Academic literature on the topic 'Mont Cameroun'

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Journal articles on the topic "Mont Cameroun"

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Ngounouno, Ismaïla, Bernard Déruelle, Raymond Montigny, and Daniel Demaiffe. "Les camptonites du mont Cameroun, Cameroun, Afrique." Comptes Rendus Geoscience 338, no. 8 (June 2006): 537–44. http://dx.doi.org/10.1016/j.crte.2006.03.015.

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Morin, Serge, Gérard Mottet, and Appolinaire Zogning. "Deux études sur le volcanisme du Mont Cameroun. (Two studies about Mount Cameroun)." Bulletin de l'Association de géographes français 62, no. 2 (1985): 135–44. http://dx.doi.org/10.3406/bagf.1985.1291.

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Smith, Thomas Bates, and Duncan Mcniven. "Preliminary survey of the avifauna of Mt Tchabal Mbabo, west-central Cameroon." Bird Conservation International 3, no. 1 (March 1993): 13–19. http://dx.doi.org/10.1017/s0959270900000757.

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SummaryThe montane forests of western Cameroon are well known for their endemic birds. The most northerly such forests probably occur on Mt Tchabal Mbabo, where a preliminary survey of the avifauna in 1990 found 12 montane species, of which six represented significant range extensions, among them the threatened Ploceus bannermani. Given the increasing human pressures on other montane forests in Cameroon, Mt Tchabal Mbabo may be attractive for future conservation because of its comparative lack of human disturbance. Densities of indigenous people are low and there is a lack of significant hunting and firewood-gathering, the precipitous nature of the northern slope makes human intrusions difficult, and the lack of human disturbance may mean that local animal populations are stable.Les forêts d'altitude de l'ouest du Cameroun sont bien connues pour leurs populations endémiques d'oiseaux. Les forêts les plus au nord sont celles du Mont Tchabal Mbabo, où un recensement préliminaire de la faune aviaire en 1990 a révélé 12 espèces, dont six avaient une aire de répartition relativement grande, y compris l'espèce menacée Ploceus bannermani. Etant donné l'accroissement des pressions humaines sur les autres forêts d'altitude au Cameroun, le Mont Tchabal Mbabo pourrait se réveler intéressant pour des programmes de conservation futurs, compte tenu d'une perturbation humaine relativement inexistante. Les densités de population indigène y sont faibles, et la chasse ainsi que le ramassage du bois pour les besoins domestiques ne sont pas significatifs. Les pentes abruptes du nord rendent difficile toute intrusion humaine, et l'absence de perturbations dues à l'homme pourrait signifier la stabilité des populations animales locales.
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Wete, E., J. L. Betti, J. R. Ngueguim, Siegfried D. Dibong, and N. O. F. Njukouyou. "Analyse comparative de la soutenabilité des méthodes d’exploitation de Prunus africana (Hook. f.) Kalkman en vigueur au Cameroun : incidence biologique et socio-économique." International Journal of Biological and Chemical Sciences 14, no. 4 (August 17, 2020): 1405–15. http://dx.doi.org/10.4314/ijbcs.v14i4.19.

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Prunus africana (Hook. f.) Kalkman est une plante de haute valeur médicinale qui connait de forte pression d’exploitation au Mont Cameroun. Dans le cadre d’une récolte durable des écorces, deux méthodes d’exploitation (2/4 et 4/8 opposées) ont été recommandées par l’Agence National de Développement des Forêts (ANAFOR) qui est l’autorité scientifique CITES du Cameroun. Cette étude porte sur l’analyse de la soutenabilité biologique et économique de ces méthodes de récolte en vigueur Cameroun. Un inventaire d’exploitation au taux de sondage de 100% dans une parcelle de 100 ha en fin de première rotation (cycle de 5 années), a servi à la collecte des données sur l’état de santé des arbres (mort, vivant, dépérissant), la mesure des diamètres à hauteur de poitrine et le dénombrement de la population d’arbre. Au total 170 arbres ont été dénombrés, ce qui correspond à 1,7 tiges/ha. Dans cet échantillon on compte 84 arbres (54%) exploités à la méthode 4/8. Ce groupe comprend 23 arbres dépérissant (27,40%), 7 arbres morts (8,30%) et 54 arbres vivants (64,30%). Tandis que sur un effectif de 86 arbres (56%) exploités par la méthode 2/4 on a observé 12 arbres dépérissant (14%), aucun arbre mort et 74 arbres vivants (86%). Ces informations montrent que la méthode d’écorçage (4/8) est plus compromettante sur la croissance des populations d’arbre. Elle est également économiquement la moins rentable avec des pertes de 1650 $US comparée à la méthode 2/4 (660 $). La méthode 2/4 a un faible impact sur la santé des arbres, elle peut être améliorée et adoptée comme méthode de récolte durable qui garantit une cicatrisation rapide de l’écorce des arbres et des revenues importants.Mots clés : Plante médicinale, méthode de récolte durable, régénération, aménagement des ressources forestières, Mont Cameroun. English Title: Comparative analysis of the sustainability of prunus africana (Hook. f.) Kalkman harvesting techniques used in Cameroon: biologic and socioeconomic incidence Prunus africana (Hook. f.) Kalkman is a medicinal plant with a high socioeconomic value which is facing serious bark harvesting pressure in Mount Cameroon. To ensure sustainable exploitation, two norms (2/4 and 4/8 opposites) was prescribed by the National Forestry Agency (ANAFOR) which is the CITES scientific authority in Cameroon. This study analyzes the biologic and economic sustainability of these harvesting practices. Data collection consisted of trees inventory, measurement of trees diameter and appreciation of tree vitality within a 100 ha plot at the end of the first rotation (five years later after bark harvesting). The sample comprise 170 trees (corresponding to 1.7 trees/ha) amongst which 84 trees (54%) were harvested using 4/8 technic. In this group, 23 (27.40%) trees were found in bad health, 7 (8.30%) trees dead, 54 trees alive (64.30%) and the annual diameter increment was 0.42±0.37 cm while in a group of 86 trees (56%) harvested with 2/4 technic, observation shown: 12 trees (14%) in bad health, 74 trees alive (86%) and annual diameter increment of 0.44±0.36 cm. This statistic shows that, 4/8 technic has a negative impact on trees population and is less benefit with losses estimated at 1650 $US comparing to 660 $US (2/4 technic). The 2/4 technic can be improved and adopted as a suitable harvesting method; since it ensures a fast diameter recovery, low impact on trees population and generate more income.Keywords: Medicinal plant, sustainable harvesting techniques, regeneration, forest resources management, Mount Cameroon.
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Sighomnov, Daniel, Sigha Nkamdjou, and Gregory Tanyileke. "Les fortes pluies de la région du mont Cameroun : le cas d'Idenau." La Météorologie 8, no. 2 (1993): 41. http://dx.doi.org/10.4267/2042/53551.

