Pre-socratic media theory

Drawing inspiration from Siegfried Zielinski’s ground-breaking study of media archaeology, Deep Time of the Media, this paper explores the potential for pre-Socratic philosophy to provide a model for alternative conceptions of mediation within contemporary media art. It argues that pre-Socratic philosophy develops notions of mediation that extend beyond the contemporary focus on technical media. In their exploration of fundamental dynamic principles within nature and in their sensitivity to the uncertain relation between truth, appearance and finite human understanding, they suggest diverse conceptions of mediation that have continuing critical and creative relevance

Physical therapy in wound care a cost-effectiveness analysis

© 2015 Wolters Kluwer Health, Inc. All rights reserved. Management of chronic wounds remains unsatisfactory in terms of treatment cost and time required for complete wound closure (CWC). This study aimed to calculate the healing rates, estimated cost, and time required for CWC in wounds; compare estimated wound care costs between healing and nonhealing wounds; and compare cost effectiveness between venous leg ulcer (VLU) and non-VLU. This was a retrospective cohort study performed at a physical therapy (PT) wound care clinic. Deidentified patient data in the electronicmedical database from September 10, 2012 to January 23, 2015 were extracted. Among 159 included patients with wounds, 119 (74.84%) patients were healed with CWC. The included patients were treated for 109.70±95.70 days, 29.71±25.66 visits, and at the costs per treatment episode of $1629.65±1378.82 per reimbursement rate and$2711.42±2356.81 per breakeven rate. For patients with CWC (healing group), the treatment duration was 98.01±76.12 days with the time for CWC as 72.45±64.21 days; the cost per treatment episode was $1327.24±1143.53 for reimbursement rate and$2492.58±2106.88 for breakeven cost. For patients with nonhealing wounds, treatment duration was found to be longer with costs significantly higher (

The Deepest Radio Study of the Pulsar Wind Nebula G21.5-0.9: Still No Evidence for the Supernova Shell

We report on sensitive new 1.4-GHz VLA radio observations of the pulsar wind nebula G21.5-0.9, powered by PSR J1833-1034, and its environs. Our observations were targeted at searching for the radio counterpart of the shell-like structure seen surrounding the pulsar wind nebula in X-rays. Some such radio emission might be expected as the ejecta from the <~ 1000 yr old supernova expand and interact with the surrounding medium. We find, however, no radio emission from the shell, and can place a conservative 3-sigma upper limit on its 1-GHz surface brightness of 7 x 10^-22 W/m^2/Hz/sr, comparable to the lowest limits obtained for radio emission from shells around other pulsar-wind nebulae. Our widefield radio image also shows the presence of two extended objects of low-surface brightness. We re-examine previous 327-MHz images, on which both the new objects are visible. We identify the first, G21.64-0.84, as a new shell-type supernova remnant, with a diameter of ~13' and an unusual double-shell structure. The second, G21.45-0.59, ~1' in diameter, is likely an HII region.Comment: 8 Pages, submitted to MNRA

Pulsar Wind Nebulae in EGRET Error Boxes

A remarkable number of pulsar wind nebulae (PWN) are coincident with EGRET gamma-ray sources. X-ray and radio imaging studies of unidentified EGRET sources have resulted in the discovery of at least 6 new pulsar wind nebulae (PWN). Stationary PWN (SPWN) appear to be associated with steady EGRET sources with hard spectra, typical for gamma-ray pulsars. Their toroidal morphologies can help determine the geometry of the pulsar which is useful for constraining models of pulsed gamma-ray emission. Rapidly moving PWN (RPWN) with more cometary morphologies seem to be associated with variable EGRET sources in regions where the ambient medium is dense compared to what is typical for the ISM.Comment: 8 pages, 5 figures, to appear in the proceedings of "The Multiwavelength Approach to Unidentified Sources", ed. G. Romero & K.S. Chen