Oliver Heaviside

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Oliver Heaviside
Oheaviside.jpg
Born(1850-05-18)18 May 1850
Died3 February 1925(1925-02-03) (aged 74)
Torquay, Devon, England
NationalityBritish
Known for Heaviside cover-up method
Kennelly–Heaviside layer
Reactance
Heaviside step function
Differential operators
Vector analysis
Heaviside condition
Coaxial cable
Awards Faraday Medal (1922)
Fellow of the Royal Society [1]
Scientific career
Fields Electrical engineering, mathematics and physics
InstitutionsGreat Northern Telegraph Company

Oliver Heaviside FRS [1] ( /ˈhɛvisd/ ; 18 May 1850 – 3 February 1925) was an English self-taught electrical engineer, mathematician, and physicist who adapted complex numbers to the study of electrical circuits, invented mathematical techniques for the solution of differential equations (equivalent to Laplace transforms), reformulated Maxwell's field equations in terms of electric and magnetic forces and energy flux, and independently co-formulated vector analysis. Although at odds with the scientific establishment for most of his life, Heaviside changed the face of telecommunications, mathematics, and science. [2]

Fellow of the Royal Society Elected Fellow of the Royal Society, including Honorary, Foreign and Royal Fellows

Fellowship of the Royal Society is an award granted to individuals that the Royal Society of London judges to have made a 'substantial contribution to the improvement of natural knowledge, including mathematics, engineering science, and medical science'.

Electrical engineering Field of engineering that deals with electricity

Electrical engineering is a technical discipline concerned with the study, design and application of equipment, devices and systems which use electricity, electronics, and electromagnetism. It emerged as an identified activity in the latter half of the 19th century after commercialization of the electric telegraph, the telephone, and electrical power generation, distribution and use.

Mathematician person with an extensive knowledge of mathematics

A mathematician is someone who uses an extensive knowledge of mathematics in his or her work, typically to solve mathematical problems.

Contents

Biography

Early life

Heaviside was born in Camden Town, London, at 55 Kings Street [3] :13 (now Plender Street). He was a short and red-headed child, and suffered from scarlet fever when young, which left him with a hearing impairment. A small legacy enabled the family to move to a better part of Camden when he was thirteen and he was sent to Camden House Grammar School. He was a good student, placed fifth out of five hundred students in 1865, but his parents could not keep him at school after he was 16, so he continued studying for a year by himself and had no further formal education. [4] :51

Camden Town Inner city district of London

Camden Town, often shortened to Camden, is a district of northwest London, England, 2.5 miles (4.1 km) north of Charing Cross. It is the administrative centre of the London Borough of Camden, and identified in the London Plan as one of 34 major centres in Greater London.

Scarlet fever infectious disease

Scarlet fever is a disease which can occur as a result of a group A streptococcus infection, also known as Streptococcus pyogenes. The signs and symptoms include a sore throat, fever, headaches, swollen lymph nodes, and a characteristic rash. The rash is red and feels like sandpaper and the tongue may be red and bumpy. It most commonly affects children between five and 15 years of age.

Heaviside's uncle by marriage was Sir Charles Wheatstone (1802–1875), an internationally celebrated expert in telegraphy and electromagnetism, and the original co-inventor of the first commercially successful telegraph in the mid-1830s. Wheatstone took a strong interest in his nephew's education [5] and in 1867 sent him north to work with his own, older brother Arthur, who was managing one of Wheatstone's telegraph companies in Newcastle-upon-Tyne. [4] :53

Charles Wheatstone British scientist and inventor

Sir Charles Wheatstone FRS HFRSE DCL LLD, was an English scientist and inventor of many scientific breakthroughs of the Victorian era, including the English concertina, the stereoscope, and the Playfair cipher. However, Wheatstone is best known for his contributions in the development of the Wheatstone bridge, originally invented by Samuel Hunter Christie, which is used to measure an unknown electrical resistance, and as a major figure in the development of telegraphy.

