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The practice of having PhDs employed by the university that trained them, commonly called "academic inbreeding" has long been assumed to have a damaging effect on scholarly practices and achievement. Despite this perception, existing work on academic inbreeding is scarce and mostly descriptive or speculative. In this research we show, first, that academic(More)
The purpose of this study was the in vitro evaluation of four techniques for the obturation of the root canal system in the presence or absence of a smear layer. Ninety-six human upper central incisors were instrumented using the pressureless crown-down technique and irrigated with 5.25% NaOCl. The teeth that had the smear layer removed were irrigated with(More)
Recent reports suggest that, during the 1990s, the EU15 overcame the US as the world largest scientific producing block. In this paper we perform a comprehensive comparative analysis of the evolution of the EU15 and US scientific output and impact throughout the 1990s looking at publications and impact trends by scientific field. Results show that changes(More)
Article history: Received 29 October 2012 Received in revised form 18 June 2013 Accepted 9 July 2013 Available online 14 August 2013 Science policies emphasizing the advanced qualification of human resources, together with democratizing access to science and internationalizing the science base, are shown to help build the conditions needed to drive brain(More)
This study developed the Multi-Dimensional Research Agendas Inventory to measure the key factors associated with the process of research agenda setting. Research agendas reflect the preferences, strategies, influences and goals that guide researchers’ decisions to investigate specific topics. The results of exploratory and confirmatory factor analyses(More)
The features of science and technology (S&T) systems change over time. Simultaneously, at an individual level, the characteristics of actors in these systems also change concomitantly. In this study, the characteristics of doctorates in a changing S&T system are analyzed. This is performed by a series of cluster analyses on doctorates—with the goal of(More)
In 1986, a Program on Prevention of Allergic Diseases was initiated in our country which was possible on account of the organization conditions of our health system. The program includes IgE measurement in umbilical cord serum by means of an ultramicroanalytic technique for IgE quantification. This is an heterogeneous sandwich-type immunoassay that requires(More)
The National Program for the Prevention of Allergic Diseases, including the determination of IgE concentrations in umbilical cord serum at birth began in 1986. Research was conducted to determine normal umbilical cord serum values in Cuban children since no previous research had been performed. The values consulted corresponded to children from other(More)
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