showing 36 of ~574560 from 574555 documents
Una inscripción funeraria hallada en La Calerilla (Hortunas, Requena)
1991
Large-Scale Synthesis of Mammalian Gonadoliberin without protection of side-chain functions
1991
A simple, Large-scale preparation of mammalian gonadoliberin was elaborated using classical solution methods without protecting side-chain functions. At the final stage, a hexapeptide segment was condensed with the corresponding tetrapeptide and the obtained decapeptide was purified by a single chromatographic procedure on silica gel. The total efficiency of the whole synthesis and the purity of the product amounted to 34% and 98.3%, respectively.
Statistical analysis of noise levels in urban areas
1991
Abstract Environmental noise measurements have been carried out during recent years in different cities and locations of Spain. The noise levels have been continuously sampled over 24 h periods using a noise level analyzer. The data contained in this paper represent a total of 4200 measurement hours. All the information has been used to investigate the time patterns of the noise levels under a wide range of different conditions and to study the relationships between several noise descriptors in urban areas.
Algorithms for the calculation of the projected area factors of seated and standing persons
1991
Moderate thermal environments, other than being affected by the mutual radiative heat exchange at low frequency among the internal surfaces, are often characterized by the presence of high intensity sources, that is, radiant sources showing a small area, a high emission temperature and a strongly directional beam. The sun's direct radiation can be considered to be among these radiant sources. In these cases, the computation of the mean radiant temperature and, consequently, the evaluation of the thermal comfort conditions, require knowledge of the “project area factor”, fp, of the subject. Moreover, the fp parameters are also applicable to derivation of the shape factors between subjects an…
RCS1, a gene involved in controlling cell size inSaccharomyces cerevisiae
1991
Cloning and sequencing of RCS1, Saccharomyces cerevisiae gene whose product seems to be involved in timing the budding event of the cell cycle, is described. A haploid strain in which the 3'-terminal region of the chromosomal copy of the gene has been disrupted produces cells that are, on average, twice the size of cells of the parental strain. The critical size for budding in the mutant is similarly increased, and the disruption mutation is dominant in a diploid heterozygous for the RCS1 gene. Spores from this diploid have a reduced ability to germinate, the effect being more pronounced in the spores carrying the disrupted copy of RCS1. However, disrupted cells recover from alpha-factor tr…
El Magreb: Crecimiento demográfico, empleo y emigración
1991
En aras de un mayor aprovechamiento docente de la investigación, sería deseable que los geógrafos españoles ahondasen en el estudio de otras regiones. Para nosotros la importancia del Maghreb está fuera de toda duda: proximidad geográfica, flujos migratorios, etc. Desde el momento de su independencia política, esta región norteafricana ha conocido un extraordinario crecimiento demográfico, que continúa en el momento actual, como resultado de la progresiva reducción de la mortalidad y del mantenimiento de una elevada fecundidad. Las diferencias entre los países del área obedecen al rol de la mujer, fuertemente condicionado por las políticas gubernamentales. La creación de puestos de trabajo …
Fracturas de Astrágalo: Evaluación Clínico-Quirúrgica
1991
Se han revisado 13 pacientes diagnosticados de fractura de astrágalo recogidos en nuestro Servicio de Urgencias y tratados quirúrgicamente en todos los casos. De ellos se ha realizado un seguimiento clínico y radiológico. En el 46% de los casos se obtuvieron resultados satisfactorios (23% excelentes y 23% buenos). Los restantes se repartieron entre regulares (38%) y malos (16%). La necrosis avascular apareció en 3 de los 13 casos, discutiéndose el origen de esta seria complicación. Siguiendo la clasificación de WEBER, los tipos de fractura más frecuentes fueron el tipo III (38%) y el II (31%). La congruencia articular postquirúrgica del astrágalo fracturado y el tiempo de demora en la cirug…
