Jesper Schou

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When working with multilook fully polarimetric synthetic aperture radar (SAR) data, an appropriate way of representing the backscattered signal consists of the so-called covariance matrix. For each pixel, this is a 3 3 Hermitian positive definite matrix that follows a complex Wishart distribution. Based on this distribution, a test statistic for equality of(More)
Finding the edges between different regions in an image is one of the fundamental steps of image analysis, and several edge detectors suitable for the special statistics of synthetic aperture radar (SAR) intensity images have previously been developed. In this paper, a new edge detector for polarimetric SAR images is presented using a newly developed test(More)
Tissue slices of rat ventral mesencephalon (VM), striatum, hippocampus and cerebellum were prepared from late fetal (E21) to 7 day old (P7) rats and cultured for 3 to 60 days by the roller tube technique before they were stained immunocytochemically for tyrosine hydroxylase (TH), a marker of dopaminergic (DA) neurons and fibres. The TH immunoreactive(More)
Filtering synthethic aperture radar (SAR) images ideally results in better estimates of the parameters characterizing the distributed targets in the images while preserving the structures of the nondistributed targets. However, these objectives are normally conflicting, often leading to a filtering approach favoring one of the objectives. An algorithm for(More)
OBJECTIVE Alterations of pancreatic β-cell cholesterol content may contribute to β-cell dysfunction. Two important determinants of intracellular cholesterol content are the ATP-binding cassette (ABC) transporters A1 (ABCA1) and -G1 (ABCG1). Whether genetic variation in ABCA1 and ABCG1 predicts risk of type 2 diabetes in the general population is unknown. (More)
This paper presents a series of helioseismic inversions aimed at determining with the highest possible conndence and accuracy the structure of the rotational shear layer (the tachocline) located beneath the base of the solar convective envelope. We are particularly interested in identifying features of the inversions that are robust properties of the data,(More)
Observations of the Sun with the LOWL instrument provide a homogeneous set of solar p-mode frequencies from low to intermediate degree which allows one to determine the structure of much of the solar interior avoiding systematic errors that are introduced when di erent data sets are combined, i.e., principally the e ects of solar cycle changes on the(More)
OBJECTIVES This study tested whether genetic variation in the CETP gene is consistent with a protective effect of cholesteryl ester transfer protein (CETP) inhibition on risk of ischemic events and on total mortality, without the adverse effects reported for torcetrapib. BACKGROUND Torcetrapib, an inhibitor of CETP, increased risk of death and ischemic(More)
OBJECTIVE ATP binding cassette transporter G1 (ABCG1) facilitates cholesterol efflux from macrophages to mature high-density lipoprotein particles. Whether genetic variation in ABCG1 affects risk of atherosclerosis in humans remains to be determined. METHODS AND RESULTS We resequenced the core promoter and coding regions of ABCG1 in 380 individuals from(More)
Helioseismic observations have detected small temporal variations of the rotation rate below the solar surface corresponding to the so-called ‘torsional oscillations’ known from Doppler measurements of the surface. These appear as bands of slower and faster than average rotation moving equatorward. Here we establish, using complementary helioseismic(More)