Towards a Practice of Palimpsestic Listening

This article invites reflection on the ambiguity of sonic temporalities as the lines between physicality and immediacy become increasingly blurred. Through the notion that digital technologies are haunted by analogic process, I foreground the concept of Palimpsestic Listening to explore the musical qualities and critical resonances of sonic acts and objects in hybrid physical/digital systems that evoke layered temporalities that are ‘historically distinct nonetheless linked’. I also seek to illustrate the significance of engaging practically with this concept by discussing the methods behind my composition D/ta Ro} – A Dialectical Trash Heap, a sound installation that interrogates the relationship between sonic materiality and digital audio processing and how acts of erasure and time-stretching might influence the layering of disparate sound materials.

One Game Problem for Oscillatory Systems

The paper concerns the linear differential game of approaching a cylindrical terminal set. We study the case when classic Pontryagin’s condition does not hold. Instead, the modified considerably weaker condition, dealing with the function of time stretching, is used. The latter allows expanding the range of problems susceptible to analytical solution by the way of passing to the game with delayed information. Investigation is carried out in the frames of Pontryagin’s First Direct method that provides hitting the terminal set by a trajectory of the conflict-controlled process at finite instant of time. In so doing, the pursuer’s control, realizing the game goal, is constructed on the basis of the Filippov-Castaing theorem on measurable choice. The outlined scheme is applied to solving the problem of pursuit for two different second-order systems, describing damped oscillations. For this game, we constructed the function of time stretching and deduced conditions on the game parameters, ensuring termination of the game at a finite instant of time, starting from arbitrary initial states and under all admissible controls of the evader. Keywords: differential game, time-variable information delay, Pontryagin’s condition, Aumann’s integral, principle of time stretching, Minkowski’ difference, damped oscillations.

Inkjet Printing of PEDOT:PSS Based Conductive Patterns for 3D Forming Applications

This paper presents the formulation, inkjet printing, and vacuum forming of a conductive and stretchable polymer, poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), ink on a stretchable and transparent thermoplastic polyurethane (TPU) substrate. The formulation of the conductive and stretchable ink is achieved by combining PEDOT:PSS with additional solvents, to achieve the right inkjet properties for drop-on-demand (DoD) inkjet printing. A conductive pattern can be printed from the 21 µm orifice on a flexible and stretchable TPU substrate, with a linewidth down to 44 µm. The properties of the printed pattern, in terms of sheet resistance, morphology, transparency, impact of weather conditions, and stretching are investigated and show sheet resistances up to 45 Ohm/sq and transparencies as high as 95%, which is comparable to indium tin oxide (ITO). Moreover, in contrast to ITO, one-time stretching up to 40% can be achieved, increasing the sheet resistance up to 214 Ohm/sq only, showing the great potential of this ink for one-time stretching. Finally, as a proof of this one-time stretching, the printed samples are vacuum formed around a 3D object, still showing sufficient conductivity to be applied as a capacitive touch sensor.

Introduction

The present collection of essays is the second English volume devoted to the philosophy of F.W.J. Schelling (1775–1854).1 Such a volume is timely, yet overdue. After longstanding neglect, earnest Anglophone interest in German idealism—the philosophical movement with which Schelling is most associated—began toward the end of the twentieth century, opening scholars to the continuing relevance of the problems tackled and solutions offered during the time stretching ‘von Kant bis Hegel’. Misreadings resulting from overuse of this refrain—neglecting positions and challenges that enable Hegel’s attempt to surpass Kant, misconstruing Hegel as the culmination of German idealism—have been slowly corrected through increased attention to other figures from this period, including Fichte, Goethe, Herder, Jacobi, Maimon, Reinhold, and, gradually, Schelling....