29 results on '"Razack A."'
Search Results
2. Educational approaches for social accountability in health professions training: a scoping review protocol
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Marco Zaccagnini, Erin Cameron, Roger Strasser, Saleem Razack, and Tim Dubé
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Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Published
- 2024
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3. Experimental and Statistical Study of Flexural Strength in Concrete using Novel Kaolinite Coal
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Ayampalayam Nanjappan Swaminathen, Manogaran Siva, Alphonse Belin Jude, Balasubramanian Hemalatha, and Razack Nasar Ali
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novel kaolinite coal ,m30 grade ,concrete beam ,flexural strength ,sustainable material ,Environmental sciences ,GE1-350 - Abstract
The purpose of this research is to measure the flexural strength of both traditional and newly modified concrete beams with kaolinite coal added. Two sets of eighteen samples each were ready for the data collection. Two sets of specimensare prepared: 18 specimens of one set using modified concrete that has been treated with kaolinite coal, and the other set of 18 specimens using traditional concrete beams. The preparation and examination of the samples involved the use of flexural strength test equipment. The beam specimen size was taken as 100 x 100 x 500mm. The SPSS software version 29 has been utilized to conduct the independent sample T-test. The statistical analysis included Levene's test for equality of variances and a t-test for equality of means to assess the flexural strength of two groups. Levene's test revealed a significant difference in variances between the groups (F=2.909, p=0.097). Subsequently, the t-test assuming equal variances indicated a highly significant difference in means (t=-16.954, df=34, p=0.000). The mean difference in flexural strength was -1.43578, with a standard error of 0.08469 and a 95% confidence interval ranging from -1.60788 to -1.26367. The t-test assuming unequal variances corroborated the significant difference in means (t=-16.954, df=29.822, p=0.000), with a consistent mean difference and confidence interval. The modified concrete beam sample with kaolinite coal added has a mean flexural strength of 4.75 N/mm2, while the standard concrete beam sample has a mean flexural strength of 2.73 N/mm2.
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- 2024
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4. Experimental and Statistical Study of Flexural Strength in Ternary Blended High-Performance Concrete using Alcofine
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Durga Maligi, Sujaatha Anbuchozhan, Ramakrishnan Subramaniam, Harishankar Sooriakumar, and Nasar Ali Razack
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ternary blended concrete ,alcofine ,flexural strength ,comparative analysis ,statistical study ,Environmental sciences ,GE1-350 - Abstract
The primary aim of this research is to conduct a comprehensive comparative experimental and statistical study on the flexural strength of a novel ternary blended high-performance M30 grade concrete incorporating 20% Alcofine in comparison to traditional concrete.The components employed in the experimental investigation of high-performance M30 concrete incorporating Alcofine, in contrast to conventional concrete, comprise cement, fine aggregate, coarse aggregate, water, Alcofine, and additional cementitious materials like fly ash and silica fume. The Flexural Strength of high-performance M30 concrete containing Alcofine significantly influences the performance of concrete structures, rendering it a critical mechanical property for examination in the comparative analysis. The mean flexural strength of the Conventional Concrete group measured 8.1111 N/mm^2, with a standard deviation of 0.75840 and a standard error of the mean of 0.17876. In contrast, the Ternary Blended Concrete group exhibited a higher mean flexural strength of 12.5000 N/mm^2, coupled with a larger standard deviation of 2.09341 and a standard error of the mean of 0.49342. The statistical power analysis, involving parameters such as alpha (α) and beta (β), with commonly used values of 0.05 or 0.01, indicates a significance level of 5% or 1%, respectively. Further research could delve into refining the optimal percentage of Alcofine and exploring its long-term performance under varying environmental conditions. Keywords: Ternary Blended Concrete; Alcofine; Flexural Strength; Comparative Analysis; Statistical Study
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- 2024
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5. Anti-racism in CanMEDS 2025
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Kannin Osei-Tutu, Nathalie Duchesne, Cheryl Barnabe, Lisa Richardson, Saleem Razack, Brent Thoma, and Jerry M Maniate
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Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Published
- 2023
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6. Equity, diversity, inclusion, and social justice in CanMEDS 2025
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Cheryl Barnabe, Kannin Osei-Tutu, Jerry M Maniate, Saleem Razack, Brian M Wong, Brent Thoma, and Nathalie Duchesne
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Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Published
- 2023
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7. The Community Health and Social Medicine Incubator: a service-learning framework for medical student-led projects
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David-Dan Nguyen, Kacper Niburski, Brianna Cheng, Koray Demir, Andrew Dixon, Owen D Luo, Julie de Meulemeester, Anne XL Nguyen, David Paterson, Mathew Thomson, Anna de Waal, Liz Singh, Kristin Hendricks, and Saleem Razack
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Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Abstract
Implication Statement The Community Health and Social Medicine (CHASM) Incubator is a social impact venture that gives medical and other health care students the opportunity to develop initiatives that sustainably promote health equity for, and in partnership with, community partners and historically marginalized communities. Students learn how to develop projects with project management curricula, are paired with community health mentors, and are given seed micro-financing. As the first community health incubator driven by medical students, CHASM provides a framework for students interested in implementing sustainable solutions to local health disparities which extends the service-learning opportunities offered in existing curricula.
