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SUMMARY

I am a scientist with 20 years experience in radio and planetary radar astronomy including an emphasis on signal processing, computational modeling, and statistical analysis. Areas of expertise include C, Java, and Python programming, simulation of physical processes, computational statistical analysis, and optimization. I have written 9 articles in peer reviewed journals, and presented my research at local, national, and international conferences. I also have 4 years experience teaching undergraduate physics, math, and astronomy courses.

EDUCATION

Ph.D.	Department of Astronomy, University of Massachusetts, Amherst, MA. 2003 Dissertation: Models and Observations of the Millimeter and Submillimeter Molecular Line Emission of Bright-Rimmed Clouds Advisor: Gopal Narayanan
B.A.	Department of Astronomy, Cornell University, Ithaca, NY. 1995

EXPERIENCE

2012–present	Senior Mobile Programmer Tech 2000, Inc., Herndon, VA.
2011–2012	Associate Professor Department of Physics, Physical Science, and Geology California State University Stanislaus, Turlock, CA
2008–2011	Visiting Scientist Radio and Geoastronomy Division Smithosnian Astrophysical Observatory, Cambridge, MA.
2007–2011	Assistant Professor Department of Physics, Physical Science, and Geology California State University Stanislaus, Turlock, CA.
2005–2008	Research Associate Radio and Geoastronomy Division Smithsonian Astrophysical Observatory, Cambridge, MA.
2005–2007	Lecturer Department of Physics, Physical Science, and Geology California State University Stanislaus, Turlock, CA.
2005	Lecturer College of Natural Sciences University of California, Merced, CA.
2002–2005	Postdoctoral Fellow with Dr. Philip Myers Radio and Geoastronomy Division Harvard-Smithsonian Center for Astrophysics, Cambridge, MA.
1996–2002	Research Assistant to Dr. Gopal Narayanan Department of Astronomy University of Massachusetts, Amherst, MA.

OPEN SOURCE SOFTWARE PROJECTS

Total Control Lighting (p9813) Embedded Linux Library

A library for using Total Control Lighting (p9813 chip controlled 3-color LEDs) on embedded linux platforms such as the BeagleBone and the Raspberry Pi.

project | code

PixelPaint

A designer for arrays of fully programmable RGB LEDs.

project | code

Arduino Total Control Lighting Library

An Arduino library for managing strands of fully programmable RGB LEDs.

project | code

Molecular Cloud Infall Model

A program to fit radio observations of star-forming molecular clouds to physical radiative transver models of cloud collapse.

project and code

Radxfer

A general purpose 3-D molecular line radiative transfer program based on the Sobolev or Large Velocity Gradient approximation.

project and code

PUBLICATIONS

Refereed Publications

The Spitzer c2d Survey of Nearby Dense Cores XI : Infrared and Submillimeter Observations of CB130

Reference: Kim, H. J. et al. 2011, ApJ, 729, 84
Download: astro-ph | ADS

The Spitzer c2d Survey of Nearby Dense Cores: VI. The Protostars of Lynds Dark Nebula 1221

Reference: Young, C. H., et al. 2009, ApJ, 702, 340
Download: astro-ph | ADS

Dynamical and chemical properties of the "starless" core L1014

Reference: Crapsi, A., De Vries, C. H., et al. 2005, A&A, 439, 1023
Download: astro-ph | ADS

Molecular Line Profile Fitting with Analytic Radiative Transfer Models

Reference: De Vries, C. H., & Myers, P. C. 2005, ApJ, 620, 800
Download: astro-ph | ADS

A "Starless" Core that Isn't: Detection of a Source in the L1014 Dense Core with the Spitzer Space Telescope

Reference: Young, C. H. et al. 2004, ApJS, 154, 396
Download: astro-ph | ADS

Star Formation in Bright-rimmed Clouds. I. Millimeter and Submillimeter Molecular Line Surveys

Reference: De Vries, C. H., Narayanan, G., & Snell, R. L. 2002, ApJ, 577, 798
Download: astro-ph | ADS

Surface processes in the Venus highlands: Results from analysis of Magellan and Arecibo data

Reference: Campbell, B. A., Campbell, D. B., & De Vries, C. H. 1999, Journal of Geophysical Research, 104, 1897
Download: ADS

HCO⁺ Imaging of Comet C/Hale-Bopp 1995 O1

Reference: Lovell, A. J., Schloerb, F. P., Dickens, J. E., De Vries, C. H., Senay, M. C., & Irvine, W. M. 1998, ApJL, 497, L117
Download: ADS

Collisional Quenching of OH Radio Emission from Comet Hale-Bopp

Reference: Schloerb, F. P., De Vries, C. H., Lovell, A. J., Irvine, W. M., Senay, M., & Wootten, H. A. 1997, Earth, Moon, and Planets, 78, 45
Download: ADS

