Lung Cancer Risk from Radon in Marcellus Shale Gas in Northeast U.S. Homes

The amount of radon in natural gas varies with its source. Little has been published about the radon from shale gas to date, making estimates of its impact on radon‐induced lung cancer speculative. We measured radon in natural gas pipelines carrying gas from the Marcellus Shale in Pennsylvania and West Virginia. Radon concentrations ranged from 1,520 to 2,750 Bq/m³ (41–74 pCi/L), and the throughput‐weighted average was 1,983 Bq/m³ (54 pCi/L). Potential radon exposure due to the use of Marcellus Shale gas for cooking and space heating using vent‐free heaters or gas ranges in northeastern U.S. homes and apartments was assessed. Though the measured radon concentrations are higher than what has been previously reported, it is unlikely that exposure from natural gas cooking would exceed 1.2 Bq/m³ (<1% of the U.S. Environmental Protection Agency's action level). Using worst‐case assumptions, we estimate the excess lifetime (70 years) lung cancer risk associated with cooking to be 1.8×10^?4 (interval spanning 95% of simulation results: 8.5×10^?5, 3.4×10^?4). The risk profile for supplemental heating with unvented gas appliances is similar. Individuals using unvented gas appliances to provide primary heating may face lifetime risks as high as 3.9×10^?3. Under current housing stock and gas consumption assumptions, expected levels of residential radon exposure due to unvented combustion of Marcellus Shale natural gas in the Northeast United States do not result in a detectable change in the lung cancer death rates.     

西方平等理论从古典自然法学到新自然法学的嬗变

平等是一个非常复杂和抽象的范畴,西方法学对平等理论的热爱和追逐从未停止过,从古典自然法学追求的抽象的平等的政治理想,到新自然法学对平等的制度设计的现实关怀,平等理论随着自然法学的发展实现了其自身的嬗变,这种改变也是时代的要求、历史的必然。     

Perceptions of Risk and Vulnerability Following Exposure to a Major Natural Disaster: The Calgary Flood of 2013

Many studies have examined the general public's flood risk perceptions in the aftermath of local and regional flooding. However, relatively few studies have focused on large‐scale events that affect tens of thousands of people within an urban center. Similarly, in spite of previous research on flood risks, unresolved questions persist regarding the variables that might influence perceptions of risk and vulnerability, along with management preferences. In light of the opportunities presented by these knowledge gaps, the research reported here examined public perceptions of flood risk and vulnerability, and management preferences, within the city of Calgary in the aftermath of extensive flooding in 2013. Our findings, which come from an online survey of residents, reveal that direct experience with flooding is not a differentiating factor for risk perceptions when comparing evacuees with nonevacuees who might all experience future risks. However, we do find that judgments about vulnerability—as a function of how people perceive physical distance—do differ according to one's evacuation experience. Our results also indicate that concern about climate change is an important predictor of flood risk perceptions, as is trust in government risk managers. In terms of mitigation preferences, our results reveal differences in support for large infrastructure projects based on whether respondents feel they might actually benefit from them.     

菲利普斯曲线在中国的有效性研究

从基本的菲利普斯曲线理论出发,提出了新的适应性预期模型,并以此为基础建立附加预期的菲利普斯曲线方程,进而估计出我国近年来的自然失业率水平,由此证明了菲利普斯曲线在我国的有效性,并描述了预期因素对实际通货膨胀水平的影响。最后结合实证分析结果提出解决我国通货膨胀和失业问题的建议,如保证货币政策的连贯性、加强信息披露、解决结构性失业问题等。     

红色文化增进铸牢中华民族共同体意识的多维向度解析

红色文化是中国革命建设征程的历史凝结,补钙壮骨,通今溯源,与中华民族共同体意识有着严密的耦合逻辑。在政治上,红色文化有利于坚定中国共产党的领导,明晰铸牢中华民族共同体意识的政治前提;在经济上,红色文化彰显社会主义市场经济的民族互惠指向,夯实铸牢中华民族共同体意识的经济基础;在文化上,红色文化标注社会主义先进文化建设的中国底色,聚合中华民族共同体建设的文化动力;在社会上,红色文化促进各民族交往交流交融,提升铸牢中华民族共同体意识的社会认知;在生态上,红色文化有助于建立人与自然交响协奏的生命共同体,筑牢中华民族共同家园的生态底线。     

