人人都怕克里斯     

Diego 《当代体育》2006,(4):32-34

人人都恨克里斯，人人都爱克里斯，这都是我们想要的名字，可惜早被别人捷足先登了。《人人都恨克里斯》是正在热播的美剧，讲述的是80年代初纽约布鲁克林区一个黑人家庭，三个未成年子女中老大的喜剧故事；  相似文献   

Inerter-like devices used for vibration isolation: A historical perspective     

Willian M. Kuhnert  Paulo J. Paupitz Gonçalves  Diego F. Ledezma-Ramirez  Michael J. Brennan 《Journal of The Franklin Institute》2021,358(1):1070-1086

Recently, a lot of attention has been given to a mechanical device known as the inerter. It is a mechanical component that can be compared to a capacitor with two ungrounded terminals in the mechanical-electrical systems analogy. In this paper, it is shown that although the concept of an inerter as a separate mechanical element is relatively new, there are several well-established vibration isolation systems that exhibit similar behavior to a simple lumped parameter system containing an inerter. Through a review of the literature, a link is established between the old and new ideas. Furthermore, a comparison between the systems is carried out using the quantities of mechanical impedance and displacement transmissibility. The advantages and disadvantages of using the inerter in vibration isolation are discussed, and a simple way of improving the high-frequency performance without severely degrading the low-frequency performance is described.  相似文献   

Competences in demand within the Spanish agricultural engineering sector     

Alicia Perdigones  Diego Luis Valera  Guillermo Pedro Moreda  Jose Luis García 《European Journal of Engineering Education》2014,39(5):527-538

The Rural Engineering Department (Technical University of Madrid) ran three competence surveys during the 2006–2007 and 2007–2008 academic years and evaluated: (1) the competences gained by agricultural engineer's degree and agricultural technical engineer's degree students (360 respondents); (2) the competences demanded by agricultural employers (50 farming sector employers); (3) competences required by farming sector professionals and former students (70 professionals). The surveys show significant differences between what competences agricultural employers require of graduates and the competences they acquire during their agricultural engineering degree courses. Recruiters are looking for generic competences such as the ability to coordinate groups and place less importance on knowledge of engineering, biology, applied economics and legislation. Of the computer-related competences, those most in demand by sector professionals were related to the use of Microsoft Office/Excel (used by 79% of professionals). Surveys were used to redesign some subjects of the degrees.  相似文献   

Public narratives under intensified market conditions: Chile as a critical case     

Diego Santori 《Discourse: Studies in the Cultural Politics of Education》2018,39(1):53-68

This paper aims to extend existing theorisations around the notion of public narratives by analysing their regulatory effects under intensified market conditions. My analysis suggests that public narratives constitute a liminal space, one that it is not exclusively real or imaginary, factual or normative, but that simultaneously affects and is affected by vernacular practices and wider discursive structures. However, this paper argues that, under extreme conditions, these public narratives become a rigidifying space with homogenising/normalising effects. To do this I look at a set of ‘obligatory scenes’ captured in tales of success and struggle of teachers, parents and students in popular newspapers and fringe media in Chile. These accounts share a common ground: national assessment as a framework of intelligibility for the practices of parents, teachers and students. The central claim of this paper is that under intensified market conditions the scenes captured in these publicly available stories become ‘obligatory’ storylines, and their protagonists idealised policy subjects.  相似文献   

Estimating fat-free mass in elite youth male soccer players: cross-validation of different field methods and development of prediction equation     

Diego Munguía-Izquierdo  Luis Suárez-Arrones  Valter Di Salvo  Victor Paredes-Hernández  Ignacio Ara  Alberto Mendez-Villanueva 《Journal of sports sciences》2019,37(11):1197-1204

This study determined the most effective field method for quantifying fat-free mass (FFM) in elite youth male soccer players compared to dual X-ray absorptiometry (DXA) values and to develop prediction equations for FFM based on anthropometric variables. Forty-one male elite-standard youth soccer players, ages 16.2–18.0 years, undertook FFM assessments including bioelectrical impedance analysis, and different skinfold-based prediction equations. DXA provided a criterion measure of FFM. Correlation coefficients, bias, limits of agreement, and differences were used as validity measures, and regression analyses to develop soccer-specific prediction equations. Slaughter et al (1988), Durnin and Wormersley (1974), and Sarria et al (1998) equations showed the lowest biases, and no significant, standardized, and substantial differences against DXA. The new youth soccer-specific anthropometric equation explained 91% of the DXA-derived FFM variance using three circumferences, eight skinfolds, and one bone breadth. All field methods compared in this study may not be adequate for estimating FFM in elite youth male soccer players, except the equations of Slaughter et al (1988), Durnin and Wormersley (1974), and Sarria et al (1998). We recommend the use of the new soccer-specific equation proposed in this study as a valid alternative to DXA to quantify FFM among elite youth male players.  相似文献   

Prediction of peak V˙O2 in Children and Adolescents With HIV From an Incremental Cycle Ergometer Test     

Luiz Rodrigo Augustemak de Lima  Diego Augusto Santos Silva  Paulo Cesar do Nascimento Salvador  Carlos Alencar Souza Alves Junior  Priscila Custódio Martins  João Antônio Chula de Castro 《Research quarterly for exercise and sport》2019,90(2):163-171

  相似文献   

Cross-curricular skills development in final-year dissertation by active and collaborative methodologies     

