Flexible copper-indium-diselenide films and devices for space applications

With the ever increasing demands on space power systems, it is imperative that low cost, lightweight, reliable photovoltaics be developed. One avenue of pursuit for future space power applications is the use of low cost, lightweight flexible PV cells and arrays. Most work in this area assumes the use of flexible amorphous silicon (a-Si), despite its inherent instability and low efficiencies. However, polycrystalline thin film PV such as copper-indium-diselenide (CIS) are inherently more stable and exhibit better performance than a-Si. Furthermore, preliminary data indicate that CIS also offers exciting properties with respect to space applications. However, CIS has only heretofore only produced on rigid substrates. The implications of flexible CIS upon present and future space power platforms was explored. Results indicate that space qualified CIS can dramatically reduce the cost of PV, and in most cases, can be substituted for silicon (Si) based on end-of-life (EOL) estimations. Furthermore, where cost is a prime consideration, CIS can become cost effective than gallium arsenide (GaAs) in some applications. Second, investigations into thin film deposition on flexible substrates were made, and data from these tests indicate that fabrication of flexible CIS devices is feasible. Finally, data is also presented on preliminary TCO/CdS/CuInSe2/Mo devices

Attachment style and relationship difficulties in parents of children with ADHD

Previous studies report that parents of children with ADHD often experience difficulties in their couple relationship. The present study investigated the role of adult attachment style in relation to problems with dyadic adjustment and conflict communication. A cross-sectional design was employed, involving 98 parents of children and adolescents with ADHD and 153 parents of offspring without the disorder (age range in 3 to 19). Participants completed the following: Experiences in Close Relationships Questionnaire-R, Communications Pattern Questionnaire, Dyadic Adjustment Scale, and Conner's Parent Rating Scale–48. According to the findings, the two parental groups differed regarding relationship difficulties only when attachment style was controlled for. Moreover, attachment avoidance moderated the impact of having a child with ADHD on dyadic adjustment while attachment anxiety moderated such an impact on conflict communication. Also, parents of children with less severe ADHD symptoms were more likely to experience relationship problems, while having a child with ADHD moderated the effects of gender on the roles taken in demand-withdraw communication. Considering adult attachment style may provide useful insights into how parents of children with ADHD relate to each other and may inform supportive interventions.