Operator and organizational maintenance manual, including repair parts and special tools lists : voice-frequency telegraph equipment as used in radio terminal sets AN/TRC-90, AN/TRC-90A, AN/TRC-90B, AN/TRC-129, and AN/TRC-129A.

"August 1968."

Operator's and organizational maintenance manual including repair parts and special tools lists : simulator, radio frequency SM-442A/GRC.

"August 1967."

Operator, organizational, DS, GS, and depot maintenance manual (including repair parts and special tool lists) : radio frequency power test set TS-2609/U.

"May 1968."

Organizational maintenance, second echelon : frequency shift converter CV-278/GR.

"May 1959."

Frequency meter AN/URM-80.

"October 1955."

Frequency meter AN/URM-32.

Includes index.

Direct support, general support, and depot maintenance manual including repair parts and special tools lists : control, frequency selector C-2742/VRC and control, radio set C-2299/VRC.

"April 1973."

Operator's and organizational maintenance manual : amplifier, radio frequency AM-1881/U.

"28 July 1960."

Direct support and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for converters, frequency, electronic, CV-3084/MSC-46(V) (NSN 5895-00-100-4314) and CV-3084A/MSC-46(V) (NSN 5895-00-614-9593).

Includes index.

Operators, organizational, direct support, and general support maintenance manual : frequency standard TS-65C/FMQ-1 and TS-65D/FMQ-1, (NSN 6625-00-649-4279).

"October 1973."

DS, GS, and depot maintenance manual : frequency comparator CM-77A/USM.

"September 1964."

Operator and organizational maintenance manual : test set, radio frequency power AN/USM-161.

"15 May 1962."

Operator's and organizational maintenance manual including repair parts and special tools list : test set, radio frequency AN/GRM-62.

"October 1967."

Experimental muscle pain changes feedforward postural responses of the trunk muscles

Many studies have identified changes in trunk muscle recruitment in clinical low back pain (LBP). However, due to the heterogeneity of the LBP population these changes have been variable and it has been impossible to identify a cause-effect relationship. Several studies have identified a consistent change in the feed-forward postural response of transversus abdominis (TrA), the deepest abdominal muscle, in association with arm movements in chronic LBP. This study aimed to determine whether the feedforward recruitment of the trunk muscles in a postural task could be altered by acute experimentally induced LBP. Electromyographic (EMG) recordings of the abdominal and paraspinal muscles were made during arm movements in a control trial, following the injection of isotonic (non-painful) and hypertonic (painful) saline into the longissimus muscle at L4, and during a 1-h follow-up. Movements included rapid arm flexion in response to a light and repetitive arm flexion-extension. Temporal and spatial EMG parameters were measured. The onset and amplitude of EMG of most muscles was changed in a variable manner during the period of experimentally induced pain. However, across movement trials and subjects the activation of TrA was consistently reduced in amplitude or delayed. Analyses in the time and frequency domain were used to confirm these findings. The results suggest that acute experimentally induced pain may affect feedforward postural activity of the trunk muscles. Although the response was variable, pain produced differential changes in the motor control of the trunk muscles, with consistent impairment of TrA activity.

Seasonal changes in the diel surfacing behaviour of the bimodally respiring turtle Rheodytes leukops

The purpose of this study was to determine whether a relationship existed between the diel surfacing trends of the bimodally respiring freshwater turtle Rheodytes leukops and daily fluctuations in specific biotic and abiotic factors: The, diel surfacing behaviour of adult R. leukops was recorded over four consecutive seasons (Austral autumn 2000 - summer 2001) within Marlborough Creek, central Queensland, Australia, using pressure-sensitive time-depth recorders. Additionally, diurnal variations in water temperature and aquatic Po-2 level, as well as the turtle's behavioural state (i.e., active versus resting), were monitored. In autumn and summer, surfacing frequency increased significantly during the daylight hours, with peak levels normally occurring around dawn (0500-0700) and. dusk (1700-1900). However, no consistent diel surfacing trend was recorded, for the turtles in winter or spring, owing to considerable variation among individual R. leukops. Diurnal surfacing trends recorded for R. leukops in, autumn and summer are attributed to periods of increased activity (possibly associated with foraging) during the daylight hours and not to daily variations in water temperature or aquatic Po-2 level. Turtles generally remained at a depth greater than 1 m throughout the day, where the effect of diel fluctuations in water temperature, (