53 resultados para Perspective views
Resumo:
More and more academic journals adopt an open-access policy, by which articlesare accessible free of charge, while publication costs are recovered through authorfees. We study the consequences of this open access policy on a journal s qualitystandard. If the journal s objective was to maximize social welfare, open accesswould be optimal as long as the positive externalities generated by its diffusionexceed the marginal cost of distribution. However, we show that if an open accessjournal has a different objective (such as maximizing readers payoffs, the impactof the journal or its profit), it tends to choose a quality standard below the sociallyefficient level.
Resumo:
In 1921 Mexico produced a quarter of world s petroleum, making the country the secondlargest producer in the world, but by 1930 it only accounted for 3 per cent of world sproduction. To date the discussion has mostly relied on events taking place in Mexico forexplaining the decline of the industry. Very little attention has been placed todevelopments in petroleum industry elsewhere, except Venezuela. Practically noattention has been paid to the reasons for the rise of oil output in Mexico. This neglectsthe massive changes taking place in the petroleum industry worldwide during the GreatWar years and its aftermath, and overall ignores the shortage of oil that occurred in theworld s markets between 1918-1921. These are crucial events in order to understand theearly rise of the Mexican oil industry and set the basis for a better understanding of thesubsequent sudden decline.
Resumo:
When preparing an article on image restoration in astronomy, it is obvious that some topics have to be dropped to keep the work at reasonable length. We have decided to concentrate on image and noise models and on the algorithms to find the restoration. Topics like parameter estimation and stopping rules are also commented on. We start by describing the Bayesian paradigm and then proceed to study the noise and blur models used by the astronomical community. Then the prior models used to restore astronomical images are examined. We describe the algorithms used to find the restoration for the most common combinations of degradation and image models. Then we comment on important issues such as acceleration of algorithms, stopping rules, and parameter estimation. We also comment on the huge amount of information available to, and made available by, the astronomical community.
Resumo:
This study presents new evidence concerning the uneven processes of industrialization innineteenth century Spain and Italy based on a disaggregate analysis of the productivesectors from which the behaviour of the aggregate indices is comprised. The use of multivariate time-series analysis techniques can aid our understanding and characterization of these two processes of industrialization. The identification of those sectors with key rolesin leading industrial growth provides new evidence concerning the factors that governed thebehaviour of the aggregates in the two economies. In addition, the analysis of the existenceof interindustry linkages reveals the scale of the industrialization process, and wheresignificant differences exist, accounts for many of the divergences recorded in the historiography for the period 1850-1913.
Resumo:
This study presents new evidence concerning the uneven processes of industrialization innineteenth century Spain and Italy based on a disaggregate analysis of the productivesectors from which the behaviour of the aggregate indices is comprised. The use of multivariate time-series analysis techniques can aid our understanding and characterization of these two processes of industrialization. The identification of those sectors with key rolesin leading industrial growth provides new evidence concerning the factors that governed thebehaviour of the aggregates in the two economies. In addition, the analysis of the existenceof interindustry linkages reveals the scale of the industrialization process, and wheresignificant differences exist, accounts for many of the divergences recorded in the historiography for the period 1850-1913.
Resumo:
The aims of this study are to consider the experience of flow from a nonlinear dynamics perspective. The processes and temporal nature of intrinsic motivation and flow, would suggest that flow experiences fluctuate over time in a dynamical fashion. Thus it can be argued that the potential for chaos is strong. The sample was composed of 20 employees (both full and part time) recruited from a number of different organizations and work backgrounds. The Experience Sampling Method (ESM) was used for data collection. Once obtained the temporal series, they were subjected to various analyses proper to the com- plexity theory (Visual Recurrence Analysis and Surrogate Data Analysis). Results showed that in 80% of the cases, flow presented a chaotic dynamic, in that, flow experiences delineated a complex dynamic whose patterns of change were not easy to predict. Implications of the study, its limitations and future research are discussed.
Resumo:
This research paper provides the basis of a future doctoral thesison the construction of foreign news. We aim to highlight similarities and differences in the online news coverage of the nationalist movments in Scotland and Catalonia in the Canadian Anglophone and Francophone press. Through a qualitative and quantitative content analysis of The Montreal Gazette, The National Post, The Globe and Mail, Le Devoir and La Presse, we attempt to show the frames used in the coverage of the political developments in both “stateless regions” from January 2011 to September 2014, when a referendum on the constitutional status of Scotland has beenagreed on. In parallel to the analysis of daily online newspapers, we will use semi-structured interviews of journalists from each news organization to obtain more in-depth knowledge of the factors influencing the construction of news. Lastly, we want to find out to the extent to which the coverage on the nationalist movements in Scotland and Catalonia serve to revive the debate on the independence question of Québec
Resumo:
El creciente número de hablantes no nativos de inglés en el mundo constituye la base a partir de la cual se han hecho recientes afirmaciones alrededor de la necesidad de enfatizar el papel del inglés como lingua franca en las clases de inglés. Este artículo investiga la visión de los profesores catalanes de inglés al respecto mediante un cuestionario centrado en aspectos como la preferencia de profesores nativos o no nativos, el conocimiento cultural idóneo para el profeso- rado de inglés, y la variedad de inglés escogida. Los resultados indican que el profesorado está influido por la supremacía del hablante nativo y una visión del inglés todavía restringida a las comunidades de hablantes nativos, con algunas diferencias significativas encontradas entre distintos grupos de profesores.
