1,090 research outputs found

    Evidence for Gluon Recombination in Deep Inelastic Scattering

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    The pomeron structure function is extracted from the latest H1 data and are subject to a QCD analysis. The result shows evidence for gluon recombination.Comment: 8 pages, 5 figure

    Geometry of the Prytz Planimeter

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    The Prytz planimeter is a simple example of a system governed by a non-holonomic constraint. It is unique among planimeters in that it measures something more subtle than area, combining the area, centroid and other moments of the region being measured, with weights depending on the length of the planimeter. As a tool for measuring area, it is most accurate for regions that are small relative to its length. The configuration space of the planimeter is a non-principal circle bundle acted on by SU(1,1), (isom. to SL(2,R)). The motion of the planimeter is realized as parallel translation for a connection on this bundle and for a connection on a principal SU(1,1)-bundle. The holonomy group is SU(1,1). As a consequence, the planimeter is an example of a system with a phase shift on the circle that is not a simple rotation. There is a qualitative difference in the holonomy when tracing large regions as opposed to small ones. Generic elements of SU(1,1) act on S^1 with two fixed points or with no fixed points. When tracing small regions, the holonomy acts without fixed points. Menzin's conjecture states (roughly) that if a planimeter of length L traces the boundary of a region with area A > pi L^2, then it exhibits an asymptotic behavior and the holonomy acts with two fixed points, one attracting and one repelling. This is obvious if the region is a disk, and intuitively plausible if the region is convex and A >> pi L^2. A proof of this conjecture is given for a special case, and the conjecture is shown to imply the isoperimetric inequality.Comment: AmS-TeX, 23 pages, 12 figures in 2 *.gif files. To appear in Reports on Mathematical Physics. Part of proceedings of Workshop on Non-holonomic Constraints in Dynamics, Univ. of Calgary, Aug. 199

    Automated approaches for band gap mapping in STEM-EELS

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    Band gap variations in thin film structures, across grain boundaries, and in embedded nanoparticles are of increasing interest in the materials science community. As many common experimental techniques for measuring band gaps do not have the spatial resolution needed to observe these variations directly, probe-corrected Scanning Transmission Electron Microscope (STEM) with monochromated Electron Energy-Loss Spectroscopy (EELS) is a promising method for studying band gaps of such features. However, extraction of band gaps from EELS data sets usually requires heavy user involvement, and makes the analysis of large data sets challenging. Here we develop and present methods for automated extraction of band gap maps from large STEM-EELS data sets with high spatial resolution while preserving high accuracy and precision

    Transition metal d-band occupancy in skutterudites studied by electron energy-loss spectroscopy

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    The transition-metal 3d occupancy of a series of thermoelectric skutterudites is investigated using electron energy-loss spectroscopy. We find that bonding causes an emptying of the 3d states in the binary skutterudites CoP3, CoAs3, CoSb3, and NiP3, while compared to the pure Fe the 3d occupancy in LaFe4P12 is significantly increased, consistent with the idea that each interstitial La atom (rattler) donates three electrons to compensate for missing valence electron of Fe as compared to Co. These experimental results are in agreement with previous models suggesting a predominantly covalent bonding between transition metal and pnictogen atoms in skutterudites, and provide evidence of charge transfer from La to the Fe-P complex in LaFe4P12

    Effects of swim speed on growth and muscle development of Atlantic salmon post-smolt

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    Masteroppgave i biologi og akvakultur - 201

    Identity, Culture and Literature: Hanif Kureishi’s The Buddha of Suburbia in Norwegian upper secondary classrooms

