showing 36 of ~574560 from 574555 documents
Essai sur la demande d'éducation
1977
International audience
La Pobla de Farnals (Área Metropolitana de Valencia)
1977
Laser light scattering and polydispersity of polymers
1977
The application of lasers to light scattering improves the potentials of elastic scattering, especially in the high molecular weight range and enables the technique of inelastic scattering to be used. For elastic light scattering an experimental arrangement and an evaluation method is described which allows, within appropriate molecular weight ranges, the determination of the ratio Mw/Mn from the experimental scattering function with an accuracy down to 0.02. The newer technique of inelastic light scattering yields the coefficient of translational diffusion D. Besides D, the friction coefficient f is also directly accessible. The basic equations are reported, as well as an application to mi…
Higher-order effects for the coupling constant in asymptotically free theories
1977
It is shown that the two-loop contribution to the Callan-Symanzik $\ensuremath{\beta}$ function leads to an effective coupling constant which may be quite different from the value obtained from the standard one-loop calculation. This correction is larger than that due to finite quark masses. Possible implications for the comparison between asymptotically free theories and experiment are discussed.
Violurato complexes of transition metals.
1977
Algorithm AS 105: Fitting a Covariance Selection Model to a Matrix
1977
Zur inversvoltammetrischen Bestimmung des Zinks in Grundlösungen mit Triäthanolamin
1977
Zur inversvoltammetrischen Bestimmung des Zinks werden triathanolaminhaltige Grundlosungen vorgeschlagen. Der Einflus niederschlagbildender Ionen ist in diesen Grundlosungen erheblich herabgesetzt. Arbeitsbedingungen fur die Zinkbestimmung werden angegeben.
Caractéristiques et conditions de réussite, d'échec ou d'abandon à l'Université de Dijon
1977
International audience; Cet article donne les très grandes lignes d'une recherche engagée pour le compte du Service d'Études et d'Informations Statistiques du Secrétariat d'État aux Universités. La recherche s'appuie sur une enquête longitudinale menée à l'Université de Dijon depuis la rentrée 1974. Le texte donne très rapidement les caractéristiques des inscriptions universitaires dans les différentes filières et est principalement centré sur la construction de modèles de réussite. Ces modèles multivariés, qui ont fait l'objet de recherches méthodologiques spécifiques, permettent de séparer les effets des différentes variables et de calculer les probabilités de réussite de n'importe quel é…
Un conflicto de señoríos en la España del siglo XVI: pleito entre la vilal de Alhama de Murcia y su señor el Marqués de los Vélez (1548-1592)
1977
Finite-energy sum rules and finite dispersion relations for K*→Kππ transitions
1977
Nota preliminar sobre las excavaciones en la pendiente sur del cerro del castillo de Sagunto
1977
Optik und allgemeine Strahlungslehre
1977
Sichtbares Licht ist eine von der Sonne oder anderen Lichtquellen ausgesandte, im Raum sich ausbreitende Strahlung, die beim Auftreffen auf einen undurchsichtigen Korper diesen zu erwarmen vermag und die in unserem Auge eine Empfindung hervorruft. Die Lichtstrahlung ubertragt also Energie. Da das Licht der Sonne durch den leeren Weltraum zu uns gelangt, ist zu seiner Ausbreitung im Gegensatz zum Schall kein materielles Medium erforderlich. Wie wir spater durch Experimente bestatigen werden (Abschn. 7.4), handelt es sich bei der Lichtausbreitung um einen Wellenvorgang, und zwar um elektromagnetische Wellen. Diese haben jedoch eine viel kurzere Wellenlange als die von Dipolantennen ausgestrah…
La democracia-ficción
1977
Se desconoce si la versión original del artículo, escrita en 1976, fue publicada en alguna revista política antes de recogerse en "Del Franquismo a una democracia de clase".
