363 research outputs found

    Parallell Slump

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    Slumptalsgenerering er eit av dei mest fundamentale og klassiske problemai informatikk. Der er ei lang rekkje kjende gode slumptalsgeneratorarfor sekvensielle program. Parallell programmering stiller nye krav tilslumptalsgeneratorane, og ulike parallelliseringsparadigme har ulike behov.NÄr me krev at programmet skal vera deterministisk utelukker me mange avdei vanlegaste lÞysingane. Trass i at parallellisering av slumptalsgeneratorarhar vore kjend som ei utfordring i 30 Är, er der fÄ generelle lÞysingar iliteraturen. I denne artikkelen gjev me eit overblikk over kjende lÞysingar ogviser korleis splittbare slumptalsgeneratorar kan brukast til ein deterministisk,dataparellell implementasjon av genetiske algoritmar

    FrÄgan om varat

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    Development and sedimentology of the Lower Eocene deep marine gravity flow deposits in the eastern part of the Ainsa Basin, the Pyrenees, Spain

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    The Eocene Ainsa Basin is situated in the central south Pyrenees formed by collision of the Iberian plate with the Eurasien plate during Late Cretaceous to early Miocene times. The basin was formed due to movements of the central southern Pyrenean thrust system in a piggy-back fashion. The depositional system was controlled by the Mediano growth fold and the Faradada tear fault system. The climate was a secondary factor controlling the sea-level variations (Milancovich cycles). These controlling factors have been reflected in the recorded data gathered in the Arro and Charo areas (Arro sandstone body. The succession can be divided into 4 distinct units; a basal mass transport complex, an inter-channel dominating succession, a turbidite channel succession, and a channel-levee dominated succession. This may reflect a system that has been triggered by tectonism and subsequently formed instabilities on the ramp of the basin. The relative sea-level may have been influenced by movement of the structures described above, and subsequently gradients in the depositional system from the source area in the Pyrenean axial zone to the deep marine Ainsa Basin. This is reflected in the progradation of the Montanana delta and the San Eseban fandelta. Palaeo-current trends give a NNW direction of the deep marine depositional ramp system

    Trans i queerdebatt - Revolutionen som uteblev?

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    Trans in queer debates - the revolution that did not happen?Trans people have become an ideological battle ground in parts of gender and queer studies. The article traces the trans/queer relation in international scholarly debates from an enthusiastic exchange of ideas in the 1990s to increasing mutual criticism and mistrust around the turn of the millennium as queer was seen by some as a problematic approach that easily ends up in erasure of trans people's subjective experiences, and further to attempts to bridge such splits that had emerged. Finally, I discuss how queer perspectives seem to have contributed to increased flexibility in medical and legal approaches even if they are criticised for being illequipped for sociological analyses

    Likheter och skillnader i konstruktionen av terrorister som de Andra: En diskursanalys av rapporteringen kring Breivik och bröderna Kouachi

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    Denna uppsats undersöker medias konstruktion av gÀrningsmÀnnen i tvÄ fall. Bröderna Kouachi, som angrep Charlie Hebdo i Paris 2015, och Anders Behring Breivik, som utförde massakern pÄ UtÞya och bombdÄdet i Oslo 2011. Syftet Àr att undersöka om och hur gÀrningsmÀnnen konstrueras som de Andra. I undersökningen anvÀnder vi oss av en diskursanalytiskt metod inspirerad av Carol Bacchis WPR-metod, samt Ernesto Laclaus och Chantal Mouffes diskursteori. Artiklar frÄn Dagens nyheter och Aftonbladet analyseras. Uppsatsens slutsats Àr att gÀrningsmÀnnen konstrueras som de Andra i bÄda fallen, men utifrÄn olika premisser. Bröderna Kouachi konstrueras huvudsakligen utifrÄn ett orientalistiskt mönster, medan en tydlig diskursiv kamp syns i fallet Anders Behring Breivik. Bland annat representeras Breivik som den Andre utifrÄn tankar om mental ohÀlsa

