Psychologie im Umweltschutz - Handbuch zur Förderung nachhaltigen Handelns

Ob wir uns vegetarisch ernähren, Fahrrad fahren oder eine Solaranlage bauen: Fortwährend treffen wir Entscheidungen im Sinne der Umwelt - oder auch nicht. Was uns dabei leitet und motiviert, erforscht die Umweltpsychologie. Das Handbuch der Psychologie im Umweltschutz erklärt anhand eines psychologischen Modells, wie wir nachhaltiges Handeln besser verstehen und fördern können. Als erstes deutschsprachiges Werk fasst es den Wissensschatz der angewandten Umweltpsychologie wissenschaftlich fundiert und praxisnah zusammen. Wichtige Themen wie Selbstwirksamkeit, soziale Normen und Emotionen erhalten dabei jeweils ein eigenes Kapitel. Leitfragen und alltagsnahe Beispiele ermöglichen eine direkte Anwendung im Umweltschutz. Das Handbuch richtet sich damit an alle, die ihre Umweltschutzprojekte und ihre Kommunikation wirksamer gestalten möchten - sei es im pädagogischen Bereich, beim urbanen Gärtnern, im Umweltaktivismus oder bei der Arbeit für Umweltorganisationen

2019 IEEE 35th International Conference on Data Engineering (ICDE) / Effective Filters and Linear Time Verification for Tree Similarity Joins

The tree similarity join computes all similar pairs in a collection of trees. Two trees are similar if their edit distance falls within a user-defined threshold. Previous algorithms, which are based on a filter-verify approach, suffer from the following two issues. First, ineffective filters produce a large number of candidates that must be further verified. Second, the candidates are verified by computing the tree edit distance, which is cubic in the number of tree nodes. Thus, these techniques fail to scale to large tree collections and are infeasible even for small collections when the trees are large. In this paper, we present a scalable solution for the tree similarity join that is based on (1) an effective indexing technique that leverages both the labels and the structure of trees to reduce the number of candidates, (2) an efficient upper bound filter that moves many of the candidates directly to the join result without additional verification, (3) a linear time verification technique for the remaining candidates that avoids the expensive tree edit distance. We are the first to propose an efficient, non-trivial upper bound and linear time verification for the tree edit distance. Unlike previous solutions, our approach scales to collections with millions of trees. We improve the overall join time by up to two orders of magnitude w.r.t. the state of the art.P 29859(VLID)448688

In vitro guidance of retinal ganglion cell axons by RAGS, a 25 kDa tectal protein related to ligands for Eph receptor tyrosine kinases

AbstractThe results of previous in vitro experiments indicate that a glycosylphosphatidylinositol (GPI)-anchored protein may play an important role in the guidance of temporal retinal axons during the formation of the topographically ordered retinotectal projection. We have purified and cloned a GPI-anchored, 25 kDa glycoprotein that is a good candidate for a molecule involved in this process. During the time of innervation by retinal ganglion cells, this protein is gradedly expressed in the posterior part of the developing tectum. In two different in vitro assay systems, the recombinant protein induces growth cone collapse and repulsion of retinal ganglion cell axons. These phenomena are observed for axons of temporal as well as nasal origin, indicating that an additional activity may be necessary to confer the nasotemporal specificity observed in previous assays. We named the protein RAGS (for repulsive axon guidance signal). The sequence of RAGS shows significant homology to recently identified ligands for receptor tyrosine kinases of the Eph subfamily

Shared and distinct functions of RAGS and ELF-1 in guiding retinal axons.

Two ligands for Eph-related receptor tyrosine kinases, RAGS and ELF-1, have been implicated in the control of development of the retinotectal projection. Both molecules are expressed in overlapping gradients in the tectum, the target area of retinal ganglion cell axons. In two in vitro assays ELF-1 is shown to have a repellent axon guidance function for temporal, but apparently not for nasal axons. RAGS on the other hand is repellent for both types of axons, though to different degrees. Thus, RAGS and ELF-1 share some and differ in other properties. The biological activities of these molecules correlate with the strength of interaction with their receptors expressed on RGC axons. The meaning of these findings for guidance of retinal axons in the tectum is discussed