Presence of periorbital and conjunctival petechial hemorrhages in accidental pediatric drowning

The pathological findings of drowning are variable and non-specific. Petechial hemorrhages involving the periorbital region and the conjunctiva have been described in many causes of death, but are thought to be exceedingly uncommon in cases of drowning. However, such studies have not specifically addressed the pediatric population. The current study retrospectively examined 79 cases of accidental pediatric drowning for the presence of periorbital/conjunctival hemorrhages and analyzed factors that may have affected their presence. Ten victims had periorbital/conjunctival petechial hemorrhages (13%), with five having periorbital petechiae, three having conjunctival petechiae, and two having both periorbital and conjunctival petechiae. The age and gender of the victim, site of drowning, resuscitation history and the presence of other pathological findings were not significantly associated with the presence of periorbital/conjunctival petechiae. However, as the interval between the drowning episode and autopsy increased, the incidence of periorbital/conjunctival petechiae decreased (28% for <24h; 7% for >24h). The presence of periorbital/conjunctival hemorrhages in a significant proportion of pediatric drowning victims confirms that the pathologist must add this finding to the spectrum of changes seen in pediatric drowning.     

Results of the 2018 Rapid DNA Maturity Assessment

Three commercially available integrated rapid DNA instruments were tested as a part of a rapid DNA maturity assessment in July of 2018. The assessment was conducted with sets of blinded single-source reference samples provided to participants for testing on the individual rapid platforms within their laboratories. The data were returned to the National Institute of Standards and Technology (NIST) for review and analysis. Both FBI-defined automated review (Rapid DNA Analysis) and manual review (Modified Rapid DNA Analysis) of the datasets were conducted to assess the success of genotyping the 20 Combined DNA Index System (CODIS) core STR loci and full profiles generated by the instruments. Genotype results from the multiple platforms, participating laboratories, and STR typing chemistries were combined into a single analysis. The Rapid DNA Analysis resulted in a success rate of 80% for full profiles (85% for the 20 CODIS core loci) with automated analysis. Modified Rapid DNA Analysis resulted in a success rate of 90% for both the CODIS 20 core loci and full profiles (all attempted loci per chemistry). An analysis of the peak height ratios demonstrated that 95% of all heterozygous alleles were above 59% heterozygote balance. For base-pair sizing precision, the precision was below the standard 0.5 bp deviation for both the ANDE 6C System and the RapidHIT 200.     

Shame and Non-suicidal Self-injury: Conceptualization and Preliminary Test of a Novel Developmental Model among Emerging Adults

Journal of Youth and Adolescence - Non-suicidal self-injury (NSSI) is particularly prevalent during adolescence and emerging adulthood. The salience of shame during these developmental periods...     

Character-building and freedom in education

Educators, parents, and policy-makers in the United States, as in other countries, are concerned about the apparent inability of many schools to contribute to the development of character and civic virtue in their pupils. The answer, experience shows, is not for government to require a pedagogy of state-defined character education which, in a pluralistic society, would inevitably create new conflicts. Instead, education policy should take advantage of the growing interest on the part of educators in creating autonomous, distinctive schools, and the continuing interest, on the part of parents, in being able to choose what school their children will attend. Schools which exhibit a distinctive character based upon a shared understanding of the goals of education are effective not only in teaching academics but also in developing positive character traits in their pupils. Charter schools and educational vouchers are two means of encouraging and supporting such coherent schools. The article concludes with a series of policy recommendations designed to balance the autonomy of schools against the need for public accountability. This revised version was published online in August 2006 with corrections to the Cover Date.     

Asian gangs in the United States: The current state of the research literature

Since the late 1980s, criminologists have been interestedin analyzing Asian gangs. Despite the rather sharp increasein books and articles published on the subject in the1990s, there appears to exist no consensus on the nature and etiologyof Asian gangs. This paper describes the current state ofresearch on Asian gangs and assesses whether or not thereis a dominant criminological theory on their cause. Itcompares and contrasts African American and Asian gangs,and closes with research and policy recommendations.     

Profligacy Or Prudence? Changes in Employment and Compensation of State and Local Government Workers

As the 1990s began, state and local governments across the country found themselves in a situation of fiscal stress. That stress has been attributed to several sources. Recently, it has been suggested that governments themselves brought on the fiscal squeeze by their own profligacy —a profligacy rooted in excessive increases in employment and compensation of government workers during the 1980s. After summarizing some arguments presented for and against describing state and local practices of the 1980s as profligate, this article compares its evidence on the growth of employment and compensation and notes some different interpretations. The article concludes that a strong statement of the profligacy position has not been proved.     

Identifying Fatal Head Injuries on Postmortem Computed Tomography Using Convolutional Neural Network/Deep Learning: A Feasibility Study

Postmortem computed tomography (PMCT) is a relatively recent advancement in forensic pathology practice that has been increasingly used as an ancillary investigation and screening tool. One area of clinical CT imaging that has garnered a lot of research interest recently is the area of “artificial intelligence” (AI), such as in screening and computer-assisted diagnostics. This feasibility study investigated the application of convolutional neural network, a form of deep learning AI, to PMCT head imaging in differentiating fatal head injury from controls. PMCT images of a transverse section of the head at the level of the frontal sinus from 25 cases of fatal head injury were combined with 25 nonhead-injury controls and divided into training and testing datasets. A convolutional neural network was constructed using Keras and was trained against the training data before being assessed against the testing dataset. The results of this study demonstrated an accuracy of between 70% and 92.5%, with difficulties in recognizing subarachnoid hemorrhage and in distinguishing congested vessels and prominent falx from head injury. These results are promising for potential applications as a screening tool or in computer-assisted diagnostics in the future.     

Continuous versus Categorical Models of Delinquency Risk

Two groups of participants, one a nationally representative sample with roughly equal numbers of male and female participants (N?=?8,984) and the other a sample of mostly male adjudicated delinquents (N?=?1,354), were used to test whether risk factors for delinquency are organized continuously or categorically. A continuous (variable-centered) model was created using factor scores from a one-factor confirmatory factor analysis and a categorical (person-centered) model was constructed using posterior probabilities from a two-class finite mixture modeling analysis. In both samples the continuous model correlated significantly better with subsequent offending than did the categorical model, a finding that was replicated in males from both samples and in females from the nationally representative sample. The current findings suggest that risk factors are better construed as points along a continuum rather than as properties of distinct groups or types. These results further suggest that the etiology of offending, in the form of risk factors, is general/additive rather than specific/selective. The implications of these results for theory development, clinical practice, and future research are discussed.