Curriculum Vitae - University of Toledo · Specifically, through electron paramagnetic resonance (EPR) technique established that under Ir-192 HDR source (0.38MeV average energy)

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Curriculum Vitae

Dr. Diana Shvydka Dept. of Radiation Oncology, University of Toledo Health Science Campus,

3000 Arlington Ave., Toledo OH 43614 phone: (419) 787-4712 (cell), (419)-383-5328 (work)

e-mail: [email protected]

RESEARCH INTERESTS

General Interests: Medical Physics, Device Physics

Specific interests: Thin-film radiation detectors; Materials and device characterization,

fabrication, and simulation; Radiation transport Monte Carlo

modeling; Comsol modeling

EMPLOYMENT RECORD

2009 – present Assistant Professor, Department of Radiation Oncology, University of

Toledo Health Science Campus, Toledo OH;

2006 – 2009 Postdoctoral Research Associate, Department of Radiation Oncology,

University of Toledo Health Science Campus, Toledo OH;

2004 – 2006 Research Assistant Professor, Department of Physics and Astronomy

University of Toledo, Toledo OH;

2002 – 2004 Postdoctoral Research Associate, Department of Physics and Astronomy


1999 – 2002 Intern at First Solar, LLC, Perrysburg OH;

1996 – 2002 Ph.D. Graduate Student, Department of Physics and Astronomy


1996 – 1997 Software Engineer, Toledo Transducers, Inc., Holland OH;

1992 – 1995 Research Engineer, Kiev State University, Kiev, Ukraine;

1992 – 1993 Physics Teacher, High School #10, Kiev, Ukraine.

PUBLICATIONS

Over 90 publications in refereed journals and conference proceedings; the list of

publications is attached.

EDUCATION

MS (Physics) 1992, Kiev State University, Kiev, Ukraine

Ph.D. in Physics 2002, University of Toledo, Toledo, OH

CERTIFICATION

Certified by the American Board of Radiology (ABR) in Therapeutic Medical Physics,

June 2015

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TEACHING EXPERIENCE

Developed a new interdisciplinary MS/PhD level course “Device Modeling: from

Photovoltaics to Medical Physics” covering the basics of popular software

packages and modeling approaches applicable to physics and engineering,

including medical physics, photovoltaics, and other structures and devices. Taught

for the first time in Summer of 2016.

Teach core courses of the CAMPEP-accredited graduate Medical Physics

program: MPHY-6120/8120 “Radiation Dosimetry I”, MPHY-6130/8130

“Radiation Dosimetry II”; co-teach MPHY-6160/8160 “Radiation Biology”,

contribute lectures to other courses

Supervise MS and PhD graduate students in Medical physics program

Serve on committees of graduate students of Medical physics program

Taught non-calculus-based introductory “General Physics” course PHYS-2070 for

undergraduate students; Department of Physics and Astronomy, University of

Toledo. Since all of the students had non-physics majors, the main goal of the

course was to present the concepts in a simple form, appreciated by the audience

Developed and taught course PHYS-4510/5510 “Physics of Condensed Matter”;

University of Toledo. The main goal of the course was to give a conceptual

overview of the most important physical phenomena and models in the modern

condensed matter science

Supervise REU students, research resulted in publications; Department of Physics

and Astronomy, University of Toledo.

Partially supervised graduate students of PV group in the Department of Physics


Taught instructional labs as Graduate teaching assistant, Department of Physics


Taught physics (grade 7 through 9), High School #10, Kiev, Ukraine.

RESEARCH SUMMARY

MULTILAYER RADIATION DETECTORS FOR MEDICAL APPLICATIONS

Proposed a novel approach to design of radiation detectors, where multiple thin-film

devices are combined into a mechanical stack, providing signal reading from each layer.

The resultant noisy signals from each layer are processed together using regularization

techniques, thus allowing for restoration of the image or source spectrum. Small thickness

of individual layers helps avoiding charge trapping, and permits use of the detector

without external biasing.

THIN FILM CDTE RADIATION DETECTORS FOR MEDICAL APPLICATIONS

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Proposed a concept and design of new generation radiation detector for radiation

oncology applications, utilizing thin-film CdTe. Established superior radiation hardness

of these devices and developed their theoretical models using two most popular high-

energy radiation transport simulation software packages, BEAMnrc and MCNP5.

Provisional patent for the design has been filed.

GROWTH OF METAL WHISKERS UNDER CHARGED PARTICLE BEAMS

For the first time observed accelerated metal whiskers (MWs) growth in thin film tin (Sn)

samples on glass substrates irradiated under 6MV electron beam of medical accelerator.

MWs are hair-like protrusions that can unpredictably grow on surfaces of many

technologically important metals, for example, tin and zinc. MWs growing across electric

contacts cause shorts resulting in catastrophic failure of equipment, ranging from satellite,

automotive, and particle accelerator components to medical devices (e.g., defibrillators

and pacemakers). The observed accelerated whisker growth is attributed to electrostatic

effects due to charges trapped in an insulating substrate. A collaborative effort is

underway aiming at controllably stimulating MW growth. This is being achieved through

induction of strong electric fields in the direction perpendicular to the film surface. These

results shed light on physics of MW, and offer promise for establishing whisker-related

accelerated life testing protocols.

