Sök:

Sökresultat:

7830 Uppsatser om Elastic time - Sida 1 av 522

Tidsmaskinen

!is began as a product design challenge, which stipulated broadlythat the designer be ?inspired by a subject?, whose ideas would leaddown a path of product idea evolution. From there, the goals forthe end-product would undergo rigorous revisions, re-de#nitionand re#nement. !e end-product itself would be the result of anentire thinking process.!e subject I have chosen is: Time. I want to challenge and evenalter our conventional sense of time, using principles ofdesign.

Momentbärförmåga för semikompakta ståltvärsnitt av HSQ-balkar : En modell för interpolering mellan eurokodens klass 2 och 3

The current standards for design of steel beams are divided into four classes based on the slenderness of cross-sectional parts. Depending on the section class a beams load capacity is either determined by a plastic, elastic or a reduced elastic model. The division between cross-sections calculated by a plastic and an elastic model is today done in a very harsh way with no smooth transition. This leads to a large difference in the calculated resistance for the sections located near the class limits. Elasto-plastic sections are in the current situation calculated as purely elastic and their large plastic reserve is not considered in the current standards.

Hur relaterar det optimala valet av klassificeringsmetod till datamaterialets egenskaper? : En jämförande studie mellan logistisk regression, elastic net och boosting tillämpat på klassificeringsträd.

På sistone har allt mer kritik riktats mot forskning inom klassificering. Trots att forskningen har resulterat i en uppsjö av klassificeringsmetoder finns det de som menar att den har varit ett misslyckande och pekar på det faktum att ingen klassificeringsmetod anses vara systematiskt bättre än den andra eller ens rena gissningar. Detta leder till att valet av klassificeringsmetod i många fall vilar på individuella preferenser snarare än på vetenskaplig grund. Enligt litteraturen bottnar detta faktum i ett underliggande samband mellan det optimala valet av klassificeringsmetod och egenskaperna som karaktäriserar datamaterialet.Uppsatsen tar avstamp från denna problematik och syftar till att undersöka kopplingen mellan det optimala valet av klassificeringsmetod och datamaterialets egenskaper. Denna intention uppnår vi genom att tillämpa logistisk regression, elastic net och boosting tillämpat på klassificeringsträd på sex verkliga datamaterial med varierande statistiska egenskaper.Resultatet visar att den relativa klassificeringsförmågan varierar med datamaterialen.

Elastiska bibliotek : en undersökning av två folkbiblioteks formbarhet och gränser med hjälp av begreppet elasticitet

The purpose of this Master thesis is to examine whether the term elasticity is relevant and functional to apply to public library organisations. Another aim of the thesis is to relate the term elasticity to public library organisations in a network society. Sociologist Manuel Castells provide the theoretical framework on the network society. Three investigations (meant to complement each other) in two Swedish public libraries seek to give answers to these questions.To be able to examine which areas of public library activity are elastic, I make a rough definition of what public library organisations consist of ? nine activity fields are identified using IFLA?s guidelines in combination with Swedish law of public libraries.

Jämförelse av algoritmer för polygonisering utav volymetrisk data

Digitala spel har länge använt sig av terräng, det vanligaste sättet att lagra dessa terränger är med så kallade höjdkartor. Höjdkartor har en stor begränsning, de inte kan innehålla tunnlar.Denna rapport undersöker två alternativ till höjdkartor som arbetar med voxlar. Dessa två algoritmer är Marching Cubes (Lorensen & Cline, 1987) och Constrained Elastic Surface Nets (Gibson, 1998). Syftet med undersökningen är att evaluera dessa algoritmer med avseende på tidseffektivitet, minneseffektivitet och visuell korrekthet för att ta reda på vilken algoritm som öveträffar den andra med avseende på vilken aspekt.De utförda experimenten visade att Marching Cubes (Lorensen & Cline, 1987) var den mest tidseffektiva av de två, Constrained Elastic Surface Nets (Gibson, 1998) var mest minneseffektiv och Marching Cubes (Lorensen & Cline, 1987) var mest visuellt korrekt. Vidare forskning i ämnet skulle kunna göras på terränger som är för stora för enskilda modeller..

UV-tork - analys av drift :  

The company Somas, Säffle, has assigned Fredrik Kjellin the project of finding out how ?KVTF DN250?, one of their own valves, reacts on cutting forces under production. They wish to know if and then how much it?s possible to minimize the wall thickness of the valve with neither plastic nor to big elastic deformations caused by processing.The most critical processes have been identified as rough lathing. The study has shown that the marginal for a wall thickness of two millimeters, to fall short of the yield stress in the most critical process, is good.

Dimensionering av ventilhus med avseende på skärkrafter

The company Somas, Säffle, has assigned Fredrik Kjellin the project of finding out how ?KVTF DN250?, one of their own valves, reacts on cutting forces under production. They wish to know if and then how much it?s possible to minimize the wall thickness of the valve with neither plastic nor to big elastic deformations caused by processing.The most critical processes have been identified as rough lathing. The study has shown that the marginal for a wall thickness of two millimeters, to fall short of the yield stress in the most critical process, is good.

