Talent identification and selection process of outfield players and goalkeepers in a professional soccer club     

Susana María Gil  Jon Zabala-Lili  Iraia Bidaurrazaga-Letona  Badiola Aduna  Jose Antonio Lekue  Jordan Santos-Concejero 《Journal of sports sciences》2014,32(20):1931-1939

Abstract

The aim of this study was to analyse the talent identification process of a professional soccer club. A preselection of players (n = 64) aged 9–10 years and a final selection (n = 21) were performed by the technical staff through the observation during training sessions and matches. Also, 34 age-matched players of an open soccer camp (CampP) acted as controls. All participants underwent anthropometric, maturity and performance measurements.

Preselected outfield players (OFs) were older and leaner than CampP (P < 0.05). Besides, they performed better in velocity, agility, endurance and jump tests (P < 0.05). A discriminant analysis showed that velocity and agility were the most important parameters. Finally, selected OFs were older and displayed better agility and endurance compared to the nonselected OFs (P < 0.05). Goalkeepers (GKs) were taller and heavier and had more body fat than OFs; also, they performed worse in the physical tests (P < 0.05). Finally, selected GKs were older and taller, had a higher predicted height and advanced maturity and performed better in the handgrip (dynamometry) and jump tests (P < 0.05).

Thus, the technical staff selected OFs with a particular anthropometry and best performance, particularly agility and endurance, while GKs had a different profile. Moreover, chronological age had an important role in the whole selection process.  相似文献   

Anthropometric,physiological and maturational characteristics in selected elite and non-elite male adolescent basketball players     

Jon Torres-Unda  Idoia Zarrazquin  Javier Gil  Fátima Ruiz  Amaia Irazusta  Maider Kortajarena 《Journal of sports sciences》2013,31(2):196-203

Abstract

We investigated the anthropometric, physiological and maturation characteristics of young players (13–14 years old) associated with being successful in basketball. Body parameters were measured (stature, total body mass, skinfolds and lengths) and physiological capacities were assessed by endurance, sprint (20 m), jump and dribbling tests. Chronological age (CA) was recorded and maturity estimated using predicted age at peak height velocity (APHV). Anthropometric analysis indicated that elite players were taller, heavier and had a higher percentage of muscle. Further, physiological testing showed that these elite players perform better in jump, endurance, speed and agility tests (especially in the agility and ball tests). In addition, these skills are correlated with point average during the regular season. More basketball players born in the first semester of the year are selected and there is a predominance of early-maturing boys among those selected for the elite team. Those who are more mature have advantages in anthropometric characteristics and physiological test results. In conclusion, around puberty, physical and physiological parameters associated with maturity and CA are important in determining the success of basketball players. These findings should be taken into account by trainers and coaches, to avoid artificial bias in their selection choices.  相似文献   

The innovation potential of new infrastructure development: An empirical study of Heathrow airport's T5 project     

Nuno Gil  Marcela MiozzoSilvia Massini 《Research Policy》2012,41(2):452-466

We propose a conceptual framework to analyze technology adoption in mega infrastructure projects, and assess their potential to innovating large socio-technical systems. Drawing on an in-depth empirical analysis of Heathrow airport's Terminal 5 project, we find that innovation hinges on technology adoption decisions that are governed systematically by two intertwined determinants - assessment of expected profitability and development of absorptive capacity, both of which are distributed across various interdependent actors. On an ad hoc basis, technological decisions are also affected by other factors, namely attitudes toward risk, politics, and (lack of) established standards. We reveal how a schedule-driven project framing creates an underlying boundary condition that constrains the longitudinal process of building a ‘whole collective’ with capacity to absorb new technologies. The innovation potential of mega projects is thus subjected to a fundamental, unifying tension: on the one hand, they offer a one-off opportunity to invest in cutting-edge technologies and innovate socio-technical systems; on the other hand, project stakeholders have limited time to develop capacity to absorb novel technologies and negotiate differences on assessments of profitability and risk. Stakeholders may therefore be compelled to agree to adopt proven technologies upfront to reduce uncertainty and mitigate risks, thus limiting the innovation potential of new infrastructure development.  相似文献   

Meaningful Learning through Art: Nature Photography,Haiku Writing,Mobile Technologies and Social Media as a Path to Oneself     

Tali Gil 《The International Journal of Art & Design Education》2019,38(2):360-375

The article describes a workshop that combines nature photography and haiku poems writing with the use of smartphones in an outdoor educational setting. The workshop's purpose is to enhance the experience of being close to nature by observation and introspection. The participants use photography and haiku‐writing as means of visual and textual self‐expression. While wandering in nature, they take pictures and then write haiku poems inspired by them. Later they upload their photos to a WhatsApp forum created for the workshop. At this stage, they can write new haikus, inspired by the pictures taken by other participants, and upload them too. By the end of the day, the participants have a joint artistic product that contains all photos and haikus created at the workshop. The photographs that were chosen as samples for this article are analysed with interpretive tools based on semantic theory and Barthes’ methodology, and take into consideration the Photovoice method's principles. The poems were analysed considering their content and artistic measures and in comparison, with haiku writing's principles, and then compared to the photographs’ visual content. The analysis shows that observing nature through the camera's eye and writing poems while close to nature can generate self‐expression and introspection. The use of mobile technology in the workshop does not intrude on the experience of being in nature; on the contrary, it is used to get the participants closer to it and to each other. The workshop described here contributes to the experience of meaningful learning through art.  相似文献   

