نتایج جستجو برای: reflecting mirror
تعداد نتایج: 69005 فیلتر نتایج به سال:
The article presents the results of a study characteristics space parabolic mirror with deployable reflector. A model reflector truss structure formed by two asymmetric networks tension cables is presented. Three variants sparse reflecting film are presented, differing in periodically repeating hexagonal holes different sizes. complex electrodynamic modeling radiation antenna developed truss-be...
We consider extending visibility polygon (V P ) of a given point q (V P (q)), inside a simple polygon P by converting some edges of P to mirrors. We will show that several variations of the problem of finding mirror-edges to add at least k units of area to V P (q) are NP-complete, or NP-hard. Which k is a given value. We deal with both single and multiple reflecting mirrors, and also specular o...
Mirror Self-Recognition (MSR) unveils complex cognitive, social and emotional skills and it has been found only in humans and few other species, such as great apes, dolphins, elephants and magpies. In this pilot study, we tested if horses show the capacity of MSR. Four subjects living socially under naturalistic conditions were selected for the experiment. We adopted the classical mark test, wh...
Electromagnetic wave frequency upshifting upon reflection from a relativistic mirror (the double Doppler effect) can be used for the generation of coherent high-frequency radiation. The reflected high-frequency pulse inherits the coherence, polarization, and temporal shape from the original laser pulse. A partly reflecting relativistic mirror (flying mirror) can be formed by a breaking wake wav...
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