showing 36 of ~574560 from 574555 documents
Évaluation des activités de rééducation GAPP à l'école primaire
1991
International audience; Les GAPP (groupes d'aide psycho-pédagogique, transformés récemment en réseaux d'aide) ont été créés vers 1970 pour répondre aux besoins temporaires d'élèves en difficulté à l'école primaire. Cette structure a été peu évaluée et le texte propose une évaluation d'une part du fonctionnement des services et de l'allocation des moyens alloués aux différents GAPP, d'autre part, des effets des rééducations entreprises sur les acquisitions et carrières scolaires des élèves.Les résultats montrent des aléas importants dans l'allocation des moyens, ainsi qu'une très substantielle variété dans le fonctionnement des différents GAPP. Concernant les effets, et pour ce qui concerne …
MetaEdit— A flexible graphical environment for methodology modelling
1991
Existing CASE tools are often rigid and do not support the users' native methodologies. To alleviate this, more flexible and customisable tools called CASE shells are emerging. However, the customisation of those tools is still cumbersome and error-prone, and demands several configuration files that follow a rigid syntax of some metamodelling language(s). In order to make the customisation easier, we propose a graphical metamodelling editor, MetaEdit, with which the conceptual structures of the user methodology can be modelled easily using an easy-to-grasp graphical notation. With MetaEdit, methodology models can be constructed with less effort and the configuration files for the CASE shell…
Door-to-Door Prevalence Survey of Neurological Diseases in a Sicilian Population
1991
In three municipalities of Sicily, a prevalence survey of major neurological diseases was conducted door-to-door using screening and examination to find cases. This was the first large-scale neuroepid
The longitudinal muon polarization in KL → μ+μ-
1991
17 páginas, 3 figuras, 1 tabla.-- CERN-TH-6035-91 ; UWTHPH-1991-9.
Grim Emanuel
1991
Pharmakodynamische Wirkung hoher Dosen von B-Vitaminen
1991
Bei den B-Vitaminen kennt man den physiologischen Wirkungsmechanismus sehr genau. Fur diese Wirkungen sind nur sehr kleine Mengen erforderlich, wie wir sie aus den Ernahrungsempfehlungen verschiedener internationaler Gremien kennen. Daruber hinaus aber ist es in bestimmten Fallen sinnvoll, Vitamine in viel hoheren Dosen einzusetzen, als es dem nutritiven Bedarf entspricht, und man spricht dann etwas verschwommen von pharmakodynamischen oder pharmakologischen Wirkungen der Vitamine. Meines Wissens ist nie systematisch untersucht worden, was das eigentlich ist. Besinnen wir uns aber darauf, das man unter Pharmakodynamik eigentlich die Analyse von Wirkungsbedingungen und Wirkungsmechanismen ve…
Lithosphere Structure, Heat Flow, Gravity, and Other Geoparameters in Central Europe
1991
To clarify structure and evolution of Central European lithosphere, an approach is taken which combines several methods: multivariate statistical data analysis and modelling of data sets, as geology, crustal structure, seismic travel times, heat flow, gravity, geoid heights, topography, vertical motions and unloading affects.
Red cell Ca2+ content (cytosolic and total) and erythrocyte membrane fluidity in vascular atherosclerotic disease
1991
In Vivo Protective Effect of Tumour Necrosis Factor Against Experimental Infection with Herpes Simplex Virus Type 1
1991
C57BL/6 mice, which differ genetically from other strains by their resistance to herpes simplex virus type 1 (HSV-1) infection, were inoculated intraperitoneally with different doses of tumour necrosis factor alpha (TNF-alpha). Mice pretreated with 100 ng, or even 10 ng, of TNF-alpha showed prolonged survival compared to control mice that were infected with 10(7) p.f.u. of HSV-1. Significant protection was observed in mice injected 4 or 8 h prior to or after HSV-1 inoculation, respectively. Protection was also observed when mice which differed at their H-2 locus were treated with TNF-alpha after infection with HSV-1. Interferon could not be detected in the sera of mice at different time poi…
Luxación Traumática de Cadera en el Niño
1991
La luxación traumática de cadera en el niño es una lesión poco frecuente. Los autores presentan un caso de luxación anterior de cadera en un niño de 4 años producida por traumatismo mínimo. La exploración realizada en urgencias mostró impotencia funcional para la deambulación y gran dolor. El seguimiento ha sido de 18 meses tras los cuales el paciente no presenta complicaciones. Exponen su experiencia en el caso y revisión de la bibliografía. Traumatic hip dislocation of the hip is rare in children. The authors report a case of anterior hip dislocation in a 4-year-old boy who received relatively minor trauma. He was unable to walk and was in severe pain when seen in emergency room. He was f…
SIDA i Serveis Socials : un assaig sobre perfils psicológics i socials.
