David Snoke

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David W. Snoke
Residence Pittsburgh, Pennsylvania
Fields Physics
Institutions University of Pittsburgh in Pennsylvania
American Physical Society

David W. Snoke is a physics professor at the University of Pittsburgh in the Department of Physics and Astronomy. In 2006 he was elected a Fellow of the American Physical Society "[f]or his pioneering work on the experimental and theoretical understanding of dynamical optical processes in semiconductor systems."[1] In 2004 he co-wrote a controversial paper with prominent intelligent design proponent Michael Behe.

Academic career[edit]

Snoke received his PhD in physics from the University of Illinois at Urbana-Champaign. He has worked for The Aerospace Corporation and was a visiting scientist and Fellow at the Max Planck Institute.[2]

His research has focused on basic processes and phase transitions of electrons, holes, including nonequilibrium dynamics of electron plasma [3][4] and excitons,[5] the Mott transition from exciton gas to electron-hole plasma[6][7] and Bose–Einstein condensation of excitons and polaritons.[8][9] His research group at the University of Pittsburgh uses stress to trap excitons in confined regions,[10] similar to the way atoms are confined in traps for Bose–Einstein condensation experiments.

Behe and Snoke (2004)[edit]

In 2004, Snoke co-authored an article with Michael Behe, a senior fellow of the Discovery Institute's Center for Science and Culture, in the scientific journal Protein Science,[11] which received widespread criticism. Behe has stated that the results of the paper support his notion of irreducible complexity, based on the calculation of the probability of mutations required for evolution to succeed. However, the published version did not address the concept directly; according to Behe, all references to irreducible complexity were eliminated prior to the paper's publication at the behest of the reviewers.[12] Michael Lynch authored a response,[13] to which Behe and Snoke responded.[14] Protein Science discussed the papers in an editorial.[15] Protein Science received letters that "contained many points of disagreement with the Behe and Snoke article", including the points that:[15]

  • Substantial variation in the rate of mutation fixation occurs, both between lineages and between sites on a protein during evolution. This is a central concept of modern population genetics [citations removed]
  • Changes in one site are known to cause changes in the mutation and acceptance rate at other sites in a protein, generally called "compensatory" changes [citations removed]
  • Recombination strongly accelerates the rate of joining of independent mutations at multiple sites and of grafting new domains with additional functions and sites of interaction to proteins to create new modes of action or regulation [citations removed]
  • Selection acts continuously, and cumulative effects, rather than a single strongly adaptive change, are the basis of evolution under a Darwinian model. Thus, intermediate states must also be assumed to be selected.

The paper's assumptions have been severely criticised and the conclusions it draws from its mathematical model have been both criticised and contradicted:

  • An essay criticised the paper for an "over-simplified the process, resulting in questionable conclusions", that "[t]heir assumptions bias their results towards more pessimistic numbers", including one assumption that is "probably false under all circumstances", another that is "probably false as a general rule" and assuming "much too high" a level of substitutions that would destroy the protein's function. It concludes "[a]nd ironically, despite these faulty assumptions, Behe and Snoke show that the probability of small multi-residue features evolving is extremely high, given the types of organisms that Behe and Snoke's model applies to."[16]
  • More recent research suggests that Behe and Snoke's model, and even Lynch's response, may have been "substantial underestimates" "of the rate of obtaining an adaptive combination of mutations".[17]
  • Biochemical analysis of the question has supported an orthodox evolutionary view and rejected Behe and Snoke's approach as an "unreasonable model which assume[s] 'leaps in thin air', such as the evolution of completely novel activities via multiple and simultaneous amino acid changes".[18]

On May 7, 2005, Behe described the paper in presenting arguments for irreducible complexity in his testimony at the Kansas evolution hearings.[19] At the Kitzmiller v. Dover Area School District trial later that year it was the one article referenced by both Behe and Scott Minnich as supporting intelligent design. In his ruling, Judge Jones noted that "A review of the article indicates that it does not mention either irreducible complexity or ID. In fact, Professor Behe admitted that the study which forms the basis for the article did not rule out many known evolutionary mechanisms and that the research actually might support evolutionary pathways if a biologically realistic population size were used."[20]

A Biblical Case for an Old Earth (2006)[edit]

His book, A Biblical Case for an Old Earth (Baker Books, 2006) was described in a review by Law Professor David W. Opderbeck, in the American Scientific Affiliation's Perspectives on Science and Christian Faith as "succeed[ing] admirably" in "establish[ing] that the 'day-age' view is a valid alternative for Christians who hold to biblical inerrancy", but as "less persuasive" at "argu[ing] for a concordist understanding of the Genesis texts and modern science."[21] Snoke was elected a Fellow of the American Scientific Affiliation in 2006.[2]

Bibliography[edit]

  • Natural Philosophy: Physics and Western Thought, distributed by Access Research Network (2003).

