Forms and Rotational States of the Nuclei of Ecliptic Comets

In this thesis I present measurements of the physical properties of the nuclei of Jupiter Family comets (JFCs), based on time-series observations. From the time-series photometry rotation rates and elongations were measured, and from these constraints were placed on the bulk density and porosity of nuclei. Multi-filter imaging was performed to enable measurement of their surface colours. In addition, a large amount of `snap-shot' imaging was performed during the observing runs, and taken with the time-series data is used to measure nuclei sizes. These results are compared with other data from the literature to study the general properties of JFC nuclei. (Abridged)Comment: Ph.D thesis, Queen's University Belfast, Sept 2006. Full text at http://homepage.mac.com/colinsnodgrass/FileSharing2.htm

The nucleus of 103P/Hartley 2, target of the EPOXI mission

103P/Hartley 2 was selected as the target comet for the Deep Impact extended mission, EPOXI, in October 2007. There have been no direct optical observations of the nucleus of this comet, as it has always been highly active when previously observed. We aimed to recover the comet near to aphelion, to a) confirm that it had not broken up and was in the predicted position, b) to provide astrometry and brightness information for mission planning, and c) to continue the characterisation of the nucleus. We observed the comet at heliocentric distances between 5.7 and 5.5 AU, using FORS2 at the VLT, at 4 epochs between May and July 2008. We performed VRI photometry on deep stacked images to look for activity and measure the absolute magnitude and therefore estimate the size of the nucleus. We recovered the comet near the expected position, with a magnitude of m_R = 23.74 \pm 0.06 at the first epoch. The comet had no visible coma, although comparison of the profile with a stellar one showed that there was faint activity, or possibly a contribution to the flux from the dust trail from previous activity. This activity appears to fade at further epochs, implying that this is a continuation of activity past aphelion from the previous apparition rather than an early start to activity before the next perihelion. Our data imply a nucleus radius of \le 1 km for an assumed 4% albedo; we estimate a ~6% albedo. We measure a colour of (V-R) = 0. 26 \pm 0.09.Comment: 5 pages, 4 figures, accepted for publication in A&

Sexual Assault Case Processing: A Descriptive Model of Attrition and Decision Making

The outcomes of sexual assaults involving one suspect and one victim reported to the Anchorage Police Department (APD) in 2000 to 2003 were examined. Overall, 1,235 sexual assaults were reported to APD during this period, of which 1,074 involved one suspect and one victim. Data were collected on 1,052 of these cases to learn how the Alaska Department of Law disposed of these cases. Of the 1,052 cases examined, 188 (17.9%) were referred to the Department of Law, 127 were accepted for prosecution, and 111 resulted in a conviction. Clearly, the point of greatest attrition is from report to referral, with 85.2 percent of reported sexual assaults not being referred for prosecution. However, most offenders whose cases reach prosecutors are held accountable in some degree through the imposition of criminal sanctions.National Institute of Justice, Office of Justice Programs, United States Department of Justice. Grant No. 2004-WB-GX-0003.Acknowledgements / Executive Summary / Statement of Research / Data Collection / Overview of Case Progression / Results / Conclusions and Discussion / Appendice

Sexual Assault Study: Differences by Victim's Alcohol Use

Poster originally presented to the Anchorage Police Department and the 2004 Alaska Summit on Violence Against Women.This issue of Anchorage Community Indicators Series 2, "Sexual Assault Study," describes the spatial patterning and geographical concentration of 282 sexual assaults reported to the Anchorage Police Department in 2001 by victim's alcohol use.This research was supported by Grant No. 2000-RH-CX-K039 awarded by the Bureau of Justice Statistics and by a UAA Faculty Development Grant to the second author.Data Sexual assault densities by victim's alcohol use (maps) / Alcohol use (by suspect) / Victim injuries / Age (of victim; of suspect) / Race (of victim; of suspect) / Location (pick-up location; assault location) / Time to report / Relationshi

Sexual Assault Case Processing: A Descriptive Model of Attrition and Decision Making