Origine et rôle du cuivre et du fer dans la fabrication de la moutarde de Dijon
1977
National audience
La ganaderia valenciana en el siglo XVI
1977
Demografía y alimentación en la baronía de Pedralba y Bugarra (1610-1720)
1977
Effect of coronary perfusion rate on the hydrolysis of exogenous and endogenous acetylcholine in the isolated heart
1977
1. The effect of perfusion rate on the hydrolysis of acetylcholine in isolated chicken hearts was studied by measuring both the spontaneous and the evoked output of endogenous acetylcholine into the perfusate in response to vagal stimulation and the arterio-venous difference of exogenous acetylcholine. 2. A decrease in the perfusion rate from 30 to 20 and 10 ml/min caused a graded and significant decline of both the spontaneous overflow of acetylcholine and the overflow evoked by stimulation of both vagus nerves (20 Hz, 1 ms, 40V) for 20 min. The spontaneous and evoked overflow at 30 ml/min were 2 and 3 times, respectively, the overflow at 10 ml/min. 3. Physostigmine (10−6M) raised both the…
El censo redimible y al quitar: un mecanismo real de transferencia de la propiedad
1977
Mössbauer spectroscopic studies of clusters Mn2(CO)8[μ-Sn(hal)Mn(CO)5]2 (hal = Cl, Br) and related Mn and Re compounds
1977
Abstract In order to be acquainted with the nature of bonds at Sn involved in the title compounds, as well as to get information on the configuration of the strictly related derivatives I2Sn2Mn4(CO)18 and Cl2Sn2Re4(CO)18, the Mossbauer spectroscopic investigation reported in this paper has been carried out. The experimental parameters (isomer shifts, δ; nuclear quadrupole splittings, ΔE; for the bromide derivative only, the asymmetry parameter η and the sign of the nuclear quadrupole coupling constant e2qQ) have been discussed in connection with data concerning compounds with tin-transition metal bonds, mainly hal2Sn[Mn(CO)5]2 (hal = Cl, Br) and ClSn[Mn(CO)5]3. Rationalizations of ΔE and η …
Profesors Antons Kolotijevskis: personālais literatūras rādītājs
1977
Saturs: Priekšvārds. Ģeogrāfijas zinātņu doktors profesors Antons Kolotijevskis. Ģeogrāfijas zinātņu doktora profesora A. Kolotijevska publicētie darbi (1947.-1976.). Ģeogrāfijas zinātņu doktora profesora A. Kolotijevska rediģētie darbi. Raksti par ģeogrāfijas zinātņu doktoru profesoru A. Kolotijevski. Profesora A. Kolotijevska darbu alfabētiskais rādītājs. Personu rādītājs.
Aspectos preliminares
1977
Regime transitoire de transpiration au cours de l'installation progressive d'une carence hydrique
1977
National audience
Crystal Electric Fields in Rare-Earth Al2 Compounds
1977
Neutron time-of-flight measurements have been performed on REAl2 compounds (RE = Pr, Ho, Er, Tm) in the paramagnetic region. Resolved crystal field transitions are observed in ErAl2 and TmAl2. We deduce crystal field parameters (x = 0.16, W = -0.030 meV) and (x = -0.28, W = +0.040 meV) for ErAl2 and TmAl2 respectively.
A Contribution to the Categories of Social Time and the Economy of Time
1977
The article strives to demonstrate the centrality of the category of social time (a) in people's daily lives, (b) as a methodological tool in the study of social process, and (c) as a means towards the planned development and management of advanced societies. Social time has two aspects: rhythm of life and available total time. The article shows that in advanced societies total time and its rational allocation are central in the development of society and individual personality. The nature of social time in less developed societies is also reviewed as well as the historical development of time awareness and the problems of the research on time budget. The article is based on the conception…
Ein unabh�ngiges Verfahren zur Messung der Zusammensetzung von Gasgemischen mit Hilfe der Gaschromatographie
1977
The volume fraction of gas mixtures may be measured gas chromatographically by application of the 100% method, provided they can be separated. In case of gases it is not necessary to calibrate with another method. The specific character of the detector signals can be eliminated by measurements with pure components. The procedure is compared with the Scholander method. In case of O2/N2 mixtures the results agree within reproducibility, but in case of O2/CO2/N2 mixtures a systematic deviation of the CO2 fractions to smaller values is found as concerns the Scholander method. A gas mixture with 5.6 Vol% CO2 shows a difference of approximately 0.3 Vol%. The gas chromatographic method is almost 1…
Jaunas iezīmes un pretrunu pieaugums mūsdienu kapitālisma ekonomikā. 1.sējums
1977
Rakstu krājums domāts tiem, kas interesējas par kapitālisma politisko ekonomiju.
