Publications by authors named "A J Nigl"

The nature of ultrahigh-energy cosmic rays (UHECRs) at energies >10(20) eV remains a mystery. They are likely to be of extragalactic origin, but should be absorbed within approximately 50 Mpc through interactions with the cosmic microwave background. As there are no sufficiently powerful accelerators within this distance from the Galaxy, explanations for UHECRs range from unusual astrophysical sources to exotic string physics.

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Although increased numbers of psychogeriatric patients have been placed in proprietary nursing homes in recent years, many facilities have not been able to accommodate the behavioral problems involved. This study summarizes the results of a behavior management program for improving the social functioning and social behaviors of 6 psychogeriatric patients in a nursing home. The use of reinforcement by tokens substantially improved social behavior over a 10-day period; during a 10-day withdrawal of reinforcement, the level dropped precipitantly; but during the subsequent 10-day reinforcement period, substantial improvement in social functioning again was observed.

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The effectiveness of electromyograph (EMG) biofeedback training was studied among 2 groups of psychiatric patients, and a control group of normal subjects. Both the psychiatric patients and the normal subjects received 6 sessions of training in deep muscle relaxation and biofeedback. The schizophrenic and psychoneurotic patients had significantly lower ratings for pathological symptomatology and abnormal behavior and all groups significantly reduced their level of muscle tension following the treatment; the schizophrenics and normals displayed significantly greater reductions than the psychoneurotic patients.

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