Precarious employment conditions affect work content in education and social work: results of work analyses

Work content is adversely affected by precarious employment conditions, with consequences for workers and clients/customers. Three examples are taken from professions involving long-term relations between workers and clients. Adult education teachers hired on short-term contracts to teach primarily immigrant populations prepare their courses under less favorable conditions than regular teachers and their employment context foments hostility among teachers. Special education technicians are hired on a seasonal basis which interferes with their ability to coordinate and plan their efforts in collaboration with teachers. Workers in shelters for women suffering conjugal violence who were hired on a casual or on-call basis were unable to follow up with women they helped during their shifts and more rarely engaged in one-on-one counseling. Precarious work contracts can affect mental health not only through employment insecurity but also through negative effects on the ability to do one's job and take pride in one's work, as well as weakening the interpersonal relationships on which successful, productive work depends.     

Engagement in after-school program activities: quality of experience from the perspective of participants

Middle school students’ experiences at after-school programs were compared as they participated in different types of activities and with different social partners. The students (N = 165) attended eight programs in three Midwestern states. A total of 1,596 experiences were randomly sampled using the Experience Sampling Method (ESM) during 1 week in the fall of 2001 and 1 week in the spring of 2002. Student engagement was conceptualized as the simultaneous experience of concentration, interest, and enjoyment. Students reported high levels of engagement while participating in sports activities and arts enrichment activities at the after-school programs, and low levels of engagement while completing homework at programs. They reported being more engaged in activities involving both adults and peers than activities with peers only. Concentrated effort, intrinsic motivation, and positive and negative mood states were also compared by program activities and social partners. Findings about participants’ subjective experiences and engagement in specific program activities have implications for understanding after-school programs as a context for youth development.

Chemistry in crime investigation: sodium percarbonate effects on bloodstains detection

Chemistry plays a leading role in crime investigation. In the study of bloodstains, chemical reactions provide the means for the detection. All these procedures have been thoroughly studied. However, recently, a new source of error has been found: washing stains with "active oxygen" detergents abrogates presumptive and human hemoglobin tests for bloodstains (although visible). The aim of this investigation was to evaluate the ability of pure sodium percarbonate-main component of detergents-to abrogate presumptive and human hemoglobin tests. Then, a solution to this problem could be found. The results demonstrate that pure sodium percarbonate-itself-is able to abrogate all tests, as well as the different degrees to which each of them is affected by the product. Consequently, faced with a stain of bloody appearance, even the preliminary tests are negative; it is advisable to analyze the DNA. Otherwise, the opportunity of obtaining valuable information is lost.     

Analysis of the Effect of Cyclophosphamide and Methotrexate on Chrysomya megacephala (Diptera: Calliphoridae),

Forensic entomotoxicology investigates the effects of chemical substances in the development of scavenger insects and the reflection on estimating the minimum postmortem interval (PMI). To evaluate the impact of the chemotherapeutic drugs cyclophosphamide (CF) and methotrexate (MTX) on the postembryonic development of Chrysomya megacephala, controlled experiments were performed by rearing the larvae on spiked minced beef with different concentrations of these drugs. The results indicated that CF significantly decreased their developmental rate up to 28 h but had no significant effect on larval and adult sizes, survival rate, and sex ratio, whereas MTX decreased larval and adult sizes, survival rate, and there was a deviation in the expected sex ratio toward females in MTX‐exposed larvae but had no significant impact on developmental rate. These negative interference factors should be considered in cases of suspected death of people that have undergone chemotherapy.     

Empirical evidence for AMBER alert as crime control theater: a comparison of student and community samples

While the AMBER Alert system is intended to facilitate the rescue of abducted children, it has practical and psychological limitations. Participants indicated their emotions and perceptions about Alerts before and after reading a vignette that manipulated details about a child abduction. Results indicate that the Alert system fits some criteria of Crime Control Theater (CCT). CCT polices are emotion-based legal actions that appear to address crime but fail to do so and have unintended consequences. Participants experienced panic about child abduction and believed the system is an effective tool which should be used no matter the unintended consequences. Emotions and panic positively related to perceptions of the system. Still, perceptions were not particularly positive, indicating that some participants recognize the system's limitations. Female and community participants generally had more positive perceptions than males and students, especially when experiencing high emotions or panic. Reading about an abduction reduced emotions overall and led to more positive perceptions (but only in the ‘AMBER Alert success’ condition). Reading about an ‘Alert failure’ did not affect perceptions. Results highlight the role of emotion in shaping perceptions of the system. As with other CCT policies, lawmakers should rely less on community sentiment and more on science when adopting legislation.     

