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Search Results: 1 - 10 of 183 matches for " Frauke Ostermeyer "
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Socioscientific Decision Making in the Science Classroom: The Effect of Embedded Metacognitive Instructions on Students' Learning Outcomes
Sabina Eggert,Frauke Ostermeyer,Marcus Hasselhorn,Susanne B?geholz
Education Research International , 2013, DOI: 10.1155/2013/309894
Abstract: The purpose of the present study was to examine the effects of cooperative training strategies to enhance students' socioscientific decision making as well as their metacognitive skills in the science classroom. Socioscientific decision making refers to both “describing socioscientific issues” as well as “developing and evaluating solutions” to socioscientific issues. We investigated two cooperative training strategies which differed with respect to embedded metacognitive instructions that were developed on the basis of the IMPROVE method. Participants were 360 senior high school students who studied either in a cooperative learning setting (COOP), a cooperative learning setting with embedded metacognitive questions (COOP+META), or a nontreatment control group. Results indicate that students in the two training conditions outperformed students in the control group on both processes of socioscientific decision making. However, students in the COOP+META condition did not outperform students in the COOP condition. With respect to students' learning outcomes on the regulation facet of metacognition, results indicate that all conditions improved over time. Students in the COOP+META condition exhibited highest mean scores at posttest measures, but again, results were not significant. Implications for integrating metacognitive instructions into science classrooms are discussed. 1. Introduction Over the past decades curriculum authorities as well as science educators and researchers worldwide have called for changes in the way science is taught at schools (e.g., [1–4]). Modern science education should not only foster the acquisition of scientific content knowledge but engage students in scientific inquiry, in lifelong learning and in discussions about modern science problems, their technological applications as well as their personal and societal implications [1–5]. In a similar vein, the implementation of socioscientific issues into the science classroom has been proposed for more than two decades (e.g., [6–10]). Socioscientific issues represent modern science problems, such as global climate change or the loss of worldwide biodiversity, that are tightly linked to social, political, and economical concerns (e.g., [11]). They are complex, real-world scenarios at the interplay between science and society and thus, can no longer be solved by relying on scientific knowledge only [8, 10, 11]. Consequently, they fundamentally challenge the aims and scope of traditional science instruction. A growing body of research within the area of science education highlights
Socioscientific Decision Making in the Science Classroom: The Effect of Embedded Metacognitive Instructions on Students' Learning Outcomes
Sabina Eggert,Frauke Ostermeyer,Marcus Hasselhorn,Susanne Bögeholz
Education Research International , 2013, DOI: 10.1155/2013/309894
On the implementation of a deterministic secure coding protocol using polarization entangled photons
Martin Ostermeyer,Nino Walenta
Physics , 2007, DOI: 10.1016/j.optcom.2008.04.068
Abstract: We demonstrate a prototype-implementation of deterministic information encoding for quantum key distribution (QKD) following the ping-pong coding protocol [K. Bostroem, T. Felbinger, Phys. Rev. Lett. 89 (2002) 187902-1]. Due to the deterministic nature of this protocol the need for post-processing the key is distinctly reduced compared to non-deterministic protocols. In the course of our implementation we analyze the practicability of the protocol and discuss some security aspects of information transfer in such a deterministic scheme.
