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41.
The purpose of this study was to construct and study the impact of a research‐based sequence for teaching the concept of modelling to seventh‐grade science students. We identified students' notions of models and the aspects of school science to be addressed regarding the model concept, which were then taken into account when we planned the learning sequence. The idea of modelling in science was taught while the students were learning about the change of states of matter in seventh‐grade physics. A pre‐interview revealed that the students' notions of models were very limited, while a post‐interview showed that this improved in the course of the series of lessons. There was also a statistically significant difference in the students' understanding of modelling between our target group and a control group consisting of ninth‐grade students who had received only the normal teaching. However, a delayed post‐questionnaire completed a few months after the teaching sequence showed that the stability of learning results were dependent on whether models and modelling were used in the normal teaching conducted after the teaching sequence. Implications for teaching, teacher education and research are also addressed in this paper. 相似文献
42.
In this article, we examine content supply as a public service strategy in Finland, one of the forerunner countries of digital terrestrial television in Europe. Regarding digitalization, European broadcasters face several options from full service to a specialized mission. The case at hand is the first full digital year of 2002 in Finland. The focus is on one of the traditional principles of public service broadcasting, the diversity of programming, as it is realized in the new, digital, multichannel environment. We examine content diversity by comparing channel profiles as well by analyzing indexes of the horizontal and vertical breadth and dissimilarity of programming. In a market of two public service and two commercial analogue generalist TV channels, the five new thematic digital channels have radically altered the amount of system-wide supply, but the diversity of programming has not suffered. This is due to the specializing strategy of the public service broadcaster. Its approach to focus on factual programming is clear in its digital output but can be detected in moderation also in its analogue supply. However, with the expected increase on commercial digital supply also in terrestrial networks, there is the possibility of the generalist public service broadcaster to turn into a fragmented one. 相似文献
43.
Jarkko Mylläri Heikki Kynäslahti Olli Vesterinen Sanna Vahtivuori-Hänninen Lasse Lipponen Seppo Tella 《Scandinavian Journal of Educational Research》2013,57(5):537-550
This article discusses students' pedagogical thinking in situations where the use of information and communication technologies (ICTs) has a (well-defined) pedagogical role and rationale. By analysing students' pedagogical thinking in this setting, it is also possible to better understand their motivations and self-regulation. Pedagogical thinking as viewed from the student's angle is a new area of educational research. Our research method is a combination of the Stimulated Recall interview and the semi-structured theme interview. In addition, some background data were gathered by questionnaire to discern students' different uses of ICTs and their contexts. The findings suggest how the educational use of ICTs is considered to be meaningful and motivating by both genders and among all the interviewed age groups, in spite of the fact that an acute and vocal critique seems to develop among older students. The differences reside in students' reasoning regarding decision making in task operations between genders, which was one of the background variables—girls actively include identity and opinion, while boys emphasize the quality of performance as motives for decisions. 相似文献
44.
Sini Huemer Mikko Aro Karin Landerl Heikki Lyytinen 《Scientific Studies of Reading》2013,17(4):317-340
The study evaluated the effect of repeated reading on reading speed among 36 Finnish-speaking poor readers in Grades 4 to 6. A switching replications design was applied: Group A (n = 20) received training first, and during this period Group B (n = 16) acted as a control group. After a midpoint test, the design was switched. The training material consisted of syllables, which were practiced during 10 training sessions for a total of 50 times. The reading speed of the trained syllables increased more during training than during the control period. During training, the reading speed of pseudowords containing the trained syllables improved significantly. This improvement was found both in a computer task and in a list-reading task, which had a lower congruency with the training method than the computer task. Finally, training did not induce changes in a control (text reading) task that assessed general reading speed. 相似文献
45.
Jarmo Perttunen Heikki Kyrolainen Paavo V. Komi Ari Heinonen 《Journal of sports sciences》2013,31(5):363-370
The triple jump is a demanding field event in which a jumper must tolerate extremely high impact forces while maintaining high horizontal speed. The present study was designed to clarify the mechanical loading characteristics and the role of neuromuscular function in the triple jump. Seven national triple jumpers (4 males, 3 females) volunteered to perform 3-6 jumps. The mean best performances were 14.32 - 0.45 m and 11.90 - 0.28 m for males and females, respectively. The three longest triple jumps for each jumper were selected for final analysis. The mean contact times were 0.139 s (hop), 0.157 s (step) and 0.177 s (jump). The largest ground reaction forces were observed in the step (15.2 times body weight), while the highest peak pressures were recorded under the heel and forefoot. The plantar pressure of the lateral side of the forefoot was highly related to the length of the triple jump ( P ? 0.05-0.01). In addition, electromyograms of both legs suggested that mechanical loading places high demands on the neuromuscular system, as characterized by the high rate of activation in the pre-activity phase followed by high eccentric activity. Thus, the high activities of the gastrocnemius, vastus lateralis and hip extensor muscles seem to play an important role in preventing unnecessary yielding of the jumper during the braking phase. 相似文献
46.
