Publications of Steven A. Cummer    :chronological  alphabetical  combined  bibtex listing:

Papers Published

1. Cummer, SA, Design for simplified materials in transformation electromagnetics, in Transformation Electromagnetics and Metamaterials: Fundamental Principles and Applications, vol. 9781447149965 (July, 2014), pp. 117-137, Springer London, ISBN 1447149955 [doi]  [abs]

Papers Published

1. Pu, Y; Cummer, SA; Lyu, F; Zheng, Y; Briggs, MS; Lesage, S; Mailyan, B; Roberts, OJ, Unsupervised Clustering and Supervised Machine Learning for Lightning Classification: Application to Identifying EIPs for Ground-Based TGF Detection, Journal of Geophysical Research: Atmospheres, vol. 128 no. 9 (May, 2023) [doi]  [abs]
2. Shen, C; Rohde, C; Cushing, CW; Li, J; Tan, ZJ; Du, H; Peng, X; Wilson, PS; Haberman, MR; Fang, NX; Cummer, SA, Anisotropic Metallic Microlattice Structures for Underwater Operations, Advanced Engineering Materials, vol. 25 no. 6 (March, 2023) [doi]  [abs]
3. Shen, L; Tai, J; Crivoi, A; Li, J; Cummer, S; Fan, Z, Self-stabilizing three-dimensional particle manipulation via a single-transducer acoustic tweezer, Applied Physics Letters, vol. 122 no. 9 (February, 2023) [doi]  [abs]
4. Huang, A; Cummer, SA; Pu, Y; Chanrion, OA; Neubert, T; Reglero, V; Østgaard, N, Transition in Optical and Radio Features During the Early Development of Negative Intracloud Leader, Geophysical Research Letters, vol. 49 no. 22 (November, 2022) [doi]  [abs]
5. Huang, L; Jia, B; Pilipchuk, AS; Chiang, Y; Huang, S; Li, J; Shen, C; Bulgakov, EN; Deng, F; Powell, DA; Cummer, SA; Li, Y; Sadreev, AF; Miroshnichenko, AE, General Framework of Bound States in the Continuum in an Open Acoustic Resonator, Physical Review Applied, vol. 18 no. 5 (November, 2022) [doi]  [abs]
6. Boggs, LD; Mach, D; Bruning, E; Liu, N; van der Velde, OA; Montanyá, J; Cummer, S; Palivec, K; Chmielewski, V; MacGorman, D; Peterson, M, Upward propagation of gigantic jets revealed by 3D radio and optical mapping., Science Advances, vol. 8 no. 31 (August, 2022), pp. eabl8731 [doi]  [abs]
7. Pu, Y; Liu, N; Cummer, SA, Quantification of Electric Fields in Fast Breakdown During Lightning Initiation From VHF-UHF Power Spectra, Geophysical Research Letters, vol. 49 no. 5 (March, 2022) [doi]  [abs]
8. Berge, N; Celestin, S; Garnung, MB; Xu, W; Marshall, RA; Cummer, SA, Modeling Low-Frequency Radio Emissions From Terrestrial Gamma Ray Flash Sources, Journal of Geophysical Research: Atmospheres, vol. 127 no. 5 (March, 2022) [doi]  [abs]
9. Li, J; Jing, Y; Cummer, SA, Nonreciprocal coupling in space-time modulated systems at exceptional points, Physical Review B, vol. 105 no. 10 (March, 2022) [doi]  [abs]
10. Granger, J; Cummer, SA; Lohmann, KJ; Johnsen, S, Environmental sources of radio frequency noise: potential impacts on magnetoreception., Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology, vol. 208 no. 1 (January, 2022), pp. 83-95 [doi]  [abs]
11. Li, J; Crivoi, A; Peng, X; Shen, L; Pu, Y; Fan, Z; Cummer, SA, Three dimensional acoustic tweezers with vortex streaming, Communications Physics, vol. 4 no. 1 (December, 2021) [doi]  [abs]
12. Li, J; Shen, C; Huang, TJ; Cummer, SA, Acoustic tweezer with complex boundary-free trapping and transport channel controlled by shadow waveguides., Science Advances, vol. 7 no. 34 (August, 2021), pp. eabi5502 [doi]  [abs]
13. Lyu, F; Cummer, SA; Krehbiel, PR; Rison, W; Bruning, EC; Rutledge, SA, A Distinct Class of High Peak-Current Lightning Pulses Over Mountainous Terrain in Thunderstorms, Geophysical Research Letters, vol. 48 no. 14 (July, 2021) [doi]  [abs]
14. Huang, A; Yang, J; Cummer, SA; Lyu, F; Liu, N, Examining the Capacity of Hurricane Matthew (2016) in Spawning Halo/Sprite-Producible Lightning Strokes During Its Lifetime, Journal of Geophysical Research: Atmospheres, vol. 126 no. 14 (July, 2021) [doi]  [abs]
15. Pu, Y; Cummer, SA; Liu, N, VHF Radio Spectrum of a Positive Leader and Implications for Electric Fields, Geophysical Research Letters, vol. 48 no. 11 (June, 2021) [doi]  [abs]
16. Lyu, F; Cummer, SA; Briggs, M; Smith, DM; Mailyan, B; Lesage, S, Terrestrial Gamma-Ray Flashes Can Be Detected With Radio Measurements of Energetic In-Cloud Pulses During Thunderstorms, Geophysical Research Letters, vol. 48 no. 11 (June, 2021) [doi]  [abs]
17. Østgaard, N; Cummer, SA; Mezentsev, A; Luque, A; Dwyer, J; Neubert, T; Reglero, V; Marisaldi, M; Kochkin, P; Sarria, D; Lehtinen, N; Ullaland, K; Yang, S; Genov, G; Chanrion, O; Christiansen, F; Pu, Y, Simultaneous Observations of EIP, TGF, Elve, and Optical Lightning, Journal of Geophysical Research: Atmospheres, vol. 126 no. 11 (June, 2021) [doi]  [abs]
18. Ren, H; Lu, G; Cummer, SA; Peng, KM; Lyons, WA; Liu, F; Li, X; Wang, Y; Zhang, S; Cheng, Z, Comparison Between High-Speed Video Observation of Sprites and Broadband Sferic Measurements, Geophysical Research Letters, vol. 48 no. 10 (May, 2021) [doi]  [abs]
19. Shen, C; Lu, S; Tian, Z; Yang, S; Cardenas, JA; Li, J; Peng, X; Huang, TJ; Franklin, AD; Cummer, SA, Electrically Tunable Surface Acoustic Wave Propagation at MHz Frequencies Based on Carbon Nanotube Thin-Film Transistors, Advanced Functional Materials, vol. 31 no. 18 (May, 2021) [doi]  [abs]
20. Zhang, H; Lu, G; Lyu, F; Xiong, S; Ahmad, MR; Yi, Q; Li, D; Xian, T; Yang, J; Liu, F; Zhu, B; Pu, Y; Cummer, SA; Briggs, MS; Qie, X, On the Terrestrial Gamma-Ray Flashes Preceding Narrow Bipolar Events, Geophysical Research Letters, vol. 48 no. 8 (April, 2021) [doi]  [abs]
21. Huang, A; Cummer, SA; Pu, Y, Lightning Initiation From Fast Negative Breakdown is Led by Positive Polarity Dominated Streamers, Geophysical Research Letters, vol. 48 no. 8 (April, 2021) [doi]  [abs]
22. Cushing, CW; Wilson, PS; Haberman, MR; Shen, C; Li, J; Cummer, SA; Tan, ZJ; Ma, C; Du, H; Fang, NX, Characterization of an underwater metamaterial made of aluminum honeycomb panels at low frequencies., The Journal of the Acoustical Society of America, vol. 149 no. 3 (March, 2021), pp. 1829 [doi]  [abs]
23. Lyu, F; Cummer, SA; Chen, M; Qin, Z; Lyu, W; Sun, J, Three-dimensional mapping of two coincident flashes - An upward positive flash triggered by the in-cloud activity of a downward negative flash, Atmospheric Research, vol. 250 (March, 2021) [doi]  [abs]
24. Wang, Y; Lu, G; Peng, KM; Ma, M; Cummer, SA; Chen, AB; Zhu, B, Space-Based Observation of a Negative Sprite With an Unusual Signature of Associated Sprite Current, Journal of Geophysical Research: Atmospheres, vol. 126 no. 4 (February, 2021) [doi]  [abs]
25. Peng, X; Li, J; Shen, C; Cummer, SA, Efficient scattering-free wavefront transformation with power flow conformal bianisotropic acoustic metasurfaces, Applied Physics Letters, vol. 118 no. 6 (February, 2021) [doi]  [abs]
26. Mailyan, B; Stanbro, M; Briggs, MS; Cummer, S; Dwyer, JR; Roberts, OJ; Holzworth, R, Radio Frequency Emissions Associated With Multi-Pulsed Terrestrial Gamma-Ray Flashes, Journal of Geophysical Research: Space Physics, vol. 126 no. 2 (February, 2021) [doi]  [abs]
27. Tian, Z; Shen, C; Li, J; Reit, E; Gu, Y; Fu, H; Cummer, SA; Huang, TJ, Correction: Programmable Acoustic Metasurfaces (Advanced Functional Materials, (2019), 29, (1808489), 10.1002/adfm.201808489), Advanced Functional Materials, vol. 30 no. 50 (December, 2020) [doi]  [abs]
28. Qin, Z; Chen, M; Lyu, F; Cummer, SA; Gao, Y; Liu, F; Zhu, B; Du, YP; Usmani, A; Qiu, Z, Prima Facie Evidence of the Fast Impact of a Lightning Stroke on the Lower Ionosphere, Geophysical Research Letters, vol. 47 no. 21 (November, 2020) [doi]  [abs]
29. Gu, Y; Chen, C; Rufo, J; Shen, C; Wang, Z; Huang, P-H; Fu, H; Zhang, P; Cummer, SA; Tian, Z; Huang, TJ, Acoustofluidic Holography for Micro- to Nanoscale Particle Manipulation., Acs Nano, vol. 14 no. 11 (November, 2020), pp. 14635-14645 [doi]  [abs]
30. Tilles, JN; Krehbiel, PR; Stanley, MA; Rison, W; Liu, N; Lyu, F; Cummer, SA; Dwyer, JR; Senay, S; Edens, H; Fan, X; Brown, RG; Wilson, J, Radio Interferometer Observations of an Energetic in-Cloud Pulse Reveal Large Currents Generated by Relativistic Discharges, Journal of Geophysical Research: Atmospheres, vol. 125 no. 20 (October, 2020) [doi]  [abs]
31. Li, J; Song, A; Cummer, SA, Bianisotropic Acoustic Metasurface for Surface-Wave-Enhanced Wavefront Transformation, Physical Review Applied, vol. 14 no. 4 (October, 2020) [doi]  [abs]
32. Fu, Y; Shen, C; Zhu, X; Li, J; Liu, Y; Cummer, SA; Xu, Y, Sound vortex diffraction via topological charge in phase gradient metagratings., Science Advances, vol. 6 no. 40 (October, 2020), pp. eaba9876 [doi]  [abs]
33. Zhang, H; Lu, G; Lyu, F; Ahmad, MR; Qie, X; Cummer, SA; Xiong, S; Briggs, MS, First Measurements of Low-Frequency Sferics Associated With Terrestrial Gamma-Ray Flashes Produced by Equatorial Thunderstorms, Geophysical Research Letters, vol. 47 no. 17 (September, 2020) [doi]  [abs]
34. Pu, Y; Cummer, SA; Huang, A; Briggs, M; Mailyan, B; Lesage, S, A Satellite-Detected Terrestrial Gamma Ray Flash Produced by a Cloud-to-Ground Lightning Leader, Geophysical Research Letters, vol. 47 no. 15 (August, 2020) [doi]  [abs]
35. Song, A; Li, J; Shen, C; Chen, T; Cummer, SA, Switchable directional sound emission with improved field confinement based on topological insulators, Applied Physics Letters, vol. 117 no. 4 (July, 2020) [doi]  [abs]
36. Zhu, X; Li, J; Shen, C; Zhang, G; Cummer, SA; Li, L, Tunable unidirectional compact acoustic amplifier via space-time modulated membranes, Physical Review B, vol. 102 no. 2 (July, 2020) [doi]  [abs]
37. Qin, Z; Chen, M; Lyu, F; Cummer, SA; Zhu, B; Liu, F; Du, Y, A GPU-Based Grid Traverse Algorithm for Accelerating Lightning Geolocation Process, Ieee Transactions on Electromagnetic Compatibility, vol. 62 no. 2 (April, 2020), pp. 489-497 [doi]  [abs]
38. Cummer, SA, Indirectly Measured Ambient Electric Fields for Lightning Initiation in Fast Breakdown Regions, Geophysical Research Letters, vol. 47 no. 4 (February, 2020) [doi]  [abs]
39. Zhu, X; Li, J; Shen, C; Peng, X; Song, A; Li, L; Cummer, SA, Non-reciprocal acoustic transmission via space-time modulated membranes, Applied Physics Letters, vol. 116 no. 3 (January, 2020) [doi]  [abs]
40. Pu, Y; Cummer, SA, Needles and Lightning Leader Dynamics Imaged with 100–200 MHz Broadband VHF Interferometry, Geophysical Research Letters, vol. 46 no. 22 (November, 2019), pp. 13556-13563 [doi]  [abs]
41. Song, A; Li, J; Peng, X; Shen, C; Zhu, X; Chen, T; Cummer, SA, Asymmetric absorption in acoustic metamirror based on surface impedance engineering, Physical Review Applied, vol. 12 no. 5 (November, 2019) [doi]  [abs]
42. Li, J; Zhu, X; Shen, C; Peng, X; Cummer, SA, Transfer matrix method for the analysis of space-time-modulated media and systems, Physical Review B, vol. 100 no. 14 (October, 2019) [doi]  [abs]
43. Andrews, JB; Ballentine, P; Cardenas, JA; Lim, CJ; Williams, NX; Summers, JB; Stangler, MA; Koester, DA; Cummer, SA; Franklin, AD, Printed electronic sensor array for mapping tire tread thickness profiles, Ieee Sensors Journal, vol. 19 no. 19 (October, 2019), pp. 8913-8919 [doi]  [abs]
44. van der Velde, OA; Montanyà, J; López, JA; Cummer, SA, Gigantic jet discharges evolve stepwise through the middle atmosphere., Nature Communications, vol. 10 no. 1 (September, 2019), pp. 4350 [doi]  [abs]
45. Cuesta, F; Li, J; Diaz-Rubio, A; Asadchy, V; Cummer, S; Tretyakov, S, Advanced control of invisible cavity resonators with bianisotropic metasurfaces, 2019 13th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2019 (September, 2019), pp. X098-X100, ISBN 9781728104775 [doi]  [abs]
46. Chen, ABC; Chen, H; Chuang, CW; Cummer, SA; Lu, G; Fang, HK; Su, HT; Hsu, RR, On negative Sprites and the Polarity Paradox, Geophysical Research Letters, vol. 46 no. 16 (August, 2019), pp. 9370-9378 [doi]  [abs]
47. Shen, C; Zhu, X; Li, J; Cummer, SA, Nonreciprocal acoustic transmission in space-time modulated coupled resonators, Physical Review B, vol. 100 no. 5 (August, 2019) [doi]  [abs]
