نتایج جستجو برای: relative biological radiation effectiveness

تعداد نتایج: 1345630  

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2014
Eugene Surdutovich A V Solov'yov

This is a review of a multiscale approach to the physics of ion-beam cancer therapy, an approach suggested in order to understand the interplay of a large number of phenomena involved in the radiation damage scenario occurring on a range of temporal, spatial, and energy scales. We describe different effects that take place on different scales and play major roles in the scenario of interaction ...

Introdution: A careful study of the physical and biological properties of helium ion radiation on the various cell lines is essential for the treatment planning. In this study, the biological response of several different cell lines has been investigated in 4He ions. Methods: Physical dose profiles and Linear Energy Transfer (LET) calculations were performed using the Monte Carlo Geant4 code. ...

2014
Y. Lai S. Pirotta G. Urbinati D. Gerace M. Galli M. Minkov V. Savona A. Badolato

2007
Mani Hossein-Zadeh Kerry J. Vahala

We investigate the impact of the intrinsicof the resonant poles on the performance of multiring-based optical filters and dispersion-compensating devices. We highlight the role of quality factor by defining figures-of-merit for some specific filter configurations.

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2011
Cosmas Mafusire Andrew Forbes

We outline a theory for the calculation of the beam quality factor of an aberrated laser beam. We provide closed-form equations that show that the beam quality factor of an aberrated Gaussian beam depends on all primary aberrations except tilt, defocus, and x-astigmatism. The model is verified experimentally by implementing aberrations as digital holograms in the laboratory.

Journal: :Journal of applied physics 2010
John E Sader Jungchul Lee Scott R Manalis

Energy dissipation experienced by vibrating microcantilever beams immersed in fluid is strongly dependent on the mode of vibration, with quality factors typically increasing with mode number. Recently, we examined energy dissipation in a new class of cantilever device that embeds a microfluidic channel in its interior-the fundamental mode of vibration only was considered. Due to its importance ...

Journal: :Physical review letters 2007
V A Fedotov M Rose S L Prosvirnin N Papasimakis N I Zheludev

We report that a resonance response with a very high quality factor can be achieved in a planar metamaterial by introducing symmetry breaking in the shape of its structural elements, which enables excitation of trapped modes, i.e., modes that are weakly coupled to free space.

2012
Sanjay Kumar Dubey Anubha Gulati Ajay Rana

Over the past few decades, Usability has emerged as an extremely important quality factor. Many methods have so far been proposed for usability evaluation but they lack in one way or another. This paper proposes a method for software usability quantification using the fuzzy multiple criteria weighted average approach. This approach has been chosen due to the highly unpredictable nature of the a...

Journal: :Health physics 1976
R Katz B G Fullerton R A Roth S C Sharma

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