCE AUX DEBATTEMENTS DES BOUCLES DYNAMIQUES DE FAISCEAUX
- Author
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Edeline, Gwenael, Ndiaye, Papa, and ALJARF, ALI
- Subjects
[SPI] Engineering Sciences [physics] - Abstract
Summary The purpose of this paper is to present a method for designing the endurance test for a wheel speed sensor dynamic harness. This one is adapted to different front and rear axle and to the diversity of beams, without it is necessary to do breaking test each time. Only one breaking test campaign is performed: a split-plot experiment method is used to quantify the impact of each parameters. For each new vehicle, only a mechanical beam characterization test campaign is needed to design the validation plan (accelerated tests)., Cette communication a pour objet la présentation d'une méthode de dimensionnement des essais d'endurance aux débattements des boucles dynamiques des faisceaux électriques des capteurs de vitesse roue. Celle-ci est adaptée aux différentes architectures de train et à la diversité des faisceaux, sans à avoir à réaliser des essais à rupture à chaque fois. Une seule campagne d'essais à rupture est réalisée au préalable : un plan d'expérience de type split-plot est utilisé pour quantifier l'impact de chaque paramètre. Pour chaque nouvelle application, seule une rapide campagne d'essais de caractérisation mécanique des faisceaux est nécessaire pour dimensionner le plan de validation (essais accélérés).
- Published
- 2018
9. Role and regulation of VEGF-C in clear cell renal cell carcinomas
- Author
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Ndiaye , Papa Diogop, Institut de Recherche sur le Cancer et le Vieillissement (IRCAN), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Université Côte d'Azur, Gilles Pagès, Institut de Recherche sur le Cancer et le Vieillissement ( IRCAN ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université Nice Sophia Antipolis ( UNS ), and Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA )
- Subjects
Hypoxie ,[ SDV.BC ] Life Sciences [q-bio]/Cellular Biology ,[ SDV.MHEP ] Life Sciences [q-bio]/Human health and pathology ,CCRCC ,Lymphangiogenèse ,Cancer du rein à cellules claires ,VEGF-C ,[SDV.BC]Life Sciences [q-bio]/Cellular Biology ,Lymphangiogenesis ,Hypoxia ,HIF2α ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Hypoxic zones are common features of metastatic tumors. Renal cell carcinoma (RCC) expressing the Hypoxia Inducible Factor (HIF) because of inactivation of the von Hippel Lindau gene (vhl), represent models of chronic hypoxia. Their outcome depends on the extent of their dissemination at diagnosis. Therefore, deciphering the mechanisms of metastasis is a major concern. The Vascular Endothelial Growth Factor C (VEGFC)-dependent development of a lymphatic network is in front line of metastatic spreading. To address the role of VEGFC in RCC dissemination, we studied its expression in hypoxia and we invalidated its gene in human and mouse model cell lines of RCC. Hypoxia down-regulates VEGFC mRNA through a decrease in transcription and mRNA stability but concomitantly induced VEGFC protein expression. Increased proliferation and migration abilities, over-activation of the AKT signaling pathway and enhanced expression of mesenchymal and stem cell markers characterized vegfc-/- cells. Whereas vegfc-/- cells do not form tumors in immuno-deficient mice, they develop aggressive tumors in immuno-competent mice. Moreover, mouse RCC cells generate fast-growing tumors in mice invalidated for six1 or eya2, two major regulators of VEGFC expression. Lymphangiogenic markers overexpression including VEGFC is linked to increased disease-free and overall survival in patients with non-metastatic tumors whereas decreased progression-free and overall survival is observed for metastatic patients. Our experiments describe a subtle regulation of VEGFC by hypoxia and highlight its beneficial or pejorative role. Therefore, targeting VEGFC for therapy must be considered with caution.; Le carcinome à cellules rénales (RCC) exprimant le facteur inductible de l'hypoxie (HIF) en raison de l'inactivation du gène de von Hippel Lindau (vhl), représente un modèle d'hypoxie chronique. Le devenir des patients dépend du stade de dissémination des cellules tumorales. Par conséquent, déchiffrer les mécanismes de métastase est une préoccupation majeure. Le développement dépendant du VEGF-C (Vascular Endothelial Growth Factor C) d'un réseau lymphatique est en première ligne de propagation métastatique. Pour étudier le rôle de VEGFC dans la dissémination du RCC, nous avons étudié son expression dans l'hypoxie et nous avons invalidé son gène dans des lignées cellulaires humaines et murines. L'hypoxie régule négativement l'ARNm de VEGFC par une diminution de la transcription et de la stabilité de l'ARNm mais l'expression de la protéine VEGF-C est induite par l’hypoxie. Des capacités accrues de prolifération et de migration, et une meilleure expression des marqueurs mésenchymateux et des marqueurs souches caractérisent les cellules vegf-c -/-. Alors que les cellules vegfc -/- ne forment pas de tumeurs chez les souris immunodéficientes, elles développent des tumeurs agressives chez les souris immunocompétentes. La surexpression de VEGFC, est liée à une augmentation de la survie sans progression et globale chez les patients atteints de tumeurs non métastatiques alors qu'une diminution de la survie sans progression et globale est observée chez les patients métastatiques. Nos expériences décrivent une régulation subtile du VEGF-C par hypoxie et mettent en évidence son rôle bénéfique ou péjoratif. Par conséquent, le ciblage VEGF-C pour la thérapie doit être considéré avec prudence.
