The differences in perception of radiological risks: lay people versus new and experienced employees in the nuclear sector

This paper studies the differences in perception of two radiological risks – an accident at a nuclear installation and medical X-rays – between four different groups: the general population without (1) and with experience related to radiological risks (2), new employees (3) and professionally exposed people (4) in the nuclear sector. More precisely, this study determines if differences in risk perception can be explained by the level of experiences with ionizing radiation, the knowledge level about radiological risks, the confidence in authorities, the attitude towards nuclear energy, the trust in a management of nuclear installations, gender and age. The data are gathered using computer assisted personal interviews based on the SCK-CEN Barometer of the Belgian Nuclear Research Centre. The relations between risk perception and the independent variables are tested with linear regression analysis. The risk perception of both risks differs significantly between the four population groups. The professionally exposed people and the new employees in the nuclear sector have a significant higher risk perception for medical X-rays compared to the risk for an accident at a nuclear installation. For the general population without experience, it was just the opposite. The general population with experience does not have a significant difference in risk perception between the two radiological risks. Level of experiences with ionizing radiation is determined as an important variable; people have a lower perception of radiological risks when they have higher experiences with risk.     

Food risk communication: Some of the problems and issues faced by communicators on the Island of Ireland (IOI)

In this paper we consider the findings of a number of interlinked pieces of research, both qualitative and quantitative, that have investigated aspects of food risk communication on the island of Ireland. These findings are set in the context of international risk communication research. The findings are examined using the three basic elements of a simple communications framework: the message sender; the channel through which the message is communicated and the receiver of the message. The barriers to effective communication are examined and special reference is made to the barriers affecting the communication of domestic food safety risk. Barriers identified include personal, infrastructural and message related factors, such as lack of interest, lack of appropriate facilities and conflicting messages. Based on an evaluation of the views of the scientific community and the public, we make suggestions on how future food safety communications could be tackled to better address the identified barriers. Both suggested long and short term policies are considered in the context of a heterogeneous public and scientific community. Short term suggestions provide an opportunity to address the challenges faced by those who are currently exposing themselves to a high level of domestic food safety risk. The long term suggestions reflect on the underlying barriers impacting on public domestic food safety practices.     

Perception and use of landscape concepts in the procedure of Environmental Impact Assessment: Case study—Switzerland and Romania

The European Landscape Convention (ELC) defines landscape as “an area, as perceived by people, whose character is the result of the action and interaction of natural and/or human factors”. Because all aspects linked to landscape are evaluated during the Environmental Impact Assessments (EIAs) procedure, we assessed the Swiss and Romanian experts’ perception and EIA reports regarding the landscape concept. Therefore, we analysed Swiss and Romanian experts’ perception of landscape, we evaluated concepts and methods used in environmental impact reports to assess landscape characteristics and functions, and how the ELC's aim and objectives are reflected by the EIA reports.The Canonical Correspondence Analysis performed to evaluate the experts’ perception of landscape integration in the EIA procedure showed a significant relationship among pattern of answers and experts’ professional background. Moreover, there is a significant difference between Swiss and Romanian expert's perception. Longer experience in the field and a higher level of education indicates higher awareness of landscape characteristics and properties, which demonstrates that alongside with the initial training, there is a need for developing a coherent long-life learning systems having landscape analysis as a focus.The ELC is familiar to nearly 86% of the Romanian Environmental Impact Assessment actors and nearly 29% of the Swiss experts. By contrast, most of the Romanian EIA reports analysed do not employ many concepts of the ELC, while most of the Swiss environmental reports incorporate objectives of landscape protection consistent with the Convention.Our study relies on the comparative investigation of representative case studies of Environmental Impact Assessment reports for industry, local infrastructures, tourism facilities, and wind farm projects, as well on tracking how the European Landscape Convention is reflected by the EIA reports. We found that EIA reports from both countries evaluate the visual landscape, thus, achieving subjective assessment of landscape aesthetics without focusing on social and ecological sub-systems. Quantitative elements of landscape analysis are mostly absent and it is challenging to evaluate whether environmental assessments are consistent among European Landscape Convention countries.To overcome the abstract way of evaluation of project's impact on landscape through EIA procedure, an improved landscape analysis procedure is needed and we propose developing technical guidelines, under the European Landscape Convention umbrella, in order to enhance landscape management.     

