The detection of metallic residues in skin stab wounds by means of SEM-EDS: A pilot study

The morphological analysis of stab wounds may often not be accurate enough to link it with the type of wounding weapon, but a further evaluation may be performed with the search for metallic residues left during the contact between the instrument and the skin. In this study, Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) was applied to the study of cadaveric stab wounds performed with kitchen knives composed of iron, chromium and nickel, in order to verify the presence of metallic residues on the wound's edge. Two groups of 10 corpses were selected: group A, including victims of stab wounds and a control group B (died of natural causes). Samplings were performed on the lesions and in intact areas of group A, whereas in group B sampling were performed in non-exposed intact skin. Samples were then analysed with optical microscopy and SEM-EDS. In group A, optical microscopic analysis showed the presence of vital haemorrhagic infiltration, while SEM-EDS showed evidence of microscopic metal traces, isolated or clustered, consisting of iron, chromium and nickel. Moreover, in two cases organic residues of calcium and phosphate were detected, as a probable sign of bone lesion. Control samples (group A in intact areas and group B), were negative for the search of exogenous material to optical microscopy and SEM-EDS. The results show the utility and possible application of the SEM-EDS in theidentification of metallic residues from sharp weapons on the skin.     

Male haplotypes and haplogroups differences between urban (Rimini) and rural area (Valmarecchia) in Romagna region (North Italy)

The distribution of Y chromosomal haplotypes and haplogroups in two different population samples from the Romagna region (North Italy) was performed. One population sample was collected in the urban area of Rimini, an ancient port in Roman age and the other one in the near and geographically more isolated rural area of Valmarecchia. Fast and slow evolving markers have been studied to infer population history and to analyse the microgeographic heterogeneity of Y chromosome in a Northern Italian region. Haplotype variability values compared to those observed in a Central Italy sample from the other side of Apennine mountains and in an Austrian population sample were very similar.     

Twenty-Two Ways to Lose a Debate: A Gricean Look at the <Emphasis Type="Italic">Nyāyasūtra</Emphasis>’s Points of Defeat

This paper is a study of debate practices as seen in the Nyāyasūtra and a number of commentaries. It concentrates on the ‘Points of Defeat’ (nigrahasthāna), i.e., those occasions that if met in debate would entail defeat. The conditions under which a debater would meet with defeat were discussed widely in India and have also attracted considerable attention from modern scholars. In order to better understand this subject, use is made of some of the intuitions about language and conversation that we owe to the philosopher H. P. Grice (1913–1988) as well as of some recent theoretical advances in argumentation theory and informal logic, particularly of those most influenced by Grice’s thought. The Points of Defeat are studied both individually and as a group and it is shown that they point towards the practice of debating as being a rational, cooperative and goal-directed activity.     

Fatal Drowning Accident and Undiagnosed Hydrocephalus

Abstract: Bodies found in water present several diagnostic challenges for the forensic examiner, such as the identification of the time and mechanism of death, the postmortem submersion time, and above all the circumstances of drowning. We report the case of a 33‐year‐old security guard found dead in Venice, in the water of the lagoon, who at autopsy presented a previously undiagnosed hydrocephalus with macrocephaly. The victim remained asymptomatic until 2 months before death and had never undergone a neurological or radiological examination. In the article, we emphasize the need to perform a thorough autopsy in all suspected drownings, discuss the etiopathogenesis of the neurological disease and hypothesize a possible relationship between the hydrocephalus and the drowning accident. Finally, we discuss the major clinical and forensic implications of macrocephaly and hydrocephalus in adults.     

Macroscopic,Microscopic, and Chemical Assessment of Gunshot Lesions on Decomposed Pig Skin

Abstract: Very little literature exists on gunshot wounds on decomposed material. In this study, seven pig heads underwent a shooting test. Entrance wounds from the first head underwent neutron activation analysis (NAA) and histological testing immediately after the firing test; the other six heads were exposed to two different environments (open air and soil) and analyzed by radiochemical and histological tests every 15 days. Gunshot wounds in air maintained their morphological characteristics, and those in soil showed severe alteration after 5 weeks. Microscopic testing verified positive results for lead in all gunshot wounds in open air, whereas in most of those in soil lead could not be detected. Radiochemical analysis performed by NAA yielded for all gunshot wounds but one antimony quantities in the range of 0.07–13.89 μg. In conclusion, it may be possible to detect residues of antimony even in degraded tissues.     