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Kagou Dongmo, Armand, Pierre Wandji, André Pouclet, Jean-Paul Vicat, Alain Cheilletz, David Guimolaire Nkouathio, Pavel Alexandrov, and Félix M. Tchoua. "Évolution volcanologique du mont Manengouba (Ligne du Cameroun) ; nouvelles données pétrographiques, géochimiques et géochronologiques." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 333, no. 3 (August 2001): 155–62. http://dx.doi.org/10.1016/s1251-8050(01)01625-1.

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Zogning, Appolinaire. "Limbe, une ville de piémont d'un volcan actif en milieu tropical humide : le Mont Cameroun." Revue de géographie alpine 82, no. 4 (1994): 71–86. http://dx.doi.org/10.3406/rga.1994.3774.

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Déruelle, Bernard, Jacques-Marie Bardintzeff, Jean-Louis Cheminée, Ismaïla Ngounouno, Justin Lissom, Charles Nkoumbou, Jacques Étamé, et al. "Éruptions simultanées de basalte alcalin et de hawaiite au mont Cameroun (28 mars–17 avril 1999)." Comptes Rendus de l'Académie des Sciences - Series IIA - Earth and Planetary Science 331, no. 8 (October 2000): 525–31. http://dx.doi.org/10.1016/s1251-8050(00)01454-3.

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Fosso, Jacob, Jean-Jacques Ménard, Jacques-Marie Bardintzeff, Pierre Wandji, Félix M. Tchoua, and Hervé Bellon. "Les laves du mont Bangou : une première manifestation volcanique éocène, à affinité transitionnelle, de la Ligne du Cameroun." Comptes Rendus Geoscience 337, no. 3 (February 2005): 315–25. http://dx.doi.org/10.1016/j.crte.2004.10.014.

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Solefack, Marie Caroline Momo, Olivier Chabrerie, Emilie Gallet-Moron, Bernard-Aloys Nkongmeneck, Olivier Noël Leumbe Leumbe, and Guillaume Decocq. "Analyse de la dynamique de déforestation par télédétection couplée aux modèles d’équations structurales: exemple de la forêt néphéliphile du mont Oku (Cameroun)." Acta Botanica Gallica 159, no. 4 (December 2012): 451–66. http://dx.doi.org/10.1080/12538078.2012.750583.

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Dissertations / Theses on the topic "Mont Cameroun"

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Lemoigne, Nicolas. "Mémoire des hommes, mémoire des sols : étude ethno-pédologique des usages paysans du Mont Cameroun." Bordeaux 3, 2010. https://tel.archives-ouvertes.fr/tel-00466511.

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Résumé : La fertilité des sols du volcan Mont Cameroun attire depuis des siècles une mosaïque de populations en cohabitation parfois difficile, dans un contexte de brassage culturel intense. Officiant comme autant d’archives vivantes des soubresauts de l’histoire, la mémoire pédologique enregistre et restitue la marque des usages, et par-là même celle des épisodes tragiques de l’occupation humaine. En retour, la mémoire sociale se fait l’écho des particularités du milieu, s’approprie ses originalités et adapte un système de représentations et de pratiques agraires diversifiées. Ces dernières sont commandées par la survie du groupe lorsqu’il s’agit des communautés paysannes mais aussi par les motivations financières de structures productivistes aux dimensions internationales. Les décennies passées, particulièrement riches en mutations sociales, ont donné lieu à une accélération de la chronologie événementielle dont les répercutions à l’échelle du sol sont lisibles. L’analogie de fonctionnement des mémoires sociale et pédologique, tant par leur similitude structurale que par le jeu de leurs interactions permanentes, constitue les fondements de ce travail. L’étude de certains indicateurs mémoriels permet de connaître de manière précise l’état de santé des sols comme celui des sociétés qui en vivent. Cette thèse contribue, à travers la mise en place d’une démarche pluridisciplinaire alliant l’ethnologie et la pédologie, à identifier les mécanismes de l’interaction entre les mémoires sociale et pédologique du Mont Cameroun
Abstract: Soil fertility of Mount Cameroon volcano has been attracting, for centuries, a mosaic of populations in sometimes delicate cohabitation, in a context of intense cultural melting pot. Acting as living archives of history jolts, the pedological memory records and restores the brand of uses, and by there the brand of tragic episodes of human occupation. In return, the social memory highlights the peculiarities of the environment, appropriates its originalities and adapts a system of representations and diversified agrarian practices: commanded by the survival of the group when it is about peasant communities but also by the financial motivations of industrial plantations of international dimensions. The last decades, particularly rich in social transformations, gave place to an acceleration of the events chronology which repercussions at soil scale are readable. The analogy of functioning of the social and pedological memories, both by their structural resemblance and by their permanent interactions, constitutes the foundations of this work. The study of some memory indicators allows us to know, in an accurate way, the health of soils as that of the societies which live from them. This thesis contributes, through the implementation of a multidisciplinary approach allying ethnology and pedology, to identify the mechanisms of the interaction between the social and pedological memory of Mount Cameroon
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Nkoumbou, Charles. "I. Étude géologique des Monts Roumpi : un ensemble plutonique et volcanique de la "Ligne du Cameroun"II. Données pétrologiques sur les néphélinites du Mont Etinde (Cameroun)." Nancy 1, 1990. http://docnum.univ-lorraine.fr/public/SCD_T_1990_0460_NKOUMBOU.pdf.

