Validity of the use of porcine bone in forensic cut mark studies

Porcine bone is often used as a substitute for human bone in forensic trauma studies, but little has been published on its comparative mechanical behavior. The factors affecting mechanical properties and therefore selection of bone models are complex and include the age of the animal at death, and physiological loading conditions, the latter being of particular relevance when using a quadrupedal animal as a human substitute. The regional variation in hardness of adult and infant porcine bones was investigated using Vickers’ indentation tests and compared to published data for human limb bones to relate differences to inherent genetic effects and loading influences, and to examine the validity of the porcine‐human model. Significant differences in hardness were observed both along and around the adult porcine humerus and femur, but no significant differences were found along the length of the infant bones. Significant differences were found between the forelimb and hindlimb, but only in the infant specimens. The hardness values for porcine adult cortical bone from the femur (52.23 ± 1.00 kg mm^?2) were comparable to those reported in the literature for adult human cortical bone from the fibula, ilium, and calcaneus. These data will help inform subject selection in terms of both species and bone type for use in future trauma studies.     

Fictional power and control and the reality of abusive behaviour

In response to recent sociological studies that suggest that the seriousness of psychological, emotional and verbal abuse are not only dismissed but are also the least identified in dating relationships, this article undertakes an analysis of these underexplored, ‘less visible’, elements using Ellen Pence and Michael Paymar’s ‘Power and Control’ and ‘Equality’ wheels, it compares Stephanie Meyer’s 10th anniversary re-release of Twilight, and Life and Death: Twilight Reimagined, which tells the same story as Twilight, but with the genders reversed are compared using the ‘Power and Control’ and ‘Equality’ wheels. The author argues that Life and Death is not just a simple swap of names and pronouns, as Meyer asserts, but that the alterations of thoughts and actions of the characters reflect commonly held ideas about gender, including the perpetration of psychological, emotional and verbal abuse in intimate relationships as hallmarks of masculinity. Moreover it shows that consistent with the feminisation of vampire Edythe Cullen and mortal Beau Swan, the intimate relationship in Life and Death more closely resembles that of a non-violent and equitable relationship, which significantly lessens the abuse, and reinforces traditionally socially accepted messages about gender in intimate relationships.     

Longer Term Impact of Bystander Training to Reduce Violence Acceptance and Sexism

ABSTRACT

Many bystander programs to prevent violence have been developed and evaluated in college populations. An exception is the randomized controlled trial of Green Dot, found effective in reducing violence rates and violence acceptance in 26 high-schools (2010–2014). In ‘Life’s Snapshot’, 10,727 seniors were recruited from these same schools with the goal of determining the longer-term efficacy of bystander training. Students in intervention schools could have up to three years of Green Dot exposure. Seniors from intervention versus control schools had significantly lower scores (p <.01) indicating less violence acceptance or sexism for two of five measures. Seniors’ self-reports of bystander training received confirmed these findings. These cross-sectional analyses suggest that some reductions in violence acceptance associated with bystander programming may be maintained into early adulthood.     

The role of gender in officially reported intimate partner abuse

The role of gender in intimate partner abuse (IPA) perpetration and victimization has been debated for the last several decades. Two perspectives have emerged regarding this debate. Researchers from the family violence perspective argue that men and women are violent at near equal rates and call for a reframing of the issue from one of woman battering to one of family violence. In contrast, feminist researchers maintain that men make up the majority of perpetrators and women the majority of victims in cases of intimate partner abuse. While some have put forth arguments explaining these differences, this debate is far from over. Using official reported cases of IPA, this study examines 815 IPA cases of which 13% were female perpetrated in an attempt to clarify gender differences and similarities among male and female offenders beyond prevalence rates. Special attention is paid to contextual differences and similarities and implications this research has for future research and policy.     

Youth victimization: school climate or deviant lifestyles?

Despite much focus on school violence, there has been little research that explores the relationship between offending and victimization in various school climates. School climate theory suggests that the school's social system, culture, milieu, and ecological structure affect student outcomes including academic performance, delinquency, and more recently, victimization. Hierarchical analysis of data from 5,037 11th-grade students in 33 schools found that offending behavior was the strongest predictor for both minor and more serious forms of victimization. School climate, specifically the social cohesion of schools, reduced serious violent victimization risk. However, school climate did not affect the relationship between offending and victimization, and was not substantially modified when characteristics of the school environment were considered.     

Sexual dimorphism in human browridge volume measured from 3D models of dry crania: A new digital morphometrics approach

Sex estimation from the human skull is often a necessary step when constructing a biological profile from unidentified human remains. Traditional methods for determining the sex of a skull require observers to rank the expression of sexually dimorphic skeletal traits by subjectively assessing their qualitative differences. One of these traits is the prominence of the glabellar region above the browridge. In this paper, the volume of the browridge region was measured from digital 3D models of 128 dry crania (65 female, 63 male). The 3D models were created with a desktop laser scanner, and the browridge region of each 3D model was isolated using geometric planes defined by cranial landmarks. Statistical analysis of browridge-to-cranium volume ratios revealed significant differences between male and female crania. Differences were also observed between geographically distinct populations, and between temporally distinct populations from the same locale. The results suggest that in the future, sex determination of human crania may be assisted by quantitative computer-based volume calculations from 3D models, which can provide increased objectivity and repeatability when compared to traditional forensic techniques. The method presented in this paper can easily be extended to other volumetric regions of the human cranium.     

Current practices by forensic anthropologists in adult skeletal age estimation

When determining an age estimate from adult skeletal remains, forensic anthropologists face a series of methodological choices. These decisions, such as which skeletal region to evaluate, which methods to apply, what statistical information to use, and how to combine information from multiple methods, ultimately impacts the final reported age estimate. In this study, a questionnaire was administered to 145 forensic anthropologists, documenting current trends in adult age at death estimation procedures used throughout the field. Results indicate that the Suchey-Brooks pubic symphysis method (1990) remains the most highly favored aging technique, with cranial sutures and dental wear being the least preferred, regardless of experience. The majority of respondents stated that they vary their skeletal age estimate process case-by-case and ultimately present to officials both a narrow and broad possible age range. Overall, respondents displayed a very high degree of variation in how they generate their age estimates, and indicated that experience and expertise play a large role in skeletal age estimates.     

Canine scavenging of human remains in an indoor setting

This case study documents the nearly complete consumption of adult human remains by two domestic dogs (Canis familiaris) inside a residence. While scavenging behavior has been observed for coyotes, wolves, hyenas and other canines in natural outdoor environments, little information is available concerning canine scavenging of human remains in an indoor setting. In this case, the dogs were confined with the body inside a residence for approximately 1 month. The impact of intrinsic and extrinsic factors on canine scavenging behavior and the postmortem interval are examined, such as clothing on the body, perimortem trauma, drug ingestion and the availability of alternative food sources. While cases of canine scavenging of their owners are scant in the literature, this phenomenon is probably not uncommon, particularly among the elderly and indigent who live alone with pets and are socially isolated.