48. Pu, Y; Cummer, SA; Lyu, F; Briggs, M; Mailyan, B; Stanbro, M; Roberts, O, Low Frequency Radio Pulses Produced by Terrestrial Gamma-Ray Flashes, Geophysical Research Letters, vol. 46 no. 12 (June, 2019), pp. 6990-6997 [doi]  [abs]
49. Gerard, NJ; Cui, H; Shen, C; Xie, Y; Cummer, S; Zheng, X; Jing, Y, Fabrication and experimental demonstration of a hybrid resonant acoustic gradient index metasurface at 40 kHz, Applied Physics Letters, vol. 114 no. 23 (June, 2019) [doi]  [abs]
50. Qin, Z; Cummer, SA; Du, Y; Chen, M; Zhu, B; Lyu, F; Liu, F, Potential of GPU-based grid traverse algorithm for lightning geolocation, 2019 11th Asia Pacific International Conference on Lightning, Apl 2019 (June, 2019), ISBN 9781728116952 [doi]  [abs]
51. Fu, Y; Shen, C; Cao, Y; Gao, L; Chen, H; Chan, CT; Cummer, SA; Xu, Y, Reversal of transmission and reflection based on acoustic metagratings with integer parity design., Nature Communications, vol. 10 no. 1 (May, 2019), pp. 2326 [doi]  [abs]
52. Li, J; Shen, C; Zhu, X; Xie, Y; Cummer, SA, Nonreciprocal sound propagation in space-time modulated media, Physical Review B, vol. 99 no. 14 (April, 2019) [doi]  [abs]
53. Shen, C; Li, J; Jia, Z; Xie, Y; Cummer, SA, Nonreciprocal acoustic transmission in cascaded resonators via spatiotemporal modulation, Physical Review B, vol. 99 no. 13 (April, 2019) [doi]  [abs]
54. Qin, Z; Cummer, SA; Chen, M; Lyu, F; Du, YP, A Comparative Study of the Ray Theory Model With the Finite Difference Time Domain Model for Lightning Sferic Transmission in Earth-Ionosphere Waveguide, Journal of Geophysical Research: Atmospheres, vol. 124 no. 6 (March, 2019), pp. 3335-3349 [doi]  [abs]
55. Lyu, F; Cummer, SA; Qin, Z; Chen, M, Lightning Initiation Processes Imaged With Very High Frequency Broadband Interferometry, Journal of Geophysical Research: Atmospheres, vol. 124 no. 6 (March, 2019), pp. 2994-3004 [doi]  [abs]
56. Song, A; Li, J; Shen, C; Peng, X; Zhu, X; Chen, T; Cummer, SA, Broadband high-index prism for asymmetric acoustic transmission, Applied Physics Letters, vol. 114 no. 12 (March, 2019) [doi]  [abs]
57. Tian, Z; Shen, C; Li, J; Reit, E; Gu, Y; Fu, H; Cummer, SA; Huang, TJ, Programmable Acoustic Metasurfaces., Advanced Functional Materials, vol. 29 no. 13 (March, 2019), pp. 1808489 [doi]  [abs]
58. Li, J; Díaz-Rubio, A; Shen, C; Jia, Z; Tretyakov, S; Cummer, S, Highly Efficient Generation of Angular Momentum with Cylindrical Bianisotropic Metasurfaces, Physical Review Applied, vol. 11 no. 2 (February, 2019) [doi]  [abs]
59. Díaz-Rubio, A; Li, J; Shen, C; Cummer, SA; Tretyakov, SA, Power flow-conformal metamirrors for engineering wave reflections., Science Advances, vol. 5 no. 2 (February, 2019), pp. eaau7288 [doi]  [abs]
60. Lu, G; Zhang, H; Cummer, SA; Wang, Y; Lyu, F; Briggs, M; Xiong, S; Chen, A, A comparative study on the lightning sferics associated with terrestrial gamma-ray flashes observed in Americas and Asia, Journal of Atmospheric and Solar Terrestrial Physics, vol. 183 (February, 2019), pp. 67-75, Elsevier BV [doi]  [abs]
61. Marisaldi, M; Galli, M; Labanti, C; Østgaard, N; Sarria, D; Cummer, SA; Lyu, F; Lindanger, A; Campana, R; Ursi, A; Tavani, M; Fuschino, F; Argan, A; Trois, A; Pittori, C; Verrecchia, F, On the High-Energy Spectral Component and Fine Time Structure of Terrestrial Gamma Ray Flashes, Journal of Geophysical Research: Atmospheres, vol. 124 no. 14 (January, 2019), pp. 7484-7497 [doi]  [abs]
62. Shen, C; Li, J; Peng, X; Cummer, SA, Synthetic exceptional points and unidirectional zero reflection in non-Hermitian acoustic systems, Physical Review Materials, vol. 2 no. 12 (December, 2018) [doi]  [abs]
63. Huang, A; Lu, G; Yue, J; Lyons, W; Lucena, F; Lyu, F; Cummer, SA; Zhang, W; Xu, L; Xue, X; Xu, S, Observations of Red Sprites Above Hurricane Matthew, Geophysical Research Letters, vol. 45 no. 23 (December, 2018), pp. 13-165 [doi]  [abs]
64. Li, J; Shen, C; Diaz-Rubio, A; Tretyakov, SA; Cummer, SA, Bianisotropic Acoustic Metasurface for Highly Efficient Wavefront Transformation, 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2018 (November, 2018), pp. 254-256, IEEE, ISBN 9781538647028 [doi]  [abs]
65. Diaz-Rubio, A; Li, J; Shen, C; Cummer, SA; Tretyakov, SA, High-effcient Acoustic Anomalous Reflector Based on Power-flow Conformal Metamirror, 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials 2018 (November, 2018), pp. 477-479, IEEE, ISBN 9781538647028 [doi]  [abs]
66. Xie, Y; Fu, Y; Jia, Z; Li, J; Shen, C; Xu, Y; Chen, H; Cummer, SA, Acoustic Imaging with Metamaterial Luneburg Lenses., Scientific Reports, vol. 8 no. 1 (November, 2018), pp. 16188 [doi]  [abs]
67. Stanbro, M; Briggs, MS; Roberts, OJ; Cramer, ES; Cummer, SA; Grove, JE, A Study of Consecutive Terrestrial Gamma-ray Flashes Using the Gamma-ray Burst Monitor, Journal of Geophysical Research: Space Physics, vol. 123 no. 11 (November, 2018), pp. 9634-9651, American Geophysical Union (AGU) [doi]  [abs]
68. Fu, Y; Li, J; Xie, Y; Shen, C; Xu, Y; Chen, H; Cummer, SA, Compact acoustic retroreflector based on a mirrored Luneburg lens, Physical Review Materials, vol. 2 no. 10 (October, 2018) [doi]  [abs]
69. Lu, G; Yu, B; Cummer, SA; Peng, KM; Chen, AB; Lyu, F; Xue, X; Liu, F; Hsu, RR; Su, HT, On the Causative Strokes of Halos Observed by ISUAL in the Vicinity of North America, Geophysical Research Letters, vol. 45 no. 19 (October, 2018), pp. 10-789, American Geophysical Union (AGU) [doi]  [abs]
70. Lyu, F; Cummer, SA, Energetic Radio Emissions and Possible Terrestrial Gamma-Ray Flashes Associated With Downward Propagating Negative Leaders, Geophysical Research Letters, vol. 45 no. 19 (October, 2018), pp. 10-771, American Geophysical Union (AGU) [doi]  [abs]
71. Lu, G; Fan, Y; Zhang, H; Jiang, R; Liu, M; Qie, X; Cummer, SA; Han, C; Liu, K, Measurement of continuing charge transfer in rocket-triggered lightning with low-frequency magnetic sensor at close range, Journal of Atmospheric and Solar Terrestrial Physics, vol. 175 (October, 2018), pp. 76-86, Elsevier BV [doi]  [abs]
72. McCall, M; Pendry, JB; Galdi, V; Lai, Y; Horsley, SAR; Li, J; Zhu, J; Mitchell-Thomas, RC; Quevedo-Teruel, O; Tassin, P; Ginis, V; Martini, E; Minatti, G; Maci, S; Ebrahimpouri, M; Hao, Y; Kinsler, P; Gratus, J; Lukens, JM; Weiner, AM; Leonhardt, U; Smolyaninov, II; Smolyaninova, VN; Thompson, RT; Wegener, M; Kadic, M; Cummer, SA, Roadmap on transformation optics, Journal of Optics (United Kingdom), vol. 20 no. 6 (June, 2018), pp. 063001-063001, IOP Publishing [doi]  [abs]
73. Bowers, GS; Smith, DM; Kelley, NA; Martinez-McKinney, GF; Cummer, SA; Dwyer, JR; Heckman, S; Holzworth, RH; Marks, F; Reasor, P; Gamache, J; Dunion, J; Richards, T; Rassoul, HK, A Terrestrial Gamma-Ray Flash inside the Eyewall of Hurricane Patricia, Journal of Geophysical Research: Atmospheres, vol. 123 no. 10 (May, 2018), pp. 4977-4987, American Geophysical Union (AGU) [doi]  [abs]
74. Shen, C; Cummer, SA, Harnessing Multiple Internal Reflections to Design Highly Absorptive Acoustic Metasurfaces, Physical Review Applied, vol. 9 no. 5 (May, 2018), American Physical Society (APS) [doi]  [abs]
75. Shen, C; Díaz-Rubio, A; Li, J; Cummer, SA, A surface impedance-based three-channel acoustic metasurface retroreflector, Applied Physics Letters, vol. 112 no. 18 (April, 2018), pp. 183503-183503 [doi]  [abs]
76. Li, J; Shen, C; Díaz-Rubio, A; Tretyakov, SA; Cummer, SA, Systematic design and experimental demonstration of bianisotropic metasurfaces for scattering-free manipulation of acoustic wavefronts., Nature Communications, vol. 9 no. 1 (April, 2018), pp. 1342 [doi]  [abs]
77. Liu, F; Zhu, B; Lu, G; Qin, Z; Lei, J; Peng, KM; Chen, AB; Huang, A; Cummer, SA; Chen, M; Ma, M; Lyu, F; Zhou, H, Observations of Blue Discharges Associated With Negative Narrow Bipolar Events in Active Deep Convection, Geophysical Research Letters, vol. 45 no. 6 (March, 2018), pp. 2842-2851, American Geophysical Union (AGU) [doi]  [abs]
78. Shen, C; Xie, Y; Li, J; Cummer, SA; Jing, Y, Acoustic metacages for sound shielding with steady air flow, Journal of Applied Physics, vol. 123 no. 12 (March, 2018), pp. 124501-124501, AIP Publishing [doi]  [abs]
79. Lyu, F; Cummer, SA; Krehbiel, PR; Rison, W; Briggs, MS; Cramer, E; Roberts, O; Stanbro, M, Very High Frequency Radio Emissions Associated With the Production of Terrestrial Gamma-Ray Flashes, Geophysical Research Letters, vol. 45 no. 4 (February, 2018), pp. 2097-2105, American Geophysical Union (AGU) [doi]  [abs]
80. Jia, Z; Li, J; Shen, C; Xie, Y; Cummer, SA, Systematic design of broadband path-coiling acoustic metamaterials, Journal of Applied Physics, vol. 123 no. 2 (January, 2018), pp. 025101-025101, AIP Publishing [doi]  [abs]
81. Fu, Y; Xu, Y; Chen, H; Cummer, SA, Coherent perfect absorption and laser modes in a cylindrical structure of conjugate metamaterials, New Journal of Physics, vol. 20 no. 1 (January, 2018), pp. 013015-013015, IOP Publishing [doi]  [abs]
82. Mezentsev, A; Lehtinen, N; Østgaard, N; Pérez-Invernón, FJ; Cummer, SA, Spectral Characteristics of VLF Sferics Associated With RHESSI TGFs., Journal of Geophysical Research: Atmospheres, vol. 123 no. 1 (January, 2018), pp. 139-159 [doi]  [abs]
83. Singh, R; Maurya, AK; Chanrion, O; Neubert, T; Cummer, SA; Mlynarczyk, J; Cohen, MB; Siingh, D; Kumar, S, Assessment of Unusual Gigantic Jets observed during the Monsoon season: First observations from Indian Subcontinent., Scientific Reports, vol. 7 no. 1 (November, 2017), pp. 16436 [doi]  [abs]
84. Bowers, GS; Smith, DM; Martinez-McKinney, GF; Kamogawa, M; Cummer, SA; Dwyer, JR; Wang, D; Stock, M; Kawasaki, Z, Gamma Ray Signatures of Neutrons From a Terrestrial Gamma Ray Flash, Geophysical Research Letters, vol. 44 no. 19 (October, 2017), pp. 10-070, American Geophysical Union (AGU) [doi]  [abs]
85. Fu, Y; Cao, Y; Cummer, SA; Xu, Y; Chen, H, Coherent perfect absorber and laser modes in purely imaginary metamaterials, Physical Review A, vol. 96 no. 4 (October, 2017), American Physical Society (APS) [doi]  [abs]
86. Liu, N; Dwyer, JR; Cummer, SA, Elves Accompanying Terrestrial Gamma Ray Flashes, Journal of Geophysical Research: Space Physics, vol. 122 no. 10 (October, 2017), pp. 10-576, American Geophysical Union (AGU) [doi]  [abs]
87. Lu, G; Cummer, SA; Chen, AB; Lyu, F; Li, D; Liu, F; Hsu, RR; Su, HT, Analysis of lightning strokes associated with sprites observed by ISUAL in the vicinity of North America, Terrestrial, Atmospheric and Oceanic Sciences, vol. 28 no. 4 (August, 2017), pp. 583-595, Chinese Geoscience Union [doi]  [abs]
88. Li, Y; Shen, C; Xie, Y; Li, J; Wang, W; Cummer, SA; Jing, Y, Tunable Asymmetric Transmission via Lossy Acoustic Metasurfaces., Physical Review Letters, vol. 119 no. 3 (July, 2017), pp. 035501 [doi]  [abs]
89. Xie, Y; Ye, S; Reyes, C; Sithikong, P; Popa, BI; Wiley, BJ; Cummer, SA, Microwave metamaterials made by fused deposition 3D printing of a highly conductive copper-based filament, Applied Physics Letters, vol. 110 no. 18 (May, 2017), pp. 181903-181903, AIP Publishing [doi]  [abs]
90. Carvalho, FL; Uman, MA; Jordan, DM; Hill, JD; Cummer, SA; Kotovsky, DA; Moore, RC, Triggered lightning sky waves, return stroke modeling, and ionosphere effective height, Journal of Geophysical Research, vol. 122 no. 6 (January, 2017), pp. 3507-3527, American Geophysical Union (AGU) [doi]  [abs]
91. Wang, W; Xie, Y; Popa, BI; Cummer, SA, Subwavelength diffractive acoustics and wavefront manipulation with a reflective acoustic metasurface, Journal of Applied Physics, vol. 120 no. 19 (November, 2016), pp. 195103-195103, AIP Publishing [doi]  [abs]
92. Xie, Y; Shen, C; Wang, W; Li, J; Suo, D; Popa, B-I; Jing, Y; Cummer, SA, Acoustic Holographic Rendering with Two-dimensional Metamaterial-based Passive Phased Array., Scientific Reports, vol. 6 (October, 2016), pp. 35437 [doi]  [abs]
