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Search Results: 1 - 10 of 1849 matches for " Ove Christensen "
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Incomplete Continuous-time Securities Markets with Stochastic Income Volatility
Peter Ove Christensen,Kasper Larsen
Quantitative Finance , 2010,
Abstract: In an incomplete continuous-time securities market with uncertainty generated by Brownian motions, we derive closed-form solutions for the equilibrium interest rate and market price of risk processes. The economy has a finite number of heterogeneous exponential utility investors, who receive partially unspanned income and can trade continuously on a finite time-interval in a money market account and a single risky security. Besides establishing the existence of an equilibrium, our main result shows that if the investors' unspanned income has stochastic countercyclical volatility, the resulting equilibrium can display both lower interest rates and higher risk premia compared to the Pareto efficient equilibrium in an otherwise identical complete market.
Tema 2: Design-Based Research – introduktion til en forskningsmetode i udvikling af nye E-l ringskoncepter og didaktisk design medieret af digitale teknologier
Ove Christensen,Karsten Gynther,Trine Brun Petersen
L?ring og Medier , 2012,
Abstract: I denne artikel introduceres Design Based Research for f rste gang p dansk i et videnskabeligt tidsskrift. Artiklen pr senterer de grundl ggende antagelser, som ligger til grund for Design Based Research-traditionen, og artiklen diskuterer de principper, som ligger til grund for gennemf relse af et DBR-forskningsprojekt. Med udgangspunkt i forsknings- og udviklingsprojektet ELYK: E-l ring, Yderomr der og Klyngedannelse, pr senteres den innovationsmodel, som projektet har udviklet med udgangspunkt i Design Based Research traditionen. ELYKs DBR innovationsmodel har vist sig effektiv i forhold til projektfremdrift, brugerinvolvering og vidensgenerering, og den vil kunne inspirere andre med interesse i forskningsbaseret udvikling af didaktisk design, der er medieret af digitale teknologier.
Tema 2: Den digitale patientmappe – et redskab til forbedret didaktisk kommunikation i den privatpraktiserende fysioterapi Den digitale patientmappe – et redskab til forbedret didaktisk kommunikation i den privatpraktiserende fysioterapi
Ove Christensen,Karsten Gynther,Trine Brun Petersen
L?ring og Medier , 2012,
Abstract: I denne artikel beskrives konceptet ’Den digitale patientmappe’, som er udviklet som en del af ELYK projektet – E-l ring, Yderkanter og Klyngedannelse. Den digitale patientmappe er resultatet af et co-designforl b mellem privatpraktiserende fysioterapeuter og medarbejdere i ELYK, der har udm ntet sig i et v rkt j, der muligg r et t t kommunikativt samarbejde mellem fysioterapeut og patient. Registreringer, diagnose samt instruktioner samles digitalt ved hj lp af tekst, billede, lyd og video og g res tilg ngeligt for patient og terapeut i alle relevante situationer. Den digitale patientmappe kan ses som en udvidelse af patientjournalen med den forskel, at patientmappen er patientens, og at den indg r i et mere ligev rdigt samarbejdsforhold mellem patient og terapeut.
Molecular Profiling of the Lateral Habenula in a Rat Model of Depression
Trine Christensen, Line Jensen, Elena V. Bouzinova, Ove Wiborg
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0080666
Abstract: Objective This study systematically investigated the effect of chronic mild stress and response to antidepressant treatment in the lateral habenula at the whole genome level. Methods Rat whole genome expression chips (Affymetrix) were used to detect gene expression regulations in the lateral habenula of rats subjected to chronic mild stress (mild stressors exchanged twice a day for 8 weeks). Some rats received antidepressant treatment during fifth to eights week of CMS. The lateral habenula gene expression profile was studied through the gene ontology and signal pathway analyses using bioinformatics. Real-time quantitative polymerase chain reaction (RT-PCR) was used to verify the microarray results and determine the expression of the Fcrla, Eif3k, Sec3l1, Ubr5, Abca8a, Ankrd49, Cyp2j10, Frs3, Syn2, and Znf503 genes in the lateral habenula tissue. Results In particular we found that stress and antidepressant treatment affected intracellular cascades like growth factor receptor signaling, G-protein-coupled receptor signaling, and Wnt signaling – processes involved in the neuroplastic changes observed during the progression of depression and antidepressant treatment. Conclusion The present study suggests an important role of the lateral habenula in the development of depression-like conditions and correlates to previous studies demonstrating a significant role of the lateral habenula in depressive-like conditions and antidepressant treatment.
