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903 results on '"Kim, Hyun S."'

11. Benign Tracheal Stenosis: Medical Versus Surgical Management

Author

Kim, Hyun S., Oberg, Catherine L., Khandhar, Sandeep, Folch, Erik E., Rounds, Sharon I. S., Series Editor, Dixon, Anne, Series Editor, Schnapp, Lynn M., Series Editor, Turner, Jr., J. Francis, editor, Jain, Prasoon, editor, Yasufuku, Kazuhiro, editor, and Mehta, Atul C., editor

Published
2021
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20. Management of Female Venous Congestion Syndrome

Author

Idrees, Rabia, primary, Kim, Tammy, additional, McCormick, Ellen C., additional, Kies, Darren D., additional, Lee, Judy M., additional, Salman, Anam, additional, Igboagi, Uzoma, additional, Alzaki, Ajlan, additional, Kim, Hyun S., additional, and Venbrux, Anthony C., additional

Published
2020
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21. Direct mechanical mixing in a nanoelectromechanical diode

Author

Kim, Hyun S., Qin, Hua, and Blick, Robert H.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We observe direct mechanical mixing in nanoelectromechanical transistors fabricated in semiconductor materials operating in the radio frequency band of 10-1000 MHz. The device is made of a mechanically flexible pillar with a length of 240 nm and a diameter of 50 nm, placed between two electrodes in an impedance matched coplanar wave guide. We find a non-linear IV-characteristic, which enables radio frequency mixing of two electromagnetic signals via the nanomechanical transistor. Potential applications for this mixer are ultrasensitive displacement detection or signal processing in communication electronic circuits requiring high-throughput insulation., Comment: 3 pages, 4 figures. This article has been published by Applied Physics Letters. You can find this article online at http://apl.aip.org in Oct. 2007

Published
2007
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22. Self Excitation of Nano-Mechanical Pillars

Author

Kim, Hyun S., Qin, Hua, and Blick, Robert H.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Self excitation is a mechanism which is ubiquitous for electromechanical power devices such as electrical generators. This is conventionally achieved by making use of the magnetic field component in electrical generators [1], where a good example are the overall visible wind farm turbines [2]. In other words, a static force, like wind acting on the rotor blades, can generate a resonant excitation at a certain mechanical frequency. For nanomechanical systems [3,4,5] such a self excitation (SE) mechanism is highly desirable as well, since it can generate mechanical oscillations at radio frequencies by simply applying a DC bias voltage. This is of great importance for low-power signal communication devices and detectors, as well as for mechanical computing elements. For a particular nanomechanical system - the single electron shuttle - this effect was predicted some time ago by Gorelik et al. [6]. Here, we use a nano-electromechanical single electron transistor (NEMSET) to demonstrate self excitation for both the soft and hard regime, respectively. The ability to use self excitation in nanomechanical systems may enable the detection of quantum mechanical backaction effects [7] in direct tunneling, macroscopic quantum tunneling [8], and rectification [9]. All these effects have so far been over shadowed by the large driving voltages, which had to be applied., Comment: 19 pages including 4 figures

Published
2007

23. Quality Improvement Guidelines for Mesenteric Angioplasty and Stent Placement for the Treatment of Chronic Mesenteric Ischemia

Author

Walker, T. Gregory, Silberzweig, James E., Nikolic, Boris, Aeron, Gunjan, Angle, J. Fritz, Arellano, Ronald, Athreya, Sriharsha, Baerlocher, Mark O., Balter, Stephen, Baskin, Kevin, Brennan, Ian, Brook, Olga, Brown, Daniel B., Caplin, Drew, Censullo, Michael, Chamsuddin, Abbas, Chao, Christine, Dagli, Mandeep S., Davidson, Jon, Devane, A., Eyheremendy, Eduardo, Fintelmann, Florian, Gemmete, Joseph J., Gendel, Vyacheslav, Gould, Jennifer, Graham, Tara, Hancock, John, Hogan, Mark, Hohenwalter, Eric, d’Othee, Bertrand Janne, Khan, Arshad A., Kim, Hyun S. “Kevin”, Kohi, Maureen Pearl, Lee, Christy, Mani, Naganathan B., Martinez-Salazar, Gloria, McGraw, J. Kevin, Meyers, Philip, Miller, Donald L., Morris, Christopher, Patel, Indravadan, Pillai, Anil K., Pua, Uei, Redstone, Ellen, Roberts, Anne C., Saad, Wael E., Sabharwal, Tarun, Sapoval, Marc, Schiro, Brian J., Shah, Samir, Shyn, Paul, Padia, Siddharth A., Siddiqi, Nasir H., Stokes, LeAnn, Suri, Rajeev, Turba, Ulku, Venkatesan, Aradhana, Weinstein, Jeffrey L., Kalva, Sanjeeva P., Hsu, Steven L., Annamalai, Ganesan, Mitchell, Jason W., Midia, Mehran, and Dariushnia, Sean R.

Published
2018
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44. Synergistic combination of information from ground observations, geostationary satellite, and air quality modeling towards improved PM2.5 predictability

Author

Song, Chul H., primary, yu, Jinhyeok, additional, Lee, Dogyeong, additional, Lee, Sojin, additional, Kim, Hyun S., additional, Han, Kyung M., additional, Jeon, Moongu, additional, Park, Seohui, additional, Im, Jungho, additional, Park, Soon-Young, additional, Peuch, Vincent-Henri, additional, Saide, Pablo, additional, Carmichael, Gregory, additional, Kim, Jeeho, additional, Kim, Jhoon, additional, Song, Chang-Keun, additional, Woo, Jung-Hun, additional, and Ryu, Seong-Hyun, additional

Published
2022
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