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R Gregor

Publications and source records attributed to R Gregor.

7 recordsLinked to original sources
PubMed2005

Observation of in-medium modifications of the omega meson.

The photoproduction of omega mesons on nuclei has been investigated using the Crystal Barrel/TAPS experiment at the ELSA tagged photon facility in Bonn. The aim is to study possible in-medium modifications of the omega meson via the reaction gamma + A --> omega + X --> pi(0)gamma + X('). Results obtained for Nb are compared to a reference measurement on a LH2 target. While for recoiling, long-lived mesons (pi(0), eta, and eta;(')), which decay outside of the nucleus, a difference in the line shape for the two data samples is not observed, we find a significant enhancement towards lower masses for omega mesons produced on the Nb target. For momenta less than 500 MeV/c an in-medium omega meson mass of M(medium) = [722(+4)(-4)(stat)+35-5(syst)] MeV/c(2) has been deduced at an estimated average nuclear density of 0.6rho(0).

Journal Article↗
PubMed1990

[Psychiatric rehabilitation from the viewpoint of a large psychiatric facility].

The paper makes the reader familiar with the results of activities of the central rehabilitation department in the Psychiatric Sanatorium in Kromĕríz. It postulates views regarding the technique of work with patients and pays special attention to the rehabilitation of patients with schizophrenic psychosis. In these patients the results of rehabilitation care at different rating levels were evaluated. In the field of ergotherapy the schizophrenic patients were evaluated by the therapists and instructors of occupational therapy on entry of and departure from the workshop or class, using the Engelsman--Hájek scale. Based on the results the hypothesis was confirmed of a lower working performance of patients with schizophrenic psychosis, as compared with other diagnostic groups. In the field of remedial exercise and special forms of psychiatric rehabilitation, such as educational and recreational activities, patients with schizophrenic psychosis were evaluated by a doctor and psychologist of the rehabilitation department of the psychiatric sanatorium for after--treatment of psychoses. The patients were evaluated by Wing's scale for chronic schizophrenia and by means of the Scale for Evaluation of Working Performance and Behaviour. According to the results of both scales no significant differences were found between the experimental groups where different forms of rehabilitation were accentuated, as compared with the control group engaged only in occupational therapy. Both scales revealed in both experimental groups highly significant improvement as regards resocialization within a very short period during which the patients were subjected to intense rehabilitation. Based on these results the author recommends further rehabilitation provisions.

Hospitals, Psychiatric↗