July 2002

Roger W. Rollins
Professor Emeritus of Physics
Department of Physics and Astronomy
Ohio University
Athens, Ohio 45701

ACADEMIC PREPARATION

Ph. D., January 1967, Applied Physics, Cornell University

B. S., June 1961, Engineering Science, Purdue University

PROFESSIONAL EXPERIENCE

Ohio University, Professor Emeritus of Physics, 2002-present.

Associate Dean, College of Arts and Sciences, Ohio University, Jan. 1997-June 2002.

Ohio University, Professor of Physics, 1978-2002.

Ohio University, Associate Professor, 1972-1978.

Visiting Scientist, Institute fur Experimental Kernphysik, Universitat Karlsruhe, Karlsruhe, West Germany, 1972-73.

Ohio University, Assistant Professor, 1966-1972.

AWARDS, PROFESSIONAL OFFICES HELD, AND MEMBERSHIPS

American Association of Physics Teachers Area Committee on Graduate Educatione, June 2001-January 2004.

Honorary Member Phi Beta Kappa (June 2001, Lambda of Ohio Chapter at Ohio University).

Fellow of the American Physical Society (Elected November 1999) APS Fellowship citation:

For his excellent research in chaos, superconductivity, and his outstanding contributions to educational and research software, and dedication and service to the APS through the Ohio Section.

Winner in the Computers in Physics Sixth Annual Software Contest. Awarded January 1996 for the program Bands which is one of the simulations in Solid State Physics Simulations: Consortium for Upper-level Physics Software by Johnson, Keeler, Rollins, and Spiklemire (Wiley, New York, 1996).

Ohio University Jeanette G. Grasselli Faculty Teaching Award, 1994.

Honorable Mention in the Computers in Physics Second Annual Software Contest. Awarded January 1992 for the program Chaotic Dynamics Workbench by R. W. Rollins, (Physics Academic Software, AIP, New York, 1990).

Served on the Executive Committee of the Ohio Section/American Physical Society, 1990-2000.

Elected Treasurer, Ohio Section/American Physical Society, 1991-93, 95-97,98-99.

Elected Assoc. Treasurer, Ohio Section/American Physical Society, 1990-91, 93-95, 97-98, 99-2000.

Elected Chair, Ohio University Faculty Senate, 1979-1980, 1980-81, and 1988-89.

Member American Physical Society.

Member American Association of Physics Teachers.

Member American Association for the Advancement of Science.

Member American Association of University Professors.

Member National Education Association.

Member Sigma Xi, the Scientific Research Society.

Member Sigma Pi Sigma, the Physics Honor Society.

Member Tau Beta Pi, the Engineering Honor Society

TEACHING EXPERIENCE

Introductory Physics (non-calculus).

General Physics (with calculus).

Undergraduate Thermodynamics and Statistical Physics.

Undergraduate and Graduate Solid State Physics.

Undergraduate and Graduate Classical Mechanics.

Introductory and Advanced Undergraduate Laboratories.

Graduate Seminar courses on Nonlinear Dynamics and Chaos.

Participated in several NFS Summer Institutes for High School Students.

RESEARCH INTERESTS

Nonlinear dynamics and chaotic behavior in physical systems, Computational Physics, Experimental Condensed Matter Physics-Superconductivity.

RESEARCH SUPPORT

Ohio University Research Committee Grant OUR 225, ``Experimental Study of the Superconducting Properties of Niobium Tantalum Alloys,'' 1967-68, $3,000.

Air Force Office of Scientific Research, Physics Division, Grant No. 75-2807, ``Studies of Magnetic Flux and Critical Current Distributions Near the Surface in Type II Superconductors,'' 1975-1978, $81,079.

Ohio University Research Committee Grant OUR 686, ``A Study of the Physical Characteristics of Nonlinear Systems which are Important in Predicting Chaotic Behavior,'' with Earle R. Hunt, 1983-84, $3,900.

Ohio Supercomputer Center Grant, ``Modeling and Analysis of Nonlinear Chaotic Systems,'' 1989-1991, 10 Resource Units on Cray X/MP.

Ohio University Research Challenge Grant RC88-41, ``Application of Nonlinear Dynamics and Chaos to an Atomistic Model of Fracture,'' 1988-89, $7,500.

Electric Power Research Institute (EPRI) Contract RP2426-25, ``Application of Nonlinear Dynamics to Utilities-related Materials Problems,'' subcontract funded through Battelle Memorial Institute, Columbus Division: 1990-91, $24,139; 1992-93, $45,080; 1993-95, $86,106; and subcontract funded through Ohio State University Research Foundation: 1995-97, $131,917; and 1998-99, $58,220.

SUPPORT FOR TEACHING AND SCHOLARSHIP

Member of the Consortium for Upper-level Physics Software (CUPS) project funded by National Science Foundation Grant No. PHY-9014548, 1990-94. A large collaboration supported by NSF to develop computer simulation software and supplementary texts for use in nine upper-level undergraduate physics courses. Project directors: Robert Ehrlich and Maria Dworzecka of George Mason University and William MacDonald of the University of Maryland.

National Science Foundation Grant No. DUE-9250594, Computational Physics Laboratory, Roger W. Rollins and Sergio E. Ulloa, Sept. 1992-Aug. 1995, $30,153.

INVITED TALKS AT PROFESSIONAL MEETINGS

Two-Dimensional Aspects of the Diode Resonator from Experimental Data and Model Calculations, Delivered by E. R. Hunt. Presented at the NATO Advanced Study Workshop on Testing Nonlinear Dynamics, Haverford College, Haverford, PA, June 6-9, 1983.