Short-term fun or long-term gain: a mixed methods empirical investigation into perceptions of truancy among non-truants in Flanders     

G. Keppens  B. Spruyt 《Educational studies》2015,41(3):326-340

The purpose of the present study is to explore non-truanting youngsters’ perceptions of truants and truancy. In-depth qualitative interviews (N: 8) are used to explore inductively the perceptions of truancy among non-truanting pupils in secondary education in Flanders (the Dutch-speaking part of Belgium). We use survey analysis (N: 3314) to assess the prevalence of different attitudes towards truancy and their mutual relationships, the prevalence of truants at school, individual risk factors for truancy, and school context variables. The results reveal two attitudes toward truancy: (1) disapproval of truancy and (2) the appeal of truancy. Factors that increased disapproval of truancy included attachment to school, attachment to parents, belief in school rules and cultural capital. Finding truancy attractive was associated with a lack of attachment to school and the presence of truants in the peer group. In the conclusion we elaborate on the implications of our findings.  相似文献   

Nutritional intake in soccer players of different ages     

Ruiz F  Irazusta A  Gil S  Irazusta J  Casis L  Gil J 《Journal of sports sciences》2005,23(3):235-242

The purpose of this study was to evaluate the dietary practices of soccer players of different ages. The diets of the members of four soccer teams (mean ages of 14.0, 15.0, 16.6 and 20.9 years, respectively) were examined. Our results show that the caloric intake per kilogram of body mass was significantly higher among the youngest players when compared with the adult players (P < 0.05). The contribution of carbohydrates to total energy intake was lower than that recommended for athletes. This contribution decreased with age from 47.4% of total energy intake for the 14-year-olds to 44.6% for the adult players. No significant differences in protein or total fat intake were detected among the teams examined. Overall, our results show that the nutritional intake of the soccer players was not optimal, and that this intake was poorer among the adult players than among the adolescents. On the basis of our results, we recommended that nutritional education should be given to soccer players at an early age and should continue throughout adolescence, not only with a view to improving performance but also to promoting more healthy dietary practices in the long term.  相似文献   

Communicative Antecedents of Political Persuasion: Political Discussion,Citizen News Creation,and the Moderating Role of Strength of Partisanship     

Alberto Ardèvol-Abreu  Matthew Barnidge  Homero Gil de Zúñiga 《Mass Communication and Society》2017,20(2):169-191

Although much attention has been paid to how media use and interpersonal discussion motivate people to engage in political persuasion, and despite recent efforts to study the role of digital media technologies, less is known about the creation of news and public affairs content online. This study sheds light on how online content creation works alongside other communicative behaviors, such as news use and political discussion, to affect attempted political persuasion. Using two-wave panel survey data, we find that political discussion and citizen news creation mediate the relationships between online and traditional news use, on one hand, and attempted persuasion, on the other. Furthermore, strength of partisanship moderates the relationship between content creation and attempted persuasion. Findings are discussed in light of their implications for the political communication and public sphere processes.  相似文献   

Second Screening and Political Persuasion on Social Media     

Matthew Barnidge  Homero Gil de Zúñiga  Trevor Diehl 《广播与电子媒介杂志》2017,61(2):309-331

This article seeks to explain political persuasion in relation to second screening—people’s use of a second screen (i.e., smartphone/laptop) while watching television to access further information or discuss TV programs. Employing a two-wave-panel survey in the United States, results show this emergent practice makes people more open to changing their political opinions, particularly among those who habitually use social media for news or frequently interact with others in social media contexts.  相似文献   

An online authoring tool for creating activity-based learning objects     

Jeong Yong Ahn  Gil Seong Mun  Kyung Soo Han  Sook Hee Choi 《Education and Information Technologies》2017,22(6):3005-3015

As higher education increasingly relies on e-learning, the need for tools that will allow teachers themselves to develop effective e-learning objects as simply and quickly as possible has also been increasingly recognized. This article discusses the design and development of a novel tool, Enook (Evolutionary note book), for creating activity-based learning objects (LOs). This tool has three general foci: 1) creation of various activity-based objects for experimental learning or learning by doing while simultaneously offering as many learning resources as a real e-book that services as both a textbook and a notebook, dual functions that paperback books can never provide; 2) management of all aspects of live instructor-led classroom training in a network environment, such the Web and or a mobile network; 3) facilitated use of data on students’ progress to monitor their understanding of the material and to provide other meaningful information through learning analytics.  相似文献   

Parochial Compliance: Young Children's Biased Consideration of Authorities’ Preferences Regarding Intergroup Interactions          下载免费PDF全文

Avi Benozio  Gil Diesendruck 《Child development》2017,88(5):1527-1535

Prosocial behavior is arguably influenced by an interaction between intrinsic dispositions (e.g., group bias) and extrinsic factors (e.g., institutional regulations). The current study investigated this interaction developmentally. Preschoolers (3‐ to 4‐year‐olds) and kindergarteners (5‐ to 6‐year‐olds; N = 111) participated in a resource distribution task in which they had to consider both the recipients’ group membership (minimal color‐based groups), and their own teachers’ preferences regarding how to distribute (give “all” or “none”). The results revealed that only kindergarteners were influenced by the experimental factors and differently across genders. Specifically, when the recommendation was to give “none,” girls followed it indiscriminately toward in‐ and out‐group recipients, but boys did so only toward out‐group recipients. Thus, boys exploited an authority's legitimization to act antisocially, according to a parochial bias.  相似文献