Bibliographischer Jahresbericht über Soziale Hygiene, Demographie und Medizinalstatistik, sowie Alle Zweige des Sozialen Versicherungswesen

At head of title, 1914/15- : Veröffentlichungen aus dem Gebiete der Medizinalverwaltung

Soziale Rundschau

Mode of access: Internet.

Soziale praxis : Zentralblatt fu r Sozialpolitik.

Editors: Apr. 1895 - Sep. 1897, I. Jastrow -- Oct. 1897- , E. Francke.

Soziale Revue; Zeitschrift für die sozialen Fragen der Geganwart.

Mode of access: Internet.

Die "Utopia" des Thomas Morus und die soziale Frage /

Thesis (doctoral)--Friedrich-Alexanders Universität Erlangen, 1904.

Die soziale und wirtschaftliche Lage der Bauern im Nurnberger Gebiet zur Zeit der Bauernkriege.

Thesis (doctoral)--Friedrich-Alexanders-Universitat Erlangen.

Die wirtschaftliche und soziale Bedeutung der Freilandrosenkult in Deutschland.

Thesis (doctoral)--Ruprecht-Karls-Universitat, Heidelberg.

Archiv für soziale Hygiene und Demographie

Mode of access: Internet.

Die soziale frage und der sozialismus, eine kritische auseinandersetzung mit der marxistischen theorie,

Mode of access: Internet.

Norm modifications in defeasible logic

This paper proposes a framework based on Defeasible Logic (DL) to reason about normative modifications. We show how to express them in DL and how the logic deals with conflicts between temporalised normative modifications. Some comments will be given with regard to the phenomenon of retroactivity.

Blur adaptation explained by a norm-based model of contrast adaptation

Adapting to blurred images makes in-focus images look too sharp, and vice-versa (Webster et al, 2002 Nature Neuroscience 5 839 - 840). We asked how such blur adaptation is related to contrast adaptation. Georgeson (1985 Spatial Vision 1 103 - 112) found that grating contrast adaptation followed a subtractive rule: perceived (matched) contrast of a grating was fairly well predicted by subtracting some fraction k(~0.3) of the adapting contrast from the test contrast. Here we apply that rule to the responses of a set of spatial filters at different scales and orientations. Blur is encoded by the pattern of filter response magnitudes over scale. We tested two versions - the 'norm model' and 'fatigue model' - against blur-matching data obtained after adaptation to sharpened, in-focus or blurred images. In the fatigue model, filter responses are simply reduced by exposure to the adapter. In the norm model, (a) the visual system is pre-adapted to a focused world and (b) discrepancy between observed and expected responses to the experimental adapter leads to additional reduction (or enhancement) of filter responses during experimental adaptation. The two models are closely related, but only the norm model gave a satisfactory account of results across the four experiments analysed, with one free parameter k. This model implies that the visual system is pre-adapted to focused images, that adapting to in-focus or blank images produces no change in adaptation, and that adapting to sharpened or blurred images changes the state of adaptation, leading to changes in perceived blur or sharpness.