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Les monts Rumpi (sud-ouest Cameroun) sont constitués de roches plutoniques et volcaniques qui regroupent et reposent sur un substratum métamorphique et granitique. La géochronologie potassium-argon a été réalisée sur toutes les séries de roches. La série plutonique alcaline et ultime (gabbros-diorites-syénites) s'est différenciée par cristallisation fractionnée. La stratigraphie montre deux séries volcaniques allant des laves basiques alcalines aux laves felsiques hyperalcalines puis aux laves felsiques à kaersitite. La minéralogie, la géochimie et les équations de balance de masse indiquent une différenciation par cristallisation fractionnée. La source mantellique était enrichie en terres rares légères. Le montetinde a été cartographié et daté. Les caractéristiques pétrographiques, minéralogiques et géochimiques de ces laves nephelinitiques montrent qu'elles appartiennent à deux séries ou la cristallisation fractionnée a été, sporadiquement, perturbée par des réactions minéral-liquide et par des transferts d'éléments par des fluides. La source mantellique, chimiquement hétérogène, était enrichie en terres légères et était localisée en grande profondeur.
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Bulourde, Marc. "Processus d'altération des basaltes du Mont Cameroun : approche géochimique." Phd thesis, Université Rennes 1, 2001. http://tel.archives-ouvertes.fr/tel-00619383.

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Le Mont Cameroun est un volcan actif situé en bordure du continent africain. Le climat tropical humide régnant sur ses flancs crée des conditions privilégiées pour l'étude des processus d'altération des basaltes. L'altération chimique a_ d'abord été examinée dans des coulées massives (d'âge < 100 ans) puis dans des sols formés à partir de dépôts pyroclastiques récents (810 - 4530 ans). Les coulées massives ne montrent pas de transformations chimiques notables liées à l'altération, ainsi qu'en témoignent les concentrations en éléments majeurs et traces et les isotopes du Sr, Nd, Pb et' U. Toutefois, deux processus associés à l'interaction eau/roche se produisent à la surface des coulées: (1) un échange de cations entre les ions Na+ de la lave et les ions H+ des eaux d'altération et (2) une oxydation partielle du . Fe2+ en Fe3+. Ces modifications chimiques restent très limitées au regard des précipitations dans la zone d'étude (2"à 12 m/an). Nos résultats démontrent que les effets de l'altération sont négligeables sur la composition chimique de laves basaltiques massives soumises à des conditions tropicales humides sur une période de 100 ans. Plus perméables, les sols formés à partir de dépôts pyroclastiques constituent un matériel plus réactif vis-à-vis des solutions d'altération. Ces sols sont significativement enrichis en Cs, Ba, Pb, U, Th, P et appauvris en Na, K, Rb, Mg, Ca, Sr, Ni, Co et Si. Les enrichissements élémentaires, ainsi que les variations isotopiques du Sr, Nd et Pb dans les horizons superficiels, s'expliquent par l'adjonction périodique de poussières sahariennes. Nous montrons que la proportion massique d'aérosols sahariens dans les sols n'excède pas 7%. Les appauvrissements élémentaires résultent de l'hydrolyse des minéraux magmatiques. L'intensité de l'altération ne dépend pas de l'âge des dépôts pyroclastiques mais du temps pendant lequel ils . restent en surface avant d'être recouverts par des laves plus récentes et des conditions paléoclimatiques.
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Bulourde, Marc. "Processus d'altération des basaltes du Mont Cameroun : approche géochimique /." Rennes : Université de Rennes I, Géosciences, 2001. http://catalogue.bnf.fr/ark:/12148/cb389404259.

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Momo, Solefack Marie Caroline. "Influence des activités anthropiques sur la végétation du Mont Oku (Cameroun)." Amiens, 2009. http://www.theses.fr/2009AMIED013.

