1947-07-31, Kenneth to William

https://digitalcommons.chapman.edu/wvasos_collection/1062/thumbnail.jp

Technology use in a middle school in 1997 and 2007

The purpose of this study was to determine if any changes in technology integration and adoption of computer technology had taken place at ABC Middle School from the initial pilot study in 1997 and the follow-up study in 2007. This research looked for changes in the teachers\u27 computer anxieties, attitudes and computer use from the previous study. Research showed that teacher anxiety had an impact on the teachers\u27 willingness to integrate the technology into their curriculum. So it is important to understand the anxiety level in order to assess the willingness-to-integrate level.;This study also looked at the computer technology infrastructure; including the physical components, connectivity, and training in 2007. A comparison was also made to see how the infrastructure had changed since 1996. Research showed that in order to have strong technology integration, the infrastructure must be kept up-to-date and accessible. Finally the study looked at the impact these changes had on the school. Technology impact looked the level (frequency of) integration, attitudes, and training in the school. Research showed that by having a strong technology strategy, the impact of the technology in the school increases.;Results from the study found that teachers have less anxiety towards using computers in 2007 than they did in 1997. There is an even more negative correlation between the level of anxiety and level of training. Teachers still had an overall positive attitude about the use of computers, but still have some frustrations. Lack of time, not enough of the right kind of training, and frustration over the outdated computers were major areas of concern that were found in the study.;The infrastructure of the school had definitely increased, with more computers and faster computers. Internet connection, e-mail and a Local Area Network also enhanced the technology in 2007. Other devices, such as the interactive whiteboard and increased security features have also been incorporated into the school. Teacher training had also become more specific. The level of training had increased from 1997 to 2007, yet many teachers still feel they could benefit from more training when it comes to using the new technology. Developing different training strategies and providing time and support for the teachers would enhance their technology integration.;Technology has had an impact on the teachers. Findings from this study showed that all of the teachers in 2007 were using the technology to some degree. Major uses include Edline(TM)/Gradequick, use of the Internet for lesson development, curriculum planning, and communicating with parents via e-mail. All of these are examples showing the teachers\u27 readiness in adopting the technology, and these applications were not even possible in 1997. Technology will be part of the future and it is important that the school continues to increase its infrastructure, provide support and training, and encourage technology to further enhance the education of the students. This study provided a guideline for the school to plan better ways to further integrate and implement the technology in the future

Analysis, design, fabrication and testing of an optical tip clearance sensor

Analyses and the design, fabrication, and testing of an optical tip clearance sensor with intended application in aircraft propulsion control systems are reported. The design of a sensor test rig, evaluation of optical sensor components at elevated temperatures, sensor design principles, sensor test results at room temperature, and estimations of sensor accuracy at temperatures of an aircraft engine environment are discussed. Room temperature testing indicated possible measurement accuracies of less than 12.7 microns (0.5 mils). Ways to improve performance at engine operating temperatures are recommended. The potential of this tip clearance sensor is assessed

Cation Exchange Equilibria in Mixed Solvents Sorption Characteristics of Common Metals from Water-Dimethyl Sulfoxide-Hydrochloric Acid Mixed Solvent

The systematic study of sorption of Ca, Cd, Co(II), Cu(II), Fe(III), Hg(II), In(III), La, Mn, Ni(II), Th(IV), Pb, Yb, U(VI), and Zn by Dowex 50 x 8 cation exchange resin from dimethyl sulfoxide-water-hydrochloric acid mixed solvent is presented. The sorption characteristics are much the same as those found for acetone-water-hydrochloric acid mixed solvent. Major differences occur in the case of Fe(III), Ca, Mg, and Pb. Many useful separations involving these elements are indicated

The Effect of a Nonionic Surface Active Agent on the Coprecipitation of Potassium with BaS04

Studies were made of the effect of potassium concentration on the amount of potassium coprecipitation with BaSO4, and the effect of a surface active agent, Triton-X 100, on the coprecipitation of potassium with BaSO4. It was found that a log-log plot of concentration of KC1 in the solution phase vs the amount of potassium coprecipitated was linear indicating that the Freundlich adsorption isotherm was followed. This indicated that the amount of potassium coprecipitated was determined by adsorption on crystalline BaSO4. The addition of Triton-X 100 reduced the coprecipitation of potassium by as much as 20% but the improvement was limited by miceller formation at a Triton-X 100 concentration of approximately 0.3%

