Koudougou, Burkina Faso

University of Koudougou

Koudougou, Burkina Faso
Time filter
Source Type

Bikienga M.,University of Koudougou | Choquet-Geniet A.,University of Poitiers | Geniet D.,University of Poitiers
International Journal of Critical Computer-Based Systems | Year: 2017

Classically, the temporal validation of a hard real-time application is performed using the WCET's, for instance by means of simulation. But since the actual behaviour of the application uses the ACET's which may be shorter than the WCET's, the simulated and the effective behaviours may be different. Verifying whether an application behaves in accordance to a given scheduling strategy requires to precisely specify how the application is expected to behave in the case of ACET's shorter than the WCET's. For that aim, we define two notions of compliance. The non-flexible compliance imposes the strict respect of the start times given by the simulated schedule, whereas the flexible one tolerates a higher level of conservatism. We then discuss the advantages of each, and show that using any of them preserves the validity of the behaviour of the application. Copyright © 2017 Inderscience Enterprises Ltd.

Zoundi C.,DRES PC | Ouattara F.,University of Koudougou | Fleury R.,ENST Bretagne | Amory-Mazaudier C.,University Pierre and Marie Curie | Lassudrie Duchesne P.,ENST Bretagne Technopole
European Journal of Scientific Research | Year: 2012

This paper presented the seasonal variability of TEC/GPS data recorded at Ouagadougou a West Africa GPS station located near the magnetic equator. Seasonal data TEC time variations are compared to those of TEC derived from IGS GPS network maps. The present study showed that TEC map model predicts well data TEC during equinoctial months and fairly well during solstice months. The best prediction is obtained during spring and the worst during winter. The analysis of seasonal TEC profiles highlighted that model accuracy shows seasonal variations with respect to the complexity of TEC time variations. This work pointed out that model accuracy depends not only on the integration of station data in IGS GPS network data but also on the presence of daytime multi-peaks and/or the presence and the amplitude of night time peak. Solstice and summer data TEC analysis showed that those present F2 layer annual anomaly. © 2012 EuroJournals Publishing, Inc.

Ouattara F.,University of Koudougou | Zoundi C.,Direction Regional de lEnseignement Secondaire Plateau Central DRES PC | Fleury R.,Telecom Bretagne
Indian Journal of Radio and Space Physics | Year: 2012

The paper presents the comparison between total electron content (TEC) map given by CODG model and Rinex TEC obtained from Koudougou GPS station, which started its operations in December 2008. The TEC observations were carried out at Koudougou station during 5-10 December 2008 by ionosphere single layer model (SLM). The observation of TEC profiles showed noon bite out profile with predominance of morning or afternoon peak and night time peak. CODG TEC profiles highlighted dome and reverse profiles. There is no night time peak in TEC map profiles. The comparison between GPS based TEC observation at Koudougou station and TEC map shows that CODG model does not estimate Rinex TEC at Koudougou station.

Guissou K.M.L.,University of Koudougou | Kristiansen T.,University of Aarhus | Lykke A.M.,University of Aarhus
Ethnobotany Research and Applications | Year: 2015

Ethnobotanical interviews on the use of food plants were conducted with 90 informants from two villages in eastern Burkina Faso. A total of 25 plant species and one type of stock cube were included in a structured questionnaire regarding use, importance, reasons behind use, changes in use, and preferences, followed by a supplementary semi-structured questionnaire about reasons behind use, changes, and preferences. Most species were highly used and considered important. Adansonia digitata L., Bombax costatum Pellegr. & Vuillet, Parkia biglobosa (Jacq.) R.Br. ex G.Don, and Vitellaria paradoxa C.F.Gaertn. were particularly important and useful species. Tradition, taste, health, and the lack of other possibilities were main reasons for people using the plants. A decline in traditional food products and an emergence of new products were observed. Answers were strongly related to informants’ home-village and project-contact. There seems to be an extensive interest in health aspects and, consequently, a potential for an increased use of healthy traditional products if people are better informed about their nutritive qualities. © 2015, University of Hawaii at Manoa. All rights reserved.