93. Li, J; Wang, W; Xie, Y; Popa, BI; Cummer, SA, A sound absorbing metasurface with coupled resonators, Applied Physics Letters, vol. 109 no. 9 (August, 2016), pp. 091908-091908, AIP Publishing [doi]  [abs]
94. Lyu, F; Cummer, SA; Briggs, M; Marisaldi, M; Blakeslee, RJ; Bruning, E; Wilson, JG; Rison, W; Krehbiel, P; Lu, G; Cramer, E; Fitzpatrick, G; Mailyan, B; McBreen, S; Roberts, OJ; Stanbro, M, Ground detection of terrestrial gamma ray flashes from distant radio signals, Geophysical Research Letters, vol. 43 no. 16 (August, 2016), pp. 8728-8734, American Geophysical Union (AGU) [doi]  [abs]
95. Barrett, JP; Katko, AR; Cummer, SA, Transistor-based metamaterials with dynamically tunable nonlinear susceptibility, Applied Physics Letters, vol. 109 no. 6 (August, 2016), pp. 061901-061901 [doi]  [abs]
96. Lu, G; Fan, Y; Zhang, H; Jiang, R; Liu, M; Qie, X; Cummer, SA, Reconstructing initial continuous current waveform in rocket-triggered lightning with close magnetic measurement, 2016 Asia Pacific International Symposium on Electromagnetic Compatibility, Apemc 2016 (July, 2016), pp. 15-18, IEEE, ISBN 9781467394949 [doi]  [abs]
97. Popa, B-I; Wang, W; Konneker, A; Cummer, SA; Rohde, CA; Martin, TP; Orris, GJ; Guild, MD, Anisotropic acoustic metafluid for underwater operation., The Journal of the Acoustical Society of America, vol. 139 no. 6 (June, 2016), pp. 3325 [doi]  [abs]
98. Shen, C; Xie, Y; Li, J; Cummer, SA; Jing, Y, Asymmetric acoustic transmission through near-zero-index and gradient-index metasurfaces, Applied Physics Letters, vol. 108 no. 22 (May, 2016), pp. 223502-223502, AIP Publishing [doi]  [abs]
99. Popa, BI; Cummer, SA, Preserving omnidirectionality in optimized asymmetric transformation optics designs, Journal of Optics (United Kingdom), vol. 18 no. 4 (April, 2016), pp. 044018-044018, IOP Publishing [doi]  [abs]
100. Liu, N; Boggs, LD; Cummer, SA, Observation-constrained modeling of the ionospheric impact of negative sprites, Geophysical Research Letters, vol. 43 no. 6 (March, 2016), pp. 2365-2373, American Geophysical Union (AGU) [doi]  [abs]
101. Kolmašová, I; Santolík, O; Farges, T; Cummer, SA; Lán, R; Uhlíř, L, Subionospheric propagation and peak currents of preliminary breakdown pulses before negative cloud-to-ground lightning discharges, Geophysical Research Letters, vol. 43 no. 3 (February, 2016), pp. 1382-1391, American Geophysical Union (AGU) [doi]  [abs]
102. Cummer, SA; Christensen, J; Alù, A, Controlling sound with acoustic metamaterials, Nature Reviews Materials, vol. 1 no. 3 (February, 2016), pp. 16001-16001, Springer Nature [doi]  [abs]
103. Boggs, LD; Liu, N; Splitt, M; Lazarus, S; Glenn, C; Rassoul, H; Cummer, SA, An analysis of five negative sprite-parent discharges and their associated thunderstorm charge structures, Journal of Geophysical Research, vol. 121 no. 2 (January, 2016), pp. 759-784, American Geophysical Union (AGU) [doi]  [abs]
104. Xu, L; Chen, H; Tyc, T; Xie, Y; Cummer, SA, Perfect conformal invisible device with feasible refractive indexes, Physical Review B, vol. 93 no. 4 (January, 2016), American Physical Society (APS) [doi]  [abs]
105. Lyu, F; Cummer, SA; Lu, G; Zhou, X; Weinert, J, Imaging lightning intracloud initial stepped leaders by low-frequency interferometric lightning mapping array, Geophysical Research Letters, vol. 43 no. 10 (January, 2016), pp. 5516-5523, American Geophysical Union (AGU) [doi]  [abs]
106. Lu, G; Cummer, SA; Tian, Y; Zhang, H; Lyu, F; Wang, T; Stanley, MA; Yang, J; Lyons, WA, Sprite produced by consecutive impulse charge transfers following a negative stroke: Observation and simulation, Journal of Geophysical Research, vol. 121 no. 8 (January, 2016), pp. 4082-4092, American Geophysical Union (AGU) [doi]  [abs]
107. Barrett, JP; Katko, AR; Cummer, SA, Bandwidth tuning in transistor embedded metamaterials using variable resistance, Electromagnetic Waves (Cambridge, Mass.), vol. 157 (January, 2016), pp. 49-61, EMW Publishing [doi]  [abs]
108. Mezentsev, A; Østgaard, N; Gjesteland, T; Albrechtsen, K; Lehtinen, N; Marisaldi, M; Smith, D; Cummer, S, Radio emissions fromdouble RHESSI TGFs, Journal of Geophysical Research, vol. 121 no. 13 (January, 2016), pp. 8006-8022, American Geophysical Union (AGU) [doi]  [abs]
109. Hare, BM; Uman, MA; Dwyer, JR; Jordan, DM; Biggerstaff, MI; Caicedo, JA; Carvalho, FL; Wilkes, RA; Kotovsky, DA; Gamerota, WR; Pilkey, JT; Ngin, TK; Moore, RC; Rassoul, HK; Cummer, SA; Grove, JE; Nag, A; Betten, DP; Bozarth, A, Ground-level observation of a terrestrial gamma ray flash initiated by a triggered lightning, Journal of Geophysical Research, vol. 121 no. 11 (January, 2016), pp. 6511-6533, American Geophysical Union (AGU) [doi]  [abs]
110. Lang, TJ; Lyons, WA; Cummer, SA; Fuchs, BR; Dolan, B; Rutledge, SA; Krehbiel, P; Rison, W; Stanley, M; Ashcraft, T, Observations of two sprite-producing storms in Colorado, Journal of Geophysical Research, vol. 121 no. 16 (January, 2016), pp. 9675-9695, American Geophysical Union (AGU) [doi]  [abs]
111. McTague, LE; Cummer, SA; Briggs, MS; Connaughton, V; Stanbro, M; Fitzpatrick, G, A lightning-based search for nearby observationally dim terrestrial gamma ray flashes, Journal of Geophysical Research, vol. 120 no. 23 (December, 2015), pp. 12-017, American Geophysical Union (AGU) [doi]  [abs]
112. Barrett, JP; Cummer, SA, Design and full characterization of planar active magnetic RF metamaterials, Ieee Antennas and Wireless Propagation Letters, vol. 14 (December, 2015), pp. 943-946, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [doi]  [abs]
113. Somu, VB; Rakov, VA; Haddad, MA; Cummer, SA, A study of changes in apparent ionospheric reflection height within individual lightning flashes, Journal of Atmospheric and Solar Terrestrial Physics, vol. 136 (December, 2015), pp. 66-79, Elsevier BV, ISSN 1364-6826 [doi]  [abs]
114. Shen, C; Xie, Y; Sui, N; Wang, W; Cummer, SA; Jing, Y, Broadband Acoustic Hyperbolic Metamaterial., Physical Review Letters, vol. 115 no. 25 (December, 2015), pp. 254301 [doi]  [abs]
115. Kolmasova, I; Santolik, O; Farges, T; Cummer, S; Lan, R; Uhlir, L, Propagation of preliminary breakdown pulses preceding cloud-to-ground lightning discharges, 2015 1st Ursi Atlantic Radio Science Conference, Ursi at Rasc 2015 (October, 2015), IEEE, ISBN 9789090086286 [doi]  [abs]
116. Cummer, SA; Lyu, F; Briggs, MS; Fitzpatrick, G; Roberts, OJ; Dwyer, JR, Lightning leader altitude progression in terrestrial gamma-ray flashes, Geophysical Research Letters, vol. 42 no. 18 (September, 2015), pp. 7792-7798, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
117. Lyu, F; Cummer, SA; McTague, L, Insights into high peak current in-cloud lightning events during thunderstorms, Geophysical Research Letters, vol. 42 no. 16 (August, 2015), pp. 6836-6843, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
118. Xie, Y; Tsai, T-H; Konneker, A; Popa, B-I; Brady, DJ; Cummer, SA, Single-sensor multispeaker listening with acoustic metamaterials., Proceedings of the National Academy of Sciences of the United States of America, vol. 112 no. 34 (August, 2015), pp. 10595-10598, ISSN 0027-8424 [doi]  [abs]
119. Popa, BI; Shinde, D; Konneker, A; Cummer, SA, Active acoustic metamaterials reconfigurable in real time, Physical Review B, vol. 91 no. 22 (June, 2015), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
120. Popa, B-I; Cummer, SA, Water-based metamaterials: Negative refraction of sound., Nature Materials, vol. 14 no. 4 (April, 2015), pp. 363-364, ISSN 1476-1122 [doi]
121. Lang, TJ; Cummer, SA; Petersen, D; Flores-Rivera, L; Lyons, WA; MacGorman, D; Beasley, W, Large charge moment change lightning on 31 May to 1 June 2013, including the El Reno tornadic storm, Journal of Geophysical Research, vol. 120 no. 8 (January, 2015), pp. 3354-3369, American Geophysical Union (AGU), ISSN 2169-897X [doi]  [abs]
122. Cummer, SA, Active and applied functional rf metamaterials, Springer Series in Materials Science, vol. 200 (January, 2015), pp. 21-33, Springer International Publishing, ISSN 0933-033X [doi]  [abs]
123. Liu, N; Spiva, N; Dwyer, JR; Rassoul, HK; Free, D; Cummer, SA, Upward electrical discharges observed above Tropical Depression Dorian., Nature Communications, vol. 6 (January, 2015), pp. 5995 [doi]  [abs]
124. Cummer, SA; Briggs, MS; Dwyer, JR; Xiong, S; Connaughton, V; Fishman, GJ; Lu, G; Lyu, F; Solanki, R, The source altitude, electric current, and intrinsic brightness of terrestrial gamma ray flashes, Geophysical Research Letters, vol. 41 no. 23 (December, 2014), pp. 8586-8593, BLACKWELL PUBLISHING LTD, ISSN 0094-8276 [doi]  [abs]
125. Lu, G; Cummer, SA, Implications of lightning emissions for terrestrial gamma-ray flashes and associated lightning discharges, 2014 International Conference on Lightning Protection, Iclp 2014 (December, 2014), pp. 1496-1502, IEEE, ISBN 9781479935444 [doi]  [abs]
126. Lyu, F; Cummer, SA; Solanki, R; Weinert, J; McTague, L; Katko, A; Barrett, J; Zigoneanu, L; Xie, Y; Wang, W, A low-frequency near-field interferometric-TOA 3-D Lightning Mapping Array, Geophysical Research Letters, vol. 41 no. 22 (November, 2014), pp. 7777-7784, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
127. Popa, BI; Cummer, SA, Unified approach to design linear and nonlinear acoustic metamaterials, 2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, Metamaterials 2014 (November, 2014), pp. 241-243, IEEE, ISBN 9781479934522 [doi]  [abs]
128. Lu, G; Cummer, SA, Negative sprites produced by consecutive impulse charge transfers in negative strokes, 2014 31th Ursi General Assembly and Scientific Symposium, Ursi Gass 2014 (October, 2014), IEEE, ISBN 9781467352253 [doi]  [abs]
129. Cummer, SA; Briggs, MS; Connaughton, V; Xiong, S; Fishman, GJ; Dwyer, JR, Charge motion and altitude of terrestrial gamma-ray flashes, 2014 31th Ursi General Assembly and Scientific Symposium, Ursi Gass 2014 (October, 2014), IEEE, ISBN 9781467352253 [doi]  [abs]
130. Qin, J; Celestin, S; Pasko, VP; Cummer, SA; McHarg, MG; Stenbaek-Nielsen, HC, Mechanisms of sprite initiation, morphology, and lightning polarity asymmetry, 2014 31th Ursi General Assembly and Scientific Symposium, Ursi Gass 2014 (October, 2014), IEEE, ISBN 9781467352253 [doi]  [abs]
131. Barrett, JP; Cummer, SA, Design and realization of transistor-embedded active RF metamaterials, 2014 United States National Committee of Ursi National Radio Science Meeting, Usnc Ursi Nrsm 2014 (October, 2014), IEEE, ISBN 9781479931200 [doi]  [abs]
132. Katko, AR; Cummer, SA, Transistor-embedded acousto-optic and nonlinear metamaterials, 2014 United States National Committee of Ursi National Radio Science Meeting, Usnc Ursi Nrsm 2014 (October, 2014), IEEE, ISBN 9781479931200 [doi]  [abs]
133. Weinert, JL; Cummer, SA, Measurement of sensitive current and charge motion using coherent averaging of remote low frequency magnetic field observations, 2014 United States National Committee of Ursi National Radio Science Meeting, Usnc Ursi Nrsm 2014 (October, 2014), IEEE, ISBN 9781479931200 [doi]  [abs]
134. Barrett, JP; Cummer, SA, Roadmap to electrically self-tuning metamaterials: Design and experimental validation, Proceedings 2014 International Conference on Electromagnetics in Advanced Applications, Iceaa 2014 (September, 2014), pp. 341-342, IEEE, ISBN 9781467357104 [doi]  [abs]
135. Wang, W; Xie, Y; Konneker, A; Popa, BI; Cummer, SA, Design and demonstration of broadband thin planar diffractive acoustic lenses, Applied Physics Letters, vol. 105 no. 10 (September, 2014), pp. 101904-101904, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
136. Liu, L; Katko, AR; Li, D; Cummer, SA, Broadband electromagnetic metamaterials with reconfigurable fluid channels, Physical Review B, vol. 89 no. 24 (June, 2014), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
