Douala, Cameroon
Douala, Cameroon

University of Douala, or Université de Douala , is located in Douala in Cameroon. It was founded in 1977. The University of Douala is one of the six public universities of Cameroon.The current structure of the University of Douala was established in 1993. The university incorporated the previous University Centre which was made of the Ecole Supérieure des science Economiques et Commerciales and the Ecole Normale d'Enseignement Technique and which was transformed into a university in 1992.The university has around 40.000 students, 600 teachers and around 600 administrators and collaborators.The University of Douala has six locations in different neighborhoods of the city of Douala: Campus Bassa "Cité SIC" where the main campus is located. Campus Ndogbong Campus Akwa Nkongsamba Yabassi Logbessou The university provides training in economics and commerce, technical training, industrial engineering, medicine and pharmaceutics, arts, fisheries science, humanities, law and politics, science, economic science and management.The university is partner of the AUF Agence Universitaire de la Francophonie, AUA Association des Universités Africaines , AIUAssociation Internationale des Universités , ACU the Association of Commonwealth Universities, AIEA Agence Internationale de l'Energie Atomique , CAMES Conseil Africain et Malgache pour l'Enseignement Supérieur , UNESCO the United Nations of Education, Science and Cultural Organisation and CRUROR/AC Conférence des Recteurs des Universités et des Responsables des Organismes de Recherche d'Afrique Centrale . Wikipedia.

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Tamba J.G.,University of Douala
Energy Sources, Part B: Economics, Planning and Policy | Year: 2017

Cameroon is a poor country aiming to become an emerging country in horizon 2035. The energy sector is one of the key factors for economic growth. This article aims at analyzing the energy sector in Cameroon, taking into account energy potential, the energy structure and current energy policy in the sector. In spite of its high energy potential, the results show that accessibility, availability and affordability of energy are the main factors hindering energy development in different economic sectors of Cameroon. Thus, little progress has been made in improving energy supply due to a number of reasons, especially poverty. © 2017 Taylor & Francis Group, LLC.

Ndjio B.,University of Douala
Urban Studies | Year: 2017

The present paper deals with Chinese transnational sex labour migration in the city of Douala, the economic capital of Cameroon and the country’s major city. Based on ethnographic research conducted in the prostitution milieu of Douala between 2008 and 2012, and on information collected from both scholarly and popular literature, this contribution shows how the development in this African city of what can be called Chinese sexoscapes has induced the reconfiguration of the local geography of commercialised sex work, which for so long was dominated by native sex workers. The paper also demonstrates how many disgruntled Duala sex workers dealt with the so-called Chinese sex invasion of their city by relocating their business to popular entertainment areas commonly characterised in Cameroon as rue de la joie (street of enjoyment). The research argues that this local geography of sexualities has become a site for asserting ethnic, racial or national identity, and especially a space of both inclusion of people profiled as autochthon populations and the exclusion of those branded foreigners. © 2016, © Urban Studies Journal Limited 2016.

Tamba J.G.,University of Douala
Energy Sources, Part B: Economics, Planning and Policy | Year: 2017

In this paper, we use time-series econometric modeling in view of examining the short- and long-run causal relationship among energy consumption, economic growth, and CO2 emissions in Cameroon. The unit root test, the cointegration test, and Granger causality based on the error correction model (ECM) are tested on annual time-series data during the period 1971–2013. The results confirm the presence of a long-run equilibrium relationship between the variables and phenomenon of return to equilibrium. Granger causality based on ECM indicates the existence of three bidirectional relationships in the long run at the 5% level between the variables. There however exists only one unidirectional relationship at the 5% level of significance running from CO2 emissions to energy consumption in the short run. Cameroon should implement policies to maintain the rise in energy consumption while developing energy-saving technologies and increase the renewable energy sources and to keep up economic growth to reduce its CO2 emissions in the atmosphere for the success of its emergence in 2035. © 2017 Taylor & Francis Group, LLC

