Lap Shear Testing of Candidate Radiator Panel Adhesives

During testing of a subscale radiator section used to develop manufacturing techniques for a full-scale radiator panel, the adhesive bonds between the titanium heat pipes and the aluminum face sheets failed during installation and operation. Analysis revealed that the thermal expansion mismatch between the two metals resulted in relatively large shear stresses being developed even when operating the radiator at moderate temperatures. Lap shear testing of the adhesive used in the original joints demonstrated that the two-part epoxy adhesive fell far short of the strength required. A literature review resulted in several candidate adhesives being selected for lap shear joint testing at room temperature and 398 K, the nominal radiator operating temperature. The results showed that two-part epoxies cured at room and elevated temperatures generally did not perform well. Epoxy film adhesives cured at elevated temperatures, on the other hand, did very well with most being sufficiently strong to cause yielding in the titanium sheet used for the joints. The use of an epoxy primer generally improved the strength of the joint. Based upon these results, a new adhesive was selected for the second subscale radiator section

Draw me a picture, tell me a story: Evoking memory and supporting analysis through pre-interview drawing activities

In interviews for interpretive inquiry or interpretive case studies, researchers hope to grasp participants’ perspectives and learn about the nature and meaning of their experiences. There are many challenges or requirements for useful or successful interviews. In this paper we identify important aspects of interviews and examine the helpful contributions of using pre-interview activities. Pre-interview activities were drawings or diagrams that participants completed about the experiences of interest. Participants brought the completed drawings to their interviews and the interviews commenced with presentation and discussion of these visuals. This paper presents four studies that illustrate how the use of pre-interview activities can support participants in identifying central ideas in their experiences. In the interviews, the participants spoke at length about the visual representations they produced and in these reflections they identified central ideas or key themes in the experiences. Some drawings were a source of visual metaphors for discussing the experience and some highlighted whole-part relationships that informed interpretation. The findings contribute to conversations about how to “invite stories” rather than “request reports” from participants, how images other than photographs can serve as evocative and potent visuals to support memory and reflection in interviews, and how researchers can better or more directly access a participant’s meaning.Lors d’entrevues dans le contexte d’enquêtes interprétatives ou d’études de cas interprétatives, les chercheurs espèrent comprendre les perspectives des participants et de se renseigner sur la nature et le sens de leurs expériences. Les entrevues utiles ou réussies impliquent de nombreux défis et plusieurs exigences. Dans cet article, nous identifions certains aspects importants d’entrevues et examinons les contributions utiles des activités pré-entrevues. Les activités pré-entrevues consistaient en des dessins ou des diagrammes complétés par les participants et portant sur des expériences qui les intéressaient. Les participants sont arrivés aux entrevues avec leurs dessins terminés; les entrevues ont débuté par une présentation et une discussion de ces illustrations. Cet article présente quatre études qui illustrent la mesure dans laquelle l’emploi d’activités pré-entrevues peut appuyer les participants dans l’identification des idées qui sont centrales à leurs expériences. Lors des entrevues, les participants ont longuement parlé au sujet des représentations visuelles qu’ils avaient produites; au cours de leurs réflexions, ils ont identifié les idées centrales, ou thèmes clés, de ces expériences. Certains dessins étaient sources de métaphores visuelles servant d’appui à l’expérience; d’autres mettaient l’accent sur les relations partie-tout qui éclairaient leurs interprétations. Les résultats viennent contribuer aux conversations sur la façon d‘inviter les participants à « raconter des histoires » plutôt que de leur « demander des rapports », sur le rôle que peuvent jouer les images (autres que les photos) comme illustrations évocatrices et puissantes qui appuient la mémoire et la réflexion lors d’entrevues, et sur les moyens pour les chercheurs d’avoir un meilleur accès, ou un accès plus directe, au sens que veulent communiquer les participants

Koinonia

Ways to Grow Our ProfessionVocational Education: A New Perspective, Brent Ellis Forging Ahead in Student Programs, Steve Austin Ways to Train OthersThe Steps to Thinking Well are as Easy as 1-2-3, Randy Blackford Ten Things Every RA Should Know, Brad Voyles Ways We Have LearnedI Learned Too, Sara Oyer One Year Later, Rob Loane Regular FeaturesPresident\u27s Corner Editor\u27s Disk ACSD Accoladeshttps://pillars.taylor.edu/acsd_koinonia/1015/thumbnail.jp

