The Experts below are selected from a list of 24 Experts worldwide ranked by ideXlab platform
Masaki Takamoto - One of the best experts on this subject based on the ideXlab platform.
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development of a new Diverter System for liquid flow calibration facilities
Flow Measurement and Instrumentation, 2003Co-Authors: Takashi Shimada, S Oda, Yoshiya Terao, Masaki TakamotoAbstract:Abstract The Diverter System is a key component in achieving a high-accuracy liquid flow rate standard using a static gravimetric System with a flying start and stop method. A new System with double diverting wings has been developed in order to reduce the Diverter timing error that dominates the uncertainty in the calibration of flowmeters. The basic concept of the new System is that each wing should move in the same direction at the beginning and end of measurement. The Diverter timing error has been estimated using a small prototype in a water flow circuit in order to make a comparison between the performance of the new System and those of conventional Systems with a single diverting wing. The results show that the jet flow condition has little effect on the timing error estimated by the double-wing method, although the error with the single-wing System is dependent on the liquid flow rate. Therefore, the triggering of the timing System can be easily adjusted over a wide range of flow rate by using the new Diverter System. Furthermore, this System is adopted for a new calibration facility for hydrocarbon flow measurements at NMIJ.
Joseph L Levasseur - One of the best experts on this subject based on the ideXlab platform.
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smart card reader with liquid Diverter System
1999Co-Authors: Joseph L LevasseurAbstract:This credit card reader (10) with a liquid diverting System (50, 52) includes a reader housing having lower and upper housing portions (12) and (14) and having an outwardly disposed entry portion (36, 46) defining an opening leading to a credit card enclosure (16) retained within the housing and having an opening 70. The liquid diverting System (50, 52) includes a movable member (50) movable from a first position blocking the enclosure (16) and providing drainage, to a second, flexed position permitting entry of a credit card (SC) into the enclosure (16).
Takashi Shimada - One of the best experts on this subject based on the ideXlab platform.
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development of a new Diverter System for liquid flow calibration facilities
Flow Measurement and Instrumentation, 2003Co-Authors: Takashi Shimada, S Oda, Yoshiya Terao, Masaki TakamotoAbstract:Abstract The Diverter System is a key component in achieving a high-accuracy liquid flow rate standard using a static gravimetric System with a flying start and stop method. A new System with double diverting wings has been developed in order to reduce the Diverter timing error that dominates the uncertainty in the calibration of flowmeters. The basic concept of the new System is that each wing should move in the same direction at the beginning and end of measurement. The Diverter timing error has been estimated using a small prototype in a water flow circuit in order to make a comparison between the performance of the new System and those of conventional Systems with a single diverting wing. The results show that the jet flow condition has little effect on the timing error estimated by the double-wing method, although the error with the single-wing System is dependent on the liquid flow rate. Therefore, the triggering of the timing System can be easily adjusted over a wide range of flow rate by using the new Diverter System. Furthermore, this System is adopted for a new calibration facility for hydrocarbon flow measurements at NMIJ.
Woonhong Yeo - One of the best experts on this subject based on the ideXlab platform.
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stretchable implantable nanostructured flow Diverter System for quantification of intra aneurysmal hemodynamics
ACS Nano, 2018Co-Authors: Connor Howe, Saswat Mishra, Yunsoung Kim, Yanfei Chen, William R Wagner, Jaewoong Jeong, Hunsoo Byun, Jonghoon Kim, Youngjae Chun, Woonhong YeoAbstract:Random weakening of an intracranial blood vessel results in abnormal blood flow into an aneurysmal sac. Recent advancements show that an implantable flow Diverter, integrated with a medical stent, enables a highly effective treatment of cerebral aneurysms by guiding blood flow into the normal vessel path. None of such treatment Systems, however, offers post-treatment monitoring to assess the progress of sac occlusion. Therefore, physicians rely heavily on either angiography or magnetic resonance imaging. Both methods require a dedicated facility with sophisticated equipment settings and time-consuming, cumbersome procedures. In this paper, we introduce an implantable, stretchable, nanostructured flow-sensor System for quantification of intra-aneurysmal hemodynamics. The open-mesh membrane device is capable of effective implantation in complex neurovascular vessels with extreme stretchability (500% radial stretching) and bendability (180° with 0.75 mm radius of curvature) for monitoring of the treatment progress. A collection of quantitative mechanics, fluid dynamics, and experimental studies establish the fundamental aspects of design criteria for a highly compliant, implantable device. Hemocompatibility study using fresh ovine blood captures the device feasibility for long-term insertion in a blood vessel, showing less platelet deposition compared to that in existing implantable materials. In vitro demonstrations of three types of flow sensors show quantification of intra-aneurysmal blood flow in a pig aorta and the capability of observation of aneurysm treatment with a great sensitivity (detection limit as small as 0.032 m/s). Overall, this work describes a mechanically soft flow-Diverter System that offers an effective treatment of aneurysms with an active monitoring of intra-aneurysmal hemodynamics.
S Oda - One of the best experts on this subject based on the ideXlab platform.
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development of a new Diverter System for liquid flow calibration facilities
Flow Measurement and Instrumentation, 2003Co-Authors: Takashi Shimada, S Oda, Yoshiya Terao, Masaki TakamotoAbstract:Abstract The Diverter System is a key component in achieving a high-accuracy liquid flow rate standard using a static gravimetric System with a flying start and stop method. A new System with double diverting wings has been developed in order to reduce the Diverter timing error that dominates the uncertainty in the calibration of flowmeters. The basic concept of the new System is that each wing should move in the same direction at the beginning and end of measurement. The Diverter timing error has been estimated using a small prototype in a water flow circuit in order to make a comparison between the performance of the new System and those of conventional Systems with a single diverting wing. The results show that the jet flow condition has little effect on the timing error estimated by the double-wing method, although the error with the single-wing System is dependent on the liquid flow rate. Therefore, the triggering of the timing System can be easily adjusted over a wide range of flow rate by using the new Diverter System. Furthermore, this System is adopted for a new calibration facility for hydrocarbon flow measurements at NMIJ.