137. Katko, AR; Barrett, JP; Cummer, SA, Time-varying transistor-based metamaterial for tunability, mixing, and efficient phase conjugation, Journal of Applied Physics, vol. 115 no. 14 (April, 2014), pp. 144501-144501, AIP Publishing, ISSN 0021-8979 [doi]  [abs]
138. Zigoneanu, L; Popa, B-I; Cummer, SA, Three-dimensional broadband omnidirectional acoustic ground cloak., Nature Materials, vol. 13 no. 4 (April, 2014), pp. 352-355, ISSN 1476-1122 [repository], [doi]  [abs]
139. Xie, Y; Konneker, A; Popa, BI; Cummer, SA, Tapered labyrinthine acoustic metamaterials for coherent controlling of acoustic wave., The Journal of the Acoustical Society of America, vol. 135 no. 4 (April, 2014), pp. 2222, ISSN 0001-4966 [doi]  [abs]
140. Xie, Y; Tsai, TH; Brady, DJ; Cummer, SA, Compressive acoustic imaging with metamaterials., The Journal of the Acoustical Society of America, vol. 135 no. 4 (April, 2014), pp. 2394, ISSN 0001-4966 [doi]  [abs]
141. Xie, Y; Wang, W; Chen, H; Konneker, A; Popa, B-I; Cummer, SA, Wavefront modulation and subwavelength diffractive acoustics with an acoustic metasurface., Nature Communications, vol. 5 (January, 2014), pp. 5553 [doi]  [abs]
142. Beavis, NK; Lang, TJ; Rutledge, SA; Lyons, WA; Cummer, SA, Regional, seasonal, and diurnal variations of cloud-to-ground lightning with large impulse charge moment changes, Monthly Weather Review, vol. 142 no. 10 (January, 2014), pp. 3666-3682, American Meteorological Society, ISSN 0027-0644 [doi]  [abs]
143. Popa, B-I; Cummer, SA, Non-reciprocal and highly nonlinear active acoustic metamaterials., Nature Communications, vol. 5 (January, 2014), pp. 3398 [doi]  [abs]
144. Cummer, SA, Applied physics. Selecting the direction of sound transmission., Science (New York, N.Y.), vol. 343 no. 6170 (January, 2014), pp. 495-496, ISSN 0036-8075 [doi]
145. Yaniv, R; Yair, Y; Price, C; Bór, J; Sato, M; Hobara, Y; Cummer, S; Li, J; Devir, A, Ground-based observations of the relations between lightning charge-moment-change and the physical and optical properties of column sprites, Journal of Atmospheric and Solar Terrestrial Physics, vol. 107 (January, 2014), pp. 60-67, Elsevier BV, ISSN 1364-6826 [doi]  [abs]
146. Cummins, KL; Quick, MG; Rison, W; Krehbiel, P; Thomas, R; Rodeheffer, D; Warner, TA; Saba, MMF; Schumann, C; Myers, J; Lyons, W; Nag, A; Cramer, J; Turner, T; Samaras, T; Samaras, P; Young, C; McHarg, G; Engle, J; Cummer, SA; Lu, G, Overview of the Kansas Windfarm 2013 field program, International Conference on Atmospheric Electricity, Icae 2014 (January, 2014)  [abs]
147. Lang, TJ; Cummer, S; Petersen, D; Flores-Rivera, L; Lyons, W; MacGorman, D; Beasley, W, Large charge moment change lightning in an Oklahoma mesoscale convective system, International Conference on Atmospheric Electricity, Icae 2014 (January, 2014)  [abs]
148. Cummins, KL; Quick, MG; Rison, W; Krehbiel, P; Thomas, R; Rodeheffer, D; Warner, TA; Saba, MMF; Schumann, C; Myers, J; Lyons, W; Nag, A; Cramer, J; Turner, T; Samaras, T; Samaras, P; Young, C; McHarg, G; Engle, J; Cummer, SA; Lu, G, Overview of the Kansas Windfarm 2013 field program, International Conference on Atmospheric Electricity, Icae 2014 (January, 2014)  [abs]
149. Lang, TJ; Cummer, S; Petersen, D; Flores-Rivera, L; Lyons, W; MacGorman, D; Beasley, W, Large charge moment change lightning in an Oklahoma mesoscale convective system, International Conference on Atmospheric Electricity, Icae 2014 (January, 2014)  [abs]
150. Katko, AR; Cummer, SA, Functional metamaterials for wireless phase conjugation, Cleo: Qels Fundamental Science, Cleo:Qels Fs 2013 (November, 2013), pp. QM1A.8  [abs]
151. Xie, Y; Konneker, A; Popa, BI; Cummer, SA, Tapered labyrinthine acoustic metamaterials for broadband impedance matching, Applied Physics Letters, vol. 103 no. 20 (November, 2013), pp. 201906-201906, AIP Publishing, ISSN 0003-6951 [Gateway.cgi], [doi]  [abs]
152. Marshall, T; Stolzenburg, M; Karunarathne, S; Cummer, S; Lu, G; Betz, HD; Briggs, M; Connaughton, V; Xiong, S, Initial breakdown pulses in intracloud lightning flashes and their relation to terrestrial gamma ray flashes, Journal of Geophysical Research Atmospheres, vol. 118 no. 19 (October, 2013), pp. 10-925, American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
153. Qin, J; Celestin, S; Pasko, VP; Cummer, SA; McHarg, MG; Stenbaek-Nielsen, HC, Mechanism of column and carrot sprites derived from optical and radio observations, Geophysical Research Letters, vol. 40 no. 17 (September, 2013), pp. 4777-4782, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
154. Lang, TJ; Cummer, SA; Rutledge, SA; Lyons, WA, The meteorology of negative cloud-to-ground lightning strokes with large charge moment changes: Implications for negative sprites, Journal of Geophysical Research Atmospheres, vol. 118 no. 14 (July, 2013), pp. 7886-7896, American Geophysical Union (AGU), ISSN 2169-897X [Gateway.cgi], [doi]  [abs]
155. Popa, BI; Zigoneanu, L; Cummer, SA, Tunable active acoustic metamaterials, Physical Review B, vol. 88 no. 2 (July, 2013), American Physical Society (APS), ISSN 1098-0121 [Gateway.cgi], [doi]  [abs]
156. Lu, G; Cummer, SA; Li, J; Zigoneanu, L; Lyons, WA; Stanley, MA; Rison, W; Krehbiel, PR; Edens, HE; Thomas, RJ; Beasley, WH; Weiss, SA; Blakeslee, RJ; Bruning, EC; MacGorman, DR; Meyer, TC; Palivec, K; Ashcraft, T; Samaras, T, Coordinated observations of sprites and in-cloud lightning flash structure, Journal of Geophysical Research Atmospheres, vol. 118 no. 12 (June, 2013), pp. 6607-6632, American Geophysical Union (AGU), ISSN 2169-897X [Gateway.cgi], [doi]  [abs]
157. Cummer, SA; Lyons, WA; Stanley, MA, Three years of lightning impulse charge moment change measurements in the United States, Journal of Geophysical Research Atmospheres, vol. 118 no. 11 (June, 2013), pp. 5176-5189, American Geophysical Union (AGU), ISSN 2169-8996 [doi]  [abs]
158. Dwyer, JR; Cummer, SA, Radio emissions from terrestrial gamma-ray flashes, Journal of Geophysical Research: Space Physics, vol. 118 no. 6 (June, 2013), pp. 3769-3790, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
159. Østgaard, N; Gjesteland, T; Carlson, BE; Collier, AB; Cummer, SA; Lu, G; Christian, HJ, Simultaneous observations of optical lightning and terrestrial gamma ray flash from space, Geophysical Research Letters, vol. 40 no. 10 (May, 2013), pp. 2423-2426, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
160. Meyer, TC; Lang, TJ; Rutledge, SA; Lyons, WA; Cummer, SA; Lu, G; Lindsey, DT, Radar and lightning analyses of gigantic jet-producing storms, Journal of Geophysical Research Atmospheres, vol. 118 no. 7 (April, 2013), pp. 2872-2888, American Geophysical Union (AGU), ISSN 2169-897X [Gateway.cgi], [doi]  [abs]
161. Xie, Y; Popa, B-I; Zigoneanu, L; Cummer, SA, Measurement of a broadband negative index with space-coiling acoustic metamaterials., Physical Review Letters, vol. 110 no. 17 (April, 2013), pp. 175501 [1212.0237v1], [doi]  [abs]
162. Katko, AR; Cummer, SA, Functional metamaterials for wireless phase conjugation, 2013 Conference on Lasers and Electro Optics, Cleo 2013 (January, 2013) [doi]  [abs]
163. Hawkes, AM; Katko, AR; Cummer, SA, A microwave metamaterial with integrated power harvesting functionality, Applied Physics Letters, vol. 103 no. 16 (2013), pp. 163901-163901, AIP Publishing, ISSN 0003-6951 [Gateway.cgi], [doi]  [abs]
164. Zigoneanu, L; Popa, BI; Cummer, SA, Sound manipulation with acoustic metamaterials, 41st International Congress and Exposition on Noise Control Engineering 2012, Inter Noise 2012, vol. 2 (December, 2012), pp. 1555-1562  [abs]
165. Zigoneanu, L; Popa, BI; Cummer, SA, Sound manipulation with acoustic metamaterials, American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) Ncad (December, 2012), pp. 521-528, ISBN 9780791845325 [Gateway.cgi], [doi]  [abs]
166. Katko, AR; Hawkes, AM; Cummer, SA, Nonlinear and active RF metamaterial applications using embedded devices, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, vol. 8455 (December, 2012), SPIE, ISSN 0277-786X, ISBN 9780819491725 [Gateway.cgi], [doi]  [abs]
167. Barrett, JP; Cummer, SA, Active nonlinear metamaterials loaded with negative differential resistance elements and circuits, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, vol. 8455 (December, 2012), SPIE, ISSN 0277-786X, ISBN 9780819491725 [Gateway.cgi], [doi]  [abs]
168. Dwyer, JR; Smith, DM; Cummer, SA, High-energy atmospheric physics: Terrestrial gamma-ray flashes and related phenomena, Space Science Reviews, vol. 173 no. 1-4 (November, 2012), pp. 133-196, Springer Nature, ISSN 0038-6308 [doi]  [abs]
169. Li, D; Zigoneanu, L; Popa, B-I; Cummer, SA, Design of an acoustic metamaterial lens using genetic algorithms., The Journal of the Acoustical Society of America, vol. 132 no. 4 (October, 2012), pp. 2823-2833 [23039548], [doi]  [abs]
170. Popa, BI; Cummer, SA, Nonreciprocal active metamaterials, Physical Review B, vol. 85 no. 20 (May, 2012), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
171. Thompson, RT; Cummer, SA, Transformation optics, Advances in Imaging and Electron Physics, vol. 171 (January, 2012), pp. 195-295, Elsevier, ISSN 1076-5670 [doi]  [abs]
172. Lu, G; Cummer, SA; Blakeslee, RJ; Weiss, S; Beasley, WH, Lightning morphology and impulse charge moment change of high peak current negative strokes, Journal of Geophysical Research, vol. 117 no. 4 (January, 2012), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
173. Li, J; Cummer, S, Relationship between sprite streamer behavior and lightning-driven electric fields, Journal of Geophysical Research: Space Physics, vol. 117 no. 1 (January, 2012), American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
174. Haddad, MA; Rakov, VA; Cummer, SA, New measurements of lightning electric fields in Florida: Waveform characteristics, interaction with the ionosphere, and peak current estimates, Journal of Geophysical Research, vol. 117 no. 10 (January, 2012), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
175. Li, J; Cummer, S; Lu, G; Zigoneanu, L, Charge moment change and lightning-driven electric fields associated with negative sprites and halos, Journal of Geophysical Research: Space Physics, vol. 117 no. 9 (January, 2012), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
176. Hager, WW; Sonnenfeld, RG; Feng, W; Kanmae, T; Stenbaek-Nielsen, HC; McHarg, MG; Haaland, RK; Cummer, SA; Lu, G; Lapierre, JL, Charge rearrangement by sprites over a north Texas mesoscale convective system, Journal of Geophysical Research, vol. 117 no. 22 (January, 2012), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
177. Katko, AR; Shvets, G; Cummer, SA, Phase conjugation metamaterials: Particle design and imaging experiments, Journal of Optics (United Kingdom), vol. 14 no. 11 (January, 2012), pp. 114003-114003, IOP Publishing, ISSN 2040-8978 [doi]  [abs]
178. Popa, BI; Cummer, SA, Complex coordinates in transformation optics, Physical Review A, vol. 84 no. 6 (December, 2011), American Physical Society (APS), ISSN 1050-2947 [doi]  [abs]
179. Katko, AR; Hawkes, AM; Barrett, JP; Cummer, SA, RF limiter metamaterial using p-i-n diodes, Ieee Antennas and Wireless Propagation Letters, vol. 10 (December, 2011), pp. 1571-1574, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [doi]  [abs]
180. Cummer, SA; Lu, G; Li, J; Lyons, WA; Beasley, WH; MacGorman, DR; Krehbiel, PR; Rison, W; Cohen, MB; Van Der Velde, O; Lang, TJ; Rutledge, SA, Observations of lightning flash development associated with gigantic jets, 2011 30th Ursi General Assembly and Scientific Symposium, Ursigass 2011 (November, 2011), IEEE [doi]  [abs]
181. Cummer, SA; Popa, BI; Katko, A, Powered and active RF metamaterials, 2011 30th Ursi General Assembly and Scientific Symposium, Ursigass 2011 (November, 2011), IEEE [doi]  [abs]
182. Cummer, SA; Lu, G; Li, J; Blakeslee, RJ; Smith, DM; Dwyer, JR; Briggs, MS; Connaughton, V; Fishman, GJ, Detailed observations of lightning flashes and processes associated with terrestrial gamma ray flashes, 2011 30th Ursi General Assembly and Scientific Symposium, Ursigass 2011 (November, 2011), IEEE [doi]  [abs]