THERMO-BRACHYRATHERAPY IMPLANT SEED

Developed COMSOL Multiphysics model to study thermal distributions for newly

designed thermo-brachyratherapy implant for concurrent administration of radiation and

hyperthermia treatments of cancer. The ferromagnetic core (for example, Cu-Ni alloy) of

each implant produces heat when subjected to alternating electro-magnetic (EM) field and

effectively shuts off after reaching its Curie temperature thus realizing the temperature

self-regulation. Modeling of a problem where multiple seeds are arranged in a pattern

typical of a brachytherapy treatment allows finding a range of optimal parameters for seed

internal geometry and external magnetic field. Determined via Monte Carlo modeling that

combining thermal and radiation properties does not significantly alter the dosimetric

properties of the implant loaded with radioactive materials such as iodine (125I) or

palladium (103Pd).

NANOPARTICLE-AIDED RADIATION THERAPY

For the first time put forward a hypothesis and provided experimental evidence in support

of the idea that surfaces of gold (Au) and platinum (Pt) nanoparticles in aqueous media

become a source of hydroxyl and other free radicals when irradiated with high-energy

photons. Specifically, through electron paramagnetic resonance (EPR) technique

established that under Ir-192 HDR source (0.38MeV average energy) radical generation

in the vicinity of Au and Pt surfaces in water is significantly higher (by about a factor of

2) than can be accounted for by enhancement in dose deposition at the interface; the latter

modeled with MCNP. The result was observed for Au and Pt wires with diameter in nm

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range, but not for thicker wires, pointing toward the importance of the surface-to-volume

ratio parameter of the high-Z material, thus leading to the highest effect for nano-

particles. This revised model of the nanoparticle-aided radiation therapy makes the

modality potentially promising even at high energies of therapeutic photon sources.

PHYSICS OF THIN FILMS/DEVICES

Thin film device fabrication

Fabricated compound semiconductor thin films and solar cell devices using rf-sputtering

and pulsed laser deposition techniques. Samples of intentionally varied properties were

used for electrical and optical studies aimed at optimization of complete PV device

performance.

AFM/STM studies

Established the phenomenon of temporal chaos in micro-scale current-voltage

characteristics of thin-film devices: AFM current exhibits stochastic behavior in addition

to the spot-to-spot variation. This research illuminates the microscopic physics of electron

transport through thin-film and nano-particle barriers.

Shunting and dielectric breakdown

This ongoing effort is aimed at understanding the nature of dielectric breakdown in the

modern nano-scale devices (MOS transistors) and relating this phenomenon to the omni-

present shunting effects in thin-film photovoltaics. This resulted in two recent

publications in PRB and APL, and clearly has potential for more significant papers.

Piezo-photovoltaic coupling

Uncovered the phenomenon of piezo-photovoltaic coupling and related to the

morphology of the CdS film.

Nano-dipole photovoltaics

Developed new thin-film photovoltaic device principle, where the electric field is created

by a set of nanoparticles imbedded into a light-absorbing matrix. Utility patent

application has been filed.

Corrosion resistant protective tunneling layer

Recently filed a utility patent for a new principle of corrosion resistant electrode based on

the physical phenomenon of quantum tunneling rather than on the electrode chemistry.

Optical properties

Applied transmission-reflection and photoluminescence (PL) measurements to study the

near-band edge properties of CdSxTe1-x ternary system for films of different compositions

at room temperature and, at 10K; identified features related to defects and compositional

disorder. Systematically applied a below-band-gap PL excitation technique to elucidate

the effects of different steps in solar cell production.

Non-local photovoltaic response

Found the effect of non-local photovoltaic response to a scanning laser beam in

CdTe/CdS solar cells. The degree of non-locality depends on the device lateral resistance

and laser beam power, and can be as long as 1 meter in finished devices. Associated with

the non-local response are also features in PL mapping where different excitation powers

lead to different map topologies.

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Bias-dependent photoluminescence

Discovered the effect of external bias on PL intensity in thin-film CdTe PV (later verified

for thin-film CIGS PV by other groups): PL suppression under reverse bias, increase with

moderate forward bias and subsequent saturation is extremely sensitive to device

degradation. The phenomenon is shown to result from the competition between the field-

induced separation of electrons and holes and their non-radiative recombination and can

be used as a very sensitive indicator of device degradation.

Low-light mesoscopic properties of thin-film solar cells

Developed database approach to statistical analysis of nominally identical solar cells.

Discovered a crossover light intensity, below which the relative fluctuations of the PV

parameters diverge. Identified a mesoscopic nature of this effect (correlation length vs.

cell diameter). This introduced a simple uniformity diagnostic technique.

Device degradation and accelerated life testing

For the first time observed that in a polycrystalline CdTe/CdS solar cell, illuminated with

a laser beam of constant power, junction PL gradually decreased over time. Two

independent mechanisms were short-time PL decrease due to local heating and more

gradual change related to the material degradation (PL fatigue). This was attributed to

defect creation by the light-generated electrons and holes. Simple analytical model that

fits the data also provides basis for accelerated life testing using PL fatigue.

