Formulation of a telemetry computer program Final report

Algorithm and computer program for telemetry programme

Assessment of mechanical properties and microstructure characterizing techniques in their ability to quantify amount of cold work in 316l alloy

Stress corrosion cracking (SCC) behavior is a matter of concern for structural materials, namely, stainless steels and nickel alloys, in nuclear power plants. High levels of cold work (CW) have shown to both reduce crack initiation times and increase crack growth rates. Cold working has numerous effects on a material, including changes in microstructure, mechanical properties, and residual stress state, yet it is typically reported as a simple percent change in geometry. There is need to develop a strategy for quantitative assessment of cold-work level in order to better understand stress corrosion cracking test data. Five assessment techniques, commonly performed alongside stress corrosion cracking testing (optical microscopy (OM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD), tensile testing, and hardness testing) are evaluated with respect to their ability to quantify the level of CW in a component. The test material is stainless steel 316L that has been cold-rolled to three conditions: 0%, 20%, and 30% CW. Measurement results for each assessment method include correlation with CW condition and repeatability data. Measured values showed significant spatial variation, illustrating that CW level is not uniform throughout a component. Mechanical properties (tensile testing, hardness) were found to correlate most linearly with the amount of imparted CW

Social cost considerations and legal constraints in implementing modular integrated utility systems

Social costs associated with the design, demonstration, and implementation of the Modular Integrated Utility System are considered including the social climate of communities, leadership patterns, conflicts and cleavages, specific developmental values, MIUS utility goal assessment, and the suitability of certian alternative options for use in a program of implementation. General considerations are discussed in the field of socio-technological planning. These include guidelines for understanding the conflict and diversity; some relevant goal choices and ideas useful to planners of the MIUS facility

Dynamics of axial separation in long rotating drums

We propose a continuum description for the axial separation of granular materials in a long rotating drum. The model, operating with two local variables, concentration difference and the dynamic angle of repose, describes both initial transient traveling wave dynamics and long-term segregation of the binary mixture. Segregation proceeds through ultra-slow logarithmic coarsening.Comment: 4 pages, 3 Postscript figures; submitted to PR

Spacelab 3: Research in microgravity

The Spacelab 3 mission, which focused on research in microgravity, took place during the period April 29 through May 6, 1985. Spacelab 3 was the second flight of the National Aeronautics and Space Administration's modular Shuttle-borne research facility. An overview of the mission is presented. Preliminary scientific results from the mission were presented by investigators at a symposium held at Marshall Space Flight Center on December 4, 1985. This special issue is based on reports presented at that symposium

Evaluation of Three Rapid Tests for Diagnosis of P. Falciparum and P. Vivax Malaria in Colombia.

The diagnostic capacity of three malaria rapid diagnostic tests (RDTs), NOW-Malaria-ICT, OptiMAL-IT, and Paracheck-Pf, was evaluated against expert microscopy in Colombia. We tested 896 patients, of whom microscopy confirmed 139 P. falciparum, 279 P. vivax, and 13 mixed P.f/P.v infections and 465 negatives. Paracheck-Pf and NOW-malaria-ICT were more accurate in detecting P. falciparum (sensitivities 90.8% and 90.1%, respectively) in comparison with Optimal-IT (83.6%). NOW showed an acceptable Pf detection rate at low densities (< 500/microL), but resulted in a higher proportion of false positives. For P. vivax diagnosis, Optimal-IT had a higher sensitivity than NOW (91.0% and 81.4%, respectively). The choice between the two Pf/Pv detecting RDTs balances P. falciparum and P. vivax detection rates. Considering some degree of P. falciparum overtreatment and failure to detect all P. vivax cases as more acceptable than missing some cases of P. falciparum, we recommend careful implementation of NOW-malaria-ICT in areas where microscopy is lacking. The price is however still a constraint

Quantifying nonorthogonality

An exploratory approach to the possibility of analyzing nonorthogonality as a quantifiable property is presented. Three different measures for the nonorthogonality of pure states are introduced, and one of these measures is extended to single-particle density matrices using methods that are similar to recently introduced techniques for quantifying entanglement. Several interesting special cases are considered. It is pointed out that a measure of nonorthogonality can meaningfully be associated with a single mixed quantum state. It is then shown how nonorthogonality can be unlocked with classical information; this analysis reveals interesting inequalities and points to a number of connections between nonorthogonality and entanglement.Comment: Accepted for publication in Phys. Rev.

Falls prevention in community care: 10 years on

Background: A million older people living in Australia receive community care services each year due to experiencing functional or mental health difficulties. This group may be at greater risk of falling than similar-aged people not receiving services. However, there is limited falls prevention research for this population. Purpose: The aim of this study was to identify the falls prevalence rates of older people from 10 Australian community care organizations and compare current falls prevention data to a study 10 years prior that utilized the same 10 organizations. This study also identified factors associated with falling for this population. Patients and methods: This is a cross-sectional descriptive study, in which 5,338 questionnaires were mailed to a random sample of community care recipients aged $65 years. Results: A total of 1,991 questionnaires were returned (37.3%), with 47.7% of respondents having fallen in the previous year, and 32.7% in the month prior to completing the questionnaire, similar to 10 years prior. Community care clients had a 50% higher falls rate than that reported for similar-aged people not receiving services, and this remained unchanged over the last 10 years. Eighty-six per cent of fallers had fallen once or twice, and 60% reported being injured. Thirty-six per cent of respondents reported not being able to get up independently, and only 27.4% of fallers were referred to a falls prevention program (significantly fewer than 10 years ago; 95% CI: 0.821–6.366, p=0.01). Balance issues (odds ratio [OR]: 2.06, 95% CI: 1.288–3.290, p=0.003) and perceived risk of falling in the future being “definite” (OR: 6.42, 95% CI: 1.890–21.808, p=0.003) or “unsure” (OR: 3.31, 95% CI: 1.144–9.544, p=0.027) were risk factors associated with falling. In contrast, individuals referred to a falls prevention intervention had a 47% reduced likelihood of having fallen (95% CI: 0.281–0.988, p=0.046). Conclusion: Community care clients should have their falls risk routinely assessed, and at-risk individuals be offered falls prevention advice and referral to fall prevention programs