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- 2021
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8. Black students applying and admitted to medicine in the province of Quebec, Canada: what do we know so far?
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Jean-Michel Leduc, Victoire Kpadé, Samantha Bizimungu, Martine Bourget, Isabelle Gauthier, Christian Bourdy, Estelle Chétrit, and Saleem Razack
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Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Abstract
To address the underrepresentation of Black students in medical schools in Canada and identify barriers in selection processes, we compare data from the latest Canadian census to that of an exit-survey conducted after a situational judgment test (Casper) among medical school applicants and from questionnaires done after selection interviews in Quebec, Canada. The proportion of Black people aged 15-34 years old in Quebec in 2016 was 5.3% province-wide and 8.2% in the Montreal metropolitan area. The proportion in the applicant pool for 2020 in Quebec was estimated to be 4.5% based on Casper exit-survey data. Comparatively, it is estimated that Black people represented 1.8% of applicants invited to admission interviews and 1.2% of admitted students in Quebec in 2019. Although data from different cohorts and data sources do not allow for direct comparisons, these numbers suggest that Black students applying to medical school are disproportionately rejected at the first step compared to non-Black students. Longitudinal data collection among medical school applicants will be necessary to monitor the situation. Further studies are required to pinpoint the factors contributing to this underrepresentation, to keep improving the equity of our selection processes.
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- 2021
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9. The personal calculus of moral reasoning and identity in global health professions work
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Saleem Idris Razack
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Global Health Professions Education ,Moral Reasoning ,Identity ,Education (General) ,L7-991 ,Medicine (General) ,R5-920 - Abstract
In this personal essay, the author reflects on experiences in global health professions education projects, and the moral reasoning that might be required to define explicitly what constitutes ethical participation. Three interrelated notions are explored: • The decision to engage or not through a discussion of the concepts of safety, understanding power dynamics, and analysis of personal and institutional motivations for the project • The ultimate goals to promote human flourishing and improve equity, through attention to local inequities potentially experienced by either participants or colleagues from home. • Attention to the personal transformative potential of participation in global health professions projects. A framework for exploring moral reasoning in global health professions education work using these three concepts is presented as one that the author has found helpful in his own work in global health professions education.
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- 2017
10. Approche numérique et quantitative de l'étude sur clichés aériens de la fracturation des réservoirs en roches fissurées Numerical and Quantitative Approach to Investigating Fracture Maps of Fissured Reservoirs from Airphotos
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Razack M.
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Chemical technology ,TP1-1185 ,Energy industries. Energy policy. Fuel trade ,HD9502-9502.5 - Abstract
Dans le cadre de la détermination de la structure des réservoirs en roches fissurées, une méthodologie de traitement numérique et quantitative de la fractu-ration relevée sur clichés aériens a été mise au point. La numérisation du relevé est obtenue par digitalisation sur un lecteur de courbes. Cette information est ensuite traitée à l'aide d'un algorithme (programme RAFRAC) qui permet d'identifier numériquement la fracturation par un ensemble de para-mètres élémentaires (orientation, longueur , densité...) à partir desquels il devient possible de procéder à une analyse approfondie du champ de fractures considéré. Un exemple d'application est présenté à propos de l'étude de la fracturation d'une zone à structure tabulaire (Causse du Larzac). Ces premiers résultats tendent à mettre en évidence une double nature mathématique de l'information analysée aléatoire d'une part, déterministe d'autre part. On montre également, à partir de la théorie desvariables régionalisées, que la fracturation suit une certaine logique dans sa répartition spatiale. Par ailleurs une organisation des familles de fractures a pu être mise en évidence, sur laquelle la structure géométrique du réservoir sous-jacent s'ajuste de façon très proche. As part of efforts ta determine the structure of reservoirs in fissured rocks, a numerical and quantitative processing methodology has been developed for mapping fractures with airphotos. The survey is digitized on a curve reader. This data is then processed by means of an algorithm (RAFRAC program) sa as ta numerically identify fracturing by a set of elementary parameters (direction, length, density, etc.) which con be used ta make an in-depth analysis of the fracture field being considered. A sample application is described having ta do with the surveying of the fracturing in a tabular structure (Causse plateau of Larzac). These initial results tend to reveol a dual mathematical nature forthe information analysed : (i) random and (ii) deterministic. The theory of regionalized variables is also used ta show that fracturing follows a certain logic in its spatial distribution. Likewise, an organization of fracture families was revealed, on which the geometric structure of the underlying reservoir fits quite well.
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- 2006
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11. Comportement d'une source karstique soumise à une sécheresse prolongée : la source Bittit (Maroc)
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Amraoui, Fouad, Razack, Moumtaz, and Bouchaou, Lhoussaine
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- 2004
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12. Arguments en faveur d'une norme canadienne pour l'intégration des enjeux 2SLGBTQIA+ dans les études de médecine.
