Squat Jump Performance During Growth in Both Sexes     

Eric Doré  Mario Bedu  Emmanuel Van Praagh 《Research quarterly for exercise and sport》2013,84(4):517-524

The purpose of this cross-sectional study was to investigate leg muscle power and compare two activities (jumping and cycling) in 383 girls and 407 boys ages 9–19 years. Results in anthropometric characteristics and jumping performance were comparable until midadolescence, and sex differences were observed. Lean leg volume (LLV) was the reason for most of the variance (76% in girls and 88% in boys) in jumping performance. However, the LLV exponent was higher than expected in boys but not girls. Therefore, unidentified qualitative changes of muscle function during growth in boys must be considered. The squat jump index (SJI) was highly correlated to cycling peak power (CPP; N = 790, r = .94, p < .001). Although prediction error of CPP from SJI was less than 5% when considering each sex-and-age group, individual errors mounted to 40%. Due to its practicability, SJI is recommended in large-scale developmental prospective studies. However, cycling and jumping protocols are not interchangeable when measuring peak power values.  相似文献   

Cold-water immersion alters muscle recruitment and balance of basketball players during vertical jump landing     

Christiane de Souza Guerino Macedo  Rafael Chagas Vicente  Mauricio Donini Cesário 《Journal of sports sciences》2016,34(4):348-357

The purpose of this study was to evaluate the effects of cold-water immersion on the electromyographic (EMG) response of the lower limb and balance during unipodal jump landing. The evaluation comprised 40 individuals (20 basketball players and 20 non-athletes). The EMG response in the lateral gastrocnemius, tibialis anterior, fibular longus, rectus femoris, hamstring and gluteus medius; amplitude and mean speed of the centre of pressure, flight time and ground reaction force (GRF) were analysed. All volunteers remained for 20 min with their ankle immersed in cold-water, and were re-evaluated immediately post and after 10, 20 and 30 min of reheating. The Shapiro–Wilk test, Friedman test and Dunn’s post test (P < 0.05) were used. The EMG response values decreased for the lateral gastrocnemius, tibialis anterior, fibular longus and rectus femoris of both athletes and non-athletes (P < 0.05). The comparison between the groups showed that the EMG response was lower for the athletes. Lower jump flight time and GRF, greater amplitude and mean speed of centre of pressure were predominant in the athletes. Cold-water immersion decreased the EMG activity of the lower limb, flight time and GRF and increased the amplitude and mean speed of centre of pressure.  相似文献   

Content and language integrated learning in OpenSimulator project. Results of a pilot implementation in Greece     

Emmanuel Fokides  Constantina Zampouli 《Education and Information Technologies》2017,22(4):1479-1496

The study presents the results of a pilot implementation of the Content and Language Integrated Learning in OpenSimulator Project-CLILiOP. Content and Language Integrated Learning together with constructivism provided the theoretical basis of the project. A multi-user virtual environment was developed using Opensimulator, which entailed a tour of the students’ avatars on a virtual island where they viewed and exchanged information in the English language regarding geographical terms and concepts. The project’s duration was ten weeks. A total of 105 students participated, divided into three groups: one used the application, the second was taught the same cognitive material using a conventional teaching method, but still under the scope of CLIL, while the third was conventionally taught. Results indicate that the learning outcomes of CLILiOP were better compared to the other two teaching methods, but also underline the need to further investigate the uses of 3D multi-user virtual environments in second language learning.  相似文献   

Mediating effect of behavioural intention on podcast acceptance     

Ifedayo  Adu Emmanuel  Ziden  Azidah Abu  Ismail  Aziah Binti 《Education and Information Technologies》2021,26(3):2767-2794

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#Stayathome #Fiqueemcasa: Opportunities for new governances of public education in Brazil     

Macedo  Elizabeth 《Prospects》2021,51(1-3):393-405

PROSPECTS - It is not possible to predict how we might re-exist/resist while most of our bodies fail to be hospitable to the virus. For now, what seems possible, and potent, is to make strange the...  相似文献   

Addressing gender violence among children in the early years of schooling: insights from teachers in a South African primary school     

Emmanuel Mayeza  Deevia Bhana 《International Studies in Sociology of Education》2017,26(4):408-425

