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1.
Lesly Alejandra Gonzalez Camacho Solange Nice Alves-Souza 《Information processing & management》2018,54(4):529-544
Recommender Systems are currently highly relevant for helping users deal with the information overload they suffer from the large volume of data on the web, and automatically suggest the most appropriate items that meet users needs. However, in cases in which a user is new to Recommender System, the system cannot recommend items that are relevant to her/him because of lack of previous information about the user and/or the user-item rating history that helps to determine the users preferences. This problem is known as cold-start, which remains open because it does not have a final solution. Social networks have been employed as a good source of information to determine users preferences to mitigate the cold-start problem. This paper presents the results of a Systematic Literature Review on Collaborative Filtering-based Recommender System that uses social network data to mitigate the cold-start problem. This Systematic Literature Review compiled the papers published between 2011–2017, to select the most recent studies in the area. Each selected paper was evaluated and classified according to the depth which social networks used to mitigate the cold-start problem. The final results show that there are several publications that use the information of the social networks within the Recommender System; however, few research papers currently use this data to mitigate the cold-start problem. 相似文献
2.
Vivian Maria Arakelian Cássia da Luz Goulart Renata Gonçalves Mendes Nuno Manoel de Sousa Renata Trimer Solange Guizilini 《Journal of sports sciences》2019,37(12):1420-1428
Aim was to identify critical load (CL) in young and elderly apparently healthy male cohorts. To contrast the metabolic, cardiovascular and perceptual responses on CL according to age. We evaluated 12 young (23 ± 3 years) and 10 elderly (70 ± 2 years) apparently healthy active males, who underwent: (1) 1 repetition maximum (1RM) test on a 45° Leg Press; (2) on different days, three high-intensity resistance exercise constant load tests (60%, 75% and 90% 1RM) until fatigue (Tlim). Absolute values of both the CL asymptote and curvature constant (kg) were significantly lower in elderly subjects (P < 0.05). In contrast, elderly subjects demonstrated a significantly higher number of repetitions at CL when compared with young subjects (P < 0.05). As expected, oxygen uptake (VO2) and heart rate (HR) during maximal aerobic exercise testing were significantly reduced in older subjects. However, percent-predicted aerobic capacity were higher in older subjects (P < 0.05). In addition, blood lactate ([La?]) corrected to Tlim and rating of perceived exertion values were greater in younger subjects at all intensities (P < 0.05). These findings, despite reduced force production in older subjects, endurance-related parameters are well preserved according to age-adjusted percent-predicted values in apparently healthy males. 相似文献
3.
Maykon A. P. Novais Monica Parente Ramos Solange A. Nappo Daniel Sigulem 《The American journal of distance education》2013,27(1):40-51
Abstract This study involved fourteen semistructured interviews with teaching staff at a Brazilian university. These interviews were aimed at unveiling possible transformations caused by distance education in classroom teaching and in medical assistance practices. The discourses collected were analyzed using qualitative methods and divided into groups with convergent meanings, resulting in the following units: Infrastructure, Personal Use of Information Technology Resources, Impressions of Distance Education, Intensity of Dedication, Interactivity, Benefits of Distance Education, Teaching Practices, and Changes in Assistance. Results suggest that virtual teaching has resulted in positive changes in the professor–student relationship that allow improvements in interactivity and the creation of different expectations from those observed in classroom practice. There was a significant appropriation of the technological resources and pedagogical activities used in online courses for classroom teaching practice. Also observed was the transfer of knowledge to the personal and medical assistance spheres. 相似文献
4.
This study examined the influence of the regression model and initial intensity of an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and the endurance performance. Sixteen non-competitive, recreational female runners performed a discontinuous incremental treadmill test. The initial speed was set at 7 km · h?1, and increased every 3 min by 1 km · h?1 with a 30-s rest between the stages used for earlobe capillary blood sample collection. Lactate-speed data were fitted by an exponential-plus-constant and a third-order polynomial equation. The lactate threshold was determined for both regression equations, using all the coordinates, excluding the first and excluding the first and second initial points. Mean speed of a 10-km road race was the performance index (3.04 ± 0.22 m · s?1). The exponentially-derived lactate threshold had a higher correlation (0.98 ≤ r ≤ 0.99) and smaller standard error of estimate (SEE) (0.04 ≤ SEE ≤ 0.05 m · s?1) with performance than the polynomially-derived equivalent (0.83 ≤ r ≤ 0.89; 0.10 ≤ SEE ≤ 0.13 m · s?1). The exponential lactate threshold was greater than the polynomial equivalent (P < 0.05). The results suggest that the exponential lactate threshold is a valid performance index that is independent of the initial intensity of the incremental test and better than the polynomial equivalent. 相似文献
5.
The goal of this study was to evaluate the effects of the joint training activities of a cooperating teacher and a university supervisor during an advisory visit on (a) the professional development of a preservice teacher's activity and (b) the reorganization of mentoring activity following this visit. The results are considered from a theoretical perspective based on cultural-historical psychology (Leontiev, A. (1984). Activity, consciousness, personality. Moscow: Progress Editions.; Vygotsky, L. S. (1978). Interaction between learning and development. In: M. Cole, V. John-Steiner, S. Scribner & E. Souberman (Eds.), Mind in society (pp. 79–91). Cambridge: Harvard University Press.; Vygotsky, L. S. (1997). Thought and language. Paris: La Dispute.; Vygotsky, L. S. (2003). Consciousness, the unconscious, emotions. Paris: La Dispute.) and the clinical study of activity (Clot, Y. (2003). Vygotsky, consciousness as liaison. In: Vygotsky, consciousness, the unconscious, emotions. Paris: La Dispute, pp. 7–59.; Clot, Y. (2004). Work between functioning and development. Bulletin de Psychologie, 57(1), 5–12.; Clot, Y. (2008). Work and the power to act. Paris: PUF.; Clot, Y., & Faïta, D. (2000). Types and styles in work analysis. Concepts and methods. Travailler, 6, 7–43.). The discussion focuses on the conditions that led to the greater effectiveness of the advisory visit, which is an integral part of teacher training programs that alternate classroom work with co-analysis of the work. Proposals are also made for new directions in training supervisors and cooperating teachers with a view to building a training team. 相似文献
6.
