Wood-based light-weight I-beams are today widely used in the construction industry. An important feature of these beams is that the user can make holes in the web where needed. Today there is no general method used to calculate the reduced strength of these beams with a hole in the web. The calculation methods vary between the manufacturers and are commonly based on empirical results. The aim of t

This thesis describes the development of a new h-adaptive method for shell elements in the explicit FE-code LS-DYNA. Adaptivity is used to obtain accurate results for large deformation analyses to a low computational effort. However, the present adaptive method available in LS-DYNA is based on a geometrical simplification. When the mesh is refined, the bending deformation of the shell is not consi

The geometry of a loud speaker cavity often gets a complicated geometry with sharp corners and narrow ducts. For this kind of shape the internal energy losses caused by viscosity and thermal conduction play an important role in the acoustic behavior. Today there is no method that sufficiently predict these effects. In this report the analogy between the loudspeaker cavity, a simple mass and spring sy

The indoor climate conditions in buildings have changed in the last decade due to more efficient climatic systems, floor heating systems and larger open floor areas with more natural light. These factors all give increased annual variations in the humidity and the temperature in parquet floors. Such variations can result in troublesome deformations, glue line delamination and development of cracks

In this master’s project, a design tool for bolt fixed laminated glass was developed, based on linear-elastic finite element theory. The program produces images of the deflections and stress distributions in bolted glass panes. A two-dimensional triangular mesh, created by an external mesh generator, was extended to a three-dimensional mesh comprising 15-node wedge elements. A least-square method was

When building below ground level in cities the regulations regarding deformations of surrounding soil are very strict. When using conventional methods of calculation it is difficult to predict the occurring deformations. This is why it has become more common to use FE-modeling to determine deformations. With FE-modelling it is possible to take the interactions between soil and construction into co

Concrete hardens as a result of chemical reactions between water and cement. Cement is a hydraulic binder, in the reaction the cement binds water-molecules. This is an exoterm process, heat is produced during the reactions. How fast this process proceeds is much depending of the temperature. The amount of heat produced during the hardening of the concrete is also depending on the thickness of the

Studier visar att sömnbesvär vid psykiska besvär förekommer relativt ofta. Undersökningar visar även samband mellan schizofrenisjukdom och sömnproblem. Det råder brist på studier där man undersökt personer med schizofreni gällande deras erfarenheter kring sin sömn och sina sömnvanor. Syftet med studien var att undersöka hur dessa personer upplever sin sömn. Tio personer med schizofreni inom rättsp

Licensavtal spelar en betydelsefull roll för att olika typer av immateriella rättigheter ska kunna utnyttjas på ett ekonomiskt effektivt och ändamålsenligt sätt. Istället för att behöva investera stora mängder kapital för att kunna omsätta sina idéer eller sin framtagna design till faktiska produkter, kan en rättighetsinnehavare erhålla relativt snabb och säker avkastning genom att någon annan – eLicensing agreements play a critical role in the enabling of economically efficient and purposeful ways to exploit intellectual property rights. Instead of having to invest large amounts of money, time and energy to turn one’s ideas, designs or creative expression into actual products, an intellectual property owner can obtain a reasonably swift and reliable return by letting somebody else – a lic

The purpose of the study was to examine differences in the accuracy of voice identification tasks between an experimental group (N = 56) consisting of security personal, and a control group (N = 44). In addition, calibration methodology was employed in order to examine if the experimental group exhibited a higher confidence level in their identifications than the control group. No significant diff

I den här studien undersöks 68-vänsterns syn på konflikten i Mellanöstern. Genom att använda Laclau & Mouffes diskursteori har jag undersökt på vilket sätt de ”reaktionära” arabiska staterna och regimerna framställs, samt hur man betraktar de palestinska motståndsrörelsernas kamp i relation till de arabiska samhällena. Studiens källmaterial är tidskrifter som kopplas till 68-rörelsen samt den

Through this degree project, we have come up with effective methods in the computer program ArchiCAD that architects use during project planning for buildings. The purpose of the degree project was to examine how architects and software developers use ArchiCAD effectively, in the building process so that also information transfer to other actors works. The theory of the degree project deals with t

This paper examines, through an online survey and three semi-structured interviews, the topic of conflicts over governmental conservation work. The main objectives of the paper have been to study to what extent conflicts is an element of the everyday governmental conservation work, and how the government officials look upon the phenomena. The study shows that almost 80 % of the government offic

I den här studien undersöker vi huruvida individers explicita attityder till olika former av partnervåld ändrar sig eller inte efter ett interventionsmoment, samt om detta skiljer sig på grund av individernas tendenser till anknytningsstil. Deltagarna i studien var gymnasieelever i årskurs tre (N= 98) vilka delades upp i en kontrollgrupp och en interventionsgrupp. Samtliga fick besvara enkäterna A

Vid arbetet med efterbehandling av förorenad jord har Miljöförvaltningen i Malmö noterat att minst 90 % av saneringarna i Malmö sker genom uppgrävning och bortforsling av jordmassorna, så kallad schaktsanering. En stor del av de uppgrävda jordmassorna deponeras, men en del renas och återanvänds inom deponier. En önskan från Miljöförvaltningen är att sanering sker med alternativa metoder, där den fThe Environment Department in Malmö has, during the work with remediation of contaminated soil, noted that at least 90% of the decontaminations in Malmö are done by excavation and removal of soil, so-called excavation remediation. Most of the excavated contaminated soil is deposited, but some is purified and reused in landfills. A wish expressed by the Environment Department is that the decontamin

Abstract Inbreeding (selfing) was investigated already by Charles Darwin, who wanted to understand why outcrossing (non-selfing) is the predominant mating choice in the kingdom of plants. He found that inbreeding often results in less viable and fertile plants compared to outcrossing, what is known as inbreeding depression, and can be explained with increased homozygosity in the inbred, making the

Olikheter i nationers lagstiftning och mellan olika rättsystem vad gäller restriktioner i hur man värderar säkerhetsrätter där själva säkerheten inte befinner sig i borgenärens besittning har länge försvårat marknaden för finansiering och leasing, särskilt vad gäller högt värderad egendom såsom luftfartsutrustning, rullande järnvägsmateriell och tillgångar avsedda för rymden. Dessutom ger lagstift

This thesis assess three different conditional variance models from the GARCH family - GARCH(1,1), EGARCH(1,1) and GJR-GARCH(1,1) - and their accuracy in making one-day forecasts together with Value at Risk. The study is made on the daily returns of the OMX Stockholm 30 index between 2002-01-01 and 2010- 12-31. A five year in-sample set was used to estimate the model parameters and to make one-day