Do Corequisite Math Courses Improve Academic Outcomes in Technical Colleges?: Evidence from Chile     

Boatman  Angela  Claro  Susana  Fresard  Matias  Kramer  Jenna W. 《Research in higher education》2022,63(3):453-480

Research in Higher Education - For countries concerned about equity and access to higher education, providing support services for academically underprepared students is critical to increasing...  相似文献   

Dynamics of players’ relative positioning during baseline rallies in tennis     

João Carvalho  Duarte Araújo  Bruno Travassos  Pedro Esteves  Luís Pessanha  Fernando Pereira 《Journal of sports sciences》2013,31(14):1596-1605

Abstract

This study analysed how the relative positioning of players on court influenced patterns of interpersonal coordination in baseline rallies in tennis. We developed a model (PA index) that assigns a weight to the position of each player on court and determines a positional advantage, based on the relative proportionality between the lateral and longitudinal displacement values during rallies. To test the model, data from 27 randomly-selected baseline rallies from three ATP World Tour matches (professional tennis players' tournaments organized by Association of Tennis Professionals) on clay were analysed. Results revealed that the PA index of players on court described their interpersonal coordination dynamics during baseline rallies. It also identified the emergence of rally breaks in the interpersonal coordination patterns of competing dyads that led to a point being scored. Data suggest that positional advantage data may assist coaches in the design of training tasks to enhance players' court coverage and performance during competitive interactions, acting as a valuable tool for performance analysis in tennis.  相似文献   

Change-of-direction,speed and jump performance in soccer players: a comparison across different age-categories     

Irineu Loturco  Ian Jeffreys  César C. Cal Abad  Ronaldo Kobal  Vinicius Zanetti  Lucas A. Pereira 《Journal of sports sciences》2020,38(11-12):1279-1285

ABSTRACT

This study examined the age-specific development of vertical jump height, straight and change-of-direction (COD) speed, and COD deficit in one-hundred and eighty-two elite soccer players from different age-categories (U15, U17, U20, and Senior). All participants were players of two distinct clubs and were undertaking different training routines, as planned by their technical staff members. For this purpose, the soccer players performed: (1) squat and countermovement jumps; (2) a maximal 20-m linear sprint speed test, and (3) the Zigzag COD test. The magnitude-based inference approach and standardized differences were used to compare the age-groups. Sprint speed at longer distances (20-m) increased progressively across the age-ranges. In contrast, speed and acceleration performances at shorter distances (5-m) were better in U15 than in the other age-categories. The COD speed did not change throughout the younger categories but presented a meaningful decrease in the Senior category. Surprisingly, despite the progressive increase in volume and intensity of neuromuscular training from younger to older categories, the COD deficit presented a gradual increase across the age-groups. It is possible that simple modulation of the strength-power training program during the maturation process is not sufficient to produce faster adult players with enhanced ability to change direction. Therefore, coaches are strongly encouraged to implement specific COD training practices to tolerate braking at increasing running speeds and appropriate volume and intensity of soccer specific training throughout the players’ specialization process.  相似文献   

Is it worth establishing institutional repositories? The strategies for open access to Spanish peer‐reviewed articles     

Nerea RODRÍGUEZ‐ARMENTIA  Carlos B. AMAT 《Learned Publishing》2010,23(3):193-208

We examine open access to the Spanish scientific literature via investigation of a sample of peer‐reviewed articles in seven subject categories. Of the 28,259 papers published in 2000, 26.89% were freely accessible, with the share varying among disciplines. Articles in the social and behavioral sciences were the most widely available for free. This disciplinary divide applies also to the strategies used to offer open access to documents. In clinical medicine, life sciences, arts and humanities and social sciences open access was mainly based on the publishers' side, while subject‐based repositories were dominant in physical, chemical and earth sciences and deposit on homepages was the preferred strategy in engineering, computing and technology. Institutional and general repositories seem to play a minor role in providing free access to the Spanish peer‐reviewed literature. Papers published in commercial journals are less accessible than those that appear in non‐commercial journals, and we found overlaps in almost 20% of papers deposited. The fastest way to gain open access is to deposit in subject‐based repositories and the longest delays are related to deposits in homepages and especially to institutional repositories. Open access to Spanish peer‐reviewed articles is dominated by the passive mechanism of the “gold route” and the editorial strategy with self‐archiving practices in the minority and directed mainly towards subject‐based repositories and homepage posting of the papers. The results of this study could serve as a reference point for further study on the evolution of open access in Spain.  相似文献   

