Results 71 to 80 of about 9,025,079 (233)

Prospects for ACT: simulations, power spectrum, and non-Gaussian analysis

, 2004
A new generation of instruments will reveal the microwave sky at high resolution.
Barger, Barger, Bennett, Birkinshaw, Bond, Borys, Carlstrom, Cooray, Cooray, da Silva, da Silva, Eales, Finkbeiner, Hamilton, Hirata, Holder, Holland, Hughes, Jain, Kevin M. Huffenberger, Knox, Komatsu, Kosowsky, Mason, Miralda-Escudé, Pen, Press, Refregier, Santos, Schlegel, Seljak, Seljak, Seljak, Smail, Song, Springel, Tegmark, Tegmark, Toffolatti, Totani, Trushkin, Uroš Seljak, White, White, Zaldarriaga, Zhang, Zhang, Zhou   +47 more
core   +1 more source

Inverse reflector design for a point source and far-field target

Journal of Computational Physics, 2020
We present a method for the design of a single freeform reflector that converts the light distribution of a point source to a desired light distribution in the far field.
L. Romijn, J. T. T. ten Thije Boonkkamp, W. IJzerman   +2 more
semanticscholar   +1 more source

Monitoring induced distributed double-couple sources using Marchenko-based virtual receivers

, 2019
We aim to monitor and characterize signals in the subsurface by combining these passive signals with recorded reflection data at the surface of the Earth.
Brackenhoff, Joeri, Thorbecke, Jan, Wapenaar, Kees   +2 more
core   +1 more source

On the multi-frequency inverse source problem in heterogeneous media

, 2012
The inverse source problem where an unknown source is to be identified from the knowledge of its radiated wave is studied. The focus is placed on the effect that multi-frequency data has on establishing uniqueness.
Acosta, Sebastian, Chow, Sum, Taylor, James, Villamizar, Vianey   +3 more
core   +1 more source

Test method for telescopes using a point source at a finite distance [PDF]

A test method for telescopes that makes use of a focused ring formed by an annular aperture when using a point source at a finite distance is evaluated theoretically and experimentally.
Griner, D. B., Korsch, D., Zissa, D. E.
core   +1 more source

Catalog Extraction in SZ Cluster Surveys: a matched filter approach

, 2006
We present a method based on matched multifrequency filters for extracting cluster catalogs from Sunyaev-Zel'dovich (SZ) surveys. We evaluate its performance in terms of completeness, contamination rate and photometric recovery for three representative ...
Angulo, Barbosa, Bartelmann, Benson, Bertin, Blanchard, Borys, Carlstrom, Colafrancesco, Cole, da Silva, Diego, Eisenstein, Eke, Freedman, Haehnelt, Haiman, Herranz, Herranz, Hobson, Holder, Hu, Huetsi, J. Delabrouille, J. G. Bartlett, J.-B. Melin, Jenkins, Jones, Kneissl, Knox, Lima, Lima, Majumdar, Melin, Mohr, Motl, Oukbir, Pierpaoli, Pires, Rosati, Schulz, Schäfer, Seljak, Spergel, Vale, Waldram, Wang, Weller, White   +48 more
core   +3 more sources

A Semianalytical Method of Frequency-average Smearing for Radio Interferometers based on Point Source

The Astronomical Journal
Next-generation radio interferometers, with their enhanced spatial, temporal, and high-frequency resolution, will pose considerable challenges to data processing and storage. Frequency averaging reduces the volume of data, but would cause smearing of the
Weijie Liang, Yangfan Xie, Feng Wang, Hui Deng, Ying Mei, Yunjin Zhu, Shoulin Wei   +6 more
doaj   +1 more source

Vibration diagnosis method of multistage gearing to point out ghost noise source with amplitude fluctuation analysis

Nihon Kikai Gakkai ronbunshu, 2015
Ground gears sometimes brings ‘ghost noise’ whose frequency is non-integer order of mesh frequency and the cause of ghost noise is surface undulation due to manufacturing process. But the undulation is slight and it becomes difficult to detect with tooth
Shigeki MATSUMURA, Haruo HOUJOH
doaj   +1 more source

Improving meson two-point functions by low-mode averaging

, 2004
Some meson correlation functions have a large contribution from the low lying eigenmodes of the Dirac operator. The contribution of these eigenmodes can be averaged over all positions of the source.
DeGrand, DeGrand, DeGrand, Giusti, Neuberger, S. Schaefer, T. DeGrand   +6 more
core   +2 more sources

Study on the delineation method of riverine water source protection zones in the Qujiang River Basin

Guan'gai paishui xuebao
【Background】River-type water sources are widely distributed in China and serve as the primary source of drinking water. Over the past decades, the proportion of non-compliant water sources has decreased due to effective control of point-source pollution.
ZHANG Jing, CAI Guanjie, LIU Junzheng, ZHANG Xinhua, MA Bing, SUN Tao, Yasmina TIR   +6 more
doaj   +1 more source