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Sökning: swepub > Konferensbidrag > Göteborgs universitet

  • Resultat 1-10 av 15217
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  • Thordstein, M., et al. (författare)
  • Effects of inflammation on cerebral electric activity in fetal sheep
  • 2008
  • Ingår i: 2nd Congress of the European Academy of Paediatrics, Nice 23-28 okt 2008.
  • Konferensbidrag (övrigt vetenskapligt)abstract
    • OBJECTIVEIntrauterine infections can by themselves induce fetal brain damage but also potentiate the effects of other harmful influences such as asphyxia and seizures. Using an EEG technique that permits the recording of extremely low frequencies, often called DC EEG, changes in the level, i.e. DC shifts can be detected. The DC level has been suggested to depend mainly on the potential over the blood brain barrier (BBB), in turn decided primarily by the arterial level of pCO2. Fetuses affected by infection/inflammation that produce detrimental effects on the brain, may have elevated levels of pCO2 and disturbance of the BBB. We aimed at investigating the possibility that the DC EEG could be used to detect the effects of inflammation on the fetal brain. METHODSFetal sheep were instrumented at 97 days of gestation with catheters, four active EEG electrodes placed on the dura mater as well as extracranial reference and ground electrodes. After three days of recovery, the bacterial endotoxin lipopolysaccharide (LPS) was given to the fetus (200 ng i.v.). RESULTSExposure to LPS induced a positive DC shift in parallel to the assumed affection of cerebral function and to the pCO2 elevation. This change was not always obvious in standard EEG. CONCLUSIONSThese recordings of fetal DC EEG appear to be the first to be done. They indicate that the effects of inflammation on cerebral function can be monitored by DC EEG. Such monitoring might be feasible also during late stages of labour and in neonates.
  • Larsson, Per-Olof, 1948- (författare)
  • Arbete för personer med intellektuella funktionshinder
  • 2009
  • Ingår i: Forskningspresentation för samordnare av verksamheter för personer intellektuella funktionsnedsättningar - samverkan mellan Arbetsförmedlingen, Socialtjänsten och Vuxenutbildningen i Göteborg 13 maj 2009 om "Arbetsgivarens motiv att anställa och arbetskamraternas motiv att integrera personer med intellektuellt funktionshinder på arbetsplatsen"..
  • Konferensbidrag (övrigt vetenskapligt)
  • Larsson, Per-Olof, 1948- (författare)
  • Arbete för personer med utvecklingsstörning
  • 2009
  • Ingår i: Forskningspresentation ”Unga med Funktionshinder” Arbetsförmedlingen, Socialtjänsten och Försäkringskassan i Göteborg Region Nordost 20 februari 2009 om "Arbetsgivarens motiv att anställa och arbetskamraternas motiv att integrera personer med intellektuellt funktionshinder på arbetsplatsen"..
  • Konferensbidrag (övrigt vetenskapligt)
  • Sou, Kin Cheong, et al. (författare)
  • Nonserial Dynamic Programming with Applications in Smart Home Appliances Scheduling - Part I : Precedence Graph Simplification
  • 2014
  • Ingår i: 2014 European Control Conference (ECC). - IEEE. - 978-3-9524269-1-3 ; s. 1643-1648
  • Konferensbidrag (refereegranskat)abstract
    • In this and a companion paper a dynamic programming (DP) approach to solve a smart home appliances scheduling problem is considered. The challenge with solving the scheduling problem is the coupling of decision variables due to some time precedence constraints. In general, the system of precedence constraints may contain redundant constraints that offer opportunities for simplification. This simplification is desirable for reducing the computation effort of the nonserial DP procedure presented in the companion paper (i.e., Part II). The current paper establishes the uniqueness of the maximum set of redundant constraints and its polynomial-time solvability with optimality guarantee, under the sufficient and necessary condition that the precedence graph (a graph representation of the precedence constraints system) does not contain any cycle with nonnegative weight. A numerical case study indicates the efficiency of the proposed simplification algorithm versus the brute-force enumerative search. Besides helping to reduce the computation effort in the DP procedure described in the companion paper, the algorithm in the current paper solves a generalization of a precedence graph simplification problem arising from application areas such as parallel computing.
