نتایج جستجو برای: equivalent radius

تعداد نتایج: 184473  

Journal: :Applied optics 1998
A M Nilsson P Alsholm A Karlsson S Andersson-Engels

The electromagnetic far field, as well as the near field, originating from light interaction with a red blood cell (RBC)volume-equivalent spheroid, was analyzed by utilizing theT-matrix theory. This method is a powerful tool thatmakes it possible to study the influence of cell shape on the angulardistribution of scattered light. General observations were that thethree-dimensional shape, as well...

Journal: :فیزیک زمین و فضا 0
مریم قرایلو مؤسسه ژئوفیزیک دانشگاه تهران، دانشجوی دکتری عباسعلی علی اکبری بیدختی مؤسسه ژئوفیزیک دانشگاه تهران، استاد مجید مزرعه فراهانی مؤسسه ژئوفیزیک دانشگاه تهران، استادیار

cumulus parameterization in numerical weather prediction models can significantly affect severe weather forecasts, such as hurricanes, flash floods, and winter storms. the role of convection is essential in stabilizing an unstable atmosphere through vertically transferring moisture, energy, chemical species and momentum. cumulus parameterization schemes use simple one-dimensional convective clo...

Journal: :Physical review 2022

Circular photon orbits and black hole shadows are significantly important issues in physics astronomy, a number of breakthroughs have been witnessed recent years. Conventionally, the stable unstable circular obtained using effective potential test particles moving spacetime. In this work, pure geometric approach is developed to calculate these shadow radius. Furthermore, it can be proved that o...

2000
R. Zweifel R. Häsler

Temporal and spatial patterns of stem and root radius changes were continuously measured on mature, subalpine Norway spruce (Picea abies (L.) Karst.) over 2 years. In addition, freezing experiments with stem segments of saplings were carried out in a climate chamber. The dynamics of the radius fluctuations were analyzed in relation to temperature profiles of air, bark, and soil. We found that b...

2014
S. J. Schoonmaker

This paper presents investigations of two special cases of dynamic valve analysis. These special cases arose in the development of a new type of gas field reciprocating compressor. These special cases were for a moving frame of reference (since the discharge valves were integral with the piston) , and for independent mass damping {sealing/damping elements are modelled separately instead of as "...

Journal: :IEEE Trans. Pattern Anal. Mach. Intell. 1995
Marcel Worring Arnold W. M. Smeulders

The digitization of a circular arc causes an inherent loss of geometrical information. Arcs with slightly different local curvature or position may lead to exactly the same digital pattern. In this paper we give a characterization of all centers and radii of circular arcs yielding the same digitization pattern. The radius of the arcs varies over the set. However, only one curvature or radius es...

Journal: :Journal of vision 2006
Patricia Rosales Michiel Dubbelman Susana Marcos Rob van der Heijde

We present a comparison between measurements of the radius of the anterior and posterior lens surface, which was performed using corrected Scheimpflug imaging and Purkinje imaging in the same group of participants (46 for the anterior lens, and 34 for the posterior lens). Comparisons were also made as a function of accommodation (0 to 7 D) in a subset of 11 eyes. Data were captured and processe...

1998
James C. Liu C. S. Sims

~ The high temperature peaks (TL peaks 6-7) of TLD-600 are known to have higher responses to high LET radiation than to low LET radiation. These high temperature peak characteristics were studied for the automatic readerannealed Harshaw albedo neutron TLD. The high temperature peaks response is linear for neutrons over the dose equivalent range tested (0.05-3 mSv of a 252Cf source moderated by ...

Journal: :iranian journal of mathematical chemistry 2014
z. yarahmadi s. moradi

the center (periphery) of a graph is the set of vertices with minimum (maximum)eccentricity. in this paper, the structure of centers and peripheries of some classes ofcomposite graphs are determined. the relations between eccentricity, radius and diameterof such composite graphs are also investigated. as an application we determinethe center and periphery of some chemical graphs such as nanotor...

Journal: :Physical review 2022

In a recent work PRD 106, L021501 (2022), new geometric approach is proposed to obtain the photon sphere (circular orbit) and black hole shadow radius. this approach, spheres radius are determined using geodesic curvature Gaussian in optical geometry of spacetimes. However, calculations (2022) only restricted subclass static spherically symmetric holes with spacetime metric $g_{tt} \cdot g_{rr}...

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