References[edit]

  1. ^ Archive (1995-present), American Physical Society
  2. ^ a b ASA newsletters, November/December 2006. 
  3. ^ D.W. Snoke, W.W. Ruehle, Y.-C. Lu and E. Bauser (1992). "Nonthermal Distribution of Electrons on Picosecond Timescale in GaAs". Physical Review Letters 68 (7): 990–993. Bibcode:1992PhRvL..68..990S. doi:10.1103/PhysRevLett.68.990. PMID 10046050. 
  4. ^ D.W. Snoke (1992). "Density dependence of electron scattering at low density". Physical Review B 50 (16): 11583–11591. Bibcode:1994PhRvB..5011583S. doi:10.1103/PhysRevB.50.11583. 
  5. ^ D.W. Snoke, D. Braun, and M. Cardona (1991). "Carrier thermalization in Cu2O: Phonon emission by excitons". Physical Review B 44 (7): 2991. Bibcode:1991PhRvB..44.2991S. doi:10.1103/PhysRevB.44.2991. 
  6. ^ D.W. Snoke and J.D. Crawford (1995). "Hysteresis in the Mott transition between plasma and insulating gas". Physical Review E 52 (6): 5796. arXiv:cond-mat/9507116. Bibcode:1995PhRvE..52.5796S. doi:10.1103/PhysRevE.52.5796. 
  7. ^ D.W. Snoke (2008). "Hysteresis in the Mott transition between plasma and insulating gas". Solid State Communications 146: 73. arXiv:0709.1415. Bibcode:2008SSCom.146...73S. doi:10.1016/j.ssc.2008.01.012. 
  8. ^ Z. Voros, D. Snoke, L. Pfeiffer, and K. West (2006). "Trapping Excitons in a Two-Dimensional In-Plane Harmonic Potential: Experimental Evidence for Equilibration of Indirect Excitons". Physical Review Letters 97 (1): 016803. Bibcode:2006PhRvL..97a6803V. doi:10.1103/PhysRevLett.97.016803. PMID 16907396. 
  9. ^ R. Balili, V. Hartwell, D.W. Snoke, L. Pfeiffer and K. West (2007). "Bose-Einstein Condensation of Microcavity Polaritons in a Trap". Science 316 (5827): 1007–10. Bibcode:2007Sci...316.1007B. doi:10.1126/science.1140990. PMID 17510360. 
  10. ^ V. Negoita, D.W. Snoke, and K. Eberl (1999). "Stretching Quantum Wells: a Method for Trapping Free Carriers in GaAs Heterostructures". Applied Physics Letters 75 (14): 2059. Bibcode:1999ApPhL..75.2059N. doi:10.1063/1.124915. 
  11. ^ Michael Behe and David W. Snoke (2004). "Simulating evolution by gene duplication of protein features that require multiple amino acid residues". Protein Science 13 (10): 2651–2664. doi:10.1110/ps.04802904. PMC 2286568. PMID 15340163. 
  12. ^ Michael J. Behe, Day 10, morning testimony, in Kitzmiller v. Dover Area School District, trial transcript page 46 [1]
  13. ^ Michael Lynch (2005). "Simple evolutionary pathways to complex proteins". Protein Science 14 (9): 2217–2225. doi:10.1110/ps.041171805. PMC 2253472. PMID 16131652. 
  14. ^ Michael Behe and David W. Snoke (2005). "A response to Michael Lynch". Protein Science 14 (9): 2226. doi:10.1110/ps.051674105. 
  15. ^ a b Mark Hermodson (2005). "Editorial and position papers". Protein Science 14 (9): 2215. doi:10.1110/ps.051654305. 
  16. ^ Theory is as Theory Does, Ian F. Musgrave, Steve Reuland, and Reed A. Cartwright, Talk Reason
  17. ^ Masel, Joanna (March 2006). "Cryptic Genetic Variation Is Enriched for Potential Adaptations". Genetics 172 (3): 1985–1991. doi:10.1534/genetics.105.051649. PMC 1456269. PMID 16387877. 
  18. ^ Afriat, Livnat; Cintia Roodveldt; Giuseppe Manco; Dan S. Tawfik (November 21, 2006). "The Latent Promiscuity of Newly Identified Microbial Lactonases Is Linked to a Recently Diverged Phosphotriesterase". Biochemistry 45 (46). doi:10.1021/bi061268r. 
  19. ^ "Kansas Evolution Hearings: Michael Behe and John Calvert". Retrieved 2008-03-10. 
  20. ^ Kitzmiller v. Dover Area School District, 400 F. Supp. 2d 707, 745 (M.D.Pa December 20, 2005). , docket # 04cv2688, Ruling, page 88
  21. ^ Opderbeck, David W. (2007). "Review of 'A Biblical Case for an Old Earth'". Perspectives on Science and Christian Faith. American Scientific Affiliation. 

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