Ho Chi Minh City Open University Journal of Science
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Is KWL Reading Strategy Effective in Enhancing College Students’ Reading Comprehension Skills?
No full textThis quasi-experimental study sets out to investigate the effect of the KWL reading strategy on developing freshman college students’ reading comprehension skills. The experimental group was subjected to an intervention based upon the application of the KWL reading strategy while reading expository texts, lasting for six weeks, whereas teaching reading was conducted traditionally in the control group. The effect of the implementation of the KWL reading strategy on the experimental group’s reading comprehension skills was assessed by administering pre- and post-reading tests. The findings obtained from the test results showed though the experimental group scored slightly higher on the post-test when compared to the control group, there was not a statistically significant difference between the groups. The inductive content analysis of the interview data revealed that the participants had positive conceptions of the strategy yet raised an issue concerning the time needed to answer the questions as applying it.</p
Occupational exposures and skin cancer incidence in six Swiss cantons
No full textObjectives: Most studies on occupational risk factors for melanoma have focused on ultra-violet radiation (UVR) exposure from outdoor work. This study investigates a broader range of occupational exposures including UVR, ionizing and non-ionizing radiation, benzene, poly- and monocyclic aromatic hydrocarbons, hexavalent chromium, nickel, coal tar, black carbon, ozone, soot and nitrous oxides with skin cancer in a working-age population-based prospective cohort. Methods: Adult residents (20 to 65 years) in the cantons of Fribourg, Ticino, Vaud, Valais, Neuchâtel, and Genève at the 2000 census were included (n = 1,077,487). Incident cases of primary melanoma and squamous cell carcinoma (SCC) of the skin were retrieved from cantonal cancer registries until 2012. Job-exposure matrices were used to assign exposures, using two assessment methods to explore exposure misclassification (i.e. conservative approach for main analyses vs. inclusive approach for sensitivity analyses). Cox proportional hazard models, with age as timescale and adjusted for demographic and environmental factors (residential radon, ambient UVR, and PM2.5 concentrations) were used to estimate hazard ratios (HR) in relation to each occupational exposure. Results: 2757 incident melanoma cases were observed during an average of 8.4 years follow-up. Occupational exposure to UVR and black carbon were associated with melanoma incidence (HR = 1.23; 95 % CI: 1.02–1.50 and HR = 1.59; 95 % CI: 1.18–2.13, respectively). Occupational exposure to ionizing radiation and ozone were only associated with melanoma when using the inclusive exposure assessment method. No associations were found for SCC incidence. Conclusion: UVR and air pollution in occupational settings were associated with melanoma incidence. Melanoma related to these risk factors is only recognized as an occupational disease in a few countries, while other occupational risk factors are largely neglected
