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Almost one-fourth of maltreated adolescents report they have thought about killing themselves in the last two weeks. We draw on Agnew's strain theory to develop a model to account for variability in suicidal thoughts among this high-risk group. We used data from a nationally representative sample of 572 maltreated adolescents, aged 11–15. One dimension of relational strain (poorer relationship with peers) and greater depressed mood were directly related to whether adolescents did or did not think about suicide. Depressed mood mediated the relationship between two strain variables (relationship with caregiver and with school) and suicidal thoughts. Child maltreatment strain (being severely harmed) and substance use were not directly related to suicidal thoughts; however, depressed mood appeared to mediate the relationship between drug use and suicidal thoughts. Adolescents who experience child maltreatment and who appear to be disconnected from caregivers, friends and school should be screened for depression and suicidal thoughts. 相似文献
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Susann L. Wurster 《Performance Improvement Quarterly》1997,10(3):104-108
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Puchberger-Enengl D Podszun S Heinz H Hermann C Vulto P Urban GA 《Biomicrofluidics》2011,5(4):044111-044111-10
In this contribution, we present a system for efficient preconcentration of pathogens without affecting their viability. Development of miniaturized molecular diagnostic kits requires concentration of the sample, molecule extraction, amplification, and detection. In consequence of low analyte concentrations in real-world samples, preconcentration is a critical step within this workflow. Bacteria and viruses exhibit a negative surface charge and thus can be electrophoretically captured from a continuous flow. The concept of phaseguides was applied to define gel membranes, which enable effective and reversible collection of the target species. E. coli of the strains XL1-blue and K12 were used to evaluate the performance of the device. By suppression of the electroosmotic flow both strains were captured with efficiencies of up to 99%. At a continuous flow of 15 μl/min concentration factors of 50.17 ± 2.23 and 47.36 ± 1.72 were achieved in less than 27 min for XL1-blue and K12, respectively. These results indicate that free flow electrophoresis enables efficient concentration of bacteria and the presented device can contribute to rapid analyses of swab-derived samples. 相似文献
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ABSTRACT At Eastern Michigan University, information about library resources and services for Extended Programs (off-campus and online) students was provided in a number of online locations and was sometimes inconsistent and difficult to manage. The library formed an internal task force to evaluate all of the library information and instructional materials provided to Extended Programs students. The task force consolidated key information in one location on the library Web site and collaborated with departments within the library and around campus to provide links from the relevant online locations. This case study describes how Google Analytics was used to assess the use of the revised library Web site and online instructional materials by Extended Programs students. The researchers describe examples of techniques for using Google Analytics and explain how the data collected was used to identify further enhancements to the information provided to Extended Programs students. 相似文献
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