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1.
Ayako Higashihara Yasuharu Nagano Kazumasa Takahashi Toru Fukubayashi 《Journal of sports sciences》2015,33(13):1366-1375
This study aimed to investigate the effects of forward trunk lean on hamstring muscle kinematics during sprinting. Eight male sprinters performed maximal-effort sprints in two trunk positions: forward lean and upright. A three-dimensional musculoskeletal model was used to compute the musculotendon lengths and velocity of the biceps femoris long head, semitendinosus, and semimembranosus muscles during the sprinting gait cycle. The musculotendon lengths of all the three hamstring muscles at foot strike and toe-off were significantly greater during the forward trunk lean sprint than during the upright trunk sprint. In addition, a positive peak musculotendon lengthening velocity was observed in the biceps femoris long head and semimembranosus muscles during the late stance phase, and musculotendon lengths at that instant were significantly greater during the forward trunk lean sprint than during the upright trunk sprint. The present study provides significant evidence that a potential for hamstring muscle strain injury involving forward trunk lean sprinting would exist during the stance phase. The results also indicate that the biceps femoris long head and semimembranosus muscles are stretched during forward trunk lean sprinting while contracting eccentrically in the late stance phase; thus, the elongation load on these muscles could be increased. 相似文献
2.
Jerome Idiegbeyan-Ose Ayotunde Owolabi Chidi Segun-Adeniran Ayooluwa Aregbesola Sola Emmanuel Owolabi Toluwani Eyiolorunshe 《Public Library Quarterly》2019,38(1):103-115
One of the bedrock of Sustainable Development Goals (SDGs) is eradication of poverty and hunger. In an attempt to actualize this goal, the role of public libraries in information provision to agricultural extension agents in Nigeria becomes paramount. This paper discusses provision of information to agricultural extension agents in a developing country. It starts with the concept of extension agents and the essence of information provision to them. It further discusses types, sources and challenges of public libraries in information provision to agricultural extension workers in a developing country. Some of the challenges are as follows: poor funding of public libraries, demotivated staff, and so on. Based on these discussions, the paper recommended adequate training and retraining of staff, adequate funding of public libraries by the federal, state and local government, the revitalization of the abandoned mobile library services among others. The paper therefore concludes that information provision to agricultural extension agents by public library is very crucial for national development. The current state of poverty, hunger and lack in Nigeria and some other African countries could be reduced to a great extent if current, relevant and up-to-date information are provided by libraries to the concerned agencies. 相似文献
3.
We compared the reading development of 77 deaf and hard-of-hearing (DHH) Japanese children, aged 5–7 (40 females), with 139 of their hearing peers (74 females) in 2018. We assessed each group's phonological awareness (PA), grammar, vocabulary, and reading of hiragana (Japanese orthography children learn first). DHH children showed significant delays in grammar and vocabulary but only a slight delay in PA. Younger DHH children scored better than their hearing peers in reading. Although PA predicted reading for hearing children, reading predicted PA for DHH children. PA partially explained grammar skills for both groups. The results suggest educational intervention for reading acquisition should be based on not only general linguistic features but also each language's unique characteristics. 相似文献
4.
Developing an audiovisual notebook as a self‐learning tool in histology: Perceptions of teachers and students 
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下载免费PDF全文 Antonio Campos‐Sánchez Juan‐Antonio López‐Núñez Giuseppe Scionti Ingrid Garzón Miguel González‐Andrades Miguel Alaminos Tomás Sola 《Anatomical sciences education》2014,7(3):209-218
Videos can be used as didactic tools for self‐learning under several circumstances, including those cases in which students are responsible for the development of this resource as an audiovisual notebook. We compared students' and teachers' perceptions regarding the main features that an audiovisual notebook should include. Four questionnaires with items about information, images, text and music, and filmmaking were used to investigate students' (n = 115) and teachers' perceptions (n = 28) regarding the development of a video focused on a histological technique. The results show that both students and teachers significantly prioritize informative components, images and filmmaking more than text and music. The scores were significantly higher for teachers than for students for all four components analyzed. The highest scores were given to items related to practical and medically oriented elements, and the lowest values were given to theoretical and complementary elements. For most items, there were no differences between genders. A strong positive correlation was found between the scores given to each item by teachers and students. These results show that both students' and teachers' perceptions tend to coincide for most items, and suggest that audiovisual notebooks developed by students would emphasize the same items as those perceived by teachers to be the most relevant. Further, these findings suggest that the use of video as an audiovisual learning notebook would not only preserve the curricular objectives but would also offer the advantages of self‐learning processes. Anat Sci Educ 7: 209–218. © 2013 American Association of Anatomists. 相似文献
5.
In two experiments, immediate feedback defined as feedback following the completion of a 40-item multiple-choice test and delayed feedback (received 48 hr later) were examined in a simulated classroom situation with college students. As defined, delayed feedback was not superior to immediate feedback, as would be predicted by the delayed retention effect. Also, feedback in the form of correct answer only was superior to correct answer plus distractors lending partial support to the frequency theory of recognition memory. In addition to not finding the delayed retention effect, an analysis of errors in experiment two did not support the interference—perseveration hypothesis as an explanation for the type of error committed following immediate feedback. 相似文献
6.
