The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Shinya Shimono - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
Tatsunori Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
Michael R. Wasielewski - One of the best experts on this subject based on the ideXlab platform.
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Near-Infrared Excitation of the peri-Xanthenoxanthene Radical Cation Drives Energy-Demanding Hole Transfer Reactions
The Journal of Physical Chemistry C, 2018Co-Authors: Joseph A. Christensen, Jinyuan Zhang, Jiawang Zhou, Jordan N. Nelson, Michael R. WasielewskiAbstract:Strongly oxidizing photosensitizers (superoxidants) based on organic radical cations are capable of Driving Energy-demanding reactions using low-Energy photons. Here, we show that the peri-xantheno...
Yana Vaynzof - One of the best experts on this subject based on the ideXlab platform.
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Field-Assisted Exciton Dissociation in Highly Efficient PffBT4T-2OD:Fullerene Organic Solar Cells
Chemistry of Materials, 2018Co-Authors: Andreas Weu, Thomas R. Hopper, Vincent Lami, Joshua A. Kreß, Artem A. Bakulin, Yana VaynzofAbstract:Understanding the photophysics of charge generation in organic semiconductors is a critical step toward the further optimization of organic solar cells. The separation of electron–hole pairs in systems with large Energy offsets is relatively well-understood; however, the photophysics in blends with low Driving Energy remains unclear. Herein, we use the material system PffBT4T-2OD:PC71BM as an example to show that the built-in electric field plays a critical role toward long-range charge separation in high-performance devices. By using steady-state and time-resolved spectroscopic techniques, we show that in neat films an energetic barrier impedes polymer exciton dissociation, preventing charge transfer to the fullerene acceptor. In complete devices, this barrier is diminished due to the built-in electric field provided by the interlayers/contacts and accompanying space-charge distribution. The observed behavior could also be relevant to other systems with low Driving Energy and emphasizes the importance of...
Le Ta Phan - One of the best experts on this subject based on the ideXlab platform.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
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Measurements of Driving Energy in SPT and various dynamic cone penetration tests
Soils and Foundations, 2015Co-Authors: Tatsunori Matsumoto, Le Ta Phan, Akihiko Oshima, Shinya ShimonoAbstract:Abstract Driving Energy was measured in a standard penetration test (SPT) and 12 types of dynamic cone penetration tests (DCPTs) having different configurations for the hammer, Driving rod, anvil and cone tip. The Driving Energy transferred from the free falling hammer to the Driving rod was estimated from the measurements of strain and acceleration below the anvil. Basically, the Driving Energy was estimated for 21 successive blows in order to obtain the mean value, the standard deviation ( σ ) and the coefficient of variance (COV) in the SPT and DCPTs. The dynamic cone resistance, q dyn , was estimated from the Driving Energy, the corresponding set per blow, and masses of the hammer and the total rods. Thus, the estimated dynamic cone resistance was compared with the static cone resistance, q t , from a cone penetration test (CPT). The main objective of this report is to provide information on the Driving efficiency in the SPT and each DCPT. The mean values for e f in the tests ranged from 52% to 76%. The values of COV for e f ranged from 0.024 to 0.265. Even though the test results are limited, the dynamic cone resistance, q t , estimated from the dynamic measurements were relatively good measures of the cone resistance from the CPT, showing the importance of the dynamic measurement in the SPT and DCPTs. In addition, possible factors influencing the Driving efficiency, such as the hammer mass, the configuration of the Driving rod (solid or hollow), the ratio of the diameter of the anvil and the diameter of the hammer, and the existence of a cushion or cushions between the anvil and the hammer, are discussed on the basis of the limited test results.
