نتایج جستجو برای: small fields

تعداد نتایج: 1010559  

Journal: :Astronomy and Astrophysics 2010

Journal: :IEEE Transactions on Communications 2014

Journal: :Advances in Mathematics of Communications 2023

Let $ C be a (n,q^{2k},n-k+1)_{q^2} additive MDS code which is linear over {\mathbb F}_q $. We prove that if n \geq q+k and k+1 of the projections are F}_{q^2} then use this geometrical theorem, other geometric arguments some computations to classify all codes for q \in \{4,8,9\} also longest F}_{16} F}_4 In these cases, classifications not only verify conjecture codes, but confirm there no non...

Journal: :Magnetic resonance imaging 2005
Robert G Bryant Jean-Pierre Korb

Proton nuclear spin-lattice relaxation in biological systems is generally distinguished from that in inorganic systems such as rocks by the presence of locally disordered macromolecular environments. Rapid exchange of readily observed labile small molecules among differently oriented macromolecular sites generally nearly averages the spectral anisotropies in the small molecule resonances. The b...

2007
R. J. Rutten

Context. The footpoints of quiet Sun Transition Region (TR) loops do not seem to coincide with the photospheric magnetic structures appearing in traditional low-sensitivity magnetograms. Aims. To look for the so-far unidentified photospheric footpoints of TR loops using G-band bright points (BPs) as proxies for photospheric magnetic field concentrations. Methods. Comparison of TR measurements w...

Asghar Mesbahi, H. Dadgar,

Background: Accurate dose calculations in small beamlets and lung material have been a great challenge for most of treatment planning systems (TPS).  In the current study, the dose calculation accuracy of TiGRT TPS was evaluated for small beamlets in water and lung phantom by comparison to Monte Carlo (MC) calculations. Materials and Methods: The head of Siemens Oncor-impression linac...

Journal: :journal of biomedical physics and engineering 0
s a rahimi tarbiat modares university b hashemi tarbiat modares university s r mahdavi iran university of medical sciences

background: estimating dosimetric parameters for small fields under non-reference conditions leads to significant errors if done based on conventional protocols used for large fields in reference conditions. hence, further correction factors have been introduced to take into account the influence of spectral quality changes when various detectors are used in non-reference conditions at differen...

Background: Estimating dosimetric parameters for small fields under non-reference conditions leads to significant errors if done based on conventional protocols used for large fields in reference conditions. Hence, further correction factors have been introduced to take into account the influence of spectral quality changes when various detectors are used in non-reference conditions at differen...

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