Organized Chaos: Universality in Deterministic Chaos and its Patterns. (with computer simulations) Presented at the Spring Meeting of the Ohio Section of the American Physical Society, Akron, Ohio, May 1, 1987. Abstract: Bull. Am. Phys. Soc., 32, 2160 (1987).

Organized Chaos: An Introduction to Deterministic Chaos, presented at the Summer Meeting of the American Association of Physics Teachers, Minneapolis, MN, June 29, 1990. Abstract: AAPT announcer, 20(2), 79 (1990).

Basic Chaos: an introduction for teachers, presented at the Spring Meeting of the Southern Ohio Section of the American Association of Physics Teachers, Cincinnati, OH, October 13, 1990.

Deterministic Chaos, with demonstrations, presented at the 1991 Joint Spring Meeting of the Ohio Section/APS and the Appalachian and Southern Ohio Sections/AAPT, Ohio University, Athens, OH, April 20, 1991.

Exploring Chaotic Dynamics with Interactive Computer Simulations, presented at Physics Computing '91 Conference, San Jose, Convention Center, June 12, 1991.

Recursive Proportional Feedback and its use to Control Chaos in an Electrochemical System, presented at the 2nd Experimental Chaos Conference, Arlington, VA, Oct 6-8, 1993.

Deterministic Chaos: Unpredictable yet Controllable, presented at the Indiana Section of the AAPT meeting, Rose-Hulman Inst. of Tech., Terre Houte, IN, April 16, 1994.

Chaotic and Unpredictable, Yet Controllable, presented in the afternoon session, SUNY Conversations in the Disciplines, ``Chaos and Non-linearity: An Interdisciplinary Approach to Research Applications in Biology, Engineering, and Physics'', SUNY Geneseo, Geneseo, NY, April 22, 1995.

Controlling Chaos, presented at a mini-workshop ``Nonlinear Dynamics: Moving Toward Applications'', held at University of West Virginia, (organized by Kenneth Showalter, Chemistry and Mark Koepke, Physics), Morgantown, WV, April 28, 1995.

A CUPS Simulation on Energy Bands, Gaps, and Eigenfunctions in an Infinite Lattice, presented at an Invited Session on the Winners of CIP's Fifth Annual Software Contest, AAPT 1996 Winter Meeting, Reno, Nevada, 15 January, 1996. Abstract: AAPT Announcer, 25, 50 (1995).

Co-presentation with Ronald Stoner, Using Computer Simulation to Visualize Physics Concepts: The CUPS Project, presented at Ohio Section/APS Fall 97 Meeting held at Miami University, Oxford, Ohio, October 10-11, 1997. Abstract: to appear in Bull. Am. Phys. Soc.

INVITED LECTURES and WORKSHOPS

Colloquium: On the Road to Chaos, presented at Miami University, Dept. of Physics, Oxford, OH, October 27, 1983.

Colloquium: Deterministic Chaos-with computer demonstrations, College of Engineering and Technology Colloquium, Ohio University, February 4, 1985.

Colloquium: What is Deterministic Chaos?-with demonstrations, presented at Hiram College, Hiram, OH, November 14, 1985.

Lecture: Thirty Minutes of Chaos, Sigma Xi Luncheon presentation, Ohio University, Athens, OH, April 23, 1986.

Colloquium: Order and Chaos, presented at the College of Wooster, Wooster, OH, April 29, 1986.

Lecture: Organized Chaos-the nature of chaos and its patterns, lecture and demonstrations presented at the Ninth Annual Alumni College, Ohio University, Athens, OH, July 18, 1986.

Colloquium: Universality in Deterministic Chaos-with computer simulations, Physics Colloquium delivered at The University of Louisville, Louisville, KY, April 10, 1987.

Colloquium: Deterministic Chaos-with animated computer simulations, Physics Colloquium, The College of Wooster, Wooster, OH, March 31, 1988.

Colloquium: The Physics of Chaos, Physics Department Colloquium, Miami University, Oxford, Ohio, December 6, 1989.

Workshop: Chaotic Dynamics Workbench, invited workshop leader, Joint Winter Meeting of the American Association of Physics Teachers and the American Physical Society, Atlanta, Georgia, January 21, 1990. Abstract: AAPT announcer, 19, 30 (1989).

Workshop: Chaotic Dynamics Workbench, invited workshop leader at the Summer Meeting of the American Association of Physics Teachers, Minneapolis, MN, June 25, 1990. Abstract: AAPT announcer, 20(2), 40 (1990).

Colloquium: Fifty minutes of Chaos - with demonstrations, Physics Colloquium delivered at Marshall University, Huntington, WV, December 7, 1990.

Workshop: Teaching Chaos Using Computers with Software from Physics Academic Software, invited co-leader, January AAPT/APS Joint Winter Meeting, San Antonio, TX, Jan. 20, 1990, Abstract: AAPT announcer, 20(4), 35 (1990).

Workshop: Teaching Chaos Using Computers with Software from Physics Academic Software, invited co-leader, presented at the Annual Summer meeting of the American Association of Physics Teachers, Vancouver, B.C., Canada, June 24, 1991, Abstract: AAPT announcer, 21(2), 34, (1991).

Colloquium: Using Computers in Conceptualizing Physics -- the Next Frontier in Teaching, Physics Colloquium, Ohio University, Athens, OH, October 25, 1991.

