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Search Results: 1 - 10 of 144330 matches for " B. Haidar "
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Video Macrosegmentation Using Automatic Analysis of Similarity Matrices
S. Haidar,B. Chebaro,B. Haidar
Information Technology Journal , 2010,
Abstract: In the present study, we propose an automatic method for segmenting video material using the comparison matrix. Without a priori information, neither any training phase, the similarity matrices are filtered then regional minimums and maximums are extracted over the line and column projections. Pseudo-homogeneous areas are identified between each pair of regional minimums. The pseudo-homogeneous areas in the resulting matrix are thus the macro-segment video records in question. We experiment our method over a database of short video commercials to illustrate the potential of our approach. An overall evaluation is finally established and given.
Could Nanoparticles Reinforce Polymer Matrices?  [PDF]
G. Schrodj, M.-P. Hirn, B. Haidar
Journal of Materials Science and Chemical Engineering (MSCE) , 2013, DOI: 10.4236/msce.2013.15011
Abstract: In this work,we challenge the idea that “introducing nanoparticles in polymer matrices enhance properties” which is assumed spreading almost dogmatically. Two series of compounds were prepared: one based on elastomers (solution-SBR) filled with conventional carbon black particles, CB, the other used the same polymer but filled with carbon nanotubes, CNT. The results of two types of experiments were compared on the two series. The first is physical based on the non linear response of filled materials to static deformation, the second physicochemical, stands on calorimetric measurements of the polymer heat of adsorption on the solid. Static deformation effect on dynamic mechanical modulus shows the behavior of the CB filled elastomers was qualitatively identical to that of glassy polymer reflecting the existence of an immobilized fraction of the polymer at the intephase, while that of CNT was found identical to unfilled polymer indicating a poor filler-polymer interactions. Polymer adsorption measured by flow micro calorimeter showed a substantial amount of heat exchange on the surface of CB while no heat of adsorption was detected on CNT. The lack of interaction between the polymer and the CNT, except for a small domain of a narrow polymer molecular weight, prevent any enhancements of mechanical properties. Other applications may be improved.
Phelipanche aegyptiaca Management with Glyphosate in Potato  [PDF]
Mustapha Haidar, Elie Shdeed
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.616256
Abstract: Two years field and greenhouse studies were carried out to evaluate the efficacy of sub-lethal doses of glyphosate (Round upR), ammonia gas, phosphoric acid and sulfuric acid against Phelipanche aegyptiaca in potato. Results showed that sequential application of sub-lethal doses of glyphosate at all tested rates significantly reduced P. aegyptiaca shoot number and shoot dry weight. While, the use of ammonia gas, phosphoric acid and sulfuric acid had no significant effect on the total level of P. aegyptiaca infection as compared to the control. The best results considering both P. aegyptiaca control and selectivity in potato were obtained by sequential application of sub-lethal doses of glyphosate at 60 and 80 g·ai·ha-1. Sequential application of glyphosate at 60 g·ai·ha-1 reduced P. aegyptiaca infection by 100% after 100 days after potato emergence (DAPE). Except for sequential application of glyphosate at 60 and 80 g·ai·ha-1, all tested rates enhanced the maturity rate of potato plants and decreased the number of marketable potato tubers.
Reduced Rates of Metribuzin and Time of Hilling Controlled Weeds in Potato  [PDF]
Walaa Siblani, Mustapha A. Haidar
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.812216
Abstract: The current emphasis on reducing herbicide applications has led to an increase in alternative weed control measures. Field experiment was conducted in the spring of 2014 to examine the effect of hilling-time and reduced-rates of metribuzin and their combinations on weed infestation in potato, and to determine their impact on potato yield. Metribuzin at 0.35, 0.56, or 0.75 kg ai/ha with or without hilling 6, 7, and 8 weeks after planting (WAP) were used. Weed count, weed control visual rating, weed dry weight, potato plant height, number of shoots and leaves, root dry weight, and potato yield were collected. Results showed that metribuzin, at all tested rates, with or without hilling significantly reduced weed infestation after 50, 70, and 110 days after planting (DAP) compared to the check. Best results were obtained by a combination of metribuzin at all tested rates with hilling 6, 7, and 8 WAP. The results suggest that long season weed control and high marketable yield could be achieved by metribuzin at 0.35 kg ai/ha (53% reduction in metribuzin) supplemented with hilling (6 WAP). None of the treatments was toxic to potato plants compared to the hand-weeded plots.