Non-uniformity diagnostics

Identified nano-scale nonuniformity as a major problem reducing device efficiency and

stability. Numerically simulated system of random diodes describing effects of

nonuniformity and successfully applied it to the thermography data, in collaboration with

the Max-Plank Institute (Germany). Introduced several other mapping techniques such as

PL, open-circuit voltage, and STM current, in particular, with an industry partner, First

Solar, LLC (co-PI in the grant “Non-uniformity losses”). Within the National CdTe team,

organized collaboration in the framework of the “Micro-nonuniformity” sub-team, tasked

with correlating non-uniformities with device performance.

Computer modeling

For the first time applied computer modeling to simulate integral parameters of composite

systems of many nano-particles possessing random diode characteristics. Commercial

software PSpice was used to investigate effects of nonuniformities on cells and large-area

integrated photovoltaic modules. This resulted in several important observations, such as

disorder topology having almost no effect on the macroscopic characteristics, scaling

dependencies, and formation of closed current loops.

INDUSTRIAL RESEARCH

At First Solar, LLC, designed and implemented a testing procedure for CdTe

photovoltaic modules where optical absorption measurements were used to characterize

CdTe/CdS alloy composition vs. probe position (alloy composition mapping). Lead X-ray

diffraction (XRD) measurement project and developed associated software aimed at

studying microcrystalline structure of CdTe films. Developed the photoluminescence

(PL) mapping technique to test the device uniformity. Developed bias-dependent PL

techniques as a tool for characterizing the device stability at the earliest stage of

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degradation. Established the use of frequency-dependent capacitance techniques to

determine the density of defect states in the device and correlated increase in defect

density with device degradation.

SECOND ORDER PHASE TRANSITIONS

Studies in molecular physics of complex liquids, including light scattering,

diffusion analyses, and spatial correlations in second order phase transitions.

MISCELLANEOUS

Database design and implementation, computer programming for scientific

applications.

CURRENT AND RECENT RESEARCH SUPPORT

Title: Joint initiative in a new type of nuclear radiation detector through faculty

development between the departments of Radiation Oncology and Physics and

Astronomy

Funding period: 06/06/12 - 06/07/16

Role: faculty served by the grant; PI: Chen C.; co-PI: Anderson L.

Agency/Mechanism: NRC, Faculty development award

Title: Feasibility of a New Thermo-brachytherapy Seed for Concurrent Brachytherapy and

Hyperthermia Treatments in Prostate Cancer

Agency/Mechanism: Subaward, main funding: NIH - STTR Phase I with BEST Medical

International, Inc.

Funding period: 09/28/2011-04/30/2013

Role: Co-I; PI: Parsai, E.I.; other Co-I’s: Feldmeier, J.J., Li, C., from BEST Medical, M.

Subramanian

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LIST OF PUBLICATIONS

Refereed Journals:

1. Whisker growth on Sn thin film accelerated under gamma-ray induced electric field,

Morgan Killefer, Vamsi Borra, Ahmed Al-Bayati, Daniel G. Georgiev, Victor G.

Karpov, E. Ishmael Parsai, and Diana Shvydka,

Journal of Physics D 50, 2017 (in press).

2. Use of novel thermobrachytherapy seeds for realistic prostate seed implant treatments,

G. Warrell, Diana Shvydka, E.I. Parsai,

Medical Physics 43, 2016, pp. 6033-6048.

3. Thin-film CdTe detector for microdosimetric study of radiation dose enhancement at

gold-tissue interface,

N. Paudel, Diana Shvydka, E.I. Parsai,

Journal of Applied Clinical Medical Physics 17, 2016, pp. 500-508.

4. A novel property of gold nanoparticles: free radical generation under microwave

irradiation,

N. Paudel, D. Shvydka, E.I. Parsai,

Medical Physics 43, 2016, pp. 1598-1602

5. Electric field stimulated growth of Zn whiskers,

D. Niraula, J. McCulloch, G. R. Warrell, R. Irving, V. G. Karpov, and Diana

Shvydka,

AIP Advances 6, 2016, p.075201-1-10.

6. Surface parameters determining a metal propensity for whiskers,

Diana Shvydka and V. G. Karpov,

Journal of Applied Physics 119, 2016, p. 085301-1-8.

7. Electron beam induced growth of tin whiskers,

A.C. Vasko, G. R. Warrell, E. Parsai, V. G. Karpov, and Diana Shvydka,

Journal of Applied Physics 118, 2015, pp.125301-1-5

8. Comparative study of experimental enhancement in free radical generation against

Monte Carlo modeled enhancement in radiation dose deposition due to the presence

of high Z materials during irradiation of aqueous media,

N. Paudel, Diana Shvydka, E. I. Parsai,

International Journal of Medical Physics, Clinical Engineering and Radiation

Oncology 4, 2015, pp. 300-307

9. Semi-shunt field emission in electronic devices,

V. G. Karpov and Diana Shvydka,

Appl. Phys. Lett. 105, 2014, p. 053904

10. Practical considerations for maximizing heat production in a novel

thermobrachytherapy seed prototype,

B. Gautam, G. Warrell, Diana Shvydka, M. Subramanian, E. I. Parsai,

Medical Physics 41, 2014, p. 023301.

