Browsing by Author "Li, S."
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Item Association between Posttraumatic Stress Disorder and Pre-flood Behavioral characteristics among Children Aged 7-15 years in Hunan, China(2011) Peng, M.; Liu, A.; Zhou, J.; Wen, S.; Li, S.; Yang, T.; Li, X.; Huang, X.; Abuaku, B.; Tan, H.Objective: To explore the relationship between posttraumatic stress disorder (PTSD) and preflood behavioral characteristics among children aged 7–15 years in Hunan, China. Subjects and Methods: In 2000, a retrospective study was carried out among children who had been exposed to the 1998 floods in Hunan. A multistage sampling method was used to select subjects from the flood-affected areas. A structured questionnaire administered to the children selected was used to diagnose PTSD based on the DSM-IV criteria. A parent questionnaire was used to measure preflood behavioral characteristics related to health, behavioral, and habit problems. The association between PTSD and preflood behavioral characteristics was assessed using χ2-tests and multivariate logistic regression. Results: A total of 7,038 children from 13,450 households, aged 7–15 years, were investigated. The overall prevalence of PTSD was 2.05%. Generally, the PTSD-positive rate increased with increasing scores for behavioral characteristics. Conclusion: Preflood behavioral characteristics are an important factor influencing the prevalence of PTSD among children exposed to floods. It is therefore necessary to give special attention to children with behavioral problems in order to reduce the psychological impact of floods.Item Entrapment of inclusions in continuous casting billet: Industrial observation and modeling(AIST – Association for Iron and Steel Technology, 2010) Wang, Y.; Zuo, X.; Zhang, L.; Li, S.; Dong, A.; Damoah, L.N.W.Item Mechanisms of inclusion removal from aluminum through filtration(TMS, 2008) Zhang, L.; Damoah, L.N.W.; Li, S.; Abebe, W.Ceramic Foam Filters (CFF) are used to remove inclusions from aluminium in laboratory experiments. Morphology and composition of inclusions in aluminium are identified using before and after filtration using optical microscope, SEM, XRD and EPMA. Qualitative analysis of results form various filtration experiments indicates that CFF filtration is an effective process to remove inclusions from molten aluminium. Interaction between inclusions and filter materials is investigated, which includes the effects of surface energy change before and after attachment, inclusion size, and fluid flow. Mechanisms of inclusion removal through filtration are then proposed. Both uncoated and slurry coated Al2O3 CFFs were found to have very good filtration efficiencies. However, qualitative analysis showed that the uncoated filter has more excellent filtration capabilities than the slurry coated filters.Item Morbidity and mortality among populations suffering floods in Hunan, China: the role of socioeconomic status(Journal of Food, Risk and Management, 2009) Abuaku, B.K.; Zhou, J.; Li, X.; Li, S.; Li, X.; Liu, A.; Yang, T.; Tan, H.A cross-sectional survey in randomly selected eight counties affected by the 1998 floods in Hunan, China, was conducted in year 2000 using a structured questionnaire. Data obtained included demographic and housing characteristics of subjects; family income; morbidity and mortality during and after the floods; and type and severity of flood suffered. Gender, age group, source of drinking water, type of flood suffered, and severity of flood suffered played highly significant roles in morbidity while gender, age group, educational level, family size, and type of flood suffered played highly significant roles in mortality among populations suffering floods. Intervention strategies in such populations need to take into account these characteristics with the view of reducing the health impact of floods.