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Le mont Oku au nord-ouest du Cameroun comporte l’un des plus vastes vestiges de forêt d’altitude d'Afrique centrale et fait partie de l’un des « points chauds » de biodiversité de la planète, aujourd’hui menacé de disparition. L’objectif de cette étude est de quantifier les changements d’occupation du sol sur le mont Oku au cours des quatre dernières décennies et de décrire les variations de composition et de richesse spécifique végétales le long d’un gradient altitudinal, puis de lier ces variations aux paramètres environnementaux. Pour cela, nous avons comparé les occupations du sol estimées par les images satellites Landsat de 1978, 1988 et 2001. Puis cent deux relevés floristiques ont été disposés aléatoirement dans différentes formations végétales forestières accessibles le long d’un gradient altitudinal s’étalant de 1 800 m à 2749 m. Il ressort de ces études que, malgré la protection naturelle qu’offrent l’altitude et la pente, le couvert forestier n’a cessé de décroître, perdant 62,1% de sa surface entre 1978 et 2001, ce qui correspond à un déboisement de 579 ha. An-1 en moyenne. Les surfaces déboisées ont été continuellement remplacées par des cultures ou des savanes, sans qu’il y ait recolonisation par des forêts secondaires. Notre étude montre également qu’il est difficile de démêler les effets de l’altitude et des activités humaines sur la végétation, parce que ces deux facteurs sont inextricablement liés et forment un seul gradient à effets antagonistes à ses extrémités. Les activités humaines déstructurent les communautés végétales, majoritairement secondaires sur le site. Même les forêts les plus anciennes contiennent des espèces indicatrices de la présence humaine (liée au pâturage, aux feux ou aux cultures passées). Certains assemblages d’espèces pionnières sont floristiquement très hétérogènes et leur distribution altitudinale s’est élargie
Mount Oku, situated in north-west Cameroon, supports the largest remnants of the Central African montane forest habitat, which is considered as a biodiversity hotspot, hence is undergoing strong species loss. Our objective was to quantify changes in the land cover of Mount Oku over the last four decades, in order to assess the causes of forest regression and to evaluate the future of the forest on this site. We also describe a variation in plant species composition and richness along an altitudinal gradient, that were subsequently linked to environmental changes. For this purpose, we compared changes in land cover, using Landsat satellite images acquired in 1978, 1988 and 2001. Then 102 sample plots were randomly set up in forest fragments along an altitudinal gradient ranging from 1800 m to 2749 m. Although remnant forests were naturally protected by elevation and slope, they lost 62. 1% of their area between 1978 and 2001, corresponding to a mean deforestation rate of 579 ha. Year-1. Deforested lands have been replaced by crops or savanna, while few secondary forest recolonizations occurred. New farmland has extended rapidly to fulfill the demands of an increasing population density. Our study also revealed that it is difficult to disentangle the effects of altitude and human activities on vegetation because these two factors are inextricably linked and form a single gradient with antagonistic effects at the extremes. Human activities and natural vegetation belts were organized with respect to the altitudinal gradient: the summit of Mount Oku supported the largest, oldest forest fragments; while areas of low altitude have experienced intense deforestation to provide agricultural land and supported disturbance-related plant communities. However, human activities altered plant assemblages. Even old-growth forests contained species indicative of human presence (due to grazing, fire or former cultivation). Some pioneer species assemblages were very heterogeneous and their altitudinal distribution has spread
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Lemoigne, Nicolas. "Mémoire des hommes, mémoire des sols. Etude ethno-pédologique des usages paysans du Mont Cameroun." Phd thesis, Université Michel de Montaigne - Bordeaux III, 2010. http://tel.archives-ouvertes.fr/tel-00466511.

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La fertilité des sols du volcan Mont Cameroun attire depuis des siècles une mosaïque de populations en cohabitation parfois difficile, dans un contexte de brassage culturel intense. Officiant comme autant d'archives vivantes des soubresauts de l'histoire, la mémoire pédologique enregistre et restitue la marque des usages, et par-là même celle des épisodes tragiques de l'occupation humaine. En retour, la mémoire sociale se fait l'écho des particularités du milieu, s'approprie ses originalités et adapte un système de représentations et de pratiques agraires diversifiées. Ces dernières sont commandées par la survie du groupe lorsqu'il s'agit des communautés paysannes mais aussi par les motivations financières de structures productivistes aux dimensions internationales. Les décennies passées, particulièrement riches en mutations sociales, ont donné lieu à une accélération de la chronologie événementielle dont les répercutions à l'échelle du sol sont lisibles. L'analogie de fonctionnement des mémoires sociale et pédologique, tant par leur similitude structurale que par le jeu de leurs interactions permanentes, constitue les fondements de ce travail. L'étude de certains indicateurs mémoriels permet de connaître de manière précise l'état de santé des sols comme celui des sociétés qui en vivent. Cette thèse contribue, à travers la mise en place d'une démarche pluridisciplinaire alliant l'ethnologie et la pédologie, à identifier les mécanismes de l'interaction entre les mémoires sociale et pédologique du Mont Cameroun.
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Bindzi, Tsala Joseph. "Alteration et evolution des sols sur materiaux volcaniques de la region orientale du mont cameroun." Paris 6, 1992. http://www.theses.fr/1992PA066417.

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Cette etude traite essentiellement la genese et l'evolution d'une formation volcanique meuble du pied du massif du mont cameroun a bolifamba. Les caracteristiques principales de cette formation pedologique sont: (1) un degre moyen de differenciation et d'evolution en un sol brun sur depots volcaniques holocenes ; (2) un horizon c, ensemble argilo-limoneux ou limono-argileux a structure et texture de sol meuble associe au materiau a structure de la roche ; (3) un horizon b ou (b), ensemble argilo-limoneux a argileux intermediaire a structure et texture de sol, pouvant etre absent ; (4) un horizon a ou ap, ensemble argilo-limoneux superieur a texture de sol, uniquement constitue de materiaux non indures. Les horizons ainsi identifies montrent des microstructures caracteristiques des alterations du basalte pour horizons c et pour horizons sus-jacents b ou (b) et a, des microstructures de type polyedrique anguleux a subanguleux avec des agregats grossiers, moyens et fins et de type grumeleux avec des agregats jointifs, en grappe, a distribution aleatoire. La presence d'oxydes de fer et/ou de manganese dans ces trois ensembles donne une coloration ocre a brun orange dans l'ensemble inferieur (horizon c), jaune brun dans l'ensemble median b ou (b) et brun jaune, brun rouge ou jaune orange dans l'ensemble superieur (horizon ap). L'horizon ap, subdivise en ap1 et ap2, est un horizon qui resulte des processus d'alteration des basaltes plagioclases-olivine sous les conditions de bolifamba avec neoformation des argiles mineralogiques de reseau 1: 1, kaolinite essentiellement et individualisation des sesquioxydes cristallins de fer, titane et manganese. Il s'agit du processus d'alteration ferrallitique ou l'elimination des bases est plus ou moins totale. A un stade plus avance, les processus de reorganisation et du mouvement des argiles et du fer parviennent a leur maximum d'expression donnant naissance aux horizons b. Dans ces horizons, les argiles mineralogiques sont composees essentiellement de kaolinite et d'interstratifies constitues de vermiculite et de smectite. Il y a formation de quelques nodules de fer. Les argiles mineralogiques de l'horizon c sont: (1) la kaolinite dominante ; (2) la vermiculite
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Riotte, Jean. "Etude du déséquilibre 234U-238U dans les eaux de rivière : cas du Strengbach, du mont Cameroun et de l'Himalaya." Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13094.

