Lifeguards: a forgotten aspect of drowning prevention

Abstract:

An alarming number of drownings occur in lifeguarded swimming areas, where one might presume swimmers are protected from injury. One reason drownings occur in lifeguarded swimming areas is because lifeguard surveillance is a highly difficult task. Observational research suggests lifeguards are usually alert, but researchers also report egregious examples of inattention. We offer three strategies that have initial empirical support to reduce risk of drowning at lifeguarded swimming areas: (a) regular training to help lifeguards recognize they are vulnerable to drowning events and to raise their confidence; (b) regular practice via simulated emergency responses, and (c) addressing staff schedules so lifeguards can devote full attention to protecting swimmer safety while on duty. ‎     

Increased Lung Weights in Drug‐related Fatalities

This study is of autopsy data for potential validation as to whether increased weights of the lungs support toxic effects of drugs as the cause of death. This retrospective study compared data from 133 deaths resulting from the toxic effects of drugs with previously reported normal lung weights (Toxicol Mech Methods, 22, 2012, 159; Am J Forensic Med Pathol 33, 2012, 368). The lung weights and their standard errors were used in a two‐sample independent t‐test comparing the average drug‐related death weight to the average control weights. To account for multiple comparisons, a Bonferroni‐adjusted alpha level of 0.0125 was used. We are 98.75% confident that the mean right lung weight for female drug‐related deaths is between 227 and 377 g greater than the mean right lung weight for female non‐drug‐related deaths. We are 98.75% confident that the mean right lung weight for male drug‐related deaths is between 245 and 378 g greater than the mean right lung weight for male non‐drug‐related deaths.     

Incapacity of the Mind Secondary to Medication Misuse as a Not Criminally Responsible Defense

The manifestations of disorders of the mind may play a role in the occurrence of criminal behavior. In the majority of the cases, the presence of a psychiatric disorder is cited as the reason that an individual was not fully aware of his behavior. However, other conditions, such as seizure disorders or hypoglycemia, have also been linked to an inability to understand the nature and consequences of one's actions. On occasion, these situations can be explained by a state of automatism that may be described as insane or noninsane. In this article, we describe the case of a 77‐year‐old man, suffering from Parkinson's disease, where the issue of criminal responsibility associated with incapacity of the mind secondary to medication misuse was raised. We elaborate on the thinking behind this opinion and the implications according to Canadian law. Although the legal outcome of this case is specific to our jurisdiction, the clinical implication may be common to any patient suffering from a similar condition and may inform physicians, families, and lawyers.     

Can Cephalometrics Discriminate Between the Sexes in a Diverse Juvenile Sample?

A critical component of the biological profile is sex estimation. Methods commonly used for sex estimation in adults do not work well for juveniles. Population‐specific studies have used cephalometrics to estimate juvenile sex with 80–90% accuracy. Our study attempts to estimate sex in individuals less than 18 years of age using a sample of 1618 lateral cephalograms incorporating all three Angle Class occlusions as well as population diversity. For the sample as a whole, 10 skeletal cephalometrics were found to have significant differences between the sexes. Males and females classify correctly about 50% of the time. Dividing the sample by age groups and race/ethnicity improves results for older age groups and Native Americans, Hispanics, and Asian Americans. Our results indicate that cephalometrics are not useful in determining sex of unidentified juveniles when age and race are not known.     

case Report —: BT HYPERLINK PATENT DISPUTE — DID BT INVENT THE HYPERLINK? OBVIOUSLY NOT AS THE US COURTS HAVE SAID SO

On 13 December 2000, British Telecom (BT) filed what must be one of the more unlikely patent infringement actions to have come before the courts recently. As a result of a routine review of its global patent portfolio, BT made the somewhat serendipitous discovery that it owns an old US patent which, according to BT, covers the concept of hyperlinking. The patent was granted in 1989 and is due to run until 2006. Similar patents were filed around the world, but have all now expired. This article explores the passage of the dispute in the US courts and explains how BT’s case came to flounder at the first hurdle.     

