An CFRP fabrics as internal reinforcement in concrete beams

This paper presents preliminary results of an experimental programme that investigated mechanical properties of a balanced-symmetric CFRP fabric laminate. Although FRP fabrics have potential to be formed into efficient reinforcement systems that can enable the development of innovative low embodied energy concrete structures, very little research on applications of FRP fabrics has been reported in the literature. In accordance with the classical laminate theory, in a balanced-symmetric laminate there is no coupling between in-plane deformation and curvature, nor between in-plane normal loading and shear deformation. As a result of the choice of lay-up arrangement the flexural reinforcement systems in concrete beams can be designed by considering the conventional section equilibrium analysi

Rupture post traumatique de la membrane de Bruch: à propos d’un cas

Une contusion du globe peut se compliquer de rupture de la membrane de Bruch ou de la choroïde. Cette complication est observée dans 5 à 10% des cas avec une nette prédominance masculine. Nous rapportons l'observation clinique d'un patient de 26 ans, victime d'un traumatisme contusif sévère de l'oeil gauche chez qui l'examen retrouve une rupture de la membrane de bruch au fond d'oeil ; l'evolution spontanné a été marquée parune amélioration visuelle sans complications néovasculaires. Au cours des ruptures post traumatiques de la membrane de bruch le pronostic est essentiellement lié d'une part à sa localisation par rapport à la macula; et d'autre part à la survenue de complications néovasculaires (15 à 30 %des cas)

Optimising Subsidiary Crop Applications in Rotations (OSCAR): A Perspective for the North Africa Region

Background: For sustainable improvement of wheat-based farming systems in the North Africa, there is a need to improve plant health, soil health and fertility. One approach to achieve this is by integrating subsidiary crops (SC) as living or dead mulches or cover crops with the main crops in rotations, which will increase plant species and microbial diversity and reducing water demand in dry climates. Methods: A collaborative research project funded by EU FP 7 (Project No. 289277) was initiated in April 2012, in partnership with European Union (public research organizations and private sector small and medium enterprises of Germany, Norway, Sweden, Denmark, the Netherland, UK, Poland, Switzerland and Italy), Brazil and Morocco (INRA-Morocco and ICARDA), in order to enhance understanding and use of SC systems, develop suitable farm technologies, increase the range of SC species, and enhance understanding of impact of SC on soil ecology, biology and microbial diversity and crop pests and diseases. Results: Based on two field experiments in Morocco (Sidi AI-Aidi and Sidi Allal-Tazi), the project will assess the economic and ecological impact including legume root health and soil health, fertility and microbial diversity and compare the results with other sites in Europe. Screening of new species and genotypes will result in identification of range of potentially useful plant species for SC for the North Africa and Europe. The identified SC species will be tested for their potential as forage and for extraction of useful biochemicals. Conclusion: The results of the project as a whole will be of use for and improve sustainability in low-input, organic, and conventional farming systems in the North Africa, Latin America and Europe

Isolated radial volar dislocation of the fifth carpometacarpal joint :A rare injury

Isolated palmar dislocation of the fifth carpometacarpal joint is an uncommon injury and classified as radio-palmar or ulno-palmar according to the direction of displacement of the fifth metacarpal base . This very rare injury is often  difficult to recognize. A careful neurologic assessment of the patient is a  necessity, as well as obtaining proper radiographs of the hand. The purpose of this report is to present a patient with a pure isolated volar dislocation of the fifth carpometacarpal joint that was satisfactorily treated with closed  reduction and casting. A review of the literature is presente

La prise en charge d’un goitre compressif chez une femme enceinte

Introduction: Les médecins d'urgence reçoivent fréquemment des patients atteints d'une pathologie de la thyroïde. Cependant, il est rare que ces troubles mettent la vie du patient en danger. La compression des voies aériennes supérieures due à une augmentation du volume d'une tumeur bénigne de la thyroïde et peut nécessiter un traitement chirurgical urgent.But: rappeler les modalités de prise en charge d'un goitre chez une femme enceinte.Observation: nous rapportons un cas d'une femme enceinte qui a été admise pour un goitre compressif avec dyspnée laryngée, qui exigeait une thyroïdectomie totale en urgence.Conclusion: La thyroïdectomie urgente chez la femme enceinte peut être réalisée si on respecte les précautions nécessaires.Mots clés: goitre, grossesse, thyroïdectomie.Introduction: emergency physicians frequently encounter patients with thyroid disease. However, it is unusual for these thyroid disorders to create acute, life-threatening situations. Critical airway compression attributable to benign thyroid enlargement may occur suddenly and require urgent treatement.Aim: we recall making procedures in charge of a goiter in pregnant women.Case -report : We report a case of pregnant women who was admitted for compressive goiter with laryngeal dyspnea, which required emergency total thyroidectomy.Conclusion: Urgent thyroidectomy in pregnant women can be performed if we respect the precautions.Keywords: goiter, pregnancy, thyroidectomy

Towards identification of novel legume species of potential interest as cover crops and living mulches for the North Africa region.

