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[1] We investigate the effects of the porosity (and thus permeability) of porous matrix and the fracture aperture on transport in fractured porous media. We do so with detailed lattice Boltzmann simulations on constructed porous media with a single fracture. Both plume spatial moments (the average plume velocity and the dispersion coefficients) and mass transfer coefficients between the facture...

By J. D. HaUoran (Leicester University Press, 7s. 6d.) Mr. Halloran's working paper prompted me to look up the record of that seminal conference on "Popular Culture and Personal Responsibility" which the National Union of Teachers organised five years ago, to see whether much progress has been made since. Stanley Reed, of the British Film Institute, said then that it was amazing how little we k...

BACKGROUND Media utilization has been identified as an important determinant of tobacco use. We examined the association between self-reported tobacco use and frequency of mass media utilization by women and men in nine low-to middle-income sub-Saharan African countries. METHODOLOGY/PRINCIPAL FINDINGS Data for the study came from Demographic and Health Surveys conducted in Burkina Faso, Ethio...

Using cross-national time-series data in sequences of Granger causality tests, this study analyzed the democratic effects of media technologies with a sample of 122 countries. This process revealed that communication technologies are vital, but not exclusive or universal prerequisites of democratic growth. As expected by media system dependency (MSD) theory, media diffusion was shown to have Gr...

The aim of the present study is to analyze the types of leisure time spending among the students of the IAY of Ardestan Branch. In a descriptive method of study a researcher-made questionnaire was used for gathering the data. The Alpha Cronbach coefficient was 86% and six hypotheses were applied for the time of participation in sport activities. Mass media, participation at activities, studying...

Program development processes for the Television, School, and Family Project, a school-based smoking prevention and cessation project, are presented in this article. We first review applications of social-psychological and communications theory to school-based and mass media program development. These include the three broad areas of (a) mediators of mass media effects on behavior change, (b) t...