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101.
Ben Piggott Sean Müller Paola Chivers Carmen Papaluca Gerard Hoyne 《European Journal of Sport Science》2019,19(3):267-286
Sports science research is traditionally monodisciplinary despite calls for an interdisciplinary focus. The primary purpose of this systematic review was to identify studies on talent identification, talent selection and competition performance to determine whether interdisciplinary research is being conducted. Thirty-six studies met the selection criteria. These studies were critiqued relative to sport, skill level, sport science sub-disciplines included, and whether the research was multidisciplinary or interdisciplinary. The secondary purpose of the review was to critique the level of analysis and level of representative task design in performance tests used in the studies. Twenty-five studies were categorised as interdisciplinary, with 11 categorised as multidisciplinary. Thirteen sports were represented with soccer the most frequent followed by field hockey, Australian Rules football, handball and rugby league. Thirty-two studies completed their analysis at a group level and four at an individual level. A total of 337 performance tests were rated for representative task design with 64 categorised as low, 123 as medium and 150 as high. The results pertaining to interdisciplinary studies and individual analyses are discussed in relation to constraints theory, which predicts that interacting variables can explain sport performance. Sports science research is beginning to fulfil the call for interdisciplinary research. Future research, however, needs to consider individual analyses and representative task design of tests to progress sports science knowledge. 相似文献
102.
Emiliano Carretti Irene Natali Caterina Matarrese Paola Bracco Richard G. Weiss Piero Baglioni Antonella Salvini Luigi Dei 《Journal of Cultural Heritage》2010,11(4):1555-380
The procedures for making and applying a new family of high viscosity aqueous polymeric dispersions based on poly(vinyl alcohol)-borax (PVA-borax) matrices are presented. A specific system of this type has been used to remove an oxidized varnish coating from the surface of “Coronation of the Virgin with Saints”, a 15th century egg tempera painting on wood by Neri di Bicci (Florence, 1418–1492). FTIR spectra showed that the oxidized varnish was constituted of highly aged shellac resin. Good cleaning performance was attained when the liquid portion of the dispersion consisted of a mixture of water and acetone. Rheological investigations indicate that the acetone content does not affect the mechanical properties of the polymeric dispersion. Those mechanical properties permit easy removal of the cleaning agent simply by peeling it from the surface by means of a forceps or spatula once it has carried out its cleaning function. Optical microscopic and FTIR investigations show that the cleaning agent is able to remove the oxidized varnish coating from the surface of the Neri di Bicci painting without leaving detectable residues. 相似文献
103.
The hypothesis that there is a greater frequency of children of alcoholics in special classes for Emotional/Behavioral Disordered (ED) and Learning Disabled (LD) children was explored. A random sample of students in ED, LD, and regular classes was selected and administered the Children of Alcoholics Screening Test. Parents completed the Friel Co-Dependency Assessment Inventory. An analysis of variance in CAST and FCAI scores did not reveal any significant differences among groups. Significant differences were noted in the relationship of marital status and chemical dependency in immediate family. Reported incidence of chemical dependency in the immediate family was identified as a concern warranting further exploration. Issues that may have affected the study such as sample size, respondent participation, and various roles exhibited in the family were considered. The possible impact alcoholism has on children and appropriate program intervention in the schools were discussed. 相似文献
104.
Tom Broos Isabel Hilliger Mar Pérez-Sanagustín Nyi-Nyi Htun Martijn Millecamp Paola Pesántez-Cabrera Lizandro Solano-Quinde Lorena Siguenza-Guzman Miguel Zuñiga-Prieto Katrien Verbert Tinne De Laet 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):938-954
Many Latin-American institutions recognise the potential of learning analytics (LA). However, the number of actual LA implementations at scale remains limited, notwithstanding considerable effort made to formulate guidelines and frameworks to support the LA policy development. Guidance on how to coordinate the interaction between the LA policymaking and implementation is mostly missing, leaving a difficult challenge up to practitioners. In this study we propose a coordination model to support future LA initiatives at scale. We explore the problem by comparing two cases in Belgium and Ecuador. Following up we use the LA implementation timeline as a driver for planning the interaction between the policymaking and implementation. We continue by testing an application of the model with LA experts predominantly from Latin-American institutions, asking them to map low-level items of the SHEILA policy framework to four implementation phases. The results of this mapping support that LA policy building can be spread over time, that it can coincide with LA implementation at scale, and that both efforts can be coordinated. It is hoped that this study will provide additional guidance for future Latin-American and other LA initiatives. 相似文献
105.
