26 research outputs found

    Konzeption und Evaluation einer Nachbereitung zum Unfallpräventionsprogramm „Crash Kurs NRW“

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    Physikunterricht in der Schule wird oft als trocken und realitätsfremd empfunden. Um diesen Eindruck zu verändern, wird Physik in einem lebensweltbezogenen Kontext unterrichtet. Solche Kontexte müssen sorgfältig ausgewählt sein, sowohl von ihrer Bedeutung für Schüler und Schülerinnen her als auch von ihrer Eignung, physikalische Fachinhalte zu vermitteln. Ein möglicher Kontext für das Teilgebiet Mechanik ist das Umfeld des Straßenverkehrs. Seit mehreren Jahren gibt es in Nordrhein-Westfalen ein Verkehrsunfallpräventionsprogramm der Polizei namens „CrashKurs NRW“, welches in Schulen stattfindet. Vorhergehenden Studien zufolge sind schulische Nachbereitungen zu diesem Programm nützlich, wahrscheinlich sogar notwendig. Anhand dieser Studien wurden verschiedene Aspekte ausgewählt, welche dann in einer eigens entwickelten fächerübergreifenden Unterrichtsreihe nochmals aufgegriffen werden. Im Bereich Verkehrsphysik wurden hierbei im Sinne des Design-Based-Research Unterrichtsmaterialien erstellt, welche durch zwei Befragungen in Schulen weiterentwickelt wurden. Die Hauptbefragung fand über einen Zeitraum von drei Monaten an drei Schulen mit ungefähr 200 Schülern und Schülerinnen statt. Die Ergebnisse zeigen, dass mit einer angemessenen Nachbereitung nicht nur Inhalte des Physikunterrichts, sondern auch darüber hinausgehende gesellschaftliche Werte vermittelt werden können. Auch Grenzen einer solchen Unterrichtsreihe wurden hierbei sichtbar. In dieser Arbeit wird dargestellt, wie die Entwicklung einer solchen Unterrichtsreihe verläuft und welche Hinweise aus den Erfolgen und Misserfolgen, sowohl für weitere Iterationen als auch für vergleichbare Projekte, gezogen werden können

    Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

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    A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

    Detection of rat hepatitis E virus in wild Norway rats (Rattus norvegicus) and Black rats (Rattus rattus) from 11 European countries

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    International audienceRat hepatitis E virus (HEV) is genetically only distantly related to hepeviruses found in other mammalian reservoirs and in humans. It was initially detected in Norway rats (Rattus norvegicus) from Germany, and subsequently in rats from Vietnam, the USA, Indonesia, China, Denmark and France. Here, we report on a molecular survey of Norway rats and Black rats (Rattus rattus) from 12 European countries for ratHEV and human pathogenic hepeviruses. RatHEV-specific real-time and conventional RT-PCR investigations revealed the presence of ratHEV in 63 of 508 (12.4%) rats at the majority of sites in 11 of 12 countries. In contrast, a real-time RT-PCR specific for human pathogenic HEV genotypes 1-4 and a nested broad-spectrum (NBS) RT-PCR with subsequent sequence determination did not detect any infections with these genotypes. Only in a single Norway rat from Belgium a rabbit HEV-like genotype 3 sequence was detected. Phylogenetic analysis indicated a clustering of all other novel Norway and Black rat-derived sequences with ratHEV sequences from Europe, the USA and a Black rat-derived sequence from Indonesia within the proposed ratHEV genotype 1. No difference in infection status was detected related to age, sex, rat species or density of human settlements and zoological gardens. In conclusion, our investigation shows a broad geographical distribution of ratHEV in Norway and Black rats from Europe and its presence in all settlement types investigated

    Detection of rat hepatitis E virus in wild Norway rats (Rattus norvegicus) and Black rats (Rattus rattus) from 11 European countries

    No full text
    Rat hepatitis E virus (HEV) is genetically only distantly related to hepeviruses found in other mammalian reservoirs and in humans. It was initially detected in Norway rats (Rattus norvegicus) from Germany, and subsequently in rats from Vietnam, the USA, Indonesia, China, Denmark and France. Here, we report on a molecular survey of Norway rats and Black rats (Rattus rattus) from 12 European countries for ratHEV and human pathogenic hepeviruses. RatHEV-specific real-time and conventional RT-PCR investigations revealed the presence of ratHEV in 63 of 508 (12.4%) rats at the majority of sites in 11 of 12 countries. In contrast, a real-time RT-PCR specific for human pathogenic HEV genotypes 1–4 and a nested broad-spectrum (NBS) RT-PCR with subsequent sequence determination did not detect any infections with these genotypes. Only in a single Norway rat from Belgium a rabbit HEV-like genotype 3 sequence was detected. Phylogenetic analysis indicated a clustering of all other novel Norway and Black rat-derived sequences with ratHEV sequences from Europe, the USA and a Black rat-derived sequence from Indonesia within the proposed ratHEV genotype 1. No difference in infection status was detected related to age, sex, rat species or density of human settlements and zoological gardens. In conclusion, our investigation shows a broad geographical distribution of ratHEV in Norway and Black rats from Europe and its presence in all settlement types investigated.The investigations in the laboratory of Rainer G. Ulrich were supported by the German Center for Infection Research (DZIF).Peer Reviewe
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