183. Katko, AR; Popa, BI; Barrett, JP; Hawkes, AM; Cummer, SA, Powered and nonlinear RF metamaterials, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, vol. 8093 (October, 2011), SPIE, ISSN 0277-786X [doi]  [abs]
184. Zigoneanu, L; Popa, BI; Cummer, SA, Design and measurements of a broadband two-dimensional acoustic lens, Physical Review B, vol. 84 no. 2 (July, 2011), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
185. Cummer, SA; Lu, G; Briggs, MS; Connaughton, V; Xiong, S; Fishman, GJ; Dwyer, JR, The lightning-TGF relationship on microsecond timescales, Geophysical Research Letters, vol. 38 no. 14 (July, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
186. Popa, BI; Cummer, SA, Homogeneous and compact acoustic ground cloaks, Physical Review B, vol. 83 no. 22 (June, 2011), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
187. Lu, G; Cummer, SA; Lyons, WA; Krehbiel, PR; Li, J; Rison, W; Thomas, RJ; Edens, HE; Stanley, MA; Beasley, W; MacGorman, DR; Van Der Velde, OA; Cohen, MB; Lang, TJ; Rutledge, SA, Lightning development associated with two negative gigantic jets, Geophysical Research Letters, vol. 38 no. 12 (June, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
188. Popa, B-I; Zigoneanu, L; Cummer, SA, Experimental acoustic ground cloak in air., Physical Review Letters, vol. 106 no. 25 (June, 2011), pp. 253901 [21770640], [doi]  [abs]
189. Smith, DM; Dwyer, JR; Hazelton, BJ; Grefenstette, BW; Martinez-Mckinney, GFM; Zhang, ZY; Lowell, AW; Kelley, NA; Splitt, ME; Lazarus, SM; Ulrich, W; Schaal, M; Saleh, ZH; Cramer, E; Rassoul, HK; Cummer, SA; Lu, G; Blakeslee, RJ, The rarity of terrestrial gamma-ray flashes, Geophysical Research Letters, vol. 38 no. 8 (April, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
190. Zigoneanu, L; Popa, BI; Starr, AF; Cummer, SA, Design and measurements of a broadband two-dimensional acoustic metamaterial with anisotropic effective mass density, Journal of Applied Physics, vol. 109 no. 5 (March, 2011), pp. 054906-054906, AIP Publishing, ISSN 0021-8979 [doi]  [abs]
191. Lu, G; Cummer, SA; Li, J; Han, F; Smith, DM; Grefenstette, BW, Characteristics of broadband lightning emissions associated with terrestrial gamma ray flashes, Journal of Geophysical Research: Space Physics, vol. 116 no. 3 (January, 2011), American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
192. Gamerota, WR; Cummer, SA; Li, J; Stenbaek-Nielsen, HC; Haaland, RK; McHarg, MG, Comparison of sprite initiation altitudes between observations and models, Journal of Geophysical Research: Space Physics, vol. 116 no. 2 (January, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
193. Li, J; Cummer, S, Estimation of electric charge in sprites from optical and radio observations, Journal of Geophysical Research: Space Physics, vol. 116 no. 1 (January, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
194. Han, F; Cummer, SA; Li, J; Lu, G, Daytime ionospheric D region sharpness derived from VLF radio atmospherics, Journal of Geophysical Research: Space Physics, vol. 116 no. 5 (January, 2011), American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
195. Lang, TJ; Li, J; Lyons, WA; Cummer, SA; Rutledge, SA; MacGorman, DR, Transient luminous events above two mesoscale convective systems: Charge moment change analysis, Journal of Geophysical Research: Space Physics, vol. 116 no. 10 (January, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
196. Smith, DM; Dwyer, JR; Hazelton, BJ; Grefenstette, BW; Martinez-Mckinney, GFM; Zhang, ZY; Lowell, AW; Kelley, NA; Splitt, ME; Lazarus, SM; Ulrich, W; Schaal, M; Saleh, ZH; Cramer, E; Rassoul, H; Cummer, SA; Lu, G; Shao, XM; Ho, C; Hamlin, T; Blakeslee, RJ; Heckman, S, A terrestrial gamma ray flash observed from an aircraft, Journal of Geophysical Research, vol. 116 no. 20 (January, 2011), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
197. Zhai, Y; Cummer, SA; Green, JL; Reinisch, BW; Kaiser, ML; Reiner, MJ; Goetz, K, Magnetospheric radio tomographic imaging with IMAGE and Wind, Journal of Geophysical Research: Space Physics, vol. 116 no. 12 (January, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
198. Neubert, T; Chanrion, O; Arnone, E; Zanotti, F; Cummer, S; Li, J; Füllekrug, M; Soula, S; Van Der Velde, O, The properties of a gigantic jet reflected in a simultaneous sprite: Observations interpreted by a model, Journal of Geophysical Research: Space Physics, vol. 116 no. 12 (January, 2011), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
199. Thompson, RT; Cummer, SA; Frauendiener, J, A completely covariant approach to transformation optics, Journal of Optics (United Kingdom), vol. 13 no. 2 (January, 2011), pp. 024008-024008, IOP Publishing, ISSN 2040-8978 [doi]  [abs]
200. Cummer, SA; Thompson, RT, Frequency conversion by exploiting time in transformation optics, Journal of Optics (United Kingdom), vol. 13 no. 2 (January, 2011), pp. 024007-024007, IOP Publishing, ISSN 2040-8978 [doi]  [abs]
201. Thompson, RT; Cummer, SA; Frauendiener, J, Generalized transformation optics of linear materials, Journal of Optics (United Kingdom), vol. 13 no. 5 (January, 2011), pp. 055105-055105, IOP Publishing, ISSN 2040-8978 [doi]  [abs]
202. Cummer, SA, Transformation acoustics, 17th International Congress on Sound and Vibration 2010, Icsv 2010, vol. 1 (December, 2010), pp. 197-202  [abs]
203. Popa, BI; Cummer, SA, Design of layered transformation-optics devices of arbitrary shape, Physical Review A, vol. 82 no. 3 (September, 2010), American Physical Society (APS), ISSN 1050-2947 [repository], [doi]  [abs]
204. Gu, S; Barrett, JP; Hand, TH; Popa, BI; Cummer, SA, A broadband low-reflection metamaterial absorber, Journal of Applied Physics, vol. 108 no. 6 (September, 2010), pp. 064913-064913, AIP Publishing, ISSN 0021-8979 [repository], [doi]  [abs]
205. Cohen, MB; Inan, US; Said, RK; Briggs, MS; Fishman, GJ; Connaughton, V; Cummer, SA, A lightning discharge producing a beam of relativistic electrons into space, Geophysical Research Letters, vol. 37 no. 18 (September, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [repository], [doi]  [abs]
206. Katko, AR; Gu, S; Barrett, JP; Popa, B-I; Shvets, G; Cummer, SA, Phase conjugation and negative refraction using nonlinear active metamaterials., Physical Review Letters, vol. 105 no. 12 (September, 2010), pp. 123905 [20867644], [doi]  [abs]
207. Sajuyigbe, S; Ross, M; Geren, P; Cummer, SA; Tanielian, MH; Smith, DR, Wide angle impedance matching metamaterials for waveguide-fed phased-array antennas, Iet Microwaves, Antennas & Propagation, vol. 4 no. 8 (August, 2010), pp. 1063-1072, Institution of Engineering and Technology (IET), ISSN 1751-8725 [doi]  [abs]
208. Chou, JK; Kuo, CL; Tsai, LY; Chen, AB; Su, HT; Hsu, RR; Cummer, SA; Li, J; Frey, HU; Mende, SB; Takahashi, Y; Lee, LC, Gigantic jets with negative and positive polarity streamers, Journal of Geophysical Research, vol. 115 no. A7 (July, 2010), American Geophysical Union (AGU), ISSN 0148-0227 [Gateway.cgi], [doi]
209. Lu, G; Blakeslee, RJ; Li, J; Smith, DM; Shao, XM; McCaul, EW; Buechler, DE; Christian, HJ; Hall, JM; Cummer, SA, Lightning mapping observation of a terrestrial gamma-ray flash, Geophysical Research Letters, vol. 37 no. 11 (June, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [repository], [doi]  [abs]
210. Hand, TH; Cummer, SA, Reconfigurable reflectarray using addressable metamaterials, Ieee Antennas and Wireless Propagation Letters, vol. 9 (March, 2010), pp. 70-74, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [doi]  [abs]
211. Thomas, JN; Solorzano, NN; Cummer, SA; Holzworth, RH, Polarity and energetics of inner core lightning in three intense North Atlantic hurricanes, Journal of Geophysical Research, vol. 115 no. A3 (March, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0148-0227 [Gateway.cgi], [doi]
212. Williams, ER; Lyons, WA; Hobara, Y; Mushtak, VC; Asencio, N; Boldi, R; Bór, J; Cummer, SA; Greenberg, E; Hayakaw, M; Holzworth, RH; Kotroni, V; Li, J; Morales, C; Nelson, TE; Price, C; Russell, B; Sato, M; Sátori, G; Shirahata, K; Takahashio, Y; Yamashitao, K, Ground-based detection of sprites and their parent lightning flashes over Africa during the 2006 AMMA campaign, Quarterly Journal of the Royal Meteorological Society, vol. 136 no. SUPPL. 1 (January, 2010), pp. 257-271, WILEY, ISSN 0035-9009 [doi]  [abs]
213. Popa, BL; Cummer, SA, Theory and design of practical metamaterials for acoustic cloaking, Asme International Mechanical Engineering Congress and Exposition, Proceedings, vol. 15 (January, 2010), pp. 113-114, ASME [doi]
214. Han, F; Cummer, SA, Midlatitude nighttime D region ionosphere variability on hourly to monthly time scales, Journal of Geophysical Research: Space Physics, vol. 115 no. 9 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
215. Han, F; Cummer, SA, Midlatitude daytime D region ionosphere variations measured from radio atmospherics, Journal of Geophysical Research: Space Physics, vol. 115 no. 10 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
216. São Sabbas, FT; Taylor, MJ; Pautet, PD; Bailey, M; Cummer, S; Azambuja, RR; Santiago, JPC; Thomas, JN; Pinto, O; Solorzano, NN; Schuch, NJ; Freitas, SR; Ferreira, NJ; Conforte, JC, Observations of prolific transient luminous event production above a mesoscale convective system in Argentina during the Sprite2006 Campaign in Brazil, Journal of Geophysical Research: Space Physics, vol. 115 no. 11 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
217. Van Der Velde, OA; Bór, J; Li, J; Cummer, SA; Arnone, E; Zanotti, F; Füllekrug, M; Haldoupis, C; Naitamor, S; Farges, T, Multi-instrumental observations of a positive gigantic jet produced by a winter thunderstorm in Europe, Journal of Geophysical Research, vol. 115 no. 24 (January, 2010), American Geophysical Union (AGU), ISSN 0148-0227 [repository], [doi]  [abs]
218. Rodger, CJ; Carson, BR; Cummer, SA; Gamble, RJ; Clilverd, MA; Green, JC; Sauvaud, JA; Parrot, M; Berthelier, JJ, Contrasting the efficiency of radiation belt losses caused by ducted and nonducted whistler-mode waves from ground-based transmitters, Journal of Geophysical Research: Space Physics, vol. 115 no. 12 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
219. Lang, TJ; Lyons, WA; Rutledge, SA; Meyer, JD; MacGorman, DR; Cummer, SA, Transient luminous events above two mesoscale convective systems: Storm structure and evolution, Journal of Geophysical Research: Space Physics, vol. 115 no. 5 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
220. Inan, US; Cummer, SA; Marshall, RA, A survey of ELF and VLF research on lightning-ionosphere interactions and causative discharges, Journal of Geophysical Research: Space Physics, vol. 115 no. 6 (January, 2010), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [repository], [doi]  [abs]
221. Ybarra, GA; Collins, LM; Huettel, LG; Coonley, KD; Massoud, HZ; Board, JA; Cummer, SA; Choudhury, RR; Gustafson, MR; Jokerst, NM; Brooke, MA; Willett, RM; Kim, J; Absher, MS, Integrated sensing and information processing theme-based redesign of the undergraduate electrical and computer engineering curriculum at Duke University, Advances in Engineering Education, vol. 2 no. 4 (2010), ISSN 1941-1766  [abs]
222. Lyons, WA; Stanley, MA; Meyer, JD; Nelson, TE; Rutledge, SA; Lang, TL; Cummer, SA, The meteorological and electrical structure of TLE-producing convective storms (December, 2009), pp. 387-415, Springer Netherlands [doi]  [abs]
223. Hand, TH; Cummer, SA, Controllable magnetic metamaterial using digitally addressable split-ring resonators, Ieee Antennas and Wireless Propagation Letters, vol. 8 (December, 2009), pp. 262-265, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [doi]  [abs]
