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We have measured the nuclear transparency of the fundamental process gamman-->pi(-)p in He-4. These measurements were performed at Jefferson Lab in the photon energy range of 1.6-4.5 GeV and at theta(cm)(pi)=70degrees and 90degrees. These measurements are the first of their kind in the study of nuclear transparency in photoreactions. They also provide a benchmark test of Glauber calculations based
Recension av Stefan Bohman, Historia, museer och nationalism.
Popular Abstract in Swedish Att förebygga våld och hantera konflikter konstruktivt: En studie i fredsundervisning i årskurs 4–6.The objectives of the study were (1) to contribute to development of a theoretical basis for teaching violence prevention and conflict resolution, connecting the micro (interpersonal and intergroup) and macro (national, international and transnational) levels; and (2) to contribute to development of teaching methods with the aim of giving children skills in handling conflicts constructively. The
This paper presents a post processing strategy for myocardial velocity fields obtained by phase contrast magnetic resonance imaging. Such data can be used to track cardiac motion and to calculate strain. The method combines data regularization with optical flow estimation to overcome the partial volume effect in the image acquisition. Validation is performed both in vitro and in vivo and it is sho
Purpose. To evaluate treatment outcome with Zygoma fixtures (Nobel Biocare, Goteborg, Sweden) with regard to fixture survival, patient satisfaction, and function of prosthesis replacement. Materials and Methods: The treatment outcome of 76 patients treated with 145 Zygoma fixtures at 16 centers was evaluated. Patient's and dentist's evaluations of the functional and aesthetic outcome of the treatm
A group of Swedish radiation oncologists and hospital physicists have estimated the number of patients in Sweden suitable for proton beam therapy in a facility where one of the principal aims is to facilitate randomized and other studies in which the advantage of protons can be shown and the magnitude of the differences compared with optimally administered conventional radiation treatment, also in
Thymidine kinase (TK) is the key enzyme in salvaging thymidine to produce thymidine monophosphate. Owing to its ability to phosphorylate nucleoside analogue prodrugs, TK has gained attention as a rate-limiting drug activator. We describe the structures of two bacterial TKs, one from the pathogen Bacillus anthracis in complex with the substrate dT, and the second from the food-poison-associated Bac
Planar gamma-scintigraphy is often used to quantify pulmonary deposition patterns from aerosol inhalers. The results are quite different from those obtained using 3-dimensional PET and SPECT. The purpose of this study was to characterize the effects of scatter and tissue attenuation on the distribution of radiolabeled aerosol as measured by planar scintigraphy using Monte Carlo simulations. This s
A series of Ti-doped diopside samples synthesized by fluxgrowth methods under reducing conditions were investigated by microanalytical methods and optical absorption spectroscopy, to assess Ti incorporation mechanisms, valence states, and related electronic transitions. Chemical characterization show that Ti occurs both in the tri-and tetravalent states, with Ti4+ preferentially ordered to the tet
The association between humoral immunity to unique and conserved epitopes of the Chlamydia trachomatis 60-kDa heat-shock protein (hsp60) and immunity to human hsp60 was examined in 129 women with laparoscopically verified pelvic inflammatory disease. An ELISA was used to detect antichlamydial IgG and IgA antibodies, IgG antibodies to recombinant human hsp60, and antibodies to two synthetic peptide
A theorem on duality between cost functions and density functions in optimal control is derived using the Hahn-Banach theorem. The result puts focus on convexity aspects in control synthesis and the theory of almost global stability. In particular, it gives a new proof that existence of a density function is both necessary and sufficient for almost global stability in a nonlinear system.
Until recently there was no information available on the prevalence of atopic dermatitis in Greenland. Our objective was to determine the prevalence of atopic dermatitis in younger schoolchildren in Greenland. In the autumn of 2000 we used our previously elaborated questionnaire in a cross-sectional study of 954 schoolchildren aged 7 - 8 years, who lived in five Greenlandic towns. The findings wer
There are those who advocate nonoperative treatment of impacted femoral neck fractures, but in general there is consensus that surgery is the treatment of choice for both trochanteric hip fracture and femoral neck fracture. As for trochanteric fractures, modern results after internal fixation are characterized by only a low percentage of secondary operations, even for unstable fractures and when f
The overall aim of this thesis was to describe changes in the prevalence and severity of periodontal diseases and to identify risk factors for severe periodontal disease in adults living in Jönköping County, Sweden, by analysing the cross-sectional, epidemiological studies that had been carried out in the city of Jönköping in 1973, 1983, and 1993. Individuals were randomly selected from the follow
We examined herbivore-induced responses of alfalfa (Medicago sativa) and cotton (Gossypium hirsutum) under different CO2 conditions. Plants were grown under ambient (350 ppm) or elevated (700 ppm) CO2 levels, and were either damaged or undamaged by Spodoptera littoralis larvae. At harvest, growth of undamaged (control) plants was determined, and foliar chemical composition of both undamaged and da
The eating quality of M. longissimus dorsi (LD) from RN- homozygotes, RN- heterozygotes and RN- non-carriers was investigated in a Swedish Hampshire x Finnish Landrace pig population. The recently identified new allele (V1991, here denoted rn*) at the RN locus was also detected among the pigs selected and included in the sensory evaluation. The number of animals varied from 10 to 15 in the five ge
Rapporten innehåller en beskrivning av material, undersökningsmetoder, resultat och kommentarer från laboratorieundersökningar. För att erhålla olika typer av luftporsystem användes luftporbildande medel av olika typ och i olika mängder.
This work is the result of a course project in Embedded Systems. The goal was to implement a whee-slip control system on a LEGO car using a microcontroller. The car allows front-wheel or back-wheel driven configuration. Experimental results are presented for dry and wet surfaces.
BACKGROUND AND PURPOSE: To determine how a recently proposed clinical stroke subclassification corresponds to specific findings on computed tomography (CT) and magnetic resonance imaging (MRI) of the brain. METHODS: Two hundred twenty-eight patients with first-ever stroke were divided into four clinical subgroups: (1) total anterior circulation syndrome: both cortical and subcortical symptoms from
