L'Intervention Sociologique After Twenty-Five Years: Can It Translate into English?

The sociological intervention is a research method developed in France by Alain Touraine in 1976 to explore social movement action. Since then it has undergone significant development, both in terms of the type of social experience explored and the broader research program framing it. Despite its importance, the intervention remains little known and virtually untested within English-language sociology. This article examines key dimensions of this research method through discussing several examples, and argues that the intervention has much to offer English-language sociologists concerned with questions of agency and reflexivity, relationship, narrative and experience.     

Concepts and measures for skewness with data-analytic implications

The decomposition of the distribution function into skewness and spread functions serves as a basis for conceptualizing the skewness of a random variable. Measures of skewness are also described in terms of the skewness and spread functions, thereby unifying the measures with the concepts. Results that relate these measures to whether one random variable is more skewed than another are reviewed and extended. Graphical displays are presented for uncovering the nature of the skewness of a variable. The measures are also linked to the issue of symmetrizing a variable.     

LOG-PERIODOGRAM ESTIMATION OF LONG MEMORY VOLATILITY DEPENDENCIES WITH CONDITIONALLY HEAVY TAILED RETURNS

Many recent papers have used semiparametric methods, especially the log-periodogram regression, to detect and estimate long memory in the volatility of asset returns. In these papers, the volatility is proxied by measures such as squared, log-squared, and absolute returns. While the evidence for the existence of long memory is strong using any of these measures, the actual long memory parameter estimates can be sensitive to which measure is used. In Monte-Carlo simulations, I find that if the data is conditionally leptokurtic, the log-periodogram regression estimator using squared returns has a large downward bias, which is avoided by using other volatility measures. In United States stock return data, I find that squared returns give much lower estimates of the long memory parameter than the alternative volatility measures, which is consistent with the simulation results. I conclude that researchers should avoid using the squared returns in the semiparametric estimation of long memory volatility dependencies.     

国有股减持方式比较分析

上市公司的情况千差万别 ,应根据行业特征和不同的股本结构 ,不同的资产质量 ,不同的财务状况分别采取不同的国有股减持方式。主要有 :配售、存量发行、拍卖、协议转让、控股、回购、可转换债券、股权转债权、职工持股减持国有股、普通股变化优先股、票息回构转质等国有股减持方式。     

A technique for comparing graphical methods

The problem of assessing the merit of a technique for displaying data is addressed. The divergence, a measure of the difference between two graphs, is introduced and its properties discussed. The performance of the divergence is investigated by Monte Carlo methods. Two applications of the divergence are presented.     

Judgment and Analysis in Oil Spill Risk Assessment

The risk of oil spills is a major environmental issue in the siting of proposed coastal refineries, oil terminals, deepwater ports, and in the leasing of offshore lands for oil exploration and development. As with any kind of risk, oil spill risk assessment is inherently judgmental and no analytic method can eliminate the need for judgment. This paper compares representative examples of oil spill risk assessments with regard to decisions about data, variables, functional relations, and uncertainty. The comparison emphasizes the judgmental basis of analytic methods.     

A Method for Estimating Lifetime Cancer Risks from Limited Epidemiologic Data

Partly because of the poor quality of exposure information on humans, most lifetime carcinogenic risk assessments have been based on animal data. There are, however, surrogate measures for exposure that have not been fully utilized. One of these is duration of exposure where data on mean exposure levels are available. A method is presented for the use of such data, and the method is illustrated by developing a risk assessment from the available epidemiologic literature on gasoline and kidney cancer. This risk assessment is fairly consistent across studies and close to a risk assessment based upon an experiment with rats. While there needs to be much improvement in the quality of environmental data available to epidemiologists, it is possible that a number of risk assessments can be made from existing epidemiologic data and efforts directed away from extrapolation from animal data.     

Whose attitudes to which aspects of work? or Cool media for high participation

Current approaches to the assessment of job attitudes—for use in job redesign—seem to centre upon the importance of job characteristics, such as those within the Job Characteristics Model. Data collection is largely through well-founded, repeatable, formal questionnaires. It is argued that a broader, ergonomics perspective is required, stressing the importance of job holders' attitudes to the technology being used, the physical environment and workplace, and procedures in support of work, such as training. Furthermore, if we wish to promote the participation of those whose work is being redesigned, the traditional and scientifically respectable questionnaire may not be the correct instrument. Data gathered by means of informal semi-structured discussion may better reflect the concerns and priorities of the people doing the work. Perhaps, to paraphrase Marshall McLuhan, formal job attitude instruments used alone are 'hot media', in the sense of being well-filled with data but low in participation. Informal discussion methods could be seen then as a 'cool medium', high in participation or completion by the audience (McLuhan 1964, pp. 22-23).     

2-D FIR数字滤波的一种新结构(英文)

对2-D FIR数字滤波提出了一种有效的VLSI算法和实现结构,该算法结构在实现上大大减少了乘法器和延迟器的数目,因而有着广泛的应用前景。     

工程工作站在卡车耐撞性分析中的应用

简要论述了汽车耐撞性解析的基本方程及计算方法。以一轻型卡车为例,结合计算方法讨论了工程工作站(Engineering Workstation)在卡车耐撞性解析中应用的几个问题。介绍了一种适合于工程工作站的接触面设定方法。最后给出了一个数值模拟结果。