224. Popa, BI; Cummer, SA, Design and characterization of broadband acoustic composite metamaterials, Physical Review B, vol. 80 no. 17 (November, 2009), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
225. Sajuyigbe, S; Cummer, SA; Smith, DR, Utilization of metamaterials for wide angle impedance matching (WAIM) in phased array antennas, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (November, 2009), IEEE, ISSN 1522-3965 [doi]
226. Hand, TH; Cummer, SA, A dynamic frequency selective surface using addressable metamaterials, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (November, 2009), IEEE, ISSN 1522-3965 [doi]
227. Cummer, SA; Kundtz, N; Popa, BI, Electromagnetic surface and line sources under coordinate transformations, Physical Review A, vol. 80 no. 3 (September, 2009), American Physical Society (APS), ISSN 1050-2947 [doi]  [abs]
228. Adachi, T; Cummer, SA; Li, J; Takahashi, Y; Hsu, RR; Su, HT; Chen, AB; Mende, SB; Frey, HU, Estimating lightning current moment waveforms from satellite optical measurements, Geophysical Research Letters, vol. 36 no. 18 (September, 2009), American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
229. Cummer, SA; Li, J; Han, F; Lu, G; Jaugey, N; Lyons, WA; Nelson, TE, Quantification of the troposphere-to-ionosphere charge transfer in a gigantic jet, Nature Geoscience, vol. 2 no. 9 (September, 2009), pp. 617-620, Springer Nature, ISSN 1752-0894 [doi]  [abs]
230. Lu, G; Cummer, SA; Li, J; Han, F; Blakeslee, RJ; Christian, HJ, Charge transfer and in-cloud structure of large-charge-moment positive lightning strokes in a mesoscale convective system, Geophysical Research Letters, vol. 36 no. 15 (August, 2009), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
231. Farrell, WM; Plaut, JJ; Cummer, SA; Gurnett, DA; Picardi, G; Watters, TR; Safaeinili, A, Is the Martian water table hidden from radar view?, Geophysical Research Letters, vol. 36 no. 15 (August, 2009), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
232. Yuan, Y; Popa, B-I; Cummer, SA, Zero loss magnetic metamaterials using powered active unit cells., Optics Express, vol. 17 no. 18 (August, 2009), pp. 16135-16143 [19724613], [doi]  [abs]
233. Popa, BI; Allen, J; Cummer, SA, Conformal array design with transformation electromagnetics, Applied Physics Letters, vol. 94 no. 24 (June, 2009), pp. 244102-244102, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
234. Allen, J; Kundtz, N; Roberts, DA; Cummer, SA; Smith, DR, Electromagnetic source transformations using superellipse equations, Applied Physics Letters, vol. 94 no. 19 (June, 2009), pp. 194101-194101, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
235. Li, J; Cummer, SA, Measurement of sprite streamer acceleration and deceleration, Geophysical Research Letters, vol. 36 no. 10 (May, 2009), pp. L10812, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
236. Cummer, SA; Liu, R; Cui, TJ, A rigorous and nonsingular two dimensional cloaking coordinate transformation, Journal of Applied Physics, vol. 105 no. 5 (March, 2009), pp. 056102-056102, AIP Publishing, ISSN 0021-8979 [doi]  [abs]
237. Zhai, Y; Cummer, SA, Fast tomographic reconstruction strategy for diffuse optical tomography., Optics Express, vol. 17 no. 7 (March, 2009), pp. 5285-5297 [19333294], [doi]  [abs]
238. Popa, BI; Cummer, SA, Cloaking with optimized homogeneous anisotropic layers, Physical Review A, vol. 79 no. 2 (February, 2009), American Physical Society (APS), ISSN 1050-2947 [doi]  [abs]
239. Hazelton, BJ; Grefenstette, BW; Smith, DM; Dwyer, JR; Shao, XM; Cummer, SA; Chronis, T; Lay, EH; Holzworth, RH, Spectral dependence of terrestrial gamma-ray flashes on source distance, Geophysical Research Letters, vol. 36 no. 1 (January, 2009), American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
240. Cummer, SA; Popa, BI, Electromagnetic source transformations and applications, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (January, 2009), IEEE, ISSN 1522-3965 [doi]
241. Kuo, CL; Chou, JK; Tsai, LY; Chen, AB; Su, HT; Hsu, RR; Cummer, SA; Frey, HU; Mende, SB; Takahashi, Y; Lee, LC, Discharge processes, electric field, and electron energy in ISUAL recorded gigantic jets, Journal of Geophysical Research: Space Physics, vol. 114 no. 4 (January, 2009), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
242. Hand, TH; Gollub, J; Sajuyigbe, S; Smith, DR; Cummer, SA, Characterization of complementary electric field coupled resonant surfaces, Applied Physics Letters, vol. 93 no. 21 (December, 2008), pp. 212504-212504, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
243. Kundtz, N; Roberts, DA; Allen, J; Cummer, S; Smith, DR, Optical source transformations., Optics Express, vol. 16 no. 26 (December, 2008), pp. 21215-21222 [19104551], [doi]  [abs]
244. Cummer, SA; Rahm, M; Schurig, D, Material parameters and vector scaling in transformation acoustics, New Journal of Physics, vol. 10 no. 11 (November, 2008), pp. 115025-115025, IOP Publishing, ISSN 1367-2630 [doi]  [abs]
245. Yuan, Y; Bingham, C; Tyler, T; Palit, S; Hand, TH; Padilla, WJ; Jokerst, NM; Cummer, SA, A dual-resonant terahertz metamaterial based on single-particle electric-field-coupled resonators, Applied Physics Letters, vol. 93 no. 19 (November, 2008), pp. 191110-191110, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
246. Ross, M; Cummer, SA; Nielsen, TK; Zhang, Y, Simultaneous remote electric and magnetic field measurements of lightning continuing currents, Journal of Geophysical Research, vol. 113 no. 20 (October, 2008), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
247. Li, J; Cummer, SA; Lyons, WA; Nelson, TE, Coordinated analysis of delayed sprites with high-speed images and remote electromagnetic fields, Journal of Geophysical Research, vol. 113 no. 20 (October, 2008), American Geophysical Union (AGU), ISSN 0148-0227 [repository], [doi]  [abs]
248. Hand, TH; Yu, Y; Palit, S; Bingham, C; Rahm, M; Smith, DR; Padilla, WJ; Jokerst, N; Cummer, SA, Dual-band planar electric THz metamaterial with resonator yield analysis, 2008 Conference on Quantum Electronics and Laser Science Conference on Lasers and Electro Optics, Cleo/Qels (September, 2008) [doi]  [abs]
249. Hand, TH; Yuan, Y; Palit, S; Bingham, C; Rahm, M; Smith, DR; Padilla, WJ; Jokerst, N; Cummer, SA, Dual-band planar electric THz metamaterial with resonator yield analysis, Conference on Quantum Electronics and Laser Science (Qels) Technical Digest Series (September, 2008) [doi]  [abs]
250. Erentok, A; Ziolkowski, RW; Nielsen, JA; Greegor, RB; Parazzoli, CG; Tanielian, MH; Cummer, SA; Popa, BI; Hand, T; Vier, DC; Schultz, S, Lumped element-based, highly sub-wavelength, negative index metamaterials at UHF frequencies, Journal of Applied Physics, vol. 104 no. 3 (August, 2008), pp. 034901-034901, AIP Publishing, ISSN 0021-8979 [doi]  [abs]
251. Lyons, WA; Cummer, SA; Stanley, MA; Huffines, GR; Wiens, KC; Nelson, TE, Supercelles and sprites, Bulletin of the American Meteorological Society, vol. 89 no. 8 (August, 2008), pp. 1165-1174, ISSN 0739-0572 [doi]  [abs]
252. Taylor, MJ; Bailey, MA; Pautet, PD; Cummer, SA; Jaugey, N; Thomas, JN; Solorzano, NN; Sao Sabbas, F; Holzworth, RH; Pinto, O; Schuch, NJ, Rare measurements of a sprite with halo event driven by a negative lightning discharge over Argentina, Geophysical Research Letters, vol. 35 no. 14 (July, 2008), American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
253. Yuan, Y; Bingham, C; Tyler, T; Palit, S; Hand, TH; Padilla, WJ; Smith, DR; Jokerst, NM; Cummer, SA, Dual-band planar electric metamaterial in the terahertz regime., Optics Express, vol. 16 no. 13 (June, 2008), pp. 9746-9752, ISSN 1094-4087 [18575543], [doi]  [abs]
254. Popa, B-I; Cummer, SA, Compact dielectric particles as a building block for low-loss magnetic metamaterials., Physical Review Letters, vol. 100 no. 20 (May, 2008), pp. 207401, ISSN 0031-9007 [18518576], [doi]  [abs]
255. Farrell, WM; Clifford, SM; Milkovich, SM; Plaut, JJ; Leuschen, CJ; Picardi, G; Gurnett, DA; Watters, TR; Safaeinili, A; Ivanov, AB; Phillips, RJ; Stofan, ER; Heggy, E; Cummer, SA; Espley, JR, MARSIS subsurface radar investigations of the South Polar reentrant Chasma Australe, Journal of Geophysical Research, vol. 113 no. 4 (April, 2008), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
256. Hand, TH; Cummer, SA, Frequency tunable electromagnetic metamaterial using ferroelectric loaded split rings, Journal of Applied Physics, vol. 103 no. 6 (April, 2008), pp. 066105-066105, AIP Publishing, ISSN 0021-8979 [doi]  [abs]
257. Rahm, M; Schurig, D; Roberts, DA; Cummer, SA; Smith, DR; Pendry, JB, Design of electromagnetic cloaks and concentrators using form-invariant coordinate transformations of Maxwell's equations, Photonics and Nanostructures Fundamentals and Applications, vol. 6 no. 1 (April, 2008), pp. 87-95, Elsevier BV, ISSN 1569-4410 [doi]  [abs]
258. Rahm, M; Cummer, SA; Schurig, D; Pendry, JB; Smith, DR, Optical design of reflectionless complex media by finite embedded coordinate transformations., Physical Review Letters, vol. 100 no. 6 (February, 2008), pp. 063903, ISSN 0031-9007 [0711.1846v2], [doi]  [abs]
259. Hand, TH; Yuan, Y; Palit, S; Bingham, C; Rahm, M; Smith, DR; Padilla, WJ; Jokerst, N; Cummer, SA, Dual-band planar electric THz metamaterial with resonator yield analysis, Optics Infobase Conference Papers (January, 2008)  [abs]
260. Hand, TH; Yuan, Y; Palit, S; Bingham, C; Rahm, M; Smith, DR; Padilla, WJ; Jokerst, N; Cummer, SA, Dual-band planar electric THz metamaterial with resonator yield analysis, Optics Infobase Conference Papers (January, 2008)  [abs]
261. Cummer, SA; Popa, BI; Hand, TH, Q-based design equations and loss limits for resonant metamaterials and experimental validation, Ieee Transactions on Antennas and Propagation, vol. 56 no. 1 (January, 2008), pp. 127-132, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-926X [doi]  [abs]
262. Cummer, SA; Popa, BI; Schurig, D; Smith, DR; Pendry, J; Rahm, M; Starr, A, Scattering theory derivation of a 3D acoustic cloaking shell, Physical Review Letters, vol. 1 no. 2 (January, 2008), pp. 024301, ISSN 0031-9007 [18232873], [doi]  [abs]
263. Liu, R; Cheng, Q; Hand, T; Mock, JJ; Cui, TJ; Cummer, SA; Smith, DR, Experimental demonstration of electromagnetic tunneling through an epsilon-near-zero metamaterial at microwave frequencies, Physical Review Letters, vol. 1 no. 2 (January, 2008), pp. 023903, ISSN 0031-9007 [18232869], [doi]  [abs]
264. Cummer, SA, Active and Tunable RF Metamaterials, edited by Cui, TJ; Smith, DR, Proceedings of the 2008 International Workshop on Metamaterials (January, 2008), pp. 9-9, IEEE, ISBN 978-1-4244-2608-9 [Gateway.cgi]
265. Liu, R; Cheng, Q; Hand, T; Mock, JJ; Cui, TJ; Cummer, SA; Smith, DR, Experimental demonstration of electromagnetic tunneling through an epsilon-near-zero metamaterial at microwave frequencies., Physical Review Letters, vol. 100 no. 2 (January, 2008), pp. 023903, ISSN 0031-9007 [18232869], [doi]  [abs]
266. Cummer, SA; Popa, B-I; Schurig, D; Smith, DR; Pendry, J; Rahm, M; Starr, A, Scattering theory derivation of a 3D acoustic cloaking shell., Physical Review Letters, vol. 100 no. 2 (January, 2008), pp. 024301, ISSN 0031-9007 [18232873], [doi]  [abs]
267. Popa, BI; Cummer, SA, Design and experimental demonstration of active RF metamaterials, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (December, 2007), pp. 2546-2549, IEEE, ISSN 1522-3965 [doi]
268. Parazzoli, CG; Greegor, RB; Tanielian, MH; Smith, DR; Cummer, S; Schurig, D; Ziolkowski, R, Applications of metamaterials in the GHz frequency domain, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (December, 2007), pp. 1152-1155, IEEE, ISSN 1522-3965 [doi]
269. Hand, T; Cummer, S, Characterization of tunable metamaterial elements using MEMS switches, Ieee Antennas and Wireless Propagation Letters, vol. 6 (December, 2007), pp. 401-404, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [doi]  [abs]
