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Edgardo Ferretti Leticia Cagnina Viviana Paiz Sebastián Delle Donne Rodrigo Zacagnini Marcelo Errecalde 《Information processing & management》2018,54(6):1169-1181
In this work, we present the first quality flaw prediction study for articles containing the two most frequent verifiability flaws in Spanish Wikipedia: articles which do not cite any references or sources at all (denominated Unreferenced) and articles that need additional citations for verification (so-called Refimprove). Based on the underlying characteristics of each flaw, different state-of-the-art approaches were evaluated. For articles not citing any references, a well-established rule-based approach was evaluated and interesting findings show that some of them suffer from Refimprove flaw instead. Likewise, for articles that need additional citations for verification, the well-known PU learning and one-class classification approaches were evaluated. Besides, new methods were compared and a new feature was also proposed to model this latter flaw. The results showed that new methods such as under-bagged decision trees with sum or majority voting rules, biased-SVM, and centroid-based balanced SVM, perform best in comparison with the ones previously published. 相似文献
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Leticia Camacho 《Journal of Business & Finance Librarianship》2018,23(1):26-34
This article reports on a video project done in an academic library where faculty were included in the production and marketing of the library instruction videos. The videos allowed the librarian to provide a shorter presentation and spend most of her time working individually with each student. The results showed that 97% of the students watched the videos and were able to benefit from the content. The implementation of the videos was a success due to the collaboration of the professors teaching the three courses and the buy-in of the course coordinator; both factors were essential in the success of the video project. 相似文献
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ABSTRACTLibraries use surveys and other instruments to gather feedback from their users. However, with competition from many other campus entities requesting input, how can survey fatigue be avoided? To gather this feedback, the Social Sciences Reference Desk utilized a short, fun and easy method. Each week for 10 weeks during the fall semester of 2017, the reference assistants wrote a survey question on a whiteboard and provided sticky notes for patrons to write their answers. The survey provided valuable information about patrons’ needs and expectations. It also fostered changes that were easily implemented to improve the delivery of library services. 相似文献
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Leticia Canales Rodriguez Ricardo Blanco-Beledo 《International journal for the advancement of counseling》1993,16(3):205-212
Conclusion It is necessary to realize the limitations of counselling services in Mexico. In spite of all the efforts taken, the academic preparation of counsellors is not strong enough. As has been mentioned, 50% are psychologists or pedagogues, at best, and the rest, who are not specifically prepared for counselling, are constantly moving away from the helping services. There seems to be little progress. On the other hand, we hope that counselling and the counsellors, once services have been established, might some day be able to resolve those complex problems which the educational system has not been able to resolve or diminish with its own traditional resources, especially problems like school dropout, the correct choice of vocational and academic studies, the distribution of students to the various branches and levels of the educational system in accordance with the actual needs of the country, and a whole series of other tasks, which may fail in an area of myth or may really be related to the possibilities of the discipline. Therefore, it is necessary to set the limits of counsellors' tasks and to define the counsellor's role more clearly in the near future, in order to strengthen the discipline on behalf of our future students.Knowing, understanding and evaluating the relationship that now exists between the counselling tasks of counsellors, the educational Practice and the national and international policy, shall facilitate the future implementation of more solid and feasible programmes. For the time being, having a clear view of what we can do (and not only justifying things we cannot accomplish) should help our students to use our counselling services with higher benefits. 相似文献
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Sonia Martinez Antoni Aguilo Lluis Rodas Leticia Lozano Carlos Moreno 《Journal of sports sciences》2018,36(3):333-339
Adequate dietary strategies are essential for the successful participation in ultra-endurance races. The aim of this study was to evaluate and compare the energy and water intakes of participants during three different mountain ultra-endurance runs. The study took place at the “Ultra Mallorca Serra de Tramuntana” (Mallorca, Spain), an ultra-endurance mountain event with runners participating either in a 44-km (Marathon, n = 51), a 67-km (Trail, n = 109) or a 112-km (Ultra, n = 53) run competition. Participants in the study answered a questionnaire focused on the nutritional intake within an hour after finishing the competition. Mean energy intake during the competitions was 183 kcal · h¯1, with an average carbohydrate intake of 31 g · h¯1 (52.1% of participants consumed less than 30 g · h¯1). No significant differences between competitions were found in these parameters. However, a higher percentage of energy from lipids in participants in the Trail and the Ultra was found (P = 0.034). Furthermore, significant differences were observed in water intake per hour of competition (P = 0.039), with the lowest value for the intake during the Ultra competition. In conclusion, the majority of the participants in the study present low carbohydrate intakes. However, fluid intake seems to be adequate. Different distances did not significantly influence the participants’ nutritional strategies. 相似文献
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Leticia Gallegos-Cázares Fernando Flores-Camacho Elena Calderón-Canales Elvia Perrusquía-Máximo Beatriz García-Rivera 《Research in Science Education》2014,44(5):699-725
This paper presents the development and structure of indigenous children’s ideas about mixing colours as well as their ideas about each colour, derived from their traditions. The children were interviewed both at school and outside it, and an educational proposal was implemented. Ideas expressed in the school context were analysed using the partial possible model, which states that the inferences and explanations used to describe a subject consist of constricting ideas, rules of correspondence, and a set of phenomenological inferences about processes. After identifying these components in the children’s ideas, we developed models to describe their conceptions about mixing colours. We employed a different approach to analyse children’s ideas related to their cultural context. The results showed that children change from a conception that focuses on colours as entities that do not change and as properties of objects (model 1) to the idea that colour represents a quality of substances or objects that can be modified by mixing colours (model 2). Cultural context analysis showed that stories are independent from one another and that they are not connected to colour mixing processes, only to the actions of colour on people. We concluded that students generate independent constructions between school and cultural knowledge. 相似文献
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