Understanding preventive behaviors among mid-Western African-American men: a pilot qualitative study of prostate screening

http://dx.doi.org/10.1016/j.jomh.2011.03.00

Area-wide appraisal of drug resistance in trypanosomes infecting cattle in East and Southern Africa

The extent and significance of trypanocidal drug resistance was investigated in priority areas of three East and Southern African Countries under a project. The project was built on the results of two previous projects. Existing methods currently available for the demonstration of drug-resistance, namely therapeutic tests in domestic livestock and rodents, and tests on trypanosome isolates in vitro, have particular drawbacks. In this project, these were supplemented with a novel approach, the use of ELISAs able to quantify the concentrations of trypanocidal drugs circulating in treated cattle

Fluctuation scaling and covariance matrix of constituents’ flows on a bipartite graph

We investigate an association between a power-law relationship of constituents’ flows (mean versus standard deviation) and their covariance matrix on a directed bipartite network. We propose a Poisson mixture model and a method to infer states of the constituents’ flows on such a bipartite network from empirical observation without a priori knowledge on the network structure. By using a proposed parameter estimation method with high frequency financial data we found that the scaling exponent and simultaneous cross-correlation matrix have a positive correspondence relationship. Consequently we conclude that the scaling exponent tends to be 1/2 in the case of desynchronous (specific dynamics is dominant), and to be 1 in the case of synchronous (common dynamics is dominant)