First results from the modular multi-channel dispersion interferometer at the TEXTOR tokamak.

At the TEXTOR tokamak in Jülich, Germany, a modular dispersion interferometer was installed and operated for the first time. Equipped with four lines of sight, the line-integrated density could be measured in parallel at different major radii with a resolution of better than 3 × 10(17) m(-2). This paper will describe the setup and show the first measurement results. Among others, it was possible to detect the evolution of a disruption with a time resolution of 4 µs. The movement of the runaway beam following the disruption could be resolved spatially and temporarily.

[Children and their television watching habits. A comparative study in rural and urban environments. Considerations on the effects]. / El niño y sus hábitos al ver televisión. Estudio comparativo en medio rural y urbano. Consideraciones sobre sus efectos.

In order to establish differences among television watching habits, surveys were conducted in a group of 80 children; 40 from rural areas and another 40 from the urban area, who were attending elementary school at the time. The children were randomly selected; their responses were compared to a national and local listing of television programs, excluding those which were contradictory. Both groups of children spent the same amount of time at school (P = Not significant) while the urban group spent an average of 3.5 hours watching television and the rural group spent 2.3 hours (P = 0.001). Thirty percent of the children from the urban area watched TV with an adult while those from the rural zone were accompanied in 32% (P:NS). The number of television sets per home was significantly greater in the urban areas (P = 0.001). All of the children watched programs which were transmitted after 9 p.m. Both groups chose unneeded food commercials as their favorite programs (P = Not significant).