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Schreiber, Miranda, Ahmad, Tehmina, Scott, Michael, Imrie, Kevin, and Razack, Saleem
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- 2021
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13. Promoting Cultural Awareness: A Faculty Development Workshop on Cultural Competency
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Franco A. Carnevale, Yvonne Steinert, Mary Ellen Macdonald, and Saleem Razack
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business.industry ,030503 health policy & services ,media_common.quotation_subject ,Reflective practice ,05 social sciences ,03 medical and health sciences ,Nursing ,Scale (social sciences) ,Multiculturalism ,0502 economics and business ,Medicine ,Faculty development ,Thematic analysis ,0305 other medical science ,business ,Cultural competence ,050203 business & management ,General Nursing ,media_common - Abstract
An interdisciplinary faculty development workshop on cultural competency (CC) was implemented and evaluated for the Faculty of Medicine at McGill University. It consisted of a 4-hour workshop and 2 follow-up sessions. A reflective practice framework was used. The project was evaluated using the Multicultural Assessment Questionnaire (MAQ), evaluation forms completed by participants, and detailed field notes taken during the sessions. The workshop was attended by 49 faculty members with diverse professional backgrounds. Statistically significant improvements were measured using the MAQ. On a scale of 1 to 5 (5 = very useful) on the evaluation form, the majority of participants (76.1%) gave the workshop a score of 4 or 5 for overall usefulness. A thematic analysis of field-note data highlighted participant responses to specific activities in the workshop. Participants expressed a need for faculty development initiatives on CC such as this one.Les auteurs ont présenté et évalué une formation interdisciplinaire sur les compétences culturelles (CC) s'adressant au corps professoral de la Faculté de médecine de l'Université McGill. Le projet consistait en un atelier de quatre heures et deux séances de suivi. Il a été évalué au moyen du Multicultural Assessment Questionnaire (MAQ), de formulaires d'évaluation remplis par les participants et de notes détaillées prises lors des séances. La formation a été suivie par 49 professeurs aux antécédents professionnels variés. Le MAQ a permis de relever une amélioration notable des compétences. Sur le formulaire d'évaluation, la majorité des participants (76,1 %) ont accordé à l'utilité globale de la formation une note de 4 ou 5 (sur une échelle de 1 à 5, 5 = très utile). Une analyse thématique des notes d'observation a permis de mettre en lumière les réactions à l'égard d'activités précises. Les participants ont exprimé le besoin de suivre des activités de formation professionnelle sur les CC comme celle-ci.
- Published
- 2018
14. Télédétection radar, analyse statistique et multicritère appliquées à l’étude de la productivité en eau souterraine et de la vulnérabilité à la pollution des aquifères fissurés du département de Bongouanou, Côte d’Ivoire
- Author
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Assemian, Assie Emile, Adja, Germain Messian, Koudou, Aimé, Therrien, Rene, Razack, Moumtaz, Lacaze, Bernard, Département de Géographie,Université Alassane Ouattara de Bouaké, Université Alassane Ouattara, Département des Sciences et Technologie, section des Sciences de la Vie et de la Terre, École normale supérieure - Abidjan (ENS Abidjan), Département de géologie appliquée, UFR Environnement, Université Jean Lorougnon Guédé (UJloG ), Département de géologie et de génie géologique, Université Laval, 1065 avenue de la Médecine, Québec, Canada, G1V, Université Laval [Québec] (ULaval), Hydrogéologie, Argiles, Sols et Altérations - UMR 6532 (HydrASA), and Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Université de Limoges (UNILIM)
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pollution vulnerability ,radar remote sensing ,Côte d’Ivoire ,[SHS.GEO] Humanities and Social Sciences/Geography ,[SHS.GEO]Humanities and Social Sciences/Geography ,Bongouanou ,hard rock aquifer ,borehole productivity ,productivité ,[SDU.STU.AG] Sciences of the Universe [physics]/Earth Sciences/Applied geology ,télédétection radar ,Ivory Coast ,[SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology ,aquifère du socle ,vulnérabilté à la pollution - Abstract
Extended abstract:The Bongouanou Départment (administrative unit) is located in the humid tropical region of Ivory Coast (Plate 1), where agricultural and pastoral practices are very developed. In this region, the groundwater resource is much exploited. Although the situation is not alarming at this stage, it remains that the quantity and the quality of this resource should be carefully studied also in regards to the increase in diffused and point source pollution. To satisfy the water needs and to prevent the pollution risks, one approach is to improve our knowledge in the aquifers productivity and identify the vulnerable zones. It is for this purpose that this study has been initiated.The lithology is composed of volcano-sedimentary formations (80% of the territory), granitic intrusions (19%) and a small quaternary formation bordering the N'zi and Comoé rivers (Plate 2). Thus, the substratum consists almost entirely of schisteous and granitic basement, with, in its upper part, important indurated layers. There are therefore in this environment reservoirs of alterites and networks of cracks or fractures.To achieve groundwater availability assessment, we used two ENVISAT radar scenes of 12.5 m spatial resolution, VV polarization, from 26/02/2004 and 16/03/2004, taken by the Advanced Synthetic Aperture Radar (ASAR). Speckle filtering of radar images has been done using a Lee filter (Plate 3). Then image enhancement can show morphological discontinuities in the area (Plate 4).Drill parameter statistics provide insight into basement depth slices more productive in groundwater. Indicators designed for the study of spatial productivity are: accessibility and operability The criteria of definition of each indicator are recorded in table 1. The Arcview 3.3 software is a tool with full functionality for