Lenouo A.,University of Douala
Meteorological Applications | Year: 2014

The propagation of electromagnetic waves emitted from ground-based meteorological radar is determined using high-resolution radiosonde data. In this work, a detailed analysis of surface ducts has been undertaken to determine the anomalous propagation days on the coastal site of Douala in Cameroon (4 °N, 9.7 °E) over the Gulf of Guinea. The median duct strength shows that the strongest ducts are seen in the rainy season and that the surface duct occurs more frequently during the day than at night. The duct strength seasonal variability shows a value over Douala of about - 7.2 M-units for 1200 UTC and - 4.5 M-units for 0000 UTC in January, whereas in July the duct strengths are stronger during the day (-12.8 M-units at 1200 UTC) than at night (-9.8 M-units at 0000 UTC). The Cloudsat data products for Douala and neighbouring areas during the days of 26 January 2009 at 233525 UTC and 5 July 2009 at 233552 UTC were also analysed in association with the statistical discussion. © 2012 Royal Meteorological Society.

Koumi Ngoh S.,University of Douala | Koumi Ngoh S.,University of Yaounde I | Njomo D.,University of Yaounde I
Renewable and Sustainable Energy Reviews | Year: 2012

Hydrogen production plays a very important role in the development of hydrogen economy. Hydrogen gas production through solar energy which is abundant, clean and renewable is one of the promising hydrogen production approaches. This article overviews the available technologies for hydrogen generation using solar energy as main source. Photochemical, electrochemical and thermochemical processes for producing hydrogen with solar energy are analyzed from a technological environmental and economical point of view. It is concluded that developments of improved processes for hydrogen production via solar resource are likely to continue in order to reach competitive hydrogen production costs. Hybrid thermochemical processes where hydrocarbons are exclusively used as chemical reactants for the production of syngas and the concentrated solar radiation is used as a heat source represent one of the most promising alternatives: they combine conventional and renewable energy representing a proper transition towards a solar hydrogen economy. © 2012 Elsevier Ltd.

Silenou Mengoue M.,University of Douala
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2013

We present an approach associated with the Jacobi matrix method to calculate a three-body wave function that describes the double continuum of an atomic two-electron system. In this approach, a symmetrized product of two Coulomb waves is used to describe the asymptotic wave function, while a smooth cutoff function is introduced to the dielectronic potential that enters its integral part in order to have a compact kernel of the corresponding Lippmann-Schwinger-type equation to be solved. As an application, the integral equation for the (e-,e-,He2+) system is solved numerically; the fully fivefold differential cross sections (FDCSs) for (e,3e) processes in helium are presented within the first-order Born approximation. The calculation is performed for a coplanar geometry in which the incident electron is fast (∼6 keV) and for a symmetric energy sharing between both slow ejected electrons at excess energy of 20 eV. The experimental and theoretical FDCSs agree satisfactorily both in shape and in magnitude. Full convergence in terms of the basis size is reached and presented. © 2013 American Physical Society.

Bowong S.,University of Douala
Nonlinear Dynamics | Year: 2010

This paper deals with the problem of optimal control for the transmission dynamics of tuberculosis (TB). A tuberculosis model which incorporates the essential biological and epidemiological features of the disease such as exogenous reinfection and chemoprophylaxis of latently infected individuals, and treatment of the infectious is developed and rigorously analyzed. Based on this continuous model, the tuberculosis control is formulated and solved as an optimal control theory problem, indicating how a control term on the chemoprophylaxis should be introduced in the population to reduce the number of individuals with active TB. The feedback control law has been proved to be capable of reducing the number of individuals with active TB. An advantage is that the proposed scheme accounts for the energy wasted by the controller and the closed-loop performance on tracking. Numerical results show the performance of the optimization strategy. © 2010 Springer Science+Business Media B.V.

Zofou D.,University of Buea | Ntie-Kang F.,University of Buea | Ntie-Kang F.,University of Douala | Sippl W.,Martin Luther University of Halle Wittenberg | Efange S.M.N.,University of Buea
Natural Product Reports | Year: 2013

Covering: 1971 to 2013 This review discusses the medicinal potential of bioactive metabolites isolated from medicinal plants in Central Africa for the treatment of neglected tropical diseases and HIV. A correlation is established between the biological activities of the isolated compounds and the uses of the plants in traditional medicine. Insight is provided on how secondary metabolites from medicinal plants in Central Africa could be exploited for drug discovery. © 2013 The Royal Society of Chemistry.