11. Performance of Large Area Thin-Film CdTe Detector in Diagnostic X-Ray Imaging,

Diana Shvydka, X. Jin, E. I. Parsai,

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International Journal of Medical Physics, Clinical Engineering and Radiation

Oncology 2, 2013, pp.98-109.

12. Dosimetric and Thermal Properties of a Newly Developed Thermobrachytherapy

Seed with Ferromagnetic Core for Treatment of Solid Tumors,

B. Gautam, E. I. Parsai, Diana Shvydka, J.J. Feldmeier, M. Subramanian,

Medical Physics 39, 2012, pp.1980-1990.

13. Evaluation of a novel thermobrachytherapy seed for concurrent administration of

brachytherapy and magnetically mediated hyperthermia in treatment of solid tumors,

E.I. Parsai, B. Gautam, and Diana Shvydka,

Journal of Biomedical Phys Eng 1, 2011, pp. 5-16.

14. Design and optimization of large area thin-film CdTe detector for radiation therapy

imaging applications,

E. I. Parsai, Diana Shvydka, J. Kang,

Medical Physics 37, 2010, pp. 3980-3994.

15. Quantitative and analytical comparison of isodose distributions for shaped electron

fields from ADAC Pinnacle treatment planning system and Monte Carlo simulations,

E. I. Parsai, Diana Shvydka, J. Kang, P. Chan, D. Pearson, F. Ahmad,

Applied Radiation and Isotopes 68 2010, pp. 2174-80.

16. Response to Letter to the Editor published in ARI 67 (2009) 206-207,

E. Parsai, Diana Shvydka,

Applied Radiation and Isotopes 68 2010, pp. 467-468.

17. Theory of electronic transport in noncrystalline junctions,

M. Nardone, V.G. Karpov, Diana Shvydka, and M. L. C Attygalle,

Journal of Applied Physics 106, 2009, p. 074503.

18. From Photovoltaics to Medical Imaging: Applications of Thin Film CdTe in X-ray

Detection,

J. Kang, E. I. Parsai, D. Albin, V. G. Karpov, and Diana Shvydka,

Applied Physics Letters 93, 2008 pp. 223507-01-03.

19. Surface and build-up region dose analysis for clinical radiotherapy photon beams,

E. Ishmael Parsai, Diana Shvydka, David Pearson, M. Gopalakrishnan, and John J.

Feldmeier,

Applied Radiation and Isotopes 66, 2008, pp. 1438-1442.

20. Nanodipole photovoltaics,

Diana Shvydka and V.G. Karpov

Applied Physics Letters 92, 2008, pp. 115314 - 115318.

21. Radiation hardness studies of CdTe thin films for clinical high-energy photon beam

detectors,

Diana Shvydka, E. Parsai, J. Kang,

Nuclear Instruments and Methods in Physics Research, A 586, 2008, pp. 169-173.

22. Piezo-photovoltaic coupling in CdS-based thin-film photovoltaics,

M. Mitra, J. Drayton, M. L. C. Cooray, V. G. Karpov, and Diana Shvydka

Journal of Applied Physics 102, 2007, p.034505.

23. Pyroelectric coupling in thin-film PV,

V. G. Karpov and Diana Shvydka,

Phys. Status Solidi (Rapid Research Letters) 1, 2007, p.132.

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24. Physics of ultrathin photovoltaics,

V. G. Karpov, M.L.C. Cooray, and Diana Shvydka,

Applied Physics Letters 89, 2006, p. 163518.

25. Piezo-effect and physics of CdS based thin-film photovoltaics,

Diana Shvydka, J. Drayton, A. D. Compaan, and V. G. Karpov,

Applied Physics Letters 87, 2005, pp 123505-1-3.

26. Power generation in random diode arrays,


Physical Review B 71, 2005, pp. 115314-1-5.

27. Back contact and reach-through diode effects in thin-film photovoltaics,

Y. Roussillon, V. G. Karpov, Diana Shvydka, J. Drayton, and A. D. Compaan,

Journal of Applied Physics 96, 2004, pp. 7283-7288.

28. E2 phase transition: thin film breakdown and Schottky barrier suppression,

V. G. Karpov, Diana Shvydka and Y. Roussillon,

Physical Review B 70, 2004, pp. 155332-1-5.

29. Reach-through band bending in semiconductor thin films,

Y. Roussillon, D. M. Giolando, V. G. Karpov, Diana Shvydka, and A. D. Compaan,

Applied Physics Letters 85, 2004, pp 3617-3619.

30. Random diode arrays and mesoscale physics of large-area semiconductor devices,

V. G. Karpov, A. D. Compaan, and Diana Shvydka,

Physical Review B 69, 2004, pp.045325-1-12.

31. Lock-in thermography and nonuniformity modeling of thin-film CdTe solar cells,

Diana Shvydka, J.P. Rakotoniaina, and O. Breitenstein,

Applied Physics Letters 84, 2004, pp.729-731.

32. Blocking thin film nonuniformities: photovoltaicself-healing,

Y. Roussillon, D. Giolando, Diana Shvydka, A. D. Compaan, and V. G. Karpov,

Applied Physics Letters 84, 2004, pp.616-618.