This paper explores how teachers in a poor township primary school in South Africa construct meaning regarding gender violence among children, and how they talk about addressing that violence. The paper argues that major influences on the endemic violence include complex societal structures that are inscribed with cultures of violent masculinities, extreme socio-economic conditions and gender inequality. It shows how primary school teachers recognise violent masculinities and gender power imbalances but simultaneously uphold the notion of children’s innocence as a rationale for refuting the primary school as a site of violence. The paper explores contradictions embedded in some of the solutions which the teachers suggest as a way of addressing violence. For example, while they highlight the importance of teaching peace, respect and equality, they also advocate the use of corporal punishment as an effective means of dealing with violent conduct among school children.  相似文献   

Business services as actors of knowledge transformation: the role of KIBS in regional and national innovation systems   总被引：16，自引：0，他引：16  

Emmanuel Muller  Andrea Zenker 《Research Policy》2001,30(9)

Over the last years, there has been a significant increase in the attention paid to the activities of knowledge-intensive business services (KIBS). KIBS produce and diffuse knowledge, which is crucial for innovation processes. The paper gives an overview of the role and function of KIBS in innovation systems and their knowledge production, transformation and diffusion activities. Focusing on innovation interactions between manufacturing small- and medium-sized enterprises (SMEs) and KIBS, the empirical analyses grasps KIBS position in five regional contexts. The analysis leads to the conclusion that innovation activities link SMEs and KIBS through the process of knowledge generation and diffusion.  相似文献   

Biometric technology for voter identification: The experience in Ghana     

John Effah  Emmanuel Debrah 《The Information Society》2018,34(2):104-113

Our study examines how and why Ghana's first attempt to use biometric technology for voter identification and verification in its 2012 general elections failed. We employ activity theory as the analytical lens and interpretive case study as the methodology. Our findings show that the effectiveness of biometric technology to provide reliable identification does not depend solely on its technical qualities but also on real-time connectivity between registration centres and an electronic national register. Furthermore, the electoral officials need to be trained intensively to operate the machines and given guidance on how to handle situations when breakdowns occur. While biometric technology does introduce powerful capabilities, it is just one piece of a complex human activity system.  相似文献   

When intuitive conceptions overshadow pedagogical content knowledge: Teachers’ conceptions of students’ arithmetic word problem solving strategies     

Katarina Gvozdic  Emmanuel Sander 《Educational Studies in Mathematics》2018,98(2):157-175

Intuitive conceptions in mathematics guide the interpretation of mathematical concepts. We investigated if they bias teachers’ conceptions of student arithmetic word problem solving strategies, which should be part of their pedagogical content knowledge (PCK). In individual interviews, teachers and non-teaching adults were asked to describe students’ strategies in situational contexts within or outside the scope of the intuitive conception. The results revealed that teachers relied on their PCK and identified student strategies; however, in the presence of the intuitive conception, their PCK was overshadowed and they ceased to differ significantly from non-teachers. This brings the attention to certain biases that can have a strong impact on teachers’ efficient use of PCK.  相似文献   

Estimation of Upper Limit of Normal for Serum Alanine Transaminase in Healthy South Indian Population     

Pazhanivel Mohan  Varun Sundar  Emmanuel Bhaskar  Syluvai Anthony 《Indian journal of clinical biochemistry : IJCB》2017,32(3):337-342

Alanine aminotransferase (ALT) is the most common and cost effective screening test for asymptomatic liver disease. There is paucity of data on normal ALT among healthy individuals in India. An observational cross sectional study was conducted from January to July 2013 to estimate the upper limit of normal for ALT in healthy south Indian population. Adults undergoing voluntary or pre-employment health screening were included. Those with current and past alcoholism or smoking, acute illness or hospitalization during preceding 12 months, non-steroidal anti-inflammatory or over the counter medication use within a month, current or past intake of herbal medications, any chronic medical illness, abnormal body mass index (BMI), fatty liver in ultrasound, abnormality in haemoglobin, platelet count, blood sugar, creatinine, lipid profile and thyroid function test and positive serology (Hepatitis B, C or HIV) were excluded. A total of 2600 subjects were screened. 344 were included for analysis. Mean age was 35 years in men and 34.83 years in women, with a mean BMI of 22.2 kg/m² in men and 21.8 kg/m² in women. The mean ALT in men and women were 21.87 ± 2.9 (97.5th percentile 28 U/L) and 19.35 ± 3.3 (97.5th percentile 24 U/L) respectively. In conclusion, mean and upper limit of ALT (97.5th percentile) in south Indian men was 21.87 and 28 IU/L and women were 19.35 and 24 IU/L respectively. There is a need to re-consider ALT levels in our population for better detection of individuals at risk for liver disease.  相似文献