Sökresultat

SSAB Tunnplåt AB manufactures high strength steel to e.g. beams to trailers, containers, trucks and cars. In high strength steel designs the ratio width to thickness is also high and therefore the risk for local buckling is high. When buckling occurs the stress will re-distribute and large deformation will occur. It is therefore important to take buckling into consideration when dimensioning high

This bachelor thesis contains an introduction into supersymmetric quantum mechanics(SUSYQM). SUSYQM provides a different way of solving quantum mechanical problems. The thesis explains the basic concepts of SUSYQM, such as the factorization of a Hamiltonian, the definition of its superpotential and the shape invariant potentials. The SUSYQM framework was applied to some problems such as the infini

Ray Bradbury is one of the most influential American writers within speculative fiction. Critics has mostly focused on his science fiction novels, but he has a series of books that through nostalgia and fantastical elements have described a part of America, both specific and universal. The three novels Dandelion Wine, Farewell Summer and Something Wicked This Way Comes have together shaped Green T

Title: Returns on Assets and Returns on Stocks: Based on Swedish Market. Authors:Tatiana Studyanikova and Eirini Sarantopoulou. Advisor:Hossein Asgharian. Key Words: Returns on assets (ROA), returns on stocks (ROS), variation, principal component analysis, firm-specific level. Purpose: Examine whether common factors of returns on stocks and returns on assets explain most of the variation in return

Master project made at Lund Institute of Technology Department of Design Sciences, division of Industrial Design in cooperation with Basecamp Explorer. Basecamp Explorer wanted me to be involved in the development of the interior of the guest tents in their camp in Masai Mara, Kenya and the Pyrenees, France. Basecamp Explorer runs ecological tourism destinations on a handful of places in the world

Estimation of radiation damage to electronics is complex and requires knowledge of several disciplines. Such estimation is important in the assessment of design and construction of systems in radiatory applications. This can be used to approximate the lifetime of electronics and to develop strategies for both ensuring reliability of the equipment and for financial optimization. To understand the i

My talk is intended to stimulate discussions about methods in radiativetransfer for hydrodynamical model atmospheres of late-type stars. I willpresent a number a number of inherent problems, show how they arepresently tackled (if so), and ask for ideas for more efficient approaches.

AU Mic is a young planetary system with a resolved debris disc showing signs of planet formation and two transiting warm Neptunes near mean-motion resonances. Here we analyse three transits of AU Mic b observed with the CHaracterising ExOPlanet Satellite (CHEOPS), supplemented with sector 1 and 27 Transiting Exoplanet Survey Satellite (TESS) photometry, and the All-Sky Automated Survey from the gr

Chondrules are millimeter-sized spherules that dominate primitive meteorites (chondrites) originating from the asteroid belt. The incorporation of chondrules into asteroidal bodies must be an important step in planet formation, but the mechanism is not understood. We show that the main growth of asteroids can result from gas drag-assisted accretion of chondrules. The largest planetesimals of a pop

We know now that discs of gas and dust, so-called protoplanetary discs, form planets as side-products of the naturally occurring star formation process throughout the Milky Way. Young, growing planets in such discs are commonly referred to as protoplanets. In about 10\% of the so-far observed stars, this planet formation process leads to the occurrence of giant planets, such as Saturn, Jupiter, or

Hypervelocity stars (HVSs) are stars located in the Galactic halo travelling with extremely high speeds. They are produced when a binary approches the supermassive black hole (SMBH) in the Galactic Center (GC) and gets tidally broken up. In this process one of the stars is ejected with high velocity. The angle between the velocity of the incoming binary and the velocity of the ejected HVS is alm