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Abstract I would like to thank my mentor Richard Murray at the Control and Dynamical Systems Department of California Institute of Technology (Caltech) for giving me the opportunity of conducting my master's thesis at Caltech and for his support during the project. I would also like to thank my other mentor Anders Rantzer at the Department of Automatic Control of Lund Institute of Technology u
In order to understand the initial partonic state in proton-nucleus and electron-nucleus collisions, we investigate the total, inelastic, and (quasi-)elastic cross sections in pA and gamma-A collisions, as these observables are insensitive to possible collective effects in the final state interactions. We used as a tool the DIPSY dipole model, which is based on BFKL dynamics including non-leading
In this work, we consider expressions for the masses and decay constants of the pseudoscalar mesons in SU(3) chiral perturbation theory. These involve sunset diagrams and their derivatives evaluated at p2=mP2 (P=π, K, η). Recalling that there are three mass scales in this theory, mπ, mK and mη, there are instances when the finite part of the sunset diagrams do not admit an expression in terms of e
In the field of computational biology, fluorescence microscopy images often constitute the input source of information. The process of binarization of raw images to delineate interesting objects requires image segmentation into signal and background pixels. Several methods to perform image segmentation exist, the Otsu method being a popular unsupervised example. The Otsu method's lack of pro
Previously, Berg and Purcell found an expression for the diffusion current of particles into a set of receptors in their paper Physics of Chemoreception. These receptors were assumed to be uniformly distributed on a spherical cell's surface and the receptors where idealized as circular patches. For their model, the particles' diffusion constant was the same for all points outside of the ce
The known isospin-breaking contributions to the K → ππ amplitudes are reanalyzed, taking into account our current understanding of the quark masses and the relevant non-perturbative inputs. We present a complete numerical reappraisal of the direct CP-violating ratio ∈′/∈, where these corrections play a quite significant role. We obtain the Standard Model prediction Re (∈′/∈) = (14 ± 5) · 10−4, whi
In this thesis, a new model for diffractive proton-proton collisions is presented. Interpreting protons as systems of many partons, we treat diffraction in terms of elastic interactions between the partons of the colliding protons. Parton emission and absorption are employed as the mechanism that in the context of a diffractive event can stabilize excited protons by reshuffling parton momenta and
Ett rent strikt ansvar, eller ett strikt ansvar, innebär ett ansvar oberoende av vållande. Det utgör därmed ett avsteg från culpaprincipen som sedan en lång tid tillbaka har varit huvudregel i svensk skadeståndsrätt. Ett strikt ansvar är ingripande men har av lagstiftaren i vissa fall ansetts motiverat och då införts i lag. Av HD:s praxis framgår att ett handlande kan åläggas med ett strikt skades
We have examined the variations in gene content and sequence divergence that could be associated with symbiotic adaptations in the ectomycorrhizal fungus Paxillus involutus and the closely related species Paxillus filamentosus. Strains with various abilities to form mycorrhizae were analysed by comparative genomic hybridizations using a cDNA microarray containing 1076 putative unique genes of P. i
We suggest one of the possible ways to compensate the large negative quantum-topological QCD contribution to the vacuum energy density of the Universe by means of a positive constant contribution from a cosmological Yang-Mills field. An important role of the exact particular solution for the Yang-Mills field corresponding to the finite-time instantons is discussed. An interesting connection of the
Finns det kvalitetsproblem i virkesleveransskedjan som påverkar slutkvaliteten på producerade byggnader med trä negativt? För att bringa klarhet i den frågan har platsbesök och intervjuer genomförts på sågverk(3st), hos grossister(3st) och vid mottagning av virke på arbetsplatser(3st). En enkät har också gått ut till 58 stycken produktionschefer i Skåne för att undersöka bland annat vilka kontroll
Examensarbetets titel Sociala medier: Frihet eller fängelse? – Instagram-användares inställning till sociala medier och dess inverkan på dem Seminariedatum 2015-05-27 Ämne/kurs FEKN90, Examensarbete på civilekonomprogrammet, 30 HP Författare William Grafström, Simon Kerrén Handledare Jon Bertilsson Nyckelord Instagram, sociala medier, destruktiva sidor, imagestrategier, låtsasliv. Syfte SyftTitle Social media: Freedom or prison? – Instagram users’ attitudes toward social media and its impact on them Seminar date 2015-05-27 Course FEKN90, Master’s thesis, 30 ECTS Authors William Grafström, Simon Kerrén Advisor Jon Bertilsson Key words Instagram, social media, destructive sides, image strategies, pretend life. Purpose The purpose of this paper is to get an understanding of how Sw
