A field study of the accuracy and reliability of a biometric iris recognition system

PurposeThe iris of the eye appears to satisfy the criteria for a good anatomical characteristic for use in a biometric system. The purpose of this study was to evaluate a biometric iris recognition system: Mobile-Eyes?.MethodsThe enrollment, verification, and identification applications were evaluated in a field study for accuracy and reliability using both irises of 277 subjects. Independent variables included a wide range of subject demographics, ambient light, and ambient temperature. A sub-set of 35 subjects had alcohol-induced nystagmus. There were 2710 identification and verification attempts, which resulted in 1,501,340 and 5540 iris comparisons respectively.ResultsIn this study, the system successfully enrolled all subjects on the first attempt. All 277 subjects were successfully verified and identified on the first day of enrollment. None of the current or prior eye conditions prevented enrollment, verification, or identification. All 35 subjects with alcohol-induced nystagmus were successfully verified and identified. There were no false verifications or false identifications. Two conditions were identified that potentially could circumvent the use of iris recognitions systems in general.ConclusionsThe Mobile-Eyes? iris recognition system exhibited accurate and reliable enrollment, verification, and identification applications in this study. It may have special applications in subjects with nystagmus.     

Trends in City Conditions During the 1970s: A Survey of Demographic and Socioeconomic Changes

Changes in the demographic and socioeconomic conditions of 627cities between 1970 and 1980 are examined using simple comparisonof means and correlational analytic techniques. Cities are groupedaccording to their type (Central city; suburb), regional location,and rate of population growth (decline). Major changes occurredin employment patterns, income levels, economic bases, racialcomposition, and social pathologies (crime rates)—allmeasures of urban stress. These conditions tended to clusterin certain types of cities: large, declining central citiesof the Northeast and Midwest. But population decline and regionallocation were not found to be independent determinants of urbandistress. National and regional economic trends, especiallychanges in the vitality of the metropolitan area in which acity is located. were the primary determinants.     

美国应对环境犯罪的行政范式与刑事对策

近几十年很多国家在立法上均强化对生态环境的保护。在美国，实施环境犯罪的公司受到刑事侦查者最密切的注意；在环境犯罪研究领域，个案研究成为基本内容，理性选择理论则成为最重要的理论假设。     

Whose business is your pancreas? Potential privacy problems in New York City's mandatory diabetes registry

This article examines a recent New York City health regulation that mandates the compilation and storage of individual medical data from nearly all diabetics in a centralized registry. The authors distinguish this novel registry from prior health registries and scrutinize its potential to compromise individual privacy. In order to address privacy and other concerns, the authors offer suggestions for changes to the current statutory framework of the registry that will also be useful when considering the creation of similar public health registries in other cities.     

Forensic Analysis of Explosives Using Isotope Ratio Mass Spectrometry (IRMS)—Part 2: Forensic Inter-Laboratory Trial: Bulk Carbon and Nitrogen Stable Isotopes in a Range of Chemical Compounds (Australia and New Zealand)

Abstract:  Comparability of data over time and between laboratories is a key issue for consideration in the development of global databases, and more broadly for quality assurance in general. One mechanism that can be utilized for evaluating traceability is an inter-laboratory trial. This paper addresses an inter-laboratory trial conducted across a number of Australian and New Zealand isotope ratio mass spectrometry (IRMS) laboratories. The main objective of this trial was to determine whether IRMS laboratories in these countries would record comparable values for the distributed samples. Four carbon containing and four nitrogen containing compounds were distributed to seven laboratories in Australia and one in New Zealand. The laboratories were requested to analyze the samples using their standard procedures. The data from each laboratory was evaluated collectively using International Standard ISO 13528 ( Statistical methods for use in proficiency testing by inter-laboratory comparisons ). "Warning signals" were raised against one participant in this trial. "Action signals" requiring corrective action were raised against four participants. These participants reviewed the data and possible sources for the discrepancies. This inter-laboratory trial was successful in providing an initial snapshot of the potential for traceability between the participating laboratories. The statistical methods described in this article could be used as a model for others needing to evaluate stable isotope results derived from multiple laboratories, e.g., inter-laboratory trials/proficiency testing. Ongoing trials will be conducted to improve traceability across the Australian and New Zealand IRMS community.     

Victim Cooperation in Intimate Partner Sexual Assault Cases: A Mixed Methods Examination

Extant research overwhelmingly indicates that victim cooperation influences case outcomes in both sexual assault and intimate partner violence cases. However, no studies have examined cooperation decisions in intimate partner sexual assault (IPSA) cases. This study uses data on sexual assaults reported to Los Angeles law enforcement in 2008 to address this issue. Because the contextual factors associated with sexual assault can vary dramatically depending on the suspect-victim relationship, this study estimates a model of victim cooperation that includes factors unique to IPSA. Additionally, the current research discusses how police practices and perceptions likely interact with victim characteristics to affect victim cooperation decisions. Quantitative findings are supplemented with a qualitative analysis of the reasons victims reported for declining to cooperate.