Is contemporary media ecology an ecology that offers unprecedented freedom for producing participators, the "prod-users," or could it also be understood as an ecology in which various forms of user participation are in fact conditioned, or manufactured, by professional producers? Considering the increasing research attention paid to various notions of user participation, these questions become imp

This thesis studies approximate optimal control of nonlinear systems. Particular attention is given to global solutions and to the computation of approximately optimal feedback controllers. The solution to an optimal control problem is characterized by the optimal value function. For a large class of problems the optimal value function must satisfy a Hamilton-Jacobi-Bellman type equation. Two comm

Compared to terrestrial environments, grazing intensity on belowground plant parts may be particularly strong in aquatic environments, which may have great effects on plant-community structure. We observed that the submerged macrophyte, Potamogeton pectinatus, which mainly reproduces with tubers, often grows at intermediate water depth and that P. perfoliatus, which mainly reproduces with rhizomes

Malignant brain tumor is a highly invasive and vascularized cancer. Current forms of therapy are not curative and can, at best, prolong survival for patients with this disease. The mean survival is only around 15 months. The aims of the present thesis have been to develop and explore a stem cell based vector system for delivery of therapeutic transgenes to experimental gliomas. First, we investiga

Newborn male infants have higher morbidity and mortality than female infants. Male fetal gender is associated with an overall increased risk of preterm birth and complications related to pregnancy are overrepresented in women carrying male fetuses. Several studies have shown that being newborn and of male gender are independent risk factors for adverse outcome. Even though experimental data from n

A novel algorithm for detection of saccades and postsaccadic oscillations in the presence of smooth pursuit movements is proposed. The method combines saccade detection in the acceleration domain with specialized on- and offset criteria for saccades and postsaccadic oscillations. The performance of the algorithm is evaluated by comparing the detection results to those of an existing velocity-based

Popular Abstract in Swedish Diabetes mellitus är en folksjukdom som blir allt vanligare, sannolikt till stor del på grund av vår moderna livsstil. Individer med diabetes löper större risk att utveckla många olika komplikationer, bland annat i ögonen, njurarna, blodkärlen och magtarmkanalen. Många diabetiker drabbas av förlångsammad tömning av magsäcken, vilket även kallas gastropares. Gastropares Gastrointestinal dysmotility is common, particularly in patients with diabetes mellitus. The aim of this thesis is to explore whether gastrointestinal dysmotility and endocrine secretion are interrelated, and how the symptoms manifest themselves in these patients. Patients with diabetes mellitus and gastrointestinal symptoms underwent gastric emptying scintigraphy, esophageal manometry and deep-

This article studies partner selection according to three dimensions: social origin, age, and place of birth. The authors use micro-level data from local population registers in five parishes in southern Sweden from 1815 to 1895.The results confirm that all three aspects were important but that socioeconomic status was the most important characteristic,structuring much of the selection process.The

Interest in cross-national partnership is increasing in Europe, a situation very much reflected in calls for funding. Multi-language qualitative research methodologies need to be strengthened in order to support this growing trend toward the promotion of cross-national collaboration. This practice analysis reports on our experience of carrying out cross-national and multi-language based qualitativ

We assessed potential toxicity of fungicides to natural bacterial communities from a constructed wetland, located in southern Sweden, and compared the sensitivity of two endpoints indicating bacterial activity, leucine incorporation, and potential denitrification, in detecting toxicity. The effects of eight fungicides (benomyl, carbendazim, carboxin, captan, cycloheximide, fenpropimorph, propicona

Auger spectra from the decay of core-ionized N-2 have been studied as a function of the exciting photon energy. Discrete features appear in the Auger spectrum when the photon energy is tuned to the shape-resonance region at 420 eV. The Auger spectra for two final dicationic states are studied; simulations of the contributions from the decay of the gerade and ungerade core-hole states are made base

The fragmentation of relativistic uranium projectiles has been exploited at the Gesellschaft für Schwerionenforschung laboratory to investigate the β decay of neutron-rich nuclei just beyond 208Pb. This paper reports on β-delayed γ decays of 211–213Tl, 215Pb, and 215–219Bi de-exciting states in the daughters 211–213Pb, 215Bi, and 215–219Po. The resulting partial level schemes, proposed with the he

The aim of this study was to conduct radiographic and histomorphometric analysis of bone healing in the calvaria of rabbits, using an autogenous graft associated with PRP obtained by 2 different methods. Thirty rabbits were divided into control and experimental groups. Lesions were produced in the calvaria and filled with autogenous graft ( control) or autogenous graft and PRP obtained by the Anit

Aim To describe gender difference in a total population of children with cerebral palsy (CP), related to subtype, gross and fine motor function, and to compare CP incidence trends in girls and boys. Methods All 590 children with CP born in southern Sweden 1990-2005 were included. CP subtype was classified according to the Surveillance of Cerebral Palsy in Europe, gross motor function according to

An amphiphilic ruthenium-based molecule (DOPURu) with potential antineoplastic activity has been synthesized, and its aggregation behavior in the presence of phospholipids has been investigated. A very rich variety of aggregates has been found, spanning from vesicles to cubic bicontinuous phases. Cubosomes here presented represent one of the first systems with potential use for medical therapy.

In high throughput applications, such as in multimedia, it is preferable to fully utilize computing resources, even at the price of some (bounded) delay. However, in real-time systems, where the maximum admissible delay is modeled by a deadline, most of the theory is developed with the assumption of a task deadline smaller than or equal to the task period. The reason of this limitation is in the i

New transference results for Fourier multiplier operators defined by regulated symbols are presented. We prove restriction and extension of multipliers between weighted Lebesgue spaces with two different weights, which belong to a class more general than periodic weights, and two different exponents of integrability that can be below one. We also develop some ad-hoc methods that apply to weights d

During recent years, Geographic Information Systems (GIS) as a powerful tool have had a tremendous impact on research techniques in the realm of geography and spatial analysis. The integrative ability of GIS to capture, store, manipulate, analyze, manage, and finally present all types of geographical spatial data, has drawn many attentions to it. Water Resources Engineering as a interdisciplinary