Estimating Solid-Liquid Phase Change Enthalpies and Entropies

Estimating Solid-Liquid Phase Change Enthalpies and Entropies

Date: 1999
Creator: Chickos, James S.; Acree, William E. (William Eugene) & Liebman, Joel F.
Description: This article discusses estimating solid-liquid phase change enthalpies and entropies.
Contributing Partner: UNT College of Arts and Sciences
The Dynamics of EEG Entropy

The Dynamics of EEG Entropy

Date: March 5, 2009
Creator: Ignaccolo, Massimiliano; Latka, Miroslaw; Jernajczyk, Wojciech; Grigolini, Paolo & West, Bruce J.
Description: This article discusses the dynamics of EEG entropy.
Contributing Partner: UNT College of Arts and Sciences
Equation of State and Heat Content of Uranium

Equation of State and Heat Content of Uranium

Date: February 20, 1957
Creator: Brout, Robert H.
Description: Report issued by the APDA over studies conducted on the state of uranium at different temperature and pressure. Calculations are presented for the differing pressures of uranium. This report includes tables.
Contributing Partner: UNT Libraries Government Documents Department
Random growth of interfaces: Statistical analysis of single columns and detection of critical events.

Random growth of interfaces: Statistical analysis of single columns and detection of critical events.

Access: Use of this item is restricted to the UNT Community.
Date: August 2004
Creator: Failla, Roberto
Description: The dynamics of growth and formation of surfaces and interfaces is becoming very important for the understanding of the origin and the behavior of a wide range of natural and industrial dynamical processes. The first part of the paper is focused on the interesting field of the random growth of surfaces and interfaces, which finds application in physics, geology, biology, economics, and engineering among others. In this part it is studied the random growth of surfaces from within the perspective of a single column, namely, the fluctuation of the column height around the mean value, which is depicted as being subordinated to a standard fluctuation-dissipation process with friction g. It is argued that the main properties of Kardar-Parisi-Zhang theory are derived by identifying the distribution of return times to y(0) = 0, which is a truncated inverse power law, with the distribution of subordination times. The agreement of the theoretical prediction with the numerical treatment of the model of ballistic deposition is remarkably good, in spite of the finite size effects affecting this model. The second part of the paper deals with the efficiency of the diffusion entropy analysis (DEA) when applied to the studies of stromatolites. In this case ...
Contributing Partner: UNT Libraries
Lyapunov Exponents, Entropy and Dimension

Lyapunov Exponents, Entropy and Dimension

Date: August 2004
Creator: Williams, Jeremy M.
Description: We consider diffeomorphisms of a compact Riemann Surface. A development of Oseledec's Multiplicative Ergodic Theorem is given, along with a development of measure theoretic entropy and dimension. The main result, due to L.S. Young, is that for certain diffeomorphisms of a surface, there is a beautiful relationship between these three concepts; namely that the entropy equals dimension times expansion.
Contributing Partner: UNT Libraries
The Nonadditive Generalization of Klimontovich's S-Theorem for Open Systems and Boltzmann's Orthodes

The Nonadditive Generalization of Klimontovich's S-Theorem for Open Systems and Boltzmann's Orthodes

Date: August 2008
Creator: Bagci, Gokhan Baris
Description: We show that the nonadditive open systems can be studied in a consistent manner by using a generalized version of S-theorem. This new generalized S-theorem can further be considered as an indication of self-organization in nonadditive open systems as prescribed by Haken. The nonadditive S-theorem is then illustrated by using the modified Van der Pol oscillator. Finally, Tsallis entropy as an equilibrium entropy is studied by using Boltzmann's method of orthodes. This part of dissertation shows that Tsallis ensemble is on equal footing with the microcanonical, canonical and grand canonical ensembles. However, the associated entropy turns out to be Renyi entropy.
Contributing Partner: UNT Libraries
From Knowledge, Knowability and the Search for Objective Randomness to a New Vision of Complexity

From Knowledge, Knowability and the Search for Objective Randomness to a New Vision of Complexity

Date: February 2, 2008
Creator: Allegrini, Paolo; Giuntoli, Martina; Grigolini, Paolo & West, Bruce J.
Description: Paper discussing knowledge, knowability, and the search for objective randomness to a new vision of complexity.
Contributing Partner: UNT College of Arts and Sciences
Widening the lens: An interdisciplinary approach to examining the effect of exposure therapy on public speaking state anxiety.

Widening the lens: An interdisciplinary approach to examining the effect of exposure therapy on public speaking state anxiety.

Date: August 2007
Creator: Finn, Amber N.
Description: This study used an interdisciplinary approach to examine an intervention for reducing public speaking state anxiety. A quasi-experiment was conducted to determine if a multiple-exposure treatment technique (TRIPLESPEAK) would help to attenuate public speaking anxiety. The treatment group reported experiencing significantly less state anxiety during their post-test presentation than did the control group. This lead to the conclusion that exposure therapy can be used to help students enrolled in basic communication classes begin to overcome their fear of speaking in front of an audience. Follow-up analysis of the treatment group's reported anxiety levels during all five presentations (pre-test, Treatment Presentation 1, Treatment Presentation 2, Treatment Presentation 3, and post-test) revealed an increase in anxiety from the last treatment presentation to the post-test presentation. In order to explore this issue, Shannon's entropy was utilized to calculate the amount of information in each speaking environment. Anderson's functional ontology construction approach served as a model to explain the role of the environment in shaping speakers' current and future behaviors and reports of anxiety. The exploratory analysis revealed a functional relationship between information and anxiety. In addition, a qualitative study was conducted to determine which environmental stimuli speakers perceived contributed to their anxiety levels. ...
Contributing Partner: UNT Libraries
Phase Change Enthalpies and Entropies of Liquid Crystals

Phase Change Enthalpies and Entropies of Liquid Crystals

Date: July 17, 2006
Creator: Acree, William E. (William Eugene) & Chickos, James S.
Description: Article on phase change enthalpies and entropies of liquid crystals.
Contributing Partner: UNT College of Arts and Sciences
A multi-dimensional entropy model of jazz improvisation for music information retrieval.

A multi-dimensional entropy model of jazz improvisation for music information retrieval.

Date: December 2005
Creator: Simon, Scott J.
Description: Jazz improvisation provides a case context for examining information in music; entropy provides a means for representing music for retrieval. Entropy measures are shown to distinguish between different improvisations on the same theme, thus demonstrating their potential for representing jazz information for analysis and retrieval. The calculated entropy measures are calibrated against human representation by means of a case study of an advanced jazz improvisation course, in which synonyms for "entropy" are frequently used by the instructor. The data sets are examined for insights in music information retrieval, music information behavior, and music representation.
Contributing Partner: UNT Libraries