Beamforming by scattering from an array of scatterers carried by a drone is explored. By positioning the vertical heights of the scatterers on the drone, beam focusing can be achieved in a desired direction. Various horizontal layouts of the scatterers on the drone can be used, with a “double-cross” layout used here for the case of 9 scatterers. The formation of a null in the pattern in a desired direction is also possible using optimization of the scatterer positions.
*Research paper presented during the 2021 National Radio Science Meeting
by Abraham Lincoln, Gettysburg, Pennsylvania, November 19, 1863
read by Neil Jerome A. Egarguin
From Wikipedia:
"The Gettysburg Address is a speech that U.S. President Abraham Lincoln delivered during the American Civil War at the dedication of the Soldiers' National Cemetery in Gettysburg, Pennsylvania, on the afternoon of November 19, 1863, four and a half months after the Union armies defeated those of the Confederacy at the Battle of Gettysburg. It is one of the best-known speeches in American history."
by Walt Whitman, 1865
read by Neil Jerome A. Egarguin
From Wikipedia:
"O Captain! My Captain!" is an extended metaphor poem written by Walt Whitman in 1865 about the death of U.S. President Abraham Lincoln. It is one of four poems written by Whitman about the death of Lincoln, the others being When Lilacs Last in the Dooryard Bloom'd, Hush'd be the Camps To-day, and This Dust was Once the Man. Immediately successful, the poem was Whitman's first to be anthologized and the most famous of his poems during Whitman's life.
The poem is written in a structure generally considered uncharacteristic of Whitman's poetry; it utilizes a rhyming pattern, has a song-like flow, uses a simple metaphor (that of the Ship of State), and has a narrator other than Whitman. These elements are likely what made the poem initially popular and well-received, and it was considered one of the greatest American poems through World War II. Critical consensus has since been generally negative towards "My Captain". Some critics consider the poem "conventional" and "trite", though it is still one of Whitman's most famous works. The poem has been referenced several times in popular culture, most notably in the film Dead Poets Society.