Colloquium: Recent Developments in Chaos, Physics Colloquium, Bowling Green University, Bowling Green, OH, Feb. 26, 1992.

Seminar: Fifty minutes of Chaos - with demonstrations, Undergraduate Physics Seminar, Denison University, Granville, OH, March 30, 1992.

Workshop: Teaching Chaos Using Computers with Software from Physics Academic Software, invited co-leader at the Annual Summer meeting of the AAPT, Orono, ME, Aug. 10, 1992. Abstract: AAPT Announcer, 22, 36, (1992).

Colloquium: Deterministic Chaos and its Control, Department of Physics and Applied Optics, Rose-Hulman Institute of Technology, Terre Haute, IN, May 11, 1993.

Colloquium: Chaos: Unpredictable yet Controllable (with demonstrations, Department of Physics and Astronomy, Ball State University, Muncie, IN, Sept. 22, 1994.

Colloquium: Integrating Computers into the Physics Curriculum: the CUPS project, Department of Physics and Physical Science, Marshall University, Huntington, WV, April 7, 1995.

Colloquium: Chaotic and Unpredictable, yet Controllable (with demonstrations), Department of Physics and Astronomy, Butler University, Indianapolis, IN, April 9, 1997.

PUBLISHED SOFTWARE

R. W. Rollins, The Ohio University Chaotic Dynamics Workbench Sampler, Disks #12 and #13 of a collection of software programs selected from the Conference on Computers in Physics Instruction, (CIP Conference, Department of Physics, North Carolina State University, Raleigh, NC 27695-8202), 1988.

R. W. Rollins, Chaotic Dynamics Workbench, program, demonstration/data diskettes, and Manual (86 pgs.), Physics Academic Software, American Institute of Physics, NY, 1990. Received Honorable Mention in the Second Computers in Physics educational software contest; awarded in 1992.

I. Johnston, G. Keeler, R. Rollins, and S. Spiklemire, Solid State Physics Simulations: the Consortium for Upper-level Physics Software, (Wiley, New York, 1996) (pbk./disk). The program BANDS by R. Rollins, included in this package, was an Award Winner in the Sixth Computers in Physics educational software contest, awarded in January 1996.

