36 research outputs found
The Socialities of Things
No full textThis is an essay included in the publication accompanying the project Dinge und Dialoge (Things and Dialogues), an artistic and a philosophical venture taking the form of two interrelated but differently materialized gatherings of artworks by Daniel Heinrich, Kathi Hofer, Barbara Kapusta, Ulrike Köppinger, Katrin Mayer, Ulrike Müller, Rocco Pagel and Jenni Tischer. One of them is the publication to which this is a contribution, and the other was an exhibition held during the winter months of 2015-16 at Scriptings, the Berlin-based showroom and publishing house set up by Achim Lengerer. The essay considers three models for thinking the exhibition's 'Things and Dialogues' relationship non-dualistically: 'Model One: Structures of Intercorporeality and Intentionality' (drawing on Merleau-Pontean phenomenology and referencing the work of Kaja Silverman on 'the language of things'); 'Model Two: Hilary Lawson’s Openness and Closure' (drawing on Lawson's 2001 book Closure: A Story of Everything); 'Model Three: “Sacred Conversations”' (drawing on insights from the early Renaissance painterly tradition of the sacra conversazioni - an issue I discuss at length in the 4th chapter of my 2014 book Showing Off! A Philosophy of Image)
Theoretical frameworks for the learning of geometrical reasoning
No full textWith the growth in interest in geometrical ideas it is important to be clear about the nature of geometrical reasoning and how it develops. This paper provides an overview of three theoretical frameworks for the learning of geometrical reasoning: the van Hiele model of thinking in geometry, Fischbein’s theory of figural concepts, and Duval’s cognitive model of geometrical reasoning. Each of these frameworks provides theoretical resources to support research into the development of geometrical reasoning in students and related aspects of visualisation and construction. This overview concludes that much research about the deep process of the development and the learning of visualisation and reasoning is still needed
ANOMALOUS POPULATION DISTRIBUTION IN THE STATE OF MOLECULAR HYDROGEN
No full text1 H. Tischer and A. V. Phelps, Chem. Phys. Lett. 117, 550 (1985)Author Institution: Department of Physics and Astronomy, State University of New York at Buffalo; Department of Physics and Engineering, Hampton UniversityWe have observed about 700 lines of the absorption spectrum of molecular hydrogen arising from transitions between the state and the complex using the technique of dye laser intracavity absorption. Because of the nature of the energy levels one component of the doublet of each rotational level of the 2c state predissociates with a lifetime of the order of sec, while the non-predissociative component has a lifetime of about sec, for radiative decay. This would suggest that the density of molecules in the predissociative states should be at least a factor of smaller than that of the non-predissciative state. Our data shows that in an rf produced hydrogen plasma the intensities of the two kinds of transitions are comparable. The linearity of our ICA system has been demonstrated by measuring the quenching rate of the state by Ne, and obtaining the same result given by Tischer and Phelps1. Our data suggests that there is a mechanism operating in the plasma which preferentially populates the predissociative states, and some suggestions as to its nature will be presented