33. Admittance spectroscopy revisited: Single defect admittance and displacement

current,

V. G. Karpov, Diana Shvydka, U. Jayamaha and A. D. Compaan,


34. Photoluminescence Fatigue and Related Degradation in Thin-Film Photovoltaics,

Diana Shvydka, C. Verzella , V. G. Karpov and A. D. Compaan,


35. Low Light Divergence In Photovoltaic Parameter Fluctuations,

Diana Shvydka, V. G. Karpov and A. D. Compaan,

Applied Physics Letters 82, 2003, pp. 2157-2159.

36. Nonlocal response in CdTe photovoltaics,

Diana Shvydka, A. D. Compaan and V. G. Karpov,


37. Effects of nonuniformity in thin-film photovoltaics,



38. Bias-dependent photoluminescence in CdTe photovoltaics,


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39. Optical properties of CdTe1-xSx (0 x 1): Experiment and modeling,

K. Wei, Fred H. Pollak, J.L. Freeouf, Diana Shvydka and A.D. Compaan,


40. The particularities of binary mixture component movement near the exfoliation

critical point,

L.A. Bulavin, A.D. Alekhin, D.B. Konvay (maiden name), D.I. Malyarenko,

Condensed Matter Physics Journal, n. 9, 1996, pp. 11-16.

Conference proceedings/abstracts:

1. Gamma-Ray Induced Growth of Metal Whiskers,

M. Killefer, V. Borra, A. Al-Bayati, E. Parsai, D. Georgiev, V. Karpov, D. Shvydka, ,

Medical Physics 44, p.2830 (2017).

2. An Investigation of Radiation Dose Enhancement at the Water-Gold Interface and Its

Correlation with Free Radical Generation,

K. Xie, C. Liu, E. Parsai, D. Shvydka,

Medical Physics 44, p.2909-2910 (2017).

3. The Accuracy of the Photon Beam Energy Spectrum Modeled by the Pinnacle

Treatment Planning System and Its Effects On SRS and SBRT Treatment Planning,

N Staley, N Sperling, D Shvydka,

Medical Physics 44, p.2986 (2017).

4. Thermal and Dosimetric Properties of a Ferrite-Based Thermo-Brachytherapy Seed,

G. Warrell, D. Shvydka, and E. I. Parsai,

Medical Physics 43, 2016, p.3811.

5. BEST IN PHYSICS (THERAPY): Assessment of Thin-Film CdTe as An Effective

Detector for Microdosimety at Gold-Tissue Interface,

N. Paudel, D. Shvydka, and E. I. Parsai,


6. One-Pixel Prototype of a Novel Polycrystalline CdTe-Based Multilayer Detector for

Radiation Therapy Imaging Applications,

D. Shvydka, V. Karpov, G. Warrell, and E. Parsai,


7. Growth of Metal Whiskers Under External Beam Irradiation: Experimental Evidence

and Implications in Medical Electronic Devices for Radiation Therapy Treatments,

D. Shvydka, G. Warrell, E. Parsai, V. Karpov, and A. Vasko,

Medical Physics 42, 2015, p.3437

8. Direct Verification of a Treatment Planning System Megavoltage Linac Beam Photon

Spectra Models, and Analysis of the Effects On Patient Plans,

D. Leheta, D. Shvydka, and E. Parsai,


9. Radiation and Thermal Dosimetric Considerations of a Combination of Hyperthermia

and Thermo-Brachytherapy Seeds,

G. Warrell, D. Shvydka and E.I. Parsai,


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10. Evaluation of a MapCHECK2(tm) Planar 2-D Diode Array for High-Dose-Rate

Brachytherapy Treatment Delivery Verifications,

N. Macey, M. Siebert, D. Shvydka, and E. Parsai,


11. Experimental Evaluation of Free Radical Generation in Nanoparticle-Aided HDR

Brachytherapy,

N. Paudel, D. Shvydka, E. Findsen, and E. Parsai,

International Journal of Radiation Oncology, Biology, Physics. 90, 2014. p. S198-

S199.

12. Computationally-Obtained Thermal Distributions for LDR Thermobrachytherapy

Seeds in Clinical Implants,

G. Warrell, D. Shvydka, and E. Parsai,

International Journal of Radiation Oncology, Biology, Physics. 90, 2014. p. S414.

13. Free Radical Generation Under the Conditions of Nanoparticle-Aided Microwave

Hyperthermia,

N. Paudel, D. Shvydka, V. Karpov, E. Findsen, and E. Parsai,


S945.

14. Retrospective Evaluation of Thermal Coverage by Thermobrachytherapy Seed

Arrangements of Clinical LDR Prostate Implants,

G. Warrell, D. Shvydka, C. Chen, and E. Parsai,

Med. Phys. 41, 2014, p.390.

15. Nanoparticle-Aided Microwave Hyperthermia Is Accompanied By Free Radical

Generation and Enhanced Cell Kill,

N. Paudel, D. Shvydka, V. Karpov, E. Findsen, and E. Parsai,

Med. Phys. 41, 2014, p.517.

16. Design of a Novel Multilayer Detector Based on Thin-Film Cadmium Telluride for

High Energy Photon Imaging in Radiation Therapy Applications.