HCO⁺ in the Coma of Comet Hale-Bopp

Reference: Lovell, A. J., Schloerb, F. P., Bergin, E. A., Dickens, J. E., De Vries, C. H., Senay, M. C., Irvine, W. M. 1997, Earth, Moon, and Planets, 77, 253
Download: ADS

Hydrogenation of Interstellar Molecules: A Survey for Methylenimine (CH₂NH)

Reference: Dickens, J. E., Irvine, W. M., De Vries, C. H., & Ohishi, M. 1997, ApJ, 479, 307
Download: ADS

Conference Proceedings and Presentations

Fitting Outﬂow Models to Millimeter Molecular Line Observations of L1228 and L1527

Contributed Poster: 217^th Meeting of the American Astronomical Society. Seattle, WA (January 2007)

Download: google docs

The Simple Model: Fitting analytic solutions of the equation of transfer to observations reveals infall rates for star-forming molecular clouds

Colloquium: Physics and Astronomy Colloquium Series, Sacramento State (March, 2010)

Download: scribd

Line of Sight Radiative Transfer Analysis of B68 and TMC1-C

Poster Presentation: 5^th Spitzer Conference: New Light on Young Stars, Pasadena, CA (October 2008)

The Molecular Virtual Observatory: A Collaborative Approach to Comparing Models and Observations of Star Formation

Invited Talk: In Celebration of Research: Strengthening CSU's Research Collaborations. Fullerton, CA (March 2008)

Observational Signatures of Wind-Driven Triggering

Contributed Talk: 211^th Meeting of the American Astronomical Society. Austin, TX (January 2008)
Download: scribd | ADS

Star Formation in Bright-Rimmed Clouds: A Comparison of Wind-Driven Triggering with Millimeter and Submillimeter Observations

Poster Presentation: Gordon Conference on the Origins of Solar Systems. South Hadley, MA (July 2007)

The Simple Model: Fitting analytic solutions of the equation of transfer to observations reveals infall rates for star-forming molecular clouds.

Colloquium: Mathematics and Computer Science Speaker Series at California State University, Stanislaus. Turlock, CA (November 2006)

Star formation In Bright-Rimmed Clouds: a comparison of wind-driven triggering with millimeter observations

Poster Presentation: IAU Symposium 237: Triggered Star Formation in a Turbulent ISM. Prague, Czech Republic (August 2006)
Download: ADS

Analytic and Numerical Modeling of Asymmetric Molecular Line Profiles

Poster Presentation: 4^th Cologn-Bonn-Zermatt Sumposium. Zermatt, Switzerland (September 2003)

Millimeter and Submillimeter Investigation of Triggered Star Formation

Contributed Talk: 196^th Meeting of the American Astronomical Society. Rochester, NY (May 2000)
Download: ADS

Collisional Quenching of OH Radio Emission from Comet Hale-Bopp

Poster Presentation: 29^th Meeting of the American Astronomical Society's Division of Planetary Science. Boston, MA (July 1997)
Download: ADS

The Rotation Axis of Mercury: A New Determination from Radar Observations

Poster Presentation: 185^th Meeting of the American Astronomical Society. Tucson, AZ (January 1995)
Download: ADS

PhD Thesis

Models and Observations of the Millimeter and Submillimeter Molecular Line Emission of Bright-Rimmed Clouds

Advisor: Gopal Narayanan

Abstract

We present the results of a comparison of new millimeter and submillimeter molecular line survey of bright-rimmed clouds, observed at FCRAO in the CO (J=1-0), C¹⁸O (J=1-0), HCO⁺ (J=1-0), H¹³CO⁺ (J=1-0), and N₂H⁺(J=1-0) transitions, at the HHT in the CO (J=2-1), HCO⁺ (J=3-2), HCO⁺ (J=4-3), H¹³CO⁺ (J=3-2), and H¹³CO⁺ (J=4-3), and at the CSO in the HCO⁺ (J=4-3) and H¹³CO⁺ (J=4-3) molecular line transitions with synthetic observations of a hydrodynamic shock driven triggered star formation model. We also present observations of three Bok globules done for comparison with the bright-rimmed clouds. We find that the appearance of the millimeter CO and HCO+ emission is dominated by the morphology of the shock front in the bright-rimmed clouds. The HCO⁺ (J=1-0) emission tends to trace the swept up gas ridge and overdense regions which may be triggered to collapse as a result of sequential star formation. The morphologies of the observed bright-rimmed cloud are in good agreement with the our modeled emission. Five of the seven bright-rimmed clouds we observe seem to have an outflow, however only one shows the spectral line blue-asymmetric signature that is indicative of infall, in the optically thick emission. We also present evidence that in bright-rimmed clouds the nearby shock front may heat the core from outside-in thereby washing out the normally observed line infall signatures seen in isolated star forming regions. We find that the derived core masses of these bright-rimmed clouds are similar to other low and intermediate mass star forming regions.

Download: Scribd

Comments

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