La necrópolis megalítica de la Peña Oviedo (Camaleño, Cantabria)
1991
La excavaci ón del conjunto megalítico de la Peña Oviedo , pretende ser el inicio de un estudio más ampl io que aborde de manera global el fenómeno megalítico en las cuencas altas de los ríos Deva y Nansa. El total desconoc imie nto que se tenía hasta esta década, no ya del fenómeno megalítico, sino incluso de su existencia en estos valles montañosos del Occidente de Cant abria hace necesa rio un eswdio que ponga de manifies to sus características y las relaciones con las áre as vec inas. Un paso necesario para avanzar en este terreno es la pro specc ión sistemát ica de estas comarc as. pues el desconocimielllo de la extensión del fenómeno es tal que práct icamente cada día se incorporan nu…
El método iconológico y el paranoico-crítico
1991
SE ESTABLECE UNA LIGAZON QUE UNIRIA EN ORDEN CRONOLOGICO A SIGMUND FREUD, FUNDADOR DEL PSICOANALISIS, CON ABY WARBURG, PADRE DEL METODO ICONOLOGICO, Y A ESTE CON SALVADOR DALI, INVENTOR DEL METODO PARANOICO-CRITICO. TODOS ELLOS COMPARTEN LA IDEA DE QUE LA VIDA CONSCIENTE ESTA CONDICIONADA POR EL INCONSCIENTE, Y LA IMPORTANCIA DE LOS SUEÑOS. SIN EMBARGO, PESE A TENER UNA MISMA RAIZ, EL METODO ICONOLOGICO HA RECIBIDO EL RECONOCIMIENTO ACADEMICO; MIENTRAS QUE DEL PARANOICO SOLO SE HA DESTACADO SU VALOR POETICO. FINALMENTE, SE CUESTIONA ESTA RADICAL CONSIDERACION SEGUN LA EVOLUCION DE ESTOS METODOS. (A.B.C./ L.A.G.)
Effects of aminophosphates and their combinations with glyphosate on the growth ofLepidium sativumL. andCucumis sativusL.
1991
A possible oviposition deterring pheromone in the European corn borer
1991
L'école (acquis et évolution des problèmatiques dans la sociologie française contemporaine)
1991
International audience
The effect of conventional movement training and trampoline training on balance and gait in chronic hemiplegic patients
1991
The postural sway of subjects during standing both with their eyes open and closed together with maximum velocity of walking were analysed in six male chronic hemiplegic patients before, during and after an intensive movement training programme lasting 8 weeks. The movement training programme was carried out on the basis of Bobath's principles. Three of the subjects carried out their training on a trampoline, with the particular purpose of enhancing the stimulation of the mechanisms responsible for the control of balance. During the follow-up, maximal walking velocity remained at previous levels and no systematic changes were observed in the control of postural sway. Although the use of the…
Husserl’s Concept of “Intentionality” as the Starting Point for Sartre’s Thinking
1991
The influence of Phenomenology, especially that of Husserl, is extremely important in Sartre’s thinking, particularly in the first period which reaches its high point with the phenomenological ontology expounded in L’etre et le neant.
An associative link from geometric to symbolic representations in artificial vision
1991
Recent approaches to modelling the reference of internal symbolic representations of intelligent systems suggest to consider a computational level of a subsymbolic kind. In this paper the integration between symbolic and subsymbolic processing is approached in the framework of the research work currently carried on by the authors in the field of artificial vision. An associative mapping mechanism is defined in order to relate the constructs of the symbolic representation to a geometric model of the observed scene.
Основы теории нечетких топологических пространств
1991
Recursive estimators 1
1991
In this paper, we present first the recursive estimation of parameters of linear regression models and we show the link between a matrix of projection and a matrix of gain. Two cases are examined : constant parameters and parameters changing over time. In the second part the recursion formulae for the two stage least squares are given.
Novedades epigráficas de la ciudad de Valencia
1991
La literatura emblemática, Goya y la avaricia
1991
GOYA, A CABALLO ENTRE DOS EPOCAS, RECURRIO A LA EMBLEMATICA COMO FUENTE DE INSPIRACION EN ALGUNAS DE SUS OBRAS, A LAS QUE IMPRIMIO SU PERSONAL INTERPRETACION. CON ESTA ORIENTACION, ENTRE SUS PRINCIPALES FUENTES SE ENCUENTRAN LOS EMBLEMAS DE ALCIATO Y EL TEATRO MORAL DE VAENIUS. (A.B.C./ L.A.G.)