PUBLICATIONS

• D. Walton, T. N. Rhodin, and R. W. Rollins, Nucleation of Silver on Sodium Chloride, J. Chem. Phys. 38, 2698 (1963).
• J. Silcox and R. W. Rollins, Hysteresis in Hard Superconductors, Appl. Phys. Letters, 2, 231 (1963).
• J. Silcox and R. W. Rollins, Hysteresis in Hard Superconductors, Rev. Mod. Phys., 36, 52, (1964).
• R. W. Rollins and J. Silcox, Effect of Surface conditions on AC Transitions in Type II Superconductors, Proc. Conf. Phys. Type II Superconductivity, Western Reserve University, 111-132, (1964).
• M. R. Beasley, W. A. Fietz, R. W. Rollins, J. Silcox, and W. W. Webb, Annihilation Instability in Hard Superconductors, Phys. Rev., 137, A1205 (1965).
• J. Silcox and R. W. Rollins, Low Frequency Losses and Critical Currents in the Superconducting Surface Sheath, Solid State Comm., 4, 323 (1966).
• R. W. Rollins and J. Silcox, Surface Instabilities in Type II Superconductors, Phys. Letters, 23, 531 (1966).
• R. W. Rollins and J. Silcox, The Nature of the AC Transition in the Superconducting Surface Sheath in Pb-2% In, Phys. Rev. 155, 404 (1967).
• C. W. Smith, E. R. Sanford, and R. W. Rollins, Measurements of and it Ta-Nb Alloys, Phys. Letters, 27A, 362 (1968).
• R. W. Rollins, R. L. Cappelletti, and J. F. Fearday, Anomalous Near in Pb-In and Critical Phenomena in the Superconducting Sheath, Phys. Rev., B2, 105 (1970).
• R. W. Rollins and Lavern C. Clune, Specific Heat and Magnetic Measurements in Superconducting Ta-Nb Alloys, Phys. Rev. B6, 2609 (1972).
• J. F. Wagner and R. W. Rollins, Dynamics of Flux Motion and AC Losses in the Superconducting Sheath State, J. Appl. Phys., 44, 1778 (1973).
• J. H. Fearday and R. W. Rollins, Magnetic Measurements on Strong-Coupling
  and PbIn Superconducting Alloys, Phys. Rev., B8, 162 (1973).
• R. W. Rollins, H. Kupfer, and W. Gey, Magnetic Field Profiles in Type II Superconductors with Pinning Using a New AC Technique, J.\ Appl.\ Phys., 45, 5392 (1974).
• R. W. Rollins, H. Kupfer, and W. Gey, The Flux Distribution in Type II Superconductors Investigated by a New Method, in ``Proceedings of the International Discussion on Flux Pinning in Superconductors,'' ed.\ by P. Haasen and H. C. Freyhardt, (Goltze-Druck, Gottingen, Germany, 1975) p. 142.
• R. W. Rollins and Y. Anjaneyulu, Position Dependent Flux Pinning by Proton Irradiation Damage in Thick Niobium Samples, J. Appl.\ Phys., 48, 1296 (1977).
• Y. Anjaneyulu and R. W. Rollins, Magnetic Flux Pinning in Proton Irradiated Thick Niobium Samples, J. Appl. Phys., 50, 410 (1979).
• R. W. Rollins and E. R. Hunt, Exactly Solvable Model of a Physical System Exhibiting Universal Chaotic Behavior, Phys. Rev.\ Lett., 49, 1295 (1982).
• E. R. Hunt and R. W. Rollins, Exactly Solvable Model of a Physical System Exhibiting Multidimensional Chaotic Behavior, Phys.\ Rev.\ A29, 1000 (1984).
• R. W. Rollins and E. R. Hunt, Intermittent Transient Chaos at Interior Crisis in the Diode Resonator, Phys. Rev., A29, 3327 (1984).
• Z. Su, R. W. Rollins, and E. R. Hunt, Measurements of Spectra of Attractors at Transitions to Chaos in Driven Diode Resonator Systems, Phys. Rev., A36, 3515 (1987).
• Alan J. Markworth, J. Kevin McCoy, and R. W. Rollins, Chaotic Dynamics in an Atomistic Model of Environmentally Assisted Fracture, J. Materials Res., 3, 675 (1988).
• Z. Su, R. W. Rollins, and E. R. Hunt, Universal properties at the onset of chaos in diode resonator systems, Phys. Rev. A 40, 2689 (1989).
• Z. Su, R. W. Rollins, and E. R. Hunt, Simulation and characterization of strange attractors in driven diode resonator systems, Phys. Rev. A 40, 2698 (1989).
• R. W. Rollins, Exploring Nonlinear Dynamics and Chaos Using an Interactive Program with Graphics Animation, in ``Computers in Physics Instruction, conference proceedings'', editors Edward F. Redish and John S. Risley, (Addison-Wesley, New York, 1989) p. 148.
• Z. Su, R. W. Rollins, and E. R. Hunt, Measurements of for multifractal attractors in driven diode resonator systems, in ``Measures of Complexity and Chaos,'' Proceedings of NATO Advanced Research Workshop edited by N. B.\ Abraham, A. M. Albano, A. Passamante and P. E. Rapp, (Plenum, NY, 1989) pg.\ 191.
• Sergio De Souza-Machado, R. W. Rollins, D. T. Jacobs, and J.\ L.\ Hartman, Studying Chaotic Systems Using Microcomputer Simulations and Lyapunov Exponents, Am. J. Physics, 58, 321 (1990). Note: This paper was listed as one of the More memorable papers published during the first 60 years of the AJP by Robert H. Romer, AJP Editor, Editorial: Sixty years of the ``American Journal of Physics'' - More memorable papers, Am. J. Physics, 61, 103 (1993).
