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Search Results: 1 - 10 of 813632 matches for " L. A-M. Hanna "
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On the classification of the Lie algebras
L. A-M. Hanna
International Journal of Mathematics and Mathematical Sciences , 2004, DOI: 10.1155/s016117120430222x
Abstract: The Lie algebras Lr,ts introduced by the author (2003) are classified from an algebraic point of view. A matrix representation of least degree is given for each isomorphism class.
Simulation of the thermal borehole resistance in groundwater filled borehole heat exchanger using CFD technique
A-M. Gustafsson, L. Westerlund
International Journal of Energy and Environment , 2010,
Abstract: The thermal borehole resistance in a groundwater-filled borehole heat exchanger (BHE) is affected of both conductive and convective heat transfer through the borehole water. To calculate this heat transport, different models are required compared to calculation of only conductive heat transfer in a back-filled BHE. In this paper some modelling approximations for groundwater-filled, single U-pipe BHEs were investigated using a 3D CFD model. The purpose is to find approximations that enable to construct a fast, simple model including the convective heat transfer that may be used in thermal response test analyses and BHE design programs. Both total heat transfer calculations (including convective and conductive heat transport) and only conductive heat transfer calculations were performed for comparison purposes. The approximations that are investigated are the choice of boundary condition at the U-pipe wall and using a single pipe in the middle of the borehole instead of the U-pipe. For the total heat transfer case, it is shown that the choice of boundary condition hardly affects the calculated borehole thermal resistance. For the only conductive heat transfer case, the choice of boundary condition at the pipe wall gives large differences in the result. It is also shown that using an annulus model (single pipe in the middle of the borehole) results in similar heat transfer as the U-pipe model provided that the equivalent radius is chosen appropriately. This approximation can radically decrease the number of calculation cells needed.
Assessment of fluoride intake and prescription in children of Eastern France. Their dental status
Joseph N,Perreau T,Musset A-M,Brisset L
Pratiques et Organisation des Soins , 2008,
Abstract: Aims: Three Eastern French regions decided to assess the practice of use and prescription of systemic fluoride according to the French agency for medical safety of health products (AFSSAPS) and World Health Organization (WHO) references and the medico-economic and public health issues. The oral health of the study population was assessed.Methods: A fluoride intake assessment of a sample of 0-12 year old children was generated. A specific tool was especially drawn up for this study. It enabled to calculate the fluoride intake of 4-12 year olds during an examination carried out by practitioners of publichealth. The data about fluoride prescription and oral/dental status of this cohort were collected among their prescribers, families or children.Results: The fluoride intakes were lower than the recommended doses from Afssaps/WHO in 86% of children aged zero to three, 33,6% of 4-12 year old children with prescription and 56% of children aged 4-12 without prescription. According to the families, 42% of the children were not following prescribed systemic fluoride drugs costed 622,000 euros to the health insurance in these three regions. Furthermore, only 45% of 12 year old children had no caries and more than 20% had 4 decayed, missing or filled teeth, with an average of two to three surfaces being affected.Conclusion: Carrying out an optimal fluoroprophylaxis is intricate and unadequately handled by the various actors. The lack of information about the fluoride rate in bottled and tap water may be a source of explanation.Prat Organ Soins 2008;39(4):297-309
Medical student participation in community-based experiential learning: reflections from first exposure to making the diagnosis
D Cameron, L Wolvaardt, M Van Rooyen, J Hugo, J Blitz, A-M Bergh
South African Family Practice , 2011,
Abstract: Background: Fifth-year medical students from the University of Pretoria participated in a four-week rotation in the primary care clinics of a large metropolitan centre. An academic service-learning (ASL) approach was introduced into this rotation to improve the integration of theoretical learning and clinical practice through relevant community service and structured reflection. Methods: Students wrote semi-structured reflective journals as a means to gaining greater insight into their learning experiences. These reflections were analysed qualitatively with a view to improving the community-based curriculum. Results: Four major themes were identified: expectations and the reality of primary care; service and learning; becoming a doctor; and making a difference. Conclusion: While students gained a deeper insight into their development as clinicians, using an ASL approach also assisted the faculty in making an informed educational diagnosis of the curriculum.
