43,010 research outputs found
Temperature telemetric transmitter Patent
Temperature telemetric transmitter with frequency determining tank circuit for short range transmissio
Product market reforms, labour market institutions and unemployment
We analyze the impact of product market competition on unemployment and wages, and how
this depends on labour market institutions. We use differential changes in regulations across
OECD countries over the 1980s and 1990s to identify the effects of competition. We find that
increased product market competition reduces unemployment, and that it does so more in
countries with labour market institutions that increase worker bargaining power. The theoretical
intuition is that both firms with market power and unions with bargaining power are constrained
in their behaviour by the elasticity of demand in the product market. We also find that the effect
of increased competition on real wages is beneficial to workers, but less so when they have high
bargaining power. Intuitively, real wages increase through a drop in the general price level, but
workers with bargaining power lose out somewhat from a reduction in the rents that they had
previously captured
Techniques for ruling improved large diffraction gratings Final report, 1 Mar. 1966 - 31 Jan. 1971
Techniques for ruling improved large diffraction grating
A pressure telemeter for wind-tunnel free-flight pressure measurement
Design and performance characteristics of pressure telemeter for use on scale models in free flight in hypersonic wind tunne
Miniature capacitive accelerometer is especially applicable to telemetry
Capacitive accelerometer design enables the construction of highly miniaturized instruments having full-scale ranges from 1 g to several hundred g. This accelerometer is applicable to telemetry and can be tailored to cover any of a large number of acceleration ranges and frequency responses
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Experimental determination of layer cloud edge charging from cosmic ray ionisation
The cloud-air transition zone at stratiform cloud edges is an electrically active region where droplet charging has been predicted. Cloud edge droplet charging is expected from vertical flow of cosmic ray generated atmospheric ions in the global electric circuit. Experimental confirmation of stratiform cloud edge electrification is presented here, through charge and droplet measurements made within an extensive layer of supercooled stratiform cloud, using a specially designed electrostatic sensor. Negative space charge up to 35 pC mâ3 was found in a thin (<100 m) layer at the lower cloud boundary associated with the clear air-cloud conductivity gradient, agreeing closely with space charge predicted from the measured droplet concentration using ion-aerosol theory. Such charge levels carried by droplets are sufficient to influence collision processes between cloud droplets
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A thermally stable tension meter for atmospheric soundings using kites
Kites offer considerable potential as wind speed sensorsâa role distinct from their traditional use
as instrument-carrying platforms. In the sensor role, wind speed is measured by kite-line tension. A
kite tether line tension meter is described here, using strain gauges mounted on an aluminum ring
in a Wheatstone bridge electronic circuit. It exhibits a linear response to tension 19.5 mV Nâ1
with good thermal stability mean drift of â0.18 N °Câ1 over 5â45 °C temperature range and a
rapid time response 0.2 s or better. Field comparisons of tether line tension for a Rokkaku kite with
a fixed tower sonic anemometer show an approximately linear tension-wind speed relationship over
the range 1â6 msâ1. © 2010 American Institute of Physics. doi:10.1063/1.346556
A controlled rate freeze/thaw system for cryopreservation of biological materials
A system which allows programmable temperature-time control for a 5 cc sample volume of an arbitrary biological material was constructed. Steady state and dynamic temperature control was obtained by supplying heat to the sample volume through resistive elements constructed as an integral part of the sample container. For cooling purposes, this container was totally immersed into a cold heat sink. Sample volume thermodynamic property data were obtained by measurements of heater power and heat flux through the container walls. Using a mixture of dry ice and alcohol at -79 C, sample volume was controlled from +40 C to -60 C at rates from steady state to + or - 65 C/min. Steady state temperature precision was better than 0.2 C while the dynamic capability depends on the temperature rate of change as well as the thermal mass of the sample and the container
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