Near-infrared sensitivity enhancement of photorefractive polymer composites by pre-illumination

Among the various applications for reversible holographic storage media, a particularly interesting one is time-gated holographic imaging (TGHI). This technique could provide a noninvasive medical diagnosis tool, related to optical coherence tomography. In this technique, biological samples are illuminated within their transparency windowwith near-infrared light, and information about subsurface features is obtained by a detection method that distinguishes between reflected photons originating from a certain depth and those scattered from various depths. Such an application requires reversible holographic storage media with very high sensitivity in the near-infrared. Photorefractive materials, in particular certain amorphous organic systems, are in principle promising candidate media, but their sensitivity has so far been too low, mainly owing to their long response times in the near-infrared. Here we introduce an organic photorefractive material—a composite based on the poly(arylene vinylene) copolymer TPD-PPV—that exhibits favourable near-infrared characteristics. We show that pre-illumination of this material at a shorter wavelength before holographic recording improves the response time by a factor of 40. This process was found to be reversible. We demonstrate multiple holographic recording with this technique at video rate under practical conditions

Smoke and Mirrors: U.K. Newspaper Representations of Intimate Partner Domestic Violence

This is a pre-copyedited, author-produced pdf of an article accepted for publication in Violence Against Women following peer review. The final, definitive version of this paper has been published in Violence Against Women, Vol 23 (1): 114-139, first published April 2016 by SAGE Publishing, and is available on line at doi: 10.1177/1077801216634468. All rights reserved.News media are in a position to project certain perspectives on domestic violence while marginalizing others, which has implications for public understanding and policy development. This study applies discourse analysis to articles on domestic violence in two U.K. national daily newspapers published in 2001-2002 and 2011-2012 to evaluate evidence of change over a 10-year time span. The research examines how discourses of domestic violence are constructed through newspaper representations of victims, predominantly women, and perpetrators, predominantly men. Although one of the newspapers adopts a respectful position toward women, the textual and visual techniques adopted by the other reveal a tendency for blaming the victim and sexualizing violence related to perceptions of “deserving” or “undeserving” women victims.Peer reviewe