- Published
- 2017
10. Rôle et régulation du VEGF-C dans les cancers du rein à cellules claires
- Author
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Ndiaye, Papa Diogop, Institut de Recherche sur le Cancer et le Vieillissement (IRCAN), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Université Côte d'Azur, Gilles Pagès, and STAR, ABES
- Subjects
Hypoxie ,[SDV.MHEP] Life Sciences [q-bio]/Human health and pathology ,CCRCC ,Lymphangiogenèse ,Cancer du rein à cellules claires ,VEGF-C ,[SDV.BC]Life Sciences [q-bio]/Cellular Biology ,Lymphangiogenesis ,Hypoxia ,HIF2α ,[SDV.BC] Life Sciences [q-bio]/Cellular Biology ,[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology - Abstract
Hypoxic zones are common features of metastatic tumors. Renal cell carcinoma (RCC) expressing the Hypoxia Inducible Factor (HIF) because of inactivation of the von Hippel Lindau gene (vhl), represent models of chronic hypoxia. Their outcome depends on the extent of their dissemination at diagnosis. Therefore, deciphering the mechanisms of metastasis is a major concern. The Vascular Endothelial Growth Factor C (VEGFC)-dependent development of a lymphatic network is in front line of metastatic spreading. To address the role of VEGFC in RCC dissemination, we studied its expression in hypoxia and we invalidated its gene in human and mouse model cell lines of RCC. Hypoxia down-regulates VEGFC mRNA through a decrease in transcription and mRNA stability but concomitantly induced VEGFC protein expression. Increased proliferation and migration abilities, over-activation of the AKT signaling pathway and enhanced expression of mesenchymal and stem cell markers characterized vegfc-/- cells. Whereas vegfc-/- cells do not form tumors in immuno-deficient mice, they develop aggressive tumors in immuno-competent mice. Moreover, mouse RCC cells generate fast-growing tumors in mice invalidated for six1 or eya2, two major regulators of VEGFC expression. Lymphangiogenic markers overexpression including VEGFC is linked to increased disease-free and overall survival in patients with non-metastatic tumors whereas decreased progression-free and overall survival is observed for metastatic patients. Our experiments describe a subtle regulation of VEGFC by hypoxia and highlight its beneficial or pejorative role. Therefore, targeting VEGFC for therapy must be considered with caution., Le carcinome à cellules rénales (RCC) exprimant le facteur inductible de l'hypoxie (HIF) en raison de l'inactivation du gène de von Hippel Lindau (vhl), représente un modèle d'hypoxie chronique. Le devenir des patients dépend du stade de dissémination des cellules tumorales. Par conséquent, déchiffrer les mécanismes de métastase est une préoccupation majeure. Le développement dépendant du VEGF-C (Vascular Endothelial Growth Factor C) d'un réseau lymphatique est en première ligne de propagation métastatique. Pour étudier le rôle de VEGFC dans la dissémination du RCC, nous avons étudié son expression dans l'hypoxie et nous avons invalidé son gène dans des lignées cellulaires humaines et murines. L'hypoxie régule négativement l'ARNm de VEGFC par une diminution de la transcription et de la stabilité de l'ARNm mais l'expression de la protéine VEGF-C est induite par l’hypoxie. Des capacités accrues de prolifération et de migration, et une meilleure expression des marqueurs mésenchymateux et des marqueurs souches caractérisent les cellules vegf-c -/-. Alors que les cellules vegfc -/- ne forment pas de tumeurs chez les souris immunodéficientes, elles développent des tumeurs agressives chez les souris immunocompétentes. La surexpression de VEGFC, est liée à une augmentation de la survie sans progression et globale chez les patients atteints de tumeurs non métastatiques alors qu'une diminution de la survie sans progression et globale est observée chez les patients métastatiques. Nos expériences décrivent une régulation subtile du VEGF-C par hypoxie et mettent en évidence son rôle bénéfique ou péjoratif. Par conséquent, le ciblage VEGF-C pour la thérapie doit être considéré avec prudence.
- Published
- 2017
11. Facteurs de risque dans la gestion des projets de développement international
- Author
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Ndiaye, Papa Modou and Ndiaye, Papa Modou
- Subjects
- Project management, Economic development projects--Management, International economic relations
- Abstract
La question de l'efficacité de la gestion des projets de développement intéresse au plus haut niveau les décideurs publics et les partenaires techniques et financiers. Cet ouvrage propose une approche managériale et académique de l'analyse du succès ou de l'échec des projets de développement et particulièrement à travers les facteurs de risque dans la gestion des projets de développement international, mal connus et peu étudiés en sciences de gestion dans les pays moins développés. Combinant son expérience personnelle et une large revue de la littérature, une étude quantitative a été menée auprès des principales parties prenantes que sont le bailleur de fonds, l'administration publique et le coordonnateur de projets. L'ouvrage sera utile à tout praticien de la gestion des projets car il a : - identifié les facteurs de risque dans la gestion des projets de développement international ; - élaboré une classification des facteurs de risque en fonction des parties prenantes ; - établi les liens entre facteurs de risque et le triptyque qualité, coût et délai ; - mesuré l'impact du défaut de qualité du dépassement de coût et du dépassement de délai sur la gestion des projets ; - formulé des recommandations et mesures de mitigation pour assurer le succès des projets.
- Published
- 2017
12. Détection et mesure de défauts sur des modules photovoltaïques en silicium cristallin par électroluminescence et par imagerie infrarouge après dix années d’exposition au Sénégal
- Author
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Ndiaye, Ababacar, Kébé, Cheikh M.F., CHARKI, Abdérafi, Sambou, Vincent, Ndiaye, Papa, Université Assane SECK de Ziguinchor (UASZ), École Supérieure Polytechnique de Dakar (ESP), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), and Université d'Angers (UA)
- Subjects
[SPI]Engineering Sciences [physics] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2017
13. Mesures en vue de l’étude de la relation entre la densité de poussière accumulée à la surface des modules PV et la dégradation de leurs caractéristiques de performance
- Author
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Ndiaye, Ababacar, Kébé, Cheikh M.F., Bilal, B.O, CHARKI, Abdérafi, Sambou, Vincent, Ndiaye, Papa, École Supérieure Polytechnique de Dakar (ESP), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), and Université d'Angers (UA)
- Subjects
[SPI]Engineering Sciences [physics] ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2016
14. Systématique et phylogénie de Plathelminthes parasites: Trématodes et Cestodes: Apports des études ultrastructurales de la reproduction
- Author
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Ndiaye, Papa Ibnou, Miquel, Jordi, Marchand, Bernard, Quilichini, Yann, Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), University of Barcelona, Sciences pour l'environnement (SPE), and Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP)
- Subjects
[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging ,[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2015
15. Mesure des caractéristiques électriques des modules photovoltaïques en vue de l’évaluation de leur dégradation
- Author
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Ndiaye, Ababacar, Kébé, Cheikh M.F., CHARKI, Abdérafi, Sambou, Vincent, Ndiaye, Papa, École Supérieure Polytechnique de Dakar (ESP), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS), and Université d'Angers (UA)
- Subjects
[SPI]Engineering Sciences [physics] ,ComputingMilieux_MISCELLANEOUS - Abstract
National audience
- Published
- 2015
16. VEGF-C et vaisseaux lymphatiques: Une épée à double tranchant dans le développement tumoral et la dissémination métastatique.