constitución del sujeto ?competente?, el caso de los trabajadores de la construcción Argentina
Gaceta Laboral , 2010,
Abstract: since 2004, the ?national qualification plan for construction industry workers? has been implemented in argentina. this study analyzes one of its lines of action: the recognition of training processes through competence certification. the central goal is to discover the strategic objectives that guide the competence certification technologies and what authorities take part in their regulation. the research was carried out from the labor sociology field, using some conceptual tools derived from the work of foucault, such as the the art of neoliberal government. key informants and institutional documentation were used as sources; the qualitative research techniques were open interviews and documentary content analysis. in conclusion, the objective of competence certification technology is to raise the rate of added value vis à vis ensuring the operation of market processes. a set of actors that form a strategic government alliance (unions and company organizations in the sector, state and civil society agencies, experts) takes part in this process.
Gramsci y los consejos de fábrica: Discusiones sobre el potencial revolucionario del sindicalismo
Trabajo y sociedad , 2010,
Abstract: in the interaction between unions and capitalist society there is a dialectic relationship (hyman, 1978) that has opened a group of questions in the area of theory and socialist practises. those questions are about revolutionary potential in unions, development of worker′s conscience, reach of "revolutionary spontaneity" (espontaneísmo), relationship between union and revolutionary party, among others. on this work we try to explore the position taken by antonio gramsci about these topics in general and revolutionary potential in unions and workers councils under capitalist social-formation in particular. we will revise (from hyman′s work) the visions of marx and engels, lenin, michels, trotsky about unions in capitalism. we will contrast then with the position supported by gramsci about this topic: the experience of turin factory councils (1919-1920) first, and the time after their defeat then.
Common micronutrient deficiencies among food aid beneficiaries: Evidence from refugees in Ethiopia
J Haidar
Ethiopian Journal of Health Development , 2012,
Abstract: Background: Ethiopia is amongst the African countries that have received significant food aid. Nonetheless, the common micronutrient deficiencies among food aid beneficiaries are not well documented. Objective: To find out the common micronutrient deficiencies among food aid beneficiaries in the country based on available data. Methods: Literature search was made from the Internet, peer-reviewed journals, various agency reports, national survey data, books, handouts and Masters in Public Health (MPH) theses since the year 2000. Micronutrient status information for food aid beneficiaries came mainly from studies in refugee/emergency settings, with very few published studies found documenting the nutritional status of non-emergency situations. The information obtained from the above mentioned sources was grouped under the major common micronutrient deficiencies in tabular forms that included the site where the study was conducted, subjects included in the assessment, sample size used, indicators used (clinical, biochemical and dietary) and the findings. Results: Vitamin A and iron deficiencies were the most prevalent micronutrient deficiencies among food aid beneficiaries. Other probable deficiencies prevailing were zinc, vitamins thiamine, riboflavin, niacin folate, cyano-cobalamine, ascorbic acid vitamin D and calcium because of the low intake of dairy products and meat. In some cases, food aid rations provided insufficient quantity and quality of micronutrients, particularly when food aid was a major food source. Some logistic and budgetary constraints were reported as an impediment to assess the micronutrient status of the beneficiaries in field settings. Conclusion: Although the most important deficiencies are identified, the information cannot be generalized to all beneficiaries as their conditions and the types of food donated in emergencies could vary from place to place and therefore the findings should be interpreted contextually. The logistic problem documented underlines the need for seeking collaboration with research institutes and other government agencies whose interests fall in such undertakings. Furthermore, simple dietary assessment, anthropometric measurements and examination of clinical signs need to be considered in the future to assess the major micronutrient deficiencies. [Ethiop J Health Dev. 2011;25(3):222-229]
"Todo hombre en su justo lugar": la "solución" biotipológica al conflicto entre productividad y salud (Argentina, 1930-1955)
Salud Colectiva , 2011, DOI: 10.1590/S1851-82652011000300003
Abstract: one of the ideas in the name of which the connection between wage labor and health/illness is rationalized in the present asserts that there is a beneficial relationship between organizational efficiency and worker health. in contrast to its apparent originality, this articulation is not new at all. between 1930 and 1955 in argentina, a group of physicians upheld that if biotypology programs were implemented in the workplace, it would be possible to improve performance and reduce costs associated with labor accidents and occupational illness, while at the same time looking after and improving the lives of workers. this article analyzes the topics and strategies that formed the occupational biotypology program (such as vocational guidance, personnel selection and human motor surveillance), as well as the objections to the program formulated at the time, as a way to contribute to more contemporary critiques of the rationalities that in the present seek to placate the conflict between company productivity and worker health.
