Sökresultat

Med mer kraftfulla grafikkort har möjligheterna utökats för vilka grafikmetoder som kan utföras i realtid. För en sådan metod, raytracing, används speciella data- strukturer, och för att kunna användas i realtid behöver dessa byggas upp snabbt.The Bounding Volume Hierarchy is an acceleration data structure used in ray tracing, allowing for faster intersection tests between rays and triangles. The goal of this thesis was to take one algorithm for rapidly generating such data structures, the Bonsai algorithm, which was initially implemented on a CPU, and instead implement it on a graphics processing unit. Many parts of the al- gorithm go

Emissions and fuel economy are evaluated for two types of biofuels, namely 2-phenyl ethanol and cyclohexaneethanol. Both are derived from lignin, a form of lignocellulosic biomass. The former and latter oxygenates have an aromatic and aliphatic (i.e. saturated) ring structure, respectively. Two parametric engine sweeps were performed. First, non-EGR operation by means of varying the load via injec

This study aims to determine the significance of different sources of financial flexibility that enables firms to respond to negative shocks or investment opportunities in form of unexpected periods of insufficient resources. The empirical study is based on a model that proxy for firms’ investment and dividend policies to further examine how possible cash shortfalls is resolved. The sample covers

Barn som berörs av avhysning ställs i likhet med barn som drabbas av utmätning av bostad inför risken att förlora sitt hem. En trygg hemmiljö anses vara av stor vikt för barnets utveckling och främja behovet av stabilitet. Barn som befinner sig i osäkra beroendesituationer riskerar att påverkas negativt på flera plan, och upplever inte sällan stark oro och försämrat psykiskt mående. I denna uppsChildren who are affected by an eviction are, like children affected by attachment and sale of a house due to enforceable debt, faced with the risk of losing their home. A safe home environment is considered to be of great importance for the child's development and promotes the need for stability. Studies show that children subject to unsettled housing situations tend to experience grave anxie

This thesis examines first-order Bregman algorithms in a primal and a primal-dual setting. The Bregman gradient descent algorithm is introduced from a majorization-minimization perspective and as a generalization of the gradient descent algorithm. Concepts such as relative smoothness and Legendreness are defined and are shown to be natural restrictions in order to show convergence results. A speci

Denna uppsats är baserad på ett projekt inom produktutveckling av nästa generations IoT-sensorer för företaget Sensative AB. Projektet tar vid där ett pilotprojekt, färdigställt i januari 2022, slutade, vid samma företag och av samma författare. Projektet fokuserar på att solidifiera och utveckla den design som gjordes i pilotprojektet, samt att utforska nya designidéer för ytterligare trådlösa seThis Master Thesis is based on a project in the product development of the next generation of IoT-sensors for the company Sensative AB. The project commences where a pilot study, finished in January 2022, concludes at the same company by the same author. The project focuses on solidifying and developing the design made in the pilot study, as well as exploring new design ideas for additional wirele

The sexuality of hivinfected people is quite controversial but nevertheless important when speaking of hivprevention. The aim of this work was to survey and analyze support and counseling practices around sexual issues given to hivpositive people by their treating medical doctors. We wanted to bring the question of hivinfected peoples sexuality and sexual behavior sometimes unprotected and the Swe

The purpose of this case study was to explore the socio-technical contexts of mobile service development within a network, the Mobile Arena Cluster functioning in Malmö, in the South of Sweden. The main research question was: how do the members of the Mobile Arena Cluster develop Mobile services. In order to answer the question, it was necessary to research first the cluster and its contexts. The

The main purpose of this thesis is to uncover the relationship that exists between the formation of purchase intentions and the factors that influence the process of intent formation; a specific focus will be given to the discovery of the impact of negative eWOM within a consumer’s pre purchase decision context. The thesis uses an inductive and qualitative design. The authors propose and apply two

Background: The underlying factors of the male predominance in Autism Spectrum Disorders (ASD) are largely unknown, although a female advantage in social communication has been pointed out as a potential factor. Recently, attention has been given to ASD as a sensory processing disorder, focusing on the audio-visual temporal processing paramount for the development of communication. In ASD, a devia

Nocturnal hawkmoths are known for impressive visually guided behaviours in dim light, such as hovering while feeding from nectar-bearing flowers. This requires tight visual feedback to estimate and counter relative motion. Discrimination of low velocities, as required for stable hovering flight, is fundamentally limited by spatial resolution, yet in the evolution of eyes for nocturnal vision, main

The increase and range extension of wolves (Canis lupus L) and brown bears ( Ursus arctos L) in Scandinavia inevitably impacts moose (Alces alces L.) populations and, as a consequence, the size and composition of the hunter harvest must be adjusted. We used a sex- and age-structured moose population model to delineate optimal harvest strategies under predation and to compare the resulting harvest

Brain-machine interfaces (BMIs) provide a uni- or bidirectional communication link between the central nervous system and the outside world. This link facilitates the studying of neuronal mechanisms underlying behavior as well as the treatment of neurological disease. Wired BMIs are limited in the sense that they restrict the mobility of the subject and they increase the risks for post-surgical co

This paper presents an analysis of a regional transport infrastructure plan in Sweden. A comparison is made of two concepts central to transport infrastructure planning in Sweden; Regional expansion and Environmentally sound transport. These concepts signify different perspectives on the benefits and problems with transport. The analysis explains how these clashing perspectives are resolved in the

Retrieval orientation refers to a pre-retrieval process and conceptualizes the specific form of processing that is applied to a retrieval cue. In the current event-related potential (ERP) study, we sought to find evidence for an involvement of the auditory cortex when subjects attempt to retrieve vocalized information, and hypothesized that adopting retrieval orientation would be beneficial for re