Tania C. Ara��jo-Jorge Tania S. Cardona Cl��udia L. S. Mendes Andrea Henriques-Pons Rosane M. S. Meirelles Cl��udia M. L. M. Coutinho Luiz Edmundo V. Aguiar Maria de Nazareth L. Meirelles Solange L. de Castro Helene S. Barbosa Mauricio R. M. P. Luz 《CBE life sciences education》2004,3(2):99-110
The advent of genomics, proteomics, and microarray technology has brought much
excitement to science, both in teaching and in learning. The public is eager to
know about the processes of life. In the present context of the explosive growth
of scientific information, a major challenge of modern cell biology is to
popularize basic concepts of structures and functions of living cells, to
introduce people to the scientific method, to stimulate inquiry, and to analyze
and synthesize concepts and paradigms. In this essay we present our experience
in mixing science and education in Brazil. For two decades we have developed
activities for the science education of teachers and undergraduate students,
using microscopy images generated by our work as cell biologists. We describe
open-air outreach education activities, games, cell modeling, and other
practical and innovative activities presented in public squares and
favelas. Especially in developing countries, science education is
important, since it may lead to an improvement in quality of life while
advancing understanding of traditional scientific ideas. We show that teaching
and research can be mutually beneficial rather than competing pursuits in
advancing these goals. 相似文献
7.
Robbie S Wilson Nicholas M A Smith Solange de Paula Ramos Fabio Giuliano Caetano Marcio Aparecido Rinaldo Paulo Roberto Pereira Santiago 《Journal of sports sciences》2019,37(9):1072-1079
This study assessed whether a new, closed-skill dribbling or sprinting task could predict attacking performance in soccer. Twenty-five male players were recruited from the Londrina Junior Team Football Academy in Brazil and asked to either dribble the ball or sprint through five custom circuits that varied in average curvature (0–1.37 radians.m?1). These measures were then validated using a realistic one vs. one competition in which each player acted as attacker or defender in turn (N = 1330 bouts). Sprinting (ICC = 0.96) and dribbling (ICC = 0.97) performances were highly repeatable for individual players. Average dribbling speed decreased non-linearly with increasing circuit curvature (F = 239.5; P < 0.001) from 5.19 ± 0.11 ms?1 on the straightest path to 2.13 ± 0.03 ms?1 on the curviest. Overall, dribbling but not sprinting performance predicted attacking success in the one vs. one competition, explaining more than 50% of the variation in attacking success alone (rp = 0.70; P < 0.001). In conclusion, our new closed-skill dribbling assessment is a valid and reliable protocol to predict a soccer player’s success in attacking performance in one vs. one situation, and can be used to identify talented players. 相似文献
8.
Many Child Protective agencies in the United States have guidelines for referring certain kinds of abuse/neglect cases for psychiatric-psychological assessments which leave up to the referring agent such decisions as: choice of assessor (psychiatrist, psychologist, other), purpose of evaluation, and part of the family system to be evaluated. In order to develop a more systematic approach to comprehensive evaluations of abusive families, the referral process from the Hawaii Child Protective Services Agency to a child guidance center was analyzed through chart review, and its influence on the outcome of psychiatric-psychological assessments was examined. Evaluations by psychiatrists were also compared with those of psychologists. The results showed that the great majority of the cases referred for assessment were victim-children and that recommendations paralleled this trend by being child rather than adult or family oriented. In addition, referral questions and resulting recommendations centered more on diagnosis than on issues of intervention (treatment, placement, legal needs), suggesting an underutilization of the assessors' clinical skills. Differences between psychiatrists and psychologists are also reported. These findings point to a need for greater commitment to family pathology. Implications for developing more effective referral guidelines and for training are discussed. 相似文献
9.
Solange Denervaud Jean‐Franois Knebel Mary Helen Immordino‐Yang Patric Hagmann 《Mind, Brain, and Education》2020,14(2):167-175
Through performance monitoring individuals detect and learn from unexpected outcomes, indexed by post‐error slowing and post‐error improvement in accuracy. Although performance monitoring is essential for academic learning and improves across childhood, its susceptibility to educational influences has not been studied. Here we compared performance monitoring on a flanker task in 234 children aged 4 through 15, from traditional or Montessori classrooms. While traditional classrooms emphasize that students learn from teachers' feedback, Montessori classrooms encourage students to work independently with materials specially designed to support learners discovering errors for themselves. We found that Montessori students paused longer post‐error in early childhood and, by adolescence, were more likely to self‐correct. We also found that a developmental shift from longer to shorter pauses post‐error being associated with self‐correction happened younger in the Montessori group. Our findings provide preliminary evidence that educational experience influences performance monitoring, with implications for neural development, learning, and pedagogy. 相似文献
10.