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   

Is there a linear relationship between R&D intensity and growth? Empirical evidence of non-high-tech vs. high-tech SMEs     

Paulo Maçãs Nunes  Zélia Serrasqueiro  João Leitão 《Research Policy》2012,41(1):36-53

To investigate whether there is a similar relationship between R&D intensity and growth in high-tech and non-high-tech small and medium-sized enterprises (SMEs), we examine two samples of SMEs in manufacturing industries, applying the two-step estimation method. Our findings are that R&D intensity restricts the growth of high-tech SMEs at lower levels of R&D intensity and stimulates their growth at higher levels. However, R&D intensity restricts the growth of non-high-tech SMEs regardless of the level of R&D. The relationships obtained between other determinants considered in the literature and the growth of high-tech and non-high-tech SMEs allow us to conclude that (i) smaller, younger, non-high-tech SMEs grow more quickly than larger, older, non-high-tech SMEs, which does not occur in the case of high-tech SMEs; and (ii) financing restrictions are especially important in financing the growth of high-tech SMEs, compared with non-high-tech SMEs.  相似文献   

Self-efficacy beliefs and the relation between career planning and perception of barriers     

Paulo Cardoso  João Manuel Moreira 《International Journal for Educational and Vocational Guidance》2009,9(3):177-188

This study tested the hypothesis that self-efficacy in career roles moderates the relation between perception of career barriers and career planning, in a study with Portuguese students, 488 in Grade 9 and 517 in Grade 12. The results supported the hypothesis only among Grade 9 girls, showing that perception of career barriers leads to less career planning among girls low in self-efficacy. The findings suggest that variables such as gender and psychological maturity need to be considered in understanding career planning.  相似文献   

EDLE: an integrated tool to foster entrepreneurial skills development in engineering education     

Elzo Alves Aranha  Paulo Henrique dos Santos  Neuza Abbud Prado Garcia 《Educational technology research and development : ETR & D》2018,66(6):1571-1599

Academic papers on entrepreneurship in engineers’ education have been growing in the last decades. However, studies on entrepreneurship in engineering have not sought to analyze how entrepreneurship education, in connection to active learning, design thinking, and Bloom’s Taxonomy, inserted in an integrated way, as a tool, might help the process of engineering students’ entrepreneurial skills development. Thus, this study has the goal to propose an integrated tool, linked to the principles of entrepreneurship education, active learning, design thinking, and Bloom’s Taxonomy, to foster engineering students’ entrepreneurial skills development. The tool, called Entrepreneurial Dynamic Learning, is operationalized and validated in a 2-year case study in a Brazilian public university. The study also produces practical implications, and five are highlighted: (1) at the level of governments and policy makers; (2) engineering scientific associations; (3) universities, coordinators, and professors of engineering undergraduate programs; (4) engineering education researchers; and (5) the Brazilian National Confederation of Industry.  相似文献   

Predicting volleyball serve-reception at group level     

Ana Paulo  Frank T.J.M. Zaal  Ludovic Seifert  Sofia Fonseca  Duarte Araújo 《Journal of sports sciences》2018,36(22):2621-2630

In a group-serve-reception task, how does serve-reception become effective? We addressed “who” receives/passes the ball, what task-related variables predict action mode selection and whether the action mode selected was associated with reception efficacy. In 182 serve-receptions we tracked the ball and the receivers’ heads with two video-cameras to generate 3D world-coordinates reconstructions. We defined receivers’ reception-areas based on Voronoi diagrams (VD). Our analyses of the data showed that this approach was accurate in describing “who” receives the serve in 95.05% of the times. To predict action mode selection, we used variables related to: serve kinematics, receiver’s movement and on-court positioning, the relation between receiver and his closest partner, and interactions between receiver-ball and receiver-target. Serve’s higher initial velocities together with higher maximum height, as well as smaller longitudinal distances between receiver and target increased the chances for the use of the overhand pass. Conversely, decreasing alignment of the receiver with the ball and the target increased the chances of using the underhand-lateral pass. Finally, the use of the underhand-lateral pass was associated with lower quality receptions. Behavioural variability’s relevance for serve-reception training is discussed.  相似文献   