performing a multicriteria analysis thanks to its 'Interpolate grid' and 'Map calculator' functions of the 'Spatial Analyst' menu. Thus, at the end of the process, the four thematic classes of water productivity selected after aggregation are: bad, mediocre, good and excellent. From enhanced radar images, lineaments have been extracted and validated through comparison with photofractures derived from the photogeologic map of South-West region of Ivory Coast (Pate 5), and through ground checks. Finally, the fracturation map of Bongouanaou area has been obtained. This map (Plate 6) contains 2897 fractures, with 701 spacing measurements ranging from 0.234 m to 7.42 km for an area of 6670 km2. The fracture lengths range from 0.234 km to 21.23 km, with major fracture directions being: N-S and NW-SE. The cumulative length fracturing density map is shown in Plate 7.Calculations of average induced permeabilities show values ranging from 8.16-10-7 to 9.21-10-5 m.s-1, with an average of 0.91.10-5 m.s-1. A statistical study of average specific flow rates and average flow rates as a function of the total depth of the drilling was carried out and represented by the graphs in plate 8. On plate 8a it is found that the specific flow rates are low at depths less than 40 m and greater than 80 m, with values of less than 0.2 m2.h-1. At depth ranges between 40 and 80 m, the geometric mean specific flow rates are greater than 0.2 m2.h-1, with maxima of 0.57 m2.h-1 and 0.38 m2.h- 1 between 40 and 50 m and between 60 and 70 m. At the level of the average flow rates versus depths (Plate 8b), the depth range with high mean flows is between 40 and 80 m, with also maxima between 40 - 50 m and 70 - 80 m. Depth classes with high specific flows correspond to significant average flows. It can be remembered that in this basement the hydrodynamic characteristics (transmissivity, specific flow and permeability) are important between the depths between 40 and 80 m, with very sensitive peaks between 40 to 50 m and 60 to 70 m. Strong hydraulic properties at depths between 70 and 80 m are likely to be due to very deep fractures of tectonic origin.A study of the relationships between the specific flows and the exploitation rates is carried out and represented by the graph of plate 9. There is a strong correlation between the logarithmic values of these two parameters. The mathematical function describing this relationship is:Q / s = 0.089 Q 1.53with Q / s : specific flow rate (m2.h-1) Q: operating rate (m3.h-1) From this relationship, it is obvious that areas with high flows correspond to high hydraulic characteristics or high porosities. The potentially productive depth range in groundwater in this basement is therefore between 40 and 80 m, with a very remarkable peak in the 40 and 50 m interval. What are the regions concerned by these depths? On the accessibility map, North-West, South-West, North and Central-East, precisely the regions of Tiémelékro, Anoumaba, M'batto, Assié-Koumassi and Arrah offer good and excellent accessibility (plate 10). Regions of good and excellent exploitability also coincide with areas with high fracturing densities. Areas of good groundwater productivity generally provide significant flows at relatively shallow depths. Fractures and alteration affect the upper part of the substratum more than the deep part. A very high thickness of alteration (> 60 m thickness) tends to reduce the accessibility and the exploitability of the groundwater of the underlying fissured horizon (Plate 12).The development of the vulnerability map was done by calculating the vulnerability index using the DRASTIC method which integrates seven: the depth of the aquifer (D), the recharge or the effective infiltration (R), the lithology of the aquifer (A), the nature of the soil (S) , the topography or slope (T), the nature of the unsaturated zone (I) and the induced permeability (C). As the study environment is relatively homogeneous, the classification, coding and weighting of the criteria defining the vulnerability indicator are shown in table 2. The DRASTIC (IDRASTIC) indices obtained oscillate between 43 and 154. An approach developed in 1995 by the Quebec Ministry of Agriculture, Fisheries and Food consists of dividing the hydrogeological vulnerability scale into three or four major classes (see table 3).The calculation of the extreme percentages of vulnerability made it possible to obtain the following classification according to the ranges of vulnerability index:- 29%, Le département Bongouanou est situé dans la région tropicale humide de l’Est de la Côte d’Ivoire où la pratique agricole et pastorale est très développée. De plus, la ressource en eau souterraine est très exploitée à cause de la surpopulation. Bien que la situation ne soit pas encore alarmante dans cette région de socle, il n’en demeure pas moins que la quantité et la qualité de cette ressource sont sans cesse mises à l’épreuve, compte tenu de la croissance des sources de pollution, tant diffuses que ponctuelles. Pour satisfaire les besoins en eau et prévenir les risques de pollution, une des approches est la connaissance de sa productivité et l’identification des zones vulnérables. C’est dans ce but que cette étude a été initiée, en croisant l’analyse du réseau de fracturation détecté par les capteurs radar Envisat avec les paramètres de forage, avec des approches statistiques et d’analyse multicritères. Les résultats statistiques montrent que cet aquifère de socle a une productivité en eau souterraine modeste, avec un débit maximum de 21 m3.h-1 et une moyenne de 4,34 m3.h-1. La tranche de profondeur très productive en eau est comprise entre 40 et 80 m. Les cartes d’accessibilité et d’exploitabilité établies par analyse multicritère des facteurs (probabilité de succès des forages, profondeur d’extraction, niveau piézométrique et débits d’exploitation) mettent en évidence les zones très productives. En effet, les secteurs très fracturés et de faibles pentes (zone de plaine) tels que le Sud, l’Est, l’Ouest et le Nord, ont des ressources facilement accessibles et fournissent des débits importants à faibles profondeurs. Toutefois, la méthode DRASTIC, utilisée pour réaliser la carte de vulnérabilité à la pollution, montre des indices très élevés dans ces régions.