- Author
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Ndiaye, Papa Diogop and Pagès, Gilles
- Published
- 2019
- Full Text
- View/download PDF
17. Introduction à la politique africaine Mamoudou Gazibo
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Ndiaye, Papa Samba
- Published
- 2009
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18. La guerre et la paix. Approches contemporaines de la sécurité et de la stratégie Charles Philippe David
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Ndiaye, Papa Samba
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- 2008
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19. VITELLOGENESE DE CREPIDOSTOMUM METOECUS BRAUN, 1900 (DIGENEA, ALLOCREADIIDAE), PARASITE INTESTINAL DE SALMO TRUTTA (PISCES, TELEOSTEI)
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Quilichini, Yann, Greani, Samuel, Foata, J., Antonelli, Laetitia, Ndiaye, Papa Ibnou, Bâ, Cheick Tidiane, Marchand, Bernard, Sciences pour l'environnement (SPE), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Parasites et Ecosystèmes Méditerranéens (PEM), Laboratoire de Parasitologie, Dakar, Sénégal, and Quilichini, Yann
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[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging ,[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging - Abstract
International audience; La vitellogénèse de Crepidostomum metoecus a été étudiée en microscopie électronique à transmission. Les glandes vitellines contiennent des vitellocytes à différents stades de développement, dont les plus jeunes cellules sont situées en périphérie des lobes vitellins. Cette maturation se divise en quatre principaux stades. Au premier stade de maturation, les vitellocytes sont indifférenciés et possèdent un ratio nucléo-cytoplasmique élevé. Le cytoplasme est principalement composé de ribosomes libres, de quelques mitochondries et de saccules de réticulum endoplasmique. De l'hétérochromatine est présente dans le nucléoplasme. Au deuxième stade, le ratio nucléo-cytoplasmique décroît, des complexes de Golgi sont visibles dans le cytoplasme. À ce stade, les globules destinés à former la future coquille de l'œuf sont synthétisés, et des saccules de réticulum endoplasmique en forme circulaire sont observés. Le noyau contient souvent un nucléole. Au troisième stade de maturation, les globules individuels se regroupent en forme de grappes. Il y a moins de mitochondries et de saccules de réticulum endoplasmique. Quelques petites gouttelettes lipidiques sont observées dans le cytoplasme. Au dernier stade de maturation, il y a beaucoup de grappes de globules destinés à former la coquille (> 30 par section transversale). Le cytoplasme contient aussi quelques mitochondries et des saccules de réticulum endoplasmique en périphérie de la cellule. Les vitellocytes mature de Crepidostomum metoecus possèdent un fort contenu lipidique (> 10 gouttelettes lipidiques par section transversale). Cette caractéristique est certainement due au cycle de vie du parasite. La méthode de Thiéry a été utilisée pour localiser les polysaccharides et les granules de glycogène.
- Published
- 2012
20. Redescription de Glossobothrium nipponicum (Cestode, Bothriocephalidea) parasite de Schedophilus velaini (Poisson, Perciformes, Centrolophidae) au Sénégal
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Bâ, Aïssatou, Quilichini, Yann, Ndiaye, Papa Ibnou, Bâ, Cheick Tidiane, Marchand, Bernard, Laboratoire de Parasitologie, Dakar, Sénégal, Sciences pour l'environnement (SPE), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Parasites et Ecosystèmes Méditerranéens (PEM), and Quilichini, Yann
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[SDV.IB.IMA] Life Sciences [q-bio]/Bioengineering/Imaging ,[SDV.IB.IMA]Life Sciences [q-bio]/Bioengineering/Imaging ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2012
21. L'islam politique au sud du Sahara-identités, discours et enjeux Muriel Gomez-Perez
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Ndiaye, Papa Samba
- Published
- 2006
22. Le gouvernement du monde. Une critique politique de la globalisation Jean François Bayart
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Ndiaye, Papa Samba
- Published
- 2005
23. Les territoires de la mondialisation Guy Mercier
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Ndiaye, Papa Samba
- Published
- 2005
24. La compétence civique. Comment les citoyens informés contribuent au bon fonctionnement de la démocratie Henry Milner
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Ndiaye, Papa Samba
- Published
- 2005
25. Entre contraintes et bonnes intentions: Les difficultés des organisations internationales africaines dans le domaine du maintien de la paix. L’exemple de la communauté économique des États de l’Afrique de l’Ouest (CEDEAO) en Côte d’Ivoire et ailleurs (Libéria, Sierra Leone, Guinée Bissau) de 1990 à 2003
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Ndiaye, Papa Samba
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Relations internationales ,CEDEAO ,Guinee Bissau ,Afrique de l'Ouest ,International Relations ,Organisations internationales ,International studies ,Casamance ,ECOWAS ,Liberia ,Paix et securite ,Etudes internationales ,Sierra Leone ,Afrique ,Peacekeeping ,Rebellions ,Cote d'Ivoire ,Guerre et paix ,Maintien de la paix ,International organizations ,International Development ,Developpement international - Abstract
This thesis tries to understand and explain the problems facing African international organizations in peacekeeping operations. The focus is on the case of the intervention by the Economic Community of West African States (ECOWAS) in Ivory Coast. The analysis will also discuss, in order to permit comparative analysis, the intervention of this same organization in Liberia, Sierra Leone and Guinea Bissau. This case study in comparative perspective can help to mitigate the disadvantage of a case study, whose main weakness is the problem of generalization from the results of one case. The literature in International Relations and peacekeeping operations is used to develop some hypotheses that we will try to test in this dissertation, specifically: the internal difficulties of international organizations; the problems of lessons learned in terms of peacekeeping operations; the balance of power between and the pursuit of the national interest by members states of the organization; the key role of international and foreign actors, such as former colonial masters, in the peace process; and finally, the problem of coordination between different actors. To answer to the research question, the dissertation will be written in the form of a story with different concentric circles. First, for the internal international organizations difficulties, we will use the functionalist approach which is one of the best theorizations of this issue. However, these internal obstacles are only the tip of the iceberg of the problem because behind the organization we have conflicts of interest between different member states and the intervention of former colonial masters that realists and the neo-marxists would anticipate. Nevertheless, these tend to emphasize more on states. As a consequence, they cannot help us to solve the huge issue of coordination between different actors. To respond to this problem, we turn to the model of multi-level governance and demonstrate its value in analysing this case. For the case of Ivory Coast, Liberia and Sierra Leone, we will use both primary and secondary literatures. However, for the case of Guinea Bissau, we will use only secondary literature. RESUME: Cette thèse vise à comprendre et à expliquer les difficultés des organisations internationales africaines dans le domaine du maintien de la paix. La question est étudiée par le moyen d’une étude de cas mais dans une perspective comparative. Car elle permet d’atténuer l’inconvénient majeur de l’étude de cas qui est la question de la généralisation. En effet, nous analyserons les difficultés de la communauté économique des États d’Afrique de l’Ouest (CEDEAO) dans la gestion de la crise ivoirienne en utilisant les interventions de cette même organisation au Libéria, en Sierra Leone et en Guinée Bissau pour la comparaison à des fins d’apprentissages. La littérature en Relations internationales et sur le maintien de la paix nous a suggéré les hypothèses suivantes que nous testerons : les difficultés intrinsèques des organisations internationales; les difficultés d’apprentissage de ces mêmes organisations dans le domaine du maintien de la paix; les jeux de puissances et d’intérêt entre États membres de l’organisation internationale; la confiscation incomplète des relations internationales ouest africaines par des acteurs, des enjeux et des intérêts étrangers; enfin, il y a la difficulté de la coordination des actions entre les différents acteurs impliqués dans les processus de résolution des crises. Nous répondrons à la question de recherche en forme de récit avec des cercles concentriques. D’abord pour aborder les difficultés intrinsèques, nous convoquerons les fonctionnalistes qui ont théorisé le mieux la question des organisations internationales. Mais, on s’est vite rendu compte que ces difficultés n’étaient que la face visible de l’iceberg et que derrière l’organisation se cachent des jeux de puissances et d’intérêt, mais aussi l’ingérence des anciennes puissances coloniales que les réalistes et les néo-marxistes avaient prévues. Mais ces derniers mettent surtout l’emphase sur l’État. Ce qui ne permet pas de résoudre la lancinante question de la pluralité des acteurs, des conflits de logiques et de l’articulation des efforts des différents intervenants que l’approche de la gouvernance à paliers multiples permet de prévoir. Pour la Côte d’Ivoire, le Libéria et la Sierra Leone nous utiliserons à la fois de la littérature primaire et secondaire. Mais pour la Guinée Bissau, nous nous appuierons uniquement sur de la littérature secondaire.
