1,925 research outputs found

    Collecting, Documenting, and Sharing Detroit Arts Culture: In and Around Wayne State, 1960s-1980s

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    Collecting, Documenting, and Sharing Detroit Arts Culture: In and Around Wayne State, 1960s-1980s In the 1960s, as explosive social and political movements gave rise to the rejection of post-World War II middle-class society, Wayne State University and its nearby environs emerged as a cultural force. A loosely drawn community of artists, poets, musicians and politicos became active participants in this boldly expressive movement, with much activity centered in the Cass Corridor, adjacent to campus. While this mirrored what was going on in other parts of the country, Detroiters had their own source material, inspiration, and tools for expression. This panel will present and discuss this important time in Detroit\u27s cultural history, and a number of projects undertaken to preserve its heritage. Featured will be a video which includes the work of a number of Cass Corridor artists from that time period, and two collaborative oral history projects which document the stories of Detroit\u27s art, poetry, and music communities. The panel will be of interest to artists, art educators, art historians and those interested in Detroit arts history, as well as documentary practices. Conference session summary is available here. Presentations: Sandra Schemske: Video presentation: \u27Time and Place: Art of Detroit\u27s Cass Corridor from the Wayne State University Art Collection\u27 (not available in DigitalCommons@WayneState) Dr. Joseph Turrini: Training Oral Historians for the Cass Corridor Documentation Project (not available in DigitalCommons@WayneState) Dennis Nawrocki: \u27MĂ©nage À Detroit’: Three Generations of Expressionist Art in Detroit 1970-2012 Gilda Snowden: Documenting the local gallery scene on YouTube Monika Berenyi: The Detroit City Poetry Project Diane Sybeldon: From the Library...: Collecting, Documenting and Sharing Detroit Arts Culture In and Around Wayne State, 1960s-1980

    Lightweight two-stroke cycle aircraft diesel engine technology enablement program, volume 1

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    An experimental Single Cylinder Test Engine Program is conducted to confirm the analytically projected performance of a two-stroke cycle diesel engine for aircraft applications. The test engine delivered 78kW indicated power from 1007cc displacement, operating at 3500 RPM on Schnuerle loop scavenged two-stroke cycle. Testing confirms the ability of a proposed 4-cylinder version of such an engine to reach the target power at altitude, in a highly turbocharged configuration. The experimental program defines all necessary parameters to permit design of a multicylinder engine for eventual flight applications; including injection system requirement, turbocharging, heat rejection, breathing, scavenging, and structural requirements. The multicylinder engine concept is configured to operate with an augmented turbocharger, but with no primary scavenge blower. The test program is oriented to provide a balanced turbocharger compressor to turbine power balance without an auxiliary scavenging system. Engine cylinder heat rejection to the ambient air has been significantly reduced and the minimum overall turbocharger efficiency required is within the range of commercially available turbochargers. Analytical studies and finite element modeling is made of insulated configurations of the engines - including both ceramic and metallic versions. A second generation test engine is designed based on current test results

    Lightweight two-stroke cycle aircraft diesel engine technology enablement program, volume 2

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    An experimental Single Cylinder Test Engine Program is conducted to confirm the analytically projected performance of a two-stroke cycle diesel engine for aircraft applications. Testing confirms the ability of a proposed 4-cylinder version of such an engine to reach the target power at altitude in a highly turbocharged configuration. The experimental program defines all necessary parameters to permit a design of a multicylinder engine for eventual flight applications

    Quantitative copper measurement in oxidized p-type silicon wafers using microwave photoconductivity decay

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    We propose a method to measure trace copper contamination in p-type silicon using the microwave photoconductivity decay (ÎŒ-PCD) technique. The method is based on the precipitation of interstitial copper, activated by high-intensity light, which results in enhanced minority carrier recombination activity. We show that there is a quantitative correlation between the enhanced recombination rate and the Cu concentration by comparing ÎŒ-PCD measurements with transient ion drift and total reflection x-ray fluorescence measurements. The results indicate that the method is capable of measuring Cu concentrations down to 10exp10cm−3. There are no limitations to wafer storage time if corona charge is used on the oxidized wafer surfaces as the charge prevents copper outdiffusion. We briefly discuss the role of oxide precipitates both in the copperprecipitation and in the charge carrier recombination processes.Peer reviewe

    Kinetic Energy Release Distributions for Câș₂ Emission from Multiply Charged C₆₀ and C₇₀ Fullerenes

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    We present asystematic study of experimental kinetic energy release distributions for the asymmetric fission processes Cq+60 C(iq-1\u3c)+70+ C+2 and C q+70 C(q-1)+60+ C+ 2 for mother ions incharge states q 4-8 produced incollisions with slow highly charged ions. Somewhat to our surprise, we find that the KERD for asymmetric fission from Cq+60 are considerably wider and have larger most likely values than the Cq+70 distributions inthe corresponding charge states when q \u3e 4

    Projected SO(5) Hamiltonian for Cuprates and Its Applications

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    The projected SO(5) (pSO(5)) Hamiltonian incorporates the quantum spin and superconducting fluctuations of underdoped cuprates in terms of four bosons moving on a coarse grained lattice. A simple mean field approximation can explain some key feautures of the experimental phase diagram: (i) The Mott transition between antiferromagnet and superconductor, (ii) The increase of T_c and superfluid stiffness with hole concentration x and (iii) The increase of antiferromagnetic resonance energy as sqrt{x-x_c} in the superconducting phase. We apply this theory to explain the ``two gaps'' problem found in underdoped cuprate Superconductor-Normal- Superconductor junctions. In particular we explain the sharp subgap Andreev peaks of the differential resistance, as signatures of the antiferromagnetic resonance (the magnon mass gap). A critical test of this theory is proposed. The tunneling charge, as measured by shot noise, should change by increments of Delta Q= 2e at the Andreev peaks, rather than by Delta Q=e as in conventional superconductors.Comment: 3 EPS figure

    Two-Center Interference in p-H2 Electron-Transfer Collisions

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    We report on measurements of transfer excitation in collisions of 0.3-1.3 MeV protons with spatially oriented H2 molecules. Evidences of two center interference are found in the angular distribution of the molecule after a transfer excitation process and directly in the projectile angular scattering distributions. These features can be explained in a way which is analogous to that for the interferences in Young\u27s classical double slit experiment: The fast projectiles preferentially capture electrons close to either of the molecular nuclei, and thereby they change their momenta and de Broglie wavelengths. The waves emerging from the two \u27slits\u27 of the molecule interfere yielding the observed interference structure

    Evidence of Wave-Particle Duality for Single Fast Hydrogen Atoms

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    We report the direct observation of interference effects in a Young\u27s double-slit experiment where the interfering waves are two spatially separated components of the de Broglie wave of single 1.3 MeV hydrogen atoms formed close to either target nucleus in H++H2 electron-transfer collisions. Quantum interference strongly influences the results even though the hydrogen atoms have a de Broglie wavelength, λdB, as small as 25 fm
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