Bessel
Encyclopedia
Bessel may refer to:
Bessel is the name of:
- Bessel beamBessel beamA Bessel beam is a field of electromagnetic, acoustic or even gravitational radiation whose amplitude is described by a Bessel function of the first kind. A true Bessel beam is non-diffractive. This means that as it propagates, it does not diffract and spread out; this is in contrast to the usual...
- Bessel ellipsoidBessel ellipsoidThe Bessel ellipsoid is an important reference ellipsoid of geodesy. It is currently used by several countries for their national geodetic surveys, in Europe and on other continents, but will be replaced in the next decades by modern ellipsoids of satellite geodesy.The Bessel ellipsoid was derived...
- Bessel functionBessel functionIn mathematics, Bessel functions, first defined by the mathematician Daniel Bernoulli and generalized by Friedrich Bessel, are canonical solutions y of Bessel's differential equation:...
in mathematics - Bessel's inequalityBessel's inequalityIn mathematics, especially functional analysis, Bessel's inequality is a statement about the coefficients of an element x in a Hilbert space with respect to an orthonormal sequence....
in mathematics - Bessel filterBessel filterIn electronics and signal processing, a Bessel filter is a type of linear filter with a maximally flat group delay . Bessel filters are often used in audio crossover systems...
, a linear filter often used in audio crossover systems - Bessel (crater)Bessel (crater)Bessel is a small lunar crater that is located in the southern half of the Mare Serenitatis. Despite its small size, this is the largest crater to lie entirely within the mare. It lies to the north-northeast of the crater Menelaus....
, a small lunar crater - Bessel transform, also known as Fourier-Bessel transform or Hankel transformHankel transformIn mathematics, the Hankel transform expresses any given function f as the weighted sum of an infinite number of Bessel functions of the first kind Jν. The Bessel functions in the sum are all of the same order ν, but differ in a scaling factor k along the r-axis...
- Bessel window
- Besselian date, see Epoch (astronomy)#Besselian years, a German merchant ship in service 1928-45, latterly for the Kriegsmarine
Bessel is the name of:
- Friedrich BesselFriedrich Bessel-References:* John Frederick William Herschel, A brief notice of the life, researches, and discoveries of Friedrich Wilhelm Bessel, London: Barclay, 1847 -External links:...
(1784–1846), German mathematician, astronomer, and systematizer of the Bessel functions - Bessel (born 1983), Dutch blogger and poet, also known as Bhaerts. Member of storytelling duo Bhaerts & Gaarder. Resident in AarhusAarhusAarhus or Århus is the second-largest city in Denmark. The principal port of Denmark, Aarhus is on the east side of the peninsula of Jutland in the geographical center of Denmark...
, Denmark. - Bessel KokBessel KokBessel Kok is a Dutch businessman and chess organiser living in Prague. He has served in top management positions in telecommunications companies in Belgium and in the Czech Republic...
(born 1941), Dutch businessman and chess organiser