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11.
The United States of America would seem to be an excellent location for using pollen data in forensic applications. The vegetation within the region is highly diverse ranging from areas of Arctic tundra to some of the most inhospitable deserts anywhere in the Western Hemisphere. The highly varied ecology, great plant diversity, thousands of vegetational microhabitats, and extensive published pollen records for the region provide an ideal setting for these types of analyses. This diversity, often characterized in most locations by unique combinations of pollen types, makes the use of forensic pollen a reliable technique that can often be used to associate individuals with a unique crime scene or geographical region. Nevertheless, forensic pollen studies in the United States of America are currently one of the most highly under utilized techniques available to assist in solving criminal and civil cases. During the past century there has been a very limited attempt to use pollen evidence in either criminal or civil cases, for a variety of reasons, including a lack of available information about the technique, a very limited number of specialists trained to do forensic pollen work, and an almost total absence of academic centers able to train needed specialists or forensic facilities able, or willing, to fund research in this area. Hopefully, this paucity of use will change if certain steps are taken to encourage the routine collection and use of pollen evidence in both criminal and civil cases.  相似文献   
12.
This article shows that highly correlated measures can producedifferent results. We identify a democratization model fromthe literature and test it in more than 120 countries from 1951to 1992. Then, we check whether the results are robust regardingmeasures of democracy, time periods, and levels of development.The findings show that measures do matter: Whereas some of thefindings are robust, most of them are not. This explains, inpart, why the debates on democracy have continued rather thanbeen resolved. More important, it underscores the need for morecareful use of measures and further testing to increase confidencein the findings. Scholars in comparative politics are drawnincreasingly to large-N statistical analyses, often using datasets collected by others. As in any field, we show how theymust be careful in choosing the most appropriate measures fortheir studies, without assuming that any correlated measurewill do.  相似文献   
13.
This study examines type-specific and cumulative experiences of violence among a vulnerable population of youth. Sixty high-risk, shelter-dwelling, urban youth were interviewed regarding their history of childhood maltreatment, exposure to community violence (ECV), and experience with intimate partner violence (IPV). Results show a high prevalence and high degree of overlap among multiple types of violence exposure. Childhood physical, sexual (CSA), and emotional (CEA) abuse were interrelated and were associated with ECV. Cumulative experiences of childhood abuse (CCA) had a graded association with IPV victimization. In multivariate analyses, CCA and ECV were independently associated with IPV victimization. Gender moderated the effect of one association: CEA raised the risk of IPV victimization for girls but not for boys. Only CSA predicted IPV perpetration. Findings suggest that cumulative exposures to violence create cumulative risk for experiencing more violence. Shelter-dwelling, urban youth may be particularly vulnerable to this additive effect.  相似文献   
14.
Research programs, like other government programs, are now being requested to demonstrate relevance and value added to national social and economic needs. Complexity, unpredictability and other factors make it difficult to define specific performance measures for R&D programs. This paper describes the performance measurement efforts of one technology development program within the U.S. Department of Energy and proposes a strategy for applying this balanced scorecard approach to a fundamental research organization. Simple logical models of the inputs, activities, outcomes and long term results of R&D programs are proposed. A critical few measures of performance that answer questions from multiple audiences are then chosen across this performance spectrum. This paper describes work performed by Sandia National Laboratories Energy Policy and Planning Department, Albuquerque, New Mexico 87185, with the support of the U.S. Department of Energy under contract DE-AC0494AL85000. The continued support and enthusiams of Darrell Beschen in the DOE Office of Energy Efficiency and Renewable Energy and Iran Thomas in DOE Office of Energy Research, Basic Energy Sciences, is appreciated. The authors also acknowledge the contributions of John Reed and the training in the logic chart and performance spectrum provided by Ron Corbeil and Steve Montague. The opinions expressed are those of the authors and do not represent the opinions of the U.S. Department of Energy.  相似文献   
15.
