4,438 research outputs found
Stress redistribution due to creep in nimonic 90 ministry of aviation contract no. PD/28/021 report for the period June, 1965 to July, 1966: part 2
Part I of this report, dated September 1965, deals mainly with
the design and construction of the special apparatus to simulate the
stress redistribution occurring during the creep of a cooled turbine
blade. It reported some preliminary experiments using aluminium alloy
test specimens.
During the past year, the period covered by this report, a series
of experiments have been completed using specimens machined from nimonic
90 alloy.
Experience gained in operating the apparatus, have resulted in
several modifications both to the apparatus and the associated instrumentation.
These are detailed within this report
Stress redistribution due to creep in nimonic 90 ministry of aviation contract no. PD/28/021 report for the period January 1964 - June 1965: part 1
The period covered by this report has been devoted to the design,
construction development and calibration of a special apparatus to simulate
the stress redistribution conditions occurring during the creep of a cooled
turbine blade. The experimental assembly consists of two creep machines,
each operating at a different temperature, so controlled that a load is
shared between them. maintaining equal creep strains (and in consequence
equal creep rates) in each specimen. The stress in each specimen and the
creep strain of the pair are automatically measured and recorded by a
specially developed unit. Some preliminary results on an aluminium alloy
are presented
Configural information processing in audit evidence evaluation / 1569
Includes bibliographical references (p. 28-30)
Auditor configural information processing in control risk appraisal / 1585
Includes bibliographical references (p. 30-33)
Aircraft electromagnetic compatibility
Illustrated are aircraft architecture, electromagnetic interference environments, electromagnetic compatibility protection techniques, program specifications, tasks, and verification and validation procedures. The environment of 400 Hz power, electrical transients, and radio frequency fields are portrayed and related to thresholds of avionics electronics. Five layers of protection for avionics are defined. Recognition is given to some present day electromagnetic compatibility weaknesses and issues which serve to reemphasize the importance of EMC verification of equipment and parts, and their ultimate EMC validation on the aircraft. Proven standards of grounding, bonding, shielding, wiring, and packaging are laid out to help provide a foundation for a comprehensive approach to successful future aircraft design and an understanding of cost effective EMC in an aircraft setting
Bank deposit growth in the Eighth Federal Reserve District
Federal Reserve District, 8th ; Bank deposits
Farm credit developments in the central Mississippi valley
Agricultural credit ; Federal Reserve District, 8th
Space station particulate contamination environment
The origin of particulate contamination on the Space Station will mostly be from pre-launch operations. The adherence and subsequent release of these particles during space flight are discussed. Particle size, release velocity, and release direction are important in determining particle behavior in the vicinity of the vehicle. The particulate environment at the principal science instrument locations is compared to the space shuttle bay environment. Recommendations for possibly decreasing the particulate contamination are presented
Cost-effectiveness of physical fitness training for stroke survivors
Background Physical fitness is impaired after stroke, yet fitness training after stroke reduces disability. Several international guidelines recommend that fitness training be incorporated as part of stroke rehabilitation. However, information about cost-effectiveness is limited.
Methods A decision tree model was used to estimate the cost-effectiveness of a fitness programme for stroke survivors vs. relaxation (control group). This was based on a published randomised controlled trial, from which evidence about quality of life was used to estimate Quality Adjusted Life Years. Costs were based on the cost of the provision of group fitness classes within local community centres and a cost per Quality Adjusted Life Year was calculated.
Results The results of the base case analysis found an incremental cost per Quality Adjusted Life Year of £2,343.
Conclusions Physical fitness sessions after stroke are a cost-effective intervention for stroke survivors. This information will help make the case for the development of new services
Sulfur in coal and coke
Thesis (B.S.)--University of Illinois, 1919.Typescript.Includes bibliographical references (leaf [17])
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