Temperature, illumination and fluence dependence of current and voltage in electron irradiated solar cells

Emperical equations have been derived from measurements of solar cell photovoltaic characteristics relating light generated current, IL, and open circuit voltage, VO, to cell temperature, T, intensity of illumination, W, and 1 Mev electron fluence, phi both 2 ohm-cm and 10 ohm-cm cells were tested. The temperature dependency of IL is similar for both resistivities at 140mw/sq cm; at high temperature the coefficient varies with fluence as phi 0.18, while at low temperatures the coefficient is relatively independent of fluence. Fluence dependent degration causes a decrease in IL at a rate proportional to phi 0.153 for both resistivities. At all intensities other than 560 mw/sq cm, a linear dependence of IL on illumination was found. The temperature coefficient of voltage was, to a good approximation, independent of both temperature and illumination for both resistivities. Illumination dependence of VOC was logarithmic, while the decrease with fluence of VOC varied as phi 0.25 for both resistivities

Action of lithium in radiation hardened silicon solar cells Quarterly report, 23 Apr. - 15 Jul. 1968

Recovery properties of lithium containing p-n silicon solar cells after radiation damag

Action of lithium in radiation-hardened silicon solar cells Quarterly report, 16 Jul. - 15 Oct. 1968

Action of lithium in recovery of irradiated silicon solar cell

The role of entomology in environmental and science education: Comparing outreach methods for their impact on student and teacher content knowledge and motivation

Outreach programming can be an important way for local students and teachers to be exposed to new fields while enhancing classroom learning. University-based outreach programs are offered throughout the country, including most entomology departments as few individuals learn about insects in school and these programs can be excellent sources of entomological education, as well as models to teach environmental and science education. Each department utilizes different instructional delivery methods for teaching about insects, which may impact the way in which students and teachers understand the insect concepts presented. To determine the impact of using entomology to enhance science and environmental education, this study used a series of university-based entomology outreach programs to compare three of the most common delivery methods for their effect on teacher and student content knowledge and motivation, specifically student interest in entomology and teacher self-efficacy. Twenty fifth grade classrooms were assessed over the course of one school year. The results show that teacher knowledge significantly increased when teachers were unfamiliar with the content and when trained by an expert, and teacher self-efficacy did not decrease when asked about teaching with insects. For students, content knowledge increased for each lesson regardless of treatment, suggesting that outreach program providers should focus on working with local schools to integrate their field into the classroom through the delivery methods best suited to the needs of the university, teachers, and students. The lessons also had an impact on student interest in science and environmental education, with an overall finding that student interest increases when using insects in the classroom

Study to determine and improve design for lithium-doped solar cells Quarterly report, 1 Apr. - 30 Jun. 1970

Lithium action effects on spontaneous annealing of radiation damage in bulk silicon and silicon solar cell

The Unheard Stories of Service-Learners: An Exploratory Study of the Assumptions of Race, Identity, and Privilege within the Service-Learning Experience

Service-learning has become a powerful pedagogical practice in Higher Education. Yet many of its practices have been premised on the idea that participants are white and serving a community unlike their own. Research suggests that the perspectives and identities of students of a diverse background participating in service-learning experiences may be unheard and/or misunderstood. Through a qualitative exploratory study, this study examined the perspective of nonwhite students. Four students from two higher education institutions selected to participate in a set of longitudinal, semi-structured, in-depth interviews in order to better understand their perspectives and experiences in their service-learning field site. Service-learning experiences are currently reinforcing the negative assumptions of the practice, but through this study, the stories and voices heard will hopefully change the assumptions and stereotypes to be more positive and accepting of all participating. Upon conclusion of this research study, it has been determined that more work needs to be done to prepare and educate the field of higher education and the effects of service-learning for diverse students. Recommendations for moving beyond this study would be to open the participant pool, expand the amount of higher education institutions that have students be interviewed, and begin creating orientation workshops to educate what it’s like for a student to serve a community like their own

Evaluating the Efficacy of an Attachment-Informed Psychotherapeutic Parenting Program for Incarcerated Parents

An attachment-based, psychotherapeutic parent education course was created for incarcerated mothers and fathers to improve their ability to provide positive parenting and a more stable home environment for their children. The current study assessed the effects of this parenting curriculum on parents’ tendencies to be abusive, their sense of efficacy and satisfaction as a parent, their psychological distress, and their knowledge of child development and positive child guidance strategies. Results of pre-post assessments showed a significant improvement in parents’ sense of efficacy and satisfaction in the parenting role; their knowledge, skills, and behavior as a parent; their understanding of child development; their knowledge of alternatives to using corporal punishment; establishing appropriate parent-child boundaries; and they were less likely to view their child’s independence as a threat. Females showed a significant decrease in distress symptoms. Results are discussed in terms of the critical need for effective, high-quality parent education to break the intergenerational cycle of poor parenting for this at-risk population

Radiation damage in lithium-containing solar cells Final report, 21 Jun. 1966 - 20 Mar. 1968

Interaction of lithium with defects induced in silicon solar cells by one MeV electron bombardmen