- Published
- 2018
15. Lois d'échelle dans la fracturation de roches dures cristallines et dans le réseau hydrographique associé
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Lasm, Théophile and Razack, Moumtaz
- Published
- 2001
- Full Text
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16. ETUDE EXPERIMENTALE ET MODELISATION NUMÉRIQUE DES TRANSFERTS HYDRIQUES ET DE SOLUTE DANS UN MILIEU POREUX NON SATURE-SATURE
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Lemacha, Hassan, Maslouhi, Abdellatif, Razack, Moumtaz, Mghazli, Zoubida, Hecht, Frédéric, Martin, Dominique, Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Equipe d'Ingénierie MAthématique [Kenitra] (EIMA), Département de Mathématiques [Kénitra], Faculté des Sciences [Kenitra], Université Ibn Tofaïl (UIT)-Université Ibn Tofaïl (UIT)-Faculté des Sciences [Kenitra], Université Ibn Tofaïl (UIT)-Université Ibn Tofaïl (UIT), Laboratoire Jacques-Louis Lions (LJLL), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC)
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[SDU.STU] Sciences of the Universe [physics]/Earth Sciences ,[SDU.STU]Sciences of the Universe [physics]/Earth Sciences ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2015
17. The use of remote sensing and multi-criteria analysis for the assessment of grounwater potentialities of an aquifer in a tropical area of West Africa: the case of Bongouanou area, East of Ivory Coast
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Assemian, Assie Emile, Kouame, D. A., Mobio, A. B. H., Kouamelan, A. N., Koudou, A., Kouadio, H. B., Dibi N'Da, Hippolyte, Therrien, R., Razack, Moumtaz, and UFR ds Sciences de la Terre et des Ressources Minières, Univ. Félix Houphouet Boigny, Abidjan, Cote d' ivoire
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Landsat ETM+ ,socle ,Côte d'Ivoire ,télédétection ,fracturation ,underground water ,Bongouanou ,[SHS.GEO]Humanities and Social Sciences/Geography ,Remote sensing ,image radar ,eaux souterraines ,radar image ,nappe aquifère ,basement ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,Ivory Coast ,images Landsat ,[SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology - Abstract
article publié en français, avec un résumé étendu en anglais, et des planches couleur hors-texte; International audience; The aim of the study is to identify highly potentially productive underground water areas, with a low depth, in the adminsitrative unit ("département" of Bondouarou, Ivory Coast. Radar images of Envista, and Landsat 7 ETM+ images have been processed, merged and interpreted to derive the fracturation spatial pattern of the area. Parameters from drillings have been also taken into account. Two multi-criteria analysis have been done, allowing the production of an aquifer potentiality map, following the method of Jourda, et al. (2006) on one hand, and a map od underground water productivity, following the approach of Saley (2003) on the other hand. Results of thes 2 maps are complementary and show that the southern regions of M'batto and Anoumaba (south)), Tiémelékro (west), Assie-Koumassi (north), André and Arrah (east) are poyentially the most productive in ground water.; L'objectif de cette étude est d'identifier les zones à fortes potentialités en eau souterraine, accessibles à faibles profondeurs, dans le département de Bongouanou. Des images radar Envisat et landsat7 ETM+ ont été traitées, fusionnées et interprétées pour extraire les fractures de la zone d'étude. Les paramètres des forages ont été aussi exploités. Leur intégration dans 2 analyses multicritères ont permis de produire d'une part, la carte des potentialités aquifères selon la méthode de JOURDA et al. (2006) et d'autre part, la carte de productivité en eau souterraine selon l'approche de SALEY (2003). Les résultats de ces 2 types de cartes sont complémentaires et montrent que les régions du Sud (M'batto, Anoumaba), de l'Ouest (Tiémelékro) du Nord (Assie-Koumassi) et de l'Est (Andé, Arrah) sont, dans ce milieu fissuré, les zones les plus potentiellement productives en eau souterraine.
