The aim of the study was to obtain comprehensive anthropometric data from which to develop a sizing system appropriate for inclusion in specifications for protective clothing; and for purchases of other selected equipment. Fifty-five body dimensions on a male sample of the New Zealand Fire Services (n = 691, approximately 7% of employees) were obtained by direct measurement. Descriptive statistics and selected percentiles (5th, 50th, 95th) are given. The body dimensions accounting for most of the variance in the data were established by factor analysis and are reported here. Size groups for various body sections based on the relevant measurements of that section were established by cluster analysis around a control variable.
The purpose of this investigation was to evaluate the ventilatory characteristics of vented and non-vented helmets for use in forestry harvesting operations. A ventilation index developed by Birnbaum and Crockford (1978) was used to determine the ventilation capacity of twelve helmets varying in design and presence, location, and dimension of vents. Helmets with top vents had higher ventilation indices than non-vented, side and side/top-vented helmets. Ten physically fit men participated in a maximal oxygen consumption test and four trials wearing a non-vented, round-side-vented, round-top-vented or rectangulartop-vented helmet. Trials simulated typical summer environmental conditions (28 degrees C, 80% rh) and physiological work loads (40% VO(2)max) experienced during forest harvesting in New Zealand. The temperature and humidity under the helmet was typically lowest when the helmet with the largest vented area (288 mm(2)) in the crown was worn, although physiological responses (temperatures at the tympanum, ear and scalp; humidity at the centre of the helmet) of the participants to wearing the helmets differed significantly during some rest periods only. Top-vented helmets (in this experiment measured 288 mm(2)) should be worn to minimize temperature and humidity of the head during forest harvesting operations.
The rate and volume of air exchanged between the bed microclimate and the ambient environment determines in part how much heat is lost from the human body. This study investigated the ventilatory characteristics of infant over-bedding to determine whether different combinations of bedding items (i.e. sheets, blankets, duvets) and types of tucking (i.e. loosely, firmly and swaddled/firmly tucked) affected microclimate ventilation. Microclimate volumes and air exchange rates were determined and used to calculate the ventilation indices. The presence of a duvet in the bedding combination resulted in lower ventilation indices than when bedding did not include a duvet. The type and combination of blankets did not significantly affect ventilation indices. The type of tucking had a significant effect on ventilation indices only when the assembly did not include a duvet.
Rats with lesions of the occipital pole or a more anterior extrastriate area were tested on either original learning of a successive brightness discrimination or retention of this task after acquisition as a normal. Equivalent original learning losses relative to normals were sustained from both lesions, but while extrastriates showed substantial savings in retention, rats with occipital pole damage required as many relearning trials as were necessary for original learning by brain-damaged groups. It was suggested that the effect of the anterior extrastriate lesion was to impair a spatial or positional component of discrimination performance, and that this component might differ from one related to visual task properties, especially in terms of recovery of function following brain damage.
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