Empirical behavior of some tests for normality

The behavior of a range of tests assessing the normality of a sequence of independent and identically distributed random variables is investigated.An examination of the empirical significance level of the tests is undertaken for different sample sizes. The empirical power associated with these tests is also calculated under some alternative distributions.     

抗日战争时期在中日两国的美国传教士作用之比较

本文通过对美国赴华与赴日传教士团体的比较研究,认为赴华美国传教士及其子弟在中国和美国本土两线都积极而成功地影响了美国的东亚政策,从而密切了当时的中美关系并推动了抗日战争的顺利发展.相对于此,赴日美国传教士所发挥的作用是微妙和复杂的.同时,本文还通过对传教士历史功能分析模式的再探讨,揭示了传教士在特殊历史时期所扮演的"外交"、"宣传"角色背后的深层蕴含.     

Improving communication via quantitative management

Villa Soft Drinks Ltd, established in 1884, manufactures and bottles spring waters and carbonates for both the growing adult soft drinks market and the more traditional soft drinks market. The company employs just over 100 people split between the manufacturing site in Sunderland and the head office and distribution centre in Washington. One of the fundamental problems affecting the day-to-day running of Villa, and most companies, is communication. There is a lack of awareness of the impact that changes in one department have on other departments (e.g. if production efficiency is increased by 10%, what impact will this have on warehousing?). Villa had recently identified key performance indicators (KPIs) to monitor all aspects of manufacturing performance on a regular basis. This enabled the current production situation to be evaluated and helped familiarize staff with charts and measurements. The use of Pareto analysis and problem solving techniques helped to boost efficiency and utilization. Key performance indicators were then developed in most other departments and are monitored and displayed regularly. The KPIs can be used further to improve transparency across the company by incorporating them in an interactive, interpretative tool to aid communication and understanding at all levels of the company. Individual departmental flow diagrams will be linked together to represent how the company operates. The diagrams will include both material flow and information flow. These data will then be organized in a software package and the end result will be a fully integrated simulation of the company in which any variable can be altered to demonstrate the effect this has on other departments and therefore the company as a whole. This will be an extremely valuable tool for the company as it will have many different applications, such as calculating manning requirements, identifying potential cycle time reductions and optimizing warehouse space.     

Max-stable processes for modeling extremes observed in space and time

Max-stable processes have proved to be useful for the statistical modeling of spatial extremes. For statistical inference it is often assumed that there is no temporal dependence; i.e., that the observations at spatial locations are independent in time. In a first approach we construct max-stable space–time processes as limits of rescaled pointwise maxima of independent Gaussian processes, where the space–time covariance functions satisfy weak regularity conditions. This leads to so-called Brown–Resnick processes. In a second approach, we extend Smith’s storm profile model to a space–time setting. We provide explicit expressions for the bivariate distribution functions, which are equal under appropriate choice of the parameters. We also show how the space–time covariance function of the underlying Gaussian process can be interpreted in terms of the tail dependence function in the limiting max-stable space–time process.     

Child Aggression as a Source and a Consequence of Parenting Stress: A Three‐Wave Longitudinal Study

This longitudinal study examined the links between child aggression and parenting stress over 4 years. Child aggression was hypothesized to contribute to parenting stress, which should increase aggression. Parents and teachers of 239 German children aged between 6 and 15 years completed measures of child aggression at Time 1 and Time 3, complemented by children's self‐reports of aggression at Time 3. Parents rated their child‐focused and parent‐focused stress at an intermediate measurement Time 2. Child‐focused stress mediated the path from Time 1 to Time 3 aggression in boys and girls, whereas parent‐focused stress was unrelated to Time 3 aggression. The findings help to understand the continuity of aggressive behavior in childhood and adolescence and highlight the need to intervene early with families susceptible to parenting stress.