De la disolución a la recreación de la comunidad. Un contrapunto entre Max Weber y Fran ois Perroux
Victoria Haidar
Papeles del CEIC , 2010,
Abstract: En La situación de los trabajadores agrícolas al Este del Elba. Visión General (1892) Max Weber analiza la crisis de la comunidad de intereses que ligaba a los junkers y los aparceros para encontrar en el proyecto de forma-ción de la nación, un antídoto contra las tendencias sociales disolventes. En Capitalismo y comunidad de trabajo (1938) Fran ois Perroux intenta conjurar la cues-tión social y transformar el Estado, inyectando al merca-do una dimensión comunitaria. Ambos autores problema-tizaron la misma falta de organización del trabajo, de un orden que, al vincular a trabajadores y capitalistas en sentidos, prácticas y relaciones comunes restringiera las posibilidades de conflicto. Este artículo circunscribe la respuesta común que Weber y Perroux ofrecieron frente a ese problema, esto es, la cuestión de la comunidad. Así, en los sucesivos apartados se discuten las características y las funciones atribuidas a la comunidad; su relación con el individuo y el papel conferido a la comunidad nacional organizada por el Estado, para plantear, finalmente, algunas conclusiones. / In The situation of agrarian workers at East of the Elbe’s River. General Vision (1892) Max Weber analyses the crisis of the community of interests that relates junkers to peasants to find, in the project to build a nation, a remedy to dissolvent social trends. In Capitalism and labor community (1938) Fran ois Perroux tries to conjure the social question and to transform the State, inject a community dimension to the market. Both authors discuss the same vacuum of work organization, of an order that, relating workers and owners in common meanings, practices and relations, reduce the possibilities of conflicts. The focus of the article is on the common answer that Weber and Perroux offer to this problem, that is, the question of community. Different passages discuss qualities and functions attribute to community; its relation with the individual and the role conferred to the national community organized by the State, so to propose some conclusions.
Die Analyse von Diskursen, die Bestandteil des Regimes der staatlichen Praktiken sind: Eine gouvernementalit tstheoretische Perspektive The Analysis of Discourses Which Form a Part of the Regime of Practices of Governing: A Governmentality Studies Approach El análisis de discursos que forman parte de un régimen de prácticas de gobierno: una aproximación desde la perspectiva de los estudios de la gubernamentalidad
Victoria Haidar
Forum : Qualitative Social Research , 2007,
Abstract: Dieser Artikel diskutiert aus einer Gouvernementalit ts- und diskurskritischen Perspektive die Verbindung zwischen einem "Social Point of View" und der Mobilisierung von Entscheidungstechniken. Dies wird am Beispiel einer diskurskritischen Analyse der Programme des argentinischen Departamento Nacional del Trabajo von 1907 bis 1915 veranschaulicht, auf deren Grundlage Arbeitsrisiken im Rahmen eines liberalen sozialen Programms verwaltet wurden. URN: urn:nbn:de:0114-fqs070287 From the perspective of governmentality studies and a critical discourse analysis this paper looks at the interfaces between a social point of view and the mobilization of techniques of decision making. This is illustrated by the discourse analysis of the program between 1907 and 1915 of the National Department of Work in Argentina through which the governing of risks at work was organized within a liberal rational framework. URN: urn:nbn:de:0114-fqs070287 A partir de la articulación del enfoque de los estudios de gubernamentalidad y el análisis crítico del discurso, en este artículo se muestra como las prácticas discursivas que componían el programa configurado por el Departamento Nacional del Trabajo entre 1907 y 1915 en Argentina, para gobernar los riesgos laborales, tradujeron una racionalidad política liberal en interfase con un punto de vista social y movilizaron preferentemente tecnologías actuariales. URN: urn:nbn:de:0114-fqs070287
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