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Two direct Tustin discretization methods for fractional-order differentiator/integrator 总被引：1，自引：0，他引：1
This paper deals with fractional calculus and its approximate discretization. Two direct discretization methods useful in control and digital filtering are presented for discretizing the fractional-order differentiator or integrator. Detailed mathematical formulae and tables are given. An illustrative example is presented to show the practically usefulness of the two proposed discretization schemes. Comparative remarks between the two methods are also given. 相似文献
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Ivo Jirásek Miroslava Jirásková Petra Majewská Michaela Bolcková 《British Journal of Religious Education》2017,39(2):122-148
The article focuses on spirituality on two semantic levels: the first one analyses participants’ experiences during a winter expeditionary course on snowshoes and considers the question of whether residing in the winter landscape with a community of other people may acquire a spiritual dimension in spite of the non-religious environment. The second level verifies whether the trans-rational method of systemic constellations may be used as a research tool, that is, as a specific source for data collection (different from other sources and methods). The research applied a phenomenological approach to the analysis of unstructured interviews (n = 12) and constellation insights; the result confirmed indisputably that certain kinds of experiences obtained in a completely non-religious environment (namely, during a winter expedition on snowshoes in the mountains) can be considered spiritual. The answer to the second question is also positive, since the application of systemic constellations results in different data in comparison with their verbal acquisition. Symbolic images that point out the system and its unaccepted elements deepen the understanding of both the individual and the nature of their spiritual experience. 相似文献
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Tertiary Education and Management - In this article, we will argue that students played an important role at several crucial junctures of modern Czech history, which secured them a central position... 相似文献
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Petr Novotný Karolína Kotvaltová Sezemská Romana Schubertová Vanda Janštová 《Learned Publishing》2023,36(2):194-204
There is evidence that national scientific journals are important for local communities despite their limited audience due to national languages and topics, like in pedagogy. However, it is not easy to assess the level of scientific rigour of local journals, as most do not have available scientometric data and are often published in minority languages. We hypothesize that a possible manifestation of a latent trait of inner authenticity of the scientific journal (meaning the journal is accepted by a community interested in developing the field which conducts internationally accepted research) could be H-index of the editorial board members. To test this approach, we evaluated H-index and gender of editorial board members (n = 490) from 17 Czech and Slovak national science-oriented scientific pedagogical journals which were not indexed or indexed in Erih+ or Scopus, and compared this with the five lowest-rated journals from the same field indexed in the Web of Science (WoS) database. The H-index of editorial board members was somewhat higher in indexed journals with those from WoS showing higher scores, and the number of board members with no discernable H-index was far greater in non-indexed journals. Editorial boards of journals indexed in WoS were mostly male, compared to a dominance of women on boards of non-indexed journals. Acknowledging the limited sample, it appears that the H-index of editorial board members may be a way to value national scientific journals. 相似文献
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Are boys that bad? Gender gaps in measured skills,grades and aspirations in Czech elementary schools
Petr Matějů 《British Journal of Sociology of Education》2015,36(6):871-895
This article examines gender gaps in academic performance (grades in mathematics and reading) between boys and girls of ninth-grade elementary schools in the Czech Republic. Our analysis is based on 2003 data from the Programme for International Student Assessment, encompassing the academic performance and family background of ninth-grade pupils. Similar to research on other countries, we find that girls strongly outperform boys in grades in Czech language, but that this gender gap is not explained by measured ability in reading nor on family background or student attributes. We also find gender bias in mathematics grades, after controlling for measured ability and other factors. Girls are also substantially more likely than boys to apply to secondary grammar schools, as well as aspire to a college education, even after controlling for measured ability. We put forward a number of theoretical perspectives that shed light on the possible causes of these empirical findings. 相似文献
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Dagmar Sigmundová Petr Badura Erik Sigmund Jens Bucksch 《European Journal of Sport Science》2018,18(8):1158-1167
