Peter Stanley Jørgensen

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In electrochemical devices such as fuel cells or batteries the microstructure is a determining factor for the performance of the device. To be able to optimize the microstructure it is important to be able to quantitatively measure key structural parameters, such that systematic studies can be made. We present several general methods for quantitative(More)
The Swedish micro-satellite Astrid-2 was successfully launched into a near polar orbit in December 1998. Despite the fact that its primary mission was the research of Auroral phenomena, the magnetic instrumentation has been designed to accomplish high resolution vector field magnetic measurements, and therefore mapping of the Earth's magnetic field is(More)
Routine use of quantitative three dimensional analysis of material microstructure by in particular, focused ion beam (FIB) serial sectioning is generally restricted by the time consuming task of manually delineating structures within each image slice or the quality of manual and automatic segmentation schemes. We present here a framework for performing(More)
The German geo-observations satellite CHAMP carries highly accurate vector instruments. The orientation of these relative to the inertial reference frame is obtained using star trackers. This Advanced Stellar Compass (ASC) is a fully autonomous unit, which provides, in real time, the absolute attitude with accuracy in the arc second range. In order to(More)
This thesis describes the methods used to construct a pipeline for the automatic and robust segmentation of adipose tissue in the abdominal region of human men. The segmentation is done into 3 classes: subcutaneous adipose tissue, visceral adipose tissue and other tissue. The MRI data is preprocessed to remove the field of non-uniformity in intensity levels(More)
This paper describes how the radiation impact from the passage of the radiation belt was planned mitigated for the Advanced Stellar Compass (ASC) [1], the star-tracker onboard the SMART-1 satellite. Since absolute pointing is essential when using an iondrive, the ASC was required to operate and deliver high accuracy attitudes throughout the thrust phase of(More)
An optimum method is proposed to prepare thin foil transmission electron microscopy (TEM) lamellae of multiphase porous functional ceramics: prefilling the pore space of these materials with an epoxy resin prior to focused ion beam milling. Several advantages of epoxy impregnation are demonstrated by successful preparation of TEM specimens that maintain the(More)
We present a method for supervised volumetric segmentation based on a dictionary of small cubes composed of pairs of intensity and label cubes. Intensity cubes are small image volumes where each voxel contains an image intensity. Label cubes are volumes with voxelwise probabilities for a given label. An unknown volume is segmented by cube-wise finding the(More)