Freezing skeletal muscle tissue does not affect its decomposition in soil: Evidence from temporal changes in tissue mass,microbial activity and soil chemistry based on excised samples

The study of decaying organisms and death assemblages is referred to as forensic taphonomy, or more simply the study of graves. This field is dominated by the fields of entomology, anthropology and archaeology. Forensic taphonomy also includes the study of the ecology and chemistry of the burial environment. Studies in forensic taphonomy often require the use of analogues for human cadavers or their component parts. These might include animal cadavers or skeletal muscle tissue. However, sufficient supplies of cadavers or analogues may require periodic freezing of test material prior to experimental inhumation in the soil. This study was carried out to ascertain the effect of freezing on skeletal muscle tissue prior to inhumation and decomposition in a soil environment under controlled laboratory conditions. Changes in soil chemistry were also measured. In order to test the impact of freezing, skeletal muscle tissue (Sus scrofa) was frozen (?20 °C) or refrigerated (4 °C). Portions of skeletal muscle tissue (～1.5 g) were interred in microcosms (72 mm diameter × 120 mm height) containing sieved (2 mm) soil (sand) adjusted to 50% water holding capacity. The experiment had three treatments: control with no skeletal muscle tissue, microcosms containing frozen skeletal muscle tissue and those containing refrigerated tissue. The microcosms were destructively harvested at sequential periods of 2, 4, 6, 8, 12, 16, 23, 30 and 37 days after interment of skeletal muscle tissue. These harvests were replicated 6 times for each treatment. Microbial activity (carbon dioxide respiration) was monitored throughout the experiment. At harvest the skeletal muscle tissue was removed and the detritosphere soil was sampled for chemical analysis. Freezing was found to have no significant impact on decomposition or soil chemistry compared to unfrozen samples in the current study using skeletal muscle tissue. However, the interment of skeletal muscle tissue had a significant impact on the microbial activity (carbon dioxide respiration) and chemistry of the surrounding soil including: pH, electroconductivity, ammonium, nitrate, phosphate and potassium. This is the first laboratory controlled study to measure changes in inorganic chemistry in soil associated with the decomposition of skeletal muscle tissue in combination with microbial activity.     

Trauma Resilience Training for Police: Psychophysiological and Performance Effects

The objective of this study is to test the effects of police trauma resilience training on stress and performance during a critical incident police work simulation. Rookie police officers (N = 18) participated in a randomized trial of a 10-week imagery and skills training program versus training as usual. Twelve months later, psychophysiological stress and police work performance were assessed during a live critical incident simulation. Training resulted in significantly less negative mood, less heart rate reactivity, a larger increase in antithrombin, and better police performance compared to controls. Trends for cortisol and self-reported stress also suggested benefits of training. This novel training program is a promising paradigm for improving police well-being, stress resiliency, and optimizing job performance.     

Risk Factor Models for Adolescent Verbal and Physical Aggression Toward Fathers

Using a French-Canadian population-based longitudinal data set, we examine the impact of socioeconomic factors (paternal education and family structure); inherent individual factors (child gender and developmental trajectories of physical aggression from early to later childhood, problematic substance use), family environment (concurrent parent-child involvement, parental problematic substance use), and prospective and concurrent parenting process variables (mean parental supervision at puberty, concurrent punishment practices) as predictors of adolescent-directed aggression against fathers (in the last 6 months). A childhood behavioral pattern characterized by physical aggression showed the highest risk of adolescent-directed verbal and physical aggression toward fathers, regardless of sex. In terms of parental practices, verbal (and not corporal) punishment in the last 6 months significantly predicted aggression toward fathers. A childhood life-course of violence is likely to culminate in aggression toward fathers during adolescence. Beyond this risk, it seems that harsh verbal punishment by parents builds up the odds of child-directed aggression against fathers.     

26-Locus Y-STR typing in a Bhutanese population sample

26 Y chromosome short tandem repeat (STR) loci were amplified in a sample of 856 unrelated males from Bhutan, using two multiplex polymerase chain reaction (PCR) assays. The first multiplex is the Y-STR 20plex described by Butler et al. [J.M. Butler, R. Schoske, P.M. Vallone, M.C. Kline, A.J. Redd, M.F. Hammer, A novel multiplex for simultaneous amplification of 20 Y chromosome STR markers, Forensic Sci. Int. 129 (2002) 10-24], and the second is a novel (but overlapping) 14plex that targets six additional Y-STRs (DYS425, DYS434, DYS435, DYS436, DYS461, DYS462) and also amplifies the amelogenin locus. The 26-loci give a discriminating power of 0.9957, though even at this resolution one haplotype occurs 24 times. We identify novel alleles at five loci and microvariants at a further three, which were characterised by sequencing. Extended (11-locus) haplotypes for these samples have been submitted to the Y-STR Haplotype Reference Database (YHRD).     

The Dredd-Ful Day of Judgement: Judicial Models and the Twilight of the West

International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique - I am the Law It is hard to imagine two more disparate characters than Judge Joseph Dredd and...     

Apocalypse Now!: From Freud,Through Lacan,to Stiegler’s Psychoanalytic ‘Survival Project

International Journal for the Semiotics of Law - Revue internationale de Sémiotique juridique - The objective of this article is to explore the value of psychoanalysis in the early...     

The Roles of Women in Contemporary Political and Revolutionary Conflict: A Thematic Model

Global population-level patterns in female participation in contemporary political and revolutionary conflict remain largely unknown as systematic empirical research in the area is lacking. Accordingly, this study systematically documented the participation of a comprehensive sample of women involved in conflict around the world. A statistically derived model of female participation is proposed that consists of four thematic roles representing specific patterns of activity: active, representing fighting and leadership activities; caring, representing traditional feminine tasks; support, representing logistically based tasks, and; ideological, representing activities that propagate the ideology of the group. The contribution of the model to theory, research, and practice is considered.     

Deepwater or Troubled Water? Principal–Agent Theory and Performance-Based Contracting in the Coast Guard’s Deepwater Modernization Program

In the mid-1990s, the United States Coast Guard began planning a modernization effort known as the Deepwater program to replace an aging inventory of cutters, aircraft, and small boats. This effort involved a consortium of corporations to develop a “system of systems” to meet performance-based requirements and build the new equipment. This article examines the Deepwater program through the lens of multilayered principal–agent theory and evaluates the performance-based contracting (PBC) method used to alleviate strains linked to accountability from the principal–agent relationship. The findings help better understand the dilemmas prescribed from multilayered principal–agent theory and PBC by illustrating the accountability issues faced by smaller organizations when engaging in complex, large-scale procurement.