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Search Results: 1 - 10 of 98 matches for " Dieudonné Niyonkuru "
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Application of the Frobenius Method to the Schrodinger Equation for a Spherically Symmetric Hyperbolic Potential  [PDF]
Hippolyte Nyengeri, Rénovat Nizigiyima, Eugène Ndenzako, Félix Bigirimana, Dieudonné Niyonkuru, Audace Girukwishaka
Open Access Library Journal (OALib Journal) , 2018, DOI: 10.4236/oalib.1104950
Abstract:
In this paper, an efficient technique for computing the bound state energies and wave functions of the Schrodinger Equation (SE) associated with a new class of spherically symmetric hyperbolic potentials is developed. This technique is based on a recent approximation scheme for the orbital centrifugal term and on the use of the Frobenius method (FM). The bound state eigenvalues are given as zeros of calculable functions. The corresponding eigenfunctions can be obtained by substituting the calculated energies into the recurrence relations for the expanding coefficients of the Frobenius series representing the solution. The excellent performance of this technique is illustrated through numerical results for some special cases like Poschl-Teller potential (PTP), Manning-Rosen potential (MRP) and Poschl-Teller polynomial potential (PTPP), with an application to the Gaussian potential well (GPW). Comparison with other methods is presented. Our results agree noticeably with the previously reported ones.
Deploying Safety-Critical Applications on Complex Avionics Hardware Architectures  [PDF]
Robert Hilbrich, Laurent Dieudonné
Journal of Software Engineering and Applications (JSEA) , 2013, DOI: 10.4236/jsea.2013.65028
Abstract:

Aviation electronics (avionics) are sophisticated and distributed systems aboard an airplane. The complexity of these systems is constantly growing as an increasing amount of functionalities is realized in software. Thanks to the performance increase, a hardware unit must no longer be dedicated to a single system function. Multicore processors for example facilitate this trend as they are offering an increased system performance in a small power envelope. In avionics, several system functions could now be integrated on a single hardware unit, if all safety requirements are still satisfied. This approach allows for further optimizations of the system architecture and substantial reductions of the space, weight and power (SWaP) footprint, and thus increases the transportation capacity. However, the complexity found in current safety-critical systems requires an automated software deployment process in order to tap this potential for further SWaP reductions. This article used a realistic flight control system as an example to present a new model-based methodology to automate the software deployment process. This methodology is based on the correctness-by-construction principle and is implemented as part of a systems engineering toolset. Furthermore, metrics and optimization criteria are presented which further help in the automatic assessment and refinement of a generated deployment. A discussion regarding a tighter integration of this approach in the entire avionics systems engineering workflow concludes this article.

Barthes, leitor de Malraux: uma oculta??o terrorista
Dieudonné, Julien;
Alea : Estudos Neolatinos , 2003, DOI: 10.1590/S1517-106X2003000200005
Abstract: this article treats the current dislike in france for malraux, author of the novel man's fate, by discussing the almost complete absence of reference to his works by roland barthes. malraux is considered to have abandoned his leftist revolutionary stance after accepting political office next to minister de gaulle. barthes almost never mentions malraux or does it in order to discredit the writer and the minister he works for. this article tries, through fine irony, to offer an alternative to barthes' view and attempts to recover malraux's place in the panorama of french literature from the 1930's.
Recent development in the theory of linear partial differential equations
Jean Dieudonné
International Journal of Mathematics and Mathematical Sciences , 1980, DOI: 10.1155/s0161171280000014
Abstract: A historical development of the theory of linear partial differential equation is reviewed with comments. A recent development in the theory of linear partial differential equations is discussed.
Gelfand pairs and spherical functions
Jean Dieudonné
International Journal of Mathematics and Mathematical Sciences , 1979, DOI: 10.1155/s0161171279000168
Abstract: This is a summary of the lectures delivered on Special Functions and Linear Representation of Lie Groups at the NSF-CBMS Research Conference at East Carolina University in March 5-9, 1979. The entire lectures will be published by the American Mathematical Society as a conference monograph in Mathematics.
Religion and University
Dieudonné Datonou
Alteridad : Revista de Educación , 2011,
Abstract: Ante los alcances y las perspectivas de progresos de la ciencia y de la técnica, muchos, postulando que la religión está relacionada con fenómenos o aspectos de la vida y del mundo transitoriamente inexplicado, profetizaron que ella, paulatinamente, desplazaría sus fronteras a medida de los avances de la racionalidad científica, hasta desaparecer del horizonte del ser humano. La corriente filosófica del iluminismo había abierto ese camino y, entusiasmados por la Revolución industrial de los siglos XVIII-IXX en Europa, algunos anunciaron el declinar de la religión. El filosofo Karl Marx y sus seguidores difundieron bastante esa opinión, presentando la religión no solo como una realidad prelógica, sino también como un opio, una esclavitud para el ser humano.
