Identification and age estimation of blood stains on colored backgrounds by near infrared spectroscopy

Non-destructive identification and subsequent age estimation of blood stains are significant steps in forensic casework. The latter can provide important information on the temporal aspects of a crime. As previously shown, visible spectroscopy of blood stains on white backgrounds can successfully be used for their identification and age estimation. The use of this technique however, is hampered by dark backgrounds. In the present study the feasibility to use near infrared (NIR) spectroscopy was evaluated for blood stain identification and age estimation on dark backgrounds. Using NIR reflectance spectroscopy, blood stains were distinguished from other substances with 100% sensitivity and 100% specificity. In addition, Partial Least Squares Regression analysis was applied to estimate the age of blood stains on colored backgrounds. The age of blood stains up to 1 month old was estimated successfully with a root mean squared error of prediction of 8.9%. These findings are an important step toward the practical implementation of blood stain identification and age estimation in forensic casework, where a large variety of backgrounds can be encountered.     

Forecasting Errors in the Averseness of Apologizing

Apologizing is often seen as the appropriate response after a transgression for perpetrators. Yet, despite the positive effects that apologies elicit after situations of conflict, they are not always delivered easily. We argue that this is due—at least in part—to perpetrators overestimating the averseness of apologizing, thus committing a forecasting error. Across two laboratory experiments and one autobiographical recall study, we demonstrate that perpetrators overestimate the averseness they will experience when apologizing compared to the averseness they experience when they actually apologize. Moreover, we show that this effect is driven by a misconstrual of the effects of an apology. Perpetrators overestimate the potentially negative effects of apologizing while simultaneously underestimating the potentially positive effects of apologizing. This forecasting error may have a negative effect on the initiation of the reconciliation process, due to perpetrators believing that apologizing is more averse than it actually is.     

Theorising European Integration of Local Government – Insights from the Fusion Approach

The article explores a new, dynamic conceptual framework to understand the relations between local government and the European Union (EU). It argues that, first, the fusion approach explains the systemic linkages between European integration and corresponding change within cities, counties and municipalities. Secondly, fusion dynamics are slowly emerging across European and local levels, whereby competencies and resources are merging and policies become synchronised under Europe 2020 and the European Cohesion Policy. Thirdly, the fusion approach provides an understanding of the attitudes of local actors towards European integration. In order to show the relevance of fusion, the article presents the findings of five empirical indicators: the absorption of EU policies and legislation; attention towards EU policies; institutional adaptation; EU-related action of local government and attitudes towards European integration. It also compares local government in two contrasting regions with regard to their political autonomy – North Rhine-Westphalia in Germany and the North West of England.     

On the autofluorescence of fingermarks

The autofluorescence of fingermarks is used for their detection. The components responsible for this autofluorescence are largely unknown. Thin layer chromatography and fluorescence spectroscopy were used to identify autofluorescent components and evaluate their forensic value. Based on our results, tryptophan is hypothesized to be a major contributor to the autofluorescence when part of peptides or proteins, id est, not in its free form. Part of the autofluorescence could be assigned to a kynurenine derivative. Pheophorbide A, a metabolite of chlorophyll, is inferred as a red fluorescent fingermark component. Chlorophyll is a plant pigment which implies that dietary information can potentially be retrieved from fingermarks.     

The Impact of Fiscal Decentralisation on Education and Other Types of Spending

Scholars have argued about the impact of fiscal decentralisation on public spending for a long time without coming to any firm theoretical and empirical conclusions. In contrast to earlier studies, this paper looks at the impact of fiscal decentralisation across different types of spending. The conventional wisdom of a “race to the bottom” in taxes and spending as a consequence of fiscal decentralization is juxtaposed to the recent literature on expenditure competition, which posits that expansive local competition results in higher spending in fiscally decentralized countries. We argue that the effects of fiscal decentralization should be seen most clearly for those types of policies which are provisioned mainly on the local/regional level. Empirically, we find a robust and positive association between fiscal decentralization and aggregate levels of education spending. However, when looking at public policies provided at the national level (e.g. pension policies), fiscal decentralisation is associated with lower levels of aggregate spending. The argument is tested empirically by means of cross‐sectional regressions as well as a pooled time series analysis of education, pension, social and total public spending in OECD countries from 1980 to 2001.     

How (Not) to Form a Progressive Alliance: Lessons from the History of Left Cooperation

Britain’s political parties can be divided into two blocs: a ‘progressive bloc’ of parties on the left/centre‐left, and a ‘reactionary bloc’ of those on the right/centre‐right. In three of the last four general elections, the progressive bloc won an appreciably larger share of the popular vote than its reactionary rival. Yet its greater internal fragmentation has been repeatedly punished under first past the post, leading to what is now over a decade of Conservative‐led governments. This has prompted growing pressure to form a ‘progressive alliance’ between Labour, Liberal Democrats, Greens, and their Scottish, Welsh and Northern Irish nationalist competitors. This article sheds a historical and international light on these demands, examining the difficulties other similar efforts at progressive cooperation have faced across the world. It considers how progressive alliances have previously sought to overcome geographical, ideological, and social divides between their constituent members, and draws some salutary lessons for British progressives today.     

Visualization of Latent Blood Stains Using Visible Reflectance Hyperspectral Imaging and Chemometrics

The detection of latent traces is an important aspect of crime scene investigation. Blood stains on black backgrounds can be visualized using chemiluminescence, which is invasive and requires a darkened room, or near-infrared photography, for which investigators need to change filters manually to optimize contrast. We demonstrated the performance of visible reflectance hyperspectral imaging (400–720 nm) for this purpose. Several processing methods were evaluated: single wavelength bands, ratio images, principal component analysis (PCA), and “SIMPLe-to-use Interactive Self-modeling Mixture Analysis” (SIMPLISMA). Using these methods, we were able to enhance the contrast between blood stains and 12 different fabrics. On black cotton, blood dilutions were visible with a minimal concentration of 25% of whole blood. The hyperspectral camera system used in this study is portable and wireless, which makes it suitable for crime scene use. The described technique is noncontact and nondestructive, so all traces are preserved for further analysis.