نتایج جستجو برای: dynamic nuclear polarisation

تعداد نتایج: 641526  

2016
Ane S. Fors Camilla Brekke Anthony P. Doulgeris Torbjørn Eltoft Angelika H. H. Renner Sebastian Gerland

In this study, we investigate the potential of sea ice segmentation by Cand X-band multi-polarisation synthetic aperture radar (SAR) features during late summer. Five highresolution satellite SAR scenes were recorded in the Fram Strait covering iceberg-fast first-year and old sea ice during a week with air temperatures varying around 0 C. Sea ice thickness, surface roughness and aerial photogra...

2008
Tsuyoshi NISHIOKA Hirokazu ISHIZUKA Toshio HASEGAWA

Circular type’ interferometric system for quantum key distribution is proposed. The system has naturally self-alignment and compensation of birefringence and also has enough efficiency against polarisation dependence. Moreover it is easily applicable to multi-party. Key creation with 0.1 photon per pulse at a rate of 1.2KHz with a 5.4% QBER over a 200m fiber was realized. Quantum key distributi...

2005
Giancarlo de Gasperis Amedeo Balbi Paolo Cabella Paolo Natoli

We present ROMA, a parallel code to produce joint optimal temperature and polarisation maps out of multidetector CMB observations. ROMA is a fast, accurate and robust implementation of the iterative generalised least squares approach to map-making. We benchmark ROMA on realistic simulated data from the last, polarisation sensitive, flight of BOOMERanG.

2001
Holger Gies Christian Schubert

The string-inspired technique is used for a first calculation of the one-loop axialvector vacuum polarisation in a general constant electromagnetic field. A compact result is reached for the difference between this tensor and the corresponding vector vacuum polarisation. This result is confirmed by a Feynman diagram calculation. Its physical relevance is briefly discussed.

Journal: :The British journal of ophthalmology 2005
M Centofanti F Oddone M Parravano L Gualdi M G Bucci G Manni

AIM To evaluate changes in corneal polarisation properties and their influence on peripapillary retinal nerve fibre layer (RNFL) thickness measurements after laser assisted in situ keratomileusis (LASIK) by means of scanning laser polarimetry (SLP) with variable corneal polarisation compensator (VCC) in normal white subjects. METHODS SLP was performed by means of GDx VCC on 32 eyes of 32 norm...

2003
Carlo Baccigalupi

We review the present knowledge of the diffuse Galactic synchrotron emission in polarisation. At microwave frequencies, we assess the expected contamination to the CMB polarisation angular power spectrum, for E and B modes, as expected after the WMAP first year measurements.

Journal: :Optics express 2013
Daba Radnatarov Sergey Khripunov Sergey Kobtsev Aleksey Ivanenko Sergey Kukarin

The present work demonstrates a fibre-laser system with automatic electronic-controlled triggering of dissipative soliton generation mode. Passive mode locking based on the effect of non-linear polarisation evolution has been achieved through a polarisation controller containing a single low-voltage liquid crystal plate whose optimal wave delay was determined from analysis of inter-mode beat sp...

2004
Guo-Chin Liu Antonio da Silva

We present the estimates of the Cosmic Microwave Background (CMB) polarisation power spectrum from galaxy clusters and filaments using hydrodynamical simulations of large scale structure formation. We focus in the present study on the CMB Quadrupole induced polari-sation, which is the dominate secondary polarisation effect, and give the E and B mode power spectra between l ∼ 560 to 20000.

Journal: :Current Biology 2012
S. E. Temple V. Pignatelli T. Cook M. J. How T.-H. Chiou N. W. Roberts N. J. Marshall

Figure 1. High-resolution polarisation vision in Sepia plangon improves image contrast. (A) S. plangon responded to looming stimuli that differed in angle of polarisation from the background with an innate deimatic diplay (brightening of body colour). Left portion = pre-stimulus; right portion = post stimulus. (B) Normalized response strength (see Supplemental Information for further details) d...

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