Search results for "Autor"
showing 10 items of 820 documents
Análisis del proceso de internacionalización de la investigación española en ciencia y tecnología (1980-2007)
2012
The process of scientific internationalization in Spain is based on an analysis of the growth of scientific publications and the evolution of international collaboration in Spanish scientific papers indexed in the Science Citation Index-Expanded database between 1980 and 2007. The article examines science policies in Spain together with the investments in economic and human resources devoted to research, and their effects on the internationalization process. Scholarly research in Spain has become increasingly international over the last three decades. The main features of this process have been a linear growth of productivity in terms of the number of papers published per year; a progressiv…
GARCH models with changes in variance: An approximation to risk measurements
2003
This study aims to model volatility as an approximation to an optimum measurement of stock market risk because of the importance of this concept for, among other things, the proper management of portfolios. Following the proposal of Lamoureux and Lastrapes (1990), the authors consider that the high degree of persistence detected in GARCH models arises from a poor specification of the equation of the variance due to not considering the possible deterministic changes in the unconditional variance of the financial series. To determine the point in time as well as the duration of these changes, the proposal made by Inclan and Tiao (1994) is used. As an empirical application, whether or not the …
Assessing commodity price risks and terms of trade exposures in emerging and developing countries
2020
This paper provides novel evidence on commodity exposure (impacts of commodity price and terms of trade fluctuations) amongst 46 emerging and developing countries (EMDCs) in Africa, Asia and the Latin American and Caribbean (LAC) region. We focus on the exposures of six macroeconomic variables to the commodity prices and terms of trade, based on the real business cycle (RBC) theory. Our empirical results indicate that, overall, about 10% of the macroeconomic variation amongst the EMDCs is due to commodity market-related exposures. The Asian and LAC economies are especially sensitive to changes in commodity prices. The changes in the prices of world trade have an imminent impact on non-commo…
An ‘Authoritarian Nexus’? China’s Alleged Special Relationship with Autocratic States in Latin America
2015
China’s rise is often interpreted as a harbinger of a new era in world politics and raises the question if such a power transition may impact upon patterns of democratic rule across the globe. There is growing interest in whether China acts as an outside stabilizer for other authoritarian regimes. This paper contributes to the emerging literature on the international dimension of autocratic rule by focusing on Chinese Latin American policy. Using the method of structured focused comparisons, we want to assess whether China’s relations towards the Latin American autocracies Cuba and Venezuela differ from those with structurally similar, but democratic cooperation partners in the region, name…
Rei publicae Romanae auctor : la construction du mythe de Lucius Junius Brutus à l’époque impériale
2023
Un archétype au service des idées républicaines Dans sa dissertation académique consacrée à la figure de Lucius Junius Brutus, au début du xviiie siècle, Christoph Ludwig Crell, un juriste érudit habitué à travailler sur l’histoire et le droit des Romains, n’hésitait pas à caractériser ce personnage comme le fondateur de la république romaine : rei publicae Romanae auctor. Revalorisant des témoignages antiques, et avant tout les récits de Tite-Live et Denys d’Halicarnasse, sur le rôle de prem...
Transcription of heat shock gene loci versus non-heat shock loci in Chironomus polytene chromosomes: evidence for heat-induced formation of novel put…
1995
The heat shock response of Chironomus polytene chromosomes was reexamined. The in vivo effects of heat shock on chromosomal [3H]uridine labeling, RNA polymerase II distribution and ribonucleoprotein (RNP) formation were investigated. One primary result is a clarification of the number and location of chromosomal sites strongly induced by treatment at 37 degrees C for 60 min. In total, seven major heat shock loci were identified by transcription autoradiography in Chironomus tentans: I-20A, II-16B, II-10C, II-4B, II-1C, III-12B, and IV-5C. Secondly, combining immunofluorescence with transcription autoradiography, I find RNA polymerase II occurring after heat shock at multiple chromosomal sit…
Autorecupero: una pratica d’innovazione urbana?
2013
La questione abitativa ci sembra rappresentare uno dei campi problematici che più mette in discussione la visione e la concezione delle città, del vivere urbano e dell’abitare, ma anche i rapporti fra la disciplina urbanistica e la politica e le scelte di quest’ultima. L'articolo intende spiegare come l'autorecupero mostri la sua carica di innovazione, tanto dal punto di vista delle realtà urbane quanto per gli studi urbanistici.
Multi-year drought frequency analysis at multiple sites by operational hydrology - A comparison of methods
2006
Abstract This paper compares two generators of yearly water availabilities from sources located at multiple sites with regard to their ability to reproduce the characteristics of historical critical periods and to provide reliable results in terms of the return period of critical sequences of different length. The two models are a novel multi-site Markov mixture model explicitly accounting for drought occurrences and a multivariate ARMA. In the case of the multisite Markov mixture model parameter estimation is limited to a search in the parameter space guided by the value of parameter λ to show the sensitivity of the model to this parameter. Application to two of the longest time series of …
Relation between autoradiographically measured blood flow and ATP concentrations obtained from imaging bioluminescence in tumors following hypertherm…
1993
The effects of moderate local hyperthermia (43.3 degrees C/30 min) on regional blood flow and regional ATP distribution in the amelanotic hamster melanoma A-Mel-3 were investigated by high-resolution techniques. Blood flow and ATP concentrations were measured simultaneously in treated and untreated tumors and in adjacent tissues by means of (14C)-Iodoantipyrine autoradiography and quantitative imaging bioluminescence in consecutive tissue sections at 3, 12 and 24 hr following treatment. Digital image processing and the use of a special algorithm allowed the regional interrelationship of the 2 parameters to be quantified. Measurements revealed a great heterogeneity of blood flow and ATP betw…
Le istituzioni della regolazione
2008
La regolazione non si limita alla sola creazione di regole, ma comprende anche le attività che le rendono più o meno efficaci. Tra le istituzioni della regolazione pubblica andrebbero inclusi, se e in quanto producono regole, non solo i parlamenti (o in genere le assemblee legislative, ricordando peraltro che nel nostro paese divengono sempre più importanti quelle regionali) e gli esecutivi, non solo le istituzioni comunitarie e alcune istituzioni sopranazionali, ma anche i soggetti che hanno il compito di interpretare e applicare tali regole (talora di fatto creandone di ulteriori), quali le pubbliche amministrazioni e il potere giudiziario. Vi sono poi gli organismi indipendenti che, in m…