PubMed Health⌕ Search

Biomedical subjects

S L Walker

Publications and source records attributed to S L Walker.

60 records · Page 4Linked to original sources
PubMed1975

An acoustical trigger for impact noise studies.

In making oscilloscopic studies of impact noise there is often a problem of coordinating the oscilloscope with the noise event. This paper describes a simple noise trigger that has been used successfully in a number of studies.

Acoustics↗
PubMedDate not supplied

Canadian environmental effects monitoring: experiences with pulp and paper and metal mining regulatory programs.

In Canada, Environmental Effects Monitoring (EEM) programs exist within two regulations: the Pulp and Paper Effluent Regulations and the new Metal Mining Effluent Regulations under the Canadian Fisheries Act. EEM provides a biological, effects-based feedback loop to assess the effectiveness of technology-based regulations in protecting receiving environments. The promulgation of the Pulp and Paper Effluent Regulations, in 1992, represented a significant step forward in the Canadian regulatory approach by incorporating directly into a regulation a requirement to assess the effects of effluent discharges on receiving environments using proven scientific monitoring methodologies. Similarly, an assessment of the aquatic impacts of mines resulted in recommendations to amend the Metal Mining Effluent Regulations, recently promulgated in 2002, and includes an EEM program as a science-based feedback loop. As such, these regulations recognize the possibility that national, technology-based standards may not necessarily protect all receiving environments because of the diversity and variability of both discharges and receiving sites across the country. Since that time, EEM has improved its flexibility by considering both advances in science and the uniqueness of monitoring sites across Canada to allow the most appropriate and cost-effective monitoring approaches at each site while maintaining national consistency. This paper discusses the use of monitoring under two Canadian regulations to assess effects on aquatic ecosystems. As well, the National EEM approach to maintaining up-to-date scientific practices in a national regulatory program is discussed using examples.

Canada↗
PubMedDate not supplied

Reducing devices for pressure sores with respect to nursing care procedures.

In a study that focused on patient comfort and ease of performing nursing care activities 10 common pressure-reducing devices were evaluated for cost, stability, dimensions, positioning, temperature, bounce, noise, cleaning, leakage, weight, mechanical reliability, linen displacement, transfers, bathing, feeding, and dressing. Thirteen subjects--six quadriplegic patients, five paraplegic patients, and two patients with cerebrovascular accidents--and three nurses evaluated each device according to a prearranged schedule of daily patient care activity. Each subject tested five devices at least four times during two separate 24-hour periods. The devices were ranked and rated by subjects and nurses. When Kendall rank correlation coefficients were compared, the tau for ranking by subjects and nurses was .82; for rating, .42; and for ranking and rating combined, .73. Subjective comments by subjects and nurses were examined for relevant factors.

Equipment and Supplies, Hospital↗