Chie Takahashi 《Compare》2008,38(1):5-22
This paper examines the quality and development of relations between organisations and the ways in which these are informed by incidental learning experiences in two projects. The paper conceptualizes instances of inter‐organisational learning (IOL) applying theories such as principal‐agent, prisoners' dilemma and women's place in community development. The main results are (a) that IOL can be used to maintain and modify relations of control and dominance in partnership hierarchies; (b) that IOL serves as a spin‐off of horizontal relationships and can be increased or reduced in the competition between partners for resources and identity; and (c) that IOL at the community level, when delivering outsiders' intervention, can be promoted by involving local authorities and operating within the existing household hierarchy. The paper shows that the influential role of individuals, beyond organisational boundaries, becomes critical through social networks and the establishment of trust‐based relations and resistance to learning as consequences of personal conflict. However, structural constraints in the aid system, such as asymmetric access to resources, expertise, knowledge, status and networks, ultimately determine the quality of funding management schemes and the emergence of an environment that stimulates mutual individual learning, which in turn may lead to organisational learning and inter‐organisational learning. 相似文献
7.
Kazumi Masuda Nobuo Kikuhara Hideyuki Takahashi Kunio Yamanaka 《Journal of sports sciences》2013,31(10):851-858
Abstract The aim of the present study was to examine the relationships between muscle cross-sectional area (CSA) and muscular strength in terms of knee extension and flexion, hip extension and flexion, and hip abduction and adduction among well-trained soccer players. Fourteen university soccer players participated in the study, who had previously been divided into two groups based on ability (Group A: above-average ability; Group B: average ability). Maximal isokinetic and concentric muscular strength was measured in knee extension/flexion, hip extension/flexion and hip abduction/adduction using an isokinetic dynamometer at 1.57 and 4.19 rad·s?1 (3.14 rad·s?1) in both the dominant and non-dominant leg. The CSAs of the thigh, gluteus muscles and iliopsoas muscles were calculated based on magnetic resonance imaging. There was no significant difference between the two groups in muscle CSA and isokinetic strength. Although there were some statistically significant differences between the dominant and non-dominant leg in terms of CSA and strength (P<0.05–0.01), these were small and negligible. Apart from a non-significant relationship between the CSAs of the adductor muscles and hip adductor strength (r<0.26, n.s.), the CSA of the other muscle groups correlated with maximal isokinetic strength (r=0.38–0.64, P<0.05). These results suggest that no difference in muscle characteristics (in terms of muscle CSA and strength) was apparent among well-trained soccer players, even between the dominant and non-dominant leg. There is also a case that the anatomical function of a single (or group of) muscle(s) may not be reflected by the strength—CSA relationship depending on the movements (such as hip adduction-adductor muscle CSA). Thus, further studies are required to develop methods to assess neuromuscular function in relation to muscle morphology among soccer players. 相似文献
8.
Takashi Umeda Kazuhiro Suzukawa Ippei Takahashi Yousuke Yamamoto Masaru Tanabe Arata Kojima 《Journal of sports sciences》2013,31(9):897-904
Abstract To clarify the physical and mental fatigue caused by intense exercise and the relationship between the two types of fatigue, we examined changes in anthropometric and biochemical variables, neutrophil function, and the Profile of Mood States (POMS) questionnaire in 13 female university judoists attending a one-week training camp. Blood glucose, total cholesterol, haemoglobin, leukocyte count, IgG, and phagocytic activity all decreased after the training camp compared with baseline (P ≤ 0.046). Aspartate aminotransferase, lactate dehydrogenase, creatine kinase, and neutrophil oxidative burst activity increased after the training camp (P ≤ 0.007). Of the POMS scores, that for Fatigue increased after the training camp (P = 0.041) and that for Vigour decreased (P = 0.042). The changes in several POMS scores correlated with the changes in blood biochemical variables. In particular, the change in Total mood disturbance was negatively associated with changes in myogenic enzymes (P ≤ 0.032). Our results suggest that intense exercise during training camps for female judoists leads to the appearance and accumulation of mental and physical fatigue, which are related to each other. 相似文献
9.
Ithiel de Sola Pool 《The Information Society》2013,29(3-4):429-445
Abstract The technology of electronic information processing favors the eventual existence of large numbers of information publishers, rather than the creation of large central data banks. Publicity and billing are functions that may be assumed by large organizations, but database creation is likely to be highly pluralistic, and access to the data, wherever there are systems of universal electronic access to dispersed databases, raises problems with regard to copyright and to standards for interconnection. 相似文献
10.
Ithiel de Sola Pool Philip Stone Alexander Szalai George Melly T.C. Worsley D.G. Bridson 《Communication Booknotes Quarterly》2013,44(11):3-5
Church, Communication, Development (Committee on Society, Development, and Peace; Publications Department; Ecumenical Centre, 150 Route de Ferney, 1211 Geneva 20, Switzerland, $3.50) Ithiel de Sola Pool, Philip Stone and Alexander Szalai's Communications, Computers and Automation for Development (UNITAR Research Reports No. 6, UNITAR, 801 United Nations Plaza, New York 10017, $2.00) George Melly's Revolt into Style: the Pop Arts in Britain (Penguin [hardback], $8.95) T.C. Worsley's Television: The Ephemeral Art (London: Alan Ross, $9.00) D.G. Bridson's Prospero and Ariel: The Rise and Fall of Radio—A Personal Recollection (London: Gollancz, $10.50) Raymond Durgnat's A Mirror for England: British Movies from Austerity to Affluence (Praeger, $11.95) Asa Briggs History of Broadcasting in the United Kingdom (Oxford University Press, 1961, 1965) 相似文献