377 research outputs found
The Participation of Junior High School Boys in Competitive Athletics
The problem of this study was to gather information concerning interschool athletics. The chief purposes of this study were to: (1) Collect and summarize the literature written by the medical profession; (2) Collect and summarize the literature written by the educational profession; and (3) To present the research written by those involved, so that people concerned with the problem might make a better judgement on the advisability of interschool athletics at the junior high level
Spin correlations and Dzyaloshinskii-Moriya interaction in CsCuCl
We report on electron spin resonance (ESR) studies of the spin relaxation in
CsCuCl. The main source of the ESR linewidth at temperatures K is attributed to the uniform Dzyaloshinskii-Moriya interaction. The
vector components of the Dzyaloshinskii-Moriya interaction are determined from
the angular dependence of the ESR spectra using a high-temperature
approximation. Both the angular and temperature dependence of the ESR linewidth
have been analyzed using a self-consistent quantum-mechanical approach. In
addition analytical expressions based on a quasi-classical picture for spin
fluctuations are derived, which show good agreement with the quantum-approach
for temperatures K. A small modulation of the
ESR linewidth observed in the -plane is attributed to the anisotropic
Zeeman interaction, which reflects the two magnetically nonequivalent Cu
positions
A 15-year-old girl with a large pericardial effusion
Pericarditis is a rare manifestation of tuberculosis and can be fatal. We describe a 15-year-old girl admitted for a large pericardial effusion. Subxiphoid pericardial biopsy was performed. Biopsy samples were positive for M. tuberculosis DNA by PCR, which confirmed the diagnosis of tuberculous pericarditis
Collectieve versus individuele contracten voor natuurbeheer
In dit onderzoek staat de vraag centraal of collectieve contracten in vergelijking met individuele contracten efficiënter zijn en/of een grotere ecologische effectiviteit hebben. Daarbij is bijzondere aandacht gegeven aan de rol die agrarische natuurverenigingen kunnen spele
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