1991
This theoretical article content the social and psychological problems affecting persones with AIDS; their fears, familiar problems, sexual behavior and the contradictions and experiences that turn in the inculpation and self-inculpation to the/of the patient, making a necessary psychological intervention
Rotura del ligamento deltoideo del tobillo: evaluación clínico-quirúrgica
1991
No existe un criterio uniforme sobre la conduct a a seguir en el tratamient o de la rotur a del ligamento deltoideo del tobillo. Se ha n revisado 36 paciente s diagnosticados y tra - tado s quirúrgicament e de rotur a de dicho ligamento, la mayorí a de la s veces est a lesión iba acompañad a de fractur a del maleolo peroneo. Se ha valorado la etiología, el mecanismo lesional y los resultados siguiendo la clasificación de Cedell, considerándos e estos últimos como buenos en la práctic a totalidad de los casos. En cuatro de los paciente s (11%), se presentó como únic a secuela la limitación de la movilidad en los últimos grados de flexo-extensión Uniform criteria about the actions to be taken…
Pathologist’s Findings after PTCA (The Mechanism of Angioplasty)
1991
Knowledge of the pathological changes induced by percutaneous transluminal coronary angioplasty (PTCA) is necessary to understand its complications.
Effects of isoxaben on sensitive and tolerant plant cell cultures .II. Cellular alterations and inhibition of the synthesis of acid-insoluble cell wa…
1991
International audience
La industria exógena en la periferia occidental del área metropolitana de Valencia (A.M.V.)
1991
En el tejido industrial de las comarcas occidentales del A. M. V., el Camp de Túria y la Hoya de Buñol-Chiva, hallamos una dualismo respecto al origen de los establecimientos industriales ubicados en ambas comarcas: la industria autóctona y la actividad fabril foránea. Tras analizar los factores que condicionan la localización de estas industrias exógenas definiremos qué rasgos las caracterizan así como el nivel de integración con respecto al espacio que las acoge. En la industria foránea hemos diferenciado aquellos establecimientos industriales que se han instalado tras un traslado de aquéllos otros de nueva creación producto de la iniciativa foránea
Una aproximació historiogàfica a Giambattista Vico : el debat italià 1948-1968
1991
Aprender a resumir : creación y validación de un programa de entrenamiento en la estrategia del resumen
1991
Complete Nucleotide Sequence of a Hemoglobin Gene Cluster from the Midge Chironomus thummi piger
1991
The aquatic larvae of non-biting midges (Chironomidae, Diptera) contain a variety of Hb proteins in their hemolymph that enable them to survive in an anoxic environment (1). In Chironomus thummi thummi, 12 different Hb variants have been identified and their amino acid sequences determined (2). Based on these primary structures, the evolutionary relationships between the five monomeric and the s e v e n dimeric Hb proteins have been deduced (2). The two groups are thought to have evolved in two different lineages which separated more than 255 million years ago.
Hacha plana de bronce de Pico Jano (Vega de Liébana, Cantabria)
1991
En este artículo se estudia un hacha plana hallada en la comarca de Liébana (Cantabria). Esta comarca, a los pies de los Picos de Europa, se está demostrando como una de las más fructíferas de Cantabria para el estudio de la Prehistoria Reciente, gracias a los numerosos yacimientos localizados en los últimos años.
Quasi-Ductile Behaviour of Carbon-Reinforced Carbon
1991
Firstly a brief review of the problem of a “ductilization” of ceramic materials by endless-fiber reinforcement is given. The problems, especially the influence of the frictional stress in the fiber-matrix interface, are pointed out for the unidirectionally reinforced ceramic matrix composite (CMC) system LAS/SiC, which is well documented in the literature.
Pindolol als Tokolytikum — erste Erfahrungen
1991
Beta-2-Stimulatoren haben sich in den deutschsprachigen Landern zur tokolytischen Behandlung durchgesetzt. Sie haben vielfaltige Auswirkungen auf Hamodynamik, Kreislauf, Stoffwechsel, Wasser- und Elektrolythaushalt, welche bei ihrem Einsatz in der Schwangerschaft zu zwar uberschaubaren, teilweise jedoch recht unangenehmen Nebenwirkungen fuhren.
