Survival of Atherosclerotic Calcifications in Skeletonized Material: Forensic and Pathological Implications

Atherosclerosis is a chronic inflammatory disease creating calcifying plaques in the arterial walls. Because its paleopathological diagnosis remains little studied on skeletal remains, its impact on forensic and archeological data is completely underestimated. Here, 24 skeletal remains from the Milano Cemetery Skeletal Collection have been studied to evaluate the chance of atherosclerotic calcification survival, retrieval, and identification. Through direct comparison with a known autopsy collection and literature, the identification and categorization of several types of calcifications were performed. Clothing elements such as tights or socks played a definitive role in the preservation of the calcifications; hence they are more likely to be found in forensic cases than in archeological ones. Therefore, vascular calcifications are possible to collect and identify in skeletal remains if sufficient care is given to their recovery. Consequently and as markers of the disease, such identification can provide valuable pathological information for forensic and archeological cases.     

Histological Determination of the Human Origin of Bone Fragments

Abstract:  A frequently encountered task in the forensic scenario is verification of the human origin of severely degraded fragments of bone. In these cases histological methods which consider osteon size and morphology can prove to be useful. The authors in the present study verify the applicability of published algorithms to flat and subadult bones from human, dog, cat, cow, rabbit, sheep, pig, chicken, quail, and turkey samples. Metric analysis was performed on 2031 Haversian canals. Analyses carried out on human samples confirmed a success rate of around 70% on long adult bones; however the percentage of wrong answers was particularly high in the case of newborns and older subadults as well as on flat bones in general. Results therefore suggest that such regression equations should be limited only to bone fragments from long adult bones.     

The difficult issue of age assessment on pedo-pornographic material

The issue of juvenile pornography has seen an increase in the past few years of the number of expert opinions requested to forensic pathologists, paediatricians and other various experts within the forensic and medical fields concerning the age of represented individuals. Regardless of the entity of the problem, no actual method exists which can allow us to give an objective and scientific answer, particularly in the postpubertal stage. Using parameters related to sexual maturation can be very dangerous. Nonetheless some experts still insist with similar types of “expertises”. This study aims at verifying the ability of different experts in assessing age of postpubertal individuals represented in pornographic material. Results underline the difficulties and major uncertainties of age evaluation by visual observation of photographic material particularly when the subjects have reached the sexual maturation stage – and therefore in verifying whether the individual is above or below 18 years of age (an important age limit for most European countries as far as this type of crime is concerned). Furthermore the study stresses the need both to search for an alternate approach and to apply extreme caution in judicial evaluation.     

Nudging with care: the risks and benefits of social information

Nudges are popular types of interventions. Recent years have seen the rise of ‘norm-nudges’—nudges whose mechanism of action relies on social norms, eliciting or changing social expectations. Norm-nudges can be powerful interventions, but they can easily fail to be effective and can even backfire unless they are designed with care. We highlight important considerations when designing norm-nudges and discuss a general model of social behavior based on social expectations and conditional preferences. We present the results of several experiments wherein norm-nudging can backfire, and ways to avoid those negative outcomes.

     

Age Estimation Based on DNA Methylation Using Blood Samples From Deceased Individuals

Age estimation using DNA methylation levels has been widely investigated in recent years because of its potential application in forensic genetics. The main aim of this study was to develop an age predictor model (APM) for blood samples of deceased individuals based in five age-correlated genes. Fifty-one samples were analyzed through the bisulfite polymerase chain reaction (PCR) sequencing method for DNA methylation evaluation in genes ELOVL2, FHL2, EDARADD, PDE4C, and C1orf132. Linear regression was used to analyze relationships between methylation levels and age. The model using the highest age-correlated CpG from each locus revealed a correlation coefficient of 0.888, explaining 76.3% of age variation, with a mean absolute deviation from the chronological age (MAD) of 6.08 years. The model was validated in an independent test set of 19 samples producing a MAD of 8.84 years. The developed APM seems to be informative and could have potential application in forensic analysis.     

Evaluating the forensic informativeness of mtDNA haplogroup H sub-typing on a Eurasian scale

The impact of phylogeographic information on mtDNA forensics has been limited to the quality control of published sequences and databases. In this work we use the information already available on Eurasian mtDNA phylogeography to guide the choice of coding-region SNPs for haplogroup H. This sub-typing is particularly important in forensics since, even when sequencing both HVRI and HVRII, the discriminating power is low in some Eurasian populations. We show that a small set (eight) of coding-region SNPs resolves a substantial proportion of the identical haplotypes, as defined by control-region variation alone. Moreover, this SNP set, while substantially increasing the discriminating efficiency in most Eurasian populations by roughly equal amounts, discloses population-specific profiles.     

The Role of Legitimizing Ideologies as Predictors of Ambivalent Sexism in Young People: Evidence from Italy and the USA

The studies presented here focus on the relationship between legitimizing ideologies and ambivalent sexism. 544 Italian students (Study 1) and 297 US students (Study 2) completed several scales: social dominance orientation (SDO), system justification (SJ), political orientation, religiosity, and the Glick and Fiske (J Pers Soc Psychol 70(3):491–512, 1996) Ambivalent Sexism Inventory. Zero-order correlations revealed all facets of ideological attitudes to be positively related to each other and correlated with ambivalent sexism. In particular, the SDO was related to both ideology components of SJ and political orientation and to ambivalent sexism (hostile and benevolent). Moderated regressions revealed that SDO has a positive impact on hostile sexism for men only, while SJ has a positive impact on hostile sexism for women only. While the first result was stable across the two studies, the last moderated effect has been detected only in Study 1. We discuss the results with respect to different facets of social ideologies and cultural differences between the two countries.     

Cyberstalking versus off-line stalking in a forensic sample

There is relatively little empirical research into cyberstalking and most published research reports data from samples of cyberstalking victims. The current study aimed to fill a gap in the literature by comparing 36 cyberstalking offenders with an age and gender matched sample of 36 off-line stalkers (average age 37 years, 94% male) to investigate differences in demographic, clinical and behavioural characteristics. Non-parametric analyses showed few between-group differences, although cyberstalkers were more likely to be ex-intimate partners (75% vs. 47%, χ² = 5.84, p = .02, φ = .28) and less likely to approach their victims (56% vs. 78%, χ² = 4.00, p = .05, φ = ?.24). The majority of cyberstalkers also used off-line stalking tactics. Examination of specific cyberstalking behaviours suggested that cyberstalkers with different motivations used the Internet in distinct ways. These results support broad conclusions from previous research indicating that there are relatively few differences between cyberstalkers and off-line stalkers. Once the motivation of the stalker is considered, treatment and management strategies for cyberstalking and off-line stalking are likely to be similar.     

Differential adoption of modern rice technology and regional wage differential in Nepal

In Nepal, which consists of ecologically distinct regions, the concentration of the adoption of modern rice varieties in the favourable rice growing areas of the country has raised fears that regional income disparities have widened. This study shows that greater demand for hired labour due to the adoption of modern rice varieties has induced permanent and seasonal migration from unfavourable to favourable areas. This appears to have largely equalised average wage rates across different production environments. Thus, as far as labour income is concerned, benefits from the modern varieties have been widely shared.