Non linear representations of Lie Groups
1977
International audience
Demografía sanitaria de Castellón de la Plana (1843-1869)
1977
Grundlagen verkehrsbetrieblicher Leistungserstellung
1977
Im allgemeinen ist jede betriebliche Produktion insofern von den Produktionsfaktoren her gesehen verbundene Produktion, als zumindest einer oder einige der in den Betrieben jeweils eingesetzten Produktionsfaktoren fur mehr als die Erstellung nur einer einzigen Leistung eingesetzt werden konnen und auch eingesetzt werden. Die moglichen Formen der produktionswirtschaftlichen Verbundenheit sind recht zahlreich. Ein Produktionsfaktor kann zum Beispiel gleichzeitig oder zeitlich nacheinander zur Erstellung mehrerer Leistungen genutzt werden. Die unter seiner Mitwirkung erstellten Leistungen konnen untereinander gleich oder verschieden sein. Im Falle gleichzeitiger Erstellung mehrerer untereinand…
La spiritualité des officiers royaux au début du XVIe siècle : Antoine Robert, bourgeois de Paris et secrétaire du roi de Louis XI à François Ier
1977
Antoine Robert, clerk of the high judicial court in Paris during the reign of Francis 1st, was one of the oldest royal secretaries when he died in 1521, on September. He is known to have given all his personnal assets and properties to the benedictin convent of the Blancs-Manteaux in Paris. His religious behaviour can be studied through three documents relating to his will, foundation and inheritance. So Antoine Robert, rather a rich and well educated laic seems to corroborate the weight of ideas which were brought from Flanders into France by the " Frères de la vie commune " and developped during the Reformation. The biblical and ancient authors' quotations contained in his will show that …
Observations "économiques" quant à la demande d'éducation
1977
International audience; Ce texte vise à donner le point de vue d'un économiste quant à l'analyse de la demande individuelle d'éducation et à l'explication des structures observées en démographie scolaire à partir d'un raisonnement fondé sur la rationalité du comportement des agents privés dans une situation générale de rareté.
RECENT DEVELOPMENTS INVOLVING ISOBARS IN NUCLEAR SYSTEMS — Workshop D
1977
Developments of the last year or two concerning the role of isobar resonances in nuclear systems are reviewed. Special attention is given to the influence of the A isobar in the nucleon-nucleon force and to the possibility of the existence of NA or AA bound states. Also mentioned are the effects of the A in polarized pp scattering, in proton-nucleus scattering and in nuclear matter and the ground states of finite nuclei. Recent experiments intended to observe preexisting isobar configurations in nuclei are briefly surveyed. Approaches to pion-nucleus scattering based on NA interactions are discussed.
The fluxional behaviour of η6(bicyclo[6.2.0]deca-2,4,6-triene) hexacarbonyl diruthenium (Ru-Ru) by 1H and 13C NMR techniques
1977
Abstract The variable temperature 1 H NMR spectra of [Ru 2 (CO) 6 η 6 -C 10 H 12 )] (C 10 H 12 = bicyclo [6.2.0]-deca-2,4,6-triene) shows that this molecule undergoes the fluxional behaviour previously reported for [M 2 (CO) 6 (η 6 -polyolefin)] complexes (M = Fe, Ru) which have in the solid an asymmetric skew-type structure. The use of 13 C NMR techniques, employed for the first time for a diruthenium complex of the above type, allows a comparison of the mechanism of the fluxional process with that of the diiron analog. Although the observed line shape changes of the carbonyl resonances in the two complexes are somewhat different the process are basically the same. In the case of the dirut…