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    Denne avhandlingen undersĂžker hvordan lesing av flerkulturelle litterĂŠre tekster, i motsetning til andre typer tekster, kan fremme interkulturell kompetanse i norsk videregĂ„ende engelskfaglige klasserom. NĂŠrmere bestemt undersĂžker den hvordan Hanif Kureishis Forstads Buddha (2017) kan brukes som kilde til Ă„ undervise i interkulturell kompetanse til norske elever. Den drĂžfter ogsĂ„ de sentrale delene av LĂŠreplanen i engelsk som presentert i Fagfornyelsen fra 2020 (LK20), den nyeste revisjonen av den norske nasjonale lĂŠreplanen. Avhandlingen benytter to forskningsmetoder: en litteraturgjennomgang, for Ă„ legge grunnlaget for temaene som tas opp i diskusjonen, og en litteratur analyse av Hanif Kureishis roman The Buddha of Suburbia (2017). Litteratur analysen fastsetter de relevante aspektene ved romanen for avhandlingen. I avsluttende kapitler drĂžfter avhandlingen de didaktiske fordelene ved Ă„ bruke flerkulturell litteratur i videregĂ„ende opplĂŠring i Norge og vil forsĂžke Ă„ svare pĂ„ problemstillingen. Det vil ogsĂ„ bli fremmet forslag til videre forskning pĂ„ dette temaet. Denne avhandlingen er teoribasert og kan pĂ„ dette tidspunktet kun gi forslag til hvordan man kan arbeide med interkulturell kompetanse gjennom litteratur i norske klasserom.This thesis examines how reading multicultural literary texts, opposed to other types of texts, can foster intercultural competence in Norwegian upper secondary English subject classrooms. More specifically, it examines how Hanif Kureishi’s The Buddha of Suburbia (2017) can be used as a source for teaching intercultural competence to Norwegian learners. It also discusses the central parts of the subject English curriculum, as presented in Knowledge Promotion of 2020 (LK20), the newest revision of the Norwegian national curriculum. The thesis utilizes two research methods: a literature review, to lay the groundwork for the topics that are being brought up in the discussion, and a close reading of Hanif Kureishi’s coming-of-age novel The Buddha of Suburbia (2017). The close reading establishes the relevant aspects of the novel for the thesis. In the concluding chapters, the thesis discusses the didactic benefits of using multicultural literature in upper secondary education in Norway and will try to answer the research question. There will also be a suggestion for further research on this topic This thesis is theory-based and at this point, it can only offer suggestions as to how to work with intercultural competence through literature in Norwegian classrooms

    Promoting Data Journalism with Purpose-Made Systems: A case study of the benefits of purpose-made data journalism systems among Norwegian Data Journalists

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    The research project presented in this thesis is a case study investigating the usefulness of purpose-made data journalism systems. The study consists of two investigations, the first informal and exploratory, and the other more extensive and rigorous. The study features interviews with Norwegian data journalists based in the city of Bergen, which constitutes the main source of data. As part of the research, a prototype purpose-made data journalism system has been developed, based on preliminary findings from the exploratory investigation. The research carried out indicates that there is potential for developing computer systems designed to solve certain specific data journalism systems, concluding with a proposed application.Masteroppgave i informasjonsvitenskapINFO390MASV-IKTMASV-INF

    Artistic expressions in landscape architecture : a example study on creativity and art to strengthen public space

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    Konsten har lÀnge varit viktig inom staden och landskapsarkitekturen. I utvecklingen av stadsrummet prioriteras funktion och evidens över konstnÀrliga och originella uttryck. Syftet Àr att diskutera pÄ vilket sÀtt konst kan bidra till att stÀrka offentliga rum i staden och vidare belysa olika skapandeprocesser som kan leda till konstnÀrliga och originella uttryck i staden. Uppsatsen bygger pÄ en litteraturstudie och en exempelstudie som ska skapa underlag för en nyanserad diskussion kring syftet. Uppsatsens litteraturstudie diskuterar tre huvudÀmnen: hur konst och konstbegreppet definierats genom historien, hur konsten pÄverkar mÀnniskan och samhÀllet och om olika teorier och lagar som berör konstens plats i landskapsarkitekturen och i det offentliga rummet. MÄlet med uppsatsens exempelstudie Àr att visa pÄ konstnÀrliga uttryck och originalitet inom arkitekturen och landskapskonsten och sedan diskutera och peka pÄ vad landskapsarkitekter kan lÀra sig av detta i gestaltandet av offentliga miljöer. Genom att tÀnja pÄ grÀnserna inom respektive yrke och viljan att skapa identitetstarka platser visar personerna hur offentliga rum kan stÀrkas. Det finns mycket landskapsarkitekter kan ta lÀrdom av frÄn arkitekter och landskapskonstnÀrer för att gestalta konstnÀrliga miljöer och skapa originella uttryck.Art has long been important in urban and landscape architecture. In the development of urban space, function and evidence are prioritized over artistic and original expression. The aim is to discuss how art can contribute to strengthening public spaces in the city and furthermore highlight different creative processes that can lead to artistic and original expressions in the city. The essay is based on a literature study and an example study that will create a basis for a nuanced discussion of the purpose. The literature study discusses three main topics: how the concept of art has been defined throughout history, how art affects people and society, and various theories and laws that affect art's place in landscape architecture and public space. The goal of the essay's example study is to show artistic expression and originality in architecture and landscape art and then discuss and point out what landscape architects can learn from this in their design of public environments. By pushing the boundaries of their respective professions and the desire to create places with a strong identity, they show how public spaces can be strengthened. There is much that landscape architects can learn from architects and landscape artists to design artistic environments and create original expressions
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