D. Shvydka, V.G. Karpov, N. Paudel, E.I. Parsai,


17. Experimental Verification of Thermal Dose Distributions of a Novel Thermo

Brachytherapy Seed for LDR Seed Implants,

G.R. Warrell, B. Gautam, D. Shvydka, E.I. Parsai,


S760.

18. Dosimetric Analysis of Irregular Surfaces Treated With the Leipzig and Valencia

HDR Skin Applicators,

E. Parsai, S. Horne, D. Shvydka, T.M. Carroll,


19. Novel Multilayer Detector Design Using Polycrystalline CdTe for Radiation Therapy

Imaging Applications,

D. Shvydka,V. Karpov, N. Paudel, and E. Parsai,


20. Experimental Evaluation of Free Radical Generation in Nanoparticle‐Aided Radiation

Therapy

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N. Paudel, D. Shvydka, E. Findsen, and E. Parsai,


21. Experimental Verification of the Thermal Properties of a Novel LDR

Thermo‐Brachytherapy Seed

G. Warrell, B. Gautam, D. Shvydka, M. Subramanian, T. Ng, and E. Parsai,


22. Study of the Radiation Dose Enhancement at the Gold-Tissue Interface in Gold

Nanoparticle-aided Radiation Therapy With Microdosimetry Technique,

E. Parsai, N. Paudel, D. Shvydka,

International Journal of Radiation Oncology, Biology, Physics 84, 2012. p. S871.

23. Quantitative Analysis of Head Scatter and Jaw Transmission Correction Factor for

Enhanced Dynamic Wedge Fields Using a 2-dimensional Diode Array,

E. Parsai, E.C. Dickerson, D. Shvydka,

International Journal of Radiation Oncology, Biology, Physics 84, 2012. p. S803-

S804.

24. Micro-Dosimetry Study of the Radiation Dose Enhancement at the Gold-Tissue

Interface for Nanoparticle-Aided Radiation Therapy,

N. Paudel, D. Shvydka, E. Parsai,


25. Comparison of the Radiation and Thermal Dose Distributions of a Novel Thermo-

Brachytherapy Seed,

G. Warrell, D. Shvydka, B. Gautam, E. Parsai,


26. Practical Considerations for Maximizing Heat Production in Novel Thermo-

Brachytherapy Seed Prototype,

B. Gautam, D. Shvydka, E. Parsai,


27. Quantitative Assessment of the Source Attenuation for the New CT Compatible

Titanium Fletcher-Suit-Delclos (FSD) Gynecologic Applicator,

N. Soni, B. Gautam, D. Shvydka, E. Parsai,


28. Quantitative evaluation of the radiation dose enhancement at the gold-tumor interface

when gold nanoparticles are used for radiation therapy,

D. Shvydka, N. Paudel, E. Parsai,


29. Study of the effect of blood perfusion rate on thermal distribution of a newly designed

thermo-brachytherapy seed for treatment of solid tumors in induction heating,

Parsai, E., Gautam, B., Shvydka, D., Feldmeier, J.J.


30. Finding the Optimal Thickness of Large Area Thin-Film CdTe Detector Under

Diagnostic X-Ray Beams,

X. Jin, D. Shvydka, E. Parsai,


31. Investigation of the Effect of the Gold-Tissue Interface On the Radiation Dose

Enhancement Due to Gold Nanoparticles,

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N. Paudel, D. Shvydka, E. Parsai,


32. Advantages of Implementation of a Self-Regulating Thermobrachy Seed for Solid

Tumors,

B. Gautam, D. Shvydka, J. Feldmeier, M. Subramanian, E. Parsai,


33. A Novel Device for Delivering Combined Partial Breast Hyperthermia and Partial

Breast Irradiation,

T. White, D. Shvydka, E. Parsai,


34. Thin Film CdTe Photovoltaic Detector Performance under Diagnostic X-Ray Beams,

X. Jin, I. Parsai, and D. Shvydka,


35. Three-Dimentional Dosimetric and Thermal Properties of a Newly Developed

Ferromagnetic Core Thermobrachytherapy Seed for Treatment of Solid Tumors,

B. Gautam, D. Shvydka, E. Parsai, and J. Feldmeier,


36. Understanding and mitigating effects of nonuniformities on reliability of thin film

photovoltaics,

Karpov V. G., Diana Shvydka,

Proceedings of SPIE 7412, Reliability of Photovoltaic Cells, Modules,

Components, and Systems II, Editors N.G. Dhere; J. H. Wohlgemuth; D. T.

Ton, 2009, p.74120L - 74120L-15.

37. Monte Carlo Simulation of Thin-Film CdTe Detector Performance for Diagnostic

Imaging Applications,

X. Jin, E.I Parsai, D.Shvydka, J. Kang,

Med. Phys. 36, 2009, p. 2462.

38. Investigating Thermal Properties of a Thermobrachytherapy Radioactive Seed for

Concurrent Brachytherapy and Hyperthermia Treatments: Design Considerations

D.Shvydka, B. Gautam, E.I Parsai, J. Feldmeier,

Med. Phys. 36, 2009, p. 2528.

39. Investigating Radiation Properties of a New Radioactive Seed for Concurrent

Brachytherapy and Hyperthermia Treatments: A Monte Carlo Study,

N. Khan, E.I Parsai, J. Feldmeier, D.Shvydka,

Med. Phys. 36, 2009, p. 2530.

