Analysis of forensic soil samples via high-performance liquid chromatography and ion chromatography

Traditional forensic soil comparisons are performed via physical and/or chemical examinations of color, texture, and mineral content, leaving any organic- or water-soluble fractions unexamined. This study uses high-performance liquid chromatography (HPLC) and ion chromatography (IC) to assess the qualitative and quantitative variation in these fractions of soil. Soil samples (n=120) were collected over the course of 3 weeks from urban, suburban, and rural locations in and around Lansing, MI. Additional samples from six of these locations (two urban, two suburban, and two rural) were collected once a week for 10 weeks for temporal analysis. Nine additional samples, equally spaced over a 1 m(2) grid, from these same six locations were collected for spatial analyses. Qualitative and quantitative analysis of the resultant chromatograms separated the 120 samples into 10 groups by HPLC and 23 groups by IC. This study shows that using HPLC and IC to analyze the organic- and water-soluble fractions of soil can successfully discriminate samples. Quantitative analysis of the results eliminates some false inclusions by providing further differentiation of samples. The results of this study indicate that adding HPLC and IC analyses to traditional forensic soil analysis schemes can improve overall sample differentiation. The methods used in this study were also able to detect both qualitative and quantitative variations in soil over a relatively small geographic area. This demonstration of soil heterogeneity underscores the importance of the collection of a representative known sample population when assessing a forensic soil comparison. Significant temporal variation was also demonstrated over the course of 10 weeks of sampling; however, samples were found to be consistent over shorter periods of time. Baseline levels of inorganic anions were determined via IC; these levels may be useful in assessing the significance of anions detected in soil from cases involving low explosives.     

Background survey of polyethylene in the Australian Capital Territory – A demonstration of variability in isotopic abundance values and their application to forensic casework

Plastics including adhesive tapes, cable ties, and packaging are common evidence types encountered in forensic investigations and casework. Traditional examination techniques such as Fourier Transform Infrared (FTIR) spectroscopy lack specificity and are unable to discern differences within the same polymer structures leaving the analyst with a generic identification. High quality manufacturing methods further amplify the limitations in detecting variability between samples. Isotope Ratio Mass Spectrometry (IRMS) has been shown to be a valuable technique in further discriminating plastics. Discrimination is achieved by analysing the relative abundances of stable isotopes within a sample, with differences detected in isotope ratios possibly attributed to the source of raw materials and fractionation during the manufacturing process. A survey of cling wraps and re-sealable zipper storage bags collected in the Australian Capital Territory was undertaken to assess the variability in carbon and hydrogen isotope ratios of different brands and samples. The results of this research are discussed, particularly with respect to within and between brand trends, and a case study is presented as an example of the value of including IRMS in a casework context.     

AFGHANISTAN: CROSSROADS OF THE ANCIENT WORLD (EXHIBITION ARTICLE)

A curtain-raiser by the curator of the Exhibition of Antiquities from Afghanistan, which opens at the British Museum on 3 March 2011. The exhibits come from the National Museum in Kabul and show the richness and extent of trade in ancient times through and with Afghanistan. They are from excavations at a number of sites, including Begram, Tilla Tepe and Ai Khanum.     

Reexamining Causes and Consequences: Does Administrative Intensity Matter for Organizational Performance?

ABSTRACT

This study examines the relationship between organizational structure (size and complexity) and administrative intensity and, subsequently, the effect of administrative intensity on organizational performance in the context of four-year institutions of higher education in the United States between 2003 and 2009. Organizational size has a negative effect on administrative intensity and supports the notion of economies of scale. Size and complexity also interact such that complexity has a greater effect on total administrative intensity in larger organizations. While administrative intensity has a nonlinear relationship with degree productivity, suggesting a tipping point of 30% total administration, it has little direct effect on graduation rates.     

