Citations Only: Recent submissions
Now showing items 141-160 of 990
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A Prototype HeartQuest ventricular assist device for particle image velocimetry measurements
(Artificial organs, 2002-11-01)The objective of this study is to fully characterize the flow within the HeartQuest ventricular assist device (VAD), a magnetically levitated centrifugal VAD, using particle image velocimetry (PIV) to identify regions of ... -
Integrating the determinants of suction feeding performance in centrarchid fishes
(Company of Biologists, 2008-10-07)When suction-feeding vertebrates expand their buccal cavity to draw water into their mouth, they also exert a hydrodynamic force on their prey. This force is key to strike success, directly countering forces exerted by ... -
Time resolved measurements of the flow generated by suction feeding fish
(Experiments in fluids, 2007) -
Studies of turbulence models in a computational fluid dynamics model of a blood pump
(Artificial organs, 2003-10-14)Computational fluid dynamics (CFD) is used widely in design of rotary blood pumps. The choice of turbulence model is not obvious and plays an important role on the accuracy of CFD predictions. TASCflow (ANSYS Inc., Canonsburg, ... -
Spatial and temporal patterns of water flow generated by suction-feeding bluegill sunfish Lepomis macrochirus resolved by Particle Image Velocimetry
(The Company of Biologists, 2005-05-24)The suction-feeding fish generates a flow field external to its head in order to draw prey into the mouth. To date there are very few empirical measurements that characterize the fluid mechanics of suction feeding, p ... -
Sucking while swimming: Evaluating the effects of ram speed on suction generation in bluegill sunfish Lepomis macrochirus using digital particle image velocimetry
(The Company of Biologists, 2005-05-11)It is well established that suction feeding fish use a variable amount of swimming (ram) during prey capture. However, the fluid mechanical effects of ram on suction feeding are not well established. In this study ... -
Multidimensional analysis of suction feeding performance in fishes: Fluid speed, acceleration, strike accuracy and the ingested volume of water
(The Company of Biologists, 2006-05-03)Suction feeding fish draw prey into the mouth using a flow field that they generate external to the head. In this paper we present a multidimensional perspective on suction feeding performance that we illustrate in ... -
The Application of quantitative oil streaking to the HeartQuest left ventricular assist device
(Artificial organs, 2002-11-01)Methods of flow visualization using oil streaking are established techniques for investigating surface shear and near wall flow patterns. Recent studies have used an array of oil dots on a surface which form streaks when ... -
The Pressures of suction feeding: The Relation between buccal pressure and induced fluid speed in centrarchid fishes
(The Company of Biologists, 2006-06-14)Suction feeding fish rapidly expand their oral cavity, resulting in a flow of water directed towards the mouth that is accompanied by a drop in pressure inside the buccal cavity. Pressure inside the mouth and fluid ... -
Blood flow through channels and clearances in implantable blood pumps
(ASME, 2007-06) -
Supercharging your parento analysis
(American Society for Quality, 2000-10)An increasing number of companies are providing their employees with training in quality and encouraging them to use quality tools. But care must be taken to minimize the risk that the tools will be used inappropriately. ... -
Case Study: Rolls-Royce Radicals
(Stanford Social Innovation Review, 2007)Responsible Wealth, a Boston-based nonprofit, is convincing many affluent Americans to challenge the very rules that made them rich. Far from mere check writers or "limousine liberals," these wealthy activists work against ... -
Sustainability through servicizing
(MIT Sloan Management Review, 2007)As the scientific evidence for environmental degradation becomes harder to discount, enlightened companies have begun embracing the vision of "sustainable development," defined by the World Commission on Environment and ... -
Acousto-electro-optic demultiplexers in high data-rate optical communication systems
(Elsveier - Optics & Laser Technology, 1996-09)Acousto-electro-optic scanners are introduced as time-division demultiplexing devices in optical fibre communication systems. These devices can time-demultiplex digital signals with multiple Gb s−1 data rates into a large ... -
Thin-film approximate modeling of in-core fiber gratings
(SPIE - Optical engineering, 1996-10)Generally tilted in-core fiber gratings are modeled by an equivalent inhomogeneous optical thin film. Its reflectance spectrum is evaluated using the multilayer and optical-path approximations. The results are shown to be ... -
Hybrid optical processor for systems of nonlinear equations
(Elsevier - Optics Communications, 1996-03)A hybrid optical processor to solve a system of nonlinear equations is presented. The proposed system has been based on the Bimodal Optical Computer (BOC). Two algorithms based on the BOC are presented and compared. One ... -
A Hybrid N-Body Code incorporating algorithmic regularization and Post-Newtonian forces
(Wiley InterScience: Monthly Notices of the Royal Astronomical Society, 2008-07-24)We describe a novel N-body code designed for simulations of the central regions of galaxies containing massive black holes. The code incorporates Mikkola’s “algorithmic” chain regularization scheme including post-Newtonian ... -
An Instability in triaxial stellar systems
(Wiley InterScience: Astronomische Nachrichten, 2008-12)The radial-orbit instability is a collective phenomenon that has heretofore only been observed in spherical systems. We find that this instability occurs also in triaxial systems, as we checked by performing extensive ...