• S. Mahajan, R. L. Cappelletti, R. W. Rollins, D. C.\ Ingrham, and J. A. Butcher, Jr., Properties of Laser Ablated Superconducting Films of Y-Ba-Cu-O, in ``Superconductivity and its applications'' ed. by Yi-Han Kao, Philip Coppens, and Hoi-Sing Kwok, American Institute of Physics, NY, 1991, pg. 569.
• Roger W. Rollins, Book review (Prospectives of Nonlinear Dynamics, Vol. 1 by E. Atlee Jackson, Cambridge U. P., NY, 1989), Am.\ J. Physics, 59, 381, (1991).
• H. D. Dewald, P. Parmananda, and R. W. Rollins, Periodic Current Oscillations in the Anodic Dissolution of Copper in Acetate Buffer, J. Electroanal. Chem., 306, 297 (1991).
• Alan Markworth, J. Kevin McCoy, P. Parmananda, and R. W.\ Rollins, A Quantitative Assessment of Three Metal-Passivation Models Based on Linear Stability Theory and Bifurcation Analysis, Chapter 12 of `` Applied Chaos'', Jong Hyun Kim and John Stringer Eds., Wiley, N. Y. 1992, pp 277-296
• Sukesh Mahajan, R. L. Cappelletti and R. W. Rollins, Orientation-dependent Vibrating Sample Magnetometry of Thin Films of , J. Appl. Phys. 71, pp. 1522-1524, (1992).
•   R. W. Rollins, P. Parmananda, and P. Sherard, Controlling chaos in highly dissipative systems: A simple recursive algorithm, Phys. Rev. E, 47, R780-R783, 1993.
•   P. Parmananda, P. Sherard, R. W. Rollins, and H. D. Dewald, Control of chaos in an electrochemical cell, Phys. Rev.\ E, 47, R3003-R3006, 1993.
•   Howard D. Dewald, Punit Parmananda, and R. W. Rollins. Periodic and Chaotic Oscillations at a copper electrode in an acetate electrolyte, J. Electrochem. Soc., 140, 1969, (1993).
•   J. Kevin McCoy, Punit Parmananda, R. W. Rollins, and Alan Markworth, Chaotic dynamics in a model of metal passivation, J. Mater. Res., 8, 1858-1865, (1993).
• P. Parmananda, H. Dewald, and R. W. Rollins, Mixed-Mode Oscillations in the Electrodissolution of Copper in Acetic Acid/Acetate Buffer, Electrochimica Acta, 39, 917-920, (1994).
• R. Mohan, A. J. Markworth and R. W. Rollins, Effects of dissipation and driving on chaotic dynamics in an atomistic crack-tip model, Modelling Simul. Mater. Sci. Eng. 2, 659-676 (1994).
• M. A. Rhode, R. W. Rollins, and C. A. Vassiliadis, Adaptive Learning to Control Chaos, IEEE Proc. Twenty-sixth Southeastern Symposium on System Theory, pp. 638-642 (IEEE Computer Soc. Press, Los Alamitos, CA, 1994)
• P. Parmananda, M. A. Rhode, G. A. Johnson, R. W. Rollins, H. D. Dewald, and A. J. Markworth, Stabilization of unstable steady states in an electrochemical system using derivative control, Phys. Rev. E 49, 5007-5011 (1994).
• P. Parmananda, R. W. Rollins, P. Sherard, and H. Dewald, Recursive proportional-feedback and its use to control chaos in an electrochemical cell, in ``Proceedings of the 2nd Conference on EXPERIMENTAL CHAOS'' ed.\ by W. Ditto, L. Pecora, S. Vohra, M. Shlesinger, and M. Spano, (World Scientific Press, River Ridge, NJ, 1995) pp 304-316.
• John Stringer, Alan J. Markworth, and Roger W. Rollins, Deterministic Chaos Theory and Its Applications in Materials Science, Materials Research Society Bulletin, 20, pp 20-28 (July 1995).
• M. A. Rhode, R. W. Rollins, A. J. Markworth, K. D. Edwards, K. Nguyen, C. S. Daw, and J. F. Thomas, Controlling Chaos in a Model of Thermal Pulse Combustion, J. Appl. Phys., 78, pp 2224-2232 (1995).
• M. A. Rhode, J. Thomas, R. W. Rollins, and A. J. Markworth, Automated adaptive recursive control of unstable orbits in high-dimensional chaotic systems, Phys. Rev. E, 54, pp 4880-4887, (1996).
•   M. A. Rhode, R. W. Rollins, and H. D. Dewald, On a simple recursive control algorithm automated and applied to an electrochemical experiment, CHAOS bf 7, pp 653-663, (1997). [An invited, reviewed contribution to a focus issue of CHAOS on ``Control and Synchronization of Chaos''.]
•   A. J. Markworth, A. Gupta and R. W. Rollins, Characterization and Control of Chaotic Stress Oscillations in a Model for the Portevin-Le Châtelier effect, Scripta Materialia, 39, pp 481-486, (1998).
•   Alan J. Markworth, James H. Saunders, Anthony M. Bloch, Roger W. Rollins, and Arnab Gupta, Control Strategies for the Improvement of Corrosion Resistance, Materials Science and Engineering, A270, pp 254-259, (1999).
•   Stephen Kariuki, Howard D. Dewald, Joseph Thomas, and Roger W. Rollins, Current oscillations of indium(III) at a dropping mercury electrode, accepted for publication (30 March 2000) in J. Electroanalytical Chem.
  

