The Recreation of Wound Patterns Using Various Tissue Simulants for Crime Scene Reconstruction

Within the field of forensic science, there are limited reliable methods for the simulation of pattern injuries on human skin and tissue that may aid in aspects of crime scene reconstruction. The tissue simulant must be of sufficient integrity for recording blunt force trauma and bite mark impressions, electrocution, cutting, and gunshot wound related injuries for the purpose of re-enactment, court exhibition, and distance determination. For wound reenactments (such as blunt force trauma, bite mark impressions and electrocution), dead skin and tissue from human cadavers do not show wounding patterns that would occur on live tissue. This study examines different tissue simulants for the recreation of wound patterns without the use of live animals. For each wound reenactment, tissue simulants (such as ballistic soap, ordnance gelatin and “ballistic dummies”) were penetrated and wound patterns were formed and were analyzed in detail. Penetration depth, as well as the path shape, were analyzed for both stabbings and gunshot wounds. For the electrocution wound pattern, a Taser was tested on ballistic soap. Photography was used to document findings with the various tissue simulants. In this research, comparison and stereo microscopes were also used to observe the different wound patterns in detail and compare the weapon used to the wound it formed. The wound patterns were also compared with patterns observed during other injury simulations, found in the literature on human remains to determine which simulant was the most ideal for recreating several types of wound patterns. This is a means by which the events of a crime can be visualized and validated and then be brought before a jury to help understand how a pattern injury occurred. This research provides insight to the area that is relatively unexplored in crime scene reconstruction by helping to identify the type of injury and weapon, based on the appearance of wounds

REDO RSVP: Efficient Signalling for Multimedia in the Internet

Alarming reports of performance and scalability problems associated with per-flow reservations, have led many to lose belief in RSVP and the Integrated Services Architecture that relies on it. Because we are convinced of the need for some form of resource reservation, to support multimedia communications in the Internet, we have set about trying to improve RSVP. By careful study of the protocol, we have identified areas for improvement, and propose REDO RSVP, a reduced overhead version that includes a fast establishment mechanism (FEM). In this paper we describe the rationale for REDO RSVP and present a detailed analysis of its features and operations. We also analyse REDO RSVP by means of simulations, and show that it offers improvements to the performance of RSVP

Mediated culture / mediated education

It took tens of thousands of years for writing to emerge after humans spoke their first words. It took thousands more before the printing press and a few hundred again before the telegraph. Today a new medium of communication emerges every time somebody creates a new web application. A Flickr here, a Twitter there, and a new way of relating to others emerges. New types of conversation, argumentation, and collaboration are realized. Using examples from anthropological fieldwork in Papua New Guinea, YouTube, classrooms, and "the future," this presentation will demonstrate the profound yet often unnoticed ways in which media "mediate" our conversations, classrooms, and institutions. We will then apply these insights to an exploration of the implications for how we may need to rethink how we teach, what we teach, and who we think we are teaching

Owning What You Know

What role does higher education play in creating an informed and critical electorate? Linfield Magazine explores that question with members of the mass communication and political science faculty