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Talla, Tankam Narcisse. "Une nouvelle approche d'analyse automatique de texture d'images : application à l'étude de la dynamique d'occupation spatiale sur le Mont Cameroun." Dijon, 2009. http://www.theses.fr/2009DIJOS017.

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L’objectif de cette thèse est de développer une technique nouvelle de classification d’images qui soit mieux adaptée au traitement d’images complexes de grandes tailles, notamment les images satellitaires radar, par rapport aux méthodes antérieures à nos travaux. Dans une première partie, nous proposons une approche de calcul des paramètres de texture qui est environ (Ng+1)n-1 fois plus rapide que l’approche par matrice de cooccurrence, où n est l’ordre du paramètre de texture et Ng le niveau de gris maximal dans l’image. Le modèle ainsi obtenu permet également d’obtenir un gain d’environ (Ng+1)n octets d’espace mémoire. Dans une seconde partie, nous proposons une nouvelle approche de classification supervisée d’images qui utilise les paramètres statistiques d’analyse de texture. Cette approche combine divers ordres de paramètres de texture, conservant ainsi un maximum d’informations. Elle nous a permis d’obtenir une amélioration de la qualité de la classification, atteignant pour certaines images un taux de classification de plus de 99 %. Cette évaluation a été conduite pour classifier deux images RSO acquises respectivement sur la côte atlantique du Cameroun et sur la mangrove littorale camerounaise. Une troisième partie est consacrée à l’étude de la dynamique d’évolution de l’état d’occupation des sols dans la région du mont Cameroun à l’aide de notre approche de classification développée
The main objective of this thesis is to develop a new image processing technique that could better be adapted to the processing of large and complex images, especially SAR images, in relation to the former methods of our works. On the one hand, we propose a new approach of textural parameters evaluation which is about (Ng+1)n-1 times faster than the co-occurrence matrix approach, where n is the order of the textural parameter and Ng being the maximum grey level in the image. The resulted model enables us a gain of about (Ng+1)n octets of memory space. On the second hand, we propose a new approach in image classification, based on the analysis of statistical textural parameters. This approach combines various orders of textural parameters that consequently conserve most of the information. It enabled us to obtain an enhancement in the quality of classification reaching for some images a classification precision of more than 99%. This evaluation was conducted in order to classify two SAR images covering the Atlantic coast of Cameroon and the Cameroon littoral mangrove respectively. A third part is focused on the study of the dynamic state of soil occupation in the Mount Cameroon region, using the proposed approach
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Ambella, Isidore. "La Mort chez les Mvelé du Cameroun." Lille 3 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37595434p.

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Books on the topic "Mont Cameroun"

1

Le Mont Cameroun: Contribution à l'étude du versant wouri. Paris: Editions Karthala, 1999.

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Bieller, Cesare. Una Cameron: La scozzese del Monte Bianco = l'écossaise du Mont-Blanc = the Scot of Mont Blanc. Quart [Italy]: Musumeci, 2002.

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Abossolo, Evina. Cameroun/Gabon: Le D.A.S.S. monte à l'attaque. [Paris]: L'Harmattan, 1985.

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Hallaire, Antoinette. Paysans montagnards du Nord-Cameroun: Les monts Mandara. Paris: ORSTOM, 1991.

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Musée Monastère bénédictin Mont Fébé (Yaoundé, Cameroon). Guide de l'art camerounais du Musée Monastère bénédictin Mont Fébé, Yaoundé: Une visite guidée en compagnie du père Omer Bauer. Yaoundé, Cameroun: Les Bénédictins du Monastère Mont Fébé, 1989.

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Nkoumou, Hubert. Vision du monde et pratiques culturelles des peuples animistes des monts-mandara dans l'extrême-nord du Cameroun. [Yaoundé]: ACAPLA, 2010.

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Day, Walter. Twin Galaxies' Official Video Game & Pinball Book Of World Records; Second Edition, Arcade Volume. Edited by Walter Day and Mr Kelly R. Flewin. Fairfield, IA: 1st World Publishing, 2007.

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Jacques, Fédry, and Catholic Church. Diocese of Maroua-Mokolo., eds. Dieu seul!: Le Dieu du ciel chez les montagnards du nord des Monts Mandara : session de Maroua, 6-7-8 juillet 2007 (Nord-Cameroun). Yaoundé: Diocèse de Maroua-Mokolo, 2008.

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Guide de l'art Camerounais du Muse e Monaste re be ne dictin Mont Fe be Yaounde =: Guidebook to the art of Cameroon in the Mt. Febe Benedictine Monastery Museum, Yaounde. Yaounde: Monaste re Be ne dictin du Mont Fe be , Muse e d'Art Camerounais, 1989.

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Krishnasamy, Devamany S., and Asan Ali Golam Hassan. Masyarakat Orang Asli: Impak program penempatan semula. UUM Press, 2016. http://dx.doi.org/10.32890/9789670876719.

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Orang Asli merupakan kaum minoriti yang peratusannya kurang daripada satu peratus daripada jumlah penduduk Malaysia. Di Malaysia tumpuan dasar pembangunan Orang Asli telah dilaksanakan sejak 1954 melalui Akta Orang Asli (Akta 134) dan penubuhan Jabatan Orang Asli (JOA). Walau bagaimanapun, sehingga kini, masyarakat Orang Asli masih kekal sebagai satu kelompok kecil golongan minoriti yang terpinggir daripada teras pembangunan nasional. Mereka masih digolongkan sebagai the most marginalized sector of society.Salah satu strategi kerajaan untuk meningkatkan kualiti kehidupan masyarakat Orang Asli adalah melalui Rancangan Penempatan Semula (RPS) dan Program Penyusunan Semula Kampung (PPK).RPS melibatkan perpindahan masyarakat Orang Asli yang jauh berselerak ke dalam satu kawasan yang dilengkapi dengan kemudahan asas dan aktiviti ekonomi untuk pertanian komersial.PPK pula tidak melibatkan perpindahan penduduk, tetapi kawasan penempatan mereka disusun semula dari segi kemudahan rumah dan komponen infrasosial yang lain.Buku ini membincangkan impak program penempatan semula ke atas petunjuk sosioekonomi masyarakat Orang Asli di kawasan RPS dan PPK. Hasil penulisan buku ini berdasarkan kajian etnografi dan temu bual dengan 1,235 keluarga yang melibatkan 69 buah kampung dalam Parlimen Cameron Highlands, Pahang.
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Book chapters on the topic "Mont Cameroun"

