An essentially complete class of multiple decision procedures

Let π₁,…, π_k represent k(?2) independent populations. The quality of the ith population π_i is characterized by a real-valued parameter θ_i, usually unknown. We define the best population in terms of a measure of separation between θ_i's. A selection of a subset containing the best population is called a correct selection (CS). We restrict attention to rules for which the size of the selected subset is controlled at a given point and the infimum of the probability of correct selection over the parameter space is maximized. The main theorem deals with construction of an essentially complete class of selection rules of the above type. Some classical subset selection rules are shown to belong to this class.     

Saturated designs for multivariate cubic regression

This paper deals with the problem of finding saturated designs for multivariate cubic regression on a cube which are nearly D-optimal. A finite class of designs is presented for the k dimensional cube having the property that the sequence of the best designs in this class for each k is asymptotically efficient as k increases. A method for constructing good designs in this class is discussed and the construction is carried out for 1?k?8. These numerical results are presented in the last section of the paper.     

Block designs with block size two

Algorithms are given for the construction of binary block designs with replications and concurrences differing by at most one. The designs are resolvable and/or connected wherever the parameters permit.     

新课改下民族地区中小学教师对教师教育课程改革意见的调查

目的：了解中小学优秀教师在新课改下对高师教师教育相关问题的认识、感受以及对高师教师教育课程体系改革的意见,探讨新课改下,高师教师教育课程的设置;方法运用自编问卷,对250名凉山民族地区中小学优秀教师进行调查;结果中小学优秀教师对高师教师教育课程设置的意见主要集中于五个方面：第一、教师思德素质的培养;第二、教学实践课程的增加;第三、教师技能的训练;第四、研究性教学的强化;第五、开设民族文化基础选修课程.结论中小学优秀教师对高师教师教育的建议,对于我们当前教师教育的课程设置,教育教学方法的改革有着重要的参考价值.     

How do vulnerable youth complete secondary education? The key role of families and the community

This article demonstrates how the engagement of families and other community members in decision-making processes in a school may prevent early school leaving among vulnerable youth and simultaneously increase their enrolment in secondary education. Based on a large-scale, EU-funded study, this article focuses on the case of one school located in a deprived area inhabited mainly by Roma people – one of the vulnerable populations most affected by early school leaving – where a specific egalitarian participatory process of Roma families was implemented. According to the analysis of the collected data, this participation contributed to a reduction in student dropout rates during primary education, led to the implementation of compulsory secondary education in the same school, and increased the numbers of students who graduated from secondary school. These achievements transformed the educational and social prospects of vulnerable youth who were following the path to failure and who now dream of continuing their studies. Furthermore, these youth are acting as role models for younger children in primary education, helping to prevent school dropout and early school leaving from early ages. The case shows how the community participation in decision-making processes transformed the climate and expectations regarding education in the neighbourhood.     

On the comparison of the pre-test and shrinkage estimators for the univariate normal mean

The estimation of the mean of an univariate normal population with unknown variance is considered when uncertain non-sample prior information is available. Alternative estimators are defined to incorporate both the sample as well as the non-sample information in the estimation process. Some of the important statistical properties of the restricted, preliminary test, and shrinkage estimators are investigated. The performances of the estimators are compared based on the criteria of unbiasedness and mean square error in order to search for a ‘best’ estimator. Both analytical and graphical methods are explored. There is no superior estimator that uniformly dominates the others. However, if the non-sample information regarding the value of the mean is close to its true value, the shrinkage estimator over performs the rest of the estimators. Received: June 19, 1999; revised version: March 23, 2000     

三位一体教学改革实验报告

提高升学率与减轻学生学习负担,一直是困扰普通高中开展素质教育的一个两难问题.郑州一高自1993年至1996年进行了提高课堂教学效率,减轻学生负担;培养学生自学习惯与能力;开设第二课堂,发展学生特长的三位一体教学改革实验.实验结果表明其不失为重点高中实施素质教育的有效途径.     

Two sample inference in functional linear models

We propose a method of comparing two functional linear models in which explanatory variables are functions (curves) and responses can be either scalars or functions. In such models, the role of parameter vectors (or matrices) is played by integral operators acting on a function space. We test the null hypothesis that these operators are the same in two independent samples. The complexity of the test statistics increases as we move from scalar to functional responses and relax assumptions on the covariance structure of the regressors. They all, however, have an asymptotic chi‐squared distribution with the number of degrees of freedom which depends on a specific setting. The test statistics are readily computable using the R package fda , and have good finite sample properties. The test is applied to egg‐laying curves of Mediterranean flies and to data from terrestrial magnetic observatories. The Canadian Journal of Statistics © 2009 Statistical Society of Canada     

A mixed-methods study of CEO transformational leadership and firm performance

This mixed-methods study explores the relationship between CEO transformational leadership and firm performance relying exclusively on secondary data. We used a random sample comprising of 42 CEOs of publicly-listed US and European companies. We evaluated their transformational leadership drawing upon media sources which were content analyzed to create individual CEO profiles. These profiles were then given to a panel of three judges who rated the CEOs on their transformational leadership style. We obtained the firm performance data from Thomson Datastream. Our results showed significant associations between intellectual stimulation and inspirational motivation respectively, and different financial performance indicators. We also observed a tendency of positive relationships between individualized consideration and firm performance. These findings remained significant after controlling for company baseline performance, firm size, CEO tenure, and company location. Our findings largely support the positive role of CEO transformational leadership in shaping firm performance.     

Secondary traumatic stress and self-care inextricably linked

ABSTRACT

Increasingly trauma scholars are exploring the susceptibility of mental health providers to secondary trauma reactions. The current study explores the relationship between clinical social work practice with trauma-exposed clients and secondary traumatic stress among social workers. The intent of this study is to identify the role various factors play in the development of secondary trauma (also known as compassion fatigue). A simple random sample of National Association of Social Workers members were asked to participate. Participants completed an online survey that explored their exposure and responses to secondary traumatic stress. The online survey consisted of standardized measures including the Secondary Traumatic Stress Scale and The Coping Strategies Inventory which assesses secondary trauma and self-care strategies, respectively (Bober, Regehr, & Zhou, 2006; Bride, Robinson, Yegidis, & Figley, 2003). The magnitude of work (the extent and intensity of time working with trauma-exposed clients) is assessed by a non-standardized measure which consists of clinical caseloads composition questions. Job satisfaction is measured by items taken from the National Association of Social Workers’ workplace questionnaire (Whitaker & Arrington, 2008). 161 social workers completed the online survey. It required approximately 35 minutes to complete. This project empirically demonstrated that high-magnitude social work practice (providing therapeutic intervention to trauma survivors, i.e. military service members and veterans) is associated with higher levels of secondary trauma. There is also empirical evidence that self-care strategies can mitigate the impact of the secondary trauma. Educational and workforce implications for study findings are discussed.