Anatomical Placement of the Human Eyeball in the Orbit-Validation Using CT Scans of Living Adults and Prediction for Facial Approximation*

Abstract: Accuracy of forensic facial approximation and superimposition techniques relies on the knowledge of anatomical correlations between soft and hard tissues. Recent studies by Stephan and collaborators (6,8,10) reviewed traditional guidelines leading to a wrong placement of the eyeball in the orbit. As those statements are based on a small cadaver sample, we propose a validation of these findings on a large database (n = 375) of living people. Computed tomography scans of known age and sex subjects were used to collect landmarks on three‐dimensional surfaces and DICOM with TIVMI. Results confirmed a more superior and lateral position of the eyeball relatively to the orbital rims. Orbital height and breadth were used to compute regression formulae and proportional placement using percentages to find the most probable position of the eyeball in the orbit. A size‐related sexual dimorphism was present but did not impact on the prediction accuracy.     

Three-dimensional computer-assisted craniometrics: a comparison of the uncertainty in measurement induced by surface reconstruction performed by two computer programs

Digital investigation of anthropological material through computed tomography (CT) offers several new opportunities in morphometrics. However, an object measured with computer-assisted methods does not necessarily exactly match the original one. The scanning and surface reconstruction of the object induce some alterations, and data acquisition is prone to measurement uncertainty. The purpose of this research is to evaluate the intra- and inter-observers variations in medical CT scan measurements of a known-size phantom and two dry crania. Two software packages, AMIRA and Treatment and Increased Vision for Medical Imaging (TIVMI), which use different techniques of surface reconstructions, were compared. The mean difference between the measurements was lower for TIVMI, using an objective algorithm based on the half-maximum height (HMH) protocol in three dimensions (3D). AMIRA can induce up to a 4% error in known measurements and 5% uncertainty in dry skull measurements. This study emphasises the risk of object shape alteration in each step of its digitisation.     

The role of mobile computed tomography in mass fatality incidents

Mobile multi-detector computed tomography (MDCT) scanners are potentially available to temporary mortuaries and can be operational within 20 min of arrival. We describe, to our knowledge, the first use of mobile MDCT for a mass fatality incident. A mobile MDCT scanner attended the disaster mortuary after a five vehicle road traffic incident. Five out of six bodies were successfully imaged by MDCT in c. 15 min per body. Subsequent full radiological analysis took c. 1 h per case. The results were compared to the autopsy examinations. We discuss the advantages and disadvantages of imaging with mobile MDCT in relation to mass fatality work, illustrating the body pathway process, and its role in the identification of the pathology, personal effects, and health and safety hazards. We propose that the adoption of a single modality of mobile MDCT could replace the current use of multiple radiological sources within a mass fatality mortuary.     

Tullock challenges: happiness, revolutions, and democracy

Gordon Tullock is one of the most important of the founders and contributors to Public Choice. Two innovations are typical ??Tullock Challenges.?? The first relates to method: the measurement of subjective well-being, or happiness. The second relates to digital social networks, such as Facebook, Twitter, and to some extent Google. Both innovations lead to strong incentives by governments to manipulate the policy outcomes. In general, ??What is important will be manipulated by the government.?? To restrain government manipulation, one has to turn to Constitutional Economics and increase the possibilities for direct popular participation and federalism or introduce random mechanisms.     

Increasing pressure does not benefit lie detection: a reply to Ten Brinke et al. (2015)

When passively attending to suspects, observers are poor at distinguishing lies from truths. Deception research has therefore shifted to examining interview styles aimed at eliciting and enhancing deception cues. Based upon a literature review and three empirical studies, ten Brinke, L., Khambatta, P., and Carney, D. R. [2015. Physically scarce (vs. enriched) environments decrease the ability to successfully tell lies. Journal of Experimental Psychology: General, 144, 982–992. doi:10.1037/xge0000103] recommend increasing pressure on interviewees as it would increase lie detection accuracy. In this comment, we argue that these authors (1) misinterpret the literature when concluding that lie detection benefits from increasing pressure on interviewees, and (2) their data do not show that lie detection is more accurate when pressure is increased. In absence of such data, we recommend that increasing pressure on interviewees should be avoided: it hampers the elicitation of valuable information and can lead to false confessions.     

