Institution
Iowa State University
Education•Ames, Iowa, United States•
About: Iowa State University is a education organization based out in Ames, Iowa, United States. It is known for research contribution in the topics: Population & Gene. The organization has 50151 authors who have published 107716 publications receiving 3355909 citations. The organization is also known as: Iowa State University of Science and Technology & Iowa State College.
Topics: Population, Gene, Catalysis, Context (language use), Superconductivity
Papers published on a yearly basis
Papers
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TL;DR: The work described in this paper was motivated by a perceived increase in the frequency at which power system operators are encountering high stress in bulk transmission systems and the corresponding need to improve security monitoring of these networks.
Abstract: The work described in this paper was motivated by a perceived increase in the frequency at which power system operators are encountering high stress in bulk transmission systems and the corresponding need to improve security monitoring of these networks. Online risk-based security assessment provides rapid online quantification of a security level associated with an existing or forecasted operating condition. One major advantage of this approach over deterministic online security assessment is that it condenses contingency likelihood and severity into indices that reflect probabilistic risk. Use of these indices in control room decision making leads to increased understanding of potential network problems, including overload, cascading overload, low voltages, and voltage instability, resulting in improved security-related decision making. Test results on large-scale transmission models retrieved from the energy-management system of a U.S. utility company are described.
373 citations
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TL;DR: By calibrating the spin rotation with an adiabatic passage, the room-temperature “strong-driving” dynamics of a single nitrogen vacancy center in diamond are measured and the breakdown of the rotating wave approximation provides opportunities for time-optimal quantum control of asingle spin.
Abstract: Two-level systems are at the core of numerous real-world technologies such as magnetic resonance imaging and atomic clocks. Coherent control of the state is achieved with an oscillating field that drives dynamics at a rate determined by its amplitude. As the strength of the field is increased, a different regime emerges where linear scaling of the manipulation rate breaks down and complex dynamics are expected. By calibrating the spin rotation with an adiabatic passage, we have measured the room-temperature "strong-driving" dynamics of a single nitrogen vacancy center in diamond. With an adiabatic passage to calibrate the spin rotation, we observed dynamics on sub-nanosecond time scales. Contrary to conventional thinking, this breakdown of the rotating wave approximation provides opportunities for time-optimal quantum control of a single spin.
373 citations
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TL;DR: In this article, a quasi-static model for ultrasonic transmission and reflection at imperfect interfaces is developed, where the interface is represented by a distributed spring determined by the change in static compliance of the medium with respect to one with a perfect interface, and a distributed mass, representing excess mass at the interface.
Abstract: A quasi-static model for the ultrasonic transmission and reflection at imperfect interfaces is developed. The interface is represented by a distributed spring, determined by the change in static compliance of the medium with respect to one with a perfect interface, and a distributed mass, representing excess mass at the interface. Comparison of the model predictions to exact solutions for two simple cases illustrates its accuracy at low frequencies. The spring stiffnesses can be derived from existing solutions for the elastic displacement of materials containing cracks and inclusions under static load. Results for a variety of cases are reviewed. Applications of the model to study the characteristics of partially contacting surfaces in several problem areas of current interest are discussed.
373 citations
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373 citations
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TL;DR: This review provides a comprehensive overview of the construction of heterocycles using Kobayashi's silylaryl triflate aryne precursors and is organized according to the type ofheterocycle generated.
Abstract: About two decades after Kobayashi's discovery in 1983 of a very mild way of generating highly reactive aryne intermediates, the synthetic community embraced o-(trimethylsilyl)aryl triflates as convenient and versatile aryne precursors for the synthesis of carbocycles and heterocycles, as well as natural products and pharmaceutically promising drug candidates. This review provides a comprehensive overview of the construction of heterocycles using Kobayashi's silylaryl triflate aryne precursors. It is organized according to the type of heterocycle generated.
373 citations
Authors
Showing all 50392 results
Name | H-index | Papers | Citations |
---|---|---|---|
Feng Zhang | 172 | 1278 | 181865 |
Yang Gao | 168 | 2047 | 146301 |
Steven N. Blair | 165 | 879 | 132929 |
Carlos Bustamante | 161 | 770 | 106053 |
Darien Wood | 160 | 2174 | 136596 |
Pete Smith | 156 | 2464 | 138819 |
Richard J. Davidson | 156 | 602 | 91414 |
Mark Raymond Adams | 147 | 1187 | 135038 |
H. A. Neal | 141 | 1903 | 115480 |
Mitchell Wayne | 139 | 1810 | 108776 |
Frank Filthaut | 135 | 1684 | 103590 |
Tiziano Rovelli | 135 | 1441 | 90518 |
Francesco Navarria | 135 | 1535 | 91427 |
Francesca Romana Cavallo | 135 | 1571 | 92392 |
Yasar Onel | 134 | 1424 | 92200 |