The Relative Occupational Success of Blacks and Whites

macroeconomics, occupational success

Serotonin, Motivation, and Playfulness in the Juvenile Rat

The effects of the selective 5HT1A agonist 8-OH-DPAT were assessed on the play behavior of juvenile rats. When both rats of the test pair were comparably motivated to play, the only significant effect of 8-OH-DPAT was for play to be reduced at higher doses. When there was a baseline asymmetry in playful solicitation due to a differential motivation to play and only one rat of the pair was treated, low doses of 8-OH-DPAT resulted in a collapse of asymmetry in playful solicitations. It did not matter whether the rat that was treated initially accounted for more nape contacts or fewer nape contacts, the net effect of 8-OH-DPAT in this model was for low doses of 8-OH-DPAT to decrease a pre-established asymmetry in play solicitation. It is concluded that selective stimulation of 5HT1A receptors changes the dynamic of a playful interaction between two participants that are differentially motivated to play. These results are discussed within a broader framework of serotonergic involvement in mammalian playfulness

Camera Calibration from Dynamic Silhouettes Using Motion Barcodes

Computing the epipolar geometry between cameras with very different viewpoints is often problematic as matching points are hard to find. In these cases, it has been proposed to use information from dynamic objects in the scene for suggesting point and line correspondences. We propose a speed up of about two orders of magnitude, as well as an increase in robustness and accuracy, to methods computing epipolar geometry from dynamic silhouettes. This improvement is based on a new temporal signature: motion barcode for lines. Motion barcode is a binary temporal sequence for lines, indicating for each frame the existence of at least one foreground pixel on that line. The motion barcodes of two corresponding epipolar lines are very similar, so the search for corresponding epipolar lines can be limited only to lines having similar barcodes. The use of motion barcodes leads to increased speed, accuracy, and robustness in computing the epipolar geometry.Comment: Update metadat

Wahrnehmung als Kategorie der Literatur- und Kulturwissenschaft

In ihrer einführenden Studie versucht Ingrid Kasten (durch die Vorstellung neuerer methodologischer und literaturtheoretischer Konzepte), den Begriff der Wahrnehmung als epistemische Kategorie der Literaturwissenschaft weiter zu fundieren indem sie Anknüpfungsmöglichkeiten in anderen, benachbarten Forschungsgebieten sucht (u.a. in der Sprechakttheorie, in der philosophischen Phänomenologie und im Forschungs-paradigma ‚Theatralität’ / ‚Szenographie’); Kasten betrachtet die Kategorie der Wahrnehmung als eine „kulturtheoretisch argumentierende Literaturwissenschaft“

Künstler: Namen – Daten - Normen

Der Artikel schildert kurz die Geschichte und Erscheinungsweise des Allgemeinen Künstlerlexikons (AKL), beschreibt sein auf HIDA/MIDAS basierendes Datenbanksystem, die Namensansetzung der verzeichneten Künstler und die Datenstruktur der Künstlereinträge