1,721,136 research outputs found
Comercialización informal de Cactáceas en las cercanías de Loreto, provincia de Santiago del Estero, Argentina
Full text linkFil: Demaio, P. Universidad Nacional de Córdoba. Museo Botánico de Córdoba; Argentina.Fil: Demaio, P. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Demaio, P. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Vegetal ll; Argentina.Fil: Trillo, C. Universidad Nacional de Córdoba. Museo Botánico de Córdoba; Argentina.Fil: Trillo, C. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Trillo, C. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Vegetal ll; Argentina.El comercio de cactus silvestres podría representar una actividad económica sustentable para
pobladores de zonas áridas, aunque ha sido mencionado como un factor que podría afectar a las
poblaciones naturales.Fil: Demaio, P. Universidad Nacional de Córdoba. Museo Botánico de Córdoba; Argentina.Fil: Demaio, P. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Demaio, P. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Vegetal ll; Argentina.Fil: Trillo, C. Universidad Nacional de Córdoba. Museo Botánico de Córdoba; Argentina.Fil: Trillo, C. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Multidisciplinario de Biología Vegetal; Argentina.Fil: Trillo, C. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Cátedra de Diversidad Vegetal ll; Argentina.Conservación de la Biodiversida
Understanding Public Attitudes to Bike-Sharing in Gothenburg
No full textA predominately car-oriented transport has been the cornerstone of urban development in a worldwide scale for decades now; a cornerstone that is associated mostly with the short-term individualistic benefit of the road user in terms of comfort and convenience, but also with severely adverse effects on societal and environmental sustainability. The problem for society – and policy – is therefore how to retain the social and economic benefits linked to mobility while reducing the negative environmental, economic and social impacts from transport. Considering this and the ever-increasing number of people who live in cities, the development and promotion of alternative social, attitudinal, behavioural and technological niches to the current automobile-focused transport regime is needed more than ever before. One of the prime non-regulatory frameworks to promote this transition to a more sustainable transport paradigm refers to the shared-use of mobility innovation mechanisms. Bike-sharing is perhaps the most characteristic and greener example of this sort of alternative transport solutions. It can be described as a short-term bicycle rental service for inner-city transportation providing bikes at unattended stations. Bike-sharing systems have been introduced as a means to extend the reach of public transit services to final destinations in a way that promotes the development of sustainable and aesthetically pleasing urban environments that prioritize people over cars. The most distinctive function of such a scheme however, is clearly the concept of “sharing” since individuals use bicycles on an “as-needed” basis without the costs and responsibilities of bicycle ownership. Despite the vast potential of bike-sharing outlined herein and more importantly despite the numerous (at least 500) schemes of variable sizes and types that run in more than 50 countries worldwide, the impact of its use and the factors that can make it successful or not constitute a topic that is still only modestly negotiated by research. This abstract refers to a study aiming to frame the attitudes of people towards the rapidly expanding bike-sharing scheme of Gothenburg some of them referring to their experience of the scheme as users.Gothenburg has in place Styr & Ställ, which is a self-service bike rental system, spread across 62 stations throughout the city centre with an excess of 600 bicycles. This fairly inexpensive system can be accessed 24 hours a day and seven days a week between 1st of March to 31st of October. Approximately 50,000 annual users signed up in 2012 for using this service (including tourists) a number that has really forced the rapid expansion of the scheme in what it is today and calls for research pointing to two directions; research that could either attempt to captivate what it seems to be a formula for success or understand how a scheme with such a potential could become even more publicly acceptable.A number in excess of 500 fully completed questionnaires were collected and analyzed. The respondents believed in general that cycling could be a sustainable, cost-saving, healthy, pleasant mode capable of reducing road traffic congestion. 90% of them agreed or strongly agreed that more bicycle-related investments are necessary for Gothenburg. More importantly though, only an insignificant proportion of the respondents (approximately 1.5% of them) disagreed or strongly disagreed with the notion that Styr and Ställ is a good scheme for the city. The respondents believed that Styr and Ställ is a pro-environmental, inexpensive and healthy travel option, which complements the other existing public transport services and promotes a more human-friendly identity for the city. The vast majority of them also believed that public bicycles provide a viable service for the city that should expand to more areas. Despite these positive attitudes and although at least one out of four respondents cycle in a daily basis and more than half of them use a bike regularly, very few of them ride a public bicycle: almost 85% of them don’t or use it rarely. More than 40% of the respondents though reported that they do that because they use their own bicycles, while an excess of 30% considered that there is still a lack of good public bicycle related infrastructure in the city. Another finding of the study is that quite a few people find neither the bicycles nor the rental stations particularly attractive and they do not see a need for electrical bicycles. All in all, even the majority of the respondents that self-reported a small likelihood to ever use systematically public bicycles was positive towards the scheme
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Hydroxyapatite VS porous coated femoral stems prospective study at 3 yrs follow-up. Vol 12, n°2, pp168, Apr-June.
No full textVariations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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