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21.
Phonological awareness has been found to be strongly related to spelling. Findings on the relations between rapid‐naming and spelling are less consistent and have been suggested to be shared with speed of processing. This study set out to examine these relations in spelling and reading of Hebrew. Children attending the regular educational system were followed longitudinally (N = 70): phonological awareness, rapid‐naming and speed of processing were tested in kindergarten and in grade 1, and spelling and reading were tested in grade 2. Kindergarten and grade 1 rapid‐naming predicted spelling and word reading, and grade 1 phonological awareness predicted spelling, word reading and decoding. Speed of processing was an insignificant predictor. The findings extend the role of phonological awareness in spelling to an orthography with partial phonological representations and concurrently suggest weak relations. The results further suggest a link between rapid‐naming and orthographic knowledge, which may not be explained by shared variance with speed of processing. 相似文献
22.
Sezgin Korkmaz 《Journal of sports sciences》2016,34(11):1088-1093
The strength and technical competence of junior female lifters play a decisive role not only for their current but also adulthood performance. The objective of this study was to investigate the three-dimensional kinematics of the snatch technique in junior female weightlifters. Ten elite junior female weightlifters participated in the study. Two cameras operating at 50 fields per second were used to record the lifts. The heaviest successful lifts were selected for the kinematic analysis. The kinematical data were obtained using a motion analysis system. The duration of the first pull was significantly longer than that of the other phases (P < 0.05). Maximum extension angle and velocity of the lower limb joints were significantly greater in the second pull (P < 0.05). The greatest extension angle was found in the knee joint during the first pull, while the greatest extension angle was observed in the hip joint during the second pull (P < 0.05). Maximum extension velocity of the knee and hip joints was significantly greater than that of the ankle in both phases (P < 0.05). In addition, the vertical velocity of the barbell and the absolute and relative power outputs was significantly higher in the second pull than in the first pull (P < 0.05). In the snatch lifting of junior female weightlifters, the angular kinematics of lower limb joints, the linear kinematics and trajectory of the barbell and other energy characteristics are similar to and consistent with the values reported in literature for adult female weightlifters. 相似文献
23.
Sırakaya Mustafa Alsancak Sırakaya Didem Korkmaz Özgen 《Journal of Science Education and Technology》2020,29(4):561-572
Journal of Science Education and Technology - This study aimed to investigate the relationships among computational thinking (CT) skills, science, technology, engineering and mathematics (STEM)... 相似文献
24.
Pupils' concepts regarding various types of action-at-a-distance were studied. It was found that often these perceptions related to an underlying framework of presumptions: Earth is unique, a conducting medium is needed, support is needed. These misconceptions have their analogies in the history of science; pupils' difficulties reflect those encountered by earlier scientists. These analogies, which are characterized by using concrete realizations for abstract physical concepts, are relevant to the educational researcher, the science teacher and the pupil. 相似文献
25.
Ayhan Korkmaz Mika Venojärvi Niko Wasenius Sirpa Manderoos Keith C. Deruisseau Eva-Karin Gidlund 《European Journal of Sport Science》2019,19(2):258-266
Irisin is a myokine that is thought to be secreted in response to exercise that may help to prevent obesity and maintain normal glucose metabolism. In this study we investigated the associations between irisin and glucose homeostasis in middle-aged, overweight and obese men (n?= 144) with impaired glucose regulation, and the impact of exercise training on these relationships. The participants underwent 12 weeks of resistance or aerobic (Nordic walking) exercise training three times per week, 60 minutes per session. Venous blood (n?=?105) and skeletal muscle samples (n?=?45) were obtained at baseline and post-intervention. Compared to controls, Nordic walking, but not resistance training, increased irisin levels in plasma (9.6?±?4.2%, P?=?0.014; 8.7?± 4.9%, P?=?0.087; respectively) compared to controls. When considering all subjects, baseline irisin correlated positively with atherogenic index of plasma (r?=?0.244, P?=?0.013) and 2-hour insulin levels (r?=?0.214, P?=?0.028), and negatively with age (r?=??0.262, P?=?0.007), adiponectin (r?=??0.240, P?=?0.014) and McAuley index (r?=??0.259, P?=?0.008). Training-induced FNDC5 mRNA changes were negatively correlated with HbA1c (r?=??0.527, P?=?0.030) in the resistance training group and with chemerin in the Nordic walking group (r?=??0.615, P?=?0.033). In conclusion, 12-weeks of Nordic walking was more effective than resistance training in elevating plasma irisin, in middle-aged men with impaired glucose tolerance. Thus, the change in irisin in response to exercise training varied by the type of exercise but showed limited association with improvements in glucose homeostasis. 相似文献
26.