Power,Politics, and Primitivism: West Papua's Struggle for Self-Determination

The Bush administration answered the terror attacks of September 11, 2001, with what it called the “global war on terror,” first the assault on and invasion of Afghanistan and then the invasion and occupation of Iraq. More and more Americans joined the opposition to the Iraq war, but for some, Afghanistan remained “the good war.” But was the war on Afghanistan ever a “good war”? The authors of Ending the US War in Afghanistan (Olive Branch Press, 2010) address these and other frequently raised questions in an easy-to-read style. The chapter reproduced here, “The War in Afghanistan Goes Global,” is one of six chapters in the pocket-sized book. Other chapters are “The USWar in Afghanistan,” “The US Invasion of Afghanistan,” “The US and Other Players in Afghanistan,” “The Impact of theWar,” and “Ending the War.”     

China’s international socialization of Caribbean state-society complexes: Trinidad and Tobago as a case study

ABSTRACT

Using the case study of Trinidad and Tobago, this article analyzes the process of reciprocal international socialization that allows Beijing to construct a cognitive and normative space conducive to a new regional order in the Caribbean which should be politically friendly, economically profitable, and socially open to its government, companies, and citizens. We argue that there has been a shift in the identity of Trinidad’s state-society complex due to the influence of China’s very visible political, economic, and social conditionalities. Their impact on political elites (which is reflected in government discourse and actions) and on the society at large (as shown by interviews with 30 Trinidadian nationals) is analyzed in order to show that Type I, ‘role playing’ socialization has been reached. However, frustration within Trinidad’s society with the domestic effects of China’s economic and social conditionalities clearly limits the potential for the evolution toward the more advanced Type II socialization exemplified, in the same region, by the Soviet-Cuban relationship. This suggests that, at least in the near future, key features of the Chinese approach incompatible with its self-proclaimed win-win nature will prevent Beijing from upgrading its status to that of a decisive socializer in the Caribbean.     

Virtual Babes: gender,archetypes and computer games

Thus a word or an image is symbolic when it implies something more than its obvious and immediate meaning. It has a wider “unconscious” aspect that is never precisely defined or fully explained — Carl Gustav Jung.     

The sublime and the cultures of the extreme: An exploration

Abstract

The article traces the relationship between the concept of the traditional sublime and the contemporary cultures of the extreme and their fascination with unlimitation. It is asked to what degree the aesthetic category of the sublime, generally defined as a ‘formlessness’, can assist in exploring and making sense of the cultures of the extreme. The cultures of the extreme are analysed by means of three tropes, namely the ecstasy of speed, the immersion into immediacy, and the shrinking of the natural landscape. By utilising these three tropes or hermeneutical tools, the author attempts to show how these events typify the contemporary obsession with extremes, and can indeed be likened to a pseudo-sublime or kitsch sublime.     

Intimate Partner Violence Among Hispanics: A Review of the Literature

This paper analyzed the existing literature on risk and protective factors for intimate partner violence among Hispanics using the four-level social-ecological model of prevention. Three popular search engines, PsycINFO, PubMed, and Google Scholar, were reviewed for original research articles published since the year 2000 that specifically examined factors associated with intimate partner violence (IPV) among Hispanics. Factors related to perpetration and victimization for both males and females were reviewed. Conflicting findings related to IPV risk and protective factors were noted; however, there were some key factors consistently shown to be related to violence in intimate relationships that can be targeted through prevention efforts. Future implications for ecologically-informed research, practice, and policy are discussed.     

Stressful Life Experiences and Peer Externalizing Behaviors Mediate the Relation Between Reduced Family Support and Externalizing Symptoms in Low-Income Urban Youth

Family support, urban stressors, and peer behavior were examined in relation to externalizing symptoms in 605 predominantly low-income urban sixth through eighth grade adolescents. Mother and father support were each associated with lower levels of externalizing symptoms in both males and females. For males, father absence was associated with increased peer externalizing behavior and heightened rates of youth externalizing symptoms. Stress (in the form of major life events, daily hassles, and exposure to violence) and peer externalizing behavior were examined as mediators of the relation between parent support and youth externalizing symptoms. Increased stress exposure mediated the relation between weak mother and father support and youth externalizing symptoms. Additionally, for females, peer externalizing behavior mediated the relation between weak mother support and youth externalizing symptoms.