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Abou, Salé, Madi Ali, Anselme Wakponou, and Armel Sambo. "Sorghum Farmers’ Climate Change Adaptation Strategies in the Semiarid Region of Cameroon." In African Handbook of Climate Change Adaptation, 147–65. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_41.

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AbstractThis chapter deals with the problem of sorghum farmers’ adaptation to climate change in the semiarid region of Cameroon. Its general objective is to compare the various adaptation strategies’ typologies and to characterize the sorghum farmers’ adaptation strategies on the basis of the suitable one. The stratified random sampling method was used to select the sites, which consist of twenty (20) villages, and the sample, which consists of six hundred (600) farm household heads. After conducting focus-groups in ten villages and interviews with resource persons, the primary data were collected using a semi-open survey questionnaire. It appears that the poor spatiotemporal distribution of rains and the drought constitute, respectively, the main climate hazard and the main water risk that farmers are dealing with; the farmers are vulnerable to climate change because the adaptation strategies used are mostly traditional, their adoption rates are very low, and the use of efficient adaptation strategies (irrigation, improved crop varieties) is almost unknown. The characterization of the adaptation strategies used shows that they are more complex than most authors who have established the typologies thought. It comes out that improving the resilience of these sorghum farmers absolutely requires the improvement of their basic socioeconomic conditions.
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Balogun, R. Ayodeji, E. Adesanya Adefisan, Z. Debo Adeyewa, and E. Chilekwu Okogbue. "Thermodynamic Environment During the 2009 Burkina Faso and 2012 Nigeria Flood Disasters: Case Study." In African Handbook of Climate Change Adaptation, 1705–20. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_143.

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AbstractCritical or extreme atmospheric conditions which could result in flood disasters are important output for numerical weather forecast. This research applied thermodynamic variables to investigate the environment of two flood scenarios in West Africa as captured by the Tropical Rainfall Measurement Mission (TRMM) satellite. Results from the two case studies of flood events, in (i) Burkina Faso and (ii) Nigeria savannah, investigated in this research work, indicated that the September 1st 2009 flood, which was as a result of a single volumetric rainfall event of 408,070.60 ((mm/h)*km2) with 65% convective region in Burkina Faso, was initiated by interactions between extremely large lower tropospheric wind shear and cold pool dynamics. The case of the Nigeria savannah floods between July and September, 2012, was triggered by both continuous rainfall and release of water from the lagdo dam in Cameroon, which affected most of the communities in the river Benue axis. The continuous rainfalls were found to be as a result of extremely high convergence of moisture in the river Benue axis at different locations and periods. One of such rainfall events, as captured by TRMM satellite during September 29, 2012 in the Nigeria rainforest zone, indicated that the volumetric rainfall is 351,310.9 ((mm/h)*km2) with only 34% convective portion. From these results, it can be deduced that a combination of thermodynamic environmental variables, volume rainfall, and other satellite-derived convective parameters could provide important information for flood forecasting.
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Garakcheme, Gigla. "Chapitre 3. La toponymie dans les monts Mandara (Nord‑Cameroun)." In Conflits et violences dans le bassin du lac Tchad, 77–90. IRD Éditions, 2020. http://dx.doi.org/10.4000/books.irdeditions.38297.

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"Building Construction Practices in Developing Countries." In Decision Support for Construction Cost Control in Developing Countries, 6–27. IGI Global, 2016. http://dx.doi.org/10.4018/978-1-4666-9873-4.ch002.

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In this chapter, an overview of construction practices in developing countries will be examined. Although, practices from developing countries will be covered, the focus will be on Cameroon. The chapter commences with an overall background where challenges facing construction practices are discussed. Then an overview of the geography of Cameroon is presented. The two main sectors, the formal and informal where construction flourishes are discussed. The major risk factors and challenges related to materials, man-power and site management are also examined. Towards the end of the chapter the growing recognition of the informal sector is acknowledged as the future trends in most developing countries.
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Anselme, Wakponou, Monique Mainguet, and Frédéric Dumay. "Les techniques de cultures en terrasse dans les monts Mandara, Extrême Nord Cameroun." In Lutte antiérosive. IRD Éditions, 2012. http://dx.doi.org/10.4000/books.irdeditions.12842.

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Stoeffler, Quentin, Pierre Nguetse-Tegoum, and Bradford Mills. "Generating a System for Targeting Unconditional Cash Transfers in Cameroon." In Safety Nets in Africa: Effective Mechanisms to Reach the Poor and Most Vulnerable, 39–66. The World Bank, 2015. http://dx.doi.org/10.1596/978-1-4648-0435-9_ch3.

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Colby, Jason M. "The Legend of Mike Bigg." In Orca. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190673093.003.0019.

