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Gas phase polyethylene reactors are able to produce several different grades of polymer. Adapting to market conditions requires grade transitions, associated with costs in terms of raw material and temporary production of lower priced off-specification products. In this paper, both stationary production and dynamic grade transitions are optimized to maximize profit, i.e., economic process optimiza
Cybersecurity has never been more relevant than it is today, as attacks become increasingly sophisticated. To keep devices safe from threats, a new type of smart firewall has become an active area of research. This type of firewall can dynami- cally configure itself based on incoming network traffic using reinforcement learn- ing. This research has shown promising results; however, its impact on r
Non-terrestrial networks (NTNs) are expected to become an important component of future sixth-generation (6G) wireless systems by extending broadband coverage to remote, maritime, aerial, and underserved areas. Among different NTN platforms, low Earth orbit (LEO) satellite constellations are particularly attractive due to their lower propagation delay compared with geostationary systems. However,
Traditional football analytics largely evaluates players through on-ball events such as shots, passes and dribbles, leaving the much longer periods of off-ball play poorly measured. This thesis develops a spatial framework for evaluating individual player contributions in crossing situations, where a cross is defined as an aerial or driven delivery from a wide area into the central penalty zone. T
Direct-to-Device (D2D) communication in Non-Terrestrial Networks (NTNs) enables smartphones to connect directly to satellites, extending wireless coverage beyond terrestrial networks. This thesis presents the design of a smartphone antenna optimized for NTN operation, followed by a link budget analysis and Electromagnetic Field (EMF) exposure assessment. The proposed solution is a dual-band circu
The Nordic countries have often been seen as “fore-runners” of energy efficiency in buildings – in both the implementation of policy instruments and the evaluation of effects. Since the 1970s, the Nordic countries have introduced a range of policy instruments for energy conservation in buildings. The choice of instruments and experiences, however differs between countries. The aim of this study is
Behandling av patienter med alkohol- eller drogberoende är en komplex flerstegsprocess som behandlar både substansberoende och co-morbiditeter. Riskfyllda livsstilar, inklusive tobaksrökning, otillräcklig fysisk aktivitet och ohälsosam kost, som kan förvärra hälsotillståndet och själva beroendebehandlingen, är mycket vanligt bland dessa patienter. Det komplexa hälsofrämjande programmet (Very IntegTreatment of patients with alcohol or drug use disorders is a complex multistage process addressing the substance addiction and co-morbidities. The risky lifestyles, including tobacco smoking, insufficient physical activity and unhealthy diet, which can aggravate health condition as well as addiction treatment itself, are very common among these patients. The complex health promotion (Very Integra
Temperature and precipitation extremes are the dominant causes of natural disasters. In this study, seven indices of extreme temperature and precipitation events in Gansu Province, China, were analysed for the period 1961–2017. An abrupt climate shift was recorded during 1980–1981. Thus, the study period was divided into a preshift (before the climate shift) period 1961–1980 and an aftshift (after
Positron emission tomography (PET) with (18)F-FDG is a valuable tool for staging, planning treatment, and evaluating the treatment response for many different types of tumours. The correct volume estimation is of utmost importance in these situations. To date, the most common types of phantoms used in volume quantification in PET utilize fillable, hollow spheres placed in a circular or elliptical
The interactions between airway epithelial cells (AECs) and dendritic cells (DCs) play an important role in the sensitization towards airborne allergens. Not much is known about the underlying mechanisms and novel in vitro approaches are needed, which include the different involved cell types in order to investigate what happens at the molecular level during sensitization. In this project, one aim
Objective. To investigate in a prospective study the relationship between age, pre-operative status, waiting time and post-operative outcome in patients assigned for unilateral total hip replacement (THR) due to osteoarthritis (OA). Method. One hundred and forty-eight patients (mean age 71 yr) with primary OA of the hip were investigated pre-operatively and 3, 6 and 12 months post-operatively with