The development of a strategy for the facilitation of income-generating projects in rural communities: an insider account
A-M Trollip
Journal of Family Ecology and Consumer Sciences /Tydskrif vir Gesinsekologie en Verbruikerswetenskappe , 2001,
Abstract: Die grondslae en ontwikkeling van 'n strategie vir die fasilitering van inkomstegenererende kunshandwerkprojekte in landelike gemeenskappe word kortliks uiteengesit. Die uiteensetting berus op gegewens wat verkry is tydens twee opeenvolgende fases van 'n navorsingsprojek in die Noordelike Provinsie van die Republiek van Suid-Afrika. Drie projekte wat sonder, en drie wat onder die leiding van een of meer fasiliteerders gefunksioneer het, is in die eerste fase van die navorsing bestudeer. Faktore wat doeltreffende funksionering inhibeer is ge dentifiseer en die rol en funksie van projekfasiliteerders is ondersoek. 'n Aktiwiteitsmodel vir die fasilitering van inkomstegenererende projekte is op grond van die navorsingsresultate en aan die hand van die prestasiemodel van Blumberg en Pringle (1982; aangepas deur Robbins, 1993) ontwikkel. Gedurende die tweede fase van die navorsing is daar by die aktiwiteite van 'n inkomstegenererings - projek in die Winterveldt naby Pretoria ingeskakel. Die eerstehandse insig wat so verkry is, is gebruik om die voorgenoemde aktiwiteitsmodel te verfyn. Daar is tot die gevolgtrekking gekom dat 'n ontwikkelingstrategie voorsiening moet maak vir die ontwikkeling van menslike hulpbronne en dat die konteks waarbinne projekte funksioneer deurentyd in ag geneem moet word. Die doeltreffende funksionering van projekte word deur velerlei sosiokultu - rele en ander faktore ge nhibeer. Dit is ook noodsaaklik dat daar van owerheidswe inligtings - en ander hulpstrukture geskep en in stand gehou moet word om mikro-ondernemings te ondersteun om winsgewend te funksioneer.
Editorial
Malik A-M
Pratiques et Organisation des Soins , 2010,
Abstract: L’Association latine pour l’analyse des systèmes de santé (ALASS) a des objectifs d’échanges scientifiques et de formations de réseaux entre professionnels de différents pays latins, d’Europe, des Amériques et d’Afrique. Les thèmes de recherche et de débat de ses membres sont principalement les maladies chroniques, la santé mentale, les ressources humaines, la décentralisation, la qualité des soins, la planification, la gestion, le financement et tous les sujets concernant la pratique et l’organisation des soins.C’est aussi un espace d’échanges multiprofessionnels entre des médecins, des infirmiers et d’autres professionnels des soins, aussi bien que des gestionnaires, des économistes et des juristes. Chaque sujet est discuté sous des points de vue différents, dans un esprit de respect mutuel. Le résultat de ces discussions est souvent une synthèse où tous les participants se retrouvent.Ce numéro spécial de la revue Pratiques et organisation des soins présente six articles issus de communications du Congrès de 2009 de l’ALASS qui s’est tenu au Luxembourg. Ces articles ont été sélectionnés par un comité de lecture issu de l’association 1.Le premier article, écrit par des universitaires de Mexico, montre une relation entre le niveau de financement public de la santé et la distribution des revenus dans la population, ainsi que les taux de mortalité maternelle et infantile. Ce thème n’est pas nouveau, mais avec les nouvelles technologies, il faut revenir vers les hypothèses considérées confirmées et les réexaminer.Le deuxième vient du groupe hospitalier Lariboisière-Fernand Vidal (Assistance publique – H pitaux de Paris). L’article identifie les causes de la surprescription d’actes de biologie à l’h pital et propose des pistes d’amélioration. Il s’agit là d’une préoccupation constante des gestionnaires et il est opportun d’en faire une analyse objective sur des données réelles. Le troisième avance l’hypothèse que les professionnels de la santé ont une formation et des attitudes normatives. Cet article montre qu’il est possible d’échanger entre pays assez différents : les auteurs sont deux brésiliennes et une canadienne.Dans le quatrième, un ma tre de conférence de l’Université de Rennes (France) et des cadres soignants hospitaliers, identifient les systèmes de valeurs des patients et des soignants. Ces systèmes aident à comprendre les déterminants de l’autonomisation du patient.En Suisse, où la prise en charge hospitalière est d’une durée plafonnée, le Centre hospitalier universitaire de Lausanne étudie les variables liées à la durée de séjour. Les résultat
Alteration of superconductivity of suspended carbon nanotubes by deposition of organic molecules
M. Ferrier,A. Yu. Kasumov,V. Agache,L. Buchaillot,A-M. Bonnot,C. Naud,V. Bouchiat,R. Deblock,M. Kociak,M. Kobylko,S. Gueron,H. Bouchiat
Physics , 2005, DOI: 10.1103/PhysRevB.74.241402
Abstract: We have altered the superconductivity of a suspended rope of single walled carbon nanotubes, by coating it with organic polymers. Upon coating, the normal state resistance of the rope changes by less than 20 percent. But superconductivity, which on the bare rope shows up as a substantial resistance decrease below 300 mK, is gradualy suppressed. We correlate this to the suppression of radial breathing modes, measured with Raman Spectroscopy on suspended Single and Double-walled carbon nanotubes. This points to the breathing phonon modes as being responsible for superconductivity in carbon nanotubes.
