Weld-bonded titanium structures

Structurally stronger titanium articles are produced by a weld-bonding technique comprising fastening at least two plates of titanium together using spotwelding and curing an adhesive interspersed between the spot-weld nuggets. This weld-bonding may be employed to form lap joints or to stiffen titanium metal plates

Tax Reform in Nevada: Ideas for Creating a More Stable Revenue Structure

Recurring and fluctuating levels of economic activity known as the business cycle have a profound impact on state legislators trying to balance their finances. They result in higher unemployment, declines in revenues and a corresponding increase in the need for social welfare and public services. This makes state budgeting particularly complex during times of contraction when the state needs to do more with less. Nevada, with its limited tax base, biennial budget making, and overreliance on an industry that is highly volatile in response to economic fluctuations, experiences particularly dramatic upswings and shortfalls. Contractionary fiscal policies such as tax increases and spending cuts can slow economic recovery but are unavoidable in order to balance the budget during times of recession. This policy brief will contend that Nevada needs to reform its revenue structure in order to better stabilize budgetary volatility in response to the business cycle and more effectively reflect the 21st-century economy. While tax reform is an issue that is revisited regularly by Nevada lawmakers with each legislative session and promises on the campaign trail, little actual progress is made because of Constitutional obstacles, special interests, lack of political will because the risk of reprimand at the ballot or poorly implemented political strategy. This brief will identify the historical and recurring barriers to tax reform in Nevada as well as list four recommendations for creating a broader, fairer and more stable tax structure including closing loopholes, diversifying and broadening the base, reflecting contemporary consumption habits, and tapping into Nevada’s unique opportunity to create a recession-proof revenue stream. Finally, it will provide a possible roadmap for how these policy changes can more effectively become a reality. The ideas discussed here are by no means comprehensive as there are a myriad of further reform possibilities, particular in regard to the relation of county and municipal taxes

The development of thermally stable adhesives for titanium alloy and boron composite structures

Developing thermally stable adhesives for bonding titanium alloy and boron composite substrate

Guidance and control system research for improved terminal area operations

Several guidance and control system research and development activities aimed at improving the operational capabilities of commercial aircraft in the terminal area are described. The guidance and control systems were designed to improve the capacity and efficiency of terminal area operations, enhance the approach and landing capability of aircraft in adverse weather conditions, and reduce the impact of aircraft noise perceived on the ground. Specific performance features include the ability to capture and track steep glideslopes, use short final approaches, perform flares with reduced longitudinal touchdown dispersion and execute high speed runway rollout and turnoff. Results obtained from simulation studies or flight tests are shown for each of the algorithms

Flight evaluation of a simple total energy-rate system with potential wind-shear application

Wind shears can create havoc during aircraft terminal area operations and have been cited as the primary cause of several major aircraft accidents. A simple sensor, potentially having application to the wind-shear problem, was developed to rapidly measure aircraft total energy relative to the air mass. Combining this sensor with either a variometer or a rate-of-climb indicator provides a total energy-rate system which was successfully applied in soaring flight. The measured rate of change of aircraft energy can potentially be used on display/control systems of powered aircraft to reduce glide-slope deviations caused by wind shear. The experimental flight configuration and evaluations of the energy-rate system are described. Two mathematical models are developed: the first describes operation of the energy probe in a linear design region and the second model is for the nonlinear region. The calculated total rate is compared with measured signals for many different flight tests. Time history plots show the tow curves to be almost the same for the linear operating region and very close for the nonlinear region

Routine hand hygiene audit by direct observation: has nemesis arrived?

Infection prevention and control experts have expended valuable health service time developing and implementing tools to audit health workers' hand hygiene compliance by direct observation. Although described as the ‘gold standard’ approach to hand hygiene audit, this method is labour intensive and may be inaccurate unless performed by trained personnel who are regularly monitored to ensure quality control. New technological devices have been developed to generate ‘real time’ data, but the cost of installing them and using them during routine patient care has not been evaluated. Moreover, they do not provide as much information about the hand hygiene episode or the context in which hand hygiene has been performed as direct observation. Uptake of hand hygiene products offers an inexpensive alternative to direct observation. Although product uptake would not provide detailed information about the hand hygiene episode or local barriers to compliance, it could be used as a continuous monitoring tool. Regular inspection of the data by infection prevention and control teams and clinical staff would indicate when and where direct investigation of practice by direct observation and questioning of staff should be targeted by highly trained personnel to identify local problems and improve practice

Controlling the Frequency-Temperature Sensitivity of a Cryogenic Sapphire Maser Frequency Standard by Manipulating Fe3+ Spins in the Sapphire Lattice

To create a stable signal from a cryogenic sapphire maser frequency standard, the frequency-temperature dependence of the supporting Whispering Gallery mode must be annulled. We report the ability to control this dependence by manipulating the paramagnetic susceptibility of Fe3+ ions in the sapphire lattice. We show that the maser signal depends on other Whispering Gallery modes tuned to the pump signal near 31 GHz, and the annulment point can be controlled to exist between 5 to 10 K depending on the Fe3+ ion concentration and the frequency of the pump. This level of control has not been achieved previously, and will allow improvements in the stability of such devices.Comment: 17 pages, 10 figure

Evaluation of a total energy-rate sensor on a transport airplane

A sensor that measures the rate of change of total energy of an airplane with respect to the airstream has been evaluated. The sensor consists of two cylindrical probes located on the fuselage of a transport airplane, an in line acoustic filter, and a pressure sensing altitude rate transducer. Sections of this report include the sensor description and experimental configuration, frequency response tests, analytical model development, and flight test results for several airplane maneuvers. The results section includes time history comparisons between data generated by the total energy rate sensor and calculated data derived from independent sources

Improved cryogenic resin/glass-filament-wound composites Interim report, 29 Jun. 1965 - 28 Mar. 1966

Interlaminar-shear testing of resin-filament wound composite materials for cryogenic us