Two years later he took a job as a telegraph operator with the Danish Great Northern Telegraph Company laying a cable from Newcastle to Denmark using British contractors. He soon became an electrician. Heaviside continued to study while working, and by the age of 22 he published an article in the prestigious Philosophical Magazine on 'The Best Arrangement of Wheatstone's Bridge for measuring a Given Resistance with a Given Galvanometer and Battery' [6] which received positive comments from physicists who had unsuccessfully tried to solve this algebraic problem, including Sir William Thomson, to whom he gave a copy of the paper, and James Clerk Maxwell. When he published an article on the duplex method of using a telegraph cable, [7] he poked fun at R. S. Culley, the engineer in chief of the Post Office telegraph system, who had been dismissing duplex as impractical. Later in 1873 his application to join the Society of Telegraph Engineers was turned down with the comment that "they didn't want telegraph clerks". This riled Heaviside, who asked Thomson to sponsor him, and along with support of the society's president he was admitted "despite the P.O. snobs". [4] :60

Denmark Constitutional monarchy in Europe

Denmark, officially the Kingdom of Denmark, is a Nordic country. Denmark proper, which is the southernmost of the Scandinavian countries, consists of a peninsula, Jutland, and an archipelago of 443 named islands, with the largest being Zealand, Funen and the North Jutlandic Island. The islands are characterised by flat, arable land and sandy coasts, low elevation and a temperate climate. The southernmost of the Scandinavian nations, Denmark lies southwest of Sweden and south of Norway, and is bordered to the south by Germany. The Kingdom of Denmark also includes two autonomous territories in the North Atlantic Ocean: the Faroe Islands and Greenland. Denmark has a total area of 42,924 km2 (16,573 sq mi), land area of 42,394 km2 (16,368 sq mi), and the total area including Greenland and the Faroe Islands is 2,210,579 km2 (853,509 sq mi), and a population of 5.8 million.

<i>Philosophical Magazine</i> scientific journal established in 1798

The Philosophical Magazine is one of the oldest scientific journals published in English. It was established by Alexander Tilloch in 1798; in 1822 Richard Taylor became joint editor and it has been published continuously by Taylor & Francis ever since.

James Clerk Maxwell Scottish physicist

James Clerk Maxwell was a Scottish scientist in the field of mathematical physics. His most notable achievement was to formulate the classical theory of electromagnetic radiation, bringing together for the first time electricity, magnetism, and light as different manifestations of the same phenomenon. Maxwell's equations for electromagnetism have been called the "second great unification in physics" after the first one realised by Isaac Newton.

In 1873 Heaviside had encountered Maxwell's newly published, and later famous, two-volume Treatise on Electricity and Magnetism . In his old age Heaviside recalled:

I remember my first look at the great treatise of Maxwell's when I was a young man… I saw that it was great, greater and greatest, with prodigious possibilities in its power… I was determined to master the book and set to work. I was very ignorant. I had no knowledge of mathematical analysis (having learned only school algebra and trigonometry which I had largely forgotten) and thus my work was laid out for me. It took me several years before I could understand as much as I possibly could. Then I set Maxwell aside and followed my own course. And I progressed much more quickly… It will be understood that I preach the gospel according to my interpretation of Maxwell. [8]

Undertaking research from home, he helped develop transmission line theory (also known as the " telegrapher's equations "). Heaviside showed mathematically that uniformly distributed inductance in a telegraph line would diminish both attenuation and distortion, and that, if the inductance were great enough and the insulation resistance not too high, the circuit would be distortionless in that currents of all frequencies would have equal speeds of propagation. [9] Heaviside's equations helped further the implementation of the telegraph.

Middle years

From 1882 to 1902, except for three years, he contributed regular articles to the trade paper The Electrician , which wished to improve its standing, for which he was paid £40 per year. This was hardly enough to live on, but his demands were very small and he was doing what he most wanted to. Between 1883 and 1887 these averaged 2–3 articles per month and these articles later formed the bulk of his Electromagnetic Theory and Electrical Papers. [4] :71

In 1880, Heaviside researched the skin effect in telegraph transmission lines. That same year he patented, in England, the coaxial cable. In 1884 he recast Maxwell's mathematical analysis from its original cumbersome form (they had already been recast as quaternions) to its modern vector terminology, thereby reducing twelve of the original twenty equations in twenty unknowns down to the four differential equations in two unknowns we now know as Maxwell's equations. The four re-formulated Maxwell's equations describe the nature of electric charges (both static and moving), magnetic fields, and the relationship between the two, namely electromagnetic fields.

