Forensic utility of carbon isotope ratio variations in PVC tape backings

Forensic interest in adhesive tapes with polyvinyl chloride (PVC) backings (electrical tape) derives from their use in a variety of illicit activities. Due to the range of physical characteristics, chemical compositions, and homogeneity within a single roll of tape, traditional microscopic and chemical analyses can offer a high degree of discrimination between tapes, permitting the assessment of potential associations between evidentiary tape samples. The carbon isotope ratios of tapes could provide additional discrimination among tape samples. To evaluate whether carbon isotope ratios may be able to increase discrimination of electrical tapes, particularly with regards to different rolls of tape of the same product, we assessed the δ(13)C values of backings from 87 rolls of PVC-based black electrical tape (~20 brands, >60 products) Prior to analysis, adhesives were removed to prevent contamination by adhering debris, and plasticizers were extracted because of concern over their potential mobility. This result is consistent with each of these tapes having approximately the same plasticizer δ(13)C value and proportion of carbon in these plasticizers. The δ(13)C values of the 87 PVC tape backings ranged between -23.5 and -41.3 (‰, V-PDB), with negligible carbon isotopic variation within single rolls of tape, yet large variations among tape brands and tape products. Within this tape population, carbon isotope ratios permitted an average exclusion power of 93.7%, using a window of +/-0.3‰; the combination of carbon isotope ratio measurement with additional chemical and physical analyses raises the discrimination power to over 98.9%, with only 41 out of a possible 3741 pairs of tape samples being indistinguishable. There was a linear relationship between the δ(13)C value of tape backings and the change in δ(13)C value with the extraction of plasticizers. Analyses of pre- and post-blast tape sample pairs show that carbon isotope signatures are within 0.3‰ of pre-blast values, indicating that carbon isotope values are largely preserved during an explosion.     

MULTI‐LAYERED ACCOUNTABILITY. PERFORMANCE‐BASED FUNDING OF UNIVERSITIES

In most Western countries there has been an increasing demand for new and different types of audit, evaluation and reporting systems that reveal the output of public sector organizations ( Pollitt and Bouckaert 2000 ). Quality assessments have had a profound impact on the funding of university research, most visibly in the UK. However, the relationship between qualitative and quantitative indicators of research performance has been an ongoing source of debate ( Bence and Oppenheim 2004 ). By exploring four different types of accountability relations, this paper investigates different stakeholders' perceptions of whether or not performance funding increases accountability and transparency, and poses the following questions: Does performance funding result in high accountability and high transparency? Does high accountability imply high transparency? Does high transparency lead to low accountability? Three main empirical sources have been utilized: a comprehensive survey of faculty at Norwegian higher education institutions, a stakeholder survey, and data from case studies of four universities.     

The Programme de recherche en démographie historique: past,present and future developments in family reconstitution

The Programme de recherche en démographie historique (Historical Demography Research Programme) (PRDH), founded in 1966 and based at the Département de Démographie of the Université de Montréal, has since its inception featured a central project, a family reconstitution database of Quebec’s Catholic population from 1621 to 1799 named the Registre de la population du Québec ancien (Population Register of Historic Quebec) (RPQA). This article, which marks the fiftieth anniversary of the project, explores the development of the RPQA over the five decades in the context of similar international databases, explains the current state of the database as well as our record linkage methodology, describes an important collaboration now underway to build a larger Quebec historical data infrastructure, outlines new and renewed international collaborations, and summarizes research conducted using these data as well as future research possibilities. The particular geographic context, historical development and manageable colonial population size of Quebec favoured family reconstitution of the whole colony from the beginning of the project. Today, the RPQA comprises 438,193 individual biographies and 74,000 family files encompassing up to nine generations. To reconstitute families, we must identify and incorporate into the database all demographic events, including those whose existence can only be inferred through other sources. Future efforts to link nineteenth-century parish acts will need to deal with large case counts, mixed Catholic–Protestant marriages, and increased geographic and social mobility. The integration of complementary data will provide information on household co-residence, occupations, help track the destinies of mixed-religion persons and persons outside nuclear families and provide additional points of observation.     

China–Africa Exports: Governance Through Mobility and Sojourning

ABSTRACT

A centre for Asian and intercontinental immigration and export-oriented production, Guangzhou city is at the forefront of China’s global interactions. Based on ethnographic fieldwork, this article examines informal governance mechanisms that co-ordinate the circulation of goods and capital between China and Africa. The question addressed is: What roles do mobility and sojourning play in governing trade relations? The analysis is informed by research from three fields: economics scholarship on the trade–migration nexus, ethnographic studies of informal trans-border trade, and historical accounts of long-distance trade in pre-colonial and colonial eras. These traditions point to different ways in which the mobility of people and goods are interlinked. In the case of China–Africa interactions, the flow of goods has increased in tandem with the number of visits by African itinerant traders. The empirical discussion demonstrates that the emergence of intercontinental movements of goods and people between China and Africa was predicated on the brokering role played by African sojourners in Guangzhou. Of particular importance was informal hospitality and logistics infrastructure set up by Africans in the late 1990s, which subsequently evolved and adapted. This infrastructure has facilitated the mobility of people and goods and increased the pace at which trading capital circulates.     

Separation from Parents in Late Adolescence: The Same for Boys and Girls?

This study examined the way late adolescents separate from their parents. Emotional independence and conflictual independence toward mother and father were assessed. Emotional independence was defined as freedom from an excessive need for emotional support from the parents and conflictual independence as absence of guilt, mistrust, and anger toward parents. Students (18–22 years; N = 190) enrolled in higher education completed two scales of Hoffmann's Psychological Separation Inventory. Results indicated that girls more than boys need emotional support from their mothers (z = –3.101, p < .002). They express this need significantly more towards their mothers than towards their fathers (z = –4.194, p < .00003). The pattern of the girls' typical items demonstrated an ambivalence between reported dependence and demand for autonomy. The two types of independence (emotional and conflictual) were moderately correlated (r _s = .40). These findings support Gilligan's argument that connectedness plays a central role in the development of female adolescents. They speak for a multidimensional approach of the psychological separation process, which takes the type of independence and the children's and parents' gender into account.