Striking characteristics of the magnetron ionization gage in helium from 1.9 times 10 to the minus 7 torr to 7 times 10 to the minus 10 torr

Striking characteristics of magnetron ionization gages in helium over low pressure rang

In situ mass analysis of particles by surface ionization mass spectrometry

A qualitative study of the application of surface ionization and mass spectrometry to the in situ detection and constituent analysis of atmospheric particles was conducted. The technique consists of mass analysis of ions formed as a result of impingement of a stream of particles on a hot filament where, it is presumed, surface ionization takes place. Laboratory air particles containing K, Ca, and possibly hydrocarbons were detected. Other known particles such as Al2O3, Pb(NO3)2, and Cr2O3 were analyzed by detecting the respective metal atoms making up the particles. In some cases, mass numbers indicative of compounds making up the particles were detected showing surface ionization of particles sometimes leads to chemical analysis as well as to elemental analysis. Individual particles were detected, and it was shown that the technique is sensitive to Al2O3 particles with a mass of a few nanograms

A Survey of Student Coaches\u27 Knowledge, Attitudes, Skills, and Behaviors Regarding the Female Athlete Triad

The female athlete triad (disordered eating, amenorrhea, osteoporosis) is a severe and potentially fatal syndrome that affects many female athletes. This research described the preparedness of coaches to participate in primary prevention and intervention of the triad; specifically, senior Physical Education and Sport majors\u27 (N=61) current state of knowledge, attitudes, skills, and behaviors related to the triad were examined. Results indicated that the majority of student coaches lacked knowledge of the triad, appropriate attitudes and skills, and were not likely to participate in indicated behaviors. Comparisons found that female students had significantly more knowledge, appropriate attitudes and skills, and were more likely to participate in indicated behaviors than male students. Also, subjects who reported receiving training about the triad did not significantly differ in their knowledge, attitudes, and behaviors from those without training. These findings indicate the need for initial and continuing education of coaches

Geochemistry of Kauai shield-stage lavas: Implications for the chemical evolution of the Hawaiian plume

We measured He, Sr, Nd, Pb, and Os isotope ratios and major and trace element concentrations in stratigraphically and paleomagnetically controlled shield-stage lavas from Kauai, Hawaii. The range of 3He/4He ratios (17–28 RA) from Kauai is similar to that reported from Loihi and thus challenges the prevailing notion that high 3He/4He ratios are restricted to the preshield stage of Hawaiian magmatism. 3He/4He ratios vary erratically with stratigraphic position, and chronostratigraphic control from paleomagnetic data indicates very rapid changes in the 3He/4He ratios (up to 8 RA in ~102 years). These variations in helium isotopic ratios are correlated with variations in radiogenic isotope ratios, suggesting rapid changes in melt composition supplying the magma reservoir. A three-component mixing model, previously proposed for Hawaiian shield lavas, does not adequately explain the isotopic data in Kauai shield lavas. The addition of a depleted-mantle (DM) component with the isotopic characteristics similar to posterosional basalts explains the isotopic variability in Kauai shield lavas. The DM component is most apparent in lavas from the Kauai shield and is present in varying proportion in other Hawaiian shield volcanoes. Shield lavas from Kauai sample a high 3He/4He end-member (Loihi component), but while lavas from western Kauai have a larger contribution from the Kea component (high 206Pb/204Pb, anomalously low 207Pb/204Pb relative to 206Pb/204Pb), lavas from eastern Kauai have a larger proportion of an enriched (Koolau) component. The systematic isotopic differences between eastern and western Kauai reflect a gradual migration of the locus of volcanism from west to east, or alternatively east and west Kauai are two distinct shield volcanoes. In the latter case, the two shield volcanoes have maintained distinct magma supply sources and plumbing systems. Our new geochemical data from Kauai are consistent with the existence of a single high 3He/4He reservoir in the Hawaiian plume and suggest that the proportion of the different mantle components in the plume have changed significantly in the past 5 Myr. The long-term evolution of the Hawaiian plume and the temporal variability recorded in Kauai lavas require more complex geochemical heterogeneities than suggested by radially zoned plume models. These complexities may arise from heterogeneities in the thermal boundary layer and through variable entrainment of ambient mantle by the upwelling plume

Perceived Effectiveness of Study Skills Training for Division III College Athletes: A Pilot Program

College athletes experience high levels of stress and academics is one of the primary causes. This study was designed to evaluate the effectiveness of a study skills training workshop designed around the theory of Multiple Intelligences. The pilot-workshop was developed with minimal resources, tailored to college athletes, and focused on helping them adopt personally meaningful active study strategies. An inductive, naturalistic evaluation approach was used to analyze the qualitative responses of 55 athletes who participated in the workshop. Findings showed that those who adopted active study strategies experienced benefits in the areas of decreased stress, perceived effectiveness, perceived efficiency, greater variety of options for how to study, and academic benefits. While benefits to active studying far outnumbered barriers, participants did identify some challenges including time, lack of applicability to all classes, and the challenge of learning something new. The results of this study provide support for utilizing individualized study skills training that empowers students to capitalize on their personal learning strengths. Such programs can be built into the academic support structures delivered by academic advisors and learning specialists, with potential benefits in the areas of both mental health and skill development to support academic success

Calculated and measured stresses in simple panels subject to intense random acoustic loading including the near noise field of a turbojet engine

Flat 2024-t3 aluminum panels measuring 11 inches by 13 inches were tested in the near noise fields of a 4-inch air jet and turbojet engine. The stresses which were developed in the panels are compared with those calculated by generalized harmonic analysis. The calculated and measured stresses were found to be in good agreement. In order to make the stress calculations, supplementary data relating to the transfer characteristics, damping, and static response of flat and curved panels under periodic loading are necessary and were determined experimentally. In addition, an appendix containing detailed data on the near pressure field of the turbojet engine is included

Hearts on Our Sleeves: Emotions Experienced by Service-Learning Faculty

Compared to more traditional pedagogical approaches, service-learning has been shown to offer unique experiences for students and faculty. With the growth of service-learning within higher education, it has become increasingly important to understand service-learning faculty, namely faculty emotions, which can impact students in many ways. Utilizing ecological momentary assessment (EMA) and focus groups, the study discussed in this article assessed the emotions of 17 service-learning faculty with varying levels of experience over the course of one semester. Results revealed that service-learning faculty experience a number of emotional highs and lows related to class logistics, community partners, and student engagement. Additionally, more experienced service-learning faculty handled their emotions differently than newer faculty. The authors also highlight implications and opportunities for service-learning faculty and administrators, based on the study results