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- 2011
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26. Gestion de tâches de diagnostic à base d’un système distribué
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Niang, Boubacar, Adjallah, Kondo Hloindo, Ndiaye, Papa A., Université de Technologie de Troyes (UTT), Institut des Sciences et Technologies de l'Information de Troyes (ISTIT), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), CIFRES - Centre International de Formation et de Recherche en Energie Solaire, Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Oliver Sénéchal, Laboratoire d'Optimisation des Systèmes Industriels (LOSI), Institut Charles Delaunay (ICD), and Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
[SPI]Engineering Sciences [physics] ,Système distribué ,Scheduling ,Diagnosis ,Ordonnancement ,[MATH.MATH-DS]Mathematics [math]/Dynamical Systems [math.DS] ,Task ,Distributed system ,Temps-réel ,Diagnostic ,Real-time ,Tâche - Abstract
International audience; We propose a general model of automatic remote management of diagnosis activities of a set of distributed equipment. The model comprises three sub-models: resource allocation to the tasks subjected to exclusiveness constraints, scheduling of tasks under precedence constraints, and dynamic planning of periodic, a-periodic, and stochastic tasks. A stochastic queuing model is then worked out for dynamic planning coupled with the appropriate task scheduling and resource allocation models. Simulation experimental results are finally provided to evaluate the operational performances of the general model.; Nous proposons un modèle général de gestion automatisée à distance des activités de diagnostic d’une ensemble d’équipement réparti. Ce modèle résulte de la composition de trois sous modèles : allocation des ressources aux tâches sous contrainte d’exclusivité, ordonnancement de tâches sous contrainte de précédence et planification dynamique des tâches périodiques, apériodiques et stochastiques. Un modèle de files d’attente stochastique est alors élaboré pour la planification dynamique, couplé aux modèles appropriés d’ordonnancement de tâches et allocation de ressources. Des résultats expérimentaux sont enfin fournis pour l’évaluation des performances accessibles.
- Published
- 2005
27. Systématique et Phylogénie de Plathelminthes parasites ('Trematoda et Cestoda'): apport des études ultrastructurales de la reproduction
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Ndiaye, Papa Ibnou, Marchand, Bernard, Miquel Colomé, Jordi, and Universitat de Barcelona. Departament de Microbiologia i Parasitologia Sanitàries
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Reproducció ,Microscopia de rastreig ,Tècnica de "Whole Mount" ,Reproduction ,Cestodes ,Citologia ,Trematoda ,Tapeworms ,Microscopia electrònica ,Cytology ,Trematodes ,Ciències de la Salut - Abstract
El presente estudio constituye una importante contribución al conocimiento de la ultraestructura de la espermiogénesis y del espermatozoide de los Platelmintos parásitos. Los caracteres ultraestructurales de la reproducción, particularmente los del espermatozoide, son de gran utilidad para la Sistemática, la Taxonomía y la Filogenia de diversos grupos zoológicos, entre ellos el de los Platelmintos. Por ello, se ha estudiado ultraestructuralmente la espermiogénesis y el espermatozoide de siete especies de Platelmintos parásitos de distintas familias: cuatro Digénidos [Scaphiostomum palaearcticum Mas-Coma, Esteban et Valero, 1986 (Brachylaimidae), Fasciola hepatica, Linnaeus, 1758 y Fasiola gigantica Cobbold, 1856 (Fasciolidae) y Notocotylus neyrai González Castro, 1945 (Notocotylidae)] y tres Cestodos Cyclophyllidea [Joyeuxiella pasqualei (Diamare, 1893) y Joyeuxiella echinorhynchoides (Sonsino, 1899) (Dipylidiidae) y Taenia parva Baer, 1926 (Taeniidae)].Los helmintos, aislados tras disección de los hospedadores, han sido procesados según la metodología pertinente para los estudios ultraestructurales a que van encaminados. En el caso de F. gigantica se ha aplicado la técnica citoquímica de Thiéry para evidenciar la presencia de glucógeno en el gameto masculino. En el estudio de F. hepatica, dada la procedencia del material de la rata negra (Rattus rattus), hemos podido diseccionar el hospedador en el laboratorio y aplicar más fácilmente otras técnicas como son: 1) las técnicas inmunocitoquímicas para evidenciar la tubulina en el citoesqueleto del espermatozoide y 2) las de "whole mount" y de microscopía electrónica de barrido destinadas a la observación de espermatozoides enteros. Las técnicas inmunocitoquímicas de inmunomarcaje ultraestructural nos han permitido de detectar la presencia de las tubulinas contenidas en el citoesqueleto del espermatozoide mediante la utilización de anticuerpos monoclonales (anti-alfa-tubulina, anti-beta-tubulina, anti-tubulina acetilada y anti-tubulina tirosinada).Los resultados obtenidos en relación las especies estudiadas forman parte de las seis publicaciones expuestas en la Memoria. El estudio de S. palaearcticum es el cuarto trabajo realizado sobre la ultraestructura del gameto masculino en la familia Brachylaimidae y el primero de la subfamilia Ityogoniminae. En el caso de N. neyrai, el presente estudio constituye la primera aportación ultraestructural para la familia Notocotylidae. En la familia Fasciolidae se ha realizado un estudio comparado de la ultraestructura de la espermiogénesis y del espermatozoide de F. hepatica (parásito de Bos taurus en España y de Rattus rattus en Córcega) con la de F. gigantica (parásito de Bos indicus en Senegal). Para el género Joyeuxiella y, por extensión, para la familia Dipylidiidae, se establece el modelo general de la espermiogénesis y del espermatozoide dada la existencia de datos en dos de los tres géneros incluidos en esta familia. En el caso de T. parva, los resultados aportados contribuyen a la determinación de las características ultraestructurales del espermatozoide para las especies de la familia Taeniidae.Se efectua una completa revisión y discusión al respecto de diversos caracteres ultraestructurales del espermatozoide de los Digénidos, como son las ornamentaciones externas de la membrana y los cuerpos espinosos. Por otra parte, se describe la formación de una expansión citoplasmática dorso-lateral en el transcurso de la espermiogénesis en F. gigantica y F. hepatica. En el caso de los Cestodos, se describe por primera vez la formación de la vaina periaxonemal durante la espermiogénesis de Joyeuxiella spp. Además, ciertos caracteres de la espermiogénesis de los Digénidos y de los Cestodos primitivos como son la presencia de raíces estriadas y de rotación flagelar son igualmente observados respectivamente en los Cyclophyllidea Joyeuxiella spp. y T. parva.
- Published
- 2003
28. Consolidation de la paix et fragilité étatique. L’ONU en République centrafricaine.
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NDIAYE, Papa SAMBA
- Published
- 2016
- Full Text
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29. Title 13.