Ritva S. Taipale Moritz Schumann Jussi Mikkola Kai Nyman Heikki Kyröläinen Ari Nummela 《Journal of sports sciences》2013,31(12):1155-1164
AbstractThe study examined the acute neuromuscular and metabolic responses and recovery (24 and 48 h) to combined strength and endurance sessions (SEs). Recreationally endurance trained men (n = 12) and women (n = 10) performed: endurance running followed immediately by a strength loading (combined endurance and strength session (ES)) and the reverse order (SE). Maximal strength (MVC), countermovement jump height (CMJ), and creatine kinase activity were measured pre-, mid-, post-loading and at 24 and 48 h of recovery. MVC and CMJ were decreased (P < 0.05) at post-ES and SE sessions in men. Only MVC decreased in ES and SE women (P < 0.05). During recovery, no order differences in MVC were observed between sessions in men, but MVC and CMJ remained decreased. During recovery in women, a delayed decrease in CMJ was observed in ES but not in SE (P < 0.01), while MVC returned to baseline at 24 h. Creatine kinase increased (P < 0.05) during both ES and SE and peaked in all groups at 24 h. The present combined ES and SE sessions induced greater neuromuscular fatigue at post in men than in women. The delayed fatigue response in ES women may be an order effect related to muscle damage. 相似文献
47.
This study compares the literacy and numeracy proficiencies of higher education (HE) degree holders in 21 OECD countries based on primary analysis of the national data sets collected via the OECD’s Programme for the International Assessment of Adult Competencies (PIAAC) 2012 study. The differences in the graduates’ average literacy and numeracy proficiencies amongst the OECD countries are substantial. Depending on the country, a smaller or greater proportion of a young highly educated age group does not have sufficient skills in literacy or numeracy to cope with many of the everyday tasks requiring the use of that skill. The PIAAC study challenges existing evaluation practices of the effectiveness of HE in fostering individual skills and puts into perspective the attempts to lift national average skill levels by increasing the HE sector’s intake. 相似文献
48.
Heikki Heikkilä 《Journalism Practice》2015,9(1):50-64
The media-saturated nature of everyday life is well acknowledged in current audience research, but the role of journalism for people living in this digitalised environment remains less clear. To provide a better understanding of the role of journalism and news in everyday life, this article states the case for combining two complementary analytical perspectives in cultural audience research that draw on the framework of practice theory. We need to focus on both interpersonal communication practices within social networks and on discursive practices and patterns of how people use the media. Empirically, this article draws on an extensive audience study conducted in Finland, whose findings provide a cause for moderate optimism regarding the sustaining relevance of journalism in people's everyday life in the digital era. Firstly, social networks—both offline and online—constitute a vital structure within which the output of journalism is rendered meaningful by users. Secondly, the discursive practices applied by the participants emphasise the importance of news as a central means of orientation to society and making sense of the political nature of the public world. However, much of this potential remains unknown to journalists because users' activities occur at a distance from journalism and political institutions, which poses a challenge to digital journalism. 相似文献
49.
Stelian Andrei Bejan Tero Janatuinen Jouni Jurvelin Susanne Klöpping Heikki Malinen Bernhard Minke 《Quality in Higher Education》2015,21(3):343-371
This paper reports on methodological approaches, experiences and expectations referring to impact analysis of quality assurance from the perspective of three higher education institutions (students, teaching staff, quality managers) from Germany, Finland and Romania. The presentations of the three sample institutions focus on discussing the core characteristics of quality assurance procedures applied and their expected and observed impacts, and how intended and non-intended undesirable ones are measured. It turns out that all sample institutions have already some instruments and sub-procedures in place for impact analysis of quality assurance and all of them are striving for further improvement by applying internal and external quality assurance procedures and impact analyses. Finally, a closer look at the recently revised Standards and Guidelines for Quality Assurance in the European Higher Education Area shows that the European sample institutions are on their way towards coherent quality assurance policies, while there is also room left for further improvement and investigation (for example, in implementing systematic methodologies of impact evaluation and quality policies in general). 相似文献
50.
Electronic data interchange (EDI) provides means for interorganizational communication, creates network externalities, requires an advanced information technology (IT) infrastructure, and relies on standards. In the diffusion of such innovations, institutional involvement is imperative. Such institutions contain governmental agencies, national and global standardization organizations, local government, and nonprofit private organizations like industry associations. The last type of organizations we call intermediating institutions. They intermediate or coordinate ("inscribe") the activities of a group of would-be adopters. Unfortunately, little is known of how these organizations shape the EDI diffusion trajectory. In this article we examine one specific type of intermediating organizations?industry associations?and how they advanced the EDI diffusion process in the grocery sectors of Hong Kong, Denmark and Finland. We identify six institutional measures, placed into a matrix formed by the mode of involvement (influence vs. regulation) and the type of diffusion force (supply push vs. demand pull), that can be mobilized to further the EDI diffusion. Industry associations were found to be active users of all these measures to varying degrees. Their role was critical especially in knowledge building, knowledge deployment, and standard setting. Furthermore, institutional involvement varied due to policy and cultural contingencies and power dependencies. 相似文献