Introduction to the Special Issue     

Robert A. Fox  Rodrigo Queiroz e Melo 《Journal of School Choice》2015,9(4):481-485

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Effects of caffeine chewing gum on race performance and physiology in male and female cyclists     

Carl Paton  Vitor Costa  Luiz Guglielmo 《Journal of sports sciences》2015,33(10):1076-1083

This investigation reports the effects of chewing caffeinated gum on race performance with trained cyclists. Twenty competitive cyclists completed two 30-km time trials that included a maximal effort 0.2-km sprint each 10-km. Caffeine (~3–4 mg · kg^?1) or placebo was administered double-blind via chewing gum at the 10-km point following completion of the first sprint. Measures of power output, oxygen uptake, heart rate, lactate and perceived exertion were taken at set intervals during the time trial. Results indicated no substantial differences in any measured variables between caffeine and placebo conditions during the first 20-km of the time trial. Caffeine gum did however lead to substantial enhancements (mean ± 90% confidence limits (CLs)) in mean power during the final 10-km (3.8% ± 2.3%), and sprint power at 30-km (4.0% ± 3.6%). The increases in performance over the final 10-km were associated with small increases in heart rate and blood lactate (effect size of 0.24 and 0.28, respectively). There were large inter-individual variations in the response to caffeine, and apparent gender related differences in sprint performance. Chewing caffeine gum improves mean and sprint performance power in the final 10-km of a 30-km time trial in male and female cyclists most likely through an increase in nervous system activation.  相似文献   

Towards a heuristic frame for transferring e-government technology     

Gabriel Marcuzzo do Canto Cavalheiro  Luiz Antonio Joia 《Government Information Quarterly》2014

This article addresses challenges in accomplishing technology transfer process involving the adaptation and implementation of e-government applications from a donor country to a recipient country. Here it is claimed that prior e-government research has overlooked existing technology transfer literature from the field of knowledge management. This work is aimed at addressing the underlying issues associated with the transfer of e-government technology, given different characteristics of donor and recipient organizations in terms of the socio-economic context and the dynamics of the technological infrastructure. Based on a review, interpretation, and synthesis of a broad range of both technology transfer, e-government and knowledge management literature, we extend the Information Technology Transfer Life-Cycle Model, as this well-known model was derived entirely based on empirical evidence. To this end, we propose a heuristic frame for e-government technology transfer. Finally, five propositions accrued from both the literature review and the proposed heuristic frame are set forth to be further tested, in order to better understand the process dynamics of e-government technology transfer between countries.  相似文献   

Towards cyberactivism 2.0? Understanding the use of social media and other information technologies for political activism and social movements     

Rodrigo Sandoval-Almazan  J. Ramon Gil-Garcia 《Government Information Quarterly》2014

Information technologies are increasingly important for political and social activism. In particular, web 2.0 tools and social media applications have recently played a significant role in influencing government decision making and shaping the relationships between governments, citizens, politicians, and other social actors. After the Arab Spring and the uprisings that have led to significant political changes in Egypt, Tunisia, and Iran, commentators argue that information technologies have the potential to strengthen social movements and ultimately transform society. However, this influence is not new. There were movements in the 90s, using the new technologies of e-mail and websites, which were able to gather significant social attention and generate political pressure. Based on three Mexican social and political movements that span close to 20 years, this article identifies key similarities and differences in the use of information technologies and proposes a framework to understand the evolution of cyberactivism. Initially, activists used information technologies to promote a movement's main ideas and gain global support. More recently, a single tool or application, such as Twitter, has been the technological basis for certain social and political movements. However, there is a trend towards a more integrated use of social media tools and applications, generating what could be called cyberactivism 2.0. In addition, there are some distinguishable stages in the development of social protests using information technologies; this evolutionary model seems to be useful to understand very different social and political movements using very different levels of technological sophistication.  相似文献   

Applying the technology acceptance model to a Spanish City Hall     

José Luis Moreno Cegarra  Juan Gabriel Cegarra Navarro  José Rodrigo Córdoba Pachón 《International Journal of Information Management》2014

This paper examines the relative importance and significance of the four technology enablers introduced by Davis (1989) in the technology acceptance model (TAM) (perceived ease of use, perceived usefulness, attitude towards using and behavioural intention) for use on four different levels of citizen engagement in e-government (null, publish, interact and transact). An extended technology acceptance model (TAM) is developed to test citizen engagement towards online e-government services from a sample of 307 citizens who used the benefits advisor tool within a Spanish City Hall. Although the proposed model follows TAM and explains the intention towards the actual use of e-government by postulating four direct determinants, “A, PU, PEOU and BI” have been considered as parallel processes, meaning that each can have separate influence in different levels of citizen engagement. To achieve this goal, a multinomial logistic regression is developed and tested to confirm the explanatory power of the four technology enablers on the four different levels of e-government. Our findings further suggest that in order to implement e-government, some of the enablers matter more than others to move from one level of citizen engagement to another. The main contribution of the paper is to question the use of existing models which seek to represent the relationship between technology enablers and the adoption of e-government services without considering their impacts on citizens’ engagement. The implications of the findings are discussed and useful insights are provided in relation to policy recommendations geared to create appropriate conditions to build citizens’ engagement intent of use of e-government services.  相似文献   