Great deeds or great risks? Scientists’ social representations of nanotechnology

Nanotechnologies are becoming a larger presence in everyday life and are viewed by governments and economic actors as a key area for development. The theory of social representations suggests that specialist views eventually disseminate to shape representations among the public. Yet nanotechnologies remain relatively little known to the general public. The media emphasize potential benefits, while potential risks get less attention. The literature has not yet addressed whether representations by a well-informed population (scientists) are indeed structured in terms of the risk–benefit polarity that dominates research framing to date. We attempted a systematic assessment of how background knowledge about nanotechnology may influence experts’ perception. Study 1 delivered the first demonstration derived from a qualitative analysis confirming the existence of a polarized representation of nanotechnologies, contrasting opportunity (medical, economic, and technological) and risk. Interestingly, risk was distinguished at two levels: that associated with nanomaterial characteristics (toxicity, reactivity) and at the larger scale of impact (health, environment, legislation). Does this polarity indicate a ‘yes, but’ logic (nanotechnology carries opportunity but also risk), or two clusters of specialists (sensitive, respectively, to opportunity or to risk)? Study 2 surveyed a larger sample of experts who self-described their scientific background and role viz. nanotechnology. Role had no influence. Specialists consensually viewed that nanotechnology represents opportunity, but depending on scientific background they did not agree to the same extent that nanotechnology also constitutes a risk. Participants with a physics and chemistry background tended to represent nanotechnologies predominantly in terms of opportunities and not in terms of inherent risks or impacts. In contrast, toxicologists, life and social scientists appeared to explicitly incorporate both benefits and risks in their representation of this new technology. Environmental scientists were a more diverse group, divided between the two patterns of representation.     

政府采购专家资源的整合与管理

现行政府采购制度引进专家评审机制,实现了政府经济支出行为的程序化和规范化。政府采购评审专家代表政府依法行使采购项目评审权利,对政府采购专家资源进行有效整合与管理成为政府采购活动中关键的一环。本文分析了我国政府采购专家资源的现状及存在问题,提出了组建专家库的方法和评审专家在项目前、中、后期的合理应用,并给出专家的考核管理办法。     

Generalized smooth finite mixtures

We propose a general class of models and a unified Bayesian inference methodology for flexibly estimating the density of a response variable conditional on a possibly high-dimensional set of covariates. Our model is a finite mixture of component models with covariate-dependent mixing weights. The component densities can belong to any parametric family, with each model parameter being a deterministic function of covariates through a link function. Our MCMC methodology allows for Bayesian variable selection among the covariates in the mixture components and in the mixing weights. The model’s parameterization and variable selection prior are chosen to prevent overfitting. We use simulated and real data sets to illustrate the methodology.     

Expert reports in Australian takeovers: fees and quality

Target firms in Australian takeovers are required to commission the preparation of an independent expert report in circumstances where there is a perceived conflict of interest with the bidder. As approximately half of these reports are prepared by firms with which the target has other business dealings, concern has been expressed over the quality of these reports due to the suggestion that such reports are provided at lower fees. We examine the 191 independent expert reports provided in all 649 Australian takeover bids initiated in the period 1990 to 2000 inclusive. Using an expert-fee model, we find that the fees for reports by experts with other business dealings with the target are not lower than those of unrelated experts. In addition, the results indicate that experts with other dealings with the target provide reports with a significantly smaller valuation range, consistent with these reports being of higher, rather than lower, quality. Our findings are inconsistent with the U.S. and New Zealand experience of prohibiting audit firms from providing valuation advice in takeovers.     

高校“专家进课堂”打造“中学明师”项目探析

华南师范大学专家组走基层,放下身段,带课题项目,来广州市花都区秀全中学,为中学青年教师提升课堂教学艺术,打造精品课堂,培养“明师”成长为“名师”,对中学的教育具有里程牌的意义,将高校理论研究的成果转变为中学教学中的精品课程,达到丰富的教学资源共享的目的.本文就此项目的实效进行简要分析.     

Goodwill valuations certified by independent experts: Bigger and cleaner impairments?

If firms disclose the use of independent valuation experts to assess the magnitude of goodwill impairments, should investors rationally condition their values on that disclosure? This research shows that firms that disclose the use of an independent valuation expert are more likely to report a higher impairment charge in an impairment year but, critically, after controlling for other determinants, the disclosing firms are less likely to have impairments in following years. Thus, when the use of an independent expert is disclosed, while it is rational for investors to downgrade firm value on the basis of the disclosed (higher) impairment charge in that year, there is simultaneously a reduced need to add an additional discount to anticipate further (strategically) delayed impairment charges. The investors need to consider the likely multi-period time series properties of impairments, and firms may benefit from using an expert if in anticipation of future related impairments, investors significantly reduce the discount applied.     

Do corporate boards matter during the current financial crisis?

This study examines the impact of corporate boards on firm performance during the current financial crisis. Using buy-and-hold abnormal returns over the crisis to measure firm performance, we find that board independence, as traditionally defined, does not significantly affect firm performance. However, when we redefine independent directors as outside directors who are less connected with current CEOs, a measure we call strong independence, there is a positive and significant relationship between this measure and firm performance. Second, outside financial experts are important for firm performance. We find that the positive impact of outside financial experts on firm performance is more significant than that of strong independence. Overall, our results suggest that firm performance during a crisis is a function of firm-level differences in corporate boards.