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Ndiaye, Papa, Niang, Khadim, and Diallo, Issakha
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- *
DYSTOCIA , *MEDICAL decision making , *MATERNAL mortality , *PREGNANCY complications , *HEALTH outcome assessment , *PREDICTION models - Abstract
Résumé: Le score de risque dystocique (SRD) comprend trois parties : une verticale où le bilan de la femme individualise huit éventualités ; une horizontale, où le bilan de la grossesse identifie sept éventualités, et une centrale de pronostic, subdivisée en trois zones (ű dangereuse Ƈ, ű douteuse Ƈ et ű d’espoir Ƈ). Le SRD est positif s’il existe au moins une croix dans la zone dangereuse et/ou deux croix dans la zone douteuse ; autrement, il est négatif. Le test de validation donne de bons résultats (sensibilité=83,61 % ; spécificité=90,05 % ; valeur prédictive positive=72,34 % ; valeur prédictive négative=94,04 %). L’utilisation du SRD à large échelle permet une identification plus rapide des femmes enceintes à haut risque de dystocie obstétricale. Une orientation à temps de ces dernières vers un centre spécialisé en soins obstétricaux et néonataux contribue à la réduction de la mortalité maternelle et de la mortinatalité. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
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30. Développement des chaînes de valeur et subventions commerciales dans le secteur de la pêche en Afrique de l'Ouest.
- Author
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Ndiaye, Papa Gora
- Published
- 2016
31. Le militaire en opérations multinationales. Regards croisés en Afghanistan, en Bosnie, au Liban.
- Author
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NDIAYE, Papa Samba
- Published
- 2013
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32. Introduction critique aux relations internationales du Québec. Esquisse d'un modèle formel de politique étrangère pour les États subétatiques.
- Author
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NDIAYE, Papa Samba
- Published
- 2011
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33. [Untitled]
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Ndiaye, Papa Samba
34. [Untitled]
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Ndiaye, Papa Samba
35. [Untitled]
- Author
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Samba Ndiaye, Papa
36. La fibrillation atriale dans trois centres cardiologiques de référence de Dakar: données sénégalaises de l'enquête du registre AFRICA.
- Author
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Diop, Khadimu Rassoul, Samb, Cheikh Ahmadou Bamba, Kane, Adama, Mingou, Joseph Salvador, Beye, Serigne Mor, Diouf, Youssou, Sarr, Simon Antoine, Aw, Fatou, Ndiaye, Papa Guirane, Mbacke Diop, Cheikh Ahmadou Bamba, Bodian, Malick, Ndiaye, Mouhamadou Bamba, Diao, Maboury, Adoubi, Anicet Kassi, and Kane, Abdoul
- Subjects
- *
YOUNG adults , *ATRIAL fibrillation , *HEART beat , *LEFT heart atrium , *HYPERTENSION , *HEART failure - Abstract
Introduction: atrial fibrillation (AF) is the most common cardiac rhythm disorder. Its prevalence is underestimated in Africa, hence the initiation of the Atrial Fibrillation Registry In Countries of Africa (AFRICA). The aim of our study was to describe, within the framework of the AFRICA registry, the epidemiological, clinical, paraclinical, therapeutic and evolutionary aspects of atrial fibrillation (AF) in Africa, particularly in Senegal. Methods: we performed a cross-sectional, retrospective, multicentric study conducted from January 1st to December 31st 2017, in three referral cardiology wards in Senegal. Results: one hundred and sixtyeight patients, with a mean age of 63 years, were selected, representing a hospital prevalence of 5.99%. There was a predominance of women with sex-ratio of 0.69. High blood pressure was the most frequent risk factor (24.4%). Heart failure was the most frequent circumstance of discovery (59.52%). AF was persistent in 52.24% and valvular AF accounted for 31% and was more frequent in young people (p= 0.005). Left ventricular systolic function was impaired in 55.7%, the left atrium was dilated in 70.83%. The strategy to reduce heart rate was the most used. Patients with CHA2DS2VASC ≥ 2 received anticoagulation with LMWH and oral relay maid mostly of VKA. The complications were dominated by heart failure (66.6%) and ischemic stroke cerebral (28%). Conclusion: atrial fibrillation (AF) is the most frequent cardiac rhythm disorder. It is a major public health concern. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
37. [Atrial fibrillation in three cardiological reference centers in Dakar: Senegal data from the AFRICA register survey].
- Author
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Diop KR, Samb CAB, Kane A, Mingou JS, Beye SM, Diouf Y, Sarr SA, Aw F, Ndiaye PG, Diop CABM, Bodian M, Ndiaye MB, Diao M, Adoubi AK, and Kane A
- Subjects
- Humans, Female, Adolescent, Middle Aged, Male, Senegal epidemiology, Cross-Sectional Studies, Heparin, Low-Molecular-Weight, Retrospective Studies, Atrial Fibrillation epidemiology, Cardiology, Heart Failure
- Abstract
Introduction: atrial fibrillation (AF) is the most common cardiac rhythm disorder. Its prevalence is underestimated in Africa, hence the initiation of the Atrial Fibrillation Registry In Countries of Africa (AFRICA). The aim of our study was to describe, within the framework of the AFRICA registry, the epidemiological, clinical, paraclinical, therapeutic and evolutionary aspects of atrial fibrillation (AF) in Africa, particularly in Senegal., Methods: we performed a cross-sectional, retrospective, multicentric study conducted from January 1
st to December 31st 2017, in three referral cardiology wards in Senegal., Results: one hundred and sixty-eight patients, with a mean age of 63 years, were selected, representing a hospital prevalence of 5.99%. There was a predominance of women with sex-ratio of 0.69. High blood pressure was the most frequent risk factor (24.4%). Heart failure was the most frequent circumstance of discovery (59.52%). AF was persistent in 52.24% and valvular AF accounted for 31% and was more frequent in young people (p= 0.005). Left ventricular systolic function was impaired in 55.7%, the left atrium was dilated in 70.83%. The strategy to reduce heart rate was the most used. Patients with CHA2DS2VASC ≥ 2 received anticoagulation with LMWH and oral relay maid mostly of VKA. The complications were dominated by heart failure (66.6%) and ischemic stroke cerebral (28%)., Conclusion: atrial fibrillation (AF) is the most frequent cardiac rhythm disorder. It is a major public health concern., Competing Interests: Les auteurs ne déclarent aucun conflit d´intérêts., (Copyright: Khadimu Rassoul Diop et al.)- Published
- 2022
- Full Text
- View/download PDF
38. [VEGF-C and lymphatic vessels: a double-edged sword in tumor development and metastasis].