Risk aversion and bandwagon effect in the pivotal voter model

The empirical literature on the effects of opinion polls on election outcomes has recently found substantial evidence of a bandwagon effect, defined as the phenomenon according to which the publication of opinion polls is advantageous to the candidate with the greatest support. This result is driven, in the lab experiments, by a higher turnout rate among the majority than among the minority. Such evidence is however in stark contrast with the main theoretical model of electoral participation in public choice, the pivotal voter model, which predicts that the supporters of an underdog candidate participate at a higher rate, given the higher probability of casting a pivotal vote. This paper tries to reconcile this discrepancy by showing that a bandwagon effect can be generated within the pivotal voter model by concavity in the voters’ utility function, which makes electoral participation more costly for the expected loser supporters. Given the strict relationship between concavity and risk aversion, the paper also establishes the role of risk aversion as a determinant of bandwagon.     

A New Robust Epigenetic Model for Forensic Age Prediction

Forensic DNA phenotyping refers to an emerging field of forensic sciences aimed at the prediction of externally visible characteristics of unknown sample donors directly from biological materials. The aging process significantly affects most of the above characteristics making the development of a reliable method of age prediction very important. Today, the so-called “epigenetic clocks” represent the most accurate models for age prediction. Since they are technically not achievable in a typical forensic laboratory, forensic DNA technology has triggered efforts toward the simplification of these models. The present study aimed to build an epigenetic clock using a set of methylation markers of five different genes in a sample of the Italian population of different ages covering the whole span of adult life. In a sample of 330 subjects, 42 selected markers were analyzed with a machine learning approach for building a prediction model for age prediction. A ridge linear regression model including eight of the proposed markers was identified as the best performing model across a plethora of candidates. This model was tested on an independent sample of 83 subjects providing a median error of 4.5 years. In the present study, an epigenetic model for age prediction was validated in a sample of the Italian population. However, its applicability to advanced ages still represents the main limitation in forensic caseworks.     

Family farming in Brazil: evolution between the 1996 and 2006 agricultural censuses

This article compares the main findings of Brazilian agricultural census data of 1996 with the same of 2006 by applying the methodology known as ‘FAO/INCRA’ (Food Agriculture Organization/Instituto Nacional de Colonização e Reforma Agrária) which allows the characterization of family farms in relation to the total universe of farms. In this comparison several variables are shown, including the share of family farming in the total value of production, in the total number of farms, utilization of modern technology and partial factor productivity. Census data shows that family farming has changed from 37.91 percent of total production value to 36.11 percent during a decade of strong expansion of agriculture as a whole, demonstrating the economic relevance of this segment which, besides producing food, is integrated in the most important productive agricultural chains of the Brazilian agribusiness. Family farming is a heterogeneous segment, with different sub-segments. During the studied period of ten years the most rich of these sub-segments (A) has increased participation in total production, while the poorer sub-segments (C and D) have only grown in absolute terms without a corresponding increase in production.     

Sanctions and public opinion: The case of the Russia-Ukraine gas disputes

The Review of International Organizations - Economic sanctions usually fail, sometimes even provoking the opposite of the intended outcome. Why are sanctions so often ineffective? One prominent...     

Levelling the EU participatory playing field: A legal and policy analysis of the Commission's public consultations in light of the principle of political equality

The EU Commission has a long tradition of consulting interested parties when formulating its policies. While the rationale, format and legal basis relied upon by the Commission when holding public consultations have changed over time, its systematic inability to make those consultations equally accessible to all affected parties has remained constant. This article discusses the extent to which such a consultation practice conflicts with the principle of political equality, as enshrined in Article 9 TEU. Given the Commission's unrestrained discretion regarding who, how and when to consult and the absence of corresponding participatory rights, it argues that the EU can no longer presume that all stakeholders—especially citizens and civil society groups—enjoy equal access to EU institutions. Rather, under a proposed substantive reading of the principle of political equality, it contends that EU institutions are procedurally required to ensure that everyone will effectively be given equal opportunities of access to the policy process. Only a series of structural, power‐shifting reforms—some of which are proposed in this article—may enable participation to become an autonomous form of legitimation of the Union.