The current transformation of communication policies, as governments turn to the marketplace as the driver of network evolution, requires a redefinition of universal service. The debate so far has focused primarily on the elaboration of new funding mechanisms and the definition of which services should be covered. We argue that a more fundamental, third area demands attention: the articulation of a new rationale for universal service itself. Without articulating a clear justification for universal service, designing its scope and funding mechanisms is problematic at best. Past justifications rested on welfare (make telephony affordable to all) and network externalities (increase the network?s value by widening its reach). Increasingly, these need to be complemented by a new rationale based on the innovative potential of universal service. This article explores how universal service can fuel innovation-driven economic growth. 相似文献
27.
Leah M. Sandvoss William S. Harwood Ali Korkmaz John C. Bollinger John C. Huffman John N. Huffman 《Journal of Science Education and Technology》2003,12(3):277-284
The World Wide Web contains a number of collections of data files for molecules with limited usability and utility for users. We describe the design of a Common Molecules collection that provides interactive tools for 3-D visualization of molecules. Our organizational design is intuitive and our collection is large, growing, and provides not only structural information, but also historical and/or key information on the properties of the molecules in the collection. The use of the collection by students and the role of students in the development of the collection are also described. 相似文献
28.
This article reports on answers by children (Grades 1–9) to oral and written questions concerning the phase change from liquid to gas. The development of concepts was followed, proceeding from concrete to abstract ideas. Difficulties in the application of abstractions were found, and participants were frequently misled where a choice of possible correct answers was given. Many students were found to experience difficulties in problem solving even though they may have had the necessary level of knowledge. These findings lead us to emphasize the importance of explaining specific situations and experiences using clear and relevant models to suit the discussion. To this end, a number of suggestions are made for minimizing misunderstandings and enhancing understanding. 相似文献
29.
This study deals with the school instruction of the concept of weight. The historical review reveals the major steps in changing weight definition reflecting the epistemological changes in physics. The latest change drawing on the operation of weighing has been not widely copied into physics education. We compared the older instruction based on the gravitational definition of weight with the newer one based on the operational definition. The experimental teaching was applied in two versions, simpler and extended. The study examined the impact of this instruction on the middle school students in regular teaching environment. The experiment involved three groups (N = 486) of 14-year-old students (ninth grade). The assessment drew on a written questionnaire and personal interviews. The elicited schemes of conceptual knowledge allowed to evaluate the impact on students’ pertinent knowledge. The advantage of the new teaching manifested itself in the significant decrease of the well-known misconceptions such as “space causes weightlessness,” “weight is an unchanged property of the body considered,” and “heavier objects fall faster”. The twofold advantage—epistemological and conceptual—of the operational definition of weight supports the correspondent curricular changes of its adoption. 相似文献
30.
Hilal Aktamış 《Research in Science & Technological Education》2017,35(2):169-182
Background: Children generally adopt the behaviours and attitudes they see in their home environment. Because of this, education provided in the school can be effective, as long as it is supported at home and by extension to the entire environment where the child interacts. Isolating the family from school influences the continuance of the school’s educational impact. In this sense, families do have a significant impact on their child’s attitude about.
Purpose: The objective of this study is to determine how parents view science and technology, the factors that influence their views (gender, age, educational level), and the relationship between these opinions and the students’ science academic achievement.
Sample: The present study was conducted with the parents of 169 students attending randomly chosen primary schools in a city in western Turkey.
Design and methods: The ‘Scale for Determining Views of Parents regarding Science and Technology’ (SFDVPAST) was developed by the researchers and used in the present study. The scale’s reliability was 0.88. Data obtained from SFDVPAST were analysed with SPSS 11.5 using frequency (f), percentage (%), average (X), standard deviation (SD), one-way MANOVA, a univariate ANOVA for each dependent variable as a tracking test, and simple linear regression analysis to determine the relationships.
Results: At the completion of this study, findings indicated that gender does not have an impact on how parents view science and technology, but age and educational level do impact parents’ views on this topic. The science academic achievement of the student correlates with the views of his/her parents on science and technology.
Conclusions: Parents’ views towards science and technology have affected their age and education level, but have not affected their sex. In addition, parents’ positive view towards science and technology has affected their science academic achievement of the students. 相似文献