选择试剂容器减少废液处理费用以提高实验效率和质量

实验室科学家用于完成研究的工作时间是有限的。在如今现代化、实验仪器密集的实验室里,每年用于一位科学家和实验室场地的开销可能超过＄250000或＄120/h。由于完成研究的成本高,而且时间有限,因此需要考虑许多因素来最优化的利用科学家时间。这篇文章以一个实际调查为例讨论了如下因素,包括实验室工作流程,高效液相色谱(HPLC)分离中的溶剂质量以及如何避免重复性工作,如何使用简单自动化设备来监测实验状态从而除去多步骤和减少工作频率以节省科学家的时间。当将所有小细节纳入考虑范围中时,因节省细碎的时间而对实验成本的节约和实验效率的提升具有非常重要的潜在影响。     

Bias Correction in the Type I Generalized Logistic Distribution

Four strategies for bias correction of the maximum likelihood estimator of the parameters in the Type I generalized logistic distribution are studied. First, we consider an analytic bias-corrected estimator, which is obtained by deriving an analytic expression for the bias to order n ^?1; second, a method based on modifying the likelihood equations; third, we consider the jackknife bias-corrected estimator; and fourth, we consider two bootstrap bias-corrected estimators. All bias correction estimators are compared by simulation. Finally, an example with a real data set is also presented.     

Asymptotic efficiency of a competing risks model: A two-sample case

A generalized Cox regression model is studied for the covariance analysis of competing risks data subject to independent random censoring. The information of the maximum partial likelihood estimates is compared with that of maximum likelihood estimates assuming a log linear hazard function.The method of generalized variance is used to define the efficiency of estimation between the two models. This is then applied to two-sample problems with two exponentially censoring rates. Numerical results are summarized ane presented graphically.The detailed results indicate that the semi-parametric model wrks well for a higher rate of censoring. A method of generalizing the result to type 1 censoring and the efficiency of estimating the coefficient of the covariate are discussecd. A brief account of using the results to help design experiments is also given.     

Learning Style Characteristics of Adult Dependent Decision Makers: Counseling and Instructional Implications

Dependent decision makers form a significant population of students and adults who seek help from career counselors. This study investigated the learning style characteristics of dependent decision makers in an urban community college setting. The results suggest that the dependent decision makers as a group may have reduced motivation for learning, show limited persistence, and take less responsibility for their learning. Because of these learning style characteristics, we recommend that these characteristics be considered when making counseling interventions and instructional modifications when working with dependent decision makers.     

Company Performance,Corporate Governance,and CEO Compensation in Norway and Sweden

This paper examines the relationshipamong company performance, corporategovernance arrangements, and CEO compensationwithin the Scandinavian countries of Norway andSweden. Our sample consists of 224 tradedcompanies, 120 of which are from Norway and 104from Sweden. The empirical evidence fromboth Norway and Sweden reveals significantpositive relationships among board size andCEO compensation, foreign board membership andCEO compensation, and market capitalization andCEO compensation. A significant negativerelationship is found between CEO ownership andCEO compensation. In addition, no significantrelationship is found between companyperformance and CEO compensation or CEO tenureand CEO compensation, except in the case ofNorwegian firms when a change in market-to-bookperformance measure is used. Despite itslimited geographical scope, the study adds toour general understanding of internationalcorporate governance issues.     

THE NEIGHBORING FIELD OF BRIEF INDIVIDUAL PSYCHOTHERAPY*

The author presents the field of brief individual psychotherapy as a coherent set of conventions, despite its diverse origins in the schools or traditions of dynamic, behavioral, interpersonal or cognitive, and strategic psychotherapy. He proposes the advantages of these shared conventions, but also their drawbacks. He proposes how this neighboring field could help the field of family therapy reduce its errors.     

World Class Manufacturing: Further Evidence in the Lean Production Debate1

This paper reports the results of a study into the performance and management practices of 18 autocomponents plants, nine of which were located in the UK and nine in Japan. The study compared the performance of these plants and used quantitative measures to test the use of lean production techniques among the high performers. Five plants displayed high performance on measures of both productivity and quality. All of these were located in Japan. Several measures of management practice provided some support for the lean production model, particularly in the area of process discipline and control; measures of human resource management policy and work organization proved less significant. Contextual factors pointed to the conditions necessary to support lean production; higher performing plants had more stable demand and lower absenteeism.