Porösa bländverk. En materiellt ekokritisk studie av Hanna Nordenhöks prosa

In the Swedish author, poet and critic Hanna Nordenhöks (1977-) novels Promenaderna iDalbyhage (2011) and Det vita huset i Simpang (2013) the literary characters are often portrayed asdiffuse shapes with a subtile closeness to other organic bodies, places and times. While the novelsaddress themes such as colonialism and subjects becoming, they also explore the act of narratingthrough letters, journals, photographs and, in particular, fabrication. What emerge are two aesthetic,literary works that, on different levels, trouble our notion of borders between human and more-thanhumanbodies, an issue that?s essential for our understanding of human - environmentalrelationship.The purpose of this thesis is to show how the prose of Nordenhök can be read in the light of theterm porosity, where matter is understood as elastic and open for both creating and de-creatinginteractions. I will argue that the novels contribute to a deepened understanding of the relationshipbetween human subjects and more-than-human matter as elastic, and that they incorporate thisdynamic porosity within the narration itself.

Akuta effekter av assisterade hopp på kvinnliga idrottares hoppförmåga

Vertical jumping ability is an essential skill in many sports. The aim of this study wasto investigate the acute effects of assisted jumps on subsequent countermovementjump (CMJ) performance by female athletes. Nine healthy, trained female subjectsvolunteered to participate in the study. In a randomized order, they performed oneregular warm up protocol before testing their CMJ baseline value, and one warm upprotocol with an addition of five assisted jumps at 30% body weight reduction beforeanother CMJ test. Elastic cords attached to an overhead pulley system and to aharness around the subjects' upper body were used to reduce the body weight.Significant improvements were noted in jump height, 2.3 cm (7%), positive forceimpulse, 4.7 Ns (2%), vertical take off velocity, 0.1 m/s (3%), countermovement time,0.1 s (12%) and breaking time, 0.1 s (14%), p.

FEM?modeller för expansionsanalys av piplines

REINERTSEN AS performs expansion and buckling analyses of pipelines using ANSYS, afinite element modelling and analysis tool. In an expansion analysis the pipeline is modelledwith thin?walled pipe elements called PIPE20 which allows plastic deformation. However, ina recent analysis the results retrieved from the PIPE20 element were incorrect for strainsabout 1 percent. One main issue was that the PIPE20 element overestimated the strains.The purpose with this Master Thesis was to become familiar with the theories and analysismethods used in pipeline design.

PCB i byggnader : Handlingsplan för saneringsarbetet i Eskilstuna kommun

Polychlorinated biphenyls, PCBs, were used in elastic sealants in buildings during the years1956-1973. Studies of PCB have revealed that it is harmful for humans and animals,especially water-living predators and other top-predators. It is also a persistent organicpollutant and remains in the environment for a very long time. To reduce the levels of PCB inthe environment, it has to be removed from the buildings. According to Swedish law, theproperty holder has to decontaminate sealants with a PCB level of 500 mg/kg or above.

Elasticitetsmodulen i en kalkstabiliserad vägterrass : en fältstudie

Stabilization of subgrade is an internationally common technique to improve the characteristics of a soft soil. Improving the stiffness and bearing capacity of the subgrade enables the pavement to be designed with reduced depths of subbase and basecourse aggregates. This makes the stabilization technique both economically and environmentally interesting. Both natural and stabilized soils have high inherent property variability that should be considered when the characteristic value is derived. By analyzing the spatial variability in stabilized and natural subgrades it is possible get the parameters needed for reliability?based modeling of soil properties.

Utveckling av inkontinensprodukt

Together with Attends in Aneby a thesis of 15 ECTS (credits) have been undertaken. The assignment was to develop a new incontinence product for single use. Users of the product value comfort, flexibility, softness, comfort and a discreet product. Users are for individuals with incontinence problems that usually receive the products via prescription. The product must also have an attractive price and good quality from the purchase / originator's perspective.Currently there are two models that Attends supplies, which the project intends to develop, (Slips / Briefs and Pull On's).

Samling i förskolan : ? en rund stund med mycket mening

The purpose of this thesis is to gain insight into educators? views and work with circle time in preschool. To find out, I have referred to the following questions: How is your circle time performed in preschool? What objectives have teachers with the circle time? What impact has your circle time for the children in preschool?I have chosen to carry out qualitative interviews with three preschool teachers. After the interviews, I compared the educators? response to previous research.The survey shows that the circle time is one of the day´s highlights for preschool children.

Tid i all oändlighet och förgänglighet. En studie av tidsanvändningen i Sverige sedan 1980-talet

This master thesis in economics discusses the time use of today as well as the observed trends in time use over the last 20 years in Sweden. This is done by analysing time-use and consumption data at the microeconomic level, i.e. by explaining individual behaviour given the economic assumption of a rational behaviour. We reach the conclusion that the value of time is an important explanatory variable concerning the rationality in that time is used differently by different individuals and in the changed use of time. Furthermore, other variables such as social norms and the process benefit of a certain activity, i.e.

1 Nästa sida ->