Subsidiary crops (SC) grown either as cover crops (CC) preceding or following the main crops, or as living mulches (LM) together with the main crops can deliver multiple ecological services within farming systems. These include increasing the duration of soil cover in the rotation, increasing plant and microbial diversity, improving plant health, soil health and fertility, minimizing the use of tillage and agrochemicals, enhancing biological N fixation and soil C content, and reducing water demand in dry climates. However, species available for growing as SC for dry areas are limited. To identify species of potential interest to CC and LM, we screened 197 accessions from the ICARDA genebank, belonging to 142 species/sub-species at Rabat, Morocco in one square meter plots. The preliminary assessments based on visual observations enabled us to identify: (1) 21 accessions belonging to Medicago and Trifolium species with prostrate growth habit, early maturity and senescence, determinate growth cycle and good potential for seed production, as potentially suitable for LM; and (2) 28 accessions belonging to Vicia, Lathyrus, Medicago and Trifolium species with high biomass and competitive ability, and also good potential for seed production, as potentially suitable for CC or green manure crops. Further evaluations in replicated trials are in progress. The selected accessions have been planted in the field during autumn 2013 at Sidi El Aidi

Achievement high level goals in E-learning with comprehensive feedback; (Standards and Criteria)

Background and Objective:The separation of learner and teacher from each other in e-learning, has made feedback as the most important challenge in this type of learning. Despite, there is no comprehensive framework based on the science of education, so that how to create educational feedback based on learning objectives. The purpose of this study was to compilation the educational standards and their indicators based on the Bloom- Methods: Anderson’s taxonomy for design effective and on time feedback for any educational goal. Qualitative research approach is used and based this approach, the phenomenological design strategy has been used. The population included 12 persons of subject matter and faculty member in academic e-learning centers which were selected through purposeful sampling. Those individuals included in the sample who had three characteristics: a) academic education in e-learning, b) teaching in higher education in the faculties of educational sciences, and c) working in e-learning centers of universities and educational institutions. To gather data semi-structured interviews were used. Qualitative data generated from interviews were coded and analysis by Corbin and Strauss method and Maxquda software. Findings: The results of the study led to the development of 4 educational standards and 25 indicators based on the Bloom-Anderson’s taxonomy to design a comprehensive feedback in the field of e-learning. According to the results of this study, educational technologists can evaluate or design more effective e-learning environments. Conclusion: Overall, feedback plays a key role in e-learning process that can pave the way for identifying problems in the teaching-learning process and proposing improvements to these challenges. However, timing of the feedback is critical. Lack of time shows that the potential benefits of feedback are often not achieved, and instructors are often unable to provide feedback tailored to educational conditions and goals. The results of this study can provide appropriate design and presenting of the feedback with the aim of learning and effective use of educational technologies at the right time. In this regard it can help designers of e-learning environments in a way that the right time to provide feedback is not wasted and always provide feedback at the right time and in the right way. Based on the results of the research, evaluators and administrators of e-learning environments can use the e-learning evaluation form of the paper prepared based on the standards and criteria in a Likert scale to evaluate the feedback method of e-learning instructors.   ===================================================================================== COPYRIGHTS  ©2020 The author(s). This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, as long as the original authors and source are cited. No permission is required from the authors or the publishers.  ====================================================================================

VHDL-AMS modeling and simulation of a direct sequence spread spectrum (DS-SS) transmitter

Many recent standards in telecommunications field are based on CDMA spread spectrum transmissions. In this paper, we describe a methodology for top-down design, modeling, and simulation of CDMA transmitter system using hardware description language VHDL-AMS. Details of VHDL-AMS implementation for each elementary block are shown. This paper together with the developed library of CDMA transmitter blocks are targeted towards engineers who work on behavioral modeling and simulation of complete CDMA systems using hardware description languages

Modélisation (VHDL), simulation et optimisation de l’architecture du récepteurCDMA « Poursuite et Synchronisation »

Cet article présente une amélioration des étages de synchronisation et de poursuite d’un système de communication utilisant l’étalement de spectre par séquence directe, dans le but de réduire le temps d’acquisition et d’augmenter le gain en traitement qui dépend de la longueur de la séquence et des performances de la poursuite. Le travail consiste alors à développer une DLL spécifique cohérente permettant de générer un code de désétalement synchronisé indépendamment du déphasage de la porteuse.Nous proposons un modèle VHDL complet du récepteur CDMA où l'accent est mis sur les organes de synchronisation numériques synthétisables en vue d’une implémentation sur FPGA