Yamapi R.,University of Douala
Chaos (Woodbury, N.Y.) | Year: 2010

We analyze the global stability properties of birhythmicity in a self-sustained system with random excitations. The model is a multi-limit-cycle variation in the van der Pol oscillator introduced to analyze enzymatic substrate reactions in brain waves. We show that the two frequencies are strongly influenced by the nonlinear coefficients alpha and beta. With a random excitation, such as a Gaussian white noise, the attractor's global stability is measured by the mean escape time tau from one limit cycle. An effective activation energy barrier is obtained by the slope of the linear part of the variation in the escape time tau versus the inverse noise intensity 1/D. We find that the trapping barriers of the two frequencies can be very different, thus leaving the system on the same attractor for an overwhelming time. However, we also find that the system is nearly symmetric in a narrow range of the parameters.

News Article | November 18, 2015

But one man's garbage is another's treasure, and the unsightly rubbish has become the raw material for Kemit Ecology, a startup that has developed a process for transforming the waste into fuel. The company, launched in July 2014, sweeps the scraps off the streets and uses them to produce "organic charcoal" briquettes for cooking. "It's an ecological solution. Collecting the rubbish cleans up the streets even before it is turned into fuel," said the startup's manager Mueller Tenkeu Nandou. And "from the environmental standpoint, organic charcoal emits very little greenhouse gas and practically no smoke," asserted Tenkeu, who earned a master's in ecology, biodiversity and environment from the University of Douala in 2013 and now researches renewable energy there. The briquettes aim at substituting for charcoal, for which demand is high and the environmental cost rising. "Wood remains the main source of energy in Cameroonian kitchens," said environmentalist Didier Yimkoua . "Statistics are not official but it is thought that about 90 percent of all households use it to cook or smoke food." Charcoal is also pressed into service for other household chores, like heating irons. Add to this thousands of traders who use it for braising or smoking fish and chicken and grilling plantains. As of January, the Ministry of Waters and Forests had issued permits to private entrepreneurs to transform 1,500 tonnes of freshly chopped wood into charcoal. So while not totally inoffensive, the "organic charcoal" could improve matters as it seems to emit two times less polluting gas than traditional charcoal, said Yimkoua. Kemit Ecology estimates that the city of Douala alone consumes 90 tonnes of charcoal per month, much of it extracted from local mangrove trees which grow on an estuary in the Gulf of Guinea. There lies the double attraction, says the little company. A smarter alternative would preserve the mangroves—a precious ecological resource, which absorbs greenhouse gases and acts as a buffer against storms—and also make money. After Kemit Ecology collects the vegetable rubbish aboard a three-wheeled motorbike—also saving cleanup expenses for some local merchants—the company dries the raw material, then chars it in an oven. The next step is to soak the matter in a mixture of water and a white clay called kaolin (used to make porcelain) to form briquettes. These are then packed into 40-kilo (90-pound) bags to be sold. Apart from the environmental benefits—both ecological and aesthetic—"organic charcoal" is cheaper than regular charcoal, according to Tenkeu. One kilo (2.2 pounds) of charcoal costs an average of 91 euro cents ($1.02) in Douala, compared with 72 euro cents for a kilo of briquettes, he said. And one kilo of briquettes is good for cooking up to five meals compared with the two meals that a kilo of wood coal can cook. The project has won over cook Martielle Tchouffa, who has been trying out the "organic" briquettes. "I now prefer it, it's a very good charcoal. It's economical, doesn't smoke, heats well and cooks the food well." At the moment Kemit Ecology produces one tonne of briquettes per month yet is reaching capacity with its order book bulging—orders it cannot always fill, said Tenkeu. He points to the young company's problems—in getting a reliable energy source to bake the kaolin, and securing the funds to go to to the next level of development. Yet they remain hopeful. If the technique catches on, he said, the cost of production will probably go down—and Kemit may even become profitable .

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