Results 101 to 110 of about 152,362 (259)

Theory of spiral wave dynamics in weakly excitable media: asymptotic reduction to a kinematic model and applications

, 1999
In a weakly excitable medium, characterized by a large threshold stimulus, the free end of an isolated broken plane wave (wave tip) can either rotate (steadily or unsteadily) around a large excitable core, thereby producing a spiral pattern, or retract ...
A. Belmonte, A. Belmonte, A. Karma, A. Karma, A. Karma, A. Karma, A. M. Pertsov, A. P. Muñuzuri, A. S. Mikhailov, A. T. Winfree, A. T. Winfree, A. T. Winfree, Alain Karma, B. Vasiev, C. Henze, D. A. Kessler, D. A. Kessler, D. Barkley, D. Barkley, D. Barkley, D. Barkley, E. Lugosi, F. Fenton, F. Fenton, F. Siegert, G. Li, G. S. Skinner, I. Aranson, I. Mitkov, I. Mitkov, J. J. Tyson, J. J. Tyson, J. Nagumo, J. P. Keener, K. I. Agladze, K. I. Agladze, O. Steinbock, O. Steinbock, P. C. Fife, P. Pelce, P. Pelce, R. FitzHugh, S. Jakubith, T. Plesser, V. Hakim, V. Krinsky, V. N. Biktashev, V. N. Biktashev, V. S. Zykov, V. S. Zykov, Vincent Hakim, W. F. Loomis, W. Jahnke, W. K. Burton   +53 more
core   +1 more source

A Super‐Adhesive Air Filter With Capillarity‐Mediated Spontaneous Particle Absorption via Dynamic Bond Exchange

Advanced Materials, EarlyView.
We address the inherently weak particle adhesion of conventional air filters by coating a dynamically crosslinked adhesive layer that delivers capillarity‐driven strong adhesion and particle absorption mediated by dynamic bond exchange. The resulting enhancement in particle adhesion enables efficient ultrafast (up to 20 m s−1) and omnidirectional ...
Junyong Park, Hyeri Jeon, Hyunwoong Park, Ji Min Lee, Yeomyung Yoon, Gyeong Hwan Choi, Sazzadul A. Rahat, Dong Wook Lee, Sohdam Jeong, Jonathan T. Pham, Chae Bin Kim, Sanghyuk Wooh   +11 more
wiley   +1 more source

The Evolving Future of Instantaneous Wave-Free Ratio and Fractional Flow Reserve

Journal of the American College of Cardiology, 2017
In this review, the authors reflect upon the role of coronary physiology in the modern management of coronary artery disease. They critically appraise the scientific background of the instantaneous wave-free ratio (iFR) and fractional flow reserve (FFR), from early experimental studies to validation studies against indexes of ischemia, to clinical ...
Matthias, Götberg, Christopher M, Cook, Sayan, Sen, Sukhjinder, Nijjer, Javier, Escaned, Justin E, Davies   +5 more
openaire   +2 more sources

Testing quantum adiabaticity with quench echo

, 2010
Adiabaticity of quantum evolution is important in many settings. One example is the adiabatic quantum computation. Nevertheless, up to now, there is no effective method to test the adiabaticity of the evolution when the eigenenergies of the driven ...
Damski B Quan H T Zurek W H, Das A, Dziarmaga J, H T Quan, Kibble T W B, Messiah A, Sachdev S, W H Zurek, Zurek W H, Zurek W H   +9 more
core   +1 more source

Decoding THz‐Driven Dynamic Fingerprints of Ferroelectric Nanotwin Networks

Advanced Materials, EarlyView.
ABSTRACT Ultrafast polarization dynamics in ferroelectrics are of considerable interest for high‐speed tunable dielectrics and electro‐optics. Extended domain wall networks formed in ferroelectric twin nanodomains can support collective dynamics in the terahertz regime but require techniques that track polarization and strain evolution driven by ...
Xiaojiang Li, Aiden Ross, Vladimir A. Stoica, Sujit Das, Sankalpa Hazra, Huaiyu (Hugo) Wang, Hari Padma, Matthias C. Hoffmann, Patrick Kramer, Sanghoon Song, Silke Nelson, Takahiro Sato, Diling Zhu, Ramamoorthy Ramesh, Lane W. Martin, Yue Cao, John W. Freeland, Aaron M. Lindenberg, Haidan Wen, Long‐Qing Chen, Venkatraman Gopalan   +20 more
wiley   +1 more source

