X amateur who builds a radio trans­ mitter is likely to measure his success and pleasure in terms of the transmission range he achieves. In such terms there is more pleasure in talking with another "ham" across the country than with one in the next coun­ ty, even if the more distant operator turns out to be a rather dull fellow. The aim of reaching out ever farther has spurred amateur radio ope...

OBJECTIVES To determine the frequency and severity of injuries that affect amateur runners. METHODS This study was conducted by means of a questionnaire applied to 204 amateur runners. Individuals who were under the age of 18 years and those who were unpracticed runners were excluded. The data gathered comprised the number, type, site and degree of severity of the injuries and the individuals...

Despite worldwide popularity of amateur boxing, research focussed on the physiological demands of the sport is limited. The physiological profile of Senior and Junior England international amateur boxers is presented. A gradual (8 to 21-days) and rapid (0 to 7-days) phase of body weight reduction was evident with 2.2 ± 0.3 % of the 7.0 ± 0. 8 % weight loss occurring over the final 24-hours. An ...

This paper describes an experimental new link layer protocol for amateur packet radio use. It extends my earlier MACA scheme for dealing with hidden terminals by incorporating a powerful forward error correction (FEC) scheme: convolutional coding with sequential decoding. The resulting hybrid protocol combines the best of the FEC and retransmission (ARQ) techniques. It should perform very well ...