A simple DNA extraction method for marijuana samples used in amplified fragment length polymorphism (AFLP) analysis

As a first step in developing a molecular method for the individualization of marijuana samples, we evaluated a plant DNA extraction kit. The QIAGEN plant DNeasy method uses a spin column format for recovery of DNA and is effective for obtaining high molecular weight DNA from leaf, flower (bud), and seed samples of marijuana. The average DNA yield was 125-500 ng per 100 milligrams of fresh plant tissue. The recovered DNA was of polymerase chain reaction (PCR) quality as measured by the ability to generate reproducible amplified fragment length polymorphism (AFLP) profiles. AFLP is a technique used to create a DNA profile for plant varieties and is being applied to marijuana samples by the authors to link growers and distributors of clonal material. The QIAGEN plant DNeasy method was simple, efficient, and reproducible for processing small quantities of marijuana into DNA.     

Identification of Acer rubrum using amplified fragment length polymorphism

Amplified fragment length polymorphism (AFLP) analysis of botanical forensic evidence provides a means of obtaining a reproducible DNA profile in a relatively short period of time in species for which no sequence information is available. AFLP profiles were obtained for 40 Acer rubrum trees. Leaf material from five additional species was also typed. Genomic DNA was isolated using the DNeasy Plant Miniprep Kit (Qiagen, Valencia, CA), double-digested by two restriction endonucleases (EcoRI and MseI) and ligated to oligonucleotide adapters. Two consecutive PCR reactions (pre-amplification and selective amplification) were performed using a modification of the AFLP protocol described by Gibco (Invitrogen, Rockville, MD). The DNA fragments were separated by capillary electrophoresis using the CEQ 8000 DNA Fragment Analyzer. A number of Acer rubrum species-specific peaks were identified. In addition, within this closed set of samples, 15 of 16 (93.8%) blind samples were correctly identified. AFLP data can be used to determine the species of botanical evidence or to associate a sample to a source. This information can be used in forensic investigations to link a piece of evidence with a particular location or suspect.     

Making the Sexual Harassment of Others Self-Relevant: The Roles of Identity Salience and Value Affirmation

In three experiments, female participants were primed to think of themselves as female university students or unique individuals. We predicted that group-primed participants would find reading about the sexual harassment of a female student threatening to their self-concepts. However, if these participants could affirm an important value, the threat to their personal self-esteem might be resolved. Group-primed participants who wrote about an important individual value reported higher personal self-esteem in comparison with group-primed participants who did not. However, when group-primed participants wrote about a value important to their group, they did not report higher personal self-esteem in comparison to group-primed participants who lacked this opportunity. The results suggest that group-primed participants who affirmed an important individual value reported higher personal self-esteem because it allowed them to re-categorize themselves as unique individuals who were different from the female victim.

Conflict, Support and Coping as Mediators of the Relation Between Degrading Parenting and Adolescent Adjustment

Relatively few studies have examined psychological maltreatment as a risk factor for adolescent psychopathology. This cross-sectional study evaluated mother-adolescent conflict frequency, maternal support, and avoidant coping as mediators of relations between mother's degrading parenting and adolescent conduct problems and internalizing. Analyses were conducted to determine if relations between model constructs were influenced by reporter, gender, or ethnicity. The sample included 232 adolescents and their mothers. Household interviews were conducted with families who were randomly selected from two urban school districts. The proposed model was estimated using path analysis and generally fit the data well. Results suggested that mothers’ degrading parenting was associated with risk for internalizing and conduct problems, regardless of adolescent gender or ethnicity. Mother-adolescent conflict frequency mediated relations between mothers’ degrading parenting and adolescent adjustment. Maternal support and avoidant coping mediated relations between degrading parenting and internalizing when adolescent report was used.