Ouattara F.,University of Koudougou | Zerbo J.L.,Bobo-Dioulasso Polytechnic University
International Journal of Physical Sciences | Year: 2011

Solar sources of geomagnetic activity are determined by means of (1) Mayaud aa index values from 1868 to now; (2) sudden storm commencement (SSC) dates and (3) pixel diagrams. From 1966 to 1998 that is, during 33 years severe geomagnetic storms characterised by aa > = 100 nT have been identified and their solar sources determined. During these three solar cycles (cycles 20, 21 and 22) the effects of these solar disturbance events on Ouagadougou ionosphere F2 parameters (foF2 and h'F2) variations are studied. Each disturbed F2 parameters morphology variations are computed and shown and after compared to each whole F2 parameters morphology variation. The analysis of whole and disturbed F2 parameter morphologies and their variations gives the main following results: (1) Severe storms are responsible for equinoctial anomaly in foF2; (2) shock activity causes vernal equinoctial asymmetry in foF2 and autumnal equinoctial asymmetry in h'F2; (3) fluctuating wind streams produce autumnal equinoctial asymmetry in foF2 and vernal equinoctial asymmetry in h'F2; (4) Geomagnetic activities produced negative storms from 1966 to 1981 and positive storms from 1981 to 1987; (5) For the seasonal variation we have positive storms all through the year except in April where we observe negative storms. ©2011 Academic Journals.

PubMed | INRAB Benin, British Petroleum, University of Koudougou, Fundacion CETEMAS and 2 more.
Type: Comparative Study | Journal: Tropical animal health and production | Year: 2015

A total of 1015 adult cows belonging to nine West African cattle breeds were assessed for 16 body measurements and 18 qualitative traits to ascertain the existence of geographical patterns of variation. Sampling was carried out in 29 different provinces of Mali, Burkina Faso and Benin. For body measurements, taurine breeds took lower average values than the zebu breeds. Sanga cattle took intermediate values. Qualitative traits did not allow to differentiate among cattle groups (taurine, zebu or sanga) or breeds. Principal component analysis identified two factors explaining 56.4 and 9.2% of the variance for body measurements, respectively. Two correspondence analysis dimensions computed on qualitative traits explained a small proportion of the variability (20.8 and 13.5%, respectively). Contour plots were constructed using the eigenvalues computed for each individual and either factor or dimension identified; confidence regions calculated confirmed that body measurements clearly differentiated zebu and taurine cattle breeds while qualitative traits did not. Factor 1 was projected on a geographical map, using provinces as nodes, to assess breed-free variation for body measurements. A pattern of continuous variation from the Sahel area southwards was identified. Probably, breeding decisions promoting the crosses between zebu-like and taurine cattle are underlying this geographical pattern of variation. The implementation of selection strategies aiming at the increase of the productivity of native West African taurine cattle breeds while avoiding looses in trypanotolerant ability would be highly advisable.

Ouattara F.,University of Koudougou | Ouattara F.,French National Center for Scientific Research | Amory-Mazaudier C.,French National Center for Scientific Research
Journal of Space Weather and Space Climate | Year: 2012

This paper presents the statistical analysis of the diurnal variations of the F layer at the equatorial station of Ouagadougou (Lat: 12.4° N; Long: 358.5° E; dip: 5.9°) from 1966 to 1998 (=> ~11 680 days). We consider three main factors of variability: (1) the season (spring, summer, autumn and winter), (2) the phase of the sunspot cycle (ascending, maximum, descending and minimum) and (3) the geomagnetic activity classified by Legrand and Simon in four groups: slow solar wind, high solar wind streams, fluctuating solar wind and shock activity. We easily identify the influence of the solar wind speed and shock activity on the diurnal pattern of the F layer. Shock and recurrent activities tend to enhance or diminish the morning or afternoon maximum of the F2 layer critical frequency. The difference of the diurnal foF2 variation during the increasing and decreasing phases of the sunspot solar cycle is explained by different solar wind regimes. The slow solar wind dominates during the increasing phase of the sunspot cycle and the fluctuating solar wind dominates during the decreasing phase of the sunspot cycle. This paper demonstrates that it is possible using a large database, to bring up significant morphologies of the diurnal variation of the foF2 critical frequency as a function of (1) different solar events such as quiet solar wind, fluctuating wind, recurrent high stream wind and Coronal Mass Ejections (CMEs); (2) solar cycle phases and (3) seasons. It is an approach directly connecting the critical frequency of the F2 layer to the solar parameters. © Owned by the authors, Published by EDP Sciences 2012.