Between 1880 and 1887, Heaviside developed the operational calculus using p for the differential operator, (which Boole [10] had previously denoted by D), giving a method of solving differential equations by direct solution as algebraic equations. This later caused a great deal of controversy, owing to its lack of rigour. He famously said, "Mathematics is an experimental science, and definitions do not come first, but later on. They make themselves, when the nature of the subject has developed itself." [11] On another occasion he asked somewhat more defensively, "Shall I refuse my dinner because I do not fully understand the process of digestion?" [12]

In 1887, Heaviside worked with his brother Arthur on a paper entitled "The Bridge System of Telephony". However the paper was blocked by Arthur's superior, William Henry Preece of the Post Office, because part of the proposal was that loading coils (inductors) should be added to telephone and telegraph lines to increase their self-induction and correct the distortion which they suffered. Preece had recently declared self-inductance to be the great enemy of clear transmission. Heaviside was also convinced that Preece was behind the sacking of the editor of The Electrician which brought his long-running series of articles to a halt (until 1891). [13] There was a long history of animosity between Preece and Heaviside. Heaviside considered Preece to be mathematically incompetent, an assessment supported by the biographer Paul J. Nahin: "Preece was a powerful government official, enormously ambitious, and in some remarkable ways, an utter blockhead." Preece's motivations in suppressing Heaviside's work were more to do with protecting Preece's own reputation and avoiding having to admit error than any perceived faults in Heaviside's work. [3] : xi–xvii, 162–183

The importance of Heaviside's work remained undiscovered for some time after publication in The Electrician, and so its rights lay in the public domain. In 1897, AT&T employed one of its own scientists, George A. Campbell, and an external investigator Michael I. Pupin to find some respect in which Heaviside's work was incomplete or incorrect. Campbell and Pupin extended Heaviside's work, and AT&T filed for patents covering not only their research, but also the technical method of constructing the coils previously invented by Heaviside. AT&T later offered Heaviside money in exchange for his rights; it is possible that the Bell engineers' respect for Heaviside influenced this offer. However, Heaviside refused the offer, declining to accept any money unless the company were to give him full recognition. Heaviside was chronically poor, making his refusal of the offer even more striking. [14]

But this setback had the effect of turning Heaviside's attention towards electromagnetic radiation, [15] and in two papers of 1888 and 1889, he calculated the deformations of electric and magnetic fields surrounding a moving charge, as well as the effects of it entering a denser medium. This included a prediction of what is now known as Cherenkov radiation, and inspired his friend George FitzGerald to suggest what now is known as the Lorentz–FitzGerald contraction.

In 1889, Heaviside first published a correct derivation of the magnetic force on a moving charged particle, [16] which is now called the Lorentz force.

In the late 1880s and early 1890s, Heaviside worked on the concept of electromagnetic mass. Heaviside treated this as material mass, capable of producing the same effects. Wilhelm Wien later verified Heaviside's expression (for low velocities).

In 1891 the British Royal Society recognized Heaviside's contributions to the mathematical description of electromagnetic phenomena by naming him a Fellow of the Royal Society, and the following year devoting more than fifty pages of the Philosophical Transactions of the Society to his vector methods and electromagnetic theory. In 1905 Heaviside was given an honorary doctorate by the University of Göttingen.

Later years and views

In 1896, FitzGerald and John Perry obtained a civil list pension of £120 per year for Heaviside, who was now living in Devon, and persuaded him to accept it, after he had rejected other charitable offers from the Royal Society. [15]

In 1902, Heaviside proposed the existence of what is now known as the Kennelly–Heaviside layer of the ionosphere. Heaviside's proposal included means by which radio signals are transmitted around the Earth's curvature. The existence of the ionosphere was confirmed in 1923. The predictions by Heaviside, combined with Planck's radiation theory, probably discouraged further attempts to detect radio waves from the Sun and other astronomical objects. For whatever reason, there seem to have been no attempts for 30 years, until Jansky's development of radio astronomy in 1932.

In later years his behavior became quite eccentric. According to associate B. A. Behrend, he became a recluse who was so averse to meeting people that he delivered the manuscripts of his Electrician papers to a grocery store, where the editors picked them up. [17] Though he had been an active cyclist in his youth, his health seriously declined in his sixth decade. During this time Heaviside would sign letters with the initials "W.O.R.M." after his name. Heaviside also reportedly started painting his fingernails pink and had granite blocks moved into his house for furniture. [3] : xx In 1922, he became the first recipient of the Faraday Medal, which was established that year.

