False-negative probability in the SEM/EDS automated discovery of iGSR particles: A Bayesian approach

The automated search software integrated with a scanning electron microscope (SEM/EDS) has been the standard tool for detecting inorganic gunshot residues (iGSR) for several decades. The detection of these particles depends on various factors such as collection, preservation, contamination with organic matter, and the method for sample analysis. This article focuses on the influence of equipment resolution setup on the backscattered electron images of the sample. The pixel size of these images plays a crucial role in determining the detectability of iGSR particles, especially those with sizes close to the pixel size. In this study, we calculated the probability of missing all characteristic iGSR particles in a sample using an SEM/EDS automated search and how it depends on the image pixel resolution setup. We developed and validated an iGSR particle detection model that links particle size with equipment registers and applied it to 320 samples analyzed by a forensic science laboratory. Our results show that the probability of missing all characteristic iGSR particles due to their size is below 5% for pixel sizes below 0.32 μm². These findings indicate that pixel sizes as large as twice the one commonly used in laboratory casework, that is, 0.16 μm², are effective for initial sample scanning, yielding good detection rates of characteristic particles that could exponentially reduce laboratory workload.     

Basic Social Rights, Constitutional Justice, and Democracy

Abstract.   The theory of rights is crucial as a means of relieving the tension between basic rights and democracy, and as a means of resolving the problem of allocating competence between the constitutional court and the legislature. To some theorists, no tension between basic rights and democracy exists, for the latter presupposes the former. To others, among whom I include myself, tension does exist, for basic rights, in lending protection to certain persons and groups, limit the possibilities of political decision. In this connection it is important to take up the problem of the necessary conditions for realizing basic rights. One of these conditions concerns the delimiting of the scope of institutional action that is found, so to speak, in the space between the constitutional justices and the legislature, the latter as representative of the popular will.     

Will there be a new ASEAN in the 21st century?

Asia Europe Journal -     

Tests of one Brazilian facial reconstruction method using three soft tissue depth sets and familiar assessors

Facial reconstruction is a method that seeks to recreate a person's facial appearance from his/her skull. This technique can be the last resource used in a forensic investigation, when identification techniques such as DNA analysis, dental records, fingerprints and radiographic comparison cannot be used to identify a body or skeletal remains. To perform facial reconstruction, the data of facial soft tissue thickness are necessary. Scientific literature has described differences in the thickness of facial soft tissue between ethnic groups. There are different databases of soft tissue thickness published in the scientific literature. There are no literature records of facial reconstruction works carried out with data of soft tissues obtained from samples of Brazilian subjects. There are also no reports of digital forensic facial reconstruction performed in Brazil. There are two databases of soft tissue thickness published for the Brazilian population: one obtained from measurements performed in fresh cadavers (fresh cadavers' pattern), and another from measurements using magnetic resonance imaging (Magnetic Resonance pattern). This study aims to perform three different characterized digital forensic facial reconstructions (with hair, eyelashes and eyebrows) of a Brazilian subject (based on an international pattern and two Brazilian patterns for soft facial tissue thickness), and evaluate the digital forensic facial reconstructions comparing them to photos of the individual and other nine subjects. The DICOM data of the Computed Tomography (CT) donated by a volunteer were converted into stereolitography (STL) files and used for the creation of the digital facial reconstructions. Once the three reconstructions were performed, they were compared to photographs of the subject who had the face reconstructed and nine other subjects. Thirty examiners participated in this recognition process. The target subject was recognized by 26.67% of the examiners in the reconstruction performed with the Brazilian Magnetic Resonance Pattern, 23.33% in the reconstruction performed with the Brazilian Fresh Cadavers Pattern and 20.00% in the reconstruction performed with the International Pattern, in which the target-subject was the most recognized subject in the first two patterns. The rate of correct recognitions of the target subject indicate that the digital forensic facial reconstruction, conducted with parameters used in this study, may be a useful tool.     

Forensic Facial Reconstruction: Relationship Between the Alar Cartilage and Piriform Aperture

During forensic facial reconstruction, facial features may be predicted based on the parameters of the skull. This study evaluated the relationships between alar cartilage and piriform aperture and nose morphology and facial typology. Ninety‐six cone beam computed tomography images of Brazilian subjects (49 males and 47 females) were used in this study. OsiriX software was used to perform the following measurements: nasal width, distance between alar base insertion points, lower width of the piriform aperture, and upper width of the piriform aperture. Nasal width was associated with the lower width of the piriform aperture, sex, skeletal vertical pattern of the face, and age. The current study contributes to the improvement of forensic facial guides by identifying the relationships between the alar cartilages and characteristics of the biological profile of members of a population that has been little studied thus far.     

Risk Factors of Violence against Women in Peru

Based on the results of previous investigations, this study seeks for individual, relationship and community characteristics among women living with their partner associated with intimate partner violence [IPV] victimization. The sample of 19,131 women was taken from the 2016 Peru Demographic and Health Survey. A binomial logistic regression model showed among the most significant risk factors: heavy drinking by the woman’s partner (OR = 8.655, p < .001), having witnessed parental domestic violence (OR = 1.496, p < .001) and having experienced physical punishment during childhood (OR = 1.306, p < .001). Other factors related to higher odds of IPV at the individual level include employment and low educational attainment. Relationship risk factors comprise, 25 to 29 years of relationship duration, living in cohabitation, previous unions and low socioeconomic status. At the community level, living in an urban residence increases the likelihood of abuse. These findings highlight the need to include these factors, in the IPV prevention strategies.     

Forensic Facial Approximation: Study of the Nose in Brazilian Subjects

Forensic facial approximation is an auxiliary method for human identification and allows facial recognition. The midface, that includes the nose, is vital for the recognition of a familiar face. The purpose of this study was to set hard tissue parameters to estimate nasal width, to test the method to estimate nasal width of Brazilians, and to analyze the relationship between nasal profile and facial type. A total of 246 computed tomography scans (183 females and 63 males) of adults were analyzed in Horos. Bone tissue measurements and facial type classification were performed on the skull scan. Nasal profile morphology was accessed through the tool 3D surface rendering. There was a difference around 3 mm from real to predicted nose through the method to estimate nasal width in Brazilians. So, the method may be used in forensic practice. Straight nose was associated with long face type.     

The feasibility of a desirable minimal state

Dwight Lee (1989) argues on utilitarian grounds that the minimal state of classical liberalism cannot be both desirable and feasible: if desirable, it is not attainable; if attainable, it is not desirable. Lee's article provides an intriguing new perspective on the long debate about the optimal size of government. His conclusions, however, do not hold if some of his restrictive assumptions are relaxed. In a more general model, the minimal state can be both desirable and feasible.