Efficacy of two distinct ethanol-based hand rubs for surgical hand disinfection – a controlled trial according to prEN 12791
Günter Kampf, Christiane Ostermeyer
BMC Infectious Diseases , 2005, DOI: 10.1186/1471-2334-5-17
Abstract: 20 subjects were included. Hands were washed for 1 min with soap. The bacterial prevalue was obtained by rubbing finger tips in TSB for 1 min. Then, each subject treated the hands with the reference procedure (n-propanol, 60% v/v) or the product (Sterillium? Rub, based on 80% ethanol; Avagard, based on 61% ethanol and 1% chlorhexidine gluconate) which were all applied in 3 to 4 portions each of 3 ml for a total of 3 min. Bacterial postvalues (immediate effect) were taken from one hand, the other hand was gloved for 3 h. After gloves were taken off the second postvalue was taken for the assessment of a sustained effect.Bacterial pre-values were between 4.38 ± 0.66 and 4.46 ± 0.71. Sterillium? Rub achieved the required immediate (mean log10-reduction of 2.59 ± 1.19) and sustained effect (1.73 ± 1.08) compared with the reference treatment (immediate effect: 2.58 ± 1.16; sustained effect: 1.67 ± 0.96). Avagard, however, did not achieve the required immediate (1.82 ± 1.40) and sustained effect (1.41 ± 1.08) in comparison to the reference disinfection (immediate effect: 2.98 ± 0.90; sustained effect: 2.56 ± 1.17; p < 0.01; Wilcoxon test).Based on our data, Sterillium? Rub can be regarded to be effective for surgical hand disinfection, but Avagard can not. The addition of 1% chlorhexidine gluconate to 61% ethanol (w/w) did not outweigh an ethanol concentration of 80% (w/w).The new CDC guideline on hand hygiene has indicated that the efficacy of alcohols is superior to many other active agents such as chlorhexidine gluconate or povidone iodine, also on the resident hand flora [1]. Alcohol-based hand rubs are commonly used for surgical hand disinfection in Europe [2]. Their in vivo efficacy is usually tested according to prEN 12791 under practical conditions against a reference treatment [3]. This means that a product shall not be significantly less effective compared to a reference alcohol after 0 and 3 h (gloved hand). This test method is well suitable to discriminate the
Gastarbeiterinnen in der Bundesrepublik Female Guest Workers in Germany
Frauke Miera
querelles-net , 2007,
Abstract: Monika Mattes untersucht in ihrem Buch erstmals umfassend und detailliert die Geschichte der Anwerbung ausl ndischer Frauen in der Bundesrepublik der 1950er bis 1970er Jahre. Indem sie die Kategorie Geschlecht systematisch in ihre Analyse einbezieht, vermag sie gel ufige Periodisierungen und Konzepte der bisher weitgehend geschlechtsblinden Forschung zum Thema Gastarbeit“ zu hinterfragen und teilweise neu zu formulieren. Darüber hinaus betrachtet die Autorin die strukturellen und diskursiven Verknüpfungen von Frauenerwerbsarbeit und Ausl nderbesch ftigung und verbindet auf diese Weise historische Migrations- und Geschlechterforschung. For the first time, Monika Mattes’ book presents a comprehensive and detailed examination of the history of the recruitment of foreign women workers in Germany from the 1950s to the 1970s. Through her systematic inclusion of the category of gender, Mattes questions and partially reformulates current research on the theme of “guest work,” which, till now, has been for the most part gender-blind. Moreover, the author examines the structural and discursive connections between the gainful employment of women and the employment of foreigners, thus conjoining historical migration and gender research.
Die Soldatenmütter Sankt Petersburg The Soldiers’ Mothers of St. Petersburg
Frauke Wetzel
querelles-net , 2001,
Abstract: Eine wachsende Zahl von Frauen in Ru land schafft es, gegen die tragende Rolle des Milit rs zu rebellieren. Sie leisten Widerstand gegen die undemokratischen Streitkr fte, in denen Wehrdienstleistende mi handelt und gefoltert werden. Eva Maria Hinterhuber, selbst für einige Zeit Mitarbeiterin der Soldatenmütter Sankt Petersburg, schreibt in ihrer nun ver ffentlichten Diplomarbeit über eine Gruppe von Widerst ndigen, ihre Rolle im Transformationsproze und ihre Bedeutung für das Entstehen einer Zivilgesellschaft in Ru land. An increasing number of women is successfully rebelling against the Russian army. They try to resist an undemocratic military force where soldiers are ill-treated and tortured. Eva Maria Hinterhuber, a former employee at the St. Peterburg Soldiers’ Mothers, writes in her recently published thesis about one group of opposers, their role in the process of transformation and their importance for the development of a civil society in Russia.
