188 research outputs found
Contrôle direct de puissance du redresseur triphaséà MLI
No full text40 f. : ill. ; 30 cm. (+ CD-Rom)Le travail présenté dans ce mémoire concerne le contrôle d’un système de conversion de l’énergie éolienne par la commande directe de puissance. Deux objectifs principaux ont été réalisés : - Régulation de tension - Commande directe de puissance Notre système peut donc faire partie d’un système hybride et peut délivrer la puissance qu’on lui demande et gardant la tension constant
Le travail informel : retour sur une notion floue. Remarques à partir du cas des entreprises françaises délocalisées au Maroc
No full textBased on the critical literature as well as on observations collected by the author for the preparation of his Ph. D. thesis, the article addresses the definition and the characterization of the main types of informal employment, the status of work in Morocco, and examines in more detail some atypical forms of work and employment which are related to the operation of French enterprises located in this country (the “ chaouch”, the maid, the …).L’article interroge la définition et les formes du travail informel dans le contexte sociétal marocain à partir de la littérature critique et des observations recueillies dans le cadre d’une thèse de doctorat en Sociologie. A la lumière des données collectées, on développe quelques remarques sur le statut du travail dans la société marocaine et on examine de façon plus précise la problématique du maintien de certaines figures atypiques en relation avec les entreprises françaises délocalisées au Maroc («chaouch » , bonne, porteur).Labari Brahim. Le travail informel : retour sur une notion floue. Remarques à partir du cas des entreprises françaises délocalisées au Maroc. In: Cahiers de sociologie économique et culturelle, n°41-42, 2004. pp. 71-93
Research progress of Tunisian medicinal plants used for acute diabetes
No full textAbstractThe use of the medicinal plants in treating diabetes is frequent in Africa, especially in Tunisia, and it is ritually transmitted from generation to generation within cultures. Many of Tunisian medicinal plants have been experimentally validated. A comprehensive review was conducted to pile up information from scientific journal articles, including indigenous knowledge researches, about Tunisian medicinal plants used for the treatment of diabetes. The aim of this review article is to provide the reader with information concerning the importance of Tunisian medicinal plants in the treatment of diabetes and to draw attention of the health professionals and scientists working in the field of pharmacology and therapeutics to develop new drug formulations to cure different kinds of diabetes
Isotomurus maculatus
No full text50. Isotomurus maculatus (Schäffer, 1896) (Fig. 10) Citation from Edough: Hamra-Kroua (2016: 86); Zoughailech (2017: 137). Not cited from Algeria outside Edough. Distribution: Distribution unclear, requires revision (Fjellberg 2007). The color pattern is slightly different from the specimens from Norway figured by this author and from Italy figured by Carapelli et al. (1995).Published as part of Brahim-Bounab, Hayette, Bendjaballah, Mohamed, Hamra-Kroua, Salah, Lachi, Noureddine, Bedos, Anne & Deharveng, Louis, 2020, Checklist of the springtails (Hexapoda: Collembola) of the Edough massif northeastern Algeria, pp. 51-78 in Zootaxa 4853 (1) on page 68, DOI: 10.11646/zootaxa.4853.1.3, http://zenodo.org/record/441036
Characterization of myrtle seed (Myrtus communis var. baetica) as a source of lipids, phenolics, and antioxidant activities
No full textAbstractThis study aimed to characterize the chemical composition and antioxidant activity of the oil and the methanolic extract of Myrtus communis var. baetica seed. The oil yield of myrtle seed was 8.90%, with the amount of neutral lipid, especially triacylglycerol, being the highest, followed by phospholipids and glycolipids. Total lipids and all lipid classes were rich in linoleic acid. The content of total phenols, flavonoids, tannins, and proanthocyanidins of the methanolic extract and the oil from myrtle seed was determined using spectrophotometric methods. Antioxidant activities of the oil and the methanolic extract from myrtle seed were evaluated using 1,1-diphenyl-2-picrylhydrazyl radical scavenging, β-carotene–linoleic acid bleaching, and reducing power and metal chelating activity assays. In all tests, the methanolic extract of myrtle seed showed better antioxidant activity than oil. This investigation could suggest the use of myrtle seed in food, industrial, and biomedical applications for its potential metabolites and antioxidant abilities
Real-Time Fault Detection and Identification for MMC Using 1-D Convolutional Neural Networks
No full textAutomated early detection and identification of switch faults are essential in high-voltage applications. Modular multilevel converter (MMC) is a new and promising topology for such applications. MMC is composed of many identical controlled voltage sources called modules or cells. Each cell may have one or more switches and a switch failure may occur in anyone of these cells. The steady-state normal and fault behavior of a cell voltage will also significantly vary according to the changes in the load current and the fault timing. This makes it a challenging problem to detect and identify such faults as soon as they occur. In this paper, we propose a real-time and highly accurate MMC circuit monitoring system for early fault detection and identification using adaptive one-dimensional convolutional neural networks. The proposed approach is directly applicable to the raw voltage and current data and thus eliminates the need for any feature extraction algorithm, resulting in a highly efficient and reliable system. Simulation results obtained using a four-cell, eight-switch MMC topology demonstrate that the proposed system has a high reliability to avoid any false alarm and achieves a detection probability of 0.989, and average identification probability of 0.997 in less than 100 ms. - 2018 IEEE.Manuscript received October 23, 2017; revised February 11, 2018 and March 27, 2018; accepted April 16, 2018. Date of publication May 3, 2018; date of current version June 28, 2019. This work was supported by the National Priorities Research Program award (NPRP10-1203-160008) from the Qatar National Research Fund, a member of the Qatar Foundation. (Corresponding author: Serkan Kiranyaz.) S. Kiranyaz, A. Gastli, L. Ben-Brahim, and N. Al-Emadi are with the Department of Electrical Engineering, Qatar University, Doha 2713, Qatar (e-mail: [email protected]; [email protected]; [email protected]; [email protected]).Scopu
Sminthurinus signatus
No full textSminthurinus signatus (Krausbauer, 1898) Sminthurus aureus var. signata Krausbauer, 1898: 496. Sminthurinus signatus – Deharveng 1976: 81. NEW DATA. — First record of the species for Algeria. DISTRIBUTION. — Probably Europe (not recognized in Bretfeld 1999). REMARK Very rare in our samples. The literature about this species is confusing. It is listed in Bretfeld (1999), who follows Stach (1956), as a subspecies of Sminthurinus elegans, with Krausbauer, 1902 given as author. In fact, it was described by this last author as Sminthurus aureus var. signata in 1898, and briefly but clearly characterized by its color pattern. It is very characteristic and common in western Europe (Thibaud 2017), and fully deserves a specific status. Family SMINTHURIDAE Börner, 1913 Genus Allacma Börner, 1906Published as part of Bendjaballah, Mohamed, Zoughailech, Abdelmalek, Brahim-Bounab, Hayette, Hamra-Kroua, Salah, Bedos, Anne & Deharveng, Louis, 2018, Annotated checklist of the springtails (Hexapoda: Collembola) of the Collo massif, northeastern Algeria, pp. 389-414 in Zoosystema 40 (16) on page 410, DOI: 10.5252/zoosystema2018v40a16, http://zenodo.org/record/433596
Sodium Chloride Effect on the Evolution of Fatty Acid Composition in Developing Rape Seedlings
No full textA field guide for cereal disease management: Diseases of barley and wheat in Eritrea
No full textThis guide is a compilation of information on fungal diseases found on barley and wheat in Eritrea over the past three main cropping seasons (2000-2002), following detailed field surveys conducted by the author
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