    Thermal properties of concrete with different Swedish aggregate materials

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    Earlier studies show that different concrete aggregates have different thermal properties, and from this an idea to optimize thermal properties of concrete was developed. The purpose of this master thesis is to investigate thermal properties of concrete so additional costs and negative environmental impacts can be minimized. Measurements of thermal properties of different Swedish aggregates from existing quarries were investigated. It will also study if the thermal properties affect ther thermal expansion of concrete. The experimental study in this work was done in laboratory conditions. Preparation studies that were made before casting concrete were sieving aggregates, density of aggregates and moisture content. While the concrete was fresh standard tests such as slump, air-content and density of fresh concrete were made. When the concrete was 28 days old compressive cube strength and thermal expansion measurement were executed. The thermal properties (thermal conductivity, volumetric heat capacity and thermal diffusivity) were measured on aggregates and concrete cubes with the instrument Hot Disk 2500-S. The results show that the minerals quartz and magnetite have significantly different thermal properties than the other studied aggregates/concretes. The aggregate/concrete with high amount quartz mineral has high thermal conductivity and diffusivity. The aggregates/concrete with magnetite has high thermal conductivity and volumetric heat capacity. The other aggregates and concretes have similar thermal properties. The thermal expansion coefficients have similar values (12.6-15.5∙ 1 /⁰C) for different aggregates, and it was not possible to see if there was a correlation between them and the thermal properties. Thus was the value of thermal expansion coefficient in a range that is normal for concrete. The thermal shock resistance is dependent of the thermal conductivity, thermal expansion coefficient, fracture strength and elastic modulus. The concretes with high thermal conductivity also had high thermal shock resistance whereas so such concrete should better resist rapid temperature changes. The conclusions that can be drawn from this work are that the thermal properties of the aggregates will be reflected in the properties of the concrete. For both thermal conductivity and heat capacity the values for the dry concretes (RH 10-30%) were about 40-70% of the values of the aggregates. Note that this conclusion only applies for thermal conductivity and heat capacity and does not apply on thermal diffusivity, since diffusivity is the ratio of conductivity and capacity it will be similar in the concrete. In this study only two aggregates significantly affected the thermal properties: quartz has high thermal conductivity and diffusivity and magnetite rock has high thermal conductivity and heat capacity. Another conclusion from this study was high thermal conductivity also give high thermal shock resistance, where the concrete resist rapid temperature changes better

    Sedimentology of the Paleogene succession at Calypsostranda, Svalbard

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    The following study encompasses sedimentological investigations of the Calypsostranda Group. The Calypsostranda Group is comprised of Paleogene sediments where outcrops are well exposed in a coastal section at Renardodden (Calypsostranda area), on the southern shores of Bellsund in western Spitsbergen. The aim of the study is to: i) generate reliable depositional models for the evolution of the sediments of the Calypsostranda Group, through facies recognition and break-down ii) investigate and discuss source-to-sink perspectives including provenance and possible basin-development scenarios in accordance with different age datings and the tectonic history of western Spitsbergen. A limited amount of research has been conducted on the deposits of the Calypsostranda Group, however they are important to understand in the context of the regional sedimentation and tectonic history of western Spitsbergen. The succession encompasses delta plain sediments of the Skilvika Formation and paralic to marine sediments of the Renardodden Formation. Through sedimentological outcrop investigations, sixteen lithofacies have been identified from the studied sedimentary succession of the Calypsostranda Group (F1-F16) by means of facies recognition and break-down. The lithofacies were further grouped into seven sub facies associations, which can be divided into two main facies associations: i) a sub-aerial delta plain (Skilvika Formation) and ii) a paralic to marine regime (Renardodden Formation). The deposits in the Calypsostranda area were initially deposited in a prograding fluvial dominated, storm-wave influenced delta system. The fluvial dominance can be deduced from a number of observations; the abundancy of distributary channels on the delta plain, coarse-grained debris flow deposition from hyperpycnal flows on the delta front, mouth bar deposits and turbidites. The dominance of very-fine to fine-grained sand and abundancies of coal fragments in the marine deposits are indicators of a fluvial dominated system. The deposits have further been divided into a five-stage depositional model that involves a major transgressive phase drowning previously subaerial deposits, followed by normal regression with delta progradation. Evidence from the petrographical and sedimentological analysis points to a potential dual source area for the deposits in the Calypsostranda area. Findings of metasedimentary rock fragments, silica-rich biofragments and chloritoid in the thin sections account for a potential metamorphic basement derived source. In addition, a sand-rich system and coal fragments suggests an uplifted sedimentary source. Given the uncertainty of the ages of the deposits, three different palaeogeographical scenarios are presented and described.Masteroppgave i geovitenskapGEOV39

    Forest companies attitude toward preventive wind damage actions after the storm Dagmar