It's about time: Investing in transportation to keep Texas economically competitive - Appendices

APPENDIX A : PAVEMENT QUALITY (Zhanmin Zhang, Michael R. Murphy, Robert Harrison), 7 pages -- APPENDIX B : BRIDGE QUALITY (Jose Weissmann, Angela J. Weissmann), 6 pages -- APPENDIX C : URBAN TRAFFIC CONGESTION (Tim Lomax, David Schrank), 32 pages -- APPENDIX D: RURAL CORRIDORS (Tim Lomax, David Schrank), 6 pages -- APPENDIX E: ADDITIONAL REVENUE SOURCE OPTIONS FOR PAVEMENT AND BRIDGE MAINTENANCE (Mike Murphy, Seokho Chi, Randy Machemehl, Khali Persad, Robert Harrison, Zhanmin Zhang), 81 pages -- APPENDIX F: FUNDING TRANSPORTATION IMPROVEMENTS (David Ellis, Brianne Glover, Nick Norboge, Wally Crittenden), 19 pages -- APPENDIX G: ESTIMATING VEHICLE OPERATING COSTS AND PAVEMENT DETERIORATION (by Robert Harrison), 4 page

Sharp-Tailed Grouse Nest Survival and Nest Predator Habitat Use in North Dakota’s Bakken Oil Field

Recent advancements in extraction technologies have resulted in rapid increases of gas and oil development across the United States and specifically in western North Dakota. This expansion of energy development has unknown influences on local wildlife populations and the ecological interactions within and among species. Our objectives for this study were to evaluate nest success and nest predator dynamics of sharp-tailed grouse (Tympanuchus phasianellus) in two study sites that represented areas of high and low energy development intensities in North Dakota. During the summers of 2012 and 2013, we monitored 163 grouse nests using radio telemetry. Of these, 90 nests also were monitored using miniature cameras to accurately determine nest fates and identify nest predators. We simultaneously conducted predator surveys using camera scent stations and occupancy modeling to estimate nest predator occurrence at each site. American badgers (Taxidea taxus) and striped skunks (Mephitis mephitis) were the primary nest predators, accounting for 56.7% of all video recorded nest depredations. Nests in our high intensity gas and oil area were 1.95 times more likely to succeed compared to our minimal intensity area. Camera monitored nests were 2.03 times more likely to succeed than non-camera monitored nests. Occupancy of mammalian nest predators was 6.9 times more likely in our study area of minimal gas and oil intensity compared to the high intensity area. Although only a correlative study, our results suggest energy development may alter the predator community, thereby increasing nest success for sharp-tailed grouse in areas of intense development, while adjacent areas may have increased predator occurrence and reduced nest success. Our study illustrates the potential influences of energy development on the nest predator—prey dynamics of sharp-tailed grouse in western North Dakota and the complexity of evaluating such impacts on wildlife

Spectral Dark Subtraction: A MODTRAN-Based Algorithm for Estimating Ground Reflectance without Atmospheric Information

Spectral Dark Subtraction (SDS) provides good ground reflectance estimates across a variety of atmospheric conditions with no knowledge of those conditions. The algorithm may be sensitive to errors from stray light, calibration, and excessive haze/water vapor. SDS seems to provide better estimates than traditional algorithms using on-site atmospheric measurements much of the time

Anatomy of a post-starburst minor merger: a multi-wavelength WFC3 study of NGC 4150