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Ndiaye PD and Pagès G
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- Animals, Humans, Lymphatic Vessels physiology, Neoplasm Invasiveness genetics, Tumor Escape physiology, Carcinogenesis genetics, Carcinogenesis immunology, Lymphangiogenesis genetics, Lymphangiogenesis immunology, Neoplasm Metastasis genetics, Neoplasm Metastasis immunology, Neoplasm Metastasis pathology, Vascular Endothelial Growth Factor C physiology
- Abstract
The lymphatic system is made up of vessels that drain interstitial fluids throughout the body. The circulation of the lymph (liquid in the lymphatic system) in the lymphatic vessels is unidirectional: tissues to the lymph nodes and then to the veins. Ganglia are mechanical filters but also immune barriers that can block the progression of certain pathogens as well as cancer cells. However, most studies on the lymphatic system and cancer highlight the role of the lymphatic network in metastatic dissemination as tumor cells use this network to reach other organs. However, recent studies describe a beneficial role of the lymphatic system and of the vascular endothelial growth factor C (VEGF-C) which is one of the main factors responsible for the development of lymphatic vessels in cancer. In this review, we will illustrate this ambivalent and emerging role of VEGF-C and the lymphatic system in cancer aggressiveness., (© 2019 médecine/sciences – Inserm.)
- Published
- 2019
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39. [Overweight, obesity and associated factors among public secondary school students in Dakar].
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Ndiaye P, Leye MM, and Tal Dia A
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- Adolescent, Cross-Sectional Studies, Female, Humans, Male, Malnutrition epidemiology, School Health Services statistics & numerical data, Schools statistics & numerical data, Senegal epidemiology, Overweight epidemiology, Pediatric Obesity epidemiology, Students statistics & numerical data
- Abstract
These results support outreach activities for students, and the involvement of parents and teachers in strategies focused on food hygiene and sport..
- Published
- 2016
40. [Determinants of modern contraceptive use in the Mbacké health district (Senegal)].
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Leyé MM, Faye A, Diongue M, Wone I, Seck I, Ndiaye P, and Dia AT
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- Adolescent, Adult, Contraception statistics & numerical data, Contraception Behavior statistics & numerical data, Data Collection, Female, Health Knowledge, Attitudes, Practice, Humans, Middle Aged, Prevalence, Senegal epidemiology, Socioeconomic Factors, Young Adult, Contraceptive Agents therapeutic use
- Abstract
Introduction: Contraceptive prevalence is low in Senegal, particularly in the Mbacké health district. The objective of this study was to identify the determinants of use of modern contraception by women of reproductive age in this district., Methodology: A quantitative and qualitative analytical study was conducted. The quantitative survey was conducted from 1st to 20 July 2011. The study population consisted of women of childbearing age living in the district. A two-stage survey was conducted. Data were entered and bivariate analysis was performed using Epi Info 3.3.5software. Multivariate analysiswas performed by R 2.2.9 software. The adjusted odds ratios were calculatedfor variables with significant p values. The qualitative study was conducted from 25 to 31 July2011. Grouped interviews were used to collect women's perceptions of modern contraception. Content analysis was performed., Conclusion: Improving the socio-economic characteristics of women and raising public awareness about modern contraception would contribute to a better use of modern contraceptives in the Mbacké health district.
- Published
- 2015
41. [Study of determinants of rape in minors in the Kolda region of Senegal].
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Leye MM, Fare A, Wone I, Diedhiou D, Diongue M, Niang K, Seck I, Ndiaye P, and Dia AT
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- Adolescent, Adult, Child, Child, Preschool, Cross-Sectional Studies, Humans, Retrospective Studies, Senegal, Rape statistics & numerical data
- Abstract
Introduction: The objective of this study was to investigate the determinants of rape among minors in the Kolda region., Methodology: A retrospective, cross-sectional, descriptive and analytical was conducted from 23 December 1992 to 31 December 2011, based on the charts of rape victims under the age of 18 years. Sampling was complete. Bivariate and multivariate analyses were performed using Epi Info 3.3.2 and R 2.9.2 software, respectively., Results: The study included 162 cases of sexual assault. The mean age of victims was 12.3 +/- 3 years (range: 4-17 years). The mean age of perpetrators of sexual assault was 26.4 +/- 9.5 years and minors accounted for 13% of perpetrators. 54.9% of victims, were raped. Victims of sexual assault knew the perpetrator in 66% of cases and were attacked in broad daylight in 53.4% of cases. The perpetrators were drunk at the time of sexual assault in 15.3% of cases. The assault took place in the bush (14.8%). Twenty eight percent (28%) of rapists were jailed and 38.6% of them were jailed for between 5 and 10 years. Sexual assault in the bush [adjusted OR = 3.46 (1.02-11.77)] and intoxication of the perpetrator at the time of sexual assault [adjusted OR = 3.47 (1.04-11.61)] were associated with a high risk of rape. In contrast, victims who knew their assailants were at a lower risk of rape [adjusted OR = 0.09 (0.03 to 0.24)]., Conclusion: Extension of this study to the national scale would provide health and judicial authorities with an overview of sexual assault among minors, to allow more effective prevention at the national level.
- Published
- 2014
42. [Dystocia risk score: a decision making tool to combat maternal mortality].
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Ndiaye P, Niang K, and Diallo I
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- Adult, Dystocia prevention & control, Emergency Medical Services, Female, Humans, Marital Status, Obstetrics, Predictive Value of Tests, Pregnancy, Pregnancy Outcome, Prognosis, Reproducibility of Results, Risk Assessment, Senegal epidemiology, Stillbirth epidemiology, Dystocia epidemiology, Maternal Mortality trends
- Abstract
As a way to prevent maternal mortality and stillbirth, the dystocia risk score includes three components: a left column provides a list of eight characteristics to check for in the woman; an upper horizontal section provides a checklist of possible outcomes of the pregnancy itself: and a rectangular grid indicates the prognosis in three zones: a large red (dangerous), a medium-sized grey (doubtful) and a small blue (hopeful). The DRS is positive if there is at least one cross in the dangerous zone and/or two crosses in the doubtful zone (it indicates that the woman should be referred to a center specialized in obstetric emergency care); elsewhere, the DRS is negative. The validation test gives good results (sensitivity=83.61%, specificity=90.05%, positive predictive value=72.34%, and negative predictive value=94.04%). Its large-scale use would accelerate the identification of pregnant women with a high risk of dystocia. Their timely referral to specialized emergency obstetrics centers would increase the efficacy of care and reduce the levels of maternal mortality and stillbirth., (Copyright © 2013 Académie des sciences. Published by Elsevier SAS. All rights reserved.)
- Published
- 2013
- Full Text
- View/download PDF
43. [Analysis of free health care for the elderly in the context of the "Plan Sésame" in Senegal].