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The crew wasn’t looking forward to this. It was the chilly morning of October 26, 1973, and a southeastern swell had been rolling into Pedder Bay for hours. But Sealand’s twenty-man team was more worried about the task of restraining Taku. The bull killer whale was enormous—at least twenty-two feet long—and although he seemed friendly, no one knew how he would react. Most of the men smoked nervously as they watched the black dorsal fin circle the pen. As the water calmed, Bill Cameron exited the galley of the Western Spray and lowered himself onto one of the logs bordering the pen. Bob Wright had hired the Pender Harbour fisherman to help handle the whales. Although a large man, Cameron had a gentle way about him. “You just have to treat them like herring,” he instructed. “You can’t spook them.” At his order, the men aboard three small skiffs slowly began to pull up the net. Taku didn’t like it. As his enclosure shrank, the orca squealed, slapping his pectoral fins on the water. In a nearby pen, another captured whale, Kandy, listened intently. “Dry him up!” yelled Cameron, and the crew pulled harder, drawing the mesh underneath the big orca. As his man-made pond vanished, Taku flopped onto his side, his upturned eye frantic with fear. To the relief of everyone, he didn’t lash out, and divers tilted him upright for an explosive breath. “I had a hunch he’d be that easy,” said Cameron. “It’s the females that are the tough ones.” But the hard part was yet to come. With the big whale secured, federal researcher Michael Bigg stepped away from a group of scientists gathered on deck. In his hands, he held a radio pack, which he had designed using Sealand’s captive orca Haida as a model. He planned to mount it on Taku in the first ever attempt to radio-tag a killer whale for release.
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Winnicott, Donald W. "Letter to Sir David K. Henderson." In The Collected Works of D. W. Winnicott, 237–40. Oxford University Press, 2016. http://dx.doi.org/10.1093/med:psych/9780190271367.003.0048.

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In this letter, Winnicott extends the discussion of the question of lay analysts and suitable cases, agrees on the importance of analysts considering the environment in emotional development, and reiterates that the most advanced work on this area in children has been done in Great Britain. Mildred Creak and Kenneth Cameron are mentioned as important child psychiatrists.
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Endong, Floribert Patrick C. "Cultural Heritage Preservation in a Modernizing Africa." In Conservation, Restoration, and Analysis of Architectural and Archaeological Heritage, 28–47. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7555-9.ch002.

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Cultural heritage preservation is a sine qua non for the effective technological, scientific, and economic development of nations across the world. This follows the theory stating that culture is life and that there is a cultural factor in technological development. In view of this truism, most African states and social institutions have these last years embarked on multifaceted tactics aimed at heritage conservation in their respective national territories. These preservation efforts have yielded only patchy fruits as they are confronted to the forces of modernism and globalization. Thus, modernism and globalization have continued to represent big threats to heritage preservation in many African countries. This chapter illustrates this thesis through a comparative study of cultural heritage management in Cameroon and Nigeria. The chapter begins by examining the extent to which heritage preservation is feasible in an era governed by modernism and globalization before exploring similarities and differences in the ways modernism and globalization affect heritage preservation in Nigeria and Cameroon.
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Endong, Floribert Patrick C. "Prospects and Challenges of E-Government in Black Africa." In African Studies, 662–77. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-3019-1.ch035.

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Most scholars' perspectives on e-government development in Africa have tended to be monolithic. This has been irrespective of the fact that African nations have been adopting relatively different approaches to e-governance. Though the dominant tendency among them has been to struggle to have a certain amount of web presence through the creation of e-government web portals, each African country has designed its own (customized) e-government initiatives. It will therefore be very interesting to explore the extent to which the prospects and challenges of e-governance in Africa have been varying across countries. This chapter attempts to fill this gap in knowledge through a comparative study of e-government implementation in Nigeria and Cameroon. The chapter is divided into three main parts. The first part provides a conceptual definition and a brief history of e-government. The second part explores the phenomena of ICTs and e-governance in Africa while the last part provides a comparative perspective on the implementation of e-government in Nigeria and Cameroon.
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Conference papers on the topic "Mont Cameroun"

1

Akonwi Nebasifu, Ayonghe. "Community-assessment on Participatory Conservation of Mount Cameroon National Park." In 5th European Congress of Conservation Biology. Jyväskylä: Jyvaskyla University Open Science Centre, 2018. http://dx.doi.org/10.17011/conference/eccb2018/108677.

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Billong IV, Samuel Ismael, Bernabé Batchakui, René Simo Nono, and Georges Kouamou. "A pedagogic approach by contextual immersion." In Sixth International Conference on Higher Education Advances. Valencia: Universitat Politècnica de València, 2020. http://dx.doi.org/10.4995/head20.2020.11226.

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In several training institutions in sub-Saharan Africa today, the competency-based approach to teaching (CBA) has been adopted at the secondary school level. In Cameroon, based on our experience in teaching, we have found that this approach does not suit all categories of learners, generally the youngest. With the advent of Information and Communication Technologies (ICT), learners spend most of their time on ICT’s gadgets (mobile phone, tablet, etc ...). In this paper, we propose a complement to the CBA approach through pedagogic differentiation. This differentiation takes into account the learner's environment and adds a playful and captivating aspect to the techno-pedagogic tools to be made available to them through the gadgets they use. We call this approach contextual immersion. It starts from real life situation familiar to the learner. The tool made available to the learner, which integrates this approach, guides him/her progressively towards the solution to the problem posed and a generalization that summarizes the course that will be transmitted.
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Njome, M. S., C. E. Suh, and M. J. de Wit. "The Mount Cameroon Volcano, West Africa: an Active Link Between Recent Eruptives and Mantle Signatures of the Deep Past Beneath the Margins of Africa." In 11th SAGA Biennial Technical Meeting and Exhibition. European Association of Geoscientists & Engineers, 2009. http://dx.doi.org/10.3997/2214-4609-pdb.241.njome_paper.

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Altayeb, Khalid O., Su Yushan, Wu Shixiang, and Chen Zhankun. "Regional Geological Study and Potential Prediction of the Rio Del Rey Basin (RDR), Offshore Cameroon." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2571282-ms.

