What is commensurable?
Measurable in terms of the same units. For example, a 20-centimetre length is
commensurable with a 1-meter length as both can be measured in centimetres, but
the length of a side and that of a diagonal of a square are not commensurable.
What is Greenwich Mean
Time?
The sun transits through all points on a meridian, hence
every point on an E-W line has a different noon time, which gives the local time.
The earth may be thought of as divided in a zone each with a standard time based on
the local time of some meridian crossing the zone. Thus, each hour covers a time
extending across 150 of longitude. Noon at Greenwich is taken as
noon in the British Isles, Portugal, Morocco and a part of West Africa. Noon in
central Europe is at 1.00 pm. G.M.T.
What is Gyroscope?
A gyroscope is a rotating object that tends to maintain a fixed
orientation in space. For example, the axis of the rotation earth always points
in the same direction towards the Pole Star. A spinning top or a cyclist is
stable when moving at speed because of the gyroscopic effect.
What is Parseval’s
theorem?
The theorem of Fourier analysis states that Bessel’s
inequality holds as equality for a square-integrable function. The term is also
applied to extensions of this to any complete orthonormal sequence in a Hilbert
space, named after the French mathematician, Marc Antoine parseval de Chenes,
who had to flee France after he publicised poems critical of Napoleon.
What is Fathom?
A unit of length is used to measure the depth of water. It is equal
to 6 feet (1.8288 m)
What is goodness to
fit?
The extent to which observed sample values of a variable
approximate the value derived from a theoretical distribution.
What are Hamming codes?
A class of efficient error correcting codes, usually binary
codes, that allow the recipient to diagnose and correct a certain number of
transmission errors per word, with the change of a high proportion of errors being
negligible.
What is a Heuristic?
It is based on trial and error, for example, some techniques
in iterative calculations.
What is Histogram?
A statistical graph that represents, by the height of a
rectangular column, the number of times that each class of result occurs in a
sample or experiment.
What is Hypocycloid?
A curve is described as a point on the circumference of a circle
as it rolls around the inside of another fixed coplanar circle. The form
depends on the ratio of the radii of the circles.
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