Construction and Calibration of a Streaked Optical Spectrometer for Shock Temperature

Here we describe the implementation and calibration of a streaked visible spectrometer (SVS) for optical pyrometry and emission/absorption spectroscopy on light gas gun platforms in the UC Davis Shock Compression Laboratory. The diagnostic consists of an optical streak camera coupled to a spectrometer to provide temporally and spectrally-resolved records of visible emission from dynamically-compressed materials. Fiber optic coupling to the sample enables a small diagnostic footprint on the target face and flexibility of operation on multiple launch systems without the need for open optics. We present the details of calibration (time, wavelength and spectral radiance) for absolute temperature determination and present benchmark measurements of system performance.Comment: 6 pages, 3 figures Davies, E., et al. (accepted). In J. Lane, T. Germann, and M. Armstrong (Eds.), 21st Biennial APS Conference on Shock Compression of Condensed Matter (SCCM19). AIP Publishin

A Tribute to Mordecai Johnson

The following remarks were made by Dr. Asa T. Spaulding, Chairman of the Board of Trustees, on September 6, 1973, on the occasion of the naming of the University\u27s Administration Building in honor of Dr. Mordecai Wyatt Johnson, President Emeritus of Howard University

Pilot Data: Are Vertical and Lateral Hop Tests Appropriate for Patients Post-Ankle Fracture?

Ankle fractures effect 5 out of 10,000 individuals (van Staa, 2001). A recent study shows rapid functional gains over the first 6 months after an ankle fracture, but there are little or no gains 18-24 months into the recovery cycle (Beckenkamp, 2014). Similarly, other studies have shown that ankle fracture patients are categorized as having good recovery outcomes on popular measures such as the modified Olerud Molander scale (Egol, 2006), yet are unable to return to previous level of sport (Hong, 2013), indicating there may be persisting higher level performance deficits. This brings up the issue of whether there are performance based tests that would be appropriate for ankle fracture patients to determine return to sport or higher level activity without risk of injury. The purpose of this project is to determine the biomechanical load and side to side comparisons of vertical and lateral hopping tests that may be used in ankle fracture patients

A Captive Beauty : Polka - Romanza

https://digitalcommons.library.umaine.edu/mmb-ps/1434/thumbnail.jp

Children with ADD/ADHD: Survey results provide insights into effective optometric vision management of this special population

Optometric management of ADDI/DHD children is being done in both the primary vision care practice as well as the vision therapy and pediatric care practice. This is a special population which may pose unique examination or treatment challenges to the general practitioner. The role of the optometrist in the vision care of ADD/ADHD children is explored through an e-mail survey sent via the internet. The survey emphasized the elicitation of clinical pearls from optometrists currently working with this special population regarding their views and experiences on successful examination and management of the ADD/ADHD patient. Certain challenges presented by the process of medical diagnoses and pharmacological treatment of ADD/ADHD is explored. The goal is to enlighten the general practitioner about some of the issues surrounding this often misunderstood condition and provide a collection of clinical advice and optometric viewpoints which will assist the general practitioner in his or her optometric care of this population

Thinking About the Future Cognitive Remediation Therapy—What Works and Could We Do Better?

This article reviews progress in the development of effective cognitive remediation therapy (CRT) and its translational process. There is now enough evidence that cognitive difficulties experienced by people with schizophrenia can change and that the agenda for the next generation of studies is to increase these effects systematically through cognitive remediation. We examine the necessary steps and challenges of moving CRT to treatment dissemination. Theories which have been designed to explain the effects of cognitive remediation, are important but we conclude that they are not essential for dissemination which could progress in an empirical fashion. One apparent barrier is that cognitive remediation therapies look different on the surface. However, they still tend to use many of the same training procedures. The only important marker for outcome identified in the current studies seems to be the training emphasis. Some therapies concentrate on massed practice of cognitive functions, whereas others also use direct training of strategies. These may produce differing effects as noted in the most recent meta-analyses. We recommend attention to several critical issues in the next generation of empirical studies. These include developing more complex models of the therapy effects that take into account participant characteristics, specific and broad cognitive outcomes, the study design, as well as the specific and nonspecific effects of treatment, which have rarely been investigated in this empirical programme

