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Recurso libre

"Voting Technology and Uncounted Votes in the United States"
Ansolabehere, Stephen - Stewart, Charles

Formato:	Article
Enlaces:	The final version of the voting technology report, in the Journal of Politics
Fecha:	2004-08-20
Recurso:	MIT

Recurso libre

Book Review of G.A. Cohen, "Marx's Theory of History, A Defence".
Cohen, Joshua

Formato:	Article
Enlaces:	book review
Fecha:	2004-08-20
Recurso:	MIT

Recurso libre

Review of "Inequality Reexamined" by Amartya Sen
Cohen, Joshua

Formato:	Article
Enlaces:	review of Amartya Sen's "Ineqaulity Reexamined"
Fecha:	2004-08-20
Recurso:	MIT

Recurso libre

Review of "Spheres of Justice: A Defense of Pluralism and Equality" by Michael Walzer
Cohen, Joshua

Formato:	Article
Enlaces:	Review of Michael Walzer, "Spheres of Justice"
Fecha:	2004-08-20
Recurso:	MIT

Recurso libre

Theoretical Estimates of Mechanical Properties of the Endothelial Cell Cytoskeleton
Satcher, Robert L. Jr. - Dewey, C. Forbes Jr.

Formato:	Article
Enlaces:	Current modeling of endothelial cell mechanics does not account for the network of F-actin that permeates the cytoplasm. This network, the distributed cytoplasmic structural actin (DCSA), extends from apical to basal membranes, with frequent attachments. Stress fibers are intercalated within…
Fecha:	2005-08-31
Recurso:	MIT

Recurso libre

Interpreting Photoactive Fluorescence Microscopy Measurements of Steady-State Actin Dynamics
Tardy, Y. - McGrath, J.L. - Hartwig, J.H. - Dewey, C.F.

Formato:	Article
Enlaces:	A continuum model describing the steady-state actin dynamics of the cytoskeleton of living cells Has been developed to aid in the interpretation of photoactivated fluorescence experiments. In a simplified cell geometry, the model assumes uniform concentrations of cytosolic and cytoskeletal…
Fecha:	2005-08-31
Recurso:	MIT

Recurso libre

Pressure Dependence of the Infrared Laser Lines in Barium Vapor
Madigan, M. - Hocker, L.O. - Flint, J.H. - Dewey, C.F. Jr

Formato:	Article
Enlaces:	We have studied nine laser transitions in Ba vapor at wavelengths between 1.13 and 3.05 micrometer. Three of these laser lines have not been reported previously. The relative intensities of the four strongest transitions (1.13, 1.50, 2.55, and 2.92 micrometer)…
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

Calculations of viscoelastic flow in a journal bearing
Beris, Antony N

Formato:	Thesis
Enlaces:	by Antony N. Beris., Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986., MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE., Bibliography: leaves 254-262.
Fecha:	2005-08-08
Recurso:	MIT

Recurso libre

Active Vorticity Control in a Shear Flow Using a Flapping Foil
Gopalkrishnan, R. - Triantafyllou, M.S. - Triantafyllou, G.S. - Barrett, D.S.

Formato:	Article
Enlaces:	It is shown experimentally that free shear flows can be substantially altered through direct control of the large coherent vortices present in the flow.
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

10.

Regulation of Adenine Nucleotide Concentration at Endothelium-Fluid Interface by Viscous Shear Flow
Shen, Jian - Gimbrone, Michael A. Jr. - Luscinskas, Francis W. - Dewey, C. Forbes Jr.

Formato:	Article
Enlaces:	The action of adenine nucleotides on vascular endothelial cells is apparently mediated by the local flow conditions. Because nucleotides are sequentially degraded from ATP - ADP - AMP -- adenosine by ecto-enzymes at the endothelial surface, it has been hypothesized…
Fecha:	2005-08-31
Recurso:	MIT

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11.

Simultaneous Measurements of Actin Filament Turnover, Filament Fraction, and Monomer Diffusion in Endothelial Cells
McGrath, J. L. - Tardy, Y. - Dewey, C. F. Jr - Meister, J. J. - Hartwig, J. H.

Formato:	Article
Enlaces:	The analogous techniques of photoactivation of fluorescence (PAF) and fluorescence recovery after photobleaching (FRAP) have been applied previously to the study of actin dynamics in living cells. Traditionally, separate experiments estimate the mobility of actin monomer or the lifetime of…
Fecha:	2005-08-31
Recurso:	MIT

Recurso libre

12.