Avslutande kommentarer kring projektet "Omv rlden och skolan"
Ove Sernhede
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2010,
Territoriell stigmatisering, ungas informella l rande och skolan i det postindustriella samh llet
Ove Sernhede
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2009,
Estimation in adults of the glomerular filtration rate in [99mTc]-DTPA renography - the rate constant method.
Carlsen, Ove
Alasbimn Journal , 2004,
Abstract: The purpose of this study was to design an alternative and robust method for estimation of glomerular filtration rate (GFR) in [99mTc]-diethylenetriaminepentaacetic acid ([99mTc] -DTPA renography with a reliability not significantly lower than that of the conventional Gates' method.Methods: The method is based on renographies lasting 40 min in which regions of interest (ROIs) are manually created over selected parts of certain blood pools (e.g. heart, lungs, spleen, and liver). For each ROI the corresponding time-activity curve (TAC) was generated, decay corrected and exposed to a monoexponential fit in the time interval 10 to 40 min postinjection. The rate constant in min-1 of the monoexponential fit was denoted BETA. Following an iterative procedure comprising usually 5-10 manually created ROIs, the monoexponential fit with the maximum rate constant (BETAmax) was used for estimation of GFR.Results: In a patient material of 54 adult subjects in whom GFR was determined with multiple or one sample techniques with [51Cr]-ethylenediaminetetraacetic acid ([51Cr]-EDTA) the regression curve of standard GFR (GFRstd) (i.e. GFR adjusted to 1.73 m2 body surface area) showed a close, non-linear relationship with BETAmax with a correlation coefficient of 95%. The standard errors of estimate (SEE) were 6.6, 10.6 and 16.8 for GFRstd equal to 30, 60, and 120 ml/(min·1.73 m2), respectively. The corresponding SEE values for almost the same patient material using Gates' method were 8.4, 11.9, and 16.8 ml/(min·1.73 m2).Conclusions: The alternative rate constant method yields estimates of GFRstd with SEE values equal to or slightly smaller than in Gates' method. The two methods provide statistically uncorrelated estimates of GFRstd. Therefore, pooled estimates of GFRstd can be calculated with SEE values approximately 1.41 times smaller than those mentioned above. The reliabilities of the pooled estimate of GFRstd separately and of the multiple samples method are of the same magnitude. Therefore, [99mTc]-DTPA renography could replace the multiple samples method for GFR determination. In addition, the renography requires fewer resources from patient and staff and offers more clinical results as regards renal uptake function and renal outflow.
Alternative Processing of Renographic Data for Use in Children and Agitated Adult Patients.
Carlsen, Ove
Alasbimn Journal , 2002,
Abstract: The purpose of this study was to describe an alternative method for processing [99mTc]-diethylene-triamine pentaacetate ([99mTc]-DTPA) renographic data which is unaffected by patient movement and which only requires the patient to be on the imaging table during the early and late examination phases.Methods: The analysis is based on early image series (0-2 min postinjection) and late image series (the last 5 min). Regions of interest (ROIs) over the kidneys, renal parenchyma and renal backgrounds were created in both sets of images. A robust method for determination without deconvolution of mean transit time indices for the whole kidney and renal parenchyma was established. Estimation of renal volume was possible using a geometrical method.Results: Simulation studies and studies in patients showed a close relationship between the mean transit times using deconvolution and the corresponding mean transit time indices.Conclusions: The alternative method is recommended to be applied in those agitated patients, children in particular, where sedation is either contraindicated or not relevant and in cases where the effective acquisition time should be kept at a minimum.
Praktikbaserad utv rdering i f rskola och fritidshem
Ove Karlsson
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2000,
Justifications of Educational Reforms in Norway (ca 1965-1995)
International Online Journal of Educational Sciences , 2010,
Abstract: In the era of neo-liberalism, Western societies have gone through a process of implementing New Public Management as the main instrument for governance. Also the educational sector is influenced by this change in ideology and practice. At the same time, western society have witnessed a new form of individualisation. In the educational system this is translated into pupil-centred learning. We catch eye of the establishment of a culture with new institutional arrangements that simultaneously seek justification by referring to market and competition and by referring to individual authenticity and individual self-realisation. This article put forward an analysis of how justifications of educational reforms in Norway changed from beginning of the 1960s to the 1990s. I will discuss sociologically the historical process by which the compromise between market liberalism and romantic individualism was designed and given legitimacy.
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