Precision voltage regulator

Balanced positive and negative voltage output circuit, in which error voltage for control is developed from difference in absolute value of positive and negative voltages referenced to a common point, regulates voltage for use with inertial reference unit. Fast-acting, temperature-compensated, high-gain operational amplifier circuits maintain common point

Electronic integrator for gyro rate output voltages

Circuit which integrates spacecraft gyro output voltages to provide analog position signals has been developed. Accurate integration is provided by all solid state system which uses no choppers and takes advantage of commercially available flight qualified components

Note on the cock's comb test for the activity of ergot

n/

Crossover from weak localization to weak antilocalization in a disordered microbridge

We calculate the weak localization correction in the double crossover to broken time-reversal and spin-rotational symmetry for a disordered microbridge or a short disordered wire using a scattering-matrix approach. Whereas the correction has universal limiting values in the three basic symmetry classes, the functional form of the magnetoconductance is affected by eventual non-homogeneities in the microbridge.Comment: 5 pages, RevTeX; 2 figure

The most significant lessons about the most significant change technique

This article presents field-based insights into the application of the Most Significant Change (MSC) technique as a method to monitor social change resulting from a development intervention. Documentation of this innovative qualitative monitoring technique is slowly growing, but is mostly limited to grey literature. In particular, there is a lack of rigorous investigation to assess the complexities and challenges of applying the technique with integrity in the development context. The authors employ a conceptual model of monitoring and evaluation practicalities (the 'M&E Data Cycle') for a systematic examination of the challenges to, and key components of, successful application of the MSC technique. They provide a detailed analysis of how MSC was employed in two projects in Laos, extracting the lessons learned and insights generated. This practice-based information can inform future deployment of the MSC technique and contribute to its development

The Devil as a Dramatic Figure in the Spanish Religious Drama before Lope de Vega

While many Spanish plays of the sixteenth century have recently been published, comparatively little attention has been paid to some of the characters which constantly appear in these plays. In the drama of the sixteenth century we find many characters which were developed by the more skillful dramatists of the following century and a study of these earlier plays is necessary to a complete understanding of the more finished products. It is the purpose of this article to study the Devil as a dramatic figure in the Spanish religious drama before Lope de Vega. Appended is a list of the plays which were accessible to me in which the Devil appears, and they are grouped for the sake of convenience into Mysteries, Plays on the Lives of Saints and Moralities

Heat sterilizable and impact resistant Ni-Cd battery development Quarterly report, 1 Apr. - 30 Jun. 1969

Electrochemistry, battery engineering, and impact tests of heat sterilizable nickel cadmium cell

Net energy analysis of solar and conventional domestic hot water systems in Melbourne, Australia

It is commonly assumed that solar hot water systems save energy and reduce greenhouse gas emissions. Very rarely has the life-cycle energy requirements of solar hot water systems been analysed, including their embodied energy. The extent to which solar hot water systems save energy compared to conventional systems in Melbourne, Australia, is shown through a comparative net energy analysis. The solar systems provided a net energy saving compared to the conventional systems after 0.5 to 2 years, for electricity and gas systems respectively.<br /

Predicting transit times and flow concentrations of contaminants through a metropolitan sewage system

Neural Networks were used to build a model that would predict the transit times and the levels of trace amounts of radioactive components at the outlet of a sewage treatment plant. The Neural Networks are compared with more conventional approximation methods as a tool for prediction

Eight New Radio Pulsars in the Large Magellanic Cloud

We present the discovery of eight new radio pulsars located in the Large Magellanic Cloud (LMC). Five of these pulsars were found from reprocessing the Parkes Multibeam Survey of the Magellanic Clouds, while the remaining three were from an ongoing new survey at Parkes with a high-resolution data acquisition system. It is possible that these pulsars were missed in the earlier processing due to radio frequency interference, visual judgment or the large number of candidates that must be analysed. One of these new pulsars has a dispersion measure of 273 pc cm−3, almost twice the highest previously known value, making it possibly the most distant LMC pulsar. In addition, we present the null result of a radio pulse search of an X-ray point source located in SNR J0047.2−7308 in the Small Magellanic Cloud (SMC). Although no millisecond pulsars have been found, these discoveries have increased the known rotation-powered pulsar population in the LMC by more than 50 per cent. Using the current sample of LMC pulsars, we used a Bayesian analysis to constrain the number of potentially observable pulsars in the LMC to within a 95 per cent credible interval of 57 000+70000−30000. The new survey at Parkes is ∼20 per cent complete, and it is expected to yield at most six millisecond pulsars in the LMC and SMC. Although it is very sensitive to short period pulsars, this new survey provides only a marginal increase in sensitivity to long periods. The limiting luminosity for this survey is 125 mJy kpc2 for the LMC which covers the upper 10 per cent of all known radio pulsars. The luminosity function for normal pulsars in the LMC is consistent with their counterparts in the Galactic disc. The maximum 1400 MHz radio luminosity for LMC pulsars is ∼1000 mJy kpc2