(Abridged) We present a spatially-resolved near-UV/optical study of NGC 4150, using the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope. Previous studies of this early-type galaxy (ETG) indicate that it has a large reservoir of molecular gas, exhibits a kinematically decoupled core (likely indication of recent merging) and strong, central H_B absorption (indicative of young stars). The core of NGC 4150 shows ubiquitous near-UV emission and remarkable dusty substructure. Our analysis shows this galaxy to lie in the near-UV green valley, and its pixel-by-pixel photometry exhibits a narrow range of near-UV/optical colours that are similar to those of nearby E+A (post-starburst) galaxies. We parametrise the properties of the recent star formation (age, mass fraction, metallicity and internal dust content) in the NGC 4150 pixels by comparing the observed near-UV/optical photometry to stellar models. The typical age of the recent star formation (RSF) is around 0.9 Gyrs, consistent with the similarity of the near-UV colours to post-starburst systems, while the morphological structure of the young component supports the proposed merger scenario. The RSF metallicity, representative of the metallicity of the gas fuelling star formation, is around 0.3 - 0.5 Zsun. Assuming that this galaxy is a merger and that the gas is sourced mainly from the infalling companion, these metallicities plausibly indicate the gas-phase metallicity (GPM) of the accreted satellite. Comparison to the local mass-GPM relation suggests (crudely) that the mass of the accreted system is around 3x10^8 Msun, making NGC 4150 a 1:20 minor merger. A summation of the pixel RSF mass fractions indicates that the RSF contributes about 2-3 percent of the stellar mass. This work reaffirms our hypothesis that minor mergers play a significant role in the evolution of ETGs at late epochs.Comment: 28 pages, 2 tables, accepted for publication in Ap

2000 Ohio-Grape Wine Short Course

Air, water, sun, and fire--the cooper's footprint on the barrel / Henry Work -- Keeping the bugs unhappy; successful barrel sanitation and maintenance / Henry Work -- Recommended methods for cleaning and maintaining oak cooperage / Phil Burton and Henry Work, with Jim Yerkes -- Chip me, stave me, oak me! The romance, dollars and sense of barrel alternatives / Tim DiPlacido -- Oak experiments / Roland Riesen -- Barrel experiment / Nick Ferrante -- Exploring the versatility and potential of vidal / Roland Riesen -- Ferrante: 1999 vineyard planting / Nick Ferrante -- Breeding rootstocks for current and impending viticultural problems / Andrew Walker -- Grape expectations looking toward traditional and non-traditional sponsors to enhance your event / Doniella Winchell -- Assessing grape maturity by taste and by numbers / Thomas Henick-Kling -- Influence of fruit condition on wine quality / James F. Gallander -- Influence of post bottling storage temperature and SO2 on wine quality / T. E. Steiner -- What we do at harvest to help wine quality / Tony Debevc -- Delivering wine quality / Nick Ferrante -- Criteria for selecting rootstocks / Andrew Walker -- A comparison of Pinot noir production in New York and Burgundy / Pascal Durand and Leslie Weston -- A unique approach to harvest labor / Fran Massaro -- New fungicide registrations for grapes in the year 2000 / Michael Ellis -- Studies to determine time of susceptibility of grape berry and rachis tissues to infection by Phomopsis viticola / O. Erincik, L. V. Madden, D. C. Ferree and M. A. Ellis -- Rootstock performance in Ohio / Arnie Esterer -- Growing your own: vinifera grafting experiments (1999) / Ron Barrett -- Developing an effective fungicide spray program for wine grapes in Ohio / Michael Ellis -- Light and fruit set / David C. Ferree, David M. Scurlock and John C. Schmid -- Soil amendments and mulches in tree health management / Harry Hoitink, Matthew Krause and Randy Zondag -- Report of 5th International Symposium on Cool Climate Viticulture and Enology / Roland Riesen -- Control strategies for soil insects in the vineyard / Roger Williams and Dan Fickl

Insurance-induced moral hazard: A dynamic model of within-year medical care decision making under uncertainty

Abstract Insurance-induced moral hazard may lead individuals to overconsume medical care. Many studies estimate this overconsumption using models that aggregate medical care decisions up to the annual level. Using employer-employee matched data from the Medical Expenditure Panel Survey (MEPS), I estimate the effect of moral hazard on medical care expenditure using a dynamic model of within-year medical care consumption that allows for endogenous health transitions, variation in medical care prices, and individual uncertainty within a health insurance year. I then calculate moral hazard effects under a second set of conditions that are consistent with the assumptions of most annual decision-making models. The within-year decision-making model produces a moral hazard effect that is 24% larger than the alternative model. I also provide evidence of heterogeneous moral hazard effects, particularly between insured and uninsured individuals, and discuss related policy implications. The paper concludes with a counterfactual policy simulation that implements the individual mandate provision of the 2010 Patient Protection and Affordable Care Act. I find that full implementation of the individual mandate decreases the percentage of uninsured individuals in the population being analyzed from 11.8% to 6.0% and increases average medical care expenditure 77% among the newly insured. JEL Classification: C61, D81, G22, I12, I1