Isoconfigurational Elastic Constants and Liquid Fragility of a Bulk Metallic Glass Forming Alloy

Samples of Zr46.25Ti8.25Cu7.5Ni10Be27.5 were isothermally annealed and quenched near the glass transition temperature and studied by the pulse-echo overlap technique. The shear modulus G of the samples shows a strong reversible dependence on annealing temperatures and, thus, on the specific configurational potential energy of the equilibrium liquid. The low-T dependence of G of the configurationally frozen glasses shows linear temperature dependence as expected by Debye-Grüneisen theory. The T dependence of G in the liquid state is directly related to the viscosity and fragility of the liquid

Multiaxial analyzer detects low-energy electrons

Three curved plate energy analyzers coupled with three electron multiplier tubes detect and measure low energy electron flux in several directions simultaneously

The interstellar gas experiment

The Interstellar Gas Experiment (IGE) exposed thin metallic foils to collect neutral interstellar gas particles. These particles penetrate the solar system due to their motion relative to the sun. Thus, it is possible to entrap them in the collecting foils along with precipitating magnetospheric and perhaps some ambient atmospheric particles. For the entire duration of the Long Duration Exposure Facility (LDEF) mission, seven of these foils collected particles arriving from seven different directions as seen from the spacecraft. In the mass spectroscopic analysis of the noble gas component of these particles, we have detected the isotopes of He-3, He-4, Ne-20, and Ne-22. In the foil analyses carried out so far, we find a distribution of particle arrival directions which shows that a significant part of the trapped particles are indeed interstellar atoms. The analysis needed to subtract the competing fluxes of magnetospheric and atmospheric particles is still in progress

First Line Supervisor Training

Review of training opportunities for newly appointed leaders in the field of Public Safety Communications revealed a gap in current training opportunities for newly appointed 9-1-1 leaders. This Leadership Application Project addresses the need for new supervisors to gain both an educational understanding of the leadership skills necessary for success well as address some of the technical knowledge which is unique to public safety dispatching. The project is designed in short blocks which can be presented in a breakfast or lunch seminar type setting . Each topic is designed to introduce the new supervisor to a specific aspect of leadership. The goal is two fold: to present the basic information to develop strong leadership skills and to develop a support system for new supervisors. The project addresses the leadership topics: leadership styles, ethics/integrity, team building, mentoring, and performance management. The technical aspects of media relations, telematics, and voice over the internet protocol are also addressed due to their current critical impact on the 9-1-1 community. These topics were identified by current supervisors as key elements in the development of the next generation of public safety communication leaders. Upon completion of the training session, the new supervisors will have developed their own support system and the understanding of the elements necessary for successful leadership

The Interstellar Gas Experiment: Analysis in progress

The Interstellar Gas Experiment (IGE) exposed thin metallic foils aboard the LDEF spacecraft in low Earth orbit in order to collect neutral interstellar particles which penetrate the solar system due to their motion relative to the sun. By mechanical penetration these atoms were imbedded in the collecting foils along with precipitating magnetospheric ions and, possibly, with ambient atmospheric atoms. During the entire LDEF mission, seven of these foils collected particles arriving from seven different directions as seen from the spacecraft. After the foils were returned to Earth, a mass spectrometric analysis of the noble gas component of the trapped particles was begun. The isotopes of He-3, He-4, Ne-20, and Ne-22 were detected. We have given a first account of the experiment. In order to infer the isotopic ratios in the interstellar medium from the concentrations found in the foils, several lines of investigation had to be initiated. The flux of ambient atmospheric noble gas atoms moving toward the foils due to the orbital motion of LDEF was estimated by detailed calculations. Any of these particles which evaded the baffles in the IGE collector could be entrapped in the foils as a background flux. However, the calculations have shown that this flux is negligible, which was the intent of the experiment hardware design. This conclusion is supported by the measurements. However, both the concentration of trapped helium and its impact energy indicate that the flux of magnetospheric ions which was captured was larger than had been expected. In fact, it appears that the magnetospheric particles constitute the largest fraction of the particles in the foils. Since little is known about this particle flux, their presence in the IGE foils appears fortunate. The analysis of these particles provides information about their isotropic composition and average flux

Conversation Repair and Acquired Hearing Impairment: A Preliminary Quantitative Clinical Study

"Article Copyright 2004 The Authors." "Published edition Copyright 2004 Australian Academic Press. Published version of the paper reproduced here with permission from the publisher."This report provides a quantitative summary of the initial findings in a series of investigations into the validity and reliability of repair behaviour recorded in free conversation in clinical settings between adults who have acquired hearing impairments (HIs) and their frequent communication partners (FCPs). Seven adults who have severe or greater acquired HIs (and who had subsequently been either fitted with hearing aids or undergone cochlear implanta-tion) were audio-recorded undertaking a 20-minute free conversation in a quiet clinical setting with their chosen FCP. Transcriptions of the conversations were analysed for the occurrence of repair sequences following the Conversation Analysis (CA) model. A total of 735 completed repair sequences were identi-fied across the seven conversations, the majority occurring within the same turn as the trouble source. No difference was noted in the frequency with which all but one trajectory was initiated by either the HI or FCP participants. Repairs initiated by the HI participant and repaired by the FCP in response to a trouble source in a previous turn by the FCP occurred significantly more often than the same sequence initiated by the FCPs. The results empha-sise the usefulness of framing repair activity arising from acquired HI in the broader conversational act of repairing and the CA model

Moral reasoning and homosexuality: the acceptability of arguments about lesbian and gay issues

In the political arena, lesbian and gay issues have typically been contested on grounds of human rights, but with variable success. Using a moral developmental framework, the purpose of this study was to explore preferences for different types of moral arguments when thinking about moral dilemmas around lesbian and gay issues. The analysis presented here comprised data collected from 545 students at UK universities, who completed a questionnaire, part of which comprised a moral dilemma task. Findings of the study showed that respondents do not apply moral reasoning consistently, and do not (clearly) favour human rights reasoning when thinking about lesbian and gay issues. Respondents tended to favour reasoning supporting existing social structures and frameworks, therefore this study highlights the importance of structural change in effecting widespread attitude change in relation to lesbian and gay rights issues. The implications of the findings for moral education are also discussed.</p

Thermal and elastic properties of Cu–Zr–Be bulk metallic glass forming alloys

The compositional dependence of thermal and elastic properties of Cu–Zr–Be ternary bulk metallic glass forming alloys was systematically studied. There exists a linear relationship between the glass transition temperature Tg and the total Zr concentration. G decreases linearly with increasing Zr concentration as well. The results also show that Tg, shear modulus G, and Poisson's ratio nu are very sensitive to changes in compositions. Low Tg, low G, and relatively high nu can be achieved with high Zr and Ti concentration

Postcard from L. R. Lind to Hubert Creekmore (undated)

Postcard from L. R. Lind from Italy to Hubert Creekmore in Jackson, Mississippi regarding a possible visit by Hubert to Italy in the future, as well as Creekmore\u27s translation of Tibullus. The front of the postcard features a photograph of the Oratory of St Bernadine in Siena, Italy.https://egrove.olemiss.edu/creekmore/1902/thumbnail.jp