UC Spark

Professor Phil Butler

Physics and Astronomy

Fields of Research

  • Algebraic and group theoretic methods for solving eigenvalue problems arising in quantum mechanics
  • Calculation of 3 jm and 6 j coefficients for various compact groups
  • Clifford algebras
  • Design of copper vapour and carbon dioxide lasers
  • Development of computer controlled scanning systems in a clinical environment
  • Feynman scattering
  • Improvements to the treatment of portwine stain lesions
  • Properties of electromagnetic solutions of the Dirac equation
  • Radiotherapy and imaging in medical physics
  • The structure of space-time

Researcher Summary

Applications and developments in physics and mathematics, ranging from the philosphical and mathematical foundations of quantum mechanics and electromagnetism, to the use of modern technologies in medical imaging.

Subject Area: Disciplines

Research Projects

Research Groups

Affiliations

Publications


  • Aamir, R., Walsh, M.F., Lansley, S.P., Doesburg, R.M., Zainon, R., de Ruiter, N.J.A., Butler, P.H. and Butler, A.P.H. (2012) Characterization of CdTe X-Ray Sensor Layer on Medipix Detector Chips. Materials Science Forum 700: 170-173. http://dx.doi.org/10.4028/www.scientific.net/MSF.700.170. (Journal Article)
  • Zainon, R., Ronaldson, J.P., Janmale, T., Scott, N.J., Buckenham, T.M., Butler, A.P.H., Butler, A.P.H., Doesburg, R.M., Gieseg, S.P., Roake, J.A. and Anderson, N.G. (2012) Spectral CT of carotid atherosclerotic plaque: comparison with histology. European Radiology 22(12): 2581-2588. http://dx.doi.org/10.1007/s00330-012-2538-7. (Journal Article)
  • Hurrell, M.A., Butler, A.P.H., Cook, N.J., Butler, P.H., Ronaldson, J.P. and Zainon, R. (2012) Spectral Hounsfield units: A new radiological concept. European Radiology 22(5): 1008-1013. http://dx.doi.org/10.1007/s00330-011-2348-3. (Journal Article)
  • Ronaldson, J.P., Zainon, R., Scott, N.J.A., Gieseg, S.P., Butler, A.P., Butler, P.H. and Anderson, N.G. (2012) Toward quantifying the composition of soft issues by spectral CT with Medipix3. Medical Physics 39(11): 6847-6857. http://dx.doi.org/10.1118/1.4760773. (Journal Article)
  • Ronaldson, J.P., Zainon, R., Scott, N.J.A., Gieseg, S.P., Butler, A.P., Butler, P.H. and Anderson, N.G. (2012) Toward quantifying the composition of soft tissues by spectral CT with Medipix3. Medical Physics 39(1): 6847-6857. http://dx.doi.org/10.1118/1.4760773. (Journal Article)
  • Ronaldson, J.P., Walsh, M., Nik, S.J., Donaldson, J., Doesburg, R.M.N., van Leeuwen, D., Ballabriga, R., Clyne, M.N., Butler, A.P.H. and Butler, P.H. (2011) Characterization of Medipix3 with the MARS readout and software. Journal of Instrumentation 6(1): C01056. http://dx.doi.org/10.1088/1748-0221/6/01/C01056. (Journal Article)
  • CMS Collaboration. (2011) Charged particle multiplicities in pp interactions at √s = 0.9, 2.36, and 7 TeV. Journal of High Energy Physics 2011(1): 79. http://dx.doi.org/10.1007/JHEP01(2011)079. (Journal Article)
  • Ball, A., Bell, A., Butler, A., Butler, P., Hall-Wilton, R., Hegeman, J., Lansley, S., Keen, G., Krofcheck, D., Mueller, S., Macpherson, A., Pfeiffer, D., Pospisil, S., Silverwood, H., Tsesmelis, E. and Vykydal, Z. (2011) Design, implementation and first measurements with the Medipix2-MXR detector at the Compact Muon Solenoid experiment. Journal of Instrumentation 6(1): P08005. http://dx.doi.org/10.1088/1748-0221/6/08/P08005. (Journal Article)
  • Walsh, M.F., Opie, A.M.T., Ronaldson, J.P., Doesburg, R.M.N., Nik, S.J., Mohr, J.L., Ballabriga, R., Butler, A.P.H. and Butler, P.H. (2011) First CT using Medipix3 and the MARS-CT-3 spectral scanner. Journal of Instrumentation 6(1): C01095. http://dx.doi.org/10.1088/1748-0221/6/01/C01095. (Journal Article)
  • CMS Collaboration. (2011) First measurement of the underlying event activity at the LHC with √s = 0.9 TeV. European Physical Journal C: Particles and Fields 70(3): 555-572. http://dx.doi.org/10.1140/epjc/s10052-010-1453-9. (Journal Article)
  • CMS Collaboration. (2011) Inclusive b-hadron production cross section with muons in pp collisions at √s=7TeV. Journal of High Energy Physics 2011(3): 6. http://dx.doi.org/10.1007/JHEP03(2011)090. (Journal Article)
  • CMS Collaboration. (2011) Measurement of BB angular correlations based on secondary vertex reconstruction at √s=7TeV. Journal of High Energy Physics 2011(3): 136. http://dx.doi.org/10.1007/JHEP03(2011)136. (Journal Article)
