1,363 research outputs found

    Aliterate Pre-Service Teachers\u27 Reading Histories: An Exploratory Multiple Case Study

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    As a literacy instructor at a university, I regularly administered a questionnaire on reading habits and attitudes as part of the teacher education program. The findings from the surveys aligned with the results of extant literature on the prevalence of aliteracy among pre-service teachers (Applegate & Applegate, 2004; Applegate et al., 2014; Nathanson, Pruslow, & Levitt, 2008; Warmack, 2007). This dissertation uses an exploratory multiple case study approach to examine the experiences of two aliterate pre-service teacher candidates including their identity as a reader, their experiences with reading at home and their reading experiences at all educational levels. Using in-depth, semi-structured interviews, candidates recalled their experiences with reading and how they described themselves as readers. Findings indicate that both individuals had low self-efficacy with reading, likely as the result of struggles with comprehension. Both individuals also developed a preference for watching movies and looking up condensed summaries of assigned reading to gain information. An interpretation of the findings concluded there was a chronic use of some form of round robin reading throughout both participants’ educational levels. Teachers must work to provide rich opportunities to engage students in reading and be mindful of how they help students develop a regular reading habit

    Cambrian [Marjuman] trilobites (Arthropoda) of the Cow Head, western Newfoundland.

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    Conglomerates consisting of shelf-derived limestone boulders in debris flows form the fossiliferous strata of the Cow Head Group on the west coast of Newfoundland. These conglomerates have yielded in excess of 20,000 trilobites dated from mid-Cambrian into Ordovician. This study examines 1500 specimens of those trilobites in the order Ptychopariida from the earliest Upper Cambrian, the Marjuman. The Upper and Lower Marjuman are distinctly different, with only 3 genera appearing in both. Each boulder comprises a separate collection and the faunas of most are unique.Ptychoparioid trilobites are found in 15 boulders of the Upper Marjuman and 54 in the Lower. The Upper Marjuman has yielded 21 genera and 37 species, the Lower Marjuman 18 genera and 35 species. Of those, 1 family, 2 genera and 14 species in the Lower are new: the Dineidae fam. nov., Dinea and Rogeraspis gen. nov., and Brassicacephalus rhakion, Bynumia demissa, Dinea bovicephala, D. extremis, Eldoradia batilla, Holmdalia stenis, Kingstonioides delgada, K. grandilabra, Matania brachys, M. catherinae, M. hueva, M. liamae, Prolonchocephalus orcinus and Rogeraspis burkhalteri, sp. nov. In the Upper Marjuman, 1 genus, Kindleia gen. nov., and 9 species are new: Cedaria curta, C. fedora, C. superficialis, Deiracephalus genior, D. intersectus, D. ornatus, Kindleia williamae, Lecanopleura habros, and Matania kindlensis. Fifty-three plates document these and other taxa. Correlation is obtained by comparison with fauna lists reported by Lochman, Palmer and others. Westrop, Ludvigsen and Kindle established an excellent base with their analysis of Agnostoids of the Cow Head upon which this correlation is built. Others are working on the brachiopods. The project will be finalized when the remaining order, the Corynexochida, are documented and incorporated into the correlations

    A planar quasi-optical SIS receiver for array applications

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    A planar, quasi-optical SIS receiver operating at 230 GHz is described. The receiver consists of a 2 x 5 array of half wave dipole antennas with ten niobium-aluminum oxide-niobium SIS junctions on a quartz dielectric-filled parabola. The 1.4 GHz intermediate frequency is coupled from the mixer via coplanar strip transmission lines and 4:1 balun transformers. The receiver is operated at 4.2 K in a liquid helium immersion cryostat. We report accurate measurements of the performance of single receiver elements. A mixer noise temperature of 89 K DSB, receiver noise temperature of 156 K DSB, and conversion loss of 3 dB into a matched load have been obtained

    Forward-backward multiplicity correlations and leakage parameter behaviour in asymmetric high energy collisions

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    Continuing previous work, forward-backward multiplicity correlations are studied in asymmetric collisions in the framework of the weighted superposition mechanism of different classes of events. New parameters for the asymmetric clan distribution and for the particle leakage from clans in one hemisphere to the opposite one are introduced to effectively classify different classes of collisions. This tool should be used to explore forward-backward multiplicity correlations in AB and pA collisions in present and future experiments at RHIC and LHC.Comment: 14 pages, 2 figures, latex 2e with amsmat

    Bildfolgenanalyse in der Umweltphysik: Wasseroberflächenwellen und Gasaustausch zwischen Atmosphäre und Gewässern

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    Bildsequenzen von Wasseroberflächenwellen und Grenzschicht werden als neue Anwendung der Bildfolgenanalyse vorgestellt. Die Möglichkeiten der Auswertung mit Hilfe der Fouriertransformation und der Laplace- Pyramide werden diskutiert. Die quantitative Bildanalyse eröffnet weit reichende experimentelle Möglichkeiten für diesen Bereich der Umweltphysik; zugleich können sich aber auch Anstöße für die Weiterentwicklung der Bildfolgenanalyse als Methode ergeben

    Advanced secondary power system for transport aircraft

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    A concept for an advanced aircraft power system was identified that uses 20-kHz, 440-V, sin-wave power distribution. This system was integrated with an electrically powered flight control system and with other aircraft systems requiring secondary power. The resulting all-electric secondary power configuration reduced the empty weight of a modern 200-passenger, twin-engine transport by 10 percent and the mission fuel by 9 percent

    Accelerated lifetime testing and failure analysis of quartz based GaAs planar Schottky diodes

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    Accelerated lifetime tests have been performed on integrated planar GaAs Schottky diodes that were bonded to quartz substrates upside-down with a heat-cured epoxy. Results at 175°C, 200°C, and 240°C were analyzed using the Arrhenius-lognormal model. These tests predict a room temperature MTTF of 3x10^8 hours, a value that is comparable to conventional high-frequency planar Schottky diodes. This result demonstrates that the use of an appropriate epoxy to obtain GaAs devices on quartz substrates does not significantly reduce the lifetime of the devices
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