Monitoring bullying behaviours may not enhance principal's awareness of the prevalence     

Sari Fröjd  Vesa Saaristo  Timo Ståhl 《School Leadership & Management》2014,34(5):470-480

Monitoring bullying behaviours is the key aspect of a successful anti-bullying intervention. Questionnaires among pupils and principals of the same schools were utilised to measure the agreement between pupil-reported frequency and principals' estimations of the prevalence of frequent bullying in the same schools and to identify monitoring methods associated with the best agreement. The correlation between the pupil-reported frequency and the principal's estimate of the prevalence was weak. Two-thirds of the principals estimated the prevalence of frequent bullying in their schools to be four percentage points lower than the prevalence, based on pupils' reports. Questionnaires that were developed and administered by the schools themselves and unspecified monitoring methods were associated with the best agreement between pupils' reports and principals' estimates of the prevalence of frequent bullying. There is a clear need to communicate better the nationally collected data back to schools. It seems that despite the monitoring efforts, school principals were not aware of the prevalence of frequent bullying as perceived by their pupils. Awareness of the problem may require more than just available evidence.  相似文献   

Zero dynamics and funnel control for linear electrical circuits     

Thomas Berger  Timo Reis 《Journal of The Franklin Institute》2014

We consider electrical circuits containing linear resistances, capacitances and inductances. The circuits can be described by differential-algebraic input–output systems, where the input consists of voltages of voltage sources and currents of current sources and the output consists of currents of voltage sources and voltages of current sources. We generalize a characterization of asymptotic stability of the circuit and give sufficient topological criteria for its invariant zeros being located in the open left half-plane. We show that asymptotic stability of the zero dynamics can be characterized by means of the interconnectivity of the circuit and that it implies that the circuit is high-gain stabilizable with any positive high-gain factor. Thereafter we consider the output regulation problem for electrical circuits by funnel control. We show that for circuits with asymptotically stable zero dynamics, the funnel controller achieves tracking of a class of reference signals within a pre-specified funnel; this means in particular that the transient behavior of the output error can be prescribed and the funnel controller does neither incorporate any internal model for the reference signals nor any identification mechanism, it is simple in its design. The results are illustrated by a simulation of a discretized transmission line.  相似文献   

Testing patent value indicators on directly observed patent value—An empirical analysis of Ocean Tomo patent auctions     

Timo Fischer  Jan Leidinger 《Research Policy》2014

The valuation of patents is an important, albeit challenging task. Extant research to identify patent value indicators has so far relied on expert estimates of patent value, exploited patent renewal data, or depended on more indirect measures of patent value. Recently, specialized market places for patent transactions have emerged that allow us for the first time to directly observe patent's private value. One of the most prominent market places for patents is Ocean Tomo, a platform that offers periodical patent auctions. We make use of this auction data to empirically test predictions on patent value identifiers on real-world auction prices. We find empirical support for forward citations and the patent's family size; however, both indicators explain only a small variance in patent value. In contrast, our full model explains a large share of variance, making us optimistic that with increased directly observed patent value, such models can be useful tools in patent valuation.  相似文献   

Making sense out of measurement non-invariance: how to explore differences among educational systems in international large-scale assessments     

Cuellar  Edwin  Partchev  Ivailo  Zwitser  Robert  Bechger  Timo 《Educational Assessment, Evaluation and Accountability》2021,33(1):9-25

International large-scale assessment in education aims to compare educational achievement across many countries. Differences between countries in language, culture, and education give rise to differential item functioning (DIF). For many decades, DIF has been regarded as a nuisance and a threat to validity. In this paper, we take a different stance and argue that DIF holds essential information about the differences between countries. To uncover this information, we explore the use of multivariate analysis techniques as ways to analyze DIF emphasizing visualization. PISA 2012 data are used for illustration.

