原子簇的合成方法、性质表征与结构

利用给电子有机和无机配位体的交换反应和金属卤化物与羰基金属阴离子的复分解反应,合成异核原子簇具有反应条件温和易于控制,收率较高的特点。本文描述Fe_3(CO)_9(C_2H_2)_3等11个原子簇的合成方法,配位状态与簇核的结构。     

The role of social work in the ICU: reducing family distress and facilitating end-of-life decision-making

The costs associated with Intensive Care Units (ICUs) are high and at times invasive ICU care may not be beneficial, particularly for those patients admitted to ICUs who have little hope of recovery. The process of clarifying medical goals for these patients is often facilitated by addressing psychosocial factors. Social workers in the ICU are uniquely qualified to assess and address many of the complex psychosocial circumstances and can clarify potential misperceptions, enhancing communication among patients (if capacitated), their families, and the medical team members. This can not only help improve quality of life for very sick and dying patients in the ICU and their families, but may also reduce the likelihood of decision-making conflicts from arising. Further studies need to be done to investigate the effectiveness of social work interventions in reducing family distress, avoiding care that is unwanted by patients, and demonstrating cost-saving benefits.     

A Survey of the Teaching of Statistics in M.B.A. Programs

A survey of business schools was conducted to obtain information about the current state of the teaching of business statistics to students enrolled in M.B.A. degree programs. The survey was undertaken for and presented at a June 1986 conference on “Making Statistics More Effective in Schools of Business,” held at the University of Chicago's Graduate School of Business. Information was elicited concerning both the required statistics sequence and elective statistics courses for M.B.A. students, as well as computer usage in these courses. This article summarizes the information obtained from the survey.     

Developing “A Framework for Planning U.S. Federal Statistics, 1978–1989”

The Statistical Policy Division of the Office of Management and Budget has the overall responsibility for the planning and coordination of U.S. government statistics. The present staff of the Statistical Policy Division is attempting, through an integrated publication entitled “A Framework for Planning U.S. Federal Statistics, 1978–1989,” to state its perspective on necessary developments in the coming years. This article illustrates the character of the Framework materials and outlines the process for public review and comment on this undertaking.     

A robust test for asymptotic independence of bivariate extremes

We show that the existing tests for asymptotic independence are sensitive to outliers. A robust test is proposed. The new test is made stable under contamination through a shrinkage scheme. Simulations show that the new test performs well in the presence of contaminated data while maintaining good properties when there is no contamination. An application to real data shows the added value of our new robust approach.     

Exploring Rotation Placements for Social Work: A Focus on Student and Supervisor Experiences

Increasing demand for social work placements in a climate of decreasing availability has intensified the search for capacity-building models of field education. Rotation placements may be part of the solution, yet little is currently known about how rotations affect the experience of field education in the context of block placements. A study of 128 Master of Social Work (MSW) students and 92 supervisors provided insights into the experience of rotation placements in five Australian hospitals. The study adopted a mixed-methods design using online surveys followed by postplacement interviews over 3 years. The findings show that experiences were mixed. However, there were also some common themes that help inform what might work, for whom, and under what circumstances.     

A Demographic Model of Measles Epidemics

Liverpool, U.K., 1863--1900, has been used as a model to explore the interaction between measles epidemics and the population dynamics in an overcrowded community with inadequate nutrition using a non-linear model which allows the estimation of certain underlying demographic parameters. The results are consistent with a system that is driven by an oscillation in the transmission parameter that is compounded of an oscillation in autumn temperatures (at the resonant frequency of the system, 2.4 years) and, secondarily, by an oscillation in wheat prices (wavelength = 5.3 years, twice that of the epidemics).