Disparate faculty perspectives on system changes in higher education     

Joaquim S. Silva  Paulo Peixoto  Adelaide Freitas 《高等教育研究与发展》2018,37(3):593-606

Higher education (HE) systems around the world have experienced profound structural changes, particularly since the late 1960s to early 1970s, essentially driven by the need to expand access to tertiary education. This has resulted in a diversity of HE institutions (HEI) with different roles, missions and statuses, as well as academic staff with diverse perspectives and motivations. The present study is based on a survey undertaken in Portugal by a trade union, which aimed to collect faculty perspectives on a proposed HE reform sent out for public discussion by the government. Questions addressed the reorganization of the HEI network, the internal restructuring of HEI, the funding system and the binary divide of HEI (universities and polytechnics). The survey results showed a disparity of faculty perspectives about the proposed reform, closely related to the diversity of HEI. Respondents from lower academic categories and from smaller HEI were more opposed to reorganizing the HEI network. This reorganization was more widely accepted by university staff, who were also more in favour of a binary system than were polytechnic respondents. Although there was general agreement about the need to change the funding system, polytechnic respondents were strongly against a funding differentiation between universities and polytechnics. Despite an overall reformist trend, the enthusiasm for reforms declined substantially when the questions had a direct reference to the respondent’s region or institution. It is argued that HE expansion has driven the diversification of HEI, leading to a range of perspectives about the HE system and the way it should be changed. These conclusions may contribute to insights into other HE systems around the world where institutional diversification has been sought by public policies.  相似文献   

The benefits of multivariate singular spectrum analysis over the univariate version     

Paulo Canas Rodrigues  Rahim Mahmoudvand 《Journal of The Franklin Institute》2018,355(1):544-564

Singular Spectrum Analysis (SSA) is a relatively simple and powerful method in the area of time series analysis that is mainly based on matrix analysis. In this paper, we present a methodological comparison between the univariate and multivariate versions of SSA. Additionally, we explore the advantages of multivariate SSA in terms of theoretical results and with application to a real data set on currency exchange rates.  相似文献   

Education: domestication or liberation?     

Paulo Freire 《Prospects》1972,2(2):173-181

  相似文献   

Enhancing the Popularity and the Relevance of Science Teaching in Portuguese Science Classes     

Cecília Galv?o  Pedro Reis  Sofia Freire  Paulo Almeida 《Research in Science Education》2011,41(5):651-666

PARSEL Project emerged from the urgent need to overcome the problem of lack of scientific literacy in the population, which should be a priority in a society where science occupies a central place. Indeed, nowadays for any citizen to participate in a responsible and informed way in society he has to be scientifically acknowledgeable. Nevertheless, not only are scientific levels low in the general population, but also there is an increasing number of students who avoid science and technology courses and related professions. Within this context, PARSEL aims at raising science and scientific courses’ popularity and relevancy as well as at enacting teachers’ professional development. In order to achieve these goals, the PARSEL group developed 54 pan-European modules, which were tested and evaluated by several teachers in several European countries and Israel. Teachers maintained a close relationship with the university, were highly encouraged to appropriate the modules and to adapt them to their local conditions and, also to discuss and share their experiences. In Portugal, modules were tested by a group of eight teachers, and their students. This paper presents data concerning teachers’ evaluation. Data was collected by means of interviews, observation and written documents and reveals that teachers positively evaluated PARSEL’s impact on their own professional development. Furthermore, they considered modules as well as the teaching-learning approach essential for making science learning relevant and popular for their students.  相似文献   

How and where is artificial intelligence in the public sector going? A literature review and research agenda     

Weslei Gomes de Sousa  Elis Regina Pereira de Melo  Paulo Henrique De Souza Bermejo  Rafael Araújo Sousa Farias  Adalmir Oliveira Gomes 《Government Information Quarterly》2019,36(4):101392

To obtain benefits in the provision of public services, managers of public organizations have considerably increased the adoption of artificial intelligence (AI) systems. However, research on AI is still scarce, and the advance of this technology in the public sector, as well as the applications and results of this strategy, need to be systematized. With this goal in mind, this paper examines research related to AI as applied to the public sector. A review of the literature covering articles available in five research databases was completed using the PRISMA protocol for literature reviews. The search process yielded 59 articles within the scope of the study out of a total of 1682 studies. Results show a growing trend of interest in AI in the public sector, with India and the US as the most active countries. General public service, economic affairs, and environmental protection are the functions of government with the most studies related to AI. The Artificial Neural Networks (ANN) technique is the most recurrent in the investigated studies and was pointed out as a technique that provides positive results in several areas of its application. A research framework for AI solutions for the public sector is presented, where it is demonstrated that policies and ethical implications of the use of AI permeate all layers of application of this technology and the solutions can generate value for functions of government. However, for this, a prior debate with society about the use of AI in the public sector is recommended.  相似文献