- Published
- 2014
18. Quelles aires protégées pour l’Afrique de l’Ouest ?
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Adama Tondossama, Adjibi Oualiou, Abdoul Razack, Adomou, Aristide Cossi, Agathe Fantodji, Alfa Gambari Imorou, Safouratou, Amadou, Bernard Asséréou, Assogbadjo, Achille Ephrem, Baillon, François, Ballouche, Aziz, Bernard Fosso, Boissieu, Dimitri de, Bourgeot, André, Brice Sinsin, C, Crisantos Obama, Chevallier, Damien, Christine Sagno, Claro, Françoise, Codjia, Jean-Claude, Condé, Salif, Crisantos Obama, de Boissieu, Dimitri, Devineau, Jean-Louis, Djego, Julien, Doumnang Mbaigane, Jean-Claude, Egboou, Patricia, Ekué, Marius Rodrigue Mensah, Eva, Hugh, Famara, Drammeh, Faye, Bernard, Floquet, Anne, Fournier, Anne, Galat, Gérard, Galat-Luong, Anh, Gautun, Jean-Claude, Germain Ngandjui, Giazzi, Franck, Grégoire, Jean-Marie, Guedou, Raoul, Guenda, Wendengoudi, Hanon, Laurence, Houndagba, Cossi Jean, Issa, Azizou El-Hadj, Kakpo, Marcel Comlan, Kassa, Barthélémy, Kidjo, Ferdinand Claude, Kiéma, Sébastien, Kpéra, Gnanki Nathalie, Kyelem, Mathias, Lamarque, François, Mahamadou Salifou, Mayaux, Philippe, Mensah, Guy Apollinaire, Millogo-Rasolodimby, Jeanne, Moguedet, Gérard, Mongbo, Roch, Mouhamadou, Inoussa Toko, Moussa Alou, Ngandjui, Germain, Nobimè, Georges, Nomao, Adamou, Nontanovanh, Manoli, Ouédraogo, Paul, Ould Baba, Mohamed Lemine, Ozer, André, Palumbo, Ilaria, Pellé, Eric, Pouclet, André, Sagno, Christine, Sawadogo, Louis, Shalukoma, Chantal, Sinadouwirou, Théophile, Sinsin, Brice, Sissler, Céline, Taïbi, Aude Nuscia, Tchamié, Thiou Tanzidani Komlan Tanzidani Komlan, Tchamié, Thiou Tanzidani Komlan, Tente, Agossou Brice Hugues, Tohinlo, Peggy, Tondossama, Adama, Tubiana, Jérôme, Van der Maesen, Laurentius Josephus Gerardus, Vidal, Max, Wangari, Elizabeth, Worou, Nadine, Yedomonhan, Hounnankpon, and Yehouenou-Tessi, Jean
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RN ,gestion de l’environnement ,protection de l’écosystème ,Area Studies ,Environmental Studies ,SCI026000 ,ressources naturelles ,végétation ,environnement ,faune sauvage - Abstract
Concilier conservation dans les aires protégées et développement des populations locales exige une bonne connaissance de la dynamique des systèmes naturels et sociaux. Issu d’un séminaire interdisciplinaire qui a réuni les partenaires de 16 pays, en majorité africains, ce CD-ROM présente les données biologiques et sociales permettant de questionner les pratiques en cours dans les aires protégées d’Afrique de l’Ouest. Il s’adresse aux scientifiques, aux gestionnaires et aux décideurs. Reconciling conservation in protected areas and development for the local people requires a good knowledge of the dynamics of natural and social systems. The result of an interdisciplinary seminar which brought together participants of 16 countries, mostly African, this work presents biological and social data in support of a re-consideration of the practices in progress in the protected areas of West Africa. It is intended as much for scientists as for managers and decision-makers.
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- 2014
19. Régime alimentaire et habitat du Céphalophe de Grimm, Sylvicapra grimmia, au Bénin
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Adjibi Oualiou, Abdoul Razack, Codjia, Jean-Claude, and Mensah, Guy Apollinaire
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RN ,gestion de l’environnement ,protection de l’écosystème ,Area Studies ,Environmental Studies ,SCI026000 ,ressources naturelles ,végétation ,environnement ,faune sauvage - Abstract
Introduction Les céphalophes sont de petites antilopes de la famille des Bovidés et de la sous-famille des Céphalophinés endémiques en Afrique (Haltenorth et Diller, 1985). Ils regroupent une vingtaine d’espèces parmi lesquelles le céphalophe de Grimm est certainement la plus connue et la plus répandue. Contrairement aux céphalophes de forêt, le céphalophe de Grimm, encore appelé céphalophe de brousse, fréquente une diversité de biotopes allant des lisières forestières aux limites désertiques...
- Published
- 2014
20. Cartographie des accidents géologiques par imagerie satellitaire Landsat-7 ETM+ et analyse des réseaux de fractures du socle précambrien de la région de Bondoukou (nord-est de la Côte d´Ivoire)
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Youan Ta, Marc, Lasm, Théophile, Jourda, Jean Patrice, Kouamé, Koffi Fernand, Razack, Moumtaz, Lacaze, Bernard, Centre Universitaire de Recherche et d'Application en Télédétection , UFR des Sciences de la Terre et des ressources minières (CURAT), Université de Cocody, Laboratoire des Sciences et Techniques de l'Eau et de l'Environnement, U.F.R des Sciences de la Terre et des ressources minières, Hydrogéologie, Argiles, Sols et Altérations - UMR 6532 (HydrASA), and Université de Limoges (UNILIM)-Université de Poitiers-Centre National de la Recherche Scientifique (CNRS)
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Côte d'Ivoire ,Télédétection ,géostatistique ,[SHS.GEO] Humanities and Social Sciences/Geography ,fracturation ,[SHS.GEO]Humanities and Social Sciences/Geography ,statistique ,Remote sensing ,statistics ,[SDU.STU.AG] Sciences of the Universe [physics]/Earth Sciences/Applied geology ,fractures network ,geostatistics ,Ivory Coast ,[SDU.STU.AG]Sciences of the Universe [physics]/Earth Sciences/Applied geology - Abstract