PRESENTATIONS AT MEETINGS

• J. Silcox, R. W. Rollins and W. W. Webb, Hysteresis Effects in Hard Superconductors, delivered at the conference on ``High Magnetic Fields, Their Production and Their Applications,'' Clarendon Laboratory, University of Oxford, 10-12 July, 1963.
• R. W. Rollins and J. Silcox, Effect of Surface Conditions on AC Field Transitions in Type II Superconductors, delivered at the conference on Type II Superconductivity, Western Reserve University, Cleveland, Ohio, June 1964.
• R. W. Rollins and J. Silcox, Critical Currents in the Superconducting Sheath of Pb-In Alloys as Measured by Low Frequency AC Field Penetration, Delivered at the 1966 meeting of the American Physical Society (APS) in Durham, North Carolina. Abstract: Bull. Am. Phys. Soc., 12, 224, (1966).
• R. W. Rollins, J. Gosselin, and J. Silcox, Critical Currents in the Superconducting Surface Sheath, Delivered at the 1967 meeting of the APS in New York.
• C. W. Smith, E. R. Sanford, and R. W. Rollins, The Temperature Dependence of the Magnetic Properties of Superconducting Tantalum and Tantalum-Niobium Alloys, Delivered at the 1968 meeting of the APS in New York. Abstract: Bull. Am. Phys. Soc. 14, 129 (1969).
• J. H. Fearday, R. W. Rollins, and R. L. Cappelletti, Anomalous Near in Pb-In Critical Phenomena in the Superconducting Surface Sheath, Delivered at the Fall meeting of the Ohio Section of the APS in Columbus, OH, October 1969. Abstract: Bull. Am. Phys. Soc., 15, 125 (1970).
• L. C. Clune and R. W. Rollins, Normal State Specific Heats and Critical Temperatures of Ta-Nb Alloys, delivered at the annual meeting of the APS in Chicago, IL, 1970. Abstract: Bull. Am. Phys. Soc., 15, 39 (1970).
• J. F. Wagner and R. W. Rollins, On the Dynamics of Flux Motion and AC Losses in the Superconducting Sheath State, delivered at the annual meeting of the APS in New York, 1971. Abstract: Bull. Am. Phys. Soc., 16, 121 (1971).
• J. H. Fearday and R. W. Rollins, Measurements of for some strong coupling alloys, delivered at the Spring Meeting of the APS in Washington, D.C., April 26-29, 1971. Abstract: Bull. Am. Phys. Soc., 16, 498 (1971).
• R. W. Rollins, Heinz Kupfer, and Wolfgang Gey, Magnetic Field Profiles in Type II Superconductors with Pinning Using a New AC Technique, delivered at the annual meeting of the APS in Chicago, IL, 1973. Abstract: Bull. Am. Phys. Soc., 19, 77 (1974).
• R. W. Rollins, Heinz Kupfer, and Wolfgang Gey, Flux Distributions in Type II Superconductors Investigated by a New Method, delivered at the International Discussion Meeting on Flux Pinning in Superconductors held in St Andreasburg, West Germany, September 23-26, 1974.
• Y. Anjaneyulu and R. W. Rollins, Measurements of Magnetic Flux Pinning Near the Surface in Proton-Irradiated Niobium, delivered at the March meeting of the APS in Atlanta, GA, 1976. Abstract: Bull. Am. Phys. Soc., 21, 341 (1976).
• R. W. Rollins and Y. Anjaneyulu, Temperature and Magnetic Field Dependence of the Flux Pinning Profile in Proton-Irradiated Thick Nb Samples, delivered at the Annual Fall Meeting of TMS-AIME, Niagara Falls, New York, September 20-23, 1976.
• Y. Anjaneyulu and R. W. Rollins, Flux Pinning and Dislocation Loops Observed in Proton-Irradiated Niobium, delivered at the Washington, D.C. meeting of the APS, March 27-30, 1978. Abstract: Bull. Am. Phys. Soc., 23, 322 (1978).
• R. W. Rollins and K. Koh, Flux Line Lattice Defect Mechanism for Magnetic Flux Pinning in Type II Superconductors, delivered at the annual meeting of the APS in Chicago, IL, 1980. Abstract: Bull. Am. Phys. Soc., 25, (1980).
• R. W. Rollins, Y. Anjaneyulu, and K. Koh, Flux Pinning in the Superconducting Mixed State of Proton Irradiated Nb, delivered at the Fall Meeting of the Ohio Section of the APS, Ohio University, Athens, OH, October 1983. Abstract: Bull. Am. Phys. Soc., 26, (1981).
• Brian Stout, R. W. Rollins, and E. R. Hunt, The Observation of Period Doubling and Chaotic Behavior in a Dripping Water Experiment, delivered at the Ohio Section of the APS at Miami University, Oxford, OH, October 1983. Abstract: Bull. Am. Phys. Soc., 29, 908 (1984).
• R. W. Rollins, Software for Nonlinear Differential Equations Demonstrating Chaos, delivered at the Appalachian Section of the AAPT meeting at Ohio University, Athens, OH, October 25, 1985.
• Kevin Yaussy, R. W. Rollins, and E. R. Hunt, Numerical Evidence for Fractal Basin Boundaries for the Duffing Oscillator, delivered at the 1985 annual meeting of the Indiana Academy of Science.
• Z. Su, R. W. Rollins, and E. R. Hunt, A Fast Algorithm for Calculating Fractal Dimensions, delivered at the 1986 Joint APS/AAPT meeting in Atlanta, GA, January 1986. Abstract: Bull. Am. Phys. Soc., 31, 46 (1986).
• Kevin Yaussy, R. W. Rollins, and E. R. Hunt, Numerical Evidence for Fractal Basin Boundaries for Non-chaotic Attractors in a Duffing Oscillator, delivered at the 1986 Joint APS/AAPT meeting in Atlanta, GA, January 1986. Abstract: Bull. Am. Phys. Soc., 31, 46 (1986).
• Z. Su, R. W. Rollins, and E. R. Hunt, Universality at the Transition from Quasiperiodicity to Chaos in the Coupled Diode Resonator System, delivered at the 1987 Spring meeting of the Ohio Section of the APS in Akron, OH, May 1987. Abstract: Bull. Am. Phys. Soc., 32, 2160 (1987).
• S. De Souza-Machado, R. W. Rollins, J. L. Hartman and D. J. Jacobs, Results of a Computer Simulation Study of Chaotic Dissipative Systems, delivered at the Ohio Section Meeting of the APS in Columbus, April 16, 1988. Abstract: Bull. Am. Phys. Soc., 33, (1988).
