نتایج جستجو برای: rotation

تعداد نتایج: 72251  

2007
Hiroshi Kimura

A new polarimetric calibration method using polarization orientation angle shifts at built-up areas and standard calibrators is studied. Calibration matrices were derived from datasets of the Gifu and the JAXA Tomakomai calibration sites, which are almost the same as those by JAXA. Faraday rotation angels in observed datasets can be estimated. Two estimated Faraday rotation angles were reasonable.

2012
R. Zhao L. Zhang J. Zhou C. M. Soukoulis

R. Zhao,1,2 L. Zhang,1 J. Zhou,3 Th. Koschny,1,4 and C. M. Soukoulis1,4 1Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA 2Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China 3Centre for Integrated Nanotechnologies, Materials Physics & Applications Division, Los Alamos National...

1997
Nicole P. Vogt Andrew C. Phillips S. M. Faber Jesús Gallego Caryl Gronwall R. Guzmán Garth D. Illingworth David C. Koo J. D. Lowenthal

Moderate-resolution spectroscopic observations from the Keck 10m telescope are used to derive internal kinematics for eight faint disk galaxies in the fields flanking the Hubble Deep Field. The spectroscopic data are combined with high–resolution F814W WFPC2 images from the Hubble Space Telescope which provide morphologies and scale-lengths, inclinations and orientations. The eight galaxies hav...

2016
Rodica Caprita Adrian Caprita

Starch is the most important digestible polysaccharide present in foods and feeds. The starch concentration in cereals cannot be determined directly, because the starch is contained within a structurally and chemically complex matrix. Fine grinding and boiling in dilute HCl are preparative steps necessary for complete release of the starch granules from the protein matrix. Starch can be determi...

1999
A. Cavallini

We have studied by electrical and optical methods the properties of the defects to possibly identify which ones affect the luminescence of the material. We have characterized Er-doped Si samples grown by the Liquid Phase Epitaxy (LPE) method, a relatively simple and inexpensive technique, by means of photoluminescence (PL), cathodoluminescence, EXAFS and deep level transient spectroscopy. The o...

2002
Alexander B. Balakin José P. S. Lemos

We study optical activity induced by curvature. The optical activity model we present has two phenomenological gyration parameters, within which we analyze three model cases, namely, an exactly integrable model, the Landau-Lifshitz model and the Fedorov model, these latter two are solved in the short wavelength approximation. The model background is a gravitational pp-wave. The solutions show t...

2009
Pedro Bargueño Isabel Gonzalo Ricardo Pérez de Tudela

A proposal is made to measure the parity-violating energy difference between enantiomers of chiral molecules by modifying the dynamics of the two-state system using an external chiral field, in particular, circularly polarized light. The intrinsic molecular parity-violating energy could be compensated by this external chiral field, with the subsequent change in the optical activity. From the ob...

1995
Elena Georgieva

Fresnel reflection amplitude coefficients (fractional amplitudes) at the surface of an isotropic, intrinsically nonmagnetic chiral medium are derived on the basis of the Drude–Condon model of optical activity. The eigenvalue–eigenvector solution is obtained with use of Berreman’s 4 3 4 matrix method. Self-consistent results are obtained when the calculations are based on a new 4 3 4 matrix for ...

2005
Ju-Yi Lee Der-Chin Su

An improved common-path optical heterodyne interferometry for measuring small optical rotation angle of chiral liquid is presented. The optical rotation angle can be determined by the phase difference between the test and reference signals. By means of inserting a phase retarder behind the test sample, the measuring resolution of optical rotation angle is greatly enhanced. The theoretical predi...

2008
A. Noutsos S. Johnston M. Kramer A. Karastergiou

We measured a sample of 150 pulsar Rotation Measures (RMs) using the 20-cm receiver of the Parkes 64-m radio telescope. 46 of the pulsars in our sample have not had their RM values previously published, whereas 104 pulsar RMs have been revised. We used a novel quadratic fitting algorithm to obtain an accurate RM from the calibrated polarisation profiles recorded across 256 MHz of receiver bandw...

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