- Author
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Leye MM, Diongue M, Faye A, Coumé M, Faye A, Tall AB, Niang K, Wone I, Seck I, Ndiaye P, and Tal-Dia A
- Subjects
- Aged, Humans, Senegal, Health Services for the Aged, Uncompensated Care
- Abstract
Introduction: Access to health care remains a major problem in Senegal, particularly among vulnerable groups such as the elderly. In 2006, the Senegalese government introduced a national plan for the provision of free health care known as "Plan Sésame" to improve access to care. The purpose of this study was to examine the current state of the "Plan Sésame" in national hospitals four years after its implementation (2006-2009)., Methods: A qualitative study using individual interviews was conducted between 15 March and 14 May 2010 among five target populations: hospital directors, health care providers, managers of the "Plan Sésame" in hospital admission services, management accountants, and beneficiaries. Content analysis was used., Results: Between 2006 and 2008, hospital attendance rates increased every year. However, attendance rates began to decrease in 2009, except in the main hospital. The state has been left with a growing debt because of issues surrounding the reimbursement of expenses related to the "Plan Sésame'. As a result, national hospitals have been forced to restrict certain services included in the "Plan Sésame" and even to withdraw free health care for the elderly. These difficulties are likely to undermine the sustainability of the "Plan Sésame", Conclusion: The health authorities need to audit the "Plan Sésame:, to comply with standard procedures through regular monitoring and to redefine conditions of access.
- Published
- 2013
44. [Socio-demographic factors and the treatment of obstetric fistula in southeastern Senegal].
- Author
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Leye MM, Ndiaye P, Diongue M, Niang K, Badiane NA, Faye A, Seck I, Camara MD, and Tal-Dia A
- Subjects
- Female, Humans, Pregnancy, Prevalence, Risk Factors, Senegal, Surveys and Questionnaires, Family Characteristics, Fistula
- Abstract
The objective of this study was to examine the socio-demographic profile and
treatment of women suffering from obstetric fistula (OF) in southeastern Senegal. Conducted between August 2007 and January 2008, the study focused on women treated in regional hospitals in Tambacounda and Kolda. The data were collected using questionnaire-based interviews and analyzed using the Epi Info 3.3.1 software package. The patients (mean age of occurrence of OF: 24) were mostly from rural areas (86%), illiterate (89%), and excised (93%). The main cause of the condition cited by the participants was long working hours (42%). The study found that the participants were more likely to have no income-generating activity (84% compared to 22%) and to be divorced (19% compared to 2%) after (as opposed to before) the OF. The study also highlighted the prevalence of psychological disorders (62%), withdrawal (22%), abandonment by friends and/or family (16%) or by the husband (7%), and decreased effectiveness in household chores (4%). The average time between the occurrence of OF and the first consultation was 50.7 (± 55.3) months. The study found that 44% of the participants were waiting for an operation, 35% had undergone unsuccessful surgery, 14% had been treated and cured, 6% had recently undergone surgery, and 1% had suffered a recurrence. Good access to services was found to be necessary for effective treatment, although high-quality obstetric care and increased awareness were identified as the most important factors for the prevention of OF in southeastern Senegal. - Published
- 2012
45. [Measles epidemic and response in the region of Dakar (Senegal) in 2009].
- Author
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Seck I, Faye A, Mbacké Leye MM, Bathily A, Camara MD, Ndiaye P, and Dia AT
- Subjects
- Adolescent, Adult, Age Distribution, Child, Child, Preschool, Cross-Sectional Studies, Female, Humans, Infant, Male, Measles Vaccine administration & dosage, Senegal epidemiology, Sex Distribution, Vaccination statistics & numerical data, Young Adult, Disease Outbreaks, Measles epidemiology
- Abstract
In 2009, the region of Dakar (Senegal) experienced a major measles epidemic, in the context of the failure of the immunization program. The objective of this study was to examine the epidemic and the effectiveness of the response. A cross-sectional epidemiological study of all cases of measles confirmed by laboratory tests or epidemiological linkage was conducted between June and December 2009. The study also assessed the effectiveness of the response. The results show that out of 767 confirmed cases, less than a third (30 %) were laboratory-confirmed, while the remaining cases were confirmed by epidemiological linkage with one or several other confirmed cases. The minimum age was 4 months and the maximum age was 35 years. Children under 5 accounted for 67.4 % of the total number of cases. The male population was more affected than the female population (52.2 %). Most of the cases of were not vaccinated (88.5 %). The southern district had the highest incidence of measles, with more than 68 cases per 100,000 inhabitants. The vaccination coverage rate over the last 3 years was found to be satisfactory (average rate: 82.2 %). The response campaign resulted in the vaccination of 54,793 children aged 9 to 59 months (55.9%) distributed throughout the high-risk areas with low immunization coverage. No deaths were reported. The results suggest that it is important i) to continue to promote measles vaccination; ii) to combine routine vaccinations with supplements (for example vitamin A); iii) to introduce national vaccination campaigns targeting specific groups (new army recruits, students, refugees, etc.); and iv) to introduce a second dose of vaccine to ensure that the children who did not receive the first vaccine are covered and to address primary vaccine failures among those who were vaccinated.
- Published
- 2012
46. [Economic evaluation of rapid diagnostic tests in malaria treatment].
- Author
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Faye A, Ndiaye P, Diagne-Camara M, Badiane O, Wone I, Diongue M, Seck I, Dia AT, and Dia AL
- Subjects
- Adolescent, Adult, Artemisinins therapeutic use, Child, Child, Preschool, Cross-Sectional Studies, Drug Therapy, Combination, Female, Humans, Infant, Infant, Newborn, Malaria, Falciparum drug therapy, Male, Senegal, Young Adult, Malaria, Falciparum diagnosis, Reagent Kits, Diagnostic economics
- Abstract
This study aimed to evaluate the economic implications of rapid diagnostic tests (RDTs) on malaria management through the rational use of artemisinin-based combination therapy (ACT). The study was carried out in 2006 from November 10th to December 10th; it focused on patients who were seen and treated with ACT for suspicion of uncomplicated malaria in the health district of Ziguinchor, Senegal. The variables studied included age, sex, RDT results, and costs of care and RDT. The cost of care for malaria, estimated in CFA Francs, was evaluated both with and without the use of RDT. Among the 379 patients, 25,1% were aged 0-4 years, 12,7% of 5-14 years and 62,2% of at least 15 years; 51% were women. The result of the RDT was negative in 60% of cases. Without the use of diagnostic testing, the cost of care for all 379 cases was estimated at 299 957 CFA: patient contributions would cover 184 500 CFA and the State would cover the rest (115 457 CFA). With the use of RDTs, the overall cost of the RDT screening for 379 patients and the cost of treatment for the 150 positive cases amounted to 254 786 CFA, with patients bearing the cost of 205 550 CFA and the State subsidizing up to 49 236 CFA. RDT can help identify the positive cases of malaria, and avoid up to 60% of unnecessary treatments, corresponding to an estimated 27 297 cases at the district level and 584 630 cases nationally. The RDT also allow a more rational use of ACTs and a lower risk of emergence of Plasmodium resistance. The use of RDTs could result in savings of 45 171 CFA at the level of the district health centre and 111 240 136 CFA nationally.
- Published
- 2010
47. [Female genital mutilation and complications in childbirth in the province of Gourma (Burkina Faso)].