• R. W. Rollins, Exploring Nonlinear Dynamics and Chaos Using an Interactive Program with Graphics Animation, delivered at The Conference on Computers in Physics Instruction, North Carolina State University, Raleigh, NC, August 1-5, 1988.
• Z. Su, R. W. Rollins, and E. R. Hunt, Measurements of for Multifractal Attractors in Driven Diode Resonator Systems, paper presented at ``The International Workshop on Quantitative Measures of Dynamical Complexity in Nonlinear Systems,'' Bryn Mawr, Pennsylvania, June 22-24, 1989.
• R. W. Rollins, Using a highly interactive micro-computer program to study chaotic systems modeled by ODE's, delivered at ``Dynamics Days,'' Austin, Texas, January 3-6, 1990.
• S. Mahajan, R. L. Cappelletti, R. W. Rollins, D. C. Ingram, and J. A. Butcher Jr., Properties of laser ablated superconducting films of Y-Ba-Cu-O, delivered at the Fourth Annual Conference on Superconductivity and its Application, Buffalo, NY, September 18-22, 1990.
• Alan Markworth, Kevin McCoy, Punit Parmananda and R. W. Rollins, A Quantitative Assessment of Three Metal-Passivation Models Based on Linear Stability Theory and Bifurcation Analysis, delivered at Workshop on Applications of Chaos, San Francisco, California, December 4-7, 1990.
• P. Parmananda and R. W. Rollins, (Ohio University) and J.\ Kevin McCoy and Alan J. Markworth (Battelle-Columbus), Application of Linear Stability Analysis and Numerical Integration to Kinetic Equations Modeling Metal Passivation, presented in Poster Session, ``Dynamics Days,'' Houston, TX, January 6-9, 1991.
• D. M. Weekley and R. W. Rollins, Transient Times and Tangled Basin Boundaries in a Duffing Oscillator, presented in Poster Session, ``Dynamics Days,'' Houston, TX, January 6-9, 1991.
• P. Parmananda, H. Dewald and R. W. Rollins, (Ohio University) and J. Kevin McCoy and Alan J. Markworth, (Battelle-Columbus), Chaotic Dynamics Found in Kinetic Equations Modeling Metal Passivation, delivered at the March Meeting of the American Physical Society, Cincinnati, OH, March 18-22, 1991. Abstract: Bull. Am. Phys. Soc., 36, 920 (1991).
• D. M. Weekley and R. W. Rollins, Tangled Basin Boundaries in a Duffing Oscillator, delivered at the March Meeting of the American Physical Society, Cincinnati, OH, March 18-22, 1991. Abstract: Bull. Am.\ Phys. Soc., 36, 920 (1991).
• Sukesh Mahajan, R. L. Cappelletti and R. W. Rollins, Orientation-Dependent Magnetic Properties of Epitaxial Thin Films of , delivered at the March Meeting of the American Physical Society, Cincinnati, OH, March 18-22, 1991. Abstract: Bull. Am. Phys. Soc., 36, 1030 (1991).
• Sukesh Mahajan, R. L. Cappelletti and R. W. Rollins, Orientation-dependent vibrating sample magnetrometry studies on thin films of YBaCuO, delivered at the Spring Meeting of the Ohio Section of the American Physical Society, Athens, OH, April, 1991.
• R. W. Rollins, Using the Chaotic Dynamics Workbench to Explore Chaos, delivered at Computational Physics in the Undergraduate Curriculum Conference, Davidson College, Davidson, NC, Oct. 2-5, 1991.
• R. W. Rollins, Forced Motion of a Wave Packet in a Crystal Lattice, delivered at Computational Physics in the Undergraduate Curriculum Conference, Davidson College, Davidson, NC, Oct. 2-5, 1991.
• P. Parmananda, H. Dewald and R. W. Rollins, Periodic and Chaotic Oscillations Found During Anodic Dissolution of Copper in an Acetate Buffer, presented in Poster Session, ``Dynamics Days,'' Austin, Texas, January 8-11, 1992.
• Howard D. Dewald, Punit Parmananda, and Roger W. Rollins, Periodic and Chaotic Oscillations at a Copper Rotating Disc and Rotating Ring Electrode, delivered at PittCon '92, New Orleans, LA, March 9-12, 1992.
• P. Parmananda, H. Dewald, and R. W. Rollins, Periodic and Chaotic Oscillations at a Copper Electrode, delivered at the March Meeting of the APS, Indianapolis, IN, March 16-20, 1992. Abstract: Bull. Am.\ Phys. Soc., 37, 69 (1992).
• S. Mahajan, R. L. Cappelletti, and R. W. Rollins, Flux Creep in Laser Ablated thin Films of YBaCuO., delivered at the March Meeting of the American Physical Society, Indianapolis, IN, March 16-20, 1992. Abstract: Bull. Am. Phys. Soc., 37, 118 (1992).
• R. W. Rollins, The Dynamics of a Forced Wave Packet in a Crystal Lattice-A CUPS Simulation for Solid State, invited presentation in a special session on the CUPS project at the Summer AAPT meeting, Orono, ME, August 10-15, 1992. Abstract: AAPT Announcer, 22, 73 (1992).
• P. Parmananda, H. Dewald, and R. W. Rollins, Mixed Mode Oscillations Found During Anodic Dissolution of Copper in an Acetate Electrolyte, presented in Poster Session, at Conference on Measures of Complexity and Chaos II, Bryn Mawr College, Bryn Mawr, PA, Aug. 13-15, 1992.
• P. Sherard, P. Parmananda, and R. W. Rollins, Controlling Chemical Chaos from the Time Series of a Single Variable in a Model of Metal Passivation, presented in Poster Session, at Conference on Measures of Complexity and Chaos II, Bryn Mawr College, Bryn Mawr, PA, Aug. 13-15, 1992.
•   R. W. Rollins, P. Parmananda, P. Sherard, and H. D. Dewald, Controlling chaos in highly dissipative systems, Twelfth Annual International Conference-Dynamics Days, Tempe, AZ, January 6-9, 1993.
•   P. Parmananda, P. Sherard, H. D.\ Dewald, and R. W. Rollins, Experimental control of chaos in an electrochemical cell, Twelfth Annual International Conference-Dynamics Days, Tempe, AZ, January 6-9, 1993.
