Flat lensing by periodic loss-modulated materials
نویسندگان
چکیده
منابع مشابه
modeling loss data by phase-type distribution
بیمه گران همیشه بابت خسارات بیمه نامه های تحت پوشش خود نگران بوده و روش هایی را جستجو می کنند که بتوانند داده های خسارات گذشته را با هدف اتخاذ یک تصمیم بهینه مدل بندی نمایند. در این پژوهش توزیع های فیزتایپ در مدل بندی داده های خسارات معرفی شده که شامل استنباط آماری مربوطه و استفاده از الگوریتم em در برآورد پارامترهای توزیع است. در پایان امکان استفاده از این توزیع در مدل بندی داده های گروه بندی ...
Gravitational Lensing Corrections in Flat ΛCDM Cosmology
We compute the deflection angle for a light ray traveling in a flat ΛCDM cosmology which encounters a completely condensed mass region to second order inm/r0 and first order inm/r0×Λr 2 0.We find that the most significant correction to the Einstein angle occurs not because of the non-linear terms but instead because the condensed mass is embedded in an expanding cosmology. We predict a decrease...
متن کاملPeriodic Flat Modules, and Flat Modules for Finite Groups
If R is a ring of coefficients and G a finite group, then a flat RG-module which is projective as an R-module is necessarily projective as an RG-module. More generally, if H is a subgroup of finite index in an arbitrary group Γ, then a flat RΓmodule which is projective as an RH-module is necessarily projective as an RΓ-module. This follows from a generalization of the first theorem to modules o...
متن کاملExplosive Dome Eruptions Modulated by Periodic Gas-Driven Inflation
Volcan Santiaguito (Guatemala) “breathes” with extraordinary regularity as the edifice’s conduit system accumulates free gas, which periodically vents to the atmosphere. Periodic pressurization controls explosion timing, which nearly always occurs at peak inflation, as detected with tiltmeters. Tilt cycles in January 2012 reveal regular 26 ± 6min inflation/deflation cycles corresponding to at l...
متن کاملWeak Lensing by Large Scale Structure in Open , Flat , and Closed Universes
Weak lensing is the distortion (polarization) of images of distant objects, such as high redshift galaxies, by gravitational elds in the limit where the distortion is small. Gravitational potential uctuations due to large scale structure cause correlated distortions of the images of high redshift galaxies. These distortions are observable with current large telescopes and instrumentation. In a ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of the Optical Society of America B
سال: 2013
ISSN: 0740-3224,1520-8540
DOI: 10.1364/josab.30.002684