Automorphisms of direct products of algebroid spaces
1991
Stochastic linearization for the response of MDOF systems subjected to external and parametric Gaussian excitations
1991
The stochastic linearization approach is examined for the most general case of non zero-mean response of non-linear MDOF systems subjected to parametric and external Gaussian white excitations. It is shown that, for these systems too, stochastic linearization and Gaussian closure are two equivalent approaches if the former is applied to the coefficients of the Ito differential rule. Moreover, an extension of the Atalik-Utku approach to non zero-mean response systems allows to obtain simple formulations for the linearized drift coefficients. Some applications show the good accuracy of the method.
Trésors et trésoriers des paroisses de Rouen (1450-1530)
1991
Owing to the collections more andmore profitable, to the foundations of perpetual masses, particularly numerous in the 1480-1510 period, the rouennais churchwardens have substantial financial resources that they use in a vast programme of reconstruction of the places of worship, some purchases of somptuous vestments and some interest loans. Playing so a not insignificant part in the economy of the town, they are recruited from amogn the greatest families, who consolidate their prestige and their influence by a luxurious piety for the profit of their parish.
Universitātes Avīze: 1991, Nr. 19-35, 1-6
1991
"Universitātes Avīzes" 1991. gada Nr. 1-6 ietver laika posmu no augusta līdz decembrim. Precīzas Izdošanas ziņas nav zināmas.
Poder político, Iglesia y cultura en Valencia (1545-1611)
1991
La Ecografía de Partes Blandas como Técnica Diagnóstica de los Quistes Poplíteos
1991
Se presentan 39 casos de quistes poplíteos estudiados mediante ultrasonografía durante los últimos 5 años en el Hospital Clínico de Valencia. Se discute acerca de la utilidad de la ecografía de partes blandas en el diagnóstico de las patologías del hueco poplíteo, haciendo hincapié en sus ventajas respecto a otras técnicas más costosas e invasivas. The authors report 39 cases of popliteal's cysts diagnosed with ultrasonography along the last five years in the Hospital Clínico of Valencia. They argue about the usefulness of ultrasonography of soft-tissues in the diagnosis of popliteal pathologies, urging on his advantages over other techniques more aggresive and expensive.
Gas chromatography-mass spectrometry and gas chromatography-tandem mass spectrometry of cyclic fatty acid monomers isolated from heated fats
1991
International audience
Kontinentes Appendixstoma — Modifikation der Mainz-Pouch Technik
1991
Bei allen Formen der kontinenten Harnableitung hat sich die Bildung eines dauerhaften Kontinenzmechanismus als wesentliches Problem herausgestellt. Dies zeigen deutlich Skinners Ergebnisse mit dem Kock-Pouch [5], wobei hier ausschlieslich die Probleme am Kontinenznippel, also am efferenten Nippel, aufgefuhrt sind. Bei den ersten 150 Patienten traten bei Skinner Nippelprobleme in 52% auf, in Serie II waren es immerhin noch 31 %, und auch nach einer entsprechend langen Learning Kurve traten bei den letzten 239 Patienten in 18, 6% Nippelprobleme auf.
A comparison of the triceps surae and residual muscle moments at the ankle during cycling.
1991
The rigid linked system model and principles of inverse dynamics have been widely used to calculate residual muscle moments during various activities. EMG driven models and optimization algorithms have also been presented in the literature in efforts to estimate skeletal muscle forces and evaluate their possible contribution to the residual muscle moment. Additionally, skeletal muscle-tendon forces have been measured, directly, in both animals and humans. The purpose of this investigation was to calculate the moment produced by the triceps surae muscles and compare it to the residual muscle moment at the ankle during cycling at three power outputs (90, 180 and 270 W). Inferences were made r…
Seroepidemiology of pertussis infection in an urban childhood population in Cameroon.
