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Homonymous denotes a condition which affects the same portion of the visual field of each eye. [4]Homonymous inferior quadrantanopia is a loss of vision in the same lower quadrant of visual field in both eyes whereas a homonymous superior quadrantanopia is a loss of vision in the same upper quadrant of visual field in both eyes.
A large frame quadrant at the Beijing Ancient Observatory.It was constructed in 1673. A quadrant is an instrument used to measure angles up to 90°.Different versions of this instrument could be used to calculate various readings, such as longitude, latitude, and time of day.
The following is a list of centroids of various two-dimensional and three-dimensional objects. The centroid of an object in -dimensional space is the intersection of all hyperplanes that divide into two parts of equal moment about the hyperplane.
Three axial planes (x=0, y=0, z=0) divide space into eight octants.The eight (±,±,±) coordinates of the cube vertices are used to denote them. The horizontal plane shows the four quadrants between x- and y-axis.
A mural instrument that measured angles from 0 to 90 degrees was called a mural quadrant. They were utilized as astronomical devices in ancient Egypt and ancient Greece . Edmond Halley , due to the lack of an assistant and only one vertical wire in his transit , confined himself to the use of a mural quadrant built by George Graham after its ...
Signs of trigonometric functions in each quadrant. In the above graphic, the words in quotation marks are a mnemonic for remembering which three trigonometric functions (sine, cosine and tangent) are positive in each quadrant. The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper right quadrant, we see ...
The Quadrans Vetus. Medici collections, Museo Galileo The Quadrans Vetus is a medieval astronomical instrument.. Known as the quadrans vetus ["old quadrant"], the three surviving medieval examples are in the Museo Galileo in Florence, [1] the Museum of the History of Science in Oxford, [2] and the British Museum in London.
He invented a new and improved davit for lowering boats on board ship, a quadrant davit for double-banked boats which simply became known as the Welin davit. The RMS Titanic was equipped with Welin davits, [1] and after the disaster the demand for his product skyrocketed. He was awarded the John Scott Medal of The Franklin Institute in 1911. He ...