Publications (5580)
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Combustion de granulés de polyéthylène pur et de sachets plastiques à base de polyéthylène : effet de la masse et de la température sur les émissions d’oxydes d’azote et de carbone et l’évolution de l’oxygène
Salifou Koucka Ouiminga, Thomas Rogaume, Bila Gérard Segda, Moussa Sougoti, Jean KoulidiatiLe présent travail est une étude expérimentale comparative des émissions d’espèces gazeuses lors de la combustion de granulés de polyéthylène pur et de sachets plastiques à base de polyéthylène. Deux paramètres importants de la dégradation thermique sont étudiés pour chacune des...
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Permeability to water of sintered clay ceramics
D. BATHIEBOThe microstructural characteristics of sintered clay ceramics depend mainly on the clay type and thermal transformations. Different pore morphology and connectivity change the liquid water flow process through the material, as in the case of roof tiles which are progressively saturated with...
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Indications et apports de l’endoscopie au tube rigide dans l’exploration des voies aérodigestives en ORL
OUOBA K, GYEBRE YMC, OUEDRAOGO BP, SERME M, ELOLA A, OUEDRAOGO I, OUATTARA M, DIALLO, SANOU J.Résumé
Introduction : L’endoscopie au tube rigide des voies aéro-digestives hautes est une exploration encore courante
dans les pays en développement. Le but de cette étude était de préciser ses indications et ses résultats dans le
service d’ORL du CHU de Ouagadougou...
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Rates of coverage and determinants of complete vaccination of children in rural areas of Burkina Faso
Sia, Drissa, Pierre Fournier, Jean-François Kobiané et Blaise SondoBurkina Faso's immunization program has benefited regularly from national and international support. However, national immunization coverage has been irregular, decreasing from 34.7% in 1993 to 29.3% in 1998, and then increasing to 43.9% in 2003. Undoubtedly, a variety of factors contributed to...
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FFT/IFFT Pair Based Digital Filtering for the Transformation of Adding Signal PAPR Reduction Techniques in Tone Reservation Techniques
Guel Désiré and Palicot JacquesOrthogonal Frequency Division Multiplexing (OFDM) suffers from a high Peak-to-Average Power Ratio (PAPR). Tone Reservation (TR) is a popular PAPR reduction technique that uses a set of reserved subcarriers to carry the peak reducing signal. The major advantages of TR technique include no...
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A Figure-of-Merit for Evaluating the Overall Performance of OFDM PAPR Reduction Techniques in the Presence of High Power Amplifier
Guel Désiré and Palicot JacquesOne of the major drawbacks of Orthogonal Frequency-Division Multiplexing (OFDM) is the large envelope fluctuations which either require an inefficient use of High Power Amplifiers (HPA) or decrease the system performance. Peak to-Average Power Ratio (PAPR) is a very well known measure of the...
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Study of floristic diversity and structural dynamics of some species providers of non woody products in the vegetable formations of the Centre East Region of Burkina Faso.
Ky K.J.M., Gnoula C., Zerbo P., Simporé J., Nikiéma J-B. et Millogo-Rasolodimby J.Cet article de 08 pages, 03 tableaux, 06 figures et 36 références, avait pour but de contribuer à une meilleure connaissance de certaines espèces fournissant des Produits Forestiers Non Ligneux (PFNL) dans le Centre-Est du Burkina Faso. Cette étude vise à déterminer l'état des ressources...
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[Ceramic clay from Burkina Faso used in building construction]: Céramiques d'argile du Burkina Faso utilisées en construction immobilière
D. BATHIEBO2 raw clays samples from Burkina Faso were analyzed in order to improve the ceramic process of roof tiles and small bricks manifacture. The major phases etected by X-ray diffraction in the 2 samples are kaolinite, illite, orthose and quartz. In addition, feeble quantities of albite and...
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Transformation grâce à un Filtrage Numérique des techniques "Ajout de Signal" en techniques "Tone Reservation" pour la Réduction du PAPR des Signaux OFDM
Désiré GUEL, Jacques PALICOTL'OFDM (Orthogonal Frequency Division Multiplexing) souffre d'une grande variation d'amplitude caractérisée par un PAPR (Peak-to-Average Power Ratio) élevé. La "Réservation Tone" (TR) est une technique de réduction de PAPR qui utilise un ensemble de porteuses réservées pour...
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In vitro Antibacterial Properties of Total Alkaloids Extract from Mitragyna Inermis (Willd.) O. Kuntze, a West African Traditional Medicinal Plant
Cheikna Zongo, Etienne-Francois O. Akomo, A. Savadogo, Louis Clement Obame, Jean Koudou and Alfred S. TraoreThe antimicrobial activity of the total alkaloids from the leaves of Mitragyna inermis (Willd.) O. Kuntze (Rubiaceae) From Burkina Faso was evaluated using disc diffusion essay and broth microdilution assay. The extract was used against ten (10) reference bacterial strains and three (3) clinical...
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Biodepollution of wastewater containing phenolic compounds from leather industry by plant peroxidases
Mamounata Diao • Nafisse´tou Oue´draogo • Lamine Baba-Moussa • Paul W. Savadogo • Amani G. N’Guessan • Imael H. N. Bassole´ • Mamoudou H. DickoThis study deals with the use of peroxidases (POXs) from Allium sativum, Ipomoea batatas, Raphanus sativus and Sorghum bicolor to catalyze the degradation of free phenolic compounds as well as phenolic compounds contained in wastewater from leather industry. Secretory plant POXs were able...
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Analysis and comparison of clipping techniques for OFDM Peak-to-Average Power Ratio reduction
Guel Desire and Palicot JacquesOne of the main disadvantages of Orthogonal Frequency Division Multiplexing (OFDM) is its high Peak-to-Average Power Ratio (PAPR), which significantly reduces the efficiency of the High Power Amplifier (HPA). Due to the simplest way for PAPR reduction, clipping techniques are frequently used in...
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Experimental characterization of gaseous species emitted by the fast pyrolysis of biomass and polyethylene
S. K. Ouiminga, T. Rogaume, M. Sougoti, J-M. Commandré, J. KoulidiatiThis study aims to experimentally characterize the carbonaceous and nitrogenous species, from the flash pyrolysis of millet stalks and polyethylene plastic bags, using the device of the tubular kiln, coupled to two gas analyzers: Analyzer Fourier Transform Infrared (FTIR) and an analyzer...
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La problématique diaspo à l’université de Ouagadougou ou les paradoxes de l’identité nationale burkinabè
Bouraiman ZONGOA l’intérieur du champ de la migration, la problématique diaspo à l’Université de Ouagadougou est analysée comme une question identitaire dans un contexte social de rencontre et de diversité culturelle. L’objectif du texte est de mettre en évidence les difficultés que les...