On Heaviside's religious views, he was a Unitarian, but not a religious one. He was even said to have made fun of people who put their faith in a supreme being. [18]

Comparison of before and after the restoration project. Comparison of before and after the monument restoration.PNG
Comparison of before and after the restoration project.

Heaviside died on 3 February 1925, at Torquay in Devon after falling from a ladder, [19] and is buried near the eastern corner of Paignton cemetery. He is buried with his father, Thomas Heaviside (1813–1896) and his mother, Rachel Elizabeth Heaviside. The gravestone was cleaned thanks to an anonymous donor sometime in 2005. [20] Most of his recognition was gained posthumously.

Heaviside Memorial Project

In July 2014, academics at Newcastle University, UK and the Newcastle Electromagnetics Interest Group founded the Heaviside Memorial Project [21] in a bid to fully restore the monument through public subscription. [22] [23] The restored memorial was ceremonially unveiled on 30 August 2014 by Alan Heather, a distant relative of Heaviside. The unveiling was attended by the Mayor of Torbay, the MP for Torbay, an ex-curator of the Science Museum (representing the Institution of Engineering and Technology), the Chairman of the Torbay Civic Society, and delegates from Newcastle University. [24]

The Heaviside Collection 1872–1923

A collection of Heaviside's notebooks, papers, correspondence, notes and annotated pamphlets on telegraphy is held at the Institution of Engineering and Technology (IET) Archive Centre. [25]

Innovations and discoveries

Heaviside did much to develop and advocate vector methods and vector calculus. [26] Maxwell's formulation of electromagnetism consisted of 20 equations in 20 variables. Heaviside employed the curl and divergence operators of the vector calculus to reformulate 12 of these 20 equations into four equations in four variables (B, E, J, and ρ), the form by which they have been known ever since (see Maxwell's equations). Less well known is that Heaviside's equations and Maxwell's are not exactly the same, and in fact it is easier to modify the former to make them compatible with quantum physics. [27] The possibility of gravitational waves was also discussed by Heaviside using the analogy between the inverse-square law in gravitation and electricity. [28]

He invented the Heaviside step function, using it to calculate the current when an electric circuit is switched on. He was the first to use the unit impulse function now usually known as the Dirac delta function. [29] He invented his operational calculus method for solving linear differential equations. This resembles the currently used Laplace transform method based on the "Bromwich integral" named after Bromwich who devised a rigorous mathematical justification for Heaviside's operator method using contour integration. [30] Heaviside was familiar with the Laplace transform method but considered his own method more direct. [31] [32]

Heaviside developed the transmission line theory (also known as the "telegrapher's equations"), which had the effect of increasing the transmission rate over transatlantic cables by a factor of ten. It originally took ten minutes to transmit each character, and this immediately improved to one character per minute. Closely related to this was his discovery that telephone transmission could be greatly improved by placing electrical inductance in series with the cable. [33] Heaviside also independently discovered the Poynting vector. [3] :116–118

Heaviside advanced the idea that the Earth's uppermost atmosphere contained an ionized layer known as the ionosphere; in this regard, he predicted the existence of what later was dubbed the Kennelly–Heaviside layer. In 1947 Edward Victor Appleton received the Nobel Prize in Physics for proving that this layer really existed.

Electromagnetic terms

Heaviside coined the following terms of art in electromagnetic theory:

Publications

See also

Related Research Articles

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References

  1. 1 2 Anon (1926). "Obituary Notices of Fellows Deceased: Rudolph Messel, Frederick Thomas Trouton, John Venn, John Young Buchanan, Oliver Heaviside, Andrew Gray". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. 110 (756): i–v. Bibcode:1926RSPSA.110D...1.. doi:10.1098/rspa.1926.0036.
  2. Hunt, B. J. (2012). "Oliver Heaviside: A first-rate oddity". Physics Today. 65 (11): 48–54. Bibcode:2012PhT....65k..48H. doi:10.1063/PT.3.1788.
  3. 1 2 3 4 Nahin, Paul J. (9 October 2002). Oliver Heaviside: The Life, Work, and Times of an Electrical Genius of the Victorian Age. JHU Press. ISBN   978-0-8018-6909-9.
  4. 1 2 3 4 Bruce J. Hunt (1991) The Maxwellians, Cornell University Press ISBN   978-0-8014-8234-2
  5. Sarkar, T. K.; Mailloux, Robert; Oliner, Arthur A.; Salazar-Palma, M.; Sengupta, Dipak L. (2006). History of Wireless. John Wiley & Sons. p. 230. ISBN   978-0-471-78301-5.
  6. Heaviside 1892, pp. 3-8.
  7. Heaviside 1892, pp. 18-34.
  8. Sarkar, T. K.; Mailloux, Robert; Oliner, Arthur A.; Salazar-Palma, M.; Sengupta, Dipak L. (30 January 2006). History of Wireless. John Wiley & Sons. p. 232. ISBN   978-0-471-78301-5.
  9. Wikisource-logo.svg One or more of the preceding sentences incorporates text from a publication now in the public domain : Kempe, Harry Robert (1911). "Telephone". In Chisholm, Hugh (ed.). Encyclopædia Britannica . 26 (11th ed.). Cambridge University Press. p. 554.
  10. "A Treatise on Differential Equations", 1859
  11. "VIII. On operations in physical mathematics. Part II". Proceedings of the Royal Society of London. 54 (326–330): 105–143. 1894. doi:10.1098/rspl.1893.0059.
  12. Heaviside, "Mathematics and the Age of the Earth" in Electromagnetic Theory vol. 2
  13. Hunt, Bruce J. (2004). "Heaviside, Oliver" . Oxford Dictionary of National Biography.
  14. Wiener, Norbert (1993). Invention: The Care and Feeding of Ideas. Cambridge, Massachusetts: MIT Press. pp. 70–75. ISBN   0-262-73111-8.
  15. 1 2 Hunt 2004.
  16. Heaviside, O. (1889). "XXXIX.On the electromagnetic effects due to the motion of electrification through a dielectric". Philosophical Magazine. Series 5. 27 (167): 324–339. doi:10.1080/14786448908628362.
  17. "Pages with the Editor" (PDF). Popular Radio. New York: Popular Radio, Inc. 7 (6): 6. June 1925. Retrieved 14 August 2014.
  18. Pickover, Clifford A. (1998). "Oliver Heaviside". Strange Brains and Genius: The Secret Lives of Eccentric Scientists and Madmen. Plenum Publishing Company Limited. ISBN   9780306457845. Religion: A Unitarian, but not religious. Poked fun at those who put their faith in a Supreme Being.
  19. "Oliver Heaviside". Journal of the AIEE. 44 (3): 316–317. March 1925. doi:10.1109/JAIEE.1925.6537168.
  20. Mahon, Basil (2009). Oliver Heaviside: Maverick mastermind of electricity. The Institution of Engineering and Technology. ISBN   9780863419652.
  21. "Heaviside Memorial Project Homepage". Nature. Heaviside Memorial Project. 165 (4208): 991–3. 27 July 2014. Archived from the original on 18 July 2014. Retrieved 31 July 2014.
  22. "Bid to restore Paignton monument to Oliver Heaviside". www.torquayheraldexpress.co.uk. Herald Express. 27 July 2014. Archived from the original on 6 August 2014. Retrieved 29 July 2014.
  23. "The Heaviside Memorial Project". www.newcastle.ac.uk. Newcastle University. 29 July 2014. Archived from the original on 29 July 2014. Retrieved 29 July 2014.
  24. "Restored Heaviside memorial unveiled on Saturday". www.torquayheraldexpress.co.uk. Herald Express. 1 September 2014. Archived from the original on 3 September 2014. Retrieved 1 September 2014.
  25. Savoy Hill House 7-10, Savoy Hill, London WC2R 0BU Email: archives@theiet.org
  26. See especially Electromagnetic Theory, vol.1 chap.3 pp.132-305 where he gave a complete account
  27. Topological Foundations of Electromagnetism, World Scientific Series in Contemporary Chemical Physics, 13 March 2008, Terence W. Barrett.
  28. A gravitational and electromagnetic analogy,Electromagnetic Theory, 1893, 455-466 Appendix B. This was 25 years before Einstein's paper on this subject
  29. Electromagnetic Theory,vol.II, para.271, eqns 54,55
  30. See the paper of Jeffreys quoted in the Bromwich WP article
  31. Electromagnetic Theory vol 3, section starting on p.324. Available online
  32. A rigorous version of Heaviside's operational calculus has been constructed see Mikusinski J: The Operational Calculus, Pergamon Press 1959
  33. Wiener, Norbert (1993). Invention: The Care and 70–75. Cambridge, Massachusetts: MIT Press. ISBN   0-262-73111-8.

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