•   H. D. Dewald, P. Parmananda, P. Sherard, and R. W. Rollins, Control of chaos in an electrochemical cell, 1993 International Electroanalytical Symposium (IES), Indianapolis, IN, May 19-21, 1993.
• R. W. Rollins, Motion of a Forced Wave Packet in a Crystal Lattice, delivered in session on computers in education, Physics Computing '93 Conference, 13 May--4 June 1993, Albuquerque, New Mexico; Abstract: Bull. Am. Phys. Soc., 38, 1446, (1993).
• M. A. Rhode, R. W. Rollins, and Alan Markworth, Derivative Control of the Steady State in a Numerical Model of Metal Passivation, International Conference on Dynamical Systems and Chaos, Tokyo Metropolitan University, Tokyo, JAPAN, May 23-27, 1994.
• Howard D. Dewald, Punit Parmananda, A. Rhode, G. A. Johnson, R. W. Rollins, and Alan J. Markworth, Control of Chaos and Stabilization of the Steady State in an Electrochemical System, delivered at the Twenty-First Annual Conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Cervantes Convention Center, St. Louis, Missouri, Oct. 2-7, 1994.
• M. A. Rhode, R. W. Rollins, A. J. Markworth, K. D. Edwards, K. Nguyen, C. S. Daw, and J. F. Thomas, Controlling Chaos in a Model of Thermal Pulse Combustion, presented at the 14-th Annual International Dynamics Days Texas, Houston, TX, January 4-7, 1995.
• C. S. Daw, J. F. Thomas, M. A. Rhode, R. W. Rollins, A. J. Markworth, Controlling Cycle-by-cycle Variation in a Pulse Combustor, presented at the Combustion Institute Meeting, San Antonio, TX, April, 1995.
• M. A. Rhode, J. Thomas, R. W. Rollins, and A. Markworth, Adaptive Recursive Control of Unstable Orbits in Higher Dimensional Chaotic Systems--Realistic Simulations, presented at the 3rd Experimental Chaos Conference, Heriot-Watt University, Edinburgh, Scotland, UK, August 21-23, 1995.
• M. Andreas Rhode, Joseph Thomas, R. W. Rollins, Adaptive Recursive Control and Tracking Applied to Hyperchaotic Rossler System, present at the March Meeting of the APS, St. Louis, MO, 18-22 March 1996. Abstract: Bull. Am. Phys. Soc., 41, 598, (1996).
• Esmail Badran, Sergio E. Ulloa, and R. W. Rollins, Classical dynamics and magnetotransport in a two-dimensional magnetic field modulation, presented at the Spring 1996 Meeting of the Ohio Section/APS, Columbus, OH, 12-13 April, (1996).
• M. A. Rhode, J. Thomas, R. W. Rollins, and H. D. Dewald, An automated adaptive learning algorithm used to control chaos in an electrochemical cell, presented at the 1996 Fall Meeting of the Ohio Section/APS, Ohio University, Athens, OH, 1-2 Nov. 1996. Abstract: to appear in Bull. Am. Phys. Soc.
• J. Thomas, M. A. Rhode, and R. W. Rollins, Chaos in an impact oscillator constructed form undergraduate laboratory equipment, presented at the 1996 Fall Meeting of the Ohio Section/APS, Ohio University, Athens, OH, 1-2 Nov. 1996. Abstract: to appear in Bull. Am. Phys. Soc.
• Esmail Badran, Sergio E. Ulloa, and R. W. Rollins, Classical dynamics and magnetotransport in a two-dimensional magnetic field modulation, presented at the 1996 Fall Meeting of the Ohio Section/APS, Ohio University, Athens, OH, 1-2 Nov. (1996).
• J. Thomas, M. A. Rhode, and R. W. Rollins, Chaos in an impact oscillator: experiment, simulation, and control, presented at Dynamics Days Arizona, 16-th Annual International Conference, Scottsdale, AZ, January 8-11, 1997.
• M. A. Rhode, J. Thomas, H. Dewald, and R. W. Rollins, Controlling chaos in an electrochemical cell using a learning algorithm, presented at Dynamics Days Arizona, 16-th Annual International Conference, Scottsdale, AZ, January 8-11, 1997.
•   M. A. Rhode, J. Thomas, H. D. Dewald, and R. W. Rollins, Bifurcation Analysis and Control Applied to an Experiment on Electrodissolution., presented at the 4-th Experimental Chaos Conference, Boca Raton, FL, August 6-8, 1997.
•   Stephen Kariuki, Howard D. Dewald, Joseph Thomas, and Roger Rollins, Electrochemical Oscillations of Indium(III) in Nitrate and Cloride Solutions. delivered at the Twenty-Fourth Annual Conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Rhode Island Convention Center, Providence, Rhode Island, Oct. 26-30, 1997.
•   Alan J. Markworth, A. Gupta, R. W. Rollins Characterization and Control of Chaotic Stress Oscillations in a Model for Portevin-LeChâtelier effect delivered at the John Hirth Symposium on Materials, San Antonio, TX, February 1998.
•   Howard D. Dewald, Stephen Kariuki, M. Andreas Rhode, Joseph Thomas, and Roger Rollins, Electrochemical Oscillations of Copper Oxidation and Indium Ion Reductions delivered at the Twenty-Fifth Annual Conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Austin Convention Center, Austin, TX, Oct. 11-15, 1998.
•   Joseph Thomas and R. W. Rollins, Bifurcations and Control of Impact Oscillator Systems, delivered at Dynamics Days 1999, Georgia Institute of Technology, Atlanta, GA, January 6-9, 1999.
•   Joseph Thomas and R. W. Rollins, Complex behavior in impact oscillator systems, delivered at the 1999 Centennial meeting of the American Physical Society, Atlanta, GA, March 20-26, 1999. Abstract: Bulletin of the American Physical Society, 44, 1131 (1999).
•   Howard D. Dewald, M. Andreas Rhode, and Roger Rollins, Adaptive Control in Electrochemical Oscillations of Copper delivered at the Twenty-Eighth Annual Conference of the Federation of Analytical Chemistry and Spectroscopy Societies, Cobo Conference-Exhibition Center, Detroit MI, Oct. 7-12, 2001.

 
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