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Can climate signals help investors make sharper moves in volatile commodity markets? This study explores how weather-related risk, specifically the El Niño-Southern Oscillation (ENSO), can be used to improve portfolio performance. We incorporate the Oceanic Niño Index (ONI) into a Random Forest forecasting model to capture the complex, non-linear effects of climate anomalies on commodity returns -
A cochlear implant (CI) is a device that provides individuals with severe to profound hearing impairment (SPHI) with auditory stimulation, which makes it possible for them to develop skills related to spoken communication. We have little knowledge about how hearing with a CI influences cognitive and communicative development and there is a need for development of methods for assessment. The genera
We present a consistent way of combining associated weak boson radiation in hard dijet events with hard QCD radiation in Drell-Yan-like scatterings. This integrates multiple tree-level calculations with vastly different cross sections, QCD- and electroweak parton-shower resummation into a single framework. The new merging strategy is implemented in the PYTHIA event generator and predictions are co
This study aims to get a better understanding of what obstacles and problems organizations face when working with Open Innovation what solutions they then employ.
This project discusses the effects of recycle streams on the dynamics and performance of chemical plants. The questions addressed are: can the current industry standard tuning methods still be applied to systems with recycle, and if not, how can they be modified? This is approached by analysing the arrest time tuning method when applied to an integrating process with and without recycle. The resul
This thesis consists of six parts in which methods for image analysis and processing are studied. Two-dimensional medical images, image sequences, and three-dimensional image volumes are considered. In the first part, the concept of optical flows (OF) is employed for restoring the contracting/expanding ventricle motion in ultrasonic echocardiograms. Radial velocities obtained by a scalar approach
Popular Abstract in Swedish Teknikutvecklingen leder till att vi får allt mer avancerade elektroniska medicinska implantat. Dessa spänner idag från den välkända hjärtpacemakern till avancerade hörselimplantat, hjärnstimulatorer och implanterbara medicinpumpar. Med de allt mer avancerade implantaten har också deras behov av att ta emot styrsignaler från utsidan av kroppen, och deras förmåga att sänWith the increased sophistication of medical implants, there is a growing need for flexible high-speed communication with the implant from outside the body. Today the communication is done by an inductive link between the implant and an external coil at a low carrier frequency. Extended range and communication speed are possible to achieve by increasing the carrier frequency and the bandwidth. One
User generated data is getting more and more common. This data often expands in to hundreds of millions, if not billions, of data points. It is in the interest of every company with these vast amounts of data to make sense of them in one way or another. In machine learning, cluster analysis has been one way of trying to categorize data without supervision. Mahout is a library which runs on top of
In this thesis optimization methods for image segmentation are studied. The common theme of all the methods is that we have a histogram model for appearance terms that we optimize jointly with smoothness. Recently it has been shown that if one assumes a histogram model for appearance, it is possible to optimize an approximation of the energy using only one graph cut, by ignoring the non-submodular
There is a significant risk that the current pro-environmental efforts embedded in the prevailing paradigm (shallow ecology) will not be sufficient to solve the increasing number, severity and urgency of environmental/societal challenges – at least they appear to be unable to solve the problems in time. Through literature review and case studies, this thesis author explores how humans having direc
Asthma and rhinitis often co-exist in the same patient. Although some authors observed a higher prevalence and/or greater severity of asthma in patients with rhinitis, this view is not homogeneous and the debate continues. The aim of our study is to describe the prevalence of rhinitis in children and adolescents and to analyse their relationship with the prevalence of asthma. A multicentre study w
Bacteria that enter the bloodstream will encounter components of the cellular and soluble immune response. Platelets contribute to this response and have emerged as an important target for bacterial pathogens. Bacteria produce diverse extracellular proteins and toxins that have been reported to modulate platelet function. These interactions can result in complete or incomplete platelet activation
Family accommodation (e.g., reassurance, modifying routines, assisting avoidance) has not been explored among youth with misophonia but may have important clinical and intervention implications. We examined family accommodation in 102 children and adolescents with interview-confirmed misophonia and compared its frequency and content to family accommodation in 95 children and adolescents with anxie
Tuberculosis (TB) is the most common cause of death among people with HIV (PWH). PWH often have atypical clinical manifestations of TB, and TB disease can therefore be missed. Better screening markers could identify individuals with high likelihood of TB disease. Furthermore, the mechanisms underlying the immunopathogenesis of TB disease in PWH remain incompletely understood.This thesis is based o
