Yuan Cheng

This book contains two review articles on nonlinear data assimilation that deal with closely related topics but were written and can be read independently. Both contributions focus on so-called particle filters.The first contribution by Jan van Leeuwen focuses on the potential of proposal densities. It discusses the issues with present-day particle filters and explorers new ideas for proposal densities to solve them, converging to particle filters that work well in systems of any dimension, closing the contribution with a high-dimensional example. The second contribution by Cheng and Reich discusses a unified framework for ensemble-transform particle filters. This allows one to bridge successful ensemble Kalman filters with fully nonlinear particle filters, and allows a proper introduction of localization in particle filters, which has been lacking up to now.

This masterly new study presents the first large-scale empirical analysis of the changes in British work experiences and employment relationships between the 1980s and 1990s. Drawing on the Employment in Britain surveya national survey providing the richest source of evidence to date about individuals' experience of employmentit examines the impact of new technologies, the emergence of new management policies, the changing forms of employment contract, and the growth of job insecurity on people's experience of employment. The authors focus on the implications these developments have for the ways in which skills and work tasks have been changing, the nature of control at work, the degree of participation in decision-making, and the flexibility demanded at work. They assess whether there has been a tendency towards either a polarization or convergence of employment experiences between men and women, and between occupational classes. They offer fresh insight into how the changing quality of work in recent years has affected employee's involvement in their jobs and organizations, the stress they experience at work, and the propensity for absenteeism and staff turnover. While the study provides strong evidence of a marked trend towards upskilling, the authors take issue with the argument that a new type of employment relationship is emerging, arguing instead that the restructuring of the employment relationship has, in fact, reinforced traditional lines of division in the workforce.

This masterly new study presents the first large-scale empirical analysis of the changes in British work experiences and employment relationships between the 1980s and 1990s. Drawing on the Employment in Britain surveya national survey providing the richest source of evidence to date about individuals' experience of employmentit examines the impact of new technologies, the emergence of new management policies, the changing forms of employment contract, and the growth of job insecurity on people's experience of employment. The authors focus on the implications these developments have for the ways in which skills and work tasks have been changing, the nature of control at work, the degree of participation in decision-making, and the flexibility demanded at work. They assess whether there has been a tendency towards either a polarization or convergence of employment experiences between men and women, and between occupational classes. They offer fresh insight into how the changing quality of work in recent years has affected employee's involvement in their jobs and organizations, the stress they experience at work, and the propensity for absenteeism and staff turnover. While the study provides strong evidence of a marked trend towards upskilling, the authors take issue with the argument that a new type of employment relationship is emerging, arguing instead that the restructuring of the employment relationship has, in fact, reinforced traditional lines of division in the workforce.