The University of St. Thomas (UST) Observatory is an educational facility integrated into UST’s u... more The University of St. Thomas (UST) Observatory is an educational facility integrated into UST’s undergraduate curriculum as well as the curriculum of several local schools. Three characteristics combine to make the observatory unique. First, the telescope is tied directly to the support structure of a four-story parking ramp instead of an isolated pier. Second, the facility can be operated remotely over an Internet connection and is capable of performing observations without a human operator. Third, the facility is located on campus in the heart of a metropolitan area where light pollution is severe. Our tests indicate that, despite the lack of an isolated pier, vibrations from the ramp do not degrade the image quality at the telescope. The remote capability facilitates long and frequent observing sessions and allows others to use the facility without traveling to UST. Even with the high background due to city lights, the sensitivity and photometric accuracy of the system are suffic...
Apparatus for spin-polarized inverse photoemission and spin scattering. [Proceedings of SPIE 3945... more Apparatus for spin-polarized inverse photoemission and spin scattering. [Proceedings of SPIE 3945, 6 (2000)]. Takashi Komesu, Carlo Waldfried, Hae-kyung Jeong, David P. Pappas, T. Rammer, Marty E. Johnston, Tim J. Gay, Peter A. Dowben. Abstract. ...
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2013
The behavior of a chaotic physical pendulum is significantly modified through the addition of a m... more The behavior of a chaotic physical pendulum is significantly modified through the addition of a magnetic interaction. The extended behavior is studied through identifying distinct characteristics in the Poincaré sections and turning point maps of the systems. The validity of our model is shown through simulated bifurcations generated from coefficients estimated at a number of different frequencies. These simulated bifurcations also demonstrate that coefficients estimated at one frequency can be used to predict the behavior of the system at a different drive frequency. A quantitative measure of the correlation dimension shows that the simulated Poincaré diagrams are in good agreement with experiment and theory. Possible sources of bias in modeled systems are identified.
The University of St. Thomas (UST) Observatory is an educational facility integrated into UST’s u... more The University of St. Thomas (UST) Observatory is an educational facility integrated into UST’s undergraduate curriculum as well as the curriculum of several local schools. Three characteristics combine to make the observatory unique. First, the telescope is tied directly to the support structure of a four-story parking ramp instead of an isolated pier. Second, the facility can be operated remotely over an Internet connection and is capable of performing observations without a human operator. Third, the facility is located on campus in the heart of a metropolitan area where light pollution is severe. Our tests indicate that, despite the lack of an isolated pier, vibrations from the ramp do not degrade the image quality at the telescope. The remote capability facilitates long and frequent observing sessions and allows others to use the facility without traveling to UST. Even with the high background due to city lights, the sensitivity and photometric accuracy of the system are suffic...
Apparatus for spin-polarized inverse photoemission and spin scattering. [Proceedings of SPIE 3945... more Apparatus for spin-polarized inverse photoemission and spin scattering. [Proceedings of SPIE 3945, 6 (2000)]. Takashi Komesu, Carlo Waldfried, Hae-kyung Jeong, David P. Pappas, T. Rammer, Marty E. Johnston, Tim J. Gay, Peter A. Dowben. Abstract. ...
Chaos: An Interdisciplinary Journal of Nonlinear Science, 2013
The behavior of a chaotic physical pendulum is significantly modified through the addition of a m... more The behavior of a chaotic physical pendulum is significantly modified through the addition of a magnetic interaction. The extended behavior is studied through identifying distinct characteristics in the Poincaré sections and turning point maps of the systems. The validity of our model is shown through simulated bifurcations generated from coefficients estimated at a number of different frequencies. These simulated bifurcations also demonstrate that coefficients estimated at one frequency can be used to predict the behavior of the system at a different drive frequency. A quantitative measure of the correlation dimension shows that the simulated Poincaré diagrams are in good agreement with experiment and theory. Possible sources of bias in modeled systems are identified.
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