270. Erentok, A; Ziolkowski, RW; Nielsen, JA; Greegor, RB; Parazzoli, CG; Tanielian, MH; Cummer, SA; Popa, BI; Hand, T; Vier, DC; Schultz, S, Low frequency lumped element-based negative index metamaterial, Applied Physics Letters, vol. 91 no. 18 (November, 2007), pp. 184104-184104, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
271. Kuo, CL; Chen, AB; Lee, YJ; Tsai, LY; Chou, RK; Hsu, RR; Su, HT; Lee, LC; Cummer, SA; Frey, HU; Mende, SB; Takahashi, Y; Fukunishi, H, Modeling elves observed by FORMOSAT-2 satellite, Journal of Geophysical Research: Space Physics, vol. 112 no. 11 (November, 2007), pp. n/a-n/a, American Geophysical Union (AGU) [doi]  [abs]
272. Gollub, J; Hand, T; Sajuyigbe, S; Mendonca, S; Cummer, S; Smith, DR, Characterizing the effects of disorder in metamaterial structures, Applied Physics Letters, vol. 91 no. 16 (October, 2007), pp. 162907-162907, AIP Publishing, ISSN 0003-6951 [doi]  [abs]
273. van der Velde, OA; Lyons, WA; Nelson, TE; Cummer, SA; Li, J; Bunnell, J, Analysis of the first gigantic jet recorded over continental North America, Journal of Geophysical Research, vol. 112 no. 20 (October, 2007), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
274. Popa, BI; Cummer, SA, An architecture for active metamaterial particles and experimental validation at RF, Microwave and Optical Technology Letters, vol. 49 no. 10 (October, 2007), pp. 2574-2577, WILEY, ISSN 0895-2477 [doi]  [abs]
275. Frey, HU; Mende, SB; Cummer, SA; Li, J; Adachi, T; Fukunishi, H; Takahashi, Y; Chen, AB; Hsu, RR; Su, HT; Chang, YS, Halos generated by negative cloud-to-ground lightning, Geophysical Research Letters, vol. 34 no. 18 (September, 2007), American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
276. Hu, W; Cummer, SA; Lyons, WA, Testing sprite initiation theory using lightning measurements and modeled electromagnetic fields, Journal of Geophysical Research, vol. 112 no. 13 (July, 2007), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
277. Hand, T; Cummer, SA; Engheta, N, The measured electric field spatial distribution within a metamaterial subwavelength cavity resonator, Ieee Transactions on Antennas and Propagation, vol. 55 no. 6 II (June, 2007), pp. 1781-1788, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-926X [doi]  [abs]
278. Cheng, Z; Cummer, SA; Su, HT; Hsu, RR, Broadband very low frequency measurement of D region ionospheric perturbations caused by lightning electromagnetic pulses, Journal of Geophysical Research: Space Physics, vol. 112 no. 6 (June, 2007), pp. n/a-n/a, American Geophysical Union (AGU), ISSN 2169-9402 [doi]  [abs]
279. Thomas, JN; Taylor, MJ; Pautet, D; Bailey, M; Solorzano, NN; Holzworth, RH; McCarthy, MP; Kokorowski, M; Sao Sabbas, F; Pinlo, O; Cummer, SA; Jaugey, N; Li, J; Schuch, NJ, A very active sprite-producing storm observed over Argentina, Eos, vol. 88 no. 10 (March, 2007), pp. 117-117, American Geophysical Union (AGU), ISSN 0096-3941 [doi]
280. Cummer, SA; Schurig, D, One path to acoustic cloaking, New Journal of Physics, vol. 9 no. 3 (March, 2007), pp. 45-45, IOP Publishing, ISSN 1367-2630 [045], [doi]  [abs]
281. Popa, B-I; Cummer, SA, Design and experimental demonstration of active RE metamaterials, Ieee Antennas and Propagation Society, Ap S International Symposium (Digest) (January, 2007), pp. 2339-2342, IEEE, ISSN 1522-3965, ISBN 978-1-4244-0877-1 [Gateway.cgi]
282. Brown, A; Ybarra, G; Massoud, H; Board, J; Holmes, J; Coonley, K; Collins, L; Huettel, L; Gustafson, M; Cummer, S, Redesign of the core curriculum at Duke University, Asee Annual Conference and Exposition, Conference Proceedings (December, 2006)
283. Farrell, WM; Marshall, JR; Cummer, SA; Delory, GT; Desch, MD, A model of the ULF magnetic and electric field generated from a dust devil, Journal of Geophysical Research, vol. 111 no. 11 (November, 2006), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
284. Schurig, D; Mock, JJ; Justice, BJ; Cummer, SA; Pendry, JB; Starr, AF; Smith, DR, Metamaterial electromagnetic cloak at microwave frequencies., Science (New York, N.Y.), vol. 314 no. 5801 (November, 2006), pp. 977-980 [17053110], [doi]  [abs]
285. Cummer, SA; Frey, HU; Mende, SB; Hsu, RR; Su, HT; Chen, AB; Fukunishi, H; Takahashi, Y, Simultaneous radio and satellite optical measurements of high-altitude sprite current and lightning continuing current, Journal of Geophysical Research: Space Physics, vol. 111 no. 10 (October, 2006), pp. 6 pp. -, American Geophysical Union (AGU), ISSN 2169-9402 [2006JA011809], [doi]  [abs]
286. Popa, B-I; Cummer, SA, Derivation of effective parameters of magnetic metamaterials composed of passive resonant LC inclusions (September, 2006) [0609745v1]  [abs]
287. Cummer, SA; Popa, B-I; Schurig, D; Smith, DR; Pendry, J, Full-wave simulations of electromagnetic cloaking structures., Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, vol. 74 no. 3 Pt 2 (September, 2006), pp. 036621, ISSN 1539-3755 [17025778], [doi]  [abs]
288. Zhai, Y; Cummer, SA; Farrell, WM, Quasi-electrostatic field analysis and simulation of Martian and terrestrial dust devils, Journal of Geophysical Research, vol. 111 no. 6 (June, 2006), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
289. Xu, Y; Cummer, SA; Farrell, WM, Application of an orbital radar sounder model to detecting Martian polar subsurface features, Journal of Geophysical Research, vol. 111 no. 6 (June, 2006), American Geophysical Union (AGU), ISSN 0148-0227 [doi]  [abs]
290. Delory, GT; Farrell, WM; Atreya, SK; Renno, NO; Wong, A-S; Cummer, SA; Sentman, DD; Marshall, JR; Rafkin, SCR; Catling, DC, Oxidant enhancement in martian dust devils and storms: storm electric fields and electron dissociative attachment., Astrobiology, vol. 6 no. 3 (June, 2006), pp. 451-462, ISSN 1531-1074 [16805701], [doi]  [abs]
291. Atreya, SK; Wong, A-S; Renno, NO; Farrell, WM; Delory, GT; Sentman, DD; Cummer, SA; Marshall, JR; Rafkin, SCR; Catling, DC, Oxidant enhancement in martian dust devils and storms: implications for life and habitability., Astrobiology, vol. 6 no. 3 (June, 2006), pp. 439-450, ISSN 1531-1074 [16805700], [doi]  [abs]
292. Cheng, Z; Cummer, SA; Baker, DN; Kanekal, SG, Nighttime D region electron density profiles and variabilities inferred from broadband measurements using VLF radio emissions from lightning, Journal of Geophysical Research: Space Physics, vol. 111 no. 5 (May, 2006), pp. 9 pp. -, American Geophysical Union (AGU), ISSN 2169-9402 [2005JA011308], [doi]  [abs]
293. Hu, W; Cummer, SA, An FDTD model for low and high altitude lightning-generated EM fields, Ieee Transactions on Antennas and Propagation, vol. 54 no. 5 (May, 2006), pp. 1513-1522, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-926X [TAP.2006.874336], [doi]  [abs]
294. Zhai, Y; Cummer, SA, An orthogonal projection and regularization technique for magnetospheric radio tomography, Journal of Geophysical Research: Space Physics, vol. 111 no. 3 (March, 2006), pp. 11 pp. -, American Geophysical Union (AGU), ISSN 2169-9402 [2005JA011039], [doi]  [abs]
295. Farrell, WM; Renno, N; Delory, GT; Cummer, SA; Marshall, JR, Integration of electrostatic and fluid dynamics within a dust devil, Journal of Geophysical Research, vol. 111 no. 1 (January, 2006), pp. 10 pp. -, American Geophysical Union (AGU), ISSN 0148-0227 [2005JE002527], [doi]  [abs]
296. Popa, B-I; Cummer, SA, Direct measurement of evanescent wave enhancement inside passive metamaterials., Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics, vol. 73 no. 1 Pt 2 (January, 2006), pp. 016617, ISSN 1539-3755 [16486305], [doi]  [abs]
297. Cummer, SA, Measurements of lightning parameters from remote electromagnetic fields, edited by Fullekrug, M; Mareev, EA; Rycroft, MJ, Sprites, Elves and Intense Lightning Discharges, vol. 225 (January, 2006), pp. 191-+, SPRINGER, ISSN 1568-2609, ISBN 978-1-4020-4627-8 [Gateway.cgi]
298. Brown, A; Ybarra, G; Massoud, H; Board, J; Holmes, J; Coonley, K; Collins, L; Huettel, L; Gustafson, M; Cummer, S, Redesign of the core curriculum at Duke University, Asee Annual Conference and Exposition, Conference Proceedings (January, 2006)
299. Cummer, SA; Jaugey, N; Li, J; Lyons, WA; Nelson, TE; Gerken, EA, Submillisecond imaging of sprite development and structure, Geophysical Research Letters, vol. 33 no. 4 (2006), pp. 04104, American Geophysical Union (AGU), ISSN 0094-8276 [2005GL024969], [doi]  [abs]
300. Lyons, WA; Cummer, SA, Lightning characteristics of the aurora, NE record hailstone-producing supercell of 22-23 June 2003 during BAMEX, 85th Ams Annual Meeting, American Meteorological Society Combined Preprints (December, 2005), pp. 5685-5690, San Diego, CA, United States
301. Popa, BI; Cummer, SA, Determining the effective electromagnetic properties of negative-refractive-index metamaterials from internal fields, Physical Review B, vol. 72 no. 16 (October, 2005), American Physical Society (APS), ISSN 1098-0121 [doi]  [abs]
302. Frey, HU; Mende, SB; Cummer, SA; Chen, AB; Hsu, RR; Su, HT; Chang, YS; Adachi, T; Fukunishi, H; Takahashi, Y, Beta-type stepped leader of elve-producing lightning, Geophysical Research Letters, vol. 32 no. 13 (July, 2005), pp. 1-4, American Geophysical Union (AGU) [2005GL023080], [doi]  [abs]
303. Zhai, Y; Cummer, SA, A flexible and robust direct reconstruction method for magnetospheric radio tomography, Radio Science, vol. 40 no. 3 (May, 2005), pp. n/a-n/a, American Geophysical Union (AGU) [2004RS003100], [doi]  [abs]
304. Cummer, SA; Zhai, Y; Hu, W; Smith, DM; Lopez, LI; Stanley, MA, Measurements and implications of the relationship between lightning and terrestrial gamma ray flashes, Geophysical Research Letters, vol. 32 no. 8 (April, 2005), pp. 1-5, American Geophysical Union (AGU) [2005GL022778], [doi]  [abs]
305. Cheng, Z; Cummer, SA, Broadband VLF measurements of lightning-induced ionospheric perturbations, Geophysical Research Letters, vol. 32 no. 8 (April, 2005), pp. 1-4, American Geophysical Union (AGU) [2004GL022187], [doi]  [abs]
306. Cummer, SA; Lyons, WA, Implications of lightning charge moment changes for sprite initiation, Journal of Geophysical Research: Space Physics, vol. 110 no. A4 (January, 2005), pp. 9 pp. -, American Geophysical Union (AGU), ISSN 2169-9402 [2004JA010812], [doi]  [abs]
307. Collins, LM; Huettel, LG; Brown, AS; Ybarra, GA; Holmes, JS; Board, JA; Cummer, SA; Gustafson, MR; Kim, J; Massoud, HZ, Theme-based redesign of the duke university ECE curriculum: The first steps, Asee Annual Conference and Exposition, Conference Proceedings (2005), pp. 14313-14326, Portland, OR, United States  [abs]
308. Hu, W; Cummer, SA, The nearly perfectly matched layer is a perfectly matched layer, Ieee Antennas and Wireless Propagation Letters, vol. 3 no. 1 (December, 2004), pp. 137-140, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [LAWP.2004.831077], [doi]  [abs]
309. Cummer, SA, Perfectly matched layer behavior in negative refractive index materials, Ieee Antennas and Wireless Propagation Letters, vol. 3 no. 1 (December, 2004), pp. 172-175, Institute of Electrical and Electronics Engineers (IEEE), ISSN 1536-1225 [LAWP.2004.833710], [doi]  [abs]
310. Antunovic, M; Cummer, SA, Event driven adaptive filtering, Proceedings of the Mediterranean Electrotechnical Conference Melecon, vol. 1 (November, 2004), pp. 251-254, IEEE, Dubrovnik, Croatia [doi]  [abs]
311. Cummer, SA; Popa, BL, Wave fields measured inside a negative refractive index metamaterial, Applied Physics Letters, vol. 85 no. 20 (November, 2004), pp. 4564-4566, AIP Publishing, ISSN 0003-6951 [1.1823595], [doi]  [abs]
312. Farrell, WM; Smith, PH; Delory, GT; Hillard, GB; Marshall, JR; Catling, D; Hecht, M; Tratt, DM; Renno, N; Desch, MD; Cummer, SA; Houser, JG; Johnson, B, Electric and magnetic signatures of dust devils from the 2000-2001 MATADOR desert tests, Journal of Geophysical Research, vol. 109 no. 3 (March, 2004), pp. E03004 1-13 [doi]  [abs]
