The velocity of saponification of fats and oils by potassium hydroxide in different solvents

The purpose of the investigation was to determine the influence of certain factors on the velocity of saponification of fats and oils by potassium hydroxide. The idea of measuring the velocity of a reaction was first suggested by K. F. Wenzel in 1777. Wenzel defined the velocity of a reaction as the ratio, ( x/d±\ of the amount of substance changed to the time in which it is changed. This definition is still accepted. The factors influencing the velocity of a reaction are, in general, the concentration of the reacting substances, the temperature, the pressure, the solvent, catalytic agents, and the homogenity or heterogenity of the system. Of these, the factors that need to be considered in this work are: (a) Concentration of reacting substances (b) Temperature (c) Solvent (d) Catalytic agents. The influence of concentration on the velocity of reaction is best stated by the law of mass action; the velocit

THE FOURTH COLOUR FILTER OF TRISTIMULUS COLORIMETERS

We have proved that the application of the tristimulus value Xz seems to be unnecessary. It can be suggested that the measuring of the tristimulus value Xz should be left and the sign X2 should be defined from the measured value Z on the base of the following connection: Z X.",,-- - 5,982 It would be more proper to neglect the use of the tristirnulus value X2 but this would need the total reconstructing of the CIE colour-system

Gravity field determination and error assessment techniques

Linear estimation theory, along with a new technique to compute relative data weights, was applied to the determination of the Earth's geopotential field and other geophysical model parameters using a combination of satellite ground-based tracking data, satellite altimetry data, and the surface gravimetry data. The relative data weights for the inhomogeneous data sets are estimated simultaneously with the gravity field and other geophysical and orbit parameters in a least squares approach to produce the University of Texas gravity field models. New techniques to perform calibration of the formal covariance matrix for the geopotential solution were developed to obtain a reliable gravity field error estimate. Different techniques, which include orbit residual analysis, surface gravity anomaly residual analysis, subset gravity solution comparisons and consider covariance analysis, were applied to investigate the reliability of the calibration

Virtual acoustics displays

The real time acoustic display capabilities are described which were developed for the Virtual Environment Workstation (VIEW) Project at NASA-Ames. The acoustic display is capable of generating localized acoustic cues in real time over headphones. An auditory symbology, a related collection of representational auditory 'objects' or 'icons', can be designed using ACE (Auditory Cue Editor), which links both discrete and continuously varying acoustic parameters with information or events in the display. During a given display scenario, the symbology can be dynamically coordinated in real time with 3-D visual objects, speech, and gestural displays. The types of displays feasible with the system range from simple warnings and alarms to the acoustic representation of multidimensional data or events

Generation of Warm Dense Plasma on Solar Panel Infrastructure in Exo-Atmospheric Conditions

The use of a weaponized thermo-nuclear device in exo-atmospheric conditions would be of great impact on the material integrity of orbiting satellite infrastructure. Particular damage would occur to the multi-layered, solar cell components of such satellites. The rapid absorption of X-ray radiation originating from a nuclear blast into these layers occurs over a picosecond time scale and leads to the generation of Warm Dense Plasma (WDP). While incredibly difficult and costly to replicate in a laboratory setting, a collection of computational techniques and software libraries may be utilized to simulate the intricate atomic and subatomic physics characteristics of such an event. Use of the Monte Carlo sampling method within the Geant4 software library allows for the energy deposition and power density profiles by X-rays into this system to be determined. By understanding and modeling the different factors which can affect the absorption of thermonuclear X-ray radiation, specifically, “cold –X-ray radiation,” in the energy range of approximately 1 to 1.5 keV, the molecular dynamics modeling of WDP generation and evolution can be performed using the LAMMPS code library. One aspect modeled and utilized within this software is the Planck blackbody spectrum of X-rays, assumed to be emitted by the detonation. Another such factor explored is the effect of primary and secondary particle backscattering within the active solar cell layer. Ultimately, it was determined that the primary and secondary particle backscattering of photons and electrons occurs at such a relatively low rate that its effect on the properties of the generated WDP is negligible. Once the energy deposition and power density profiles are determined, LAMMPS is utilized in order to understand the spatio-temporal evolution of the WDP as well as the temperature, stress, and mass density distribution within the material, at its surface, and its immediate vacuum surroundings

James Murphy

Report : Petition of S. Wenzel. [2816] Black Hawk war; 1832