Mapping geological accidents from Landsat 7 ETM+ imagery and analysis of fractures networks of the precambrium substratum of the Bondoukou area (North -East of Ivory Coast). The present study is located in the Northeast of the Côte d'Ivoire (Bondoukou) where fracturing is well developed. The main purpose of this study is to map the fracture networks in the crystalline and metamorphic hard rocks using satellite images ETM+ of Landsat 7 and to characterise them through the statistical and geostatistical methods. Image processing techniques have permitted to improve the structural and linear features contained in the raw satellite images. That permits a better mapping of geological objects. The fracturing map obtained after treatments is very dense and include many lineaments of variable sizes. The validation of these fractures has been made using the existing geological and photo-geological maps and ground observation. The analysis of the fracture networks indicates that fracture length varies, which indicates the heterogeneity of the geological formations.The distribution of fracture length follows power law indicating that the fracture networks of Bondoukou area have reached its optimal stage. The geostatistical analysis shows that the fractures networks of Bondoukou area behaves like a regionalized variable. The omnidirectional variogram of the fracture density is characterized by several structures putting in evidence the structuring at different scales and involving the complexity of these fracture networks. Fracturestructuring is not identical in all the space directions. The sum of the results contributes to a better knowledge of the fracture networks of Bondoukou area., La présente étude porte sur une région située au nord-est de la Côte d'Ivoire (Bondoukou) où la fracturation est bien développée. Elle a pour objectifs principaux de cartographier les réseaux de fractures dans les roches cristallines et métamorphiques à l'aide des images satellitaires Landsat-7 ETM+ et de les caractériser à partir de méthodes statistique et géostatistique. L'ensemble des techniques utilisées a abouti au rehaussement des éléments structuraux et linéaires contenus dans les images brutes, permettant une meilleure cartographie des accidents géologiques. La carte linéamentaire obtenue après les traitements est très dense et comporte des linéaments (discontinuités images) de tailles variables. La validation de ces différentes structures linéaires a été faite sur la base des cartes géologiques et photogéologiques existantes et des connaissances de terrain. L'analyse des réseaux de fractures indique que leur longueur s'échelonne sur trois ordres de grandeur mettant en évidence l'hétérogénéité des formations géologiques. La distribution des longueurs de fractures suivant la loi de puissance souligne que les réseaux de fractures de la région de Bondoukou auraient atteint un stade de développement avancé. L'analyse géostatistique souligne que la densité de fracturation se comporte comme une variable régionalisée. Le variogramme de la fracturation tous azimuts est caractérisé par plusieurs structures emboîtées mettant en évidence la structuration à différentes échelles et impliquant la complexité de ces réseaux. La structuration des familles de fractures n'est pas identique dans les différentes directions de l'espace. L'ensemble des résultats contribue à une meilleure connaissance des réseaux de fractures de la région de Bondoukou.
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- 2008
21. Behaviour of a karstic spring subjected to a long drought period: Bittit spring (Morocco)
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Amraoui, Fouad, Razack, Moumtaz, and Bouchaou, Lhoussaine
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- *
DROUGHTS , *GEOLOGY , *NATURAL disasters , *EARTH sciences , *NATURAL history - Abstract
The behaviour of a karstic spring (Bittit spring, Middle Atlas, Morocco) subjected to a prolonged drought (>20 yr), is analysed using spring hydrographs analysis methods and correlation and spectral methods. Two series of discharges, corresponding to a normal rainfall period and a drought period, are analysed. The results show that the karstic system is inertial, with very significant storage. However, in spite of the great regulating capacity of the storage, the long drought period significantly reduced the spring discharges, due to less diversified inputs, and to the karstic system storage depletion. To cite this article: F. Amraoui et al., C. R. Geoscience 336 (2004). [Copyright &y& Elsevier]
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- 2004
- Full Text
- View/download PDF
22. Eléments en faveur d'une karstification anté-oligocène supérieur dans le Narbonnais
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Henri Salvayre and Moumtaz Razack
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Corbières ,Fracturation ,karst noyé sous couverture ,Karstiflcation anté-Oligocène supérieur ,Narbonnais ,Remplissage ,Stratigraphy ,Paleontology ,Geology - Abstract
A drowned karst located in limestones of superior Jurassic, under a covering of superior Oligocene, was revealed by hydrogeological researches carried out by one of us (M.R.). Elements from the filling of the karst were brough up during the cleaning by air-lift of the exploitation well. Their analysis together with observations made in a natural cave situated in the neighbourhood, lead us to attribute an oid age (ante-superior Oligocene) to the karstiflcation period of the Jurassic limestones., Des recherches hydrogéologiques effectuées par l'un de nous (M.R.) en 1976, au Nord-Ouest de Narbonne, ont abouti à la mise en évidence d'un karst noyé dans des calcaires du Jurassique supérieur sous un recouvrement datant de l'Oligocène supérieur. L'analyse d'éléments de remplissage du karst, remontés au cours du nettoyage du forage d'exploitation par emulsion, conjointement avec des observations effectuées dans une cavité pénétrable située à proximité, nous ont permis d'attribuer un âge ancien (anté-Oligocène supérieur) à la période de karstiflcation des calcaires jurassiques., Razack Moumtaz, Salvayre Henri. Eléments en faveur d'une karstification anté-oligocène supérieur dans le Narbonnais. In: Géologie Méditerranéenne. Tome 7, numéro 2, 1980. Géologie générale. pp. 187-191.
