Scheduling Updates of Probabilistic Risk Assessments: The Arkansas Nuclear One-Unit 1 Experience

This paper presents the results of a study that identified how often a probabilistic risk assessment (PRA)should be updated to accommodate the changes that take place at nuclear power plants. Based on a 7-year analysis of design and procedural changes at one plant, we consider 5 years to be the maximum interval for updating PRAs. This conclusion is preliminary because it is based on the review of changes that occurred at a single plant, and it addresses only PRAs that involve a Level 1 analysis (i.e., a PRA including calculation of core damage frequency only). Nevertheless, this conclusion indicates that maintaining a useful PRA requires periodic updating efforts. However, the need for this periodic update stems only partly from the number of changes that can be expected to take place at nuclear power plants–changes that individually have only a moderate to minor impact on the PRA, but whose combined impact is substantial and necessitates a PRA update. Additionally, a comparison of two generations of PRAs performed about 5 years apart indicates that PRAs must be periodically updated to reflect the evolution of PRA methods. The most desirable updating interval depends on these two technical considerations as well as the cost of updating the PRA. (Cost considerations, however, were beyond the scope of this study.)     

社会转型期我国基本刑事政策的调整

社会转型期,我国的基本刑事政策从镇压与宽大相结合,到惩办与宽大相结合,再到宽严相济,发生了深刻的变革。社会转型过程中刑事政策的调整,从结构上来说,主要是基本刑事政策的调整。根据社会转型的主要趋势,社会转型后期的基本刑事政策应当着重体现:高度关注人权保障、"轻轻重重"两极化、强调犯罪预防。     

From Pong to Planet Quake: Post-Industrial Transitions from Leisure to Work

In the closing weeks of 2002, video games were featured in various popular American news publications and media outlets such as Wired, Entertainment Weekly, Newsweek and Time Magazine. It is becoming increasingly apparent that video games are no longer child's play, but rather that they are poised to become a major entertainment form for the twenty-first century. Social analysts and media scholars must begin to formulate an understanding of this emerging mass-consumer phenomenon because it will increasingly impact social and economic structures of post-industrial societies. Part of the tremendous value generated by the American video-game industry is tied into broad global economic shifts that have created a space where services and ephemeral products, such as software, can be created and cheaply distributed. The predominance of " high-tech' production, the rise of the Internet, and the cultural capital associated with computerization all have contributed to the rise of hobbyist software developers that currently tinker with commercial video games and freely add to them increasing levels of sophistication. This paper sees video-game programmer hobbyists as a source of some of the significant value that the video-game industry generates, and understands the role of the programmer hobbyists through the lens of theories on post-industrial work. My analysis situates the work of hobbyists on the Internet within the context of post-Fordism and explores some of the motivations for this unwaged work. In the sections that follow, I will analyse the potential value of the work hobbyist do as well as analyse its transition to paid work as some commercial software developers experiment with incorporating these fan bases into the game design process.     

Impacts of Home Modifications on Aging-in-Place

The purpose of this study is to analyze the relationship between home modifications and aging-in-place. Using the ENABLE-AGE United Kingdom sample (N = 376), the authors hypothesize that seniors who have modified their housing are likely to have stayed longer in their current housing. There is a positive relationship between home modifications and aging-in-place. The results underscore the importance of supportive environment to prolong living in housing settings.     

Housing Conditions and Risk: Reporting on a European Study of Housing Quality and Risk of Accidents for Older People

The declining capacities in older people often lead to limitations in activities of daily living and a simultaneous rising demand for care services. Many of these limitations in daily activities are to a varying degree caused, enhanced or facilitated by disadvantageous housing and environmental conditions. Home modifications have been credited as an important part of the solution, allowing for an extended and safer use of the home. In order to examine this issue in more detail, this paper provides empirical evidence on the type and extent of risks associated with accidents around the home. It reports on findings from a European case study on the difficulties using the home and risks of accidents which may lead to injury. It is argued that healthy housing conditions for older persons are important to maximize the supportive capacity of one's home, to stimulate an active and healthy lifestyle, and to avoid unnecessary institutionalization.     

The use of performance measurement as a basis for project control of offshore modification oil and gas projects

The methods presented in this article are based on the qualitative and quantitative analysis of close-out data drawn from a portfolio of 38 modification projects. The primary premise is that modification projects are intrinsically subject to quantity and complexity growth during the course of detailed engineering as a consequence of the indeterminate interface with the existing facility. The normative project control routines need to be supplemented by material take-offs-based weight monitoring as a basis for re-estimation and re-calibration of the project baselines as detailed engineering proceeds in order to mitigate this uncertainty as early as possible. Similarly, estimating needs to be based on norms drawn from performance measurement of modification work rather than extrapolations from greenfield projects, particularly the work performed on the platforms. This article presents a portfolio of project control methods based on the performance measurement principle covering the short term of single projects as well as the longer term multi-project perspective.     

Accessibility Improvement Models for Typical Flats: Mass-Customizable Design for Individual Circumstances

ABSTRACT

Elderly housing policies in Finland emphasize aging in place and preparing the existing housing stock for the predicted increase in the aged population. Timely home modifications that enhance mobile accessibility are a focal target for these policies. This article introduces the idea of mass-customizable architectural accessibility improvement models (AIMs) that have been developed for typical Finnish flats. The applicability and generalizability of an AIM designed for an archetypal two-room flat is tested by applying it to nine case buildings in the city of Tampere. The model was found to be beneficial for 42 of the 45 rooms in the research material.     

Sheltered Housing in Britain

Following an analysis of the growing "need" and demand for sheltered housing, the paper considers the function of different sheltered housing types and the role of the warden. Sheltered housing management is also addressed and planning and policy conclusions drawn. The principle sources of data referred to in the paper consist of surveys of 17 housing managers, 156 wardens and some 5,000 or so tenant records, drawn from the urban West Midlands and rural Devon. Management and warden opinions and characteristics are analaysed against site and tenant characteristics (e.g., demographic, health, activity and movement/transition patterns).     

淡水养殖珍珠的激光拉曼光谱特征与改色珍珠的鉴定

采用激光拉曼光谱对各种颜色的淡水养殖珍珠和辐照改色淡水养殖珍珠进行了研究．发现了天然有色珍珠与辐照改色珍珠间的拉曼光谱的差异，据此建立了快速、无损鉴定改色淡水养殖珍珠的方法．     

论《东瀛诗选》对服部南郭诗的修改

俞樾对日本汉诗原作的改动,虽不影响《东瀛诗选》选政之精审,但从文献保存来说,修改原作的做法不足为训。选家不宜直接修改原作。