Assessment of a satellite power system and six alternative technologies

The satellite power system is assessed in comparison to six alternative technologies. The alternatives are: central-station terrestrial photovoltaic systems, conventional coal-fired power plants, coal-gasification/combined-cycle power plants, light water reactor power plants, liquid-metal fast-breeder reactors, and fusion. The comparison is made regarding issues of cost and performance, health and safety, environmental effects, resources, socio-economic factors, and institutional issues. The criteria for selecting the issues and the alternative technologies are given, and the methodology of the comparison is discussed. Brief descriptions of each of the technologies considered are included

An examination of the impacts of volunteering and community contribution at a community festival through the lens of the Five Ways to Wellbeing

The aim of this study was to examine the perceptions, motivations and wellbeing impacts for volunteers and contributors to Broadstairs Folk Week. The study utilised questionnaires with a mix of quantitative and qualitative measures, within a single cohort (n = 152). Analysis was conducted using IBM SPSS 24 to produce descriptive statistics, and cross-tabulations were used to interrogate key variables. NVivo 11 software was used to analyse qualitative comments. A thematic analysis (thematic development) approach further identified codes and themes that fitted well with the Five Ways to Wellbeing (Aked, J., Marks, N., Cordon, C. and Thompson, S. (2008). Five ways to wellbeing: a report presented to the Foresight Project on communicating the evidence base for improving people's well-being, New Economics Foundation. Retrieved from https://b.3cdn.net/nefoundation/8984c5089d5c2285ee_t4m6bhqq5.pdf). Findings demonstrate that older-adult festival volunteers had a higher sense of subjective wellbeing prior to the festival than might ordinarily be expected in a similar group. Participants reported their sense of wellbeing increased during the festival. The Five Ways to Wellbeing model is suggested as a useful way to frame the results, linking a sense of 'connection' and 'giving' as participant motivators. This paper argues that festival volunteers derive personal benefits, including sense of connection and reciprocity, and access to resources with potential health and wellbeing benefits. This may be beneficial to the public health agenda of community development, reducing isolation and supporting healthy ageing. The online version contains supplementary material available at 10.1007/s42413-021-00154-2. [Abstract copyright: © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021.

Semiparametric approach to characterize unique gene expression trajectories across time

BACKGROUND: A semiparametric approach was used to identify groups of cDNAs and genes with distinct expression profiles across time and overcome the limitations of clustering to identify groups. The semiparametric approach allows the generalization of mixtures of distributions while making no specific parametric assumptions about the distribution of the hidden heterogeneity of the cDNAs. The semiparametric approach was applied to study gene expression in the brains of Apis mellifera ligustica honey bees raised in two colonies (A. m. mellifera and ligustica) with consistent patterns across five maturation ages. RESULTS: The semiparametric approach provided unambiguous criteria to detect groups of genes, trajectories and probability of gene membership to groups. The semiparametric results were cross-validated in both colony data sets. Gene Ontology analysis enhanced by genome annotation helped to confirm the semiparametric results and revealed that most genes with similar or related neurobiological function were assigned to the same group or groups with similar trajectories. Ten groups of genes were identified and nine groups had highly similar trajectories in both data sets. Differences in the trajectory of the reminder group were consistent with reports of accelerated maturation in ligustica colonies compared to mellifera colonies. CONCLUSION: The combination of microarray technology, genomic information and semiparametric analysis provided insights into the genomic plasticity and gene networks linked to behavioral maturation in the honey bee

Education in Time: Cohort Differences in Educational Attainment in African-American Twins

OBJECTIVES:Educational opportunities for African-Americans expanded throughout the 20(th) century. Twin pairs are an informative population in which to examine changes in educational attainment because each twin has the same parents and childhood socioeconomic status. We hypothesized that correlation in educational attainment of older twin pairs would be higher compared to younger twin pairs reflecting changes in educational access over time and potentially reflecting a "ceiling effect" associated with Jim Crow laws and discrimination. METHODOLOGY AND PRINCIPAL FINDINGS:We used data from 211 same-sex twin pairs (98 identical, 113 fraternal) in the Carolina African-American Twin Study of Aging who were identified through birth records. Participants completed an in-person interview. The twins were predominantly female (61%), with a mean age of 50 years (SD = 0.5). We found that older age groups had a stronger intra-twin correlation of attained educational level. Further analysis across strata revealed a trend across zygosity, with identical twins demonstrating more similar educational attainment levels than did their fraternal twin counterparts, suggesting a genetic influence. DISCUSSION:These findings suggest that as educational opportunities broadened in the 20th century, African-Americans gained access to educational opportunities that better matched their individual abilities