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The balance between exploration and exploitation is one of the key problems of action selection in Q-learning. Pure exploitation causes the agent to reach the locally optimal policies quickly, whereas excessive exploration degrades the performance of the Q-learning algorithm even if it may accelerate the learning process and allow avoiding the locally optimal policies. In this paper, finding the o
We measured lung density by means of x-ray computed tomography and lung mechanics in 33 workers exposed to asbestos cement and in 39 normal subjects. The exposed group showed evidence of lung fibrosis with reduced static lung volumes and lung compliance, although only three subjects had signs of interstitial fibrosis at standard chest radiography. Lung density was significantly increased in the ex
Purpose: To compare the volume rendering technique (VRT) with maximum intensity projection (MIP) for aortic diameter measurements in MR angiography (MRA) data sets. Material and Methods: Existing contrast-enhanced 3-dimensional MRA and digital subtraction angiography (DSA) data sets from 20 patients were analyzed. In each MRA data set, two aortic diameters were measured using MIP and VRT. Agreemen
In this work we present evidence for a novel diffusible extracellular factor that modulates gene expression in Bacillus subtilis. The factor was found when studying the regulation of the fatR-cyp102A3 operon. In a Spo0A(-) mutant expression of the fatR-cyp102A3 operon was almost abolished. The fatR-cyp102A3 expression defect of a Spo0A(-) mutant could be overcome either by a mutation in the abrB g
The development of antioxidant enzymes in rat brain and reaggregation cultures of fetal brain cells was studied from embryonic day 15 to postnatal day 45. Both in vivo and in culture, the copper-zinc superoxide dismutase activity first increased and then decreased with age, whereas the manganese superoxide dismutase activity increased throughout the period. Catalase showed a maximum activity at da
The application of time-resolved fluorescence methods to study the aggregation behavior in aqueous solution of anionic surfactant sodium dodecyl sulphate (SDS) in presence of trivalent counterions (Al3+) was investigated. Addition of small amounts of aluminum salt to dilute micellar solutions (< 10 wt.% SDS) resulted in isotropic fluid solutions, but for a molar ratio [SDS]/[Al(NO3)(3)] lower than
Glutathione peroxidase activity (GSHPx), total and soluble selenium in two muscles from five species were compared (chicken, duck, turkey, ostrich and lamb). The highest GSHPx activity, found in duck muscles (4.8 U/g; 3.0 U/g), was significantly higher than that in lamb (1.8 U/g; 1.4 U/g), turkey (1.2 U/g; 0.6 U/g), chicken (1.0 U/g; 0.7 U/g), and ostrich muscles (0.9 U/g; 0.8 U/g). GSHPx activiti
Aims. To investigate the astrometric effects of stellar surface structures as a practical limitation to ultra-high-precision astrometry (e.g. in the context of exoplanet searches) and to quantify the expected effects in different regions of the HR-diagram. Methods. Stellar surface structures (spots, plages, granulation, non-radial oscillations) are likely to produce fluctuations in the integrated
A FT-NIR (Fourier-Transform Near Infrared) model for moisture content has been developed for whole seeds of Swedish rapeseed (Brassica napus) by the conditions given during the harvest of 2014. Compared to Internal standardized (ISO) method 665, the final model showed very small differences in terms of repeatability and measurement uncertainty even though the measurement time was four times faster
Title: Creating flow and drive in the rehearsal – a study on choral conducting The aim of this thesis is to investigate the complex rehearsal strategies of the choral conductor and how (s)he can create “the great choral rehearsal” by observing and interviewing two choral conductors’ actions during a rehearsal and discuss the purpose of these actions. To collect data the stimulated recall method h
In Europe, sustainability in the meat and dairy industry has emerged as an issue of great concern for society. Research and pressure centre on the agricultural component and little attention has been given to the processing industry despite the integral role it plays in the European meat and dairy supply chain. This thesis aims to fill this knowledge gap by identifying the current sustainability p
Workers within the painting and decorating trade are exposed to stresses and strains to a considerable large extent. Statistics from 2012 indicate that one out of four Swedish male painters and decorators suffer from work-related disorders. The objective of this thesis was to thoroughly examine the stresses and strains that professional painters and decorators are exposed to throughout an average
The purpose of this study was to examine how women in a social science faculty at a university in Sweden perceive their career possibilities. Given that the Faculty of Social Sciences is one of those predicted to be the first to come under the so-called equality interval, the opportunity structure for women's career development is interpreted as good. In the study, seven semi-structured interv
A financial sector is needed for a country to allocate resources and store capital. The ways this sector can be organized vary greatly among countries in the world. In this thesis I will try to investigate if a country’s financial system is beneficial for its economic growth. For testing this a static linear panel data model is used, and several regressions with different proxy variables are perfo
Under 1990-talet började en ny dimension av boendesegregation växa fram – den etniska boendesegregationen. Den utmärks av en rumslig åtskillnad mellan den vita majoritetsbefolkningen och invandrade svenskar. Genom att analysera språkbruket som tillämpas av de statliga myndigheter som motarbetar den etniska boendesegregationen, ämnar föreliggande uppsats urskilja huruvida beskrivningen av olika sub
Nomos är ett träd av persona, av maskering och skarvar med lösta samman. Nomos är namnet. Nomos är lagen. Nomos är den sista generationsromanen. Tiden är ett fragment. Varat är varande, samtidigt är det vars och i. Nomos är något delat, något annat, än tillsammans, än en gestalt i minnets mörker. Minnet är ett fragment. Minnet kräver konsumtion och bearbetning; dessa kardade delmoment till stränga
Detta intersubjektiva litterära ställningstagande är ett försök till konstnärlig forskning i en kritisk och opak dialog mellan jagets egna författande, kompositionen, och dess verkställare — som läser en kopia av det.
