EXPANDING WASTE WATER TREATMENT CONSIDERATIONS AT CORPS OF ENGINEERS RECREATION AREAS1

ABSTRACT. There have been many changes in the waste water treatment requirements at St. Louis District Corps of Engineers projects over the past few years. Discussed are the methods considered for treating these wastes. Extended aeration plant, followed by filtration, is the process used in most of the areas. The treatment plant operators have become key members of the project operation team. A discussion of the Districts operator training program is presented along with the operator's job requirements. Through a Spring inspection of all treatment plants in the District, a mechanism has been provided for encouraging feedback to the design engineer from the operator.     

城市降雨径流对桂林四湖水质的影响

摘要：为了研究城市降雨径流对桂林四湖水质的影响,在某场强降雨的前后,对桂林四湖湖水的氨氮、总磷、高锰酸盐指数和浊度进行了监测与比较,结果显示降雨中各指标农度高于降雨前。其中变化最明显的是氨氮和高锰酸盐指数。在雨后60min,由于湖水的自净作用,湖水的高锰酸盐指数和浊度明显下降,而氨氮和总磷浓度的值下降不明显。总的来说,城市雨水径流对湖水具有一定程度的影响。     

剖析钻井作业现场安全培训误区

本文通过分析钻井作业现场安全培训中普遍存在混淆安全教育和培训的概念、培训工作的主体责任错位、过于细化培训需求、安全培训方法不适宜、过多依靠外部培训师资五个方面的误区,提出了具体的解决对策,可为企业进一步改善钻井作业现场的安全培训效果提供参考.     

沙特阿美石油公司的HSE管理

介绍了沙特阿美石油公司HSE管理的主要经验,分析了阿美公司3项群众性的安全活动、分级取证及监管体系的科学性和实用性,并结合中国石化油田企业实际提出了HSE工作改进建议．     

清洁生产审核校企合作初探

高等职业院校大力推行校企合作培养高技能人才模式,探索校企合作的持续发展机制,是职业教育界和企业界的一个重要课题。本文通过＂扬州市节能减排技术普及公共服务平台资助项目＂课题的开展,在清洁生产审核校企合作实践的基础上,探索新形势下校企合作的内涵、意义及模式,剖析校企合作的动力与阻力,并对如何实现真正意义上的校企合作提出构想与建议。同时,对于清洁生产审核开展过程中,企业如何获得高校的支持也有参考意义。     

一体化联合作战后勤训练电磁环境构建方法研究

针对一体化联合作战后勤训练的特点,提出了可视化战场电磁环境和模拟战场电磁环境两种构建方法,并对模拟战场电磁环境的构建方法作了详细阐述。应坚持作战与训练的双重需求,强化军用与民用的优势互补,注重定性与定量的有机结合。     

地面防空部队信息化训练电磁环境的构建研究

针对地面防空部队在复杂电磁环境条件下的作战训练需求,在分析了所需电磁环境构建要求后,结合地面防空部队作战训练时电磁环境的特点,罗列出构建内容,着重讨论了复杂电磁环境的构建方法并比较其优缺点,为地面防空部队有针对性地开展复杂电磁环境下的训练提供了依据。     

非煤矿山虚拟现实安全培训系统的研究与构建

针对现有非煤矿山安全培训不足、效果不佳,现有安全培训系统构建复杂、功能单一的情况,运用虚拟现实技术,结合3dsMax建模与Unity3D平台,构建相应角色、场景,划分矿井漫游和应急培训2个模块;设计各个模块的基础功能与培训内容,以第一人称操作的方式对井下工作人员进行安全教育,增强培训时的沉浸感与交互性。结果表明:该虚拟现实培训系统能够以较简单、易实现的方式达到安全教育的目的,其设计与开发可以使得安全培训更加安全高效,提升学员的学习兴趣。     

Preventing fall-from-height injuries in construction: Effectiveness of a regulatory training standard

Introduction: A regulatory training standard for construction workers using fall protection equipment became mandatory in 2015 in the province of Ontario, Canada. By the end of the transition period in 2017, 418,000 workers had been trained to the new standard. Two primary research questions were posed: (1) To what extent does the WAH training affect practices at the worksite? and (2) Has there been a change in the incidence of fall-from-height injuries coincident with the introduction of the WAH Training Standard? Materials and methods: A longitudinal survey of 633 learners was conducted in 2017 at one-, four- and seven-week post-training. A quasi-experiment estimated the incidence of lost-time injuries attributed to falls from heights in 2017 compared to 2012–2014 for a census of construction workers insured for work disability in Ontario, Canada. Results: Learners self-reported substantial increases in knowledge of and improvements in safe work practices when working at heights. The incidence rate of lost-time claim injuries attributed to falls targeted by the training declined by 19.6% (95% CI: 10.7, −27.6), compared to corresponding declines of 2.1% (95% CI: −6.3, 9.9) for other fall injuries and 7.2% (95% CI: 1.8, 12.3) for non-fall traumatic injuries. The observed decline was largest among the smallest employers (<5 full-time equivalent employees). Conclusion: The evaluation findings provide consistent support for a conclusion that the mandatory training standard was effective in reducing the incidence of injuries targeted by the training. However, the effects were modest and did not eliminate the problem. Practical application: A mandatory training standard should be considered as one approach to preventing traumatic injuries. However, other approaches higher in the hierarchy of risk controls should also be considered.     

Implementing and evaluating novel safety training methods for construction sector workers: Results of a randomized controlled trial

Introduction: The construction industry is regarded as one of the most unsafe occupational fields worldwide. Despite general agreement that safety training is an important factor in preventing accidents in the construction sector, more studies are needed to identify effective training methods. To address the current research gap, this study evaluated the impact of novel, participatory safety training methods on construction workers’ safety competencies. Specifically, we assessed the efficacy of an immersive virtual reality (VR)-based safety training program and a participatory human factors safety training program (HFST) in construction industry workplaces. Method: In 2019, 119 construction sector workers from eight workplaces participated in a randomized controlled trial conducted in Finland. All the study participants were assessed using questionnaires at baseline, immediately after the intervention and at one-month follow-up. We applied generalized linear mixed modeling for statistical analysis. Results: Compared to lecture-based safety training, VR-based safety training showed a stronger impact on safety motivation, self-efficacy and safety-related outcome expectancies. In addition, the construction sector workers who participated in the VR-based safety training showed a greater increase in self-reported safety performance at one-month follow-up. Contrary to our study hypotheses, we found no significant differences between the study outcomes in terms of study participants in the HFST training condition and the comparison condition without HFST training. Conclusion: Our study indicates that VR technology as a safety training tool has potential to increase safety competencies and foster motivational change in terms of the safety performance of construction sector workers. In the future, the efficacy of participatory human factors safety training should be studied further using a version that targets both managerial and employee levels and is implemented in a longer format. Practical implications: Safety training in virtual reality provides a promising alternative to passive learning methods. Its motivating effect complements other safety training activities.