What level of education matters most for growth?: Evidence from Portugal     

João Pereira  Miguel St. Aubyn 《Economics of Education Review》2009

We decompose annual average years of schooling series for Portugal into different schooling levels series. By estimating a number of vector autoregressions, we provide measures of aggregate and disaggregate economic growth impacts of different education levels. Increasing education at all levels except tertiary have a positive and significant effect on growth. Investment in education does not significantly crowd out physical investment and average years of schooling semi-elasticities have comparable magnitude across primary and secondary levels.  相似文献   

Understanding productivity dynamics: A task taxonomy approach     

Tiago Fonseca  Francisco Lima  Sonia C. Pereira 《Research Policy》2018,47(1):289-304

As job markets have been polarizing, firms have been changing their labor inputs. By using matched employer–employee data for Portugal, we examine whether labor market polarization has occurred within or across firms and how labor input upgrades have contributed to overall productivity growth. We develop a firm taxonomy based on worker's occupational data. Firms can be focused on one task – Abstract, Manual or Routine – on a combination of tasks, or none. Results show that Abstract firms are the most productive and their share has increased over time. Manual firms, the least productive, have had a stable share throughout the period. Routine firms have seen their share decline over time. The dynamic decomposition of the estimated productivity reveals that productivity growth is propelled by increased market shares of the most productive incumbents and exiting of the least productive, especially for Abstract firms. Notwithstanding these productivity growth drivers, they fail to avert the productivity stagnation observed in Portugal between 2004 and 2009 due to the overall decline in productivity of incumbent firms, especially Routine. We discuss the policy implications of our results which are relevant to other European economies also lagging behind in terms of knowledge and innovation capabilities.  相似文献   

The introduction, methods, results, and discussion (IMRAD) structure: a fifty-year survey.   总被引：1，自引：0，他引：1  

Luciana B Sollaci  Mauricio G Pereira 《Journal of the Medical Library Association》2004,92(3):364-367

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Beyond ‘dusty archives’: The economic benefits of preserving recorded heritage     

Susana Mourato  David Pearce  Ece Ozdemiroglu  Alexandra Howarth 《Cultural Trends》2000,10(39):85-116

Libraries and archives are increasingly under pressure to justify the cost of preserving the recorded heritage. This paper addresses the real need to identify and measure the benefits of preservation of the recorded heritage in the UK.

Stated preference techniques are well established in the field of environmental economics, and they are also appropriate for the valuation of cultural heritage. The authors develop and test a methodology to estimate people's preferences for the preservation of the recorded heritage through two stated preference case (pilot) studies.

All library and archive materials supporting the written and documentary heritage of the chosen case studies have been considered. The benefits of preservation are identified as those associated with the use of the recorded heritage (for example, by schools, commercial organisations, academics and other interested parties), the option of using it in the future, and the value placed on its existence by the general public, even if they have no intention of using it.

The main advantage of estimating the benefits of preservation in monetary terms is that these can be compared with the costs of preservation to determine whether any given project or policy is worthwhile, or indeed to choose among competing projects for the allocation of funds.  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   

New ways of building,showcasing, and measuring scholarly reputation          下载免费PDF全文

David NICHOLAS  Eti HERMAN  Hamid JAMALI  Blanca RODRÍGUEZ‐BRAVO  Cherifa BOUKACEM‐ZEGHMOURI  Tom DOBROWOLSKI  Stephanie POUCHOT 《Learned Publishing》2015,28(3):169-183

The article reports on a study of the views and actions of nearly a hundred scholars – mostly academic researchers from four European countries and four disciplines – in regard to scholarly reputation in the Science 2.0 age. It specifically looks at the role that 'emerging reputational mechanisms and platforms are playing in building, maintaining, and showcasing scholarly reputation in the digital age. Popular examples of such platforms are ResearchGate and Academia.edu . Data were obtained through one‐to‐one interviews and focus groups, supported by desk research. The main findings were: (a) it is early days and uptake is light and patchy with platforms largely used for non‐reputational purposes, such as sharing documents; (b) most users were passive and did not fully engage with the social aspects of the platforms; (c) the reputational focus was very much on just one scholarly activity (research), on just two outputs of that activity (publications and conferences) and one measurement of that activity (citations), but there are the stirrings of change; (d) young researchers are set to profit most from the emerging platforms.  相似文献