Vers le Sud : le voyage de Johann Georg von Dillis à travers la France, la Suisse et l'Italie en 1806
Josenhans, Frauke
RIHA Journal , 2011,
Abstract: Southern France, and Provence in particular, started to lure painters as early as in the 18th century, first and foremost French ones, and then increasingly foreign painters, notably the German landscapist Johann Georg von Dillis. In 1806, he undertook a journey in the South of France in the company of the Bavarian crown prince, the future Ludwig I. Dillis' journey is known from two different sources: a group of drawings known as the Voyage pittoresque dans le Midi de la France dessiné par Dillis (Staatliche Graphische Sammlung, Munich) and his unpublished correspondence with his brother Ignaz Dillis. The drawings, which were ordered by the prince as a visual souvenir of his tour, reflect Ludwig's interest in Roman Antiquity and thus include numerous views of ancient monuments, such as the Maison Carrée in N mes, the arc de triomphe in Orange and the ruins in Saint-Rémy-de-Provence. Apart from this group there is another body of drawings, which Dillis also made during the journey, but that he chose not to include in the Voyage pittoresque. These sheets attest to the draughtsman's attentiveness and sensibility for nature more obviously than the commissioned drawings. An official commission, the Voyage pittoresque is an exceptional artistic testimony of travel in the early 19th century. It shows that Provence became attractive for artists earlier than was previously thought.
Mapping the Past: Eduard Paulus the Elder (1803–1878) and the Archaeological Survey of Wu rttemberg
Frauke Kreienbrink
Bulletin of the History of Archaeology , 2007, DOI: 10.5334/bha.17202
Abstract: In 1858 Karl Eduard Paulus caused a minor sensation at the annual meeting of the General Association of German Antiquarian Societies (Gesamtverein deutscher Geschichts- und Alterthumsvereine, from now on referred to simply as the General Association) by presenting his archaeological map of the Kingdom of Wu rttemberg, in south-western Germany. It was the first detailed map of an entire German state to record archaeological monuments. Systematic archaeological surveys and mapping of monuments and finds had occasionally been produced by scholars from the early nineteenth century, and some archaeological maps already existed for some regions; but Paulus’ map, published in 1859, was exceptional. In this paper I will point out what was so new about this map. Moreover I will examine how the antiquarian research of Paulus in general, and his archaeological map in particular, were integrated into his extensive concept of the natural and cultural landscape. And I will discuss whether there were special conditions in Wu rttemberg that promoted such enterprises – or whether this enterprise was the consequence of the private initiative of an individual.
Networks, Contacts and Competition in the History of Archaeology – A One Day Research Meeting, Held on Saturday, 15 July 2006 at Durham University
Frauke Kreienbrink
Bulletin of the History of Archaeology , 2006, DOI: 10.5334/bha.16208
Finding Starting-Values for the Estimation of Vector STAR Models
Frauke Schleer
Econometrics , 2015, DOI: 10.3390/econometrics3010065
Abstract: This paper focuses on finding starting-values for the estimation of Vector STAR models. Based on a Monte Carlo study, different procedures are evaluated. Their performance is assessed with respect to model fit and computational effort. I employ (i) grid search algorithms and (ii) heuristic optimization procedures, namely differential evolution, threshold accepting, and simulated annealing. In the equation-by-equation starting-value search approach the procedures achieve equally good results. Unless the errors are cross-correlated, equation-by-equation search followed by a derivative-based algorithm can handle such an optimization problem sufficiently well. This result holds also for higher-dimensional Vector STAR models with a slight edge for heuristic methods. For more complex Vector STAR models which require a multivariate search approach, simulated annealing and differential evolution outperform threshold accepting and the grid search.
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