313. Cummer, SA; Lyons, WA, Lightning charge moment changes in U.S. High Plains thunderstorms, Geophysical Research Letters, vol. 31 no. 5 (March, 2004), pp. n/a-n/a, American Geophysical Union (AGU) [2003GL019043], [doi]  [abs]
314. Antunovic, M. and Cummer, S.A., Event driven adaptive filtering, Proceedings of the 12th IEEE Mediterranean Electrotechnical Conference (IEEE Cat. No.04CH37521), vol. Vol.1 (2004), pp. 251 - 4, Dubrovnik, Croatia [MELCON.2004.1346821]  [abs]
315. Antunovic, M; Cummer, SA, Adaptive filter for event-based signal extraction, Automatika (Croatia), vol. 45 no. 3-4 (2004), pp. 129-135  [abs]
316. Farrell, WM; Delory, GT; Cummer, SA; Marshall, JR, A simple electrodynamic model of a dust devil, Geophysical Research Letters, vol. 30 no. 20 (October, 2003), pp. n/a-n/a, American Geophysical Union (AGU) [2003GL017606], [doi]  [abs]
317. Lyons, WA; Nelson, TE; Williams, ER; Cummer, SA; Stanley, MA, Characteristics of sprite-producing positive cloud-to-ground lightning during the 19 July 2000 STEPS mesoscale convective systems, Monthly Weather Review, vol. 131 no. 10 (October, 2003), pp. 2417-2427, American Meteorological Society [1520-0493(2003)131<2417:COSPCL>2.0.CO;2], [doi]  [abs]
318. Xu, Y; Cummer, SA, Applying the nonuniform FFT to the parabolic equation split-step algorithm for high frequency propagation modeling, Ap S International Symposium (Digest) (Ieee Antennas and Propagation Society), vol. 2 (September, 2003), pp. 598-601, Columbus, OH, United States [APS.2003.1219308]  [abs]
319. Hu, W; Cummer, SA, A new FDTD model for lightning generated EM wave simulation, Ap S International Symposium (Digest) (Ieee Antennas and Propagation Society), vol. 3 (September, 2003), pp. 1061-1064, Columbus, OH, United States [APS.2003.1220094]  [abs]
320. Cummer, SA, Dynamics of causal beam refraction in negative refractive index materials, Applied Physics Letters, vol. 82 no. 13 (March, 2003), pp. 2008-2010, AIP Publishing [doi]  [abs]
321. Cummer, SA, Simulated causal subwavelength focusing by a negative refractive index slab, Applied Physics Letters, vol. 82 no. 10 (March, 2003), pp. 1503-1505, AIP Publishing [1.1554778], [doi]  [abs]
322. Cummer, SA, A simple, nearly perfectly matched layer for general electromagnetic media, Ieee Microwave and Wireless Components Letters, vol. 13 no. 3 (March, 2003), pp. 128-130, Institute of Electrical and Electronics Engineers (IEEE) [LMWC.2003.810124], [doi]  [abs]
323. Cummer, SA; Green, JL; Reinisch, BW; Fung, SF; Kaiser, ML; Pickett, JS; Christopher, I; Mutel, R; Gurnett, DA; Escoubet, CP, Advances in magnetospheric radio wave analysis and tomography, edited by Lui, ATY; Treumann, RA, Advances in Space Research, vol. 32 no. 3 (January, 2003), pp. 329-336, PERGAMON-ELSEVIER SCIENCE LTD, ISSN 0273-1177 [Gateway.cgi], [doi]  [abs]
324. Cummer, SA, Current moment in sprite-producing lightning, Journal of Atmospheric and Solar Terrestrial Physics, vol. 65 no. 5 (January, 2003), pp. 499-508, Elsevier BV [S1364-6826(02)00318-8], [doi]  [abs]
325. Barros Ana, P; Lang Timothy, J, Monitoring the monsoon in the Himalayas: Observations in Central Nepal, June 2001, Monthly Weather Review, vol. 131 no. 7 (2003), pp. 1408-1427 [1520-0493(2003)1312.0.CO;2], [doi]  [abs]
326. Hu, W; Cummer, SA; Lyons, WA; Nelson, TE, Lightning charge moment changes for the initiation of sprites, Geophysical Research Letters, vol. 29 no. 8 (April, 2002), pp. 120-1-120-4, American Geophysical Union (AGU), ISSN 0094-8276 [doi]  [abs]
327. Østgaard, N; Stadsnes, J; Bjordal, J; Germany, GA; Vondrak, RR; Parks, GK; Cummer, SA; Chenette, DL; Pronko, JG, Auroral electron distributions derived from combined UV and X-ray emissions, Journal of Geophysical Research: Space Physics, vol. 106 no. A11 (November, 2001), pp. 26081-26089, American Geophysical Union (AGU), ISSN 2169-9402 [2001JA000031], [doi]  [abs]
328. Cummer, SA; Reiner, MJ; Reinisch, BW; Kaiser, ML; Green, JL; Benson, RF; Manning, R; Goetz, K, A test magnetospheric radio tomographic imaging with IMAGE and WIND, Geophysical Research Letters, vol. 28 no. 6 (March, 2001), pp. 1131-1134, American Geophysical Union (AGU) [2000GL012683], [doi]  [abs]
329. Cummer, SA; Füllekrug, M, Unusually intense continuing current in lightning produces delayed mesospheric breakdown, Geophysical Research Letters, vol. 28 no. 3 (February, 2001), pp. 495-498, American Geophysical Union (AGU), ISSN 0094-8276 [2000GL012214], [doi]  [abs]
330. Cummer, SA; Inan, US, Ionospheric E region remote sensing with ELF radio atmospherics, Radio Science, vol. 35 no. 6 (November, 2000), pp. 1437-1444, American Geophysical Union (AGU) [2000RS002335], [doi]  [abs]
331. Cummer, SA, Modeling electromagnetic propagation in the Earth-ionosphere waveguide, Ieee Transactions on Antennas and Propagation, vol. 48 no. 9 (September, 2000), pp. 1420-1429, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-926X [8.898776], [doi]  [abs]
332. Østgaard, N; Stadsnes, J; Bjordal, J; Vondrak, RR; Cummer, SA; Chenette, DL; Schulz, M; Pronko, JG, Cause of the localized maximum of X-ray emission in the morning sector: A comparison with electron measurements, Journal of Geophysical Research: Space Physics, vol. 105 no. A9 (September, 2000), pp. 20869-20883, American Geophysical Union (AGU), ISSN 2169-9402 [1999JA000354], [doi]  [abs]
333. Stanley, M; Brook, M; Krehbiel, P; Cummer, SA, Detection of daytime sprites via a unique sprite ELF signature, Geophysical Research Letters, vol. 27 no. 6 (March, 2000), pp. 871-874, American Geophysical Union (AGU), ISSN 0094-8276 [1999GL010769], [doi]  [abs]
334. Cummer, SA; Inan, US, Modeling ELF radio atmospheric propagation and extracting lightning currents from ELF observations, Radio Science, vol. 35 no. 2 (March, 2000), pp. 385-394, American Geophysical Union (AGU) [doi]  [abs]
335. Cummer, SA; Vondrak, RR; Østgaard, N; Stadsnes, J; Bjordal, J; Chenette, DL; Brittnacher, MJ; Parks, GK; Sigwarth, JB; Frank, LA, Global multispectral auroral imaging of an isolated substorm, Geophysical Research Letters, vol. 27 no. 5 (March, 2000), pp. 637-640, American Geophysical Union (AGU) [1999GL003678], [doi]  [abs]
336. Cummer, SA; Vondrak, RR; Ostgaard, N; Stadsnes, J; Bjordal, J; Chenette, DL; Brittnacher, MJ; Parks, GK; Sigwarth, JB; Frank, LA, Global multispectral auroral imaging of an isolated substorm, Geophysical Research Letters, vol. 27 no. 5 (March, 2000), pp. 637-640, American Geophysical Union (AGU) [doi]  [abs]
337. Østgaard, N; Stadsnes, J; Bjordal, J; Vondrak, RR; Cummer, SA; Chenette, DL; Schulz, M; Parks, GK; Brittnacher, MJ; McKenzie, DL; Pronko, JG, Global X-ray emission during an isolated substorm - A case study, Journal of Atmospheric and Solar Terrestrial Physics, vol. 62 no. 10 (January, 2000), pp. 889-900, Elsevier BV [S1364-6826(00)00034-1], [doi]  [abs]
338. Cummer, SA; Vondrak, RR; Pfaff, RF; Gierloev, JW; Carlson, CW; Ergun, RE; Peria, WJ; Elphic, RC; Strangeway, RJ; Sigwarth, JB; Frank, LA, Auroral surge currents and electrodynamics with FAST and VIS, Geophysical Monograph Series, vol. 118 (January, 2000), pp. 191-197, American Geophysical Union, ISSN 0065-8448, ISBN 9780875909769 [Gateway.cgi], [doi]  [abs]
339. Gjerloev, JW; Friis-Christensen, E; Hoffman, RA; Cummer, SA, The Harang discontinuity in auroral substorms, Geophysical Monograph Series, vol. 118 (January, 2000), pp. 209-216, American Geophysical Union, ISSN 0065-8448, ISBN 9780875909769 [Gateway.cgi], [doi]  [abs]
340. Barrington-Leigh, CP; Inan, US; Stanley, M; Cummer, SA, Sprites triggered by negative lightning discharges, Geophysical Research Letters, vol. 26 no. 24 (December, 1999), pp. 3605-3608, American Geophysical Union (AGU) [1999GL010692], [doi]  [abs]
341. Cummer, SA; Stanley, M, Submillisecond resolution lightning currents and sprite development: Observations and implications, Geophysical Research Letters, vol. 26 no. 20 (October, 1999), pp. 3205-3208, American Geophysical Union (AGU) [1999GL003635], [doi]  [abs]
342. Cummer, SA; Farrell, WM, Radio atmospheric propagation on Mars and potential remote sensing applications, Journal of Geophysical Research, vol. 104 no. E6 (June, 1999), pp. 14149-14157, American Geophysical Union (AGU) [1998JE000622], [doi]  [abs]
343. Østgaard, N; Stadsnes, J; Bjordal, J; Vondrak, RR; Cummer, SA; Chenette, DL; Parks, GK; Brittnacher, MJ; McKenzie, DL, Global-scale electron precipitation features seen in UV and X rays during substorms, Journal of Geophysical Research: Space Physics, vol. 104 no. A5 (May, 1999), pp. 10191-10204, American Geophysical Union (AGU), ISSN 2169-9402 [1999JA900004], [doi]  [abs]
344. Farrell, WM; Kaiser, ML; Desch, MD; Houser, JG; Cummer, SA; Wilt, DM; Landis, GA, Detecting electrical activity from Martian dust storms, Journal of Geophysical Research, vol. 104 no. E2 (February, 1999), pp. 3795-3801, American Geophysical Union (AGU) [98JE02821], [doi]  [abs]
345. Cummer, SA; Inan, US; Bell, TF; Barrington-Leigh, CP, ELF radiation produced by electrical currents in sprites, Geophysical Research Letters, vol. 25 no. 8 (April, 1998), pp. 1281-1284, American Geophysical Union (AGU) [98GL50937], [doi]  [abs]
346. Cummer, SA; Inan, US, Erratum: Measurement of charge transfer in spriteproducing lightning using ELF radio atmospherics (Geophysical Research Letters (1998) 24:14 (1731-1734)), Geophysical Research Letters, vol. 25 no. 6 (March, 1998), pp. 901, American Geophysical Union (AGU), ISSN 0094-8276 [Gateway.cgi], [doi]
347. Foster, JC; Cummer, S; Inan, US, Midlatitude particle and electric field effects at the onset of the November 1993 geomagnetic storm, Journal of Geophysical Research: Space Physics, vol. 103 no. A11 (January, 1998), pp. 26359-26366, ISSN 2169-9402 [doi]  [abs]
348. Cummer, SA; Inan, US; Bell, TF, Ionospheric D region remote sensing using VLF radio atmospherics, Radio Science, vol. 33 no. 6 (January, 1998), pp. 1781-1792, American Geophysical Union (AGU) [98RS02381], [doi]  [abs]
349. Cummer, SA, An Analysis of New and Existing FDTD methods for isotropie cold plasma and a method for improving their accuracy, Ieee Transactions on Antennas and Propagation, vol. 45 no. 3 (December, 1997), pp. 392-400, Institute of Electrical and Electronics Engineers (IEEE), ISSN 0018-926X [8.558654], [doi]  [abs]
350. Kelley, MC; Baker, SD; Holzworth, RH; Argo, P; Cummer, SA, LF and MF observations of the lightning electromagnetic pulse at ionospheric altitudes, Geophysical Research Letters, vol. 24 no. 9 (January, 1997), pp. 1111-1114, American Geophysical Union (AGU), ISSN 0094-8276 [97GL00991], [doi]  [abs]
351. Cummer, SA, VLF remote sensing of high-energy auroral particle precipitation, Journal of Geophysical Research, vol. 102 no. A4 (January, 1997), pp. 7477-7484, American Geophysical Union (AGU), ISSN 0148-0227 [96JA03721], [doi]  [abs]
352. Cummer, SA; Inan, US, Measurement of charge transfer in sprite-producing lightning using ELF radio atmospherics, Geophysical Research Letters, vol. 24 no. 14 (January, 1997), pp. 1731-1734, American Geophysical Union (AGU) [97GL51791], [doi]  [abs]
353. Cummer, SA; Bell, TF; Inan, US; Zanetti, LJ, VLF remote sensing of the auroral electrojet, Journal of Geophysical Research, vol. 101 no. A3 (March, 1996), pp. 5381-5389, American Geophysical Union (AGU), ISSN 0148-0227 [Gateway.cgi], [doi]  [abs]
354. Cummer, SA, Another new FDTD method for linear dispersive media - but this one's the best yet, Ap S International Symposium (Digest) (Ieee Antennas and Propagation Society), vol. 1 (January, 1995), pp. 208-211, Newport Beach, CA, USA [APS.1995.529997]  [abs]
355. Bell, TF; Inan, US; Danielson, MT; Cummer, SA, VLF signatures of ionospheric heating by HIPAS, Radio Science, vol. 30 no. 6 (January, 1995), pp. 1855-1867, American Geophysical Union (AGU) [95RS02191], [doi]  [abs]