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Grade retention and academic self-concept: A multilevel analysis of the effects of schools’ retention composition     

Timo Van Canegem  Mieke Van Houtte  Jannick Demanet 《British Educational Research Journal》2021,47(5):1340-1360

Previous studies on the impact of grade retention on academic self-concept suffer from inconclusive findings. There is no consensus if retention yields long-term benefits that could offset its opportunity costs and, if so, under what conditions. Therefore, this article examines whether grade retention decreases academic self-concept and whether this relationship is mediated by sense of belonging. Moreover, we aim to contextualise retention research by accounting for schools’ retention composition. Based on reference group theory, the effect of grade retention composition on academic self-concept is expected to be twofold. Normative reference grouping leads to the assumption that students in high retention composition schools will exhibit lower levels of academic self-concept, because retainees’ values are more likely to spread across all students within the same school. Comparative reference grouping might lead to a moderation effect of retention composition on the relationship between grade retention and academic self-concept. Multilevel analyses on International Study of City Youth data, consisting of 2,354 students in 30 secondary schools in Ghent (Flanders), revealed a negative association between grade retention and academic self-concept, which was mediated by sense of belonging. Students in high retention composition schools had a significantly lower academic self-concept. The impact of being retained on academic self-concept is not affected by the number of retainees within a given context. Implications are discussed.  相似文献   

Kein Heimvorteil in der 1. Tischtennisbundesliga der Herren     

Timo Klein-Soetebier  Annabelle Senff  Matthias Weigelt 《Sportwissenschaft》2014,44(2):71-77

A home field advantage is given when the home team wins more than half of the games under home conditions. For team sports, this advantage has been well-established in many studies. The present study examines the home field advantage for individual sports on the example of table tennis. Therefore, all games of the men’s first German National League of table tennis (n?=?406) were analyzed for the seasons 2008/2009 to 2012/2013. There was a home field advantage of 51.48?%. A more specific measure for the home field advantage is to look at single games (“best-of-five” modus), where the home teams won more games (2.01 per competition) than the away teams (1.95 per competition). Both results were statistically not significant. A statistically significant correlation between the size of the home field advantage and the number of spectators was found, as well as an advantage by competition rules of the home team in the opening game, whereas the travel distances of the away teams did not affect the results. Accordingly, the home field advantage is less pronounced in individual sports than in team sports. The player’s performance, however, is positively influenced by the social support of home spectators and the specific competition rules.  相似文献   

Human information behaviour and physiological measurements as a basis to tailor health information. An explorative study in a physical activity intervention among prediabetic individuals in Northern Finland     

Enwald HP  Niemelä RM  Keinänen-Kiukaanniemi S  Leppäluoto J  Jämsä T  Herzig KH  Oinas-Kukkonen H  Huotari ML 《Health information and libraries journal》2012,29(2):131-140

Objective: To explore through an interdisciplinary approach the potential to tailor health information on the basis of human information behaviour (HIB) on par with the results of basic physiological measurements of individuals’ health. Methods: The data were collected at the baseline of a physical activity and diabetes prevention intervention with 72 prediabetic participants, conducted in Oulu, Finland, by the University of Oulu and Oulu Deaconess Institute in 2010. Body mass index (BMI), fitness classifications and glucose values were obtained from all prediabetic participants. The interest in, the search for and the use of information on nutrition, physical activity and diabetes were examined through a self‐report questionnaire with a response rate of 95.8%. The data were analysed with the SPSS statistics 18 software. Results and conclusions: The study shows that information behaviour of prediabetic individuals differs according to their BMI and fitness level. Poor physical fitness classifications and high BMI values were associated with an increased desire to receive tailored information on nutrition and physical activity frequently. These results add knowledge on the types and preferred frequencies of tailored information. Because of the small sample size, the results should be validated further.  相似文献   

Erratum to 5 Development of competencies across the life span     

Sabine Weinert  Cordula Artelt  Manfred Prenzel  Martin Senkbeil  Timo Ehmke  Claus H. Carstensen 《Zeitschrift für Erziehungswissenschaft》2012,15(1):207-207

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