This novel approach to the analysis of multiexponential functions is based on the combined use of the Laplace transform and Padé approximants (Yeramian, E., and P. Claverie. 1987. Nature (Lond.). 326:169-174). It is similar in principle to the well-known Isenberg method of moments (Isenberg, I. 1983. Biophys. J. 43:141-148) traditionally applied to the analysis of fluorescence decay. The advantage of the Padé-Laplace method lies in its ability to detect the number of components in a multiexponential function as well as their parameters. In this paper we modified the original method so that it can be applied to the analysis of multifrequency phase/modulation measurements of fluorescence decay. The method was tested first on simulated data. It afforded recovery up to four distinct lifetime components (and their fractional contributions). In the case of simulated data corresponding to continuous lifetime distributions (nonexponential decay), the results of the analysis by the Padé-Laplace method indicated the absence of discrete exponential components. The method was also applied to real phase/modulation data gathered on known fluorophores and their mixtures and on tryptophan fluorescence in phospholipase A2. The lifetime and fraction recoveries were consistent with those obtained from standard methods involving nonlinear least-square fitting.
Introduction:The expectations that individuals hold about the future can influence the decisions they make toward achieving their goals. Existing research suggests that parents of autistic adolescents hold expectations about the future that are significantly related to the postsecondary outcomes they achieve. However, less research exists about the adolescents' own expectations and the extent to which autistic adolescents and their parents agree about the future. Methods: We used a scoring procedure to ''quantitize'' semi-structured interview data about what 46 adolescent-parent dyads envisioned for the future of the autistic adolescent across three areas of adulthood (postsecondary education, employment, and living situation). Adolescents ranged in age from 13 to 19 years (85.1% male) and were able to participate in a verbal interview. We scored the dyads' interviews on the extent to which they agreed or disagreed about the postsecondary future of the adolescent, as well as whose expectations were higher (when they differed). Results: Fewer than half (37.0%-47.8%) of adolescents and their parents partly or strongly agreed about their visions for the future in each of the three areas. Only 17.4% of dyads partly or strongly agreed across all three areas, and 23.9% did not agree in any area. When adolescents' and parents' views differed, adolescents were significantly more likely to have a higher expectation across all three areas ( p's < 0.01). Conclusions: Future research is needed to examine the differences in autistic adolescents' and parents' visions of the future, and to explore interventions to support families to work toward shared goals for the future. This study contributes to a growing body of literature emphasizing the importance of including the perspectives of autistic adolescents in research and for them to have an active and substantial role in their own transition planning.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.