This paper focuses on potential hazards and risks to forensic anthropologists while working in the field and laboratory in North America. Much has changed since Galloway and Snodgrass published their seminal article addressing these issues. The increased number of forensic practitioners combined with new information about potential hazards calls for an updated review of these pathogens and chemicals. Discussion of pathogen hazards (Brucella, Borrelia burgdorferi, Yersinia pestis, Clostridium tetani and West Nile virus) includes important history, exposure routes, environmental survivability, early symptoms, treatments with corresponding morbidity and mortality rates, and decontamination measures. Additionally, data pertaining to the use of formaldehyde in the laboratory environment have resulted in updated safety regulations, and these are highlighted. These data should inform field and laboratory protocols. The hazards of working directly with human remains are discussed in a companion article, “An Update on the Hazards and Risks of Forensic Anthropology, Part I: Human Remains.”  相似文献   
16.
Advances in information technologies over the last two decades have offered the promise of revolutionizing workplaces and other settings by expanding the capabilities of individuals working in various professions. Enabled by high-speed computing systems and marked by an intensification of command and control properties, new technologies have expanded, and in some cases intentionally surpassed, the scope of the senses. Technologies such as drones, surveillance cameras, and airport and border security systems promise the seemingly infinite catchment and infinitesimal account of human actions, while computer processing software provides real-time data on large-scale transactional processes occurring in monetary systems and security markets. Charting, tracking, and mapping functions open up new vistas for quantifying social behaviors and detecting misbehaviors, creating new frontiers for criminal justice, the military, and economic activity. The papers in this special issue reveal the processes guiding the rapid transformation and flexible adaptation of institutional structures, economic and financial systems, and threat surveillance and military/police mobilization in the near future.  相似文献   
17.
This paper examines the trend in absentee voting over the last 30 years in California. With the liberalization of absentee voting laws and practices, an increase in the numbers of absentee voters quickly followed. Absentee voters have already demonstrated their ability to influence the outcomes of local elections. An open question is what will become of absentee voters in the future. If they are the model for voting at home, and if technological advances allow such, then the behavior of current absentee voters may be indicative of the future electorate. The increasing trend of voters opting for absentee ballots is analyzed by using GLS on a random-effects time-series cross-section model with county-level data. The focus is on identifying structural factors such as changing voter demographics that have influenced the decision of voters to cast absentee ballots. Thirty-three recent statewide elections in California are the basis for this analysis, covering the statewide primary and general elections from November 1962 through November 1994. We find that the impact of demographics and time trends on absentee voting differ between general and primary elections. In addition, we find that a 1977 liberalization law in California had the effect of accelerating the usage of the absentee format. Finally, we conclude that absentee and precinct voting are substitutes in general elections but complements in primary elections.  相似文献   
18.
Improving locational outcomes emerged as a major policy hope for the nation's largest low-income housing program over the past two decades, but a host of supply and demand-side barriers confront rental voucher users, leading to heated debate over the importance of choice versus constraint. In this context, we examine the Moving to Opportunity experiment's first decade, using a mixed-method approach.

MTO families faced major barriers in tightening markets, yet diverse housing trajectories emerged, reflecting variation in: (a) willingness to trade location – in particular, safety and avoidance of “ghetto” behavior – to get larger, better housing units after initial relocation; (b) the distribution of neighborhood types in different metro areas; and (c) circumstances that produced many involuntary moves. Access to social networks or services “left behind” in poorer neighborhoods seldom drove moving decisions. Numerous moves were brokered by rental agents who provided shortcuts to willing landlords but thereby steered participants to particular neighborhoods.  相似文献   
19.
Colombia's chronic war is one of the world's worst humanitarian crises. Amid armed actors, pervasive violence, and increasing militarisation, many citizens experience hostility from all sides. This violence continues the historical marginalisation of Afro-descendant, indigenous, and campesino communities and is intensified by the ‘global war on terror’. Some ‘peace communities’ are rejecting violence and seeking ways to survive within war—becoming protagonists in their own protection. This is risky: it draws accusations, threats, and attacks by all armed actors, including the state. Over time, the lack of sustainable livelihoods, weak internal cohesion, and antagonistic external dynamics test the determination of such communities. This article examines four peace communities and explores factors that generate and sustain grassroots protagonism. It ends by suggesting ways in which development organisations can enhance community-level protection and reinforce local peace processes, in order to contribute to broader peace building.  相似文献   
20.
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