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ABSTRACT Located in the eastern end of Niger delta; the Rio Del Rey (RDR) basin has a unique, complex multi-staged geological features and different types of Structures. This study has aimed to better understand the different structural and stratigraphic setting of the fields within the RDR basin and the way they control the hydrocarbon occurrences. To do that, an integrated 2D and 3D seismic interpretation was done targeting the toe thrust boundary, the upper Cretaceous unconformity and four key horizons of different depth levels in the Tertiary formations. Twelve regional profiles of contrastive orientations that cover the whole basin were interpreted to identify the regional structures; well correlation was done to identify the shallower tertiary settings while additional detailed grids of interpretation at the northeastern and southwestern corners and the seismic facies analysis of the whole RDR study area were used to classify the stratigraphic setting at the deeper regions. The results have revealed that the RDR basin is mainly controlled by thrusting, diapirism and detachment fault structures. The major toe thrust zone is found southern of Ngosso and trends in the northeast-southwestern direction. Gravitational tectonism becomes the primary deformation process shaping the structures as the sediments accumulation increases to the south and consequently, several shale ridges were formed. These ridges and their lateral movement from North to South along with the whole sediments increasing have caused a slope instability of the lower ductile Akata shale formation; what caused the forming of the detachment faults zone in the Northern and middle parts of the RDR basin. The Oongue Turbidites of Eocene were deposited in the northeastern part of the basin in deep water fans by the main sediments supply from the North and the East with various sand thicknesses due to the structural system. The hydrocarbon potential accumulations are found in the mid to upper Tertiary formations and the deeper Upper Cretaceous, but most of the oil and gas fields are located in shallower deltaic reservoirs associated with fault-bounded traps related to shale ridges and diapir structures. Considerable amounts of hydrocarbons were also found within the turbidites sands of Oongue (NE) and Isongo (SE).
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Grigoriev, Mikhail, Travis Carrigan, David Garlisch, and James Hitt. "Higher Order Finite Element Meshes for Centrifugal Impeller Blade Analyses Using Pointwise." In ASME Turbo Expo 2014: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/gt2014-25734.

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Finite Element Methods (FEM) have become a key tool to predict stresses, deformations, eigenfrequencies and eigenmodes in centrifugal impellers under centrifugal loads. Accurate prediction of values of principal stresses and natural frequencies is critical to avoiding field failures of impellers. Accurate prediction of maximum principal stresses in centrifugal impeller blades is a straightforward task using linear finite elements with a moderate mesh resolution. Centrifugal impeller failures due to high stresses have been virtually eliminated as a failure mode because of this level of analysis. However, the same level of analysis of natural frequencies does not always result in accurate predictions of higher frequency modes. It has been Cameron’s experience that the most common reason for impeller field failure has been a high frequency resonance resulting in a high cycle fatigue failure. Although there are a few commercially available tools for stress and modal analyses of centrifugal impellers, we are not aware of any that offers the flexibility, generality and, most importantly, accuracy in predicting high modal frequencies. The impeller designer has to find a solution that allows the impeller to survive with the exciters caused by diffuser vane pass frequencies and/or inlet guide vane pass frequencies and still meet the performance guarantee. Historically, design practice focused on stress levels and avoiding one time vane pass frequencies. In general, this approach has been very successful at eliminating stress and one-time vane pass frequency failures. However, it must be emphasized that current tools can incorrectly predict excitation modes due to twice the diffuser vane or inlet guide vane pass frequencies. It has been Cameron’s experience that most field failures are in this two times vane pass frequency range. The development of a custom in-house tool for accurate stress and modal analyses of centrifugal impellers has been a major task at Cameron in the past few years. This thrust resulted in Cameron’s cooperation with Pointwise, Inc. to develop a set of automated tools to utilize higher order finite element meshes for such analyses. Pointwise has established itself as the world-leading mesh generation software for Computational Fluid Dynamics (CFD) analysis. However, the flexibility and versatility of this meshing software also makes it a very attractive and powerful tool for generating Finite Element Analysis (FEA) meshes. This work focuses on a utilization of Pointwise for automated generation of higher order finite element meshes for centrifugal impeller blades. Pointwise-based automated tools generate a fully structured mesh of higher order elements that involves every detailed feature of the centrifugal impeller. The mesh retains geometric validity of the centrifugal impeller and maintains accurate geometrical resolution of the higher order surfaces associated with the impeller blade and hub. The structural and modal analyses are then automatically performed in ANSYS. We show that the Pointwise-based meshing tools are both general and robust. They allow for high quality, higher order finite element meshes for an entire range of applications that we encounter at Cameron Compression Systems on a daily basis. This work demonstrates the attractiveness of higher order finite element meshes for accurately predicting the natural frequencies for centrifugal impellers for an entire range of desired frequencies. We present finite element mesh convergence studies, and utilize a Pointwise based meshing tool together with ANSYS to accurately predict failure modes for impellers that have experienced field failures in the last decade.
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Reports on the topic "Mont Cameroun"

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Belporo, Lydie. Building Peace through DDR Programs: Lessons from Reintegrating Boko Haram Ex-Recruits in Cameroon. RESOLVE Network, August 2021. http://dx.doi.org/10.37805/pn2021.19.lpbi.

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In the countries of the Lake Chad Basin, Boko Haram’s emergence has created major new security challenges for the region’s governments. Cameroon’s Far North region, the most populous in the country, is at the heart of these security issues. Since late 2020, Boko Haram has intensified attacks in Far North localities with assassinations targeting civilians, kidnappings, and looting in small towns along the Nigerian border. In response, the Cameroonian government has pursued a hardline strategy and militarized the affected localities. In addition to arbitrary arrests, prolonged pre-trial detention, prison overcrowding, and the death penalty are all sources of concern. This policy note outlines core findings from a case study of the Boko Haram ex-associates reintegration process in Cameroon. The note examines how existing community norms or mechanisms might be as useful as more standard approaches to disarmament, demobilization, and reintegration (DDR) in addressing challenges presented by Boko Haram ex-associates in Cameroon.
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The adolescent experience in-depth: Using data to identify and reach the most vulnerable young people—Cameroon 2004. Population Council, 2009. http://dx.doi.org/10.31899/pgy13.1010.

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