This study assessed the associations between these factors in a random sample of Czech families with preschool and school-aged children. A nationally representative sample comprised 185 families with preschool children and 649 families with school-aged children (dyads; both parents and child n?=?365, mother and child n?=?730, and father and child n?=?469). The participants wore Yamax Digiwalker SW-200 pedometers at least four weekdays and both weekend days and completed family logbooks (anthropometric parameters, daily step counts (SC), and screen time (ST)). When a parent (fathers at weekends and mothers both on weekdays and at weekends) achieved 10,000 SC per day, their children were also significantly (OR?=?2.93–6.06, 95% CI?=?2.02–9.26) more likely to meet the daily SC recommendation. On the contrary, the involvement of fathers in organized leisure-time PA reduced their children's odds of meeting the SC recommendation on weekdays (OR?=?0.53, 95% CI?=?0.31–0.89) and at weekends (OR?=?0.41, 95% CI?=?0.24–0.72). The excessive ST of parents at weekends reduced the odds of their children meeting the SC recommendation (mother–child dyads: OR?=?0.44, 95% CI?=?0.26–0.72; father–child dyads: OR?=?0.63, 95% CI?=?0.37–1.06). High levels of parents’ PA contribute to the achievement of the recommended daily PA in children on weekdays and at weekends. Excessive weekend ST of parents reduces their odds of their children achieving the recommended daily PA; however, the influence of parents’ PA on their children’s achieving the recommended daily PA is stronger than the inhibitory effect of ST. 相似文献
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David Hradil Tom&#x; Grygar Janka Hradilov Petr Bezdi
ka Veronika Gr&#x;nwaldov Igor Foga&#x; Costanza Miliani 《Journal of Cultural Heritage》2007,8(4):377-386
The work is focused on identification of lead tin yellow types I and II, Naples yellow, and also on discrimination of a less common, distinct yellow pigment, the ternary Pb-Sb-Sn oxide.The knowledge about all those Pb-based yellows was in fact forgotten after introduction of modern synthetic yellows in 19th century. As late as in the last decade of the 20th century, the existence of Pb-Sb-Sn yellow and its production have been rediscovered, and only then it has been identified in colour layer of artworks.Pb-Sb-Sn yellow has recently been identified in colour layer of 17th century Italian paintings by Sandalinas and Ruiz-Moreno [C. Sandalinas, S. Ruiz-Moreno, Lead tin-antimony yellow, historical manufacture, molecular characterization and identification in seventeenth-century Italian paintings, Stud. Conserv. 49 (2003) 41–52], and here we report the finding of this pigment in Mid-European painting of the 18th and 19th centuries. Lead tin yellows, lead antimony yellow (Naples yellow), and lead antimony tin yellow were synthesized in laboratory following historical recipes, their colour was analyzed, and their structure was confirmed to provide a basis for their routine identification in microsamples of artworks by X-ray microdiffraction. Unequivocal identification of Pb-based yellows could help in authentication of traditional European paintings, because their use was temporally and also geographically specific. Combination of elemental microanalysis (X-ray fluorescence electron microanalysis) and X-ray powder microdiffraction were found very efficient in the microanalysis of colour layers of artworks with Pb-based yellows and their unequivocal identification. 相似文献
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This paper explores the contribution of virtual tools to student learning within full‐time management programmes. More specifically, the paper focuses on asynchronous communication tools, considering the scope they offer for group‐based collaborative learning outside the classroom. We report on the effectiveness of this approach for an economics course on International Money and Finance, which was delivered to two classes, following international MBA and MSc programmes, respectively, at Nyenrode University. Using questionnaire and interview data, we compare the learning experiences of both classes. Our analysis focuses on student reception of the asynchronous communication tools and the learner‐centred approach. Based on these findings, we propose a framework of pedagogical actions that may help to maximize the potential of e‐learning within hybrid course designs, particularly for novice users. Introduction d'une formation non‐synchronique de groupe à une formation de business. Réflexions sur un projet et une diffusion de cours effectifs. Cet exposé décrit la contribution d'instruments virtuels pour la formation d'étudiants dans un programme business à temps plein. Plus spécialement, cet exposé se réfère aux instruments de communication non‐synchronique considérant le domaine qu'ils offrent pour la formation collaborative en groupe en dehors de la salle de classe. Nous parlons de l'efficacité de cet approche pour un cours d'économie sur les Sciences Monétaires et de Finance Internationales qui a été distribué à deux classes suivant des programmes internationaux de MBA et MSc à l'université de Nyenrode. En utilisant des questionnaires et des dates d'interview, nous avons comparé les expériences de formation dans les deux classes. Notre analyse s'occupe de la réceptivité des étudiants concernant les instruments de communication non‐synchroniques et l'approche basé sur la formation. Basés sur ces résultats, nous proposons une structure d'actions pédagogiques qui peuvent aider à augmenter le potentiel de la formation en ligne dans le cadre de projets de cours hybrides, spécialement pour des utiliseurs novices. Einführung von gruppenbasiertem, asynchronem Lernen in Business‐Bildung. Reflektionen über effektive Kurskonzepte und –vermittlung. Dieser Bericht untersucht den Beitrag von virtuellen Instrumenten für studentisches Lernen innerhalb von Vollzeit‐Management Programmen. Er untersucht im Speziellen die asynchronen Kommunikationsmittel unter Beachtung der Möglichkeiten, die sie für ein gemeinschaftliches Lernen in Gruppen außerhalb des Klassenzimmers bieten. Wir berichten über die Wirksamkeit dieses Ansatzes, der an zwei Klassen eines Wirtschaftskurses über Internationales Geld- und Finanzwesen, die internationale MBA und MSc Kurse an der Nyenrode Universität belegen, verteilt wurde. Unter Verwendung von Fragebögen und Interviewdaten vergleichen wir die Lernerfahrungen beider Klassen. Unsere Analyse konzentriert sich auf die Aufnahmefähigkeit der Studenten bezüglich der asynchronen Kommunikationsmittel und des lernbasierten Ansatzes. Unter Berücksichtigung dieser Ergebnisse empfehlen wir einen pädagogischen Handlungsrahmen, der vielleicht das Potential des e‐Lernens innerhalb von hybriden Kursentwürfen, insbesondere für neue Nutzer, erhöhen kann. 相似文献