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.)     

Cognitive and interpersonal abilities related to the primary activities of R&D managers

This study attempted to identify the primary activities performed by R&D managers at different supervisory levels, and the cognitive and interpersonal ability requirements that underlie these activities. A task inventory containing 244 managerial tasks was completed by 117 R&D managers in nine organizations. The 48 tasks which managers rated as having spent the most time were factor analyzed, resulting in the identification of three primary activities: project management, personnel supervision, and strategic planning. Furthermore, these activities varied with supervisory level, with R&D managers performing a wider range of these activities with the progression from first-line to upper-level management.Thirty R&D managers later rated the degree to which 19 cognitive and interpersonal abilities were required for performing these primary activities. Strategic planning was rated as requiring significantly higher levels of oral expression, logical reasoning, originality, fluency of ideas, oral defense, and resistance to premature judgement than was required for the other two primary activities. Personnel supervision required a higher level of social sensitivity than was required for the other two activities. Project management required high levels of information ordering, oral fact- finding ability, problem sensitivity, and oral and written comprehension. Implications of the findings for understanding R&D managerial performance and personnel staffing functions are discussed.     

海上救助公约的发展及其主要影响

1989年通过的国际救助公约对传统的“无效果无报酬”原则所作的例外规定,引起了海运界和贸易界的极大关注,从而导致某些国际规则和国内法的修订。本文运用比较的方法对海上救助公约的发展及其对英国劳氏标准救助契约、国际共同海损理算规则和我国海商法的影响作了论述,并且提出了我国当前海商法应作修改补充的几点建议。     

一般Gauss－Markov模型下一般可估函数的线性充分性和线性完全性

发展了Ｂａｋｓａｌａｒｙ和Ｄｒｙｇａｓ提出的一般Ｇａｕｓｓ－Ｍａｒｋｏｖ模型中线性充分性、最小充分性和完全性的概念，用Ｒａｏ的最小二乘统一理论，给出了这些概念的刻划定理。     

舆论监督:党风廉政建设和反腐败斗争的重要支点

完善民主监督制度,需要发挥舆论监督的作用。舆论是一定的社会集团对社会上某些重要问题重大事件所公开表露的带有倾向性的意见和言论,有自在型与自为型两种形态。舆论监督的主要形式有:新闻监督、群众监督、党内监督;舆论监督有及时、公开、广泛、特效、权威的特点;舆论监督的注意事项:服从、服务大局;舆论监督的作用:廉政建设的重要支点。     

试论我国现代企业制度中的会计监督

《会计法》、《企业会计准则》、《企业财务通则》等法律法规的颁布和实施 ,适应了企业改革中建立现代企业制度的要求 ;但是 ,企业会计监督职能弱化仍是目前会计工作的一大顽症 ,会计报表中“虚盈实亏”的现象仍相当突出 ,直接影响到国家宏观经济政策的制定和宏观调控措施的实施。文章就企业会计中存在的问题进行探讨 ,并提出相应的对策。     

孙皓时期皇权的强化及其与儒学朝臣冲突的加剧——孙吴后期政治史研究之二

252年孙权去世,孙吴皇权一度旁落。孙皓继位后,清除权臣,政由己出,一度整肃朝政,颇得赞誉。不过,作为孙吴末代专制君主,孙皓地位稳固后,努力强化皇权,主要表现为重用佞幸小人,加强对儒学朝臣的监察,迁徙都城,甚至无端地兴师北伐以搏取声望。在生活上,孙皓则荒淫奢靡,并无稳定社会、增强国力、体恤百姓的愿望与举措,引起了儒学士大夫的激烈抗争。对士大夫社会的清议之士,孙皓多有杀戮之举。士大夫社会的疏离,动摇了孙吴统治的基础。     

对工程造价控制管理问题的探讨

分析我国工程造价管理中存在的问题;从工程建设全过程出发,论述如何控制工程造价。     

商业银行中间业务及风险管理的几点思考

我国商业银行在中间业务发展上与外资银行相比存在较大的差距。面对外资银行进军中国市场的事实,我国商业银行只有大力发展中间业务才能抵抗外资银行的冲击。发展中间业务必定伴随着风险的出现,特别是与业务发展相关的风险巨大,银行自身必须从内部做好相关的风险防范与管理;同时,银行监督管理部门也要从外部做好相关的风险管理工作,来保障和促进商业银行中间业务的发展。     

民族地区县级政府竞争：路径选择与制度安排

我国地方政府竞争的趋势将愈演愈烈,地方政府竞争带来了不同的竞争效应。文章对地方政府竞争模型的反思入手,分析了民族地区政府竞争的特征和存在问题的基础上,提出了民族地区提升政府竞争力的路径选择:以提升制度竞争力为先,推进市场、产品等要素建设;并对民族地区政府竞争提出相应的制度和政策安排。