Corporate Groups under the Laws of Rwanda: An Economic Reality without Legal Identity  [PDF]
Dieudonné Nzafashwanayo
Beijing Law Review (BLR) , 2016, DOI: 10.4236/blr.2016.72010
Abstract: Corporate groups have become common in and dominate the business world. They emerge from reconfiguration of large companies into a multitude of subsidiaries from the simplest radial structure to the complex pyramidal and circular structures, in all structures, all companies within the group being ultimately held by a single parent company. Despite the omnipresence of corporate groups and their place in business world, their legal nature is yet to be seen whereas the use of this structure (corporate groups) to conduct business leads to tensions with traditional corporate law notions of each company being a separate legal entity and the blurring of lines of independence and modus operandi of corporate groups can be dangerous for creditors, employees, minority shareholders and pose challenges for regulators (such as taxman and anti-trust regulatory bodies) assessing the status of transactions conducted within the group. This article will discuss the notion of corporate groups under the laws of Rwanda and will argue that, albeit the fact that corporate groups (under traditional principles of corporate law) do not have legal existence, in some branches of law such as tax, anti-trust, employment, banking and finance law, the same have got a legal recognition and are treated as such. However, it will be submitted that the tenor of and challenges posed by corporate groups call for a clear recognition and stand of the legislator on the legal nature of corporate groups.
Impact of acadja fisheries on fish assemblages in Lake Nokoué, Benin, West Africa Impact des pêcheries en acadjas sur les assemblages de poissons du Lac Nokoué au Bénin, Afrique de l’Ouest
Niyonkuru C.,Lalèyè P.A.
Knowledge and Management of Aquatic Ecosystems , 2010, DOI: 10.1051/kmae/2010033
Abstract: Acadjas are artificial systems aimed at enhancing fish production by providing additional substrata for development of plants and animals upon which the fish will feed. This study aims to evaluate the impact of acadjas on fish assemblages and on conservation of the fish fauna diversity in Lake Nokoué in Benin. Between June 2003 and September 2004, experimental acadjas were installed and monitored. Fish samples were obtained from two areas of Lake Nokoué (Ganvié and Zogbo stations) within and without acadjas with the assistance of artisanal fishermen. Physico-chemical parameters were also measured inside and outside of the experimental acadjas in the same two stations. Twenty-five fish species belonging to 17 families were identified in acadjas out of a total of 51 species belonging to 34 families inventoried in 2001 at Lake Nokoué (i.e. 49% of the specific richness of the ichthyofauna). Fifty-six percent of fish fauna caught in acadjas are estuarine forms and represent 78% of all estuarine forms of Lake Nokoué in 2001. The analysis of variance showed that the specific richness of the acadjas varied significantly according to the station (p < 0.05), with a high specific richness in Zogbo station where acadjas are less abundant. Acadjas are selective for some fish species such as cichlids which represent 95% of the total numeric abundance and contribute about 90% of the total fish biomass. The high densities of acadjas could contribute to the reduction of the richness of fish fauna. Rational management could consist of reorganizing the surface areas of Lake Nokoué by preserving areas for other fish species that do not colonize acadjas. Les acadjas, ou parcs à poissons, sont des systèmes artificiels visant l’augmentation de la production de poisson en fournissant du substrat complémentaire pour le développement des plantes et animaux devant servir de nourriture aux poissons. Cette étude a pour objectif d’évaluer l’impact des acadjas sur les assemblages des poissons et la conservation de la diversité ichtyologique du lac Nokoué au Bénin. Ainsi, entre juin 2003 et septembre 2004, les acadjas expérimentaux ont été installés et suivis. Les échantillons de poissons ont été obtenus dans les deux stations (Ganvié et Zogbo) du lac Nokoué à l’intérieur et à l’extérieur des acadjas à l’aide des pêcheurs artisanaux. Les paramètres physico-chimiques ont été également mesurés à l’intérieur et à l’extérieur des acadjas expérimentaux des mêmes stations. Au total, 25 espèces de poissons appartenant à 17 familles ont été identifiées à l’intérieur des acadjas sur un total de
Circle Formation of Weak Robots and Lyndon Words
Yoann Dieudonné,Franck Petit
Computer Science , 2006,
Abstract: A Lyndon word is a non-empty word strictly smaller in the lexicographic order than any of its suffixes, except itself and the empty word. In this paper, we show how Lyndon words can be used in the distributed control of a set of n weak mobile robots. By weak, we mean that the robots are anonymous, memoryless, without any common sense of direction, and unable to communicate in an other way than observation. An efficient and simple deterministic protocol to form a regular n-gon is presented and proven for n prime.
Deterministic gathering of anonymous agents in arbitrary networks
Yoann Dieudonné,Andrzej Pelc
Computer Science , 2011,
Abstract: A team consisting of an unknown number of mobile agents, starting from different nodes of an unknown network, possibly at different times, have to meet at the same node. Agents are anonymous (identical), execute the same deterministic algorithm and move in synchronous rounds along links of the network. Which configurations are gatherable and how to gather all of them deterministically by the same algorithm? We give a complete solution of this gathering problem in arbitrary networks. We characterize all gatherable configurations and give two universal deterministic gathering algorithms, i.e., algorithms that gather all gatherable configurations. The first algorithm works under the assumption that an upper bound n on the size of the network is known. In this case our algorithm guarantees gathering with detection, i.e., the existence of a round for any gatherable configuration, such that all agents are at the same node and all declare that gathering is accomplished. If no upper bound on the size of the network is known, we show that a universal algorithm for gathering with detection does not exist. Hence, for this harder scenario, we construct a second universal gathering algorithm, which guarantees that, for any gatherable configuration, all agents eventually get to one node and stop, although they cannot tell if gathering is over. The time of the first algorithm is polynomial in the upper bound n on the size of the network, and the time of the second algorithm is polynomial in the (unknown) size itself. Our results have an important consequence for the leader election problem for anonymous agents in arbitrary graphs. For anonymous agents in graphs, leader election turns out to be equivalent to gathering with detection. Hence, as a by-product, we obtain a complete solution of the leader election problem for anonymous agents in arbitrary graphs.
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