Results 121 to 130 of about 78,097 (269)
Ownership and financing of infrastructure : historical perspective [PDF]
The authors summarize the rich and varied experiences of private and public provision of urban services in France, Great Britain, and the United States over the past 100 years.
Jacobson, Charles D., Tarr, Joel A.
core
Water Fluoridation: Institutional Arrangements and Regulatory Mechanisms in Three Selected Countries
Journal of Public Health Dentistry, EarlyView.ABSTRACT Objective To describe and compare regulatory processes for quality control of community water fluoridation (CWF) in three selected countries. Methods Documentary analysis of printed and online resources; correspondence with key informants from Brazil, the United States of America (USA), and England; countries with tradition in water ...
Paulo Frazão +3 more
wiley +1 more source
Jingshui jishu【目的】供水管网是城市关键基础设施，其运行状态与城市功能需求和安全保障紧密关联。城市供水管网具有聚集度高、管龄跨度大、维护环境复杂等特点，越来越多的供水管道在超出设计寿命或存在不同程度损伤的状态下持续运行，成为影响城市公共安全的重要风险因素。现亟需通过系统化流程及科学的方法，提升城市供水管网的运维安全水平。【方法】供水管网安全风险评估方法作为一种前置性风险管控工具，对管网系统中的薄弱环节和高风险区域进行识别、量化与分析，实现了从管道事故的被动响应向风险主动预测与预防的转变 ...
Sun Chengang +3 more
doaj +1 more source
Kyklos, EarlyView.ABSTRACT We study the effect of royal status—a historically rooted legal privilege enjoyed by hereditary monarchs and their families—on human longevity, a proxy of individuals' health capital. We disentangle the effect of royal status that encompassed serving as heads of state from that of other royal family members and compare it to their contemporary
Alberto Batinti +2 more
wiley +1 more source
Jingshui jishu【目的】国内深圳、上海、江苏、浙江等地已经在高品质供水上进行了大量探索，并相继发布了地方供水相关的强制性或鼓励性标准。技术路线上，主要以增设“臭氧+活性炭”深度处理单元，构建长流程处理工艺为主。较长流程往往意味着较大的投资和较高的运维成本，因此，探索采用强化常规工艺实现高品质供水更符合绿色、低碳的高质量发展理念。【方法】浙江省衢州市第四水厂是衢州市首座按照《浙江省城市供水现代化水厂评价标准》建设的水厂，设计采用运行安全可靠的“折板絮凝—平流沉淀—V型滤池”传统短流程工艺 ...
Liao Huafeng +5 more
doaj +1 more source
Home Safe Home: Safety Gains Through Telework During the Covid‐19 Pandemic
LABOUR, EarlyView.ABSTRACT This paper exploits exogenous shifts in work organisation during the Covid‐19 pandemic to study the implications of hybrid and remote work arrangements on occupational safety. Combining accident registers and household survey microdata from Hungary, we are able to address potential selection and reporting bias, and reliably identify the ...
Bálint Menyhért, Szilárd Erhart
wiley +1 more source
Jingshui jishu【目的】多年来，核电厂放射性废水处理主要依赖化学沉淀法、离子交换法、蒸发浓缩法等传统工艺，这些方法普遍存在流程复杂，处理精度有限，易产生二次污染等问题，难以满足日益严格的绿色排放要求。【方法】因此，本文介绍了一种利用膜分离技术处理核电厂低放射性废水的有效方法，该方法通过超滤-纳滤-反渗透-吸附的组合膜工艺，达到综合处理的目的。本文使用某核电厂的真实放射性废水，研究了在不同pH条件下，该组合膜工艺对关键放射性核素的去除效果、总γ比活度的降低情况以及对硼酸的分离性能。【结果 ...
Xiong Kouhong +4 more
doaj +1 more source
Incorporating LCA Method into Asset and Facility Life Cycle Management [PDF]
, 2007 With the increasing awareness of sustainable development, incorporation of potential environmental impact into the consideration of asset and facility life cycle management is attracting increasing attention.
Guan, Lishan
core +1 more source
Social Equity Practices in Public Financial Management: A Conceptual Review and Proposed Reforms
Public Administration, EarlyView.ABSTRACT Equity has been at the core of public finance going at least as far back as 1776 when Adam Smith included it as one of four canons of a good tax in his classic An Inquiry into the Nature and Causes of the Wealth of Nations (Tax Project Institute 2025).
John R. Bartle +2 more
wiley +1 more source
Jingshui jishu【目的】为探究泥膜复合移动床生物膜反应器(MBBR)工艺在污水处理厂提标改造中的实际应用效果，针对长三角某设计处理规模为20万m 3 /d污水处理厂的实际效果进行研究。【方法】本文分析了悬浮载体投加对于生化系统脱氮性能的改善效果，研究了泥膜复合系统中泥膜两相硝化性能差异、MBBR区分级和载体投加区域对于硝化性能的影响。【结果】在泥膜系统中，生物膜硝化菌相对丰度最大可达6.66%,是同系统活性污泥的6.34倍，保障了水力停留时间(HRT)缩短46.5%情况下的稳定达标 ...
Wu Lei +5 more
doaj +1 more source