40. Theoretical Analysis of a New Generation Portal Imaging Sensor Based On Thin-Film

CdTe: A Feasibility Study For Clinical High Energy X-Ray Detection,

Kang, J., Parsai, E.I. , Shvydka, D.


41. Patient Scatter Analysis for A New Generation of Portal Imaging Sensors Based On

Thin-Film Cadmium Telluride,

Shvydka, D., Parsai, E.I., Kang, J., D. Pearson, J. J. Feldmeier,


42. A New Generation of Electronic Portal Imaging Devices (EPID) Using Thin-Film

CdTe for Radiation Oncology Applications,

14

Diana Shvydka, E. Parsai, J. Kang, D. Pearson


43. Pressure dependence of photovoltaic parameters in thin film Cu(In,Ga)Se2 solar cells,

Diana Shvydka, J. Drayton1, M. Mitra, S.X. Marsillac, F. Jacob,

Proceedings of IEEE 4th World Conference on Photovoltaic Energy Conversion,

Waikoloa, Hawaii May 7-12, 2006 (IEEE, Piscataway, NJ 2006), p.465.

44. Piezo-photovoltaic coupling in thin-film CdS/CdTe solar cells,

Jennifer Drayton, M. Mitra, and Diana Shvydka,


Waikoloa, Hawaii May 7-12, 2006 (IEEE, Piscataway, NJ 2006).

45. Propagating Electric Impulses in Thin Film PV,

T. K. Wilson, Diana Shvydka and V. G. Karpov,


Waikoloa, Hawaii May 7-12, 2006 (IEEE, Piscataway, NJ 2006).

46. Understanding the Physics of CdS-based PV: Band Diagram, Interfaces, and

Nonuniformities,

V. G. Karpov, Diana Shvydka, J. Drayton, M. L. C. Cooray, and A. D. Compaan,

DOE Solar Energy Technologies Program Review Meeting, November 7-10, Denver,

Colorado, DOE/GO-1020006-2245, March (2006).

47. Spatial and Temporal Variations in Electronic Transport Through a CdTe-Based

Schottky Barrier,

Diana Shvydka, V. Parikh, V.G. Karpov and A.D. Compaan,

MRS Symposium Proceedings 865, p. F12.2, San Francisco, March 28-April 1 2005.

48. Physics of CdTe Photovoltaics: From Front to Back,

V.G. Karpov, Diana Shvydka, and Yann Roussillon,

MRS Symposium Proceedings 865, edited by W. Shafarman, T. Gessert, S. Niki, S.

Siebentritt, p. F10.1, San Francisco, March 28-April 1 2005.

49. Lateral Nonuniformity and Mesoscale Effects in Giant Area Electronics,

V. G. Karpov, Diana Shvydka, and Yann Roussillon,

MRS Symposium Proceedings 870E, edited by M. S. Shur, P. Wilson, M. Stutzmann,

p. H2.2, San Francisco, March 28-April 1 2005.

50. Modeling of nonuniformity losses in integrated large area solar cell modules,


Proceedings of 31st IEEE Photovoltaic Specialists Conference, Coronado Springs,

January 3-7, 2005, pp 359-362.

51. Physical modes of thin-film PV degradation,

V. G. Karpov, Diana Shvydka, and Yann Roussillon,


January 3-7, 2005, pp. 437-440.

52. Back contact effects in thin-film photovoltaics,

Y. Roussillon, V. G. Karpov, Diana Shvydka, J. Drayton, and A. D. Compaan,


January 3-7, 2005, pp 441-444.

53. Reach-through mechanism in CdS/CdTe solar cell,

Y. Roussillon, V. G. Karpov, Diana Shvydka, A. D. Compaan, and D. M. Giolando,

15


January 3-7, 2005, pp 340-343.

54. Photoluminescence fatigue in CdTe photovoltaics,

Diana Shvydka, C. Verzella and V. G. Karpov

MRS Symposium Proceedings 763, p. B5.7, San Francisco, April 21-25 2003.

55. The mesoscale physics of large-area photovoltaics,

V. G. Karpov, Diana Shvydka,Yann Roussillon, and A. D. Compaan,

Proceedings of 3d World Conference on Photovoltaic Energy Conversion, Osaka,

Japan, May 11-18, 2003.

56. External bias effect on junction photoluminescence in CdS/CdTe solar cells,

Diana Shvydka, A.D. Compaan, V.G. Karpov,

Proceedings of 29th IEEE Photovoltaic Specialists Conference, New Orleans, May

18-23, 2002, pp. 712-715.

57. Micrononuniformity effects in thin-film photovoltaics,



18-23, 2002, pp. 708-711.

58. Capacitance - frequency analysis of CdTe photovoltaics,

Diana Shvydka, U. Jayamaha, V. G. Karpov,


18-23, 2002, pp. 752-755.

59. Photoluminescence of CdTe:Cu and CdS:Cu,

K.J. Price, D.Grecu, Diana Shvydka and A.D. Compaan,

Proceedings of 28th IEEE Photovoltaic Specialists Conference, Anchorage,

September 15-22, 2000, p. 658.