Resumo:
Antisocial and criminal behaviors are multifactorial traits whose interpretation relies on multiple disciplines. Since these interpretations may have social, moral and legal implications, a constant review of the evidence is necessary before any scientific claim is considered as truth. A recent study proposed that men with wider faces relative to facial height (fWHR) are more likely to develop unethical behaviour mediated by a psychological sense of power. This research was based on reports suggesting that sexual dimorphism and selection would be responsible for a correlation between fWHR and aggression. Here we show that 4,960 individuals from 94 modern human populations belonging to a vast array of genetic and cultural contexts do not display significant amounts of fWHR sexual dimorphism. Further analyses using populations with associated ethnographical records as well as samples of male prisoners of the Mexico City Federal Penitentiary condemned by crimes of variable level of inter-personal aggression (homicide, robbery, and minor faults) did not show significant evidence, suggesting that populations/individuals with higher levels of bellicosity, aggressive behaviour, or power-mediated behaviour display greater fWHR. Finally, a regression analysis of fWHR on individual"s fitness showed no significant correlation between this facial trait and reproductive success. Overall, our results suggest that facial attributes are poor predictors of aggressive behaviour, or at least, that sexual selection was weak enough to leave a signal on patterns of between- and within-sex and population facial variation.
Resumo:
Background: Previous studies emphasise the importance of the biological family to the welfare of fostered adolescents. However, the majority of these studies only take into consideration the viewpoints of the professionals, foster parents and biological parents not those of the adolescents themselves. For this reason little is known about the perceptions the adolescents have and the needs they express. Method: This study has gathered data from 57 adolescents in kinship family fostering in Spain (AFE). The study applied qualitative reseach, using focus groups to gather data and the Atlas.ti programme to analyse the data. The qualitative data give us a more profound understanding of how the fostered adolescents relate to their biological families. Results: The results highlight the specific needs of these adolescents a) an understanding of their family history b) the impact of visits from and relationship with their biological family and c) the relationship between the biological family and the foster family. Conclusions: These findings reveal implications to consider when creating support programmes aimed at this group.
Resumo:
Freshwater ecosystems and their biodiversity are presently seriously threatened by global development and population growth, leading to increases in nutrient inputs and intensification of eutrophication-induced problems in receiving fresh waters, particularly in lakes. Climate change constitutes another threat exacerbating the symptoms of eutrophication and species migration and loss. Unequivocal evidence of climate change impacts is still highly fragmented despite the intensive research, in part due to the variety and uncertainty of climate models and underlying emission scenarios but also due to the different approaches applied to study its effects. We first describe the strengths and weaknesses of the multi-faceted approaches that are presently available for elucidating the effects of climate change in lakes, including space-for-time substitution, time series, experiments, palaeoecology and modelling. Reviewing combined results from studies based on the various approaches, we describe the likely effects of climate changes on biological communities, trophic dynamics and the ecological state of lakes. We further discuss potential mitigation and adaptation measures to counteract the effects of climate change on lakes and, finally, we highlight some of the future challenges that we face to improve our capacity for successful prediction.
Resumo:
Internationalization strategies and the European Space of Higher Education are causing a growing interest in English medium instruction (EMI). University linguistic and internationalization policies are attempting to provide lectures with the required training and education. Linguists can supply not only the knowledge of the language but the knowledge about language which may enable lecturers to increase their academic language competence autonomously. This paper presents a framework for the analysis of lecturers’ discourse to trigger reflection about the linguistic needs in CLIL/EMI contexts.
Resumo:
La transición a la edad adulta y vida activa es un proceso extremadamente complejo para los jóvenes con discapacidad. Para plantear propuestas de actuación que mejoren sus oportunidades de conseguir objetivos relacionados con la inclusión laboral y social en la vida adulta es imprescindible el diagnóstico en profundidad del contexto en que se construyen y desarrollan los procesos de transición. En este artículo se presenta un estudio en el que se ha aplicado el método Delphi con el propósito de obtener datos sobre la adecuación de los servicios o dispositivos que trabajan con jóvenes con discapacidad a lo largo de su proceso de transición a la edad adulta y vida activa, tanto en el escenario escolar como en el postescolar. Se han constituido dos paneles de expertos, uno con profesionales del ámbito educativo y otro con profesionales que trabajan en servicios postescolares. En ambos casos, los ejes temáticos son: visión del proceso de transición, aspectos curriculares y organizativos de los servicios, existencia de itinerarios de apoyo sistematizados, trabajo colaborativo entre profesionales, acciones de orientación con familias, adecuación de las alternativas postescolares, la formación de los profesionales, y coordinación de servicios. El análisis de los cuestionarios permite constatar las principales dificultades percibidas por los expertos en cada uno de los ámbitos y establece líneas básicas de actuación para mejorar los procesos de tránsito, entre las cuales destaca la necesidad de reforzar el papel de los equipos multiprofesionales en la articulación de redes de trabajo interprofesional
Resumo:
This study sought to assess the impact of health care professional (HCP) communication on breast cancer patients across the acute care process as perceived by patients. Methodological approach was based on eight focus groups conducted with a sample of patients (n ¼ 37) drawn from 15 Spanish Regions; thematic analysis was undertaken using the National Cancer Institute (NCI) framework of HCP communication as the theoretical basis. Relevant results of this study were the identification of four main communication components: (1) reassurance in coping with uncertainty after symptom detection and prompt access until confirmed diagnosis; (2) fostering involvement before delivering treatments, by anticipating information on practical and emotional illness-related issues; (3) guidance on the different therapeutic options, through use of clinical scenarios; and, (4) eliciting the feeling of emotional exhaustion after ending treatments and addressing the management of potential treatment-related effects. These communication-related components highlighted the need for a comprehensive approach in this area of cancer care