Embodied-based environment for kindergarten children: Revisiting constructionist ideas     

José Armando Valente  Ricardo Caceffo  Rodrigo Bonacin  Julio Cesar dos Reis  Diego Addan Gonçalves  Maria Cecília Calani Baranauskas 《British journal of educational technology : journal of the Council for Educational Technology》2021,52(3):986-1003

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Balancing Institutional Demands with Effective Practice: A Lesson in Curricular and Professional Development     

Rochelle Rodrigo  Cristina D. Ramírez 《Technical Communication Quarterly》2017,26(3):314-328

ABSTRACT

Online writing courses have developed in importance to meet student learning and institutional expectations; over time, a controversy about training online instructors and building sustainable programs has emerged. This article relates training demands within the University of Arizona’s Writing Program and development of an online professional & technical writing certificate. The article proposes training instructors with master courses and building a sustained program through a participatory design to create a professional and integrated environment.  相似文献   

Uneducating South Africa: The failure to address the 1910–1993 legacy     

Johannes W. Fedderke  Raphael de Kadt  John M. Luiz 《International Review of Education/Internationale Zeitschrift für Erziehungswissenschaft/Revue internationale l'éducation》2000,6(3):257-281

This paper analyses various data on the South African schooling system since 1910. The data collected for the study cover a wide range of education indicators, from pupil enrolments, pupil teacher ratios, real expenditure (aggregate and per capita), matriculation pass rates, to some indicators of the quality of matriculation passes. The authors provide an indication of both inputs into and outputs of the educational system. In broad terms, the data indicate that from an educational perspective South Africa followed a modernisation trajectory that, although it drew ever larger numbers of pupils into the schooling system, was partial, distorted and fundamentally dysfunctional. The educational process was strongly affected by racial factors. To the extent that education is an important determinant of long run growth performance of economies, this implies that South Africa's educational policies were inimical to its long run growth.  相似文献   

Latin American Universities: From an Original Revolution to an Uncertain Transition   总被引：1，自引：0，他引：1  

Rodrigo?Arocena  Judith?SutzEmail author 《Higher Education》2005,50(4):573-592

The aim of this paper is to discuss the prospects of Latin American public universities. Its main assertion is that universities could become important actors of development in Latin America, but prevailing trends point in another direction. The paper focuses on the interactions between, on the one hand, specific traditions and social contexts, and, on the other hand, global trends concerning the role of knowledge and academic changes. The specific traits of the evolution of Higher Education in Latin America are discussed, in order to describe the emergence of an original ‘idea of University’. Changes and continuities during the last decades of the 20th century are summarized. Similarities and differences between developed countries and Latin America concerning current trends in Higher Education are analyzed. Particular attention is given to the interactions between what is happening in Latin American universities and the new insertion of the continent in the global economy. A prospective analysis is attempted, focusing on the social commitment of universities.  相似文献   

Stiffness,intralimb coordination,and joint modulation during a continuous vertical jump test     

Juliano Dal Pupo  Jonathan Ache Dias  Rodrigo Ghedini Gheller  Daniele Detanico  Saray Giovana Dos Santos 《Sports biomechanics / International Society of Biomechanics in Sports》2013,12(3):259-271

This study analysed the modulation of jump performance, vertical stiffness as well as joint and intralimb coordination throughout a 30-s vertical jump test. Twenty male athletes performed the test on a force plate while undergoing kinematic analysis. Jump height, power output, ground contact time, vertical stiffness, maximum knee and hip flexion angles, and coordination by continuous relative phase (CRP) were analysed. Analysis of variance was used to compare variables within deciles, and t-tests were used to compare CRP data between the initial and final jumps. Results showed reduction in jump height, power output, and vertical stiffness, with an increase in contact time found during the test. Maximum knee and hip flexion angles declined, but hip angle decreased earlier (10–20% of the test) than knee angle (90–100%). No changes were observed in CRP for thigh–leg coupling when comparing initial and final jumps, but the trunk–thigh coupling was more in-phase near the end of the test. We conclude that fatigue causes reduction in jump performance, as well as changes in stiffness and joint angles. Furthermore, changes in intralimb coordination appear at the last 10% of the test, suggesting a neuromotor mechanism to counterbalance the loss of muscle strength.  相似文献