Changes in illicit cocaine hydrochloride processing identified and revealed through multivariate analysis of cocaine signature data

For nearly 30 years, the methods utilized in illicit cocaine hydrochloride production have remained relatively consistent. Cocaine hydrochloride is typically produced one kilogram at a time. As a result, each individual kilogram is unique and distinct from other kilograms in any particular seizure based on the total alkaloid profile, occluded solvent profile, and isotopic signature. Additionally, multi-kilogram cocaine seizures are often comprised of cocaine from several different coca growing regions. There has been a documented shift in this type of processing based on the recent analysis of a large cocaine seizure in the Eastern Pacific. Signature analyses of samples from 21 kg randomly selected from a 517 kg seizure were virtually identical. Triplicate analyses of each sample via gas chromatography with flame ionization detection, static headspace gas chromatography mass spectrometry, and isotope ratio mass spectrometry were completed. An initial outlier evaluation of the data and an in-depth univariate analysis indicated there was no statistically significant difference among the 21 samples at the 95% confidence interval. Principal components analysis did reveal consistent minor deviations between the samples and known authentic data from the Nariño coca growing region of Colombia. These deviations were only observed on the latter principal components and could be explained by differences in solvent selection during cocaine hydrochloride processing. Chemical analyses in addition to a thorough statistical evaluation suggest a shift in the traditional small-batch method of cocaine processing to a multi-kilogram, high throughput approach.     

Development and Validation of a Method Using Dried Oral Fluid Spot to Determine Drugs of Abuse

A liquid chromatography–mass spectrometry method using dried oral fluid spots was developed and validated for the simultaneous quantification of cocaine, benzoylecgonine, cocaethylene, amphetamine, and 3,4‐methylenedioxymethamphetamine. The oral fluid was applied to a Whatman 903 grade paper and submitted to a drying time of 2.5 h. The extraction procedure was optimized by chemometric approach using simplex centroid design. Spots were extracted with a mixture of acetonitrile, buffer, and methanol. Calibration curves covered a linear concentration range of 40–500 ng/mL. Validation parameters of linearity, precision, accuracy, selectivity, carryover, matrix effects, and stability were evaluated and showed satisfactory results. Spot homogeneity was also satisfactory, with less than 15% of deviation from nominal concentration. Spot volume did not influence accuracy when less than 100 μL of the sample was applied to the spot. The validation of the proposed method suggests a potential application in different scenarios in toxicology.     

Causes of unexpected death in patients with multiple sclerosis: a forensic study of 50 cases

To determine the cause of death (as a result of neurologic or nonneurologic complications or accidents) in patients with multiple sclerosis (MS), we reviewed the autopsies of 50 subjects with MS from the Office of the Chief Medical Examiner of Maryland (OCME) between 1982 and 2004. The series included 32 females and 18 males (mean age, 45.8 years; range, 25-69 years) and the causes of death were classified into 3 categories: (A) neurologic complication directly related to MS; (B) nonneurologic complications or other medical causes; and (C) accidents, etc. Of the 50 cases, in 43 there was a history of MS, but in 7 subjects there was not, and the diagnosis was established by neuropathologic examination. In Group A, 21 (42%) cases, deaths were directly related to a neurologic complication; in Group B, 14 (28%) cases were related to the following nonneurologic and medical causes: ASCVD 9 (18%), metabolic disorder 1 (2%), pulmonary embolism 3 (6%), and bronchopneumonia 1 (2%); and in Group C, 15 (30%) cases, deaths were due to trauma, 9 (18%); intoxication, 5 (10%); and thermal injury, 1 (2%). Thus, among the 50 subjects, in 26, deaths occurred naturally; and in 24, from accidents, homicides, suicides, or undetermined causes. Pathologically, the majority of cases showed either chronic inactive (66.7%) or chronic active (15.6%) demyelinating lesions, mainly in the cerebral hemispheres. In some cases, it appears that demyelinating lesions, involving brain regions that regulate cardiorespiratory activity, could be considered as the immediate cause of death, but a large proportion appears to be due to other causes such as accidents and trauma. Thus, it seems likely that taking specific precautions could prevent some deaths in MS.     

Barriers to services for rural and urban survivors of rape

A significant proportion of survivors of rape do not utilize formal services to cope with the aftermath of rape. Understanding victimization experiences in environments that differ on resources, such as rural versus urban areas, may be an important dimension to consider in understanding barriers. Thirty women (18 rural and 12 urban) were recruited from rape crisis centers to participate in focus groups. Study results suggest that (a) survivors of rape experience many barriers to service utilization, (b) there were some differences in barriers to service utilization that were mentioned only in rural areas and some that were mentioned only in urban areas that may suggest that community context is important to consider in understanding barriers to service use, and (c) barriers to health and mental health services overlap with barriers to criminal justice system services.