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Full bibliography 2,164 resources
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This paper shows how mathematical concepts can be displayed on World Wide Web pages. A few of the most interesting solutions are outlined although a few others are missing and a few more will be invented very soon. It is for authors to decide which system is the most suitable for their purposes.
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The kinetics of thermal degradation of ascorbic acid was studied in a Maltodextrin matrix at different temperatures between 75 and 140 °C. Isothermal experiments were performed with samples earlier equilibrated in environments of known aw at 4 °C, enclosed in hermetically sealed vials, with water contents (w) between 0.17 and 1.68 g water/g solids. Sampling times were selected according to an optimal experimental design in terms of minimum confidence regions of the parameters estimated, using the Bigelow model and estimates from preliminary experiments. The results showed a quadratic dependence of the reference D-value and linear dependence of the z-value with moisture content: Dr(140 °C) = 150.07 − 290.73w + 269w2 (min); z = 12.14 + 22.99w (°C) and showed the applicability of D-optimal designs for determining kinetic parameters in complex situations, with limited experimental requirements. The dependence of the rate constants with water content could not be described by the WLF model in qualitative terms, although in absolute values this model could be used with constants similar to those expected from glass transition theory. The thermodynamic analysis of the results showed a good application of the compensation theory in the whole range of water contents.
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Cross-cultural adaptation and validation of measures are necessary to provide evidence-based educational intervention services among children with autism spectrum disorder (ASD) across countries. Language plays an integral role in the cross-cultural adaptation and validation process of measures. Currently, there are limited validated tools in Chinese available to assess special education teachers' skills in functional behavior assessments and interventions in Mainland China to effectively support students with ASD. This study aimed to validate a Chinese version of the Skills and Needs Inventories in Functional Behavior Assessments and Interventions (SNI-FBAI-CN) in mainland China. The SNI-FBAI, originally developed and validated in Singapore, in the English language, was translated, culturally adapted, and then administered to 239 special education teachers in two schools for children with ASD in China. Results show that the SNI-FBAI-CN has a three-factor structure (i.e., skills in behavioral assessment, skills in behavioral interventions, and needs for training) that fits the data well, with good reliability for the overall scale, as well as the three subscales. Partial measurement invariance was established between the Chinese and the original Singapore samples, providing additional construct validity evidence for this tool. Limitations of this study and directions for future research are discussed.
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