Filtyp
Mörk materia är en av huvudkomponenterna av universum. Det går inte att observera den på något direkt sätt, men dess närvaro är uppenbar, eftersom rörelsen av stjärnor och gas påverkas av dess dragningskraft. Mörk materia bildar gravitationsbundna klumpar som kallas för halos. Att förstå dessa objekt utgör en grundläggande del av kosmologin, vilket är vetenskapen som handlar om universums usprung
Popular Abstract in Swedish Lunds strängfragmenteringsmodell beskriver hur färgade partiklar (kvarkar och gluoner, tillsammans kallade partoner) som produceras vid högenergetisk partikelkollisioner omvandlas till färgneutrala hadroner. Denna avhandling utvecklar och utforskar ett alternativt tillvägagångssätt till modellen. Den nya infallsvinkeln förbättrar modellen för system som består av många The Lund string fagmentation model was reformulated as a process along the boundary curve of the string called the directrix, in order to treat multigluon strings according to the Lund model area law. It was found that the hadrons in the final state could be collected into several groups, in such a way that the energy-momenta of the hadrons in a group lie in a plane in the Minkowski space within s
Public–Private Partnerships (PPPs) constitute a crucial vehicle in delivering infrastructure. In the transport sector the primary project sponsors are construction companies, which over the last few decades have transformed to strong international actors. In order to study growth strategies stemming from the PPP agreement, a conceptual game theoretic model built on four institutional rationalitiesPublic–Private Partnerships (PPPs) constitute a crucial vehicle in delivering infrastructure. In the transport sector the primary project sponsors are construction companies, which over the last few decades have transformed to strong international actors. In order to study growth strategies stemming from the PPP agreement, a conceptual game theoretic model built on four institutional rationalities
Online engagement with criminal cases is often interpreted in either punitive or crowdsourcing terms, but interactionist and ethnomethodological analyses can disclose other and more fundamental aspects. This chapter looks closely at a particular practice among posters on the Swedish platform Flashback: that of summing up the discussion ‘so far’. To sum up is a delicate and vulnerable act of rhetorOnline engagement with criminal cases is often interpreted in either punitive or crowdsourcing terms, but interactionist and ethnomethodological analyses can disclose other and more fundamental aspects. This chapter looks closely at a particular practice among posters on the Swedish platform Flashback: that of summing up the discussion ‘so far’. To sum up is a delicate and vulnerable act of rhetor
Popular Abstract in Swedish Stokastika effekter är av stor betydelse i många biofysiska system. Evolution, djurs sökande efter föda, spridning av virusinfektioner och stamcellsdifferentiering, är alla exempel på processer som på ett eller annat sätt är stokastiska till sin natur. Syftet med denna avhandling är att undersöka de verktyg som ofta används för att kvantifiera slumpmässighet i naturen oThe role of stochasticity throughout many biophysical systems is of great importance. From evolution to foraging, from the spreading of viruses to cell fate, all hinge in one way or another on inherent stochasticity. The aim of this thesis is to explore the tools often used to quantify randomness in nature, and employ these tools on a selected range of biophysical systems (Papers I-IV). In these p
Popular Abstract in Swedish Studier av enstaka makromolekyler gör det möjligt att få insikt i och karakterisera viktiga biologiska processer. DNA, livets molekyl, är av särskilt intresse här. I denna avhandling användar vi metoder från statistisk fysik för att studera olika aspekter av DNA i nanokanaler och dess smältegenskaper. DNA-smältning är inte bara relevant för förståelsen av denna molekylsInvestigation of single macromolecules makes it possible to gain insight into and characterize important biological processes. DNA as the molecule of life is of special interest here. In this thesis tools from statistical physics are used to study different aspects of DNA confined to nanochannels, with particular regard to its denaturation properties. The study of DNA melting from the theoretical
Mellan hösten 2019 och våren 2020, fängslades både professionella och amatöra astronomer av de besynnerliga händelserna av Betelgeuse. Den särskiljande, lysande röda supergiant av Orions axel, vanligtvis den tionde ljusaste stjärnan på himlen, började dämpa sig dramatiskt. Detta fick många att spekulera om dess överhängande förstörelse i en kataklysmisk supernovaexplosion. Man tror nu att denna tiThe role of massive stars (those with masses greater than eight solar masses) in the chemical enrichment of galaxies and renewed star formation forms an important field of fundamental research in modern astrophysics. The complex nature of massive star evolution produces formidable challenges in furthering our understanding of the processes driving massive star evolution. Our ever-changing picture
Denna sammanläggningsavhandling berör beräkningar som behövs för precisionsfysik vid låga energier inom Standardmodellen, särskilt högre ordningars korrektioner. I avhandlingens två första artiklar introduceras beräkningar på ordning p8 i kiral störningsräkning, vilket är en effektiv fältteori för QCD vid låga energier. De sista två artiklarna handlar om myonens anomala magnetiska moment och de haThis thesis concerns higher order calculations needed for precision physics in the low energy region of particlephysics. Of the four papers it contains, the first two introduce calculations at order p8 in the power countingof chiral perturbation theory, which is an effective field theory of QCD at low energies. The remaining twopapers concern the hadronic contributions to the muon anomalous magnet
Introduction: In this thesis, I critically examine three discourses, prevalent within the 'field' of sexual violence in migration. Methodology: Taking a poststructuralist approach, I deconstruct the beforementioned discourses in a threefold analysis. Results: I find, that the binary gender system is still dominating, and that certain ideas about 'men' and 'women', their bod
This thesis presents a case study on the application of artificial intelligence (AI) in hydrology using two approaches. This topic was chosen since AI is an important tool, and water is a vital resource. The first case is on leakage detection with artificial data, while the second is on precipitation prediction with real data. For leakage detection, a random forest (RF) model and an artificial neuWater is the most vital resource, yet globally, 30% is lost through leaks. By implementing artificial intelligence (AI), this thesis has developed methods to locate leaks with high precision, as well as models to improve accuracy on satellite-based precipitation data. This thesis investigates two applications of AI on real-world problems; detecting water leaks and improving precipitation data. Th
This study aims to examine the online afterlife of the slasher film Sleepaway Camp (1983, Robert Hiltzik) and how this afterlife relates to the queer elements in the film and its role as a cult film. By combining analytical perspectives and tools deriving from film studies and media studies, through applying film analysis as a method and using a netnographic approach, the fields complement each ot
Food insecurity is a persistent challenge in the developing world, particularly the Sub-Saharan African region. Based on the latest report on the state of the World Food Insecurity, an estimate of 28% of the population in the Sub-Saharan Africa is recorded to be malnourished. This enduring challenge, therefore, requires further studies to shed light on the underlying causes of the problem and find
Decision making is one of the most critical tasks that can have an impact on organisations’ performance. To rely on decisions, organisations need to consider effective decision making. Hence to make effective decisions, most organisations are moving towards data driven deci-sion making with the aim to increase profits and reduce costs that can lead them to a compet-itive advantage. However, adopti
