In contemporary China, rural-urban migration takes place at a considerable scale. Due to its scale, as well as the particular context in which migration happens, studying the case of China can reveal important lessons on how policies can be designed to enhance positive impacts of migration on source communities. Relying on a review of literature from the fields of sociology, geography and econo...

Don Ross begins his recent book by explaining why he regards analytical philosophy of science as " a barren enterprise " (p. 1). Analytical philosophy of science (derived from the twentieth century analytical philosophy tradition) accords the philosopher special expertise in the 'logic of concepts' and thus a unique responsibility for determining universal norms of thought for the sciences. Thi...

Rho GTPases, including RhoA, Rac1 and Cdc42, are key regulators of cell migration in animals. In a recent issue of Nature, two papers present delicate studies on precise roles and spatiotemporal coordination of Rho GTPases in live cells, using either a photoactivatable Rac1 or specific biosensors, together with computational multiplexing method. In addition to implications in cell migration, an...

The response by trade unions to the question of migration has become a critical issue in the study of industrial relations. This represents an important turn around in the research agendas in Industrial Relations. This paper develops an analysis of how the trade union movement has understood and responded to the challenge of social inclusion and migration within three European contexts: The Net...

At present, no practical methodology exists for routine prediction of stream meander migration and uncertainty concerning the level of risk to infrastructure remains unacceptably high. This paper describes a Handbook that includes ArcView 3.2-based Bend Measurement and Channel Migration Predictor extensions, which provides a practical methodology to transportation engineers, floodplain managers...

Common-azimuth migration (CAM) is an attractive solution for 3-D prestack imaging. It reduces the full 5-D phase-shift operator to 4-D through the stationary-phase approximation, lowering the computational cost. However, this assumption yields constraints in the downward-continuation process that can limit accuracy. Those errors are estimated in this paper by comparison to other wave-equation m...

A fully nonlinear modal analysis identifies a critical centerline wave number q(c) for river meandering that separates long-wavelength bends, which grow to cutoff, from short-wavelength bends, which decay. Exact, numerical, and approximate analytical results for q(c) rely on the Ikeda, Parker, and Sawai [J. Fluid Mech. 112, 363 (1981)] model, supplemented by dynamical equations that govern the ...

Forensic science has been slow to develop as a recognised field of study. Over the past 30 years, analytical and forensic science have developed together; though the application of new analytical techniques in forensic work is retarded by the necessity of having methods of proven reliability. The many techniques now applied in forensic analysis—microscopy, spectroscopy of all types, x-ray analy...

Using gel filtration and preparative isotachophoresis, the migration inhibitory factor (MIF) was highly purified from human lymphocytes activated with concanavalin A. MIF is an acidic protein with a mol wt of approximately equal to 25,000 daltons as determined by gel filtration and analytical polyacrylamide gel electrophoresis in the presence of sodium dodecyl sulfate. The protein inhibits migr...

The International Congress on Analytical Chemistry was held in Japan, under the sponsorship of IUPAC and the Science Council of Japan in April 1972. This is a report on the progress of analytical chemistry in Japan which I gave as the opening lecture of the Congress, in commemoration of the 20th anniversary of the Japan Society for Analytical Chemistry. Analytical chemistry courses were first e...