- Author
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Ndiaye P, Diongue M, Faye A, Ouedraogo D, and Tal Dia A
- Subjects
- Adolescent, Adult, Burkina Faso epidemiology, Cesarean Section statistics & numerical data, Cross-Sectional Studies, Female, Humans, Obstetric Labor Complications etiology, Pregnancy, Young Adult, Circumcision, Female adverse effects, Obstetric Labor Complications epidemiology
- Abstract
In order strengthen activities against female genital mutilation (FGM), this study aimed to assess the prevalence of childbirth complications due to FGM in the province of Gourma, Burkina Faso. The cross-sectional study was both descriptive and analytical; it was conducted between June 15 and August 15, 2007. The sampling was comprehensive, incorporating all of the women who gave birth in the four maternity wards in Fada Ngourma, the provincial capital. The survey included an interview, clinical examination and document analysis of archives and records. The 354 respondents were younger than 25 years-old in 58% of the cases, and 78% of all women participating were illiterate. FGM was Type I, II or III for 28%, 28% and 3% for them respectively. Obstructed labor occurred in 29% of the cases, and a caesarean section was preformed in 7% of the cases. Of all the normal vaginal deliveries, 24% required episiotomies, 18% experienced obstetric Hemorrhaging, 20% had uterine retroversion and 3% needed blood transfusions. Among the newborns, 5% were resuscitated and 4% were stillbirths. The existence of FGM has statistically increased the proportion of dystocia (OR = 11.5), cesarean section (OR = 17.6), episiotomy (OR = 64), perineal tears (OR = 10, 2), postpartum hemorrhage (OR = 13.0), retroverted uterus (OR = 14.7), blood transfusions (OR = 8.0) and stillbirths (OR = 10.2). Women with FGM Type 2 and 3 were more prone to dystocia and obstructed labor (OR = 5.7) and cesarean delivery (OR = 5.2) than those with FGM Type 1. FGM constitutes an important risk factor for complications during childbirth. It should be eradicated for good health of the mother, newborn and child in Burkina Faso.
- Published
- 2010
48. [Quality of water for household consumption: analysis and action plan in rural area of Senegal].
- Author
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Ndiaye P, Ba IO, Dieng M, Fall C, and Dia AT
- Subjects
- Adult, Aged, Aged, 80 and over, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Rural Health, Rural Population, Senegal, Water Microbiology, Young Adult, Sanitary Engineering, Water Supply
- Abstract
This study aimed to evaluate the supply and the conservation of water for household consumption, in order to propose solutions for its quality improvement. An inspection of the drilling tank was completed by a two-part process, first consisting of doing a bacteriological analysis of the tank's water, and second by conducting a survey of 216 household leaders and the 32 Rural Council members. The drilling tank was left uncovered in open air, and it was overrun with algae and other various objects. It did not have any chemical treatment device, and the distribution pipes lacked water tightness. Serratia marcescens and Streptococcus faecalis were found in the tank's water. The tank's lack of a cover and absence of chlorination treatment were ignored by 55% and 56% of the household's leaders respectively. The storage containers, in 88% of cases, were inappropriate. The water was not chlorinated for 53% of the households. Among the 32 Rural Council members, 26 suggested chlorination and 18 suggested covering the tank for the quality improvement of water drilled and stored in the tanks. As a next step towards the resolution of this problem, an action plan was established with a budget up to 664,000 CFA francs, coordinated by the head doctor of the health district. The community participation facilitated such a level of involvement that eventually a water tower was constructed in 2005, which was beneficial to the health of the entire population of Mbar.
- Published
- 2010
49. [Community participation for a latrine project in Senegalese rural area].
- Author
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Ndiaye P, Ndiaye NM, Diongue M, Faye A, and Dia AT
- Subjects
- Diarrhea epidemiology, Diarrhea prevention & control, Humans, Hygiene standards, Needs Assessment standards, Senegal epidemiology, Toilet Facilities standards, Community Health Planning organization & administration, Community Participation trends, Rural Health Services organization & administration, Toilet Facilities statistics & numerical data
- Abstract
The rural community of Ngohé faces serious hygiene and sanitation problems because of the poor quality of water, and in particular due to the lack of latrines in shelters. As of 2003, a three-year project for the construction of latrines was initiated within the framework of a donor agency programme to support the health region of Diourbel. After three years of activity, the poor results recorded provided considerable justification for the analysis of community participation in the project. A cross-cutting descriptive and analytical survey was carried out from December 14 -17th, 2005. Two trained investigators collected the data through individual and group interviews. It was found that there was close community participation in the decision-making process to determine which activities would be undertaken; however, it was limited in the areas of need assessment, mobilization and management of resources as well as monitoring and evaluation. Community participation was considered average concerning the implementation of activities. The low rate of latrines (1.7%), correlated with the high proportion of diarrhea as one of the main reason for consultation in 2004 (33.4%) and 2005 (29.4%), expressed the non-achievement of the project's objectives, which was planned to end in 2006. Many projects have shortcomings and pitfalls in their participatory strategy at al phases, especially during that of implementation. Frequently, participation efforts are limited to the recruitment of community participants. The organization and coordination that should accompany and support strategies for community participation must be adapted to the context of the poor and disadvantaged populations, a majority of whom are illiterate, as they are less sensitized to the benefits of hygiene and health promotion. It is the responsibility of health professionals to organize community representatives and to strengthen their capabilities in the field of hygiene and health in order to ensure the community ownership and sustainability of such projects.
- Published
- 2010
50. [Contribution of supplementation by spirulina to the performance of school children in an introductory course in Dakar (Senegal)].
- Author
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Dia AT, Camara MD, Ndiaye P, Faye A, Wone I, Gueye BC, Seck I, and Diongue M
- Subjects
- Child, Female, Humans, Male, Prospective Studies, Psychomotor Performance, Senegal, Dietary Supplements, Learning, Spirulina, Students
- Abstract
Senegal initiated a program to improve the nutritional status of school-age children with the use of spirulina. The objective of this study was to evaluate the effects of spirulina on academic performance of school children in the municipality of Dakar, Senegal. The evaluation was conducted as a prospective study, comparing school performance of schoolchildren from public elementary schools located in three National Education Departments of Dakar (before supplements, during and after). The study population consisted of students from six schools randomly selected among the 100 who were in the program. We included all children with agreement of their parent or guardian, and those who rejected the spirulina were not included. Supplemental feeding with spirulina was given to young children during two months (from mid-April to mid June 2005). Over these 60 days, the students took a daily dose of 2 grams of spirulina mixed with 10g of honey to make the taste acceptable. The data on age, gender and monitoring of school performance (i.e. the average compositions of the second and third quarters) were collected. Mean differences in grades between second quarter and third quarter (after two months of supplementation) were analyzed and compared by the paired student test. The sample size was a total of 549 schoolchildren: 273 (49.72%) were girls, and 276 (50.28%) boys. The mean age was 91 months [90.29-91.71]. The average of 2rd quarter marks before supplementation was 5.17 out of 10 IC = [4.99-5.35] and the same for the 3rd quarter after two months of supplementation was 5.78 out of 10 IC = [5.59-5.97]. The mean difference between pupils' marks at the 3rd and the 2nd trimester was 0.59 (p <-- 0.0001). After two months of supplemental feeding, the academic performance of the children was improved.
- Published
- 2009
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