Improved Temporal Stability of Polymethine Laser Dyes in Aqueous Solutions
Hackett, C.E. - Dewey, C.F. Jr

Formato:	Article
Enlaces:	Polymethine laser dyes which fluoresce in the near infrared in organic solvents generally exhibit poor temporal stability at room temperature. Two typical laser-pumped polymethine dyes in aqueous solutions containing nonionic surfactants are investigated. Temporal stability was improved 20-fold, as compared…
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

13.

Robust Control For Underwater Vehicle Systems With Time Delays
Triantafyllou, Michael S . - Grosenbaugh, Mark A.

Formato:	Article
Enlaces:	Presented in this paper is a robust control scheme for controlling systems with time delays. The scheme is based on the Smith controller and the LQG/LTR (Linear Quadratic Gaussian/Loop Transfer Recovery) methodology. The methodology is applicable to undenvater vehicle systems…
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

14.

Calculation of Dynamic Motions and Tensions in Towed Underwater Cables
Hover, Frank S. - Grosenbaugh, Mark A. - Triantafyllou, Michael S.

Formato:	Article
Enlaces:	A matrix method for mooring system analysis is extended to address the dynamic response of towed underwater systems. Key tools are equivalent linearization and small perturbation theory, and a pitching towfish model. Two examples of application of the technique are…
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

15.

Lasing Efficiency and Photochemical Stability of IR Laser
Oettinger, Peter E. - Dewey, C. Forbes Jr

Formato:	Article
Enlaces:	The lasing efficiencies and photochemical stabilities of laser dyes useful in the 710-1080-nm spectral region have been investigated using a Q-switched ruby laser pumping source. The measured bleaching rates P defined as the probability of irreversible decomposition of a dye
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

16.

Oscillating foils of high propulsive efficiency
Anderson, J. M. - Streitlien, K. - Barrett, D.S. - Triantafyllou, M.S.

Formato:	Article
Enlaces:	Thrust-producing harmonically oscillating foils are studied through force and power measurements, as well as visualization data, to classify the principal characteristics of the flow around and in the wake of the foil. Visualization data are obtained using digital particle image…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

17.

Vortical patterns behind a tapered cylinder oscillating transversely
Techet, A. H. - Hover, F. S. - Triantafyllou, M.S.

Formato:	Article
Enlaces:	Visualization studies of the flow behind an oscillating tapered cylinder are performed at Reynolds numbers from 400 to 1500. The cylinder has taper ratio 40:1 and is moving at constant forward speed U while being forced to oscillate harmonically in…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

18.

Real Time Estimation of Ship Motions Using Kalman Filtering Techniques
Triantafyllou, Michael S. - Bodson, Marc - Athans, Michael

Formato:	Article
Enlaces:	The estimation of the heave, pitch, roll, sway, and yaw motions of a DD-963 destroyer is studied, using Kalman filtering techniques, for application in VTOL aircraft landing. The governing equations are obtained from hydrodynamic considerations in the form of…
Fecha:	2005-08-04
Recurso:	MIT

Recurso libre

19.

Review of Experimental Work in Biomimetic Foils
Triantafyllou, Michael S. - Techet, Alexandra H. - Hover, Franz S.

Formato:	Article
Enlaces:	Significant progress has been made in understanding some of the basic mechanisms of force production and flow manipulation in oscillating foils for underwater use. Biomimetic observations, however, show that there is a lot more to be learned, since many of…
Fecha:	2005-08-23
Recurso:	MIT

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20.

Induced-charge electro-osmosis
Squires, Todd M. - Bazant, Martin Z.

Formato:
Enlaces:	We describe the general phenomenon of âinduced-charge electro-osmosis’ (ICEO) – the nonlinear electro-osmotic slip that occurs when an applied field acts on the ionic charge it induces around a polarizable surface. Motivated by a simple physical picture, we calculate ICEO…
Fecha:	2005-08-31
Recurso:	MIT

Recurso libre

21.

Forces on oscillating uniform and tapered cylinders in a crossflow
Hover, F. S. - Techet, A. H. - Triantafyllou, M.S.

