4,403 research outputs found
Variation of specific morphological traits and ploidy level of five "aegilops" l. species in Morocco
Variation of specific morphological traits and ploidy level of five Aegilops L. species in Morocco.The genus Aegilops L. represents an important natural source of useful genes for wheat breeding, with particular emphasis on biotic and abiotic stress resistance. For successful crosses, the primarily step is to select appropriate Aegilops accessions. In this paper, we studied five Moroccan species of an Aegilops collection on the basis of spike structure and chromosome number. Twenty-eight specific morphological characters were used to differentiate the species. Statistical analyses, in particular the DFA, allowed the characterization of the genetic variability of the species; the two first standardized axes explained 96,2% of the total variability and 100% of the entities were classified within their own group. In addition, the dendrogram constructed using morphological data reveals a significant variability within and between species. Cytogenetic study revealed four species, A. geniculata Roth, A. triuncialis L., A. ventricosa Tausch and A. peregrina Maire & Weiller, to be tetraploid. However, A. neglecta Req. ex. Bertol., where only two accessions are represented in the collection, revealed to be hexaploid, and can then be classified as A. neglecta subsp. recta Chennav
A Systematic Review of Tracing Solutions in Software Product Lines
Software Product Lines are large-scale, multi-unit systems that enable
massive, customized production. They consist of a base of reusable artifacts
and points of variation that provide the system with flexibility, allowing
generating customized products. However, maintaining a system with such
complexity and flexibility could be error prone and time consuming. Indeed, any
modification (addition, deletion or update) at the level of a product or an
artifact would impact other elements. It would therefore be interesting to
adopt an efficient and organized traceability solution to maintain the Software
Product Line. Still, traceability is not systematically implemented. It is
usually set up for specific constraints (e.g. certification requirements), but
abandoned in other situations. In order to draw a picture of the actual
conditions of traceability solutions in Software Product Lines context, we
decided to address a literature review. This review as well as its findings is
detailed in the present article.Comment: 22 pages, 9 figures, 7 table
Le regard entre Je et l’Autre
Le temps de sa narration, la voyeuse interdite - qui donne son nom au roman - laisse entrevoir les possibles plus heureux de la condition des femmes algériennes, ici algéroises, de leurs enfants, comme elle montre les verrous opposés à cette libération et en dénonce les contradictions par la mise en scène des actants mâles, ramenés à des perversions qui sont moins une satire qu'une voie vers une compréhension épistémologique d'une société ; celle-ci est décrite en un microcosme qui vaut, par induction, pour le tout social algérien. Toutefois, le roman de Nina Bouraoui marque la désespérante inanité de ce combat où le pouvoir patriarcal et traditionnel l'emporte sans retour, ne laissant que le roman, ses références à la France et à l'Occident comme tremplin des possibles, des espérances, des sursauts, des projections, des luttes pour échapper à l'aliénation d'être femme arabe.Through her narration, the forbidden " voyeuse ", who gives her name to the French title La voyeuse interdite(translated as Forbidden Vision),gives a perspective on the happier possibilities for the lives of Algerian women, specifically here those from Algiers. At the same time, she shows the shackles preventing this libération and also denounces the contradictions through her representation of male actants, reduced to perversions which figure less as a satire than as a path toward the epistemological understanding of a society. The society of Algiers depicted functions as a microcosm which holds true by induction for the whole of Algerian s;ociety. However, the novel by Nina Bouraoui marks the dispairing inanity of this struggle where patriarchal and traditional power have always prevailed, leaving the novel and its references to France and the West as a springboard of possibilities, hopes, projections and struggles to escape from the alienation of being an Arab woman
Statistical Modeling of Bit-Error-Rates in Asynchronous Multicarrier CDMA and Direct-Sequence CDMA Systems
This paper presents a method for modeling the bit-error-rate (BER) probability density functions (pdf) of asynchronous Multicarrier Code Division Multiple Access (MC-CDMA) and Direct-Sequence Code Division Multiple Access (DS-CDMA) systems. An uplink channel is considered and it is assumed that the only channel distortion introduced by the channel is caused by the timing misalignments. Deterministic spreading sequences are used and the pdfs of each interferer'’s multiple access interference (MAI) are determined as a function of timing offset. A Nakagami-m distribution is fitted to the pdf of the total MAI power and the BER pdf is obtained directly from this Nakagami-m pdf. Both Walsh-Hadamard (WH) and Gold sequences are analyzed and the mean BERs are compared amongst the two multiple access systems for both sets of spreading sequences of varying lengths. The results suggest a higher resistance to MAI in the MC-CDMA technique for the considered environment
Relationship between the sociometric type and academic performance in primary education
Treball Final de Grau en Psicologia. Codi: PS1048. Curs: 2017/201
Un système de pilotage de la performance publique à dominante managériale : analyse de l'expérience de Dubaï
The style of management of Dubai government is very particular. After presenting the characteristics of the city-state and contingency factors acting on its administration, the control system of the public performance of Dubai, based on the principles of New Public Management is described and analyzed.Le mode de gestion de l'administration publique de Dubaï est très spécifique. Après avoir présenté les caractéristiques de la cité-Etat et les facteurs de contingence s'exerçant sur son administration, le système de pilotage de la performance publique de Dubaï, fondé sur les principes du New Public Management est décrit et analysé
Contrôle de gestion et pilotage de la per-formance de l’université : une étude explo-ratoire au sein des Universités Marocaines
L'objet de notre papier est d'étudier la nécessité de contrôle de gestion dans les Universités Marocaines, organisations à vocation public ayant pour mission la recherche et l’offre de formation. D'où la question principale de la recherche : Dans quelle mesure le système de contrôle de gestion serait-il nécessaire pour le pilotage de la performance des Universités Marocaines en contexte d’autonomie et de contractualisation? Pour répondre à cette question, nous avons mobilisé à la fois la littérature en contrôle de gestion et la littérature en management public. Cette double approche théorique a permis de construire des grilles de lecture théoriques quant aux facteurs et aux préalables de la mise en place d’un système de contrôle de gestion.The object of our pa-per is to study the necessity of man-agement control in the Moroccan Uni-versities, organizations which are of public vocation and having for mission research and offer of formation. It is from here that stems the principal ques-tion of the research, namely to what extent the system of management con-trol would be necessary for perfor-mance guiding in terms of Moroccan Universities’ autonomy and contracting. To answer this question we have mobi-lized both the literature of management control and that of public management. This double theoretical approach has permitted us to establish theoretical reading grids relative to factors and pri-or conditions for the setting up of a management control system
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