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Displaying 44476 - 44500 of 73929

Silicon Nanostructures Fabricated by Scanning Probe Lithography and TMAH Etching

January 1, 2002
Author(s)
F S. Chien, W F. Hsieh, S Gwo, Andras Vladar, John A. Dagata
Fabrication of silicon nanostructures is a key technique for the development of monolithically integrated optoelectronic circuits. We demonstrate that the process of scanning probe lithography (SPL) and anisotropic TMAH etching is a low-cost and reliable

Simultaneous Phase Control of Li 2 Wave Packets in Two Electronic States

January 1, 2002
Author(s)
H U. Stauffer, J B. Ballard, Z Amitay, S R. Leone
State-selective phase control of rotational Li 2 wave packets prepared simultaneously in the E( 1ς u +) and E( 1ς g +) electronic state by resonant impulsive simulated Raman scattering, is demonstrated. Following the initial population of a rovibrational

Small Angle Neutron Scattering From Viscoelastic Polymer-Clay Solutions

January 1, 2002
Author(s)
G Schmidt, A Nakatani, Paul Butler, Charles C. Han
The influence of shear on viscoelastic polymer-clay solutions was investigated by means of small-angle neutron scattering (SANS) under shear. SANS measured the shear-induced orientation of polymer and platelets. With increasing shear rate an anisotropic

Small-Scale Tactile Graphics for Virtual Reality Systems

January 1, 2002
Author(s)
John W. Roberts
¿¿¿As virtual reality technology moves forward, there is a need to provide the user with options for greater realism for closer engagement to the human senses. Haptic systems use force feedback to create a large-scale sensation of physical interaction in a

Spin Excitations in a Fermi Gas of Atoms

January 1, 2002
Author(s)
B. L. DeMarco, Deborah S. Jin
We have experimentally investigated a a spin excitation in a quantum degenerate Fermi gas of atomes. In the hydrodynamic regime the damping time of the collective excitation is used to probe the quantum behavior of the gas. At temperatures below the Fermi

Stability Analysis of 2-DOF End-Milling for a Range of Radial Immersions

January 1, 2002
Author(s)
P V. Bayly, Tony L. Schmitz, D A. Peters, B P. Mann
Low radial immersion end-milling involves intermittent cutting. If the tool is flexible, its motion in both the x- and y-directions affects the chip load and cutting forces, leading to chatter instability under certain conditions. Interrupted cutting
Displaying 44476 - 44500 of 73929
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