In addition to fights at particular front-lines, war conflicts influence the otherwise quite calm life in the hinterland areas as well. This manifests itself not only in material poverty of the people living in the hinterland areas, but also by infringements of close and wider family relationship. The young men, who must go fighting, leave at home not only their parents, grand-parents, brothers and sisters and other relatives, but very often also their girl-friends, fiancées, wives as well as children. No one of them knows whether they will meet again. This is a big intrusion into existing and possible future family relations, of course.
On a particular example, the text follows two young people separated by the call-up order during World War I (in spring 1915), their fates, better said how their fates were passed on in family memories within the space of almost one century, namely from the World War I up to the outset of the 21st century. The reflexion of this family story passed down from generation to generation in its basic outlines, showed itself in a quite different light after almost one hundred years, than it was passed on through family gatherings and repeated narrations over a long period.
We evaluate the radiation and gravitational forces on dust grains out of the disk for a large sample of spiral galaxies. The main results are a selective expulsion of grains and the presence of equilibrium positions inside the halo, providing a new test for the distribution of dark matter.
Critical analysis of the results of space experiments, taking into account the contributlon of large particles to the total mass production of comet Halley leads to much higher values of the dust production rate than those derived from the first analysis of space measurements. As a consequence it seems necessary to correct the gas to dust ratio of the mass production by a factor of 10, from 0,1-1,0 to 1.0-10. The corrected values of dust production rate are in much better agreement both with the current concepts of the comeťs history and wlth the evolution of Its meteor stream.