Plasmonic Nanomachines: Creating Local Potential Gradients and Motions

Advanced Materials, EarlyView.
Plasmonic nanomachines can generate optical, thermal, and chemical potential gradients to drive directional rectilinear, rotational, and twisting motions at the nanometer scale. The integration of multimodal plasmonic forces with functional materials and programmed structural distortions enables precise spatiotemporal actuation, thereby providing a ...
Yoonhee Kim, Soohyun Ji, Donghyun Choi, Jwa‐Min Nam   +3 more
wiley   +1 more source

Hemodynamic and Lesion Characteristics Associated with Discordance between the Instantaneous Wave-Free Ratio and Fractional Flow Reserve

Journal of Interventional Cardiology, 2019
Background. The instantaneous wave-free ratio (iFR) is an invasive coronary physiological index that is not inferior to fractional flow reserve- (FFR-) guided revascularization. The indexes of iFR and FFR are similar and closely correlated, but there are
Hiroyuki Arashi, Natsuko Satomi, Issei Ishida, Kanintorn Soontorndhada, Suguru Ebihara, Kazuki Tanaka, Hisao Otsuki, Masashi Nakao, Kentaro Jujo, Junichi Yamaguchi, Nobuhisa Hagiwara   +10 more
doaj   +1 more source

Comparison of Current and Novel ECG-Independent Algorithms for Resting Pressure Derived Physiologic Indices

IEEE Access, 2019
Recently, instantaneous wave-free ratio (iFR) or diastolic pressure-ratio (dPR) have been used in practice. For these indices, the reliability of electrocardiography (ECG)-independent algorithm for pressure-only data is essential.
Ki Hong Choi, Jinhyoung Park, Joo Myung Lee, Taewon Choi, Young Bin Song, Joo-Yong Hahn, Chang-Wook Nam, Eun-Seok Shin, Joon-Hyung Doh, Seung-Ho Hur, Bon-Kwon Koo   +10 more
doaj   +1 more source

Direct Mode‐Resolved Measurement of Interfacial Phonon Transport by Acoustic Phonon Reflectometry

Advanced Materials Interfaces, EarlyView.
We introduce a novel analysis, acoustic phonon reflectometry, that measures the mode‐resolved phonon reflection coefficient at semiconductor interfaces. In aluminum nitride, we observe excellent agreement with the acoustic mismatch model across three distinct interfaces.
Christopher Hennighausen, Gustavo A. Alvarez, Jeffrey Z. Kaaret, Patrick Soucy, Amir F. Amhaz, Jeffrey Moses, Kenneth R. Beyerlein, Nicole A. Benedek, Zhiting Tian, Ankit S. Disa   +9 more
wiley   +1 more source

Coronary Flow Capacity to Identify Stenosis Associated With Coronary Flow Improvement After Revascularization: A Combined Analysis From DEFINE FLOW and IDEAL

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, 2020
Background Coronary flow capacity (CFC), which is a categorical assessment based on the combination of hyperemic coronary flow and coronary flow reserve (CFR), has been introduced as a comprehensive assessment of the coronary circulation to overcome the ...
Tadashi Murai, Valérie E. Stegehuis, Tim P. van de Hoef, Gilbert W. M. Wijntjens, Masahiro Hoshino, Yoshihisa Kanaji, Tomoyo Sugiyama, Rikuta Hamaya, Sukhjinder S. Nijjer, Guus A. de Waard, Mauro Echavarria‐Pinto, Paul Knaapen, Martijn Meuwissen, Justin E. Davies, Niels van Royen, Javier Escaned, Maria Siebes, Richard L. Kirkeeide, K. Lance Gould, Nils P. Johnson, Jan J. Piek, Tsunekazu Kakuta   +21 more
doaj   +1 more source