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3-D Monte Carlo-based scatter compensation in quantitative I-131SPECT reconstruction
We have implemented highly accurate Monte Carlo based scatter modeling (MCS) with 3-D ordered subsets expectation maximization (OSEM) reconstruction for I-131 single photon emission computed tomography (SPECT). The scatter is included in the statistical model as an additive term and attenuation and detector response are included in the forward/backprojector. In the present implementation of MCS, a
The delimitation of the genus Tuckermannopsis Gyeln. (Parmeliaceae, lichenized Ascomycetes) based on morphology and DNA sequences.
Abstract is not available
Crank Angle Resolved HC Detection Using LIF in the Exhausts of Small Two-Stroke Engines Running at High Engine Speed
In order to separate the HC-emissions from two-stroke engines into short-circuit losses and emissions due to incomplete combustion, Laser Induced Fluorescence (LIF) measurements were performed on the exhaust gases just outside the exhaust ports of two engines of different designs. The difference between the two engines was the design of the transfer channels. One engine had "finger" transfer chan
Systematic Studies of N IV Transitions of Astrophysical Importance
E1, M2, M1 and E2 rates of transitions between n = 2 levels of N IV have been calculated using the tw independent codes CIV3 and MCHF. Convergence of each of the approaches has been studied and comparisons made as the complexity of the calculations increases to include valence, core-valence and core-core correlation. The agreement between the two methods is sufficiently good to allow us to set qui
Modellbygge med simuleringar på värmepumpsanläggning i Skurup : Projektarbete i systemteknik våren 1981
Classification of traveling waves for a class of nonlinear wave equations
We classify the weak traveling wave solutions for a class of one-dimensional non-linear shallow water wave models. The equations are shown to admit smooth, peaked, and cusped solutions, as well as more exotic waves such as stumpons and composite waves. We also explain how some previously studied traveling wave solutions of the models fit into this classification.
Return Migration at the End of Working Life. Immigrants Leaving Sweden in the Period 1979-1996
Minimum Risk Control
[abstract missing]
Farvatten och blindskär i barnhabiliteringen. Examinationspaper från en påbyggnadsutbildning
Rapporten bygger på examinationspaper från en påbyggnadsutbildning för 29 praktiker inom Barn- och ungdomshabiliteringen i Sverige, som genomfördes under 2001–2002 av en nationell arbetsgrupp från aktörer inom barnhabiliteringsfältet. Som examination på kursen skrev deltagarna en reflektion över en aspekt av sin praktiska vardag, där denna problematiserades i termer av sin relationella, sociala, o
Differential regulation of beta-defensin expression in human skin by microbial stimuli
In response to infection, epithelia mount an innate immune response that includes the production of antimicrobial peptides. However, the pathways that connect infection and inflammation with the induction of antimicrobial peptides in epithelia are not understood. We analyzed the molecular links between infection and the expression of three antimicrobial peptides of the beta-defensin family, human
BEAST decoding for block codes
BEAST is a Bidirectional Efficient Algorithm for Searching code Trees. In this paper, it is used for decoding block codes over a binary-input memoryless channel. If no constraints are imposed on the decoding complexity (in terms of the number of visited nodes during the search), BEAST performs maximum-likelihood (ML) decoding. At the cost of a negligible performance degradation, BEAST can be const
Optimisation strategies in medical X-ray imaging
Novel azapeptide inhibitors of cathepsins B and K. Structural background to increased specificity for cathepsin B
We have designed and synthesized a new series of azapeptides which act as potential inhibitors of cathepsin B and/or cathepsin K. Their structures are based upon the inhibitory sites of natural cysteine protease inhibitors, cystatins. For the synthesized azapeptides, the equilibrium constants for dissociation of inhibitor-enzyme complex, K-i, were determined. Comparison of these values indicated t
A new nested polymerase chain reaction method very efficient in detecting Plasmodium and Haemoproteus infections from avian blood
Recently, several polymerase chain reaction (PCR)-based methods for detection and genetic identification of haemosporidian parasites in avian blood have been developed. Most of these have considerably higher sensitivity compared with traditional microscope-based examinations of blood smears. These new methods have already had a strong impact on several aspects of research on avian blood parasites.