1991
In 1989, the prevalence of IgG antibodies to pertussis toxin (PT) in a sample of 367 unvaccinated apparently healthy children 5-14 years old was estimated by ELISA in Kumba City (Cameroon). Children were recruited using a systematic random sampling from six primary schools located in different districts of the city. The sample was representative of the various socioeconomic classes. The overall prevalence was 75%; it increased from 62% in 5 year old children to 81% in children 12-14 years old (P less than 0.01). IgG antibody prevalence was positively related to the family size. Children belonging to households of nine or more members had a 2.2-fold risk (C.I. 95 per cent = 1.1-4.6) of previ…
INSECTS, SMALL MAMMALS AND BREEDING PERFORMANCE OF FARMLAND POPULATIONS OF THE COMMON KESTREL (FALCO TINNUNCULUS) IN SICILY.
1991
Pragmática y análisis conversacional: hacia una pragmática del receptor
1991
La construcción de una verdadera pragmática dialógica, que pueda superar el ámbito restringida de un acto de habla aislado, pasa sin duda por la inclusión del receptor. En el aspecto puramento teórico, pensamos que esta pragmática del receptor podria integrar las aportaciones de la pragmática de la enunciación y el anáiisis del discurso, junto con las del análisis conversacional de 10s etnometodólogos. Desde esta perspectiva, y tomando como punto de partida la visi6n liminar de la pragmática comunicativa, hemos intentado presentar un modelo que no pierda de vista el dinamismo cornunicativo, la relación de subsunción que vincula al emisor y al receptor. El enfrentamiento que en el dominio de…
Pratiques pédagogiques et acquis des élèves au CP
1991
International audience; Cette étude rend compte de l'analyse des pratiques pédagogiques déclarées par les ma\ⁱtres du cours préparatoire. Elle présente des données issues du "volet pédagogique" du panel d'élèves 1979 de la direction de l'évaluation et de la prospection du ministère de l'éducation nationale. Dans un premier temps, deux typologies de ma\ⁱtres ont pu être repérées au sein de la diversité des pratiques pédagogiques mises en oeuvre. La première oppose des ma\ⁱtres "experts", se disant traditionnels dans leurs conceptions et leurs démarches, directifs, à des ma\ⁱtres "animateurs", disant valoriser l'expression et le raisonnement, plus attachés aux interactions entre élèves. Une s…
La Ilustración en la Universidad de Córdoba y el Colegio de San Carlos de Buenos Aires (1767-1810)
1991
La Ilustración fue una corriente ideológico-intelectual antidogmática, crítica, racionalista, partidaria de los saberes útiles y reformista. Los philosophos retaron las respuestas teológicas, metafísicas y jurídico-políticas, y se lanzaron a revisar críticamente, más o menos intensamente, las nociones fundamentales heredadas. La Ilustración respondía a las mutaciones sociales y económicas que se operaban a lo largo de la centuria (ascenso de capas burguesas, desarrollo del capital comercial), cambios éstos que provocaron una honda crisis de conciencia (subrayada por Paul Hazard) y determinaron la búsqueda de nuevos sistemas de representaciones capaces de dar respuesta a las demandas acucian…
The Terminal Complement Complex (TCC) in the Plasma of Patients with Type 1 Diabetes Mellitus. Relationship with Albumin Excretion Rate
1991
Increased TCC levels were found to be present in the plasma of patients with type 1 diabetes associated with the presence of anti-heparan sulfate antibodies and increased urinary excretion of albumin. The authors suggest a role of terminal complement activation in the pathogenesis of diabetic nephropathy.
Das Kiefergelenk bei entzündlichen, degenerativen und weichteilrheumatischen Erkrankungen
1991
Temporomandibular joint affections in rheumatic disease are described. They were seen in inflamed joint diseases, mostly in rheumatoid arthritis, and less so in juvenile rheumatoid arthritis, psoriatic arthritis, Reiter’s syndrome, ankylosing spondylitis, and collagen vascular disease.
ADT implementation and completion by induction from examples
1991
There exists a fast algorithm [2] for inductive synthesis of terminating and ground confluent term rewriting systems from samples. The principles of this algorithm and the methodology of its use for implementation and completion of abstract data types are described.