Formato:	Article
Enlaces:	Forces are measured at both ends of rigid cylinders with span 60 cm, performing transverse oscillations within an oncoming stream of water, at Reynolds number Re ~3800. Forced harmonic motions and free vibrations of uniform and tapered cylinders are studied.…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

22.

Mechanics of nonlinear short-wave generation by a moored near-surface buoy
Zhu, Q. - Liu, Y. - Tjavaras, A.A. - Triantafyllou, M.S. - Yue, D.K.P.

Formato:	Article
Enlaces:	We consider the nonlinear interaction problem of surface waves with a tethered near-surface buoy. Our objective is to investigate mechanisms for nonlinear short surface wave generation in this complete coupled wave-buoy-cable dynamical system. We develop an effective numerical simulation capability…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

23.

Drag reduction in fish-like locomotion
Barrett, D.S. - Triantafyllou, M.S. - Yue, D.K.P. - Grosenbaugh, M.A. - Wolfgang, M.J.

Formato:	Article
Enlaces:	We present experimental force and power measurements demonstrating that the power required to propel an actively swimming, streamlined, fish-like body is significantly smaller than the power needed to tow the body straight and rigid at the same speed U. The…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

24.

Vortex-induced vibrations of a cylinder with tripping wires
Hover, F.S. - Tvedt, H. - Triantafyllou, M.S.

Formato:	Article
Enlaces:	Thin wires are attached on the outer surface and parallel to the axis of a smooth circular cylinder in a steady cross-stream, modelling the effect of protrusions and attachments. The impact of the wires on wake properties, and vortex-induced loads
Fecha:	2005-08-23
Recurso:	MIT

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25.

Three-dimensional flow structures and vorticity control in fish-like swimming
Zhu, Q. - Wolfgang, M.J. - Yue, D.K.P. - Triantafyllou, M.S.

Formato:	Article
Enlaces:	We employ a three-dimensional, nonlinear inviscid numerical method, in conjunction with experimental data from live fish and from a fish-like robotic mechanism, to establish the three-dimensional features of the flow around a fish-like body swimming in a straight line, and…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

26.

Turbulent Flow over a Flexible Wall Undergoing a Streamwise Traveling Wavy Motion
Shen, Lian - Zhang, Xiang - Yue, Dick K.P. - Triantafyllou, Michael S.

Formato:	Article
Enlaces:	Direct numerical simulation is used to study the turbulent flow over a smooth wavy wall undergoing transverse motion in the form of a streamwise travelling wave. The Reynolds number based on the mean velocity U of the external flow and…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

27.

Design and Projected Performance of a Flapping Foil AUV
Licht, Stephen - Polidoro, Victor - Flores, Melissa - Hover, Franz S. - Triantafyllou, Michael S.

Formato:	Article
Enlaces:	The design and construction of a biomimetic flapping foil autonomous underwater vehicle is detailed. The vehicle was designed as a proof of concept for the use of oscillating foils as the sole source of motive power for a cruising and…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

28.

From the portfolio to the diagram : architectural discourse and the transformation of the discipline of architecture in America, 1918-1943, Architectural discourse and the transformation of the discipline of architecture in America, 1918-1943
Pae, Hyŏng-min. - Pai, Hyungmin

Formato:	Thesis
Enlaces:	This dissertation is an historical inquiry into the concomitant transformations of architectural discourse and the discipline of architecture in America. It proceeds on the theoretical assumption that the documents produced and used in architecture not only reflect but constitute architecture…
Fecha:	2005-08-15
Recurso:	MIT

Recurso libre

29.

The expertise of germs : practice, language and authority in American bacteriology, 1899-1924
Kupferberg, Eric David

Formato:	Thesis
Enlaces:	This thesis traces the development of American bacteriology during the first quarter of the twentieth century. While bacteriology experienced a period of rapid growth, an enduring disciplinary anxiety equally characterized the field. In particular, bacteriologists feared increasing specialization and conceptual…
Fecha:	2005-08-23
Recurso:	MIT

Recurso libre

30.

Optimal Generation Expansion Planning for Electric Utilities Using Decomposition and Probabilistic Simulation Techniques
Bloom, Jeremy A.

Formato:	Working Paper
Enlaces:	Three related methods are presented for determining the least-cost generating capacity investments required to meet given future demands for electricity. The models are based on application of large-scale mathematical programming decomposition techniques. In the first method, decomposition techniques are applied…
Fecha:	2004-05-28
Recurso:	MIT