Against the odds—a free trade agreement between the European Union and Australia?

The European Union (EU) and Australia have embarked officially on a free trade agreement (FTA) negotiation process, a procedure expected to last no less than 5 years. Public pronouncements from both sides which announced the beginning of the process of negotiating an FTA marked a significant departure from the well-known tensions and difficulties which date back to the late 1950s. British entry into the then European Economic Community in 1973 meant that it had to align its trade policies with the much contested European Common Agricultural Policy (CAP). This had been implemented in the late 1960s and provided limitless reasons for antagonism between Australia and the EU. Yet, over time, the trade agenda changed for both sides with new actors and new agreements, and some of the previous machinery no longer providing the liberalisation of trade as intended. Both the EU and Australia have moved on—some of this change due to new political actors and new economic realities. Despite the tortured history between them, and mindful that some might be sceptical about this change of heart, real politik often imposes its own political will and the new needs may well be in sharp contrast to the past relationships. The prospect of an FTA shows how the trappings of history might be side stepped by a stronger, almost opportunistic, sense of economic benefits however small they might appear.     

Analysis of 2,4-Dinitrophenol in Postmortem Blood and Urine by Gas Chromatography–Mass Spectrometry: Method Development and Validation and Report of Three Fatalities in the United States

2,4-dinitrophenol (2,4-DNP) is a compound used in the early 1900s as a weight-loss drug but later prohibited due to its severe adverse effects, including death. It has however been attracting interest, due to its weight-loss properties, and appears to be re-emerging in forensic casework. As 2,4-DNP is available for use in industry and as a pesticide and easily accessible online, the dissemination of this drug can be fast. The compound exerts its effects through inhibition of ATP synthesis, and corresponding thermogenic energy loss which can be fatal. A method for qualitative and quantitative analysis of 2,4-DNP in blood and urine specimens using GC-MS with hydrogen as carrier gas is described. The method was validated and displayed acceptable performance parameters with linearity (R² higher than 0.998), inter-assay imprecision (lower than 10.6%), intra-assay imprecision (lower than 10.7%), and extraction efficiency (92.1%). Stability of 2,4-DNP in blood and urine was studied, and the drug was stable up to 30 days refrigeration or frozen. Six cases in United States suspected to be related to 2,4-DNP were analyzed. Three cases were found to be positive for 2,4-DNP. Concentrations of 2,4-DNP were in the range of 61.6–220 mg/L in urine and <3–114 mg/L in blood. Based on our findings, we suggest that medical examiners and forensic toxicologists be aware of the reappearance of 2,4-DNP, including this compound as a target in death investigations related to weight-loss drugs.     

Happiness and public choice

Measuring individual welfare using data on reported subjective well-being has made great progress. It offers a new way of confronting public choice hypotheses with field data, e.g., with respect to partisan preferences or rents in the public bureaucracy. Insights from public choice also help to assess the role of happiness measures in public policy. We emphasize that maximizing aggregate happiness as a social welfare function neglects incentive problems and political institutions while citizens are reduced to metric stations. The goal of happiness research should be to improve the nature of the processes through which individuals can express their preferences.     

Politicians' Opinions on Tax Reform

This paper examines politicians' stated preferences on tax reforms which aim to bring about a given change in revenue. The paper starts from a simple framework inwhich politicians are vote maximisers, analyses how disequilibria may affect tax choices and considers possible asymmetries in decisions. The empirical examination of the problem uses the stated preferences of 637 Flemish local politicians for both raising and lowering taxes by the same amount. Using multinomial logit estimation, symmetric and asymmetric effects are found and so the symmetry assumption underlying the standard approach is questioned in the analyses of tax choices.