Revisión de los estudios orientados a la medición de las capacidades tecnológicas por medio de la literatura patente. Propuesta de análisis estadístico y evaluación de la calidad de una base de datos en patentes

El desarrollo de los estudios estadísticos y bibliométricos de la literatura patente fueron iniciados en España por diversos autores, que luego consideraremos. Se revisan los criterios destinados a la creación de una base de datos denominada Recodificacion. SAV para el análisis y tratamiento estadístico de 13.913 patentes españolas depositadas en la Oficina Española de Patentes y Marcas (OEPM).The development of statistical and bibliometrics studies of patents literature were begun in Spain by various authors who will be considered later. Review has been carried out of the criteria for the creation of a database entitled Recodification. SAV for the analysis and statistical treatment of 13,913 Spanish patents deposited in the Spanish Patents and Trademarks Office

The Best-or-Worst and the Postdoc problems

We consider two variants of the secretary problem, the\emph{ Best-or-Worst} and the \emph{Postdoc} problems, which are closely related. First, we prove that both variants, in their standard form with binary payoff 1 or 0, share the same optimal stopping rule. We also consider additional cost/perquisites depending on the number of interviewed candidates. In these situations the optimal strategies are very different. Finally, we also focus on the Best-or-Worst variant with different payments depending on whether the selected candidate is the best or the worst

Risk factors for incidence and persistence of disability in chronic major depression and alcohol use disorders: longitudinal analyses of a population-based study

BackgroundMajor depression and alcohol use disorders are risk factors for incidence of disability. However, it is still unclear whether a chronic course of these health conditions is also prospectively associated with incidence of disability. The aim of the present study was, first, to confirm whether chronic major depression (MD) and alcohol use disorders (AUD) are, respectively, risk factors for persistence and incidence of disability in the general population; and then to analyze the role of help-seeking behavior in the course of disability among respondents with chronic MD and chronic AUD. MethodData from two assessments in the National Epidemiologic Survey on Alcohol and Related Conditions were analyzed. Disability was measured by eight domains of the Short Form 12 Health Survey version 2 (SF-12). Generalized estimating equations and logistic regression models were run to estimate risk factors for persistence and incidence of disability, respectively. ResultsAnalyses conducted on data from the US general population showed that chronic MD was the strongest risk factor for incidence and persistence of disability in the social functioning, emotional role and mental health domains. Chronic AUD were risk factors for incidence and persistence of disability in the vitality, social functioning, and emotional role domains. Within the group of chronic MD, physical comorbidity and help-seeking were associated with persistent disability in most of the SF-12 domains. Help-seeking behavior was also associated with incidence of problems in the mental health domain for the depression group. Regarding the AUD group, comorbidity with physical health problems was a strong risk factor for persistence of disability in all SF-12 domains. Help-seeking behavior was not related to either persistence or incidence of disability in the chronic alcohol group. ConclusionsChronic MD and chronic AUD are independent risk factors for persistence and incidence of disability in the US general population. People with chronic MD seek help for their problems when they experience persistent disability, whereas people with chronic AUD might not seek any help even if they are suffering from persistent disability.<br/

Nautas baleáricos durante la Prehistoria (parte II). De la iconografía naval a las fuentes históricas

Tradicionalmente la historiografía no ha tenido en consideración jamás los aspectos náuticos de las culturas insulares baleáricas durante la Prehistoria. En este artículo (I y II) se estudian en primer lugar las condiciones oceanográficas características del mar balear, tanto en las bases climáticas cálidas, como en los periodos fríos del Holoceno. Analizaremos también varios grupos de fuentes documentales que permiten sostener la existencia de un dominio mínimo de las técnicas de navegación que hicieron posible los contactos entre las islas durante la Edad del Bronce y otros indicios de la Edad del Hierro. Se estudian igualmente algunos documentos iconográficos y varias fuentes escritas.Traditionally, written history has never taken into account nautical aspects of the Balearic Islands’ prehistoric cultures, not even superficially. In this paper (I and II), an analysis will be made of oceanographic conditions characteristic of the Balearic Sea during warm climatic phases and cold periods of the Holocene. A study will also be made of several groups of documental sources that point to the existence of a minimum knowledge of sailing techniques able to facilitate Bronze Age inter-island contact, together with other Iron Age indications. Likewise, certain iconographic documents and several written sources are also examined

Nautas baleáricos durante la Prehistoria (parte I). Condiciones meteomarinas y navegación de cabotaje

Tradicionalmente, la historiografía no ha tenido en consideración jamás los aspectos náuticos de las culturas insulares baleáricas durante la Prehistoria. En este artículo se estudian en primer lugar (parte I) las condiciones oceanográficas características del mar balear, tanto en las fases climáticas cálidas, como en los periodos fríos del Holoceno. Analizaremos también varios grupos de fuentes documentales que permiten sostener la existencia de un dominio mínimo de las técnicas de navegación que hicieron posible los contactos entre las islas durante la Edad del Bronce y otros indicios de la Edad del Hierro. Se estudian igualmente (parte II) algunos documentos iconográficos y varias fuentes escritas.Traditionally, written history has never taken into account nautical aspects of the Balearic Islands’ prehistoric cultures, not even superficially. In this paper (part I), an analysis will be made of oceanographic conditions characteristic of the Balearic Sea during warm climatic phases and cold periods of the Holocene. A study will also be made of several groups of documental sources that point to the existence of a minimum knowledge of sailing techniques able to facilitate Bronze Age inter-island contact, together with other Iron Age indications. Likewise (part II), certain iconographic documents and several written sources are also examined

Canarias en el contexto de las navegaciones atlánticas de la Antigüedad

El presente artículo pretende analizar, desde perspectivas náuticas, los problemas de acceso a las islas Canarias con la tecnología propiade la protohistoria y la antigu?edad; por extensión, se estudia también las navegaciones antiguas por la cota africana hasta la actualMogador. Se hace una revisión crítica de las hipótesis mantenidas hasta ahora por algunos investigadores, según las cuales las islashabrían tenido una ocupación fenicia y púnica de las islas. Por último, se analizan grabados rupestres canarios de temática naval, algunosde los cuales pudieron corresponder a barcas aborígenes