We present a detailed experimental and theoretical analysis of the dispersion and nonlinear Kerr frequency shifts of plasma modes in a one-dimensional Josephson junction chain containing 500 ...superconducting quantum interfence devices in the regime of weak nonlinearity. The measured low-power dispersion curve agrees perfectly with the theoretical model if we take into account the Kerr renormalization of the bare frequencies and the long-range nature of the island charge screening by a remote ground plane. We measured the self- and cross-Kerr shifts for the frequencies of the eight lowest modes in the chain. We compare the measured Kerr coefficients with theory and find good agreement.
We present a measurement of the longitudinal spin asymmetry A_|| in photoproduction of pairs of hadrons with high transverse momentum p_T. Data were accumulated by the HERMES experiment using a 27.5 ...GeV polarized positron beam and a polarized hydrogen target internal to the HERA storage ring. For h+h- pairs with p_T^h_1 > 1.5 GeV/c and p_T^h_2 > 1.0 GeV/c, the measured asymmetry is A_|| = -0.28 +/- 0.12 (stat.) +/- 0.02 (syst.). This negative value is in contrast to the positive asymmetries typically measured in deep inelastic scattering from protons, and is interpreted to arise from a positive gluon polarization.
In situ and in vivo treatment plan verification and beam monitoring as well as dose control during heavy-ion tumour therapy can be performed in principle by measurements of range distributions of ...beta(+)-emitting nuclei by means of PET techniques. For this purpose the performance of different types of positron camera as well as the results of in-beam PET experiments using beams of beta(+)-active heavy ions (15O, 17F and 19Ne with energies of 300-500 A MeV) are presented. Following the deduced performance requirements a PET scanner that is designed for clinical use in experimental heavy-ion therapy at GSI Darmstadt has been built. This limited angle tomograph consists of two large-area detector heads based on position sensitive BGO detectors and is predicted to perform the measurement of the end point of a beta(+)-emitting ion beam for the verification of a treatment plan with a precision better than 1 mm. The maximum dose applied in the patient thereby is of the magnitude of 10 mGy.
Background:
We have set up a pilot study to address the value of different screening methods to predict toxicity, function and disability in older breast cancer patients.
Methods:
82 consecutive ...patients over the age of 65, suffering from breast cancer were included. Patients were assessed before treatment and 2–3 months after radiotherapy or chemotherapy was finished. Different geriatric assessment tools were used to determine functional status and the activities of the daily life (ADLs). Cognitive status, comorbidity and others were measured. Endpoints were toxicity, disability and the quality of life.
Results:
Mean age was 70.8 years (65–86 years). Tumor-stage were mostly T1 or T2 (94%), 15% were hormone-receptor negative, 21% were HER2neu negative, 75% were lymph-node negative and none of them had distant filiae at the time of diagnosis. When comparing patients 75 years and older (n=17) with those between 65 and 75 years (n=65), frequency and dosage of radiotherapy and chemotherapy as well as tumor characteristics were equally distributed. Functional assessments revealed more deficits in the older age group. However, the functional and the activity measures increased in the older people more as compared to a decrease in the younger age group after the treatment. This could not be explained by comorbidity or the number of medications in the bivariate analysis. The EORTC (European organisation for research and treatment of cancer) function and symptom scales performed better than the other scales. Further analyses will be presented at the conference.
Conclusion:
The assessment of ADL-type physical functions seems to be a good predictive parameter for toxicity and disability of the older breast cancer patients.
We present a detailed experimental and theoretical analysis of the dispersion and non-linear Kerr frequency shifts of plasma modes in a one-dimensional Josephson junction chain containing 500 SQUIDs ...in the regime of weak nonlinearity. The measured low-power dispersion curve agrees perfectly with the theoretical model if we take into account the Kerr renormalisation of the bare frequencies and the long-range nature of the island charge screening by a remote ground plane. We measured the self- and cross-Kerr shifts for the frequencies of the eight lowest modes in the chain. We compare the measured Kerr coefficients with theory and find good agreement.
This article reviews our present understanding of QCD spin physics: the proton spin puzzle and new developments aimed at understanding the transverse structure of the nucleon. We discuss present ...experimental investigations of the nucleon's internal spin structure, the theoretical interpretation of the different measurements and the open questions and challenges for future investigation.
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