Results 51 to 60 of about 340,877 (291)

Secondary and compound concentrators for parabolic dish solar thermal power systems [PDF]

, 1981
A secondary optical element may be added to a parabolic dish solar concentrator to increase the geometric concentration ratio attainable at a given intercept factor.
Jaffe, L. D., Poon, P. T.
core   +2 more sources

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source

The Power and Efficiency Analyses of the Cylindrical Cavity Receiver on the Solar Stirling Engine

Energies, 2020
The technique of solar dish and Stirling engine combination is the most challenging and promising one. For the efficient conversion of the externally concentrated heat to the usable power, we studied the influences of the wall temperature, inclination ...
Ji-Qiang Li, Jeong-Tae Kwon, Seon-Jun Jang   +2 more
doaj   +1 more source

A direct measure of free electron gas via the Kinematic Sunyaev-Zel'dovich effect in Fourier-space analysis

, 2018
We present the measurement of the kinematic Sunyaev-Zel'dovich (kSZ) effect in Fourier space, rather than in real space. We measure the density-weighted pairwise kSZ power spectrum, the first use of this promising approach, by cross-correlating a cleaned
Okumura, Teppei, Spergel, David N., Sugiyama, Naonori S.   +2 more
core   +1 more source

Tracing PAHs and Warm Dust Emission in the Seyfert Galaxy NGC 1068 [PDF]

, 2007
We present a study of the nearby Seyfert galaxy NGC 1068 using mid- and far- infrared data acquired with the IRAC, IRS, and MIPS instruments aboard the Spitzer Space Telescope.
Aaron S. Evans, Allain T., Barry F. Madore, Ben H. P. Chan, Bernhard Schulz, Bland-Hawthorn J., Catherine M. Ishida, Clavel J., Combes F., David B. Sanders, David T. Frayer, Dong-Chan Kim, Fath E. A., Greg Bothun, Jason A. Surace, Joseph B. Jensen, Joseph M. Mazzarella, Justin H. Howell, Kevin Xu, Lee Armus, Morganti R., P. N. Appleton, Packham C., Roche P. F., Steven Lord, Sylvain Veilleux, Tatjana Vavilkin, Unger S. W., Voit G. M.   +28 more
core   +2 more sources

Tailoring Functional Properties of Ti–Ni–Cu Shape Memory Alloy Thin Films for MEMS Actuators

Advanced Engineering Materials, EarlyView.
A comprehensive study of critical parameters required to develop well‐performing Ti–Ni–Cu thin film shape memory alloy microactuators is provided. Materials science and device integration aspects are integrated by addressing structural and physical relationships using complementary characterization techniques as well as a practical fabrication solution
Elaheh Akbarnejad, Aleksander Kostka, Gowtham Arivanandhan, Yujiao Li, Alan Savan, Manfred Kohl, Alfred Ludwig   +6 more
wiley   +1 more source

Deployment of a Secondary Concentrator to Increase the Intercept Factor of a Dish with Large Slope Errors [PDF]

, 1984
The testing of a hyperbolic trumpet non-imaging secondary concentrator with a parabolic dish having slope errors of about 10 mrad is reported. The trumpet, which has a concentration ratio of 2.1, increased the flux through a 141-mm focal aperture by 72%,
Gray, E., Ogallagher, J. J., Ortabasi, U.   +2 more
core   +1 more source

Herschel Far-Infrared and Sub-millimeter Photometry for the KINGFISH Sample of Nearby Galaxies [PDF]

, 2011
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH) sample.
A. D. Bolatto, A. E. Miller, A. F. Crocker, A. K. Leroy, Aguirre, B. A. Groves, B. D. Johnson, B. R. Brandl, B. T. Draine, Benford, Bolatto, C. D. Wilson, C. W. Engelbracht, C.-N. Hao, D. A. Dale, D. Calzetti, Dale, Dale, Dale, Dale, Draine, Draine, E. J. Montiel, E. J. Murphy, E. Schinnerer, Engelbracht, F. S. Tabatabaei, F. Walter, Finkbeiner, G. Aniano, G. Helou, H. Roussel, H.-W. Rix, J. Koda, J. L. Hinz, J.-D. T. Smith, K. D. Gordon, K. M. Sandstrom, K. V. Croxall, Kennicutt, Kovács, L. Armus, L. K. Hunt, Li, M. G. Wolfire, M. Galametz, M. Sauvage, Moustakas, N. Rahman, O. Krause, Ott, P. Beirão, P. N. Appleton, Pascale, Pilyugin, R. A. Skibba, R. C. Kennicutt, Roussel, S. E. Meidt, S. Zibetti, Schlegel, Skibba, Smith, Walter, Walter, Weingartner, Y. Li   +66 more
core   +4 more sources

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Design of Truncated Hyperboloid Solar Concentrator by Using Zemax Program

Ibn Al-Haitham Journal for Pure and Applied Sciences, 2022
A hyperboloid solar concentrator (HSC) was designed with a truncation angle side to the entrance aperture by simulation in the Zemax Optical Design software.
Hassanein Nouri Hamza, Alaa Badr Hasan
doaj   +1 more source