Shotcup petal abrasions in close range .410-caliber shotgun injuries

Shotcup petal abrasions centered around a shotgun wound of entrance are generally thought to occur at a range of 30 to 90 cm. A suicidal .410-caliber shotgun injury of the right eye is described in which typical petal abrasions were noted around the entrance wound. However, significant soot deposition around the wound suggested that the range of fire was less than 30 cm and perhaps closer to 15 cm. Test-firing of the weapon and ammunition used by the decedent showed some spread of the shotcup petals at a range of 7.5 cm, progressing to maximum spread at 30 to 52.5 cm. Further testing with other .410 ammunition, containing shotcups, confirmed the spread of shotcup petals at ranges less than 30 cm, irrespective of manufacturer, shotshell length, and birdshot size. When a variety of shotguns were tested, it was found that one weapon with a very short barrel and cylinder bore did not exhibit petal spread until a range of 30 cm was reached. The remaining shotguns, with longer barrels and full choke, all demonstrated definite petal spread at a range of 12.5 cm. The long, narrow configuration of .410 shotcup petals may explain their early spread and the production of petal abrasions at ranges of less than 30 cm.     

Disaster planning for air crashes. A retrospective analysis of Delta Airlines flight 191

The effectiveness of previously untested disaster plans was demonstrated during the aftermath of the crash of Delta Airlines Flight 191 at D/FW International Airport on Friday, August 2, 1985. These plans, in effect for years and subjected to periodic review, were as yet untried before this first disaster at D/FW International since its opening. This paper outlines the disaster plans, the actual problems encountered, the logistics of a disaster of this kind, and insights gained from the experience.     

Do Perceptions of Ballot Secrecy Influence Turnout? Results from a Field Experiment

Although the secret ballot has been secured as a legal matter in the United States, formal secrecy protections are not equivalent to convincing citizens that they may vote privately and without fear of reprisal. We present survey evidence that those who have not previously voted are particularly likely to voice doubts about the secrecy of the voting process. We then report results from a field experiment where we mailed information about protections of ballot secrecy to registered voters prior to the 2010 general election. Consistent with our survey data, we find that these letters increased turnout for registered citizens without records of previous turnout, but they did not appear to influence the behavior of citizens who had previously voted. The increase in turnout of more than three percentage points (20%) for those without previous records of voting is notably larger than the effect of a standard get‐out‐the‐vote mailing for this group. Overall, these results suggest that although the secret ballot is a long‐standing institution in the United States, beliefs about this institution may not match the legal reality.     

Big Five Personality Traits and Responses to Persuasive Appeals: Results from Voter Turnout Experiments

We examine whether Big Five personality traits are associated with heterogeneous responses to commonly used Get-Out-The-Vote (GOTV) appeals in both a survey and a field experiment. The results suggest that Big Five personality traits affect how people respond to the costs and benefits of voting highlighted in GOTV appeals. Our evidence also suggests that one trait—Openness—is associated with broad persuasibility, while others shape responses to particular types of messages. In some cases the conditioning effects of Big Five traits are substantial. For example, in the one-voter households (HHs) included in our field experiment, we find that a mailer that raised the specter of social sanctions increased the likelihood of voting by a statistically greater amount among those scoring high on Openness. The findings constitute an important step forward in understanding how core personality traits shape responses to various aspects of the act of voting.