Connecting the shadows: probing inner disk geometries using shadows in transitional disks
نویسندگان
چکیده
منابع مشابه
Finding Shadows among Disks
Given a set of n non-overlapping unit disks in the plane, a line ` is called blocked if it intersects at least one of the disks and a point p is called a shadow point if all lines containing p are blocked. In addition, a maximal closed set of shadow points is called a shadow region. We derive properties of shadow regions, and present an O(n) algorithm that outputs all shadow regions. We prove t...
متن کاملInduction The dance of shadows
Statistics stems out from induction. Induction is a long lasting notion in philosophy. The nature of notions in philosophy are such that neither they can be solved completely nor one can leave them forever. One of the most important problem in induction is “the problem of induction”. In this paper we give a short history of induction and discuss some aspects of the problem of induction.
متن کاملDetecting object boundaries using focus, zoom, shadows, and active probing
Our goal is to give our robot the perceptual abilities it needs to actively resolve ambiguity in its environment, when the passive vision algorithms it uses fail. A key example of this is figure/ground separation [2]. By equipping our robot with a camera with a narrow, controllable depth of field, the robot can bring a questionable edge into focus and blur out distracting background. By giving ...
متن کاملDiffraction patterns in the shadows of disks and obstacles.
We compare the Fresnel diffraction pattern of a thin circular disk with that of a square obstacle, specifically evaluating the on-axis field strength. Photographs of the diffraction patterns reveal some curious features for the square obstacle. Second, the precise electric and magnetic fields behind a conducting circular disk are evaluated without invoking the Fresnel approximation and contrast...
متن کاملShadows.
We investigate the brightness distribution in and around outdoor shadows (for a variety of sky conditions) using modeling and field measurements. The dominant factor influencing the brightness of a shadow is the solid angle subtended by the object blocking the Sun. Occulters at the zenith that subtend a small solid angle cast shadows that are bright and possess a nearly uniform brightness acros...
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: Astronomy & Astrophysics
سال: 2017
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201730949