Sanon E.,University of Ouagadougou | Guissou K.M.L.,University of Koudougou | Yorou N.S.,University of Parakou | Buyck B.,French Natural History Museum
Cryptogamie, Mycologie | Year: 2014

In this first study on Russula in Burkina Faso, which represents the first taxonomic study of this genus for the whole of West-Africa, the authors discuss, in alphabetical order, five brownish russulas, four of which represent new species: Russula fissurata sp.nov. in subsect. Brunneodermatinae, R. oculata sp. nov. in subsect. Mamillatinae, R. sankarae sp. nov. in subsect. Aureotactinae, R. turpis sp. nov. in subsect. Aurantiomarginatinae, whereas R. oleifera is here accepted as type species of Oleiferinae subsect. nov. in sect. Ingratae. © 2014 Adac. Tous droits réservés.

Yorou N.S.,Ludwig Maximilians University of Munich | Gardt S.,Ludwig Maximilians University of Munich | Guissou M.-L.,University of Koudougou | Diabate M.,Center Regional Of Recherche Agronomique Pour La Guinee Forestiere Crra Seredou Irag Cra | Agerer R.,Ludwig Maximilians University of Munich
Mycological Progress | Year: 2011

We used a combination of molecular-phylogenetic inference of 82 ITS rDNA sequences and anatomical approach to describe three new west African thelephoroid species, namely Tomentella afrostuposa, T. guineensis and T. guinkoi. Anatomically, T. afrostuposa is reminiscent of T. stuposa with globose to broadly ellipsoid large basidiospores of 8-14 μm, long aculei of up to 3 μm and prominent apiculi of 2 μm width. Molecular-phylogenetically, it falls within the T. stuposa complex. However, T. afrostuposa deviates by at least 7.80-10.74% from T. stuposa in regard with the ITS rDNA sequences. Tomentella guineensis is characterised by long (up to 85 μm) utriform basidia, the presence of reniform basidiospores in lateral view (up to 9 μm) with aculei not exceeding 1 μm and a strong cyanescent reaction of the subhymenial hyphae and basidia in 2.5% KOH. It forms a sister species of the newly described species Tomentella maroana; however, deviating from the last species by at least 9.75-10.04%. The very short, inflated (up to 14 μm) and thick-walled septate (septa up to 1.5 μm) subhymenial hyphae combined with ellipsoid basidiospores (up to 8 μm) and short aculei not exceeding 0.5 μm characterise Tomentella guinkoi. Anatomically, T. guinkoi recalls T. ellisii. Genetic distance between both species ranges from 12.67 to 13.73% according to ITS rDNA sequences analyses. Tomentella guinkoi forms a sister species of the group composed of T. ellisii, T. hjortstamiana and T. pisoniae. Detailed anatomical comparisons between the newly described species and their close relatives are given. © 2011 German Mycological Society and Springer.

Gardt S.,Ludwig Maximilians University of Munich | Yorou N.S.,Ludwig Maximilians University of Munich | Guissou M.-L.,University of Koudougou | Guelly A.K.,University of Lomé | Agerer R.,Ludwig Maximilians University of Munich
Nova Hedwigia | Year: 2011

Amaurodon angulisporus is described as a new species based on material we collected in northern Guinean seasonal forest zones of Togo and Burkina Faso (West Africa). We used a combination of anatomical and LSU rDNA-based molecular phylogeny to characterise the new species. Amaurodon angulisporus is characterised by bluish basidiocarps when fresh that turn greenish grey when dried. Anatomically, it is characterised by the presence of irregularly ovoid to ellipsoid small pale blue (in water) to dark blue violet (in 2.5% KOH) basidiospores of 4,5 to 7 μm (in both frontal and lateral face) and the presence of cystidia-like elements in the hymenium. The most similar species to A. angulisporus regarding LSU rDNA sequences is A. aquicoeruleus, a species described from Australia with a sequence identity of 95%. Molecular-phylogenetically, A. angulisporus forms a sister species of the group comprising A. viridis, A. aquicoeruleus and A. hydnoides. Anatomical dissimilarities between A. angulisporus and each of the above mentioned species are discussed. © 2011 J. Cramer in Gebr.

Loading University of Koudougou collaborators
Loading University of Koudougou collaborators