A discussion of the selection of knowledge in Swedish higher education, focusing on attempts to create free Colls in Stockholm & Gothenburg in the late nineteenth century. The actors, their class ...interests, & their interests in knowledge are examined. The impact of structural factors on actors & their intentions is described in terms of the selection of knowledge, describing how some kinds of knowledge tended to be preserved, while others were kept outside the Us. 11 References. Modified AA
Pedagogik i arbetslivet Ellström, Per-Erik; Löfberg, Arvid; Svensson, Lennart
Pedagogisk forskning i Sverige,
2005, Letnik:
10, Številka:
3/4
Journal Article
Recenzirano
I denna artikel ges en bild av hur forskningen om pedagogik i arbetslivet utvecklats i Sverige och vilka områden den har rört. Även om de områden som här urskiljs delvis går in i varandra ...representerar områdena relativt tydligt olika fokuseringar. I och med att utbildning, lärande och kompetensutveckling i arbets-livet kom att bli ett pedagogiskt forskningsområde tillfördes inte enbart ny kunskap till vår förståelse av människan i arbetslivet. Arbetslivspedagogisk forskning berikar också pedagogikämnet genom att ge ett breddat underlag för teori och metodut-veckling inom ämnet. Villkoren för lärande som ett allmänt kunskapsområde ges genom denna forskning en tydligare plats inom pedagogiken.
Two small-scale double emulsion techniques for incorporation of formaldehyde-inactivated rotavirus particles (FRRV) into poly(lactide-co-glycolide) (PLG) microspheres were developed and optimised. ...The effects of high-speed homogenisation versus vortex mixing on the double emulsion stability, microsphere size, entrapment efficiency and in vitro release of FRRV in the second emulsification step were studied. A stable double emulsion was verified only when using vortex mixing in this step. Slow removal of the organic phase allowed measurement of the size of the emulsion droplets and subsequent prediction of the size of the resulting microspheres. Microspheres in the size range of 1–10 μm were prepared using both techniques. The homogenisation technique was sensitive to changes in the operating time, the emulsification energy and the volume of the outer aqueous phase, while the vortex technique was more robust. Rotavirus was released in vitro in a triphasic manner with both techniques. The more robust vortex technique was selected for preparation of PLG microspheres containing rotavirus for in vivo studies. After immunisation of mice with a single intramuscular injection, the PLG-FRRV microspheres elicited an IgG antibody response in serum detected by ELISA equally high as that elicited with FRRV alone. These results indicate that the antigenicity of FFRV was retained after incorporation into PLG microspheres using the vortex technique.
We provide a derivation of the Poisson multi-Bernoulli mixture (PMBM) filter for multi-target tracking with the standard point target measurements without using probability generating functionals or ...functional derivatives. We also establish the connection with the \delta-generalised labelled multi-Bernoulli (\delta-GLMB) filter, showing that a \delta-GLMB density represents a multi-Bernoulli mixture with labelled targets so it can be seen as a special case of PMBM. In addition, we propose an implementation for linear/Gaussian dynamic and measurement models and how to efficiently obtain typical estimators in the literature from the PMBM. The PMBM filter is shown to outperform other filters in the literature in a challenging scenario.
Felodipine is a vasodilating calcium channel blocker of the dihydropyridine type. The effects of felodipine on post-ischaemic renal function were evaluated in rats subjected to bilateral renal artery ...occlusion for 30 or 60 min. In a first set of experiments the recovery of renal function after 30 or 60 min of renal artery occlusion was followed intermittently for 16 days by endogenous creatinine clearance. Renal function was better preserved in rats given felodipine (45 nmol/kg i.v.) during the occlusion period than in vehicle-treated control rats. The survival rate after 60-min occlusion was 11% in controls but 70% in the felodipine-treated rats. After occlusion for 30 min the survival rate was similar in the two groups, but renal function recovered faster in the felodipine group than in the controls. In a second series, acute renal damage was evaluated by the extent of erythrocytes trapped in the kidney after 30-min reperfusion following 60-min renal artery occlusion. Felodipine administration (45 nmol/kg) during the occlusion reduced renal damage compared with vehicle controls. Kidney weight and systemic haematocrit were also better maintained in the felodipine-treated rats. Furthermore, renal damage was reduced by the t-butyl analogue or felodipine. H 186/86, which is devoid of vasodilatory effects. The results demonstrate that treatment with the vasodilator calcium channel blocker felodipine protects the kidney from ischaemic/reperfusion injuries. The tissue protection is not related to the haemodynamic effects alone, since the haemodynamically inactive dihydropyridine H 186/86 also reduced the extent of renal damage. An additional antiperoxidant or scavcnger-like effect inherent in the dihydropyridine molecule is suggested.
For intelligent transportation systems (ITS) to achieve situational awareness beyond their sensing horizon and to harness coordination capabilities, some form of cooperation will be required. Such ...cooperation is enabled by vehicle-to-vehicle and vehicle-to-infrastructure wireless communication. The integration between the communication, signal processing, and control sub-systems is non-trivial and requires a co-design, which in turn requires collaboration between these three disciplines. This paper presents a possible evolution of these three disciplines within the context of ITS, as well as several challenges and opportunities.
Two-filter Gaussian mixture smoothing with posterior pruning Rahmathullah, Abu Sajana; Svensson, Lennart; Svensson, Daniel
17th International Conference on Information Fusion, FUSION 2014, Salamanca, Spain, 7-10 July 2014,
2014
Conference Proceeding
Odprti dostop
In this paper, we address the problem of smoothing on Gaussian mixture (GM) posterior densities using the two-filter smoothing (TFS) strategy. The structure of the likelihoods in the backward filter ...of the TFS is analysed in detail. These likelihoods look similar to GMs, but are not proper density functions in the state-space since they may have constant value in a subspace of the state space. We present how the traditional GM reduction techniques can be extended to this kind of GMs. We also propose a posterior-based pruning strategy, where the filtering density can be used to make further approximations of the likelihood in thebackward filter. Compared to the forward–backward smoothing(FBS) method based on N-scan pruning approximations, the proposed algorithm is shown to perform better in terms of track loss, normalized estimation error squared (NEES), computational complexity and root mean squared error (RMSE).
In this paper, we evaluate the performance of labelled and unlabelled multi-Bernoulli conjugate priors for multi-target filtering. Filters are compared in two different scenarios with performance ...assessed using the generalised optimal sub-pattern assignment (GOSPA) metric. The first scenario under consideration is tracking of well-spaced targets. The second scenario is more challenging and considers targets in close proximity, for which filters may suffer from coalescence. We analyse various aspects of the filters in these two scenarios. Though all filters have pros and cons, the Poisson multi-Bernoulli filters arguably provide the best overall performance concerning GOSPA and computational time.
To improve our understanding of factors influencing the success of natural regeneration with downy birch (Betula pubescens Ehrh.) and silver birch (Betula pendula Roth) on abandoned farmlands, a ...survey was conducted to analyse the effects of site conditions and site preparation characteristics. The study was based on a sample plot inventory conducted in one northern and one southern district of Sweden, in which 29 successfully established, naturally regenerated stands, about to be cleaned or thinned, were assessed. Radical site preparation increased stand density and uniformity of established regeneration, and gave faster initial development, than establishment without site preparation on former leys or meadows. Large proportions of the total sample area were classified as moist, and soils consisting of sandâfine sand or peat were frequent. The frequency of birch stems was highest in mesic sites, and on soils consisting of sand, sandâfine sand or peat. Distances to seed-trees were generally shorter than 80 m, and downy birch was the dominant species in most stands.
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