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Per Bak

Per Bak (8 December 1948 – 16 October 2002) was a Danish theoretical physicist who coauthored the 1987 academic paper that coined the term "self-organized criticality."

Life and work edit

After receiving his Ph.D. from the Technical University of Denmark in 1974, Bak worked at Brookhaven National Laboratory. He specialized in phase transitions, such as those occurring when an insulator suddenly becomes a conductor or when water freezes. In that context, he also did important work on complicated spatially modulated (magnetic) structures in solids. This research led him to the more general question of how organization emerges from disorder.

In 1987, he and two postdoctoral researchers, Chao Tang and Kurt Wiesenfeld, published an article in Physical Review Letters setting a new concept they called self-organized criticality. The first discovered example of a dynamical system displaying such self-organized criticality, the Bak-Tang-Wiesenfeld sandpile model, was named after them.

Faced with many skeptics, Bak pursued the implications of his theory at a number of institutions, including the Brookhaven National Laboratory, the Santa Fe Institute, the Niels Bohr Institute in Copenhagen, and Imperial College London, where he became a professor in 2000.

In 1996, he took his ideas to a broader audience with his ambitiously titled book, How Nature Works. In 2001, Bak learned that he had myelodysplastic syndrome and died from complications of a stem-cell transplant.[1] Bak is survived by his second wife, Maya Paczuski, a fellow physicist and current professor at the University of Calgary,[2] with whom he has coauthored papers,[3][4] and his four children.

Selected publications edit

  • Bak, P (1 June 1982). "Commensurate phases, incommensurate phases and the devil's staircase". Reports on Progress in Physics. 45 (6): 587–629. CiteSeerX 10.1.1.131.4735. doi:10.1088/0034-4885/45/6/001.
  • Bak, Per; Tang, Chao; Wiesenfeld, Kurt (27 July 1987). "Self-organized criticality: an explanation of 1/f noise". Physical Review Letters. 59 (4): 381–384. Bibcode:1987PhRvL..59..381B. doi:10.1103/PhysRevLett.59.381. PMID 10035754.
  • 1996, How Nature Works: The Science of Self-Organized Criticality, New York: Copernicus. ISBN 0-387-94791-4
  • Bak, Per (December 1983). "Doing physics with microcomputers". Physics Today. 36 (12): 25–28. Bibcode:1983PhT....36l..25B. doi:10.1063/1.2915383.

References edit

  1. ^ Johnson, George (2002-10-29). . The New York Times. ISSN 0362-4331. Archived from the original on 25 Jan 2004. Retrieved 2024-04-11.
  2. ^ "Home | Complexity". University of Calgary. Retrieved 1 January 2021.
  3. ^ Bak, P.; Paczuski, M. (18 July 1995). "Complexity, contingency, and criticality". Proceedings of the National Academy of Sciences. 92 (15): 6689–6696. Bibcode:1995PNAS...92.6689B. doi:10.1073/pnas.92.15.6689. PMC 41396. PMID 11607561.
  4. ^ Maslov, Sergei; Paczuski, Maya; Bak, Per (17 October 1994). "Avalanches and $\frac{1}{f}$ Noise in Evolution and Growth Models". Physical Review Letters. 73 (16): 2162–2165. doi:10.1103/PhysRevLett.73.2162. PMID 10056988.

References edit

  • Jensen, Mogens Høgh (November 2002). "Per Bak (1947–2002)". Nature. 420 (6913): 284. doi:10.1038/420284a. PMID 12447430. S2CID 20688217.

december, 1948, october, 2002, danish, theoretical, physicist, coauthored, 1987, academic, paper, that, coined, term, self, organized, criticality, born, 1948, december, 1948brønderslev, denmarkdied16, october, 2002, 2002, aged, copenhagen, denmarknationalityd. Per Bak 8 December 1948 16 October 2002 was a Danish theoretical physicist who coauthored the 1987 academic paper that coined the term self organized criticality Per BakBorn 1948 12 08 8 December 1948Bronderslev DenmarkDied16 October 2002 2002 10 16 aged 53 Copenhagen DenmarkNationalityDanishAlma materTechnical University of DenmarkRiso National LaboratoryKnown forSelf organized criticalityBak Sneppen modelBak Tang Wiesenfeld sandpileScientific careerFieldsPhysicistInstitutionsBrookhaven National LaboratoryUniversity of CopenhagenSanta Fe Institute Niels Bohr Institute Imperial College London Contents 1 Life and work 2 Selected publications 3 References 4 ReferencesLife and work editAfter receiving his Ph D from the Technical University of Denmark in 1974 Bak worked at Brookhaven National Laboratory He specialized in phase transitions such as those occurring when an insulator suddenly becomes a conductor or when water freezes In that context he also did important work on complicated spatially modulated magnetic structures in solids This research led him to the more general question of how organization emerges from disorder In 1987 he and two postdoctoral researchers Chao Tang and Kurt Wiesenfeld published an article in Physical Review Letters setting a new concept they called self organized criticality The first discovered example of a dynamical system displaying such self organized criticality the Bak Tang Wiesenfeld sandpile model was named after them Faced with many skeptics Bak pursued the implications of his theory at a number of institutions including the Brookhaven National Laboratory the Santa Fe Institute the Niels Bohr Institute in Copenhagen and Imperial College London where he became a professor in 2000 In 1996 he took his ideas to a broader audience with his ambitiously titled book How Nature Works In 2001 Bak learned that he had myelodysplastic syndrome and died from complications of a stem cell transplant 1 Bak is survived by his second wife Maya Paczuski a fellow physicist and current professor at the University of Calgary 2 with whom he has coauthored papers 3 4 and his four children Selected publications editBak P 1 June 1982 Commensurate phases incommensurate phases and the devil s staircase Reports on Progress in Physics 45 6 587 629 CiteSeerX 10 1 1 131 4735 doi 10 1088 0034 4885 45 6 001 Bak Per Tang Chao Wiesenfeld Kurt 27 July 1987 Self organized criticality an explanation of 1 f noise Physical Review Letters 59 4 381 384 Bibcode 1987PhRvL 59 381B doi 10 1103 PhysRevLett 59 381 PMID 10035754 1996 How Nature Works The Science of Self Organized Criticality New York Copernicus ISBN 0 387 94791 4 Bak Per December 1983 Doing physics with microcomputers Physics Today 36 12 25 28 Bibcode 1983PhT 36l 25B doi 10 1063 1 2915383 References edit Johnson George 2002 10 29 Per Bak 54 Physicist of Sudden Change Dies The New York Times ISSN 0362 4331 Archived from the original on 25 Jan 2004 Retrieved 2024 04 11 Home Complexity University of Calgary Retrieved 1 January 2021 Bak P Paczuski M 18 July 1995 Complexity contingency and criticality Proceedings of the National Academy of Sciences 92 15 6689 6696 Bibcode 1995PNAS 92 6689B doi 10 1073 pnas 92 15 6689 PMC 41396 PMID 11607561 Maslov Sergei Paczuski Maya Bak Per 17 October 1994 Avalanches and frac 1 f Noise in Evolution and Growth Models Physical Review Letters 73 16 2162 2165 doi 10 1103 PhysRevLett 73 2162 PMID 10056988 References editJensen Mogens Hogh November 2002 Per Bak 1947 2002 Nature 420 6913 284 doi 10 1038 420284a PMID 12447430 S2CID 20688217 Retrieved from https en wikipedia org w index php title Per Bak amp oldid 1218314411, wikipedia, wiki, book, books, library,

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