Originally published in the Alaska Justice Forum 23(1): 1, 4-8 (Spring 2006).This study examined the outcomes of sexual assault cases reported to the Anchorage Police Department between January 2000 and December 2003. The data include 1,052 cases involving one suspect and one victim (85% of all reported sexual assaults). Cases and charges were tracked through the Alaska Department of Law to determine what was referred, accepted, and convicted. * Overall, 18% of cases were referred for prosecution. The most common referred charge was a sexual assault in the first degree. Seventy-nine percent of referred charges were sexual assault charges. * Overall, 12% of cases were accepted for prosecution. The greatest point of attrition was from report to referral. Once referred, 68% of cases were accepted for prosecution. Sixty-eight percent of charges were accepted by the Department of Law as referred. The most common reasons for not accepting a charge as referred were evidentiary reasons. The most common accepted charge was also a sexual assault in the first degree. Seventy-five percent of accepted charges were sexual assault charges. * Overall, 11% of cases resulted in a conviction. Once accepted, 87% of cases resulted in a conviction. Although convictions were common in accepted cases, accepted charges were often dismissed. While 87% of accepted cases resulted in a conviction, 59% of accepted charges were dismissed. Ninety percent of guilty findings were a result of plea bargaining. With plea bargaining, some charges were dismissed but a conviction was still secured. Fifty-six percent of convicted charges were sexual assault charges. The most common convicted charge was for assault, followed by sexual assault in the second degree

Quantitative Analysis of Disparities in Juvenile Delinquency Referrals to the Fairbanks North Star Borough, FY2005-06

Minority youths in the Fairbanks North Star Borough are referred to the Alaska Division of Juvenile Justice (DJJ) for delinquent behavior at rates much higher than white youths.This report describes disproportionate minority contact with the Alaska juvenile justice system for youths referred to the Fairbanks office of the Division of Juvenile Justice during fiscal years 2005 and 2006 (July 1, 2004, to June 30, 2006). Possible sources of disproportionate minority contact are subsequently narrowed by examining the impact of race and ethnicity, gender, type of referral, and geography. By developing a detailed understanding of the scope of disproportionate minority contact, we become much better prepared to identify its causes and to develop evidence-based solutions.Alaska Division of Juvenile Justice. National Institute of Justice. Grant No. 2005-IJ-CX-0013. Office of Juvenile Justice and Delinquency Prevention. Grant No. 2001-JF-FX-0005.Index of Tables and Figures / Acknowledgements / Executive Summary / Quantitative Analysis of Disparities in Referrals / Sample and Data / Analysis / Results / Summary and Conclusions / Appendix A - Technical Notes on Relative Rate Indices / Appendix B - Technical Notes on Fisher's Exact Test / Appendix C - Technical Notes on Relative EB Rate Indices / Appendix D - Map

Cattle develop neutralizing antibodies to rotavirus serotypes which could not be isolated from faeces of symptomatic calves

Neutralizing antibodies against 10 serotypes of rotavirus were measured in sera from different age groups of German cattle. Only five of 143 sera did not neutralize heterologous serotypes. Sera from 64 of 76 calves younger than 1 year neutralized bovine rotavirus NCDV (serotype 6). From these calves, sera 54, 26, 51, 24, 12, 10 and 37, in neutralized addition, the heterologous serotypes 1, 2, 3, 4, 5, 7 and 9, respectively. Thirty-eight of 46 rotavirus isolates from Bavarian calves with diarrhoea were serotyped by neutralization: 22, 2 and 14 isolates were typed as serotype 6, serotype 10 (B223) and a newly defined subtype of serotype 10 (V1005), respectively. All serotype 6 isolates and none of the serotype 10 or V1005-like viruses tested hybridized to a NCDV-specific cDNA probe. Eight isolates gave equivocal results by neutralization. We failed however to identify serotype 1, 2, 3, 4 or 8 bovine rotavirus isolates by neutralization with hyperimmune sera and dot blot hybridization with serotype-specific cDNA probes. Thus cross-reacting antibodies in cattle might not represent an anamnestic response, but the recognition of a cross-reacting neutralization epitope shared by many rotavirus serotype