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- 1980
23. Modélisation et auto-commutation de moteurs synchrones
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Osseni, Razack and Jufer, Marcel
24. Approche hydrogéochimique et structurale des circulations dans un réservoir du domaine alpin (massif d'Allevard, France)
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M. Razack and J. Dazy
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Water Science and Technology - Abstract
Les caractéristiques hydrogéochimiques des réservoirs profonds du domaine alpin occidental sont abordées par le biais du système hydrominéral d'Allevard (France). Le volume des données et la variabilité des caractéristiques qui en découle, permettent de considérer cette source comme un exemple représentatif des sources thermominérales du domaine alpin occidental. L'étude combinée de ces données relatives à l'hydrochimie, à la géochimie isotopique, à la présence de gaz et d'éléments traces, confrontées au contexte fissural et structural des réservoirs, permet une approche cohérente des circulations profondes.On propose en conclusion un modèle qui pourrait être généralisé aux systèmes thermominéraux situés dans un contexte structural comparable (front de chevauchement des massifs cristallins externes; front de chevauchement briançonnais) et présentant un faciès semblable (eaux chloro-sulfatées). Ce modèle tient compte de mélanges entre eaux d'origine superficielle et/ou semi-profondes et d'eaux d'origine profonde., Investigations of the hydrogeochemical and structural characteristics of groundwater flows in an Alpine hydrothermal reservoir (Allevard Massif, French Western Alps) are carried out in order to define the origin and genesis of thermal and mineral waters.The geological formations constituting the Allevard Massif consist of a Hercynian basement and a continuous sedimentary cover from Carboniferous to Middle Jurassic. The basement is composed mainly of micaschists, the sedimentary cover of Paleozoic clastic deposits : Triassic formations (evaporites, dolomites, limestones); Liassic calcareous marls, schistics marls and Limestones. A groundwater outlet (Allevard Spring) from this reservoir is located in the calcareous terrains of Lias.The basement-cover contact is a major N40 subvertical fault. Faulting tectonics and subsequent rock fracturing is important for the hydrogeology of the area under study since the geological formations are initially impermeable (except for the Triassic terrains). Observations of underground galleries in the neighbourhood of the spring showed the presence of water outflows located on N40 strike-slip faults affecting both the basement and the Liassic terrains. The role of faulting tectonics in groundwater occurrence is indeed clearly emphasized by the position of the Allevard Spring at the intersection of two major faults with N60 and N140 trends.Available data cover nearly a hundred years (1888-1930) and emphasize the great variability of the chemical features of the spring water. This is related to the tact that the water outflowing from the spring is a mixture in varying proportions of waters from different sources. Combined interpretation of the structural characteristics, isotopical (3H; 18O; 2H; 34S) and chemico-physical (major and trace elements, gases, temperature, ...) data provides the basis of a working assumption on a flow and mixing model in which three different hydrogeological subsystems were distinguished : a surface subsystem comprising cold infiltration waters of a bicarbonate-calcium and a sulfate-calcium type; a subsurface subsystem constituted by the fissured Liassic calcareous terrains comprising part of the infiltrated waters which intermingle with much warmer waters of a sodium-chloride type originating from a subsystem located at a great depth. By means of geochemical indicators, a depth of nearly 4000 m has been estimated.Such a model, in agreement with geological evidence and reported by some recent works showing that halite deposits are probable at great depths, could be generalized to other hydrothermal systems occurring within the framework of the French Western Alps in a comparable structural context (thrust front of the external metamorphic massifs; "Briançonnais" thrust front).
25. Les Mini Entrevues Multiples pour la sélection de candidats en otorhinolaryngologie et chirurgie cervico-faciale.
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Campagna-Vaillancourt, Maude, Nguyen, Lily H. P., Manoukian, John J., and Razack, Saleem
- Abstract
Copyright of Pédagogie Médicale is the property of EDP Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2013
- Full Text
- View/download PDF
26. Possibilités statistiques de prédiction des propriétés aquifères à l'aide des paramètres géoélectriques en milieu sédimentaire fortement hétérogène, Plaine du Haouz, Maroc
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Razack, M. and Sinan, M.
- Published
- 1988
- Full Text
- View/download PDF
27. Évolution spatio-temporelle d'un aquifère alluvial sous l'effet d'une sécheresse pluriannuelle exceptionnelle (littoral Méditerranéen, Hérault, France)
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Grillot, J.C. and Razack, M.
- Published
- 1985
- Full Text
- View/download PDF
28. Étude de l'effet de marée océanique sur un aquifère carbonate cotier (Miocène de l'algarve — Portugal)
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Razack, M., Drogue, C., Romariz, C., and Almeida, C.
- Published
- 1980
- Full Text
- View/download PDF
29. Effets de la variation spatiale et temporelle des propriétés des terrains sur les défaillances des réseaux enterrés
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GUEKIE SIMO, Aubin Thibaut, Breysse, Denys, Marache, Antoine, Lastennet, Roland, Litrico, Xavier, Le Gat, Yves, Mudry, Jacques-Noël, and Razack, Moumtaz
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Perméabilité ,Casses de canalisations ,Assainissement ,Gestion patrimoniale ,Géostatistiques ,Modélisation hydrogéologique ,Nappe phréatique ,Visual Modflow ©
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