1,737 research outputs found
The Effectiveness of the Presentation and Removal of Money as Reward and Punishment in a Paired-Associate-Constant Order Learning Task
This type of research is believed to be important because of the implications it would seem to have for educational techniques. For example, a program could be instituted at the high school level whereby students would be rewarded with money for maintaining a certain academic standard but punished by the removal of a portion of this money for dropping below that standard. This technique might, in addition to facilitating their learning, act as a motivator in keeping them in school since many students drop out in order to make some money
Nowcasting ETAS Earthquakes: Information Entropy of Earthquake Catalogs
Earthquake nowcasting has been proposed as a means of tracking the change in
large earthquake potential in a seismically active area. The method was
developed using observable seismic data, in which probabilities of future large
earthquakes can be computed using Receiver Operating Characteristic (ROC)
methods. Furthermore, analysis of the Shannon information content of the
earthquake catalogs has been used to show that there is information contained
in the catalogs, and that it can vary in time. So an important question
remains, where does the information originate? In this paper, we examine this
question using statistical simulations of earthquake catalogs computed using
Epidemic Type Aftershock Sequence (ETAS) simulations. ETAS earthquake
simulations are currently in widespread use for a variety of tasks, in
modeling, analysis and forecasting. After examining several of the standard
ETAS models, we propose a version of the ETAS model that conforms to the
standard ETAS statistical relations of magnitude-frequency scaling, aftershock
scaling, Bath's law, and the productivity relation, but with an additional
property. We modify the model to introduce variable non-Poisson aftershock
clustering, inasmuch as we test the hypothesis that the information in the
catalogs originates from aftershock clustering. We find that significant
information in the catalogs arises from the non-Poisson aftershock clustering,
implying that the common practice of de-clustering catalogs may remove
information that would otherwise be useful in forecasting and nowcasting. We
also show that the nowcasting method provides similar results with the the ETAS
models as it does with observed seismicity.Comment: 17 pages, 3 figures, 1 tabl
Modeling of electric power demand growth
Paper given at MIT conference entitled Energy: Demand, Conservation and Institutional Problems, February 12-15, 197
The Psychological and Physiological Effects of Music on Athletic Performance
Please view abstract in the attached PDF file
Ac transport studies in polymers by a resistor network and transfer matrix approaches: application to polyaniline
A statistical model of resistor network is proposed to describe a polymer
structure and to simulate the real and imaginary components of its ac
resistivity. It takes into account the polydispersiveness of the material as
well as intrachain and interchain charge transport processes. By the
application of a transfer matrix technique, it reproduces ac resistivity
measurements carried out with polyaniline films in different doping degrees and
at different temperatures. Our results indicate that interchain processes
govern the resistivity behavior in the low frequency region while, for higher
frequencies, intrachain mechanisms are dominant.Comment: LaTeX file, 15 pages, 5 ps figures, to appear in Phys. Rev.
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