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    On the night of the 26th December 2011, large parts of southern Norrland were struck by the storm “Dagmar” that caused serious damage to the forests. In the past 10 years wind damage has become a hot topic after several major storms. Forest companies own 25% of the Swedish forest and thus influenced largely by wind damage. The main purpose of this study was to examine whether forest companies attitude towards preventive wind damage actions were changed after the storm “Dagmar”. The result was developed by doing interviews with two forestry companies. The forest companies who participated in the interview were SCA Medelpads management and Holmen region Iggesund, districts within the area that was hardest hit by the storm. The Interview put great emphasis on the risk assessment, preventive wind damage actions and the factors affecting the perception of them. The results was analyzed to find answers to the target setting, and to see if there was a correlation between the results from the two interviews. This was concluded by the differences and similarities in the results. The conclusion showed that SCA and Holmens perception of preventive wind damage actions in the current situation havenÂŽt changed after the storm “Dagmar”. They doesnÂŽt assess the risk of wind damage to be greater after a major storm. Preventive wind damage actions e.g. choice of wind-resistant tree species, often comes in second place because forest companies believe that those measures will reduce production in the forest and it requires too much effort in relation to profits.Natten mot den 26 december 2011 drabbades stora delar av södra Norrland av stormen ”Dagmar” som gav upphov till stora skador pĂ„ skogen. Vindskador har de senaste 10 Ă„ren blivit ett aktuellt Ă€mne efter ett flertal omfattande stormar. Skogsbolagen Ă€ger 25 % av Sveriges skogsmark och pĂ„verkas sĂ„ledes i hög grad av vindfĂ€llningar. VĂ„rt mĂ„l med studien var att undersöka om skogsbolagens syn pĂ„ vindskadeförebyggande Ă„tgĂ€rder förĂ€ndrats efter stormen ”Dagmar”. Resultatet togs fram genom att göra djupintervjuer med tvĂ„ skogbolag. Skogsbolag som intervjuades var SCA Medelpads förvaltning samt Holmen region Iggesund, distrikten lĂ„g inom det omrĂ„de som var hĂ„rdast drabbat av stormen. I Intervjuunderlaget lades stor vikt pĂ„ riskbedömning, vindskadeförebyggande Ă„tgĂ€rder samt faktorer som pĂ„verkar synen pĂ„ dessa. Resultatet har dĂ€refter analyserats för att fĂ„ svar pĂ„ vĂ„r mĂ„lformulering, samt att se om det fanns ett samband mellan resultaten frĂ„n de tvĂ„ intervjuerna. Detta bedömdes utifrĂ„n skillnader och likheter i resultatet. Resultatet visade pĂ„ att SCA och Holmens syn pĂ„ vindskadeförebyggande Ă„tgĂ€rder i dagslĂ€get inte förĂ€ndrats efter stormen ”Dagmar”. De bedömer inte risken att drabbas av stormskador som större efter stormen. Vindskadeförebyggande Ă„tgĂ€rder t.ex. val av vindtĂ„ligt trĂ€dslag, kommer ofta i andra hand eftersom skogsbolagen anser att Ă„tgĂ€rderna minskar produktionen i skogen och att det krĂ€vs för stor insats i förhĂ„llande till vinsten

    "Terminografi och facklexikografi – blir det samma sak nu nĂ€r ordböckerna blir databaser?"

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    During the last twenty years there has been some discussion as to whether technical lexicography and terminography should be regarded as (more or less) one and the same discipline or as two different disciplines. By and large, lexicographers have favoured the former opinion, whereas terminographers have tended to support the latter. In this contribution, the most important arguments brought forward in the discussion are examined and an attempt is made to answer the question whether the differences (if any) are likely to be reduced or eliminated now that technical dictionaries to an ever increasing extent are published as data bases

    BerÀttandets och berÀttelsers betydelse

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    Detta Àr Baltus ett fabeldjur. Men det Àr inte sagans fabeldjur utan en visuell framstÀllning av en berÀttelses grundstruktur, och som anvÀnds i dagens skolundervisning. Jag kommer hÀr1 att tala om berÀttelsens och berÀttandets funktioner och betydelser, varför det Àr viktigt att kunna berÀtta berÀttelser och vad berÀttelserna betyder för den enskilda individen. Exemplen tar jag ur min undersökning om förlossningsberÀttelser. 1 Lectio praecursoria 14.4.2000
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