Factors that Influence Teachers’ Views on Standardized Tests

The central aim of this study was to explore K-12 teachers’ (N = 183) attitudes about standardized tests as a function of experience, instructional level, student population, and type of school. The Teachers’ Views on Standardized Tests Questionnaire was developed to assess teachers’ perceptions of the impact of standardized tests on practice. All survey items were intended to measure a facet of teachers’ attitudes regarding the necessity of standardized tests and their influence on best practices. Findings from this study indicated that special education and inclusion teachers viewed standardized tests as more negatively influencing instruction than general education teachers. There were also significant differences by instructional level and type of school (i.e., public vs. independent). Compared to elementary teachers, middle and high school teachers’ views were more negative, and public school educators perceived standardized assessments as having a more negative influence on instruction than teachers in independent schools. Finally, elementary school teachers reported that the standards of learning were more appropriate in contrast to middle and high school teachers

Dust Mediated Transfer of Phosphorus to Alpine Lake Ecosystems of the Wind River Range, Wyoming, USA

Alpine lakes receive a large fraction of their nutrients from atmospheric sources and are consequently sensitive to variations in both the amount and chemistry of atmospheric deposition. In this study we explored the spatial changes in lake water chemistry and biology along a gradient of dust deposition in the Wind River Range, Wyoming. Regional differences were explored using the variation in bulk deposition, lake water, sediment, and bedrock geochemistry and catchment characteristics. Dust deposition rates in the Southwestern region averaged 3.34 g m−2 year−1, approximately three times higher than deposition rates in the Northwestern region (average 1.06 g m−2 year−1). Dust-P deposition rates ranged from 87 µg P m2 day−1 in the Northwestern region to 276 µg P m2 day−1 in the Southwestern region. Subalpine and alpine lakes in the Southwestern region had greater total phosphorus (TP) concentrations (5–13 µg L−1) and greater sediment phosphorus (SP) concentrations (2–5 mg g−1) than similar lakes elsewhere in the region (1–8 µg L−1 TP, 0.5–2 mg g−1 SP). Lake phosphorus concentrations were related to dissolved organic carbon (DOC) across vegetation gradients, but related to the percent of bare rock, catchment area to lake area, and catchment steepness across dust deposition gradients. Modern phytoplankton and zooplankton biomasses were two orders of magnitude greater in the Southwest than in the Northwest, and alpine lakes in the Southwest had a unique diatom species assemblage with relatively higher concentrations of Asterionella formosa, Pseudostaurosira pseudoconstruens, and Pseudostaurosira brevistriata. These results suggests that catchment controls on P export to lakes (i.e. DOC) are overridden in dominantly bare rock basins where poor soils cannot effectively retain dust deposited P

Deconstructing Stereotypes: Stature, Match-playing Time, and Performance in Elite Women\u27s World Cup Soccer

Recruiting companies recommend elite female soccer players be ≥165 cm (5\u275″) in stature. This study investigated if stature limits match-playing time and performance in elite World Cup soccer among players, positions, and countries. We hypothesized stature would not affect match-playing time or performance. Descriptive data were collected on 552 players from 2019 FIFA Women\u27s World Cup. Odds ratios determined likelihood of starting for players ≥165 cm. ANOVAs compared playing time between stature groups, among positions, and between countries. Performance factors including assists, goals, attempts, corners, shots blocked, and defending blocks were reported. Independent t-tests compared differences between players (≥165 cm, \u3c 165 cm). Data are reported, mean difference [95% confidence interval] [MD (95%CI)] and effect sizes (ES). On average, 32.3% of players were F = 0.98, p = 0.32), matches (F = 0.27 p = 0.59), or average minutes per match (F = 0.48, p = 0.49) between stature groups, regardless of position. No differences existed in playing time between players ≥165 cm among any positions (p \u3e 0.05), or between countries (p \u3e 0.05). Taller mid-fielders exhibited greater performance in goals, assists, attempts, shots blocked, and defending blocks (MD [95%CI] ES; assists, -0.44[-0.76,-0.11]0.59, p = 0.009; goals, -0.35[-0.69,-0.01]0.44, p = 0.047); attempts, 3.14[1.38, 4.90]0.80, p = 0.001; corners, 2.04[0.12, 3.95]0.48, p = 0.037; shots blocked, 0.96[0.40, 1.51]0.75, p = 0.001; defending blocks, 0.43[0.32,0.82]0.48, p = 0.035), however, actual differences were minimal. Our findings indicate stature does not inhibit playing and performing elite women\u27s soccer, as nearly one-third of players were \u3c165 \u3ecm