Predictors of Discharge to Home after Thrombolytic Treatment in Right Hemisphere Infarct Patients
E-I. Ruuskanen, M. Laihosalo, JE. Kettunen, H. Losoi, L. Nurmi, A-M. Koivisto, P. Dastidar, J. Ollikainen and M. Jehkonen
Journal of Central Nervous System Disease , 2012, DOI: 10.4137/JCNSD.S6411
Abstract: Background: The aim of the study was to assess the association between thrombolysis and length of hospital stay after right hemisphere (RH) infarct, and to identify which cognitive functions were predictive of discharge. Methods: The study group consisted of 75 acute RH patients. Thirty-three patients had thrombolysis. Neuropsychological examinations were performed within 11 days of stroke onset. The cognitive predictors were visual neglect, visual memory, visual search and reasoning and visuoconstructive abilities. The outcome variable was time from stroke to discharge to home. Results: Thrombolysis emerged as a statistically significant predictor of discharge time in patients with moderate/severe stroke (NIHSS 5). In the total series of patients and in patients with mild stroke (NIHSS <5), thrombolysis was not significantly associated with discharge time. Milder visuoconstructive defects shortened the hospital stay of the whole patient group and of patients with moderate/severe stroke. In all patient groups, independence in activities of daily living (ADL) was a significant single predictor of a shorter hospital stay. The best combination of predictors for discharge was independence in ADL in the total series of patients and in patients with mild stroke, and thrombolysis and independence in ADL in patients with moderate/severe stroke. Conclusions: Thrombolytic treatment was a significant predictor of earlier discharge to home in patients with moderate/severe RH infarct, while cognitive functions had less predictive power.
The young, tight and low mass binary TWA22AB: a new calibrator for evolutionary models ? Orbit, spectral types and temperatures determination
M. Bonnefoy,G. Chauvin,C. Dumas,A-M. Lagrange,H. Beust,M. Desort,R. Texeira,C. Ducourant,J-L. Beuzit,I. Song
Physics , 2009, DOI: 10.1051/0004-6361/200810921
Abstract: Tight binaries discovered in young, nearby associations, with known distances, are ideal targets to provide dynamical mass measurements to test the physics of evolutionary models at young ages and very low masses. We report for the first time the binarity of TWA22, possible new dynamical calibrator for evolutionary models at young ages. Based on an accurate trigonometric distance (17.53 +- 0.21 pc) determination, we infer a total dynamical mass of 220 +- 21 MJup for the system. From the resolved near-infrared integral-field spectroscopy, we find an effective temperature Teff=2900+200-200 K for TWA22 A and Teff=2900+200-100 K for TWA22 B and surface gravities between 4.0 and 5.5 dex. From our photometry and a M6 +- 1 spectral type for both components, we find luminosities of log(L/Lsun)=-2.11 +- 0.13 dex and log(L/Lsun)=-2.30 +- 0.16 dex for TWA22 A and B respectively. By comparing these parameters with evolutionary models, we question the age and the multiplicity of this system. We also discuss a possible underestimation of the mass predicted by evolutionary models for young stars close to the substellar boundary.
Adaptive optics imaging survey of the Tucana-Horologium association
G. Chauvin,M. Thomson,C. Dumas,J-L. Beuzit,P. Lowrance,T. Fusco,A-M. Lagrange,B. Zuckerman,D. Mouillet
Physics , 2003, DOI: 10.1051/0004-6361:20030352
Abstract: We present the results of an adaptive optics (AO) imaging survey of the common associations of Tucana and Horologium, carried out at the ESO 3.6m telescope with the ADONIS/SHARPII system. Based on our observations of two dozen probable association members, HIP 1910 and HIP 108422 appear to have low-mass stellar companions, while HIP 6856 and GSC 8047-0232 have possible sub-stellar candidate companions. Astrometric measurements, performed in November 2000 and October 2001, indicate that HIP 1910 B likely is bound to its primary, but are inconclusive in the case of the candidate companion to HIP 6856. Additional observations are needed to confirm the HIP 6856 companionship as well as for HIP 108422 and GSC 8047-0232.
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