Iñaki Etaio  Itziar Churruca  Diego Rada  Jonatan Miranda  Amaia Saracibar  Fernando Sarrionandia 《Interactive Learning Environments》2018,26(2):175-188

European Frame for Higher Education has led universities to adapt their teaching schemes. Degrees must train students in competences including specific and cross-curricular skills. Nevertheless, there are important limitations to follow skill improvement through the consecutive academic years. Final-year dissertation (FYD) offers the opportunity to assess these aspects so linked to the professional requirements. The experience reported here offers an alternative methodology for the FYD in order to reinforce cross-curricular skills and substitute the classic final evaluation schemes. A new protocol for the FYD was defined and tested in the Degree in Human Nutrition and Dietetics, with the participation of students and lecturers from different disciplines. The new methodology included collaborative activities that required students active implication and participation. New cross-curricular skills not considered before were included and evaluated in a continuous way: analysis and critical attitude, as well as team working. Obtained data revealed an improvement over cross-curricular skills. Student–student cooperation resulted in significant contributions to enhance FYD quality. The new methodology was satisfactorily valued by students. The main keys for the successful implementation of this protocol were the followings: encouragement of teachers and students, coordination, information and communication technologies, and clear guidelines.  相似文献   

Oxidative stress in elite athletes training at moderate altitude and at sea level     

Josefa León-López  Carmen Calderón-Soto  Matías Pérez-Sánchez  Belén Feriche  Xavier Iglesias  Diego Chaverri 《European Journal of Sport Science》2018,18(6):832-841

Using a controlled parallel group longitudinal trial design, we investigated the effects of different training interventions on the prooxidant/antioxidant status of elite athletes: living and training at moderate altitude for 3 (Hi-Hi3) and 4 weeks (Hi-Hi), and for 4 weeks too, living high and training high and low (Hi-HiLo) and living and training at sea level (Lo-Lo). From 61 swimmers, 54 completed the study. Nitrites, carbonyls, and lipid peroxidation (LPO) levels were assessed in plasma. Enzymatic antioxidants glutathione peroxidase (GPx) and glutathione reductase (GRd), and non-enzymatic antioxidants total glutathione (GST), reduced glutathione (GSH) and oxidized glutathione (GSSG) were analysed in the erythrocyte fraction. At the end of the intervention, nitrites levels were similar in all altitude groups but higher than in the Lo-Lo controls (P?=?.02). Hi-HiLo had greater GPx activity than Hi-Hi and Hi-Hi3 during most of the intervention (P?≤?.001). GRd activity was higher in Lo-Lo than in Hi-Hi at the end of the training camp (P?≤?.001). All groups showed increased levels of LPO, except Lo-Lo, and carbonyls at the end of the study (P?≤?.001). Training at altitude for 3 or 4 weeks drives oxidative stress leading to cellular damage mainly by worsening the antioxidant capacities. The GSSG/GSH ratio appears to be related to perceived exertion and fatigue. The stronger antioxidant defence showed by the Hi-HiLo group suggests an inverse relationship between redox alterations and performance. Further studies are required to investigate the role of oxidative stress in acclimatization, performance, and health.  相似文献   

Reliability assessment and correlation analysis of 3 protocols to measure trunk muscle strength and endurance     

Casto Juan-Recio  Diego López-Plaza  David Barbado Murillo  M. Pilar García-Vaquero 《Journal of sports sciences》2018,36(4):357-364

Different methods have been developed to quantify trunk muscle strength and endurance. However, some important protocol characteristics are still unclear, hindering the selection of the most suitable tests in each specific situation. The aim of this study was to examine the reliability and the relationship between 3 representative tests of the most common type of protocols used to assess trunk muscle strength and endurance. Twenty-seven healthy men performed each test twice spaced 1 month apart.Trunk strength and endurance were evaluated with an isokinetic dynamometer and 2 field tests including Biering-Sørensen test and Flexion–rotation trunk test.

All tests showed a good relative consistency (intraclass correlation coefficient [ICC]> 0.75), except for the isokinetic endurance variables which had low–moderate reliability (0.37 < ICC > 0.65). Absolute reliability seemed slightly better in the isokinetic protocol than in the field tests, which showed about 12% of test–retest score increase. No significant correlations were found between test scores.

After a familiarisation period for the field tests, the 3 protocols can be used to obtain reliable measures of trunk muscle strength and endurance. Based on the correlation analysis, these measures are not related, which highlights the importance of selecting the most suitable trunk test for each situation.  相似文献   

Antecedents of continued use intention of e-hailing apps from the passengers' perspective     

Luiz Antonio Joia  Diego Altieri 《The Journal of High Technology Management Research》2018,29(2):204-215

E-Hailing Apps (EHA) – mobile device software to order any form of transportation pick up – have become very popular in society due to the swift proliferation of smartphones worldwide. Thus, the scope of this article is to ascertain the antecedents of continued use intention of EHA from the passengers' standpoint. To achieve this, a meta-model was developed via a theoretical background based on theories of information system adoption, diffusion of innovation, trust in virtual environments and user satisfaction, as well as research hypotheses. By applying structural equation modelling in data collected via a web survey, the theoretical meta-model and research hypotheses were tested. It was established that perceived utility, compatibility, relative advantage and trust are antecedents of user satisfaction with EHA, this factor being an antecedent of the continued use intention of same. Lastly, it was found that subjective norms have a direct and statistically significant impact on the continued use intention of EHA.  相似文献