Reframing Resilience: Equitable Access to Essential Services

We urgently need to put the concept of resilience into practice if we are to prepare our communities for climate change and exacerbated natural hazards. Yet, despite the extensive discussion surrounding community resilience, operationalizing the concept remains challenging. The dominant approaches for assessing resilience focus on either evaluating community characteristics or infrastructure functionality. While both remain useful, they have several limitations to their ability to provide actionable insight. More importantly, the current conceptualizations do not consider essential services or how access is impaired by hazards. We argue that people need access to services such as food, education, health care, and cultural amenities, in addition to water, power, sanitation, and communications, to get back some semblance of normal life. Providing equitable access to these types of services and quickly restoring that access following a disruption are paramount to community resilience. We propose a new conceptualization of community resilience that is based on access to essential services. This reframing of resilience facilitates a new measure of resilience that is spatially explicit and operational. Using two illustrative examples from the impacts of Hurricanes Florence and Michael, we demonstrate how decisionmakers and planners can use this framework to visualize the effect of a hazard and quantify resilience-enhancing interventions. This “equitable access to essentials” approach to community resilience integrates with spatial planning, and will enable communities not only to “bounce back” from a disruption, but to “bound forward” and improve the resilience and quality of life for all residents.     

Spatial Distribution of Flood Risk and Quality of Spatial Management: Case Study in Odra Valley,Poland

This article presents methodological solutions aimed at presenting the spatial distribution of flood risk and quality of spatial management (land use), indicating both those areas used reasonably and those requiring modification. The purpose was to identify key risk areas and risk‐free areas from the point of view of human security and activity on the floodplains, based on the examples of the vicinities of Wroclaw and Raciborz in the Odra Valley, Poland. Due to recent climate change, Poland has suffered the effects of severe flooding (e.g., 1997, 2001, 2010). The analyses conducted were motivated by the European Parliament and Council's recently implemented Directive 2007/60/WE, as well as by the demand for studies for local spatial planning. The analysis indicates that reasonably developed areas do not account for the majority of those studied, making up 36% of the Wroclaw area and 15% of the Raciborz area.     

从革命文化到红色文化：一项概念史的研究与分析

方兴未艾的中国红色文化研究,首先需要面对的是从革命文化到红色文化的概念转换,这一概念转换以及与当下社会语境的关联,是当前文化研究中特别值得注意的学术现象,但学界对之探究甚少。这里尝试构建适应红色文化研究的概念逻辑,采用概念史的研究方法,对革命文化向红色文化的概念转换加以研究。革命文化与红色文化都是以革命为主导理念的文化形态;但红色文化同时还是当前特别值得关注的文化现象。这一概念转换是在重新认识革命与革命文化的时代语境下发生的,红色教育、红色旅游与红色文化产业开发,是红色文化兴起的主要契机,凸显了当前社会对革命文化的资源属性的高度重视,体现了后革命时代境遇下革命话语的转型。     

国际资源贸易理论与政策的研究述评

近年来,国际资源贸易发展迅猛,其重要性日益凸显。国际贸易学者从理论与政策两方面对国际资源贸易进行了研究。理论研究涵盖H-O模型对国际资源贸易的解释力、不完全竞争市场下国际资源贸易的分析框架、国际资源贸易产品价格波动的原因与价格弹性估计、国际资源贸易与"资源诅咒"的关系等问题。政策研究主要包括对国际资源贸易实施的出口税、出口配额以及进口关税的经济效应分析等。目前,学术界还没有形成统一的国际资源贸易分析框架,WTO需要把国际资源贸易置于多边贸易体制的规制之下。     

生命信息的交融互渗——中国花鸟画审美初探

自然界的有生命之物,以其不同的形状、色彩、气息和动静之态,而有着不同的审美价值.它们的美是生命之美.中国花鸟画不以再现自然对象的外形为目的,而以思想、情感、意趣等生命现象的高级形式反映在作品中.作者根据主观的审美理想和自我生命的节律加以重新创造,使其固定为物化状态,给人以美的滋养.