The forensic analysis of thermal transfer printing

Thermal transfer printing refers to printing processes that utilize heat to produce an image by either physical or chemical means or by a combination of both. As the technology has improved and the supplies have become less expensive, the use of thermal printing in the personal and business markets has increased significantly. Specifically, dye diffusion thermal transfer and thermal mass transfer have become predominant in the production of counterfeit credit cards, drivers' licenses, and other types of documents produced on plastic media. Chemical analysis by means of thin layer chromatography (TLC) has proven to be useful in characterizing various types of inks (e.g., writing and inkjet inks). In this study, the authors examined 81 different samples that included a total of 54 printer samples (43 photographic prints on paper and eleven plastic card samples) and 27 printer ribbons. A new TLC method was developed and tested utilizing a solvent system (80% n-hexane, 3% methyl ethyl ketone, and 17% ethyl acetate) that is capable of producing excellent resolution.     

Object-oriented Bayesian networks for paternity cases with allelic dependencies

This study extends the current use of Bayesian networks by incorporating the effects of allelic dependencies in paternity calculations. The use of object-oriented networks greatly simplify the process of building and interpreting forensic identification models, allowing researchers to solve new, more complex problems. We explore two paternity examples: the most common scenario where DNA evidence is available from the alleged father, the mother and the child; a more complex case where DNA is not available from the alleged father, but is available from the alleged father’s brother. Object-oriented networks are built, using HUGIN, for each example which incorporate the effects of allelic dependence caused by evolutionary relatedness.     

What does Brexit Tell Us about Our Understanding of European Identity?

This paper reports on a number of Eurobarometer surveys undertaken by the European Commission as a way of reflecting on Brexit and the challenges it poses to European identity. Our work with the surveys has been undertaken in the context of developing an educational game (RU EU?) which will explore European identity. European citizenship and identity have been strongly promoted by the EU but, while they appear to have been accepted at an elite level, the EU—and the UK in particular—have so far not constructed a narrative which has been supported by ‘ordinary’ citizens. Brexit has therefore exposed the failings of European elites in this regard. That said, there is some evidence that the complexities of Brexit have led to a strengthening of European identity in the other EU 27 countries.