在夏季采矿行业的室外维修人员和室内服务人员的热应变比较
Sarah M Taggart1, Olivier Girard1, Grant J Landers1
1School of Human Sciences, The University of Western Australia, Crawley, WA, Australia.
PloS one
|October 5, 2023
概括
由于固定时间表,澳大利亚矿山的服务工人比维护工人遭受更大的热应变. 这凸显了对于那些无法在炎热环境中自行选择工作强度的人来说,需要进行水分教育和计划休息.
科学领域:
- 职业健康和安全问题 职业健康和安全问题
- 环境生理学环境生理学
- 采矿行业研究 采矿行业研究
背景情况:
- 在澳大利亚的采矿业中,工作在炎热的环境中很普遍,对认知功能,生产力和健康构成风险.
- 之前的研究表明,暴露于热量对工人的生理和心理影响很大.
研究的目的:
- 为了比较夏季澳大利亚矿业的维护工人和服务工人所经历的热应变.
- 在热应激条件下评估心理生理参数,手工敏捷性和认知功能.
主要方法:
- 一项涉及澳大利亚西北部24名维护和服务工人的比较研究.
- 在14天的时间内,在11-12小时的班次中,在多个时间点评估心理生理参数,手工敏捷性和认知功能.
- 记录了环境条件 (温度,湿度) 和工人的活动 (工作强度,室内/室外暴露).
主要成果:
- 按照固定时间表工作的服务工人报告说,与自行选择工作强度的维护工人相比,他们感觉到的劳动力,热不适,热感和疲劳更高.
- 服务工人比维修工人表现出更高的心率和更低的水分水平 (更高的尿道特异重量).
- 两组之间在核心温度,工作记忆容量,处理速度或手动灵敏度方面没有发现显著差异.
结论:
- 在没有自我选择的工作强度的炎热环境中的工人 (例如,服务工人) 面临更大的热应变和脱水风险.
- 建议包括教育工人水分和实施计划休息时间.
- 雇主应积极监测工人的热病症状,以确保工作场所的安全.
相关概念视频
01:19Thermal Strain
1.4K
Thermal strain is a concept that arises when we consider how temperature changes affect structures. Unlike the conventional assumption that structures remain constant under load, real-world scenarios often involve temperature fluctuations that can significantly impact these structures. Consider a homogeneous rod with a uniform cross-section resting freely on a flat horizontal surface. If the rod's temperature increases, the rod elongates. This elongation is proportional to the temperature...
1.4K
01:09Thermal Stress
2.4K
If the temperature of an object is changed while it is prevented from expanding or contracting, the object is subjected to stress. The stress is compressive if the object expands in the absence of constraint and tensile if it contracts. This stress resulting from temperature change is known as thermal stress. It can be quite large and can cause damage. To avoid this stress, engineers may design components so they can expand and contract freely. For instance, on highways, gaps are deliberately...
2.4K
01:21Masonry in Cold and Hot Weather Conditions
93
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
Other key practices include keeping masonry units...
93
01:28Factors Affecting Body Temperature
4.3K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
4.3K
01:27Thermal expansion and Thermal stress: Problem Solving
1.2K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.2K
02:45Responses to Heat and Cold Stress
13.6K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.6K