Residents′Activity-travel Behavior Variation by Communities in Beijing,China

China's transition from a planned economy to a market economy has resulted in many changes in its urban structure and society and provided an opportunity for a quasi-longitudinal case study on the relationship between the built environment and activity-travel behavior.This paper draws upon data from an activity diary survey conducted in Beijing in 2007.The survey sample comprised 652 residents living in Danwei(work unit),commodity housing,and affordable housing neighborhoods.On the basis of the three-dimensional geo-visualization analysis of the space-time path and statistical multivariate regression models of daily travel and leisure time,it was found that both residential spatial factors and socio-demographics influence residents' daily behaviors.The findings show that Danwei residents have less daily travel time than those who live in commodity housing,but people living in affordable housing endure the longest travel time.Daily leisure time is associated more with individual attributes.We argue that although China's transition is currently gradual,the Danwei system may continue to play significant roles in daily life,and it might provide a valuable model for neighborhood spatial planning.

Derivation of Plastic Work Rate Done per Unit Volume for Mean Yield Criterion and Its Application

In Haigh Westergaard stress space linear combination of twin shear stress and Tresca yield functions is called the mean yield （MY） criterion. The mathematical relationship of the criterion and its plastic work rate done per unit volume were derived. A generalized worked example of slab forging was analyzed by the criterion and its corresponding plastic work rate done per unit volume. Then, the precision of the solution was compared with those by Mises and Twin shear stress yield criterions, respectively. It turned out that the calculated results by MY criterion were in good agreement with those by Mises criterion.

The Organizational Working Conditions from a Governance Perspective:An Analytical Framework

To pursue high-quality development,China needs to create new working conditions for workers to improve the quality of their work."Working conditions"refers to the kind of working climate and state that people perceive in their organizations,a perception will have an important impact on their organizational behavior.Improving the working conditions of an organization is actually a social process of organizational governance.In observing organizational working conditions from a governance perspective,it is necessary to take into consideration"embeddedness"as a structural background and the work unit(danwei)as an institutional vehicle.It is imperative to emphasize both organizational order and the subjective perceptions of individuals.It also essential to analyze the organization’s social solidarity,its contlicts and integration and its protections and inclusion,the participation of its members,their interaction and the structure of their roles,and the organization’s structure and functions.This analytical framework provides a more comprehensive picture of organizational governance,which in turn reflects the organization’s working conditions and provides insights into overall research and dialogue in the disciplinary field of working conditions.