An exploratory investigation of the effect of a plastic coating on the profile drag of a practical-metal-construction sailplane airfoil

The Langley low-turbulence pressure tunnel to determine the effect of a plastic coating on the profile drag of a practical-metal-construction sailplane airfoil was investigated. The model was tested with three surface configurations: (1) filled, painted, and sanded smooth; (2) rough bare metal; and (3) plastic-coated. The results are compared with data for the design airfoil (Wortmann FX 67-K-170/17) from another low-turbulence wind tunnel. The investigation was conducted at Reynolds numbers based on airfoil chord of 1.1 x 10 to the 6th power, 2.2 x 10 to the 6th power, and 3.3 x 10 to the 6th power at a Mach number of 0.10

The phosphorylation state of Saccharomyces cerevisiae linker histone Hho 1p during entry and exit of stationary phase

Includes bibliographical references.Our group has recently found that the linker histone Hh01 p of Saccharomyces cerevisiae exhibited a significant increase in binding to chromatin during stationary phase. Because of the role of H1 in gene expression and chromatin compaction, it is essential to understand the mechanism behind this change in binding behaviour for a complete mechanistic description of gene regulation. We postulated that the phosphorylation of serine or threonine residues decrease the affinity of H1 for DNA, resulting in the dissociation of H1 from chromatin in exponential phase. We investigated this possible change in the phosphorylation state of Hh01 p in yeast cells in exponential phase and in stationary phase by immunoprecipitation of Hh01 p, followed by western analysis using antiphosphoserine and anti-phosphothreonine antibodies

Low-speed aerodynamic characteristics of a 13-percent-thick airfoil section designed for general aviation applications

Wind-tunnel tests were conducted to determine the low-speed section characteristics of a 13 percent-thick airfoil designed for general aviation applications. The results were compared with NACA 12 percent-thick sections and with the 17 percent-thick NASA airfoil. The tests were conducted ovar a Mach number range from 0.10 to 0.35. Chord Reynolds numbers varied from about 2,000,000 to 9,000,000

Evaluation of solid oxide fuel cell systems for electricity generation

Air blown (low BTU) gasification with atmospheric pressure Solid Electrolyte Fuel Cells (SOFC) and Rankine bottoming cycle, oxygen blown (medium BTU) gasification with atmospheric pressure SOFC and Rankine bottoming cycle, air blown gasification with pressurized SOFC and combined Brayton/Rankine bottoming cycle, oxygen blown gasification with pressurized SOFC and combined Brayton/Rankine bottoming cycle were evaluated

Risk Reducing Behaviors in a Community Sample of Women with a Family History of Breast Cancer

This study was designed to examine and explain the use of risk-reducing behaviors in a group of women recruited from the community who had a family history of breast cancer. An empirically derived model was developed that included variables hypothesized to influence adherence intentions, early detection behaviors, and high-risk clinic contact intentions. The model included the background variables of age, objective risk, education, income, and healthcare communication and the proximal variables of perceived risk, cancer specific distress, and attitude. This study also prospectively examined the use of high-risk services. Participants included women (N = 187) with a family history of breast cancer who had no prior contact with a high-risk or familial breast cancer clinic or program. Study hypotheses were tested with correlational analyses, structural equation modeling (SEM), and logistic regression. Results of SEM found that the proposed variables accounted for 42% of the variance in adherence intentions, and 23% of the variance in both early detection behaviors and clinic contact intentions. Approximately 24% of the women who participated in this study contacted the high-risk clinic to receive additional information about their risk. Predictors of clinic contact included higher objective risk, higher clinic contact intentions, lower perceived risk, and higher cancer distress. Implications of these findings are discussed

The contribution of negative social responses to self-blame among survivors of sexual violence : a psychodynamic and sociocultural perspective

Survivors of sexual violence often blame themselves for harms committed against them, echoing the negative responses they receive from others upon disclosure. While it appears that the hostile social climate surrounding sexual violence disclosure contributes to self-blame, the mechanism by which negative responses exert this pernicious influence has not been sufficiently articulated in prior research. Responding to this deficit, this theoretical investigation addresses three questions: 1) What is the psychic mechanism by which negative social responses engender self-blame among survivors of sexual violence? 2) What social factors explain why this mechanism is activated around sexual violence disclosure? 3) What are the implications for social work practice? To address these questions, this study synthesizes key concepts from Kleinian developmental theory and post-structural feminist theory to examine the contribution of negative social responses to self-blame among survivors of sexual violence, with specific attention to the psychic and social factors underlying negative social responses and self-blame. Implications for clinical work with individual survivors of sexual violence and broader prevention efforts are explore

The role of signal transducer and activator of transcription-3 (STAT-3) in ischaemic and pharmacological postconditioning

Includes abstract. Includes bibliographical references (leaves 131-147)

The Enhanced Reading Opportunities Study: Findings from the Second Year of Implementation

According to the National Assessment of Educational Progress, a majority of ninth-graders in low-performing high schools begin their freshman year with significant reading difficulties. Poor reading ability is a key predictor of academic disengagement and, ultimately, dropping out. This report presents findings from the second year of the Enhanced Reading Opportunities (ERO) study, a demonstration and random assignment evaluation of two supplemental literacy programs -- Reading Apprenticeship Academic Literacy and Xtreme Reading -- that aim to improve the reading comprehension skills and school performance of struggling ninth-grade readers