Mars riometer system

A riometer (relative ionospheric opacity meter) measures the intensity of cosmic radio noise at the surface of a planet. When an electromagnetic wave passes through the ionosphere collisions between charged particles (usually electrons) and neutral gases remove energy from the wave. By measuring the received signal intensity at the planet's surface and comparing it to the expected value (the quietday curve) a riometer can deduce the absorption (attenuation) of the trans-ionospheric signal. Thus the absorption measurements provide an indication of ionisation changes occurring in the ionosphere. To avoid the need for orbiting sounders riometers use the cosmic noise background as a signal source. Earth-based systems are not subject to the challenging power, volume and mass restriction that would apply to a riometer for Mars. Some Earth-based riometers utilise phased-array antennas in order to provide an imaging capability.UnpublishedVienna - Austria3.9. Fisica della magnetosfera, ionosfera e meteorologia spazialeope

Phase lag in epidemics on a network of cities

We study the synchronisation and phase-lag of fluctuations in the number of infected individuals in a network of cities between which individuals commute. The frequency and amplitude of these oscillations is known to be very well captured by the van Kampen system-size expansion, and we use this approximation to compute the complex coherence function that describes their correlation. We find that, if the infection rate differs from city to city and the coupling between them is not too strong, these oscillations are synchronised with a well defined phase lag between cities. The analytic description of the effect is shown to be in good agreement with the results of stochastic simulations for realistic population sizes.Comment: 10 pages, 6 figure

Components of multifractality in the Central England Temperature anomaly series

We study the multifractal nature of the Central England Temperature (CET) anomaly, a time series that spans more than 200 years. The series is analyzed as a complete data set and considering a sliding window of 11 years. In both cases, we quantify the broadness of the multifractal spectrum as well as its components defined by the deviations from the Gaussian distribution and the influence of the dependence between measurements. The results show that the chief contribution to the multifractal structure comes from the dynamical dependencies, mainly the weak ones, followed by a residual contribution of the deviations from Gaussianity. However, using the sliding window, we verify that the spikes in the non-Gaussian contribution occur at very close dates associated with climate changes determined in previous works by component analysis methods. Moreover, the strong non-Gaussian contribution found in the multifractal measures from the 1960s onwards is in agreement with global results very recently proposed in the literature.Comment: 21 pages, 10 figure

Semiclassical mechanics of a non-integrable spin cluster

We study detailed classical-quantum correspondence for a cluster system of three spins with single-axis anisotropic exchange coupling. With autoregressive spectral estimation, we find oscillating terms in the quantum density of states caused by classical periodic orbits: in the slowly varying part of the density of states we see signs of nontrivial topology changes happening to the energy surface as the energy is varied. Also, we can explain the hierarchy of quantum energy levels near the ferromagnetic and antiferromagnetic states with EKB quantization to explain large structures and tunneling to explain small structures.Comment: 9 pages. For related works see "http://www.msc.cornell.edu/~clh/clh.html

Extension of SPIS to simulate dust electrostatic charging, transport and contamination of lunar probes

A modification of the Spacecraft Plasma Interaction Software has been undertaken under ESA contract 4000107327/12/NL/AK (SPIS-DUST). The primary goal is to provide mission designers with an engineering tool capable of predicting charged dust behavior in a given plasma environment involving a spacecraft / exploration unit in contact with complex topological features at various locations of the Moon’s surface. The tool also aims at facilitating dust contamination diagnostics for sensitive surfaces such as sensors optics, solar panels, thermal interfaces, etc. In this paper, the new user interface and the new numerical solvers developed in the frame of this project is presented. The pre-processing includes the building of a 3D lunar surface from a topology description (i.e. a point list), an interface to position the spacecraft and a merging interface for the spacecraft elements in contact with the lunar surface. Concerning the physical models, the new solvers have been developed in order to model the physics of the ejection of the dust from the soils, the dusts charging and transport in volume and the dust interaction and contamination of the spacecraft. The post-processing includes the standard outputs of SPIS for the electrostatic computation and the plasma plus dedicated instruments for the diagnosis of the dusts. A set of verification test cases are presented in order to demonstrate the new capabilities of this version of SPIS in realistic conditions