  • Sarve, Hamid, 1981-, et al. (författare)
  • Registration of 2D Histological Images of Bone Implants with 3D SRμCT Volumes
  • 2008
  • Ingår i: Advances in Visual Computing : 4th International Symposium, ISVC 2008, Las Vegas, NV, USA, December 1-3, 2008. Proceedings, Part I. - Heidelberg/Berlin : Springer. - 978-3-540-89638-8 ; s. 1071-1080
  • Konferensbidrag (refereegranskat)abstract
    • To provide better insight in bone modeling and remodeling around implants, information is extracted using different imaging techniques. Two types of data used in this project are 2D histological images and 3D SRμCT (synchrotron radiation-based computed microtomography) volumes. To enable a direct comparison between the two modalities and to bypass the time consuming and difficult task of manual annotation of the volumes, registration of these data types is desired.In this paper, we present two 2D-3D intermodal rigid-body registration methods for the mentioned purpose. One approach is based on Simulated Annealing (SA) while the other uses Chamfer Matching (CM). Both methods use Normalized Mutual Information for measuring the correspondence between an extracted 2D-slice from the volume and the 2D histological image whereas the latter approach also takes the edge distance into account for matching the implant boundary. To speed up the process, part of the computations are done on the Graphic Processing Unit.The results show that the CM-approach provides a more reliable registration than the SA-approach. The registered slices with the CM-approach correspond visually well to the histological sections, except for cases where the implant has been damaged.
  • Löfhede, J., et al. (författare)
  • Detection of Bursts in the EEG of Post Asphyctic Newborns
  • 2006
  • Ingår i: 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. - 1557-170X. ; s. 2179-2182
  • Konferensbidrag (refereegranskat)abstract
    • Eight features inherent in the electroencephalogram (EEG) have been extracted and evaluated with respect to their ability to distinguish bursts from suppression in burst-suppression EEG. The study is based on EEG from six full term infants who had suffered from lack of oxygen during birth. The features were used as input in a neural network, which was trained on reference data segmented by an experienced electroencephalographer. The performance was then evaluated on validation data for each feature separately and in combinations. The results show that there are significant variations in the type of activity found in burst-suppression EEG from different subjects, and that while one or a few features seem to be sufficient for most patients in this group, some cases require specific combinations of features for good detection to be possible.
  • Backlund, Andreas, 1978-, et al. (författare)
  • Management Control of health - the Swedish example
  • 2007
  • Ingår i: 13th Annual International Sustainable Development Research Conference, Mälardalen University, Sweden.
  • Konferensbidrag (refereegranskat)
  • Lindblad, Sverker, et al. (författare)
  • Classroom Interaction in Changing Contexts: Positions and Practices Performed in Recordings from 1960s into 2000s.
  • 2011
  • Ingår i: AERA 2011 meeting program: Inciting the Social Imagination. - 0163-9676.
  • Konferensbidrag (refereegranskat)abstract
    • At the core of education as institutionalized pedagogical practices is classroom interaction. Here we find sites for teaching and learning activities, the making of lived curricula as well displays of social and cultural asymmetries. Given this it is not surprising that a set of research paradigms and research controversies are presented in education research – as presented by e.g. Bellack (1978), Mehan (1979), Macbeth (2003), Gee (2004), or Lindblad & Sahlström (2002). In this paper we go into studies of classroom interaction with a micro-ethnographic stance using video- and audio recordings of teaching processes in different contexts spanning over a period of forty years. We are using this time span in order to discuss ways of describing and analysing pedagogical processes, where notions of context is vital. Our point of departure is based on curriculum theorizing using a Bernstein (e.g. 2000) approach based on relations between curriculum, pedagogy and evaluation. Given this, we put the pedagogical practices into social contexts (such as framing and classification). This does not mean that classroom practices are instantiations of “a higher order” but rather that these practices are matters of institutional work permeated by social facts. Here, we are eclectic: we use the seminal work of Mehan (1979) to describe classroom interaction with a basis in IRE-sequences (Initiation-Reply-Evaluation) as characteristic in the language of schooling. With this as a basis we describe and compare classroom interaction in different contexts. This is regarded as a way to describe aspects of pedagogy in a Bernsteinian meaning and to analyze change in classroom interaction.
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