Search results
Results From The WOW.Com Content Network
Orbital phasing is primarily used in scenarios where a spacecraft in a given orbit must be moved to a different location within the same orbit. The change in position within the orbit is usually defined as the phase angle, ϕ, and is the change in true anomaly required between the spacecraft's current position to the final position.
The Philippines was among the first Asian countries to phase-out incandescent light bulbs. In February 2008, president Gloria Macapagal Arroyo called for a ban of incandescent light bulbs by 2010 in favor of more energy-efficient fluorescent globes to help cut greenhouse gas emissions and household costs during her closing remarks at the ...
In each image point, the phase-shift image displays the quantified phase shift induced by the object, which is proportional to the optical thickness of the object. [10] In this way measurement of the associated optical field can remedy the halo artifacts associated with conventional phase contrast by solving an optical inverse problem to ...
X-ray absorption (left) and differential phase-contrast (right) image of an in-ear headphone obtained with a grating interferometer at 60kVp. Phase-contrast X-ray imaging or phase-sensitive X-ray imaging is a general term for different technical methods that use information concerning changes in the phase of an X-ray beam that passes through an object in order to create its images.
The rays which pass through the phase object will diffract as a function of the index of refraction of the medium and diverge as shown by the dotted lines in the figure. The objective lens collimates this light, while focusing the so-called 0-order light, that is, the portion of the beam unaltered by the phase object (solid lines).
Between 2010 and 2019, the number of public policies intended to phase out plastic carryout bags tripled. [7] As of 2024, such bans have been introduced in 103 countries, with varying degrees of enforcement, and 32 countries instead impose a charge per bag. Bans and charges have also been enacted by some jurisdictions at the sub-national level.
In a system consisting of ice and water in a glass jar, the ice cubes are one phase, the water is a second phase, and the humid air is a third phase over the ice and water. The glass of the jar is a different material, in its own separate phase. (See state of matter § Glass.)
In astronomy, a phase curve describes the brightness of a reflecting body as a function of its phase angle (the arc subtended by the observer and the Sun as measured at the body). The brightness usually refers the object's absolute magnitude , which, in turn, is its apparent magnitude at a distance of one astronomical unit from the Earth and Sun.