60. Rapid optimization of CdTe1-xSx absorber films and PV devices by means of the

combinatorial method,

J.J. Hanak, E. Bykov, H. Elgamel, D. Grecu, J. Putz, D. Shvydka,

Proceedings of 28th IEEE Photovoltaic Specialists Conference, Anchorage,

September 15-22, 2000, p. 495.

61. Absorption and photoluminescence studies of lightly alloyed CdTe(S) and CdS(Te),

Diana Shvydka, K.J. Price, A.D. Compaan,

MRS Symposium Proceedings 668, p.H6.2.1, San Francisco, April 16-20 2001.

Patents:

1. Concurrent delivery of interstitial thermobrachytherapy (hyperthermia and

brachytherapy) in the treatment of cancer,

E. Ishmael Parsai, Diana Shvydka, Gregory Warrell,

Patent filed 04/21/2017, Ser.# 15/493,387.

2. Method for photovoltaic healing of non-uniformities in semiconductor devices,

V. G. Karpov, Y. Roussillon, Diana Shvydka, A. D. Compaan, D. M. Giolando,

Patent filed 1/13/2005, Ser.# 11/035,170.

3. Corrosion Resistant Electrodes and Corrosion Resistant Protective Tunneling Layers,

V.G. Karpov, Diana Shvydka, and T. Kahle, utility patent filed.

16

4. SHUNT: self-healing universal nonuniformity treatment,

V.G. Karpov and Diana Shvydka, PCT patent filed.

5. System for high energy gamma ray detection,

E. Ishmael Parsai, Diana Shvydka, June Kang, provisional patent filed.

6. Nanodipole photovoltaics,

Diana Shvydka and V.G. Karpov, PCT patent filed.

Conferences and Professional Meetings (no published manuscript):

1. Accelerated Growth of Metal Whiskers under High Energy Electron Beam Irradiation,

Diana Shvydka, J. McCulloch, G. Warrell, E. I. Parsai, V. Karpov,

MRS Spring meeting, Phoenix AZ, March 28-April 1 (2016).

2. Piezo-effect in CdS-based solar cells,

Diana Shvydka, Jennifer Drayton, Mukut Mitra,

Proceedings of the 19th National CdTe R&D Meeting, Editors: H. S. Ullal. P. V.

Meyers, and C. Ferekides, Golden, Colorado, March 9-10 (2006).

3. Indicative facts and device model,

V. G. Karpov, Diana Shvydka, J. Drayton, L. Cooray, and A. D. Compaan,



4. Back contact and nonuniformity,

V. G. Karpov, Diana Shvydka, J. Drayton, Y. Roussillon, and A. D. Compaan,



5. Piezo-effect in CdS/CdTe solar cells,

Diana Shvydka, J.Drayton, V. G. Karpov and A.D. Compaan,

National CdTe R&D Team Meeting; Golden, CO; May 5-6, 2005.

6. Modeling of non-uniformity losses in integrated large-area modules,


National CdTe R&D Team Meeting; Perrysburg, OH; February 26-27, 2004.

7. Thermography Mapping and Modeling,

Diana Shvydka, J.P. Rakotoniaina and O. Breitenstein,

National CdTe R&D Team Meeting; FSEC, Golden, CO; July 10-11, 2003.

8. Photoluminescence Mapping,


National CdTe R&D Team Meeting; FSEC, Golden, CO; July 10-11, 2003.

9. Low Light Diagnostics in Thin-Film Photovoltaics,

Diana Shvydka, V.G Karpov, A.D. Compaan,

APS March meeting, Austin, TX, March 3-7, 2003

10. Low-light diagnostics


National CdTe R&D Team Meeting; FSEC, Golden, CO; November 28-29, 2002.

11. Capacitance spectroscopy of defect states in thin film CdTe/CdS junction,

Diana Shvydka, U. Jayamaha, V. G. Karpov and A. D. Compaan,

APS March meeting, Indianapolis, IN, March 18-22 2002.

17

12. Field-dependent photoluminescence from thin-film CdTe/CdS junction,


APS March meeting, Indianapolis, IN, March 18-22 2002.

13. Characterization of Micrononuniformities by Photoluminescence Mapping,

Diana Shvydka, A. D. Compaan, A.Gupta and V. G. Karpov,

National CdTe R&D Team Meeting; FSEC, Cocoa, FL; March 14-15, 2002.

14. Capacitance Spectroscopy of Defect States,

Diana Shvydka, U. Jayamaha and V. G. Karpov,

National CdTe R&D Team Meeting; FSEC, Cocoa, FL; March 14-15, 2002.

15. Bias-dependent luminescence in CdS/CdTe cells,

A. D. Compaan, Diana Shvydka, K.J. Price, A. Vasko, V.G. Karpov,

NCPV meeting, October 2001.

16. Nonlocal optical response in CdTe photovoltaics,


NCPV meeting, October 2001.

17. Experimental study of absorption edge in CdSxTe1-x films,

Diana Shvydka, K.B. Makhratchev, I. Matulionis, A. D. Compaan

APS March meeting, Atlanta, March 1999.

Documents

Curriculum Vitae - University of Toledo · Specifically, through electron paramagnetic resonance (EPR) technique established that under Ir-192 HDR source (0.38MeV average energy)