Number size distribution of insolubleatmospheric aerosol particles in fog/cloud-water
1991
AbstractThe design and the efficiency — curve of a newly developed fog/cloud-water sampler (rotating arm collector)is discussed. Fog/cloud-water samples were taken during Oct./Nov. 1990 on the mountain ‘Kleiner Feldberg’/Taunus, FRG. The number size distribution of the insoluble atmospheric aerosol particles in water is determined in the size range 0.025μm p . The size distribution of activated aerosol particles in air is derived from this distribution. Comparison of the spectrum of the activated aerosol particles with the total distribution of aerosol particles in air (measured during the same campaign, but in the size range 0.008μm p ) indicates, that in the size range r p > 0.06μm the ma…
Effect of surfactants on Albendazole absorption
1991
Banlieues 1891 : les enseignements d'un recensement exemplaire
1991
Cicatrización del fibrocartilago meniscal
1991
The Participation of the Complement System in Atherosclerotic Vascular Disease
1991
Atherosclerosis is a vascular disease of large and medium-sized arteries wherein the tunica intima becomes thickened due to lipid accumulation, mostly cholesterol and its esters, smooth muscle cell proliferation, and increased deposition of connective tissue matrix. A major risk factor in the development of this disease is hypercholesterolemia arising from elevated levels of low density lipoproteins (LDL). The earliest recognizable lesion, which may be a precursor to the fibrofatty plaque, is the fatty streak. It is predominantly composed of monocyte-derived macrophage foam cells, i.e. cells ladened with intracellular lipid droplets. Hence, a fundamental aspect of atherogenesis is the insud…
Wpływ wodoru na przebieg polimeryzacji etylenu wobec katalizatora tytanowo-glinowego z ligandami n-butoksylowymi
1991
The effect of hydrogen content on the kinetics of polymerization of ethylene in the presence of a catalytic system: Ti(OBu-n)4+Et2AlCl and on the average molecular mass of polyethylene has been investigated. It has been found that hydrogen does not change the kinetic character of the polymerization reaction, but it reduces the yield of polyethylene due to deactivation of a part of active centres. The values of the rate constants of the elementary reaction of chain termination with the participation of hydrogen and of monomer have been determined: they are, correspondingly, 2.53X10-1 dm3/(mole-s) and 8.22X10-3 dm3/(mole-s). Thus, hydrogen is an active transfer agent which controls the molecu…
Hidrodinámica relativista numérica : Aplicaciones al colapso estelar/
1991
Partial {$*$}-algebras of closable operators. II. States and representations of partial {$*$}-algebras
1991
This second paper on partial Op*-algebras is devoted to the theory of representations. A new definition of invariant positive sesquilinear forms on partial *-algebras is proposed, which enables to perform the familiar GNS construction. In order to get a better control of the corresponding representations, we introduce and study a restricted class of partial Op*-algebras, called partial GW*-algebras, which turn up naturally in a number of problems. As an example, we extend Powers' results about the standardness of GNS representations of abelian partial *-algebras.
Lavandula spp. (Lavender): In Vitro Culture, Regeneration of Plants, and the Formation of Essential Oils and Pigments
1991
Lavandula species are of great interest due to their content of essential oils, which are important to the perfume, cosmetic, flavoring and pharmaceutical industries. They also have numerous other applications, including their uses as ornamental and melliferous plants.
La nécropole protohistorique de Soucy « Mocques Bouteilles » (Yonne)
1991
National audience
Evaluation of models for estimating solar irradiation on vertical surfaces at Valencia, Spain
1991
Abstract Hourly irradiation data recorded on vertical surfaces at north, east, south, and west orientations during the winter period going from December 1989 to March 1990 in Valencia, Spain, have been compared with estimated solar irradiation from several tilted-surface models. The isotropic-, Temps' and Coulson's-, Klucher's-, Hay's-, Skartveit's and Olseth's-, Gueymard's- and Perez' (simplified) models have been considered for this comparison. Root-mean-square-difference (RMSD), mean-bias-difference (MBD) and mean-absolute-difference (MAD) estimators have been used to measure the departure of models from experimental data. Modeled values are evaluated with the original coefficients propo…
Automorphisms of the integral group rings of some wreath products
1991
The Human T Cell Response to Mitogenic Microbial Exotoxins
1991
Nearly every infectious pathogen has to cope with the host’s adaptive immune response. Common evasion mechanisms in this complex interaction are antigenic variations, the escape to immunologically privileged sites, or the use of immunosuppressive mechanisms. Many bacteria and other microorganisms elaborate soluble factors or toxins that act suppressively on cells of the immune system, such as pore-forming molecules or proteins that interfere with the function of G proteins. Gram-positive cocci and a mycoplasma have developed an extremely potent mechanism of T cell stimulation by closely mimicking recognition of specific antigen. From the functional similarity to antigen recognition and the …