The goal of this article is to contribute to understanding the interplay between students' disciplinary engagement and their identity construction. The term appropriation, borrowed from scholars in linguistics and education, was chosen to capture this broader sense of productive learning that sits at the nexus of disciplinary engagement and identity. Appropriation implies deep conceptual understanding, but it also involves a reflexive process of transforming scientific discourse in a way that is authentic and personal. The core aim of this article is to turn the term appropriation into a theoretical construct by means of an analytic process of defining, operationalizing, and testing the definition against student interview and classroom data. Five discourse markers for operationalizing appropriation were discovered through this process. Appropriation, in our study, implies students’ discourse is (A) an expression of a personal “signature“ idea, (B) grounded in the discipline, (C) thick, in that it involves a metacognitive and epistemological dimension, (D) non-incidental, in the sense of being consistently used throughout classroom activities, and (E) a carrier of social relationships, in that it positions the student within classroom. The study is grounded in an extended intervention on thermodynamics in an Italian secondary school class (grade 12). 相似文献
106.
This study explored how a study abroad experience affected preservice teachers' (PSTs') dispositions towards and plans for teaching English Language Learners (ELLs). This qualitative study involved 16 elementary education initial licensure PSTs who participated in a 2-month study abroad trip to Germany. Data in the form of surveys, interviews, and reflections were collected. The PSTs' experiences left them feeling like outsiders, fostering greater empathy for ELLs. As the PSTs faced the challenges of studying abroad, they developed ways of coping, which influenced their dispositions toward ELLs and the accommodations they wanted to make when teaching ELLs in their future classrooms. A model of the PSTs' learning progression within the study abroad experience is offered as a lens to consider their transformations. Findings suggest it would be beneficial for educators traveling abroad with PSTs to find ways to make explicit the connections between personal encounters and future teaching experiences. 相似文献
107.
108.
This paper focuses particularly on the role of municipal science consultants in developing and maintaining network activities and connections among primary school science teachers. The hypothesis is that consultants play a crucial role in supporting strategic planning, and sustaining contacts and activities within professional learning networks. The research is framed by a project that involved 80 primary science teachers in 20 schools. The aim of the project was to develop network activities that facilitate sustainable change of the participating schools’ collective culture and practice of science teaching. The authors were involved as researchers and evaluators in the project. Data consist of reports from the consultants about their participation in various network activities, school assessment reports and a longitudinal survey. Three distinct cases are analysed through the use of a framework of professional learning networks to assess the consultants’ opportunities and constraints in terms of participating in network development. The results indicate that the consultants’ roles in successful network formation is characterized by personal stable contacts within the science teacher community in the municipality, availability of municipal resources to support network activities, participation in strategic planning of municipal network support, and facilitation of the development of new teaching activities within schools or in collaboration between schools. These four distinctive features of municipal science consultants’ participation in supporting network activities enable the participants to share and develop teaching activities. 相似文献
109.
Giuseppe Lippi Paola Avanzini Roberta Musa Franca Sandei Rosalia Aloe Gianfranco Cervellin 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(1):64-69
Background:
In vitro hemolysis can be induced by several biological and technical sources, and may be worsened by forced aspiration of blood in vacuum tubes. This study was aimed to compare the probability of hemolysis by drawing blood with a commercial evacuated blood collection tube, and S-Monovette used either in the “vacuum” or “aspiration” mode.Materials and methods:
The study population consisted in 20 healthy volunteers. A sample was drawn into 4.0 mL BD Vacutainer serum tube from a vein of one upper arm. Two other samples were drawn with a second venipuncture from a vein of the opposite arm, into 4.0 mL S-Monovette serum tubes, by both vacuum an aspiration modes. After separation, serum potassium, lactate dehydrogenase (LD) and hemolysis index (HI) were tested on Beckman Coulter DxC.Results:
In no case the HI exceed the limit of significant hemolysis. As compared with BD Vacutainer, no significant differences were observed for potassium and LD using S-Monovette with vacuum method. Significant increased values of both parameters were however found in serum collected into BD Vacutainer and S-Monovette by vacuum mode, compared to serum drawn by S-Monovette in aspiration mode. The mean potassium bias was 2.2% versus BD Vacutainer and 2.4% versus S-Monovette in vacuum mode, that of LD was 2.7% versus BD Vacutainer and 2.1% versus S-Monovette in vacuum mode. None of these variations exceeded the allowable total error.Conclusions:
Although no significant macro-hemolysis was observed with any collection system, the less chance of producing micro-hemolysis by S-Monovette in aspiration mode suggest that this device may be used when a difficult venipuncture combined with the vacuum may increase the probability of spurious hemolysis. 相似文献110.