We use newly developed methods of measuring spatial segregation across a range of spatial scales to assess changes in racial residential segregation patterns in the 100 largest U.S. metropolitan areas from 1990 to 2000. Our results point to three notable trends in segregation from 1990 to 2000: (1) Hispanic-white and Asian-white segregation levels increased at both micro- and macro-scales; (2) ...

Rheo-diecasting with electro-magnetic stirring has been carried out to investigate macro-segregation and microstructural characteristics of a high strength Al­Si­Mg alloy under various process conditions. The amount of initial heterogeneous nucleation and the degree of temperature uniformity in the slurry are dependent on the superheat of the melt at pouring into the slurry making vessel. The f...

A Ni-based superalloy CMSX-6 was directionally solidified at various drawing speeds (5–20 μm·s−1) and diameters (4 mm, 12 mm) under a 0.5 T weak transverse magnetic field. The results show that the application of a weak transverse magnetic field significantly modified the solidification microstructure. It was found that if the drawing speed was lower than 10 μm·s−1, the magnetic field caused ex...

From the Schelling model of segregation, we derive models of group formation that shed light on segregation or mixing patterns observed in spatial grid networks. Individuals have types and see type-dependent benefits or drawback from theirs neighbours: this leads each one to be attracted or repulsed by its own like or unlike. This framework allows to studying many spatial phenomena that involve...

Residential segregation is an explicitly spatial phenomenon that emerges from the interaction of many individuals and displays markedly different global patterns depending on specific socioeconomic contexts. This paper presents a generative model of socioeconomic segregation that reproduces regular macro-level patterns of the phenomenon through the specification of a minimal set of parameters t...

This paper focuses upon recent annual national trends in racial segregation in professional occupations which are based on Current Population Survey (microdata) occupationand industry-specific distributions of employed black and white professionals for 1968-1979. Annual changes in the patterns of these trends are descripti~ely analyzed with the objective of exposing their implications to constr...

Abstract During the solidification of binary metal alloys, chemical heterogeneities at product scale over a long distance range (1cm-1m) develop and this has detrimental effect on the resulting mechanical properties of cast products. Macrosegregation is of great concern to alloy manufacturers and end users as this problem persist. In this study, the use of process parameters namely casting spee...

This introduction to the special issue “Social Integration in Later Life” addresses the background ideas and concepts of the articles encompassing research into the extent and quality of older adults’ integration in organizations, family, and personal networks. A rough conceptual framework is provided, distinguishing between types of integration and different units of analysis. The macro level ...

Channel segregation, which is featured by the strip-like shape with compositional variation in cast materials due to density contrast-induced flow during solidification, frequently causes the severe destruction of homogeneity and some fatal damage. An investigation of its mechanism sheds light on the understanding and control of the channel segregation formation in solidifying metals, such as s...

The census tract-based residential segregation literature rests on problematic assumptions about geographic scale and proximity. We pursue a new tract-free approach that combines explicitly spatial concepts and methods to examine racial segregation across egocentric local environments of varying size. Using 2000 census data for the 100 largest U.S. metropolitan areas, we compute a spatially mod...