  • CMS Collaboration. (2011) Measurements of inclusive W and Z cross sections in pp collisions at √s=7 TeV. Journal of High Energy Physics 2011(1): 80. http://dx.doi.org/10.1007/JHEP01(2011)080. (Journal Article)
  • Aamir, R., Lansley, S.P., Zainon, R., Fiederle, M., Fauler, A., Greiffenberg, D., Butler, P.H. and Butler, A.P.H. (2011) Pixel sensitivity variation in a CdTe-Medipix2 detector using poly-energetic x-rays. Cambridge, UK: 12th International Workshop on Radiation Imaging Detectors (iWoRID 12), 11-15 Jul 2010. In Journal of Instrumentation 6 C01059. http://dx.doi.org/10.1088/1748-0221/6/01/C01059. (Conference Contribution - Paper in published proceedings)
  • CMS Collaboration. (2011) Search for a heavy gauge boson W' in the final state with an electron and large missing transverse energy in pp collisions at √s = 07 TeV. Physics Letters B: Nuclear Physics and Particle Physics 698(1): 21-39. http://dx.doi.org/10.1016/j.physletb.2011.02.048. (Journal Article)
  • CMS Collaboration. (2011) Search for heavy stable charged particles in pp collisions at √s=7TeV. Journal of High Energy Physics 2011(3): 24. http://dx.doi.org/10.1007/JHEP03(2011)024. (Journal Article)
  • CMS Collaboration. (2011) Search for microscopic black hole signatures at the Large Hadron Collider. Physics Letters B: Nuclear Physics and Particle Physics 697(5): 434-453. http://dx.doi.org/10.1016/j.physletb.2011.02.032. (Journal Article)
  • CMS Collaboration. (2011) Search for supersymmetry in pp collisions at 7 TeV in events with jets and missing transverse energy. Physics Letters B: Nuclear Physics and Particle Physics 698(3): 196-218. http://dx.doi.org/10.1016/j.physletb.2011.03.021. (Journal Article)
  • Bainbridge-Smith, A., Bones, P.J., Butler, A., Green, R., Gough, P.T., Hann, C.E., Hayes, M.P., Millane, R.P., Mukundan, R., Watts, R. and Weddell, S.J. (2010) Computational Image Processing at the University of Canterbury. Queenstown, New Zealand: 25th International Conference of Image and Vision Computing New Zealand, 8-9 Nov 2010. (Conference Contribution - Oral presentation)
  • Zainon, R., Butler, A.P.H., Cook, N.J., Butzer, J.S., Schleich, N., de Ruiter, N., Tlustos, L., Clark, M.J., Heinz, R. and Butler, P.H. (2010) Construction and Operation of the MARS-CT Scanner. Internetworking Indonesia Journal 2(1): 3-10. (Journal Article)
  • Lansley, S.P., Meyer, J., Butler, P.H., Fiederle, M., Williams, O.A. and Hall-Wilton, R.J. (2010) Diamond-on-Medipix x-ray detector. Cambridge, UK: 12th International Conference on Radiation Imaging Detectors (iWoRID 12), 11-15 Jul 2010. (Conference Contribution - Abstract)
  • CMS Collaboration. (2010) First Measurement of Bose-Einstein Correlations in Proton-Proton Collisions at sqrt(s)=0.9 and 2.36 TeV at the LHC. Physical Review Letters 105(3): 032001. http://dx.doi.org/10.1103/PhysRevLett.105.032001. (Journal Article)
  • Almalki, M., Majid, S.A., Butler, P.H. and Reinisch, L. (2010) Gadolinium concentration analysis in brain phantom by X-ray fluorescence. Australasian Physical & Engineering Science in Medicine 33(2): 185-191. http://dx.doi.org/10.1007/s13246-010-0020-x. (Journal Article)
  • Zainon, R., Cook, N., Butler, A.P., Gieseg, S.P., Anderson, N.G., Buckenham, T.M., Shelkov, G., Tlustos, L., Roake, J.A. and Butler, P. (2010) High resolution multi-energy CT imaging of atherosclerotic plaque. Christchurch, New Zealand: Health Research Society of Canterbury Seminar Series, 16 Jul 2010. In The New Zealand Medical Journal 123(1319) 97-98. (Conference Contribution - Abstract)
  • CMS Collaboration. (2010) Measurement of the charge ratio of atmospheric muons with the CMS detector. Physics Letters B: Nuclear Physics and Particle Physics 692(2): 83-104. http://dx.doi.org/10.1016/j.physletb.2010.07.033. (Journal Article)
  • CMS Collaboration. (2010) Observation of long-range, near-side angular correlations in proton-proton collisions at the LHC. Journal of High Energy Physics 9(91) http://dx.doi.org/10.1007/JHEP09(2010)091. (Journal Article)
  • CMS Collaboration. (2010) Performance of CMS hadron calorimeter timing and synchronization using test beam, cosmic ray, and LHC beam data. Journal of Instrumentation 5: T03013. http://dx.doi.org/10.1088/1748-0221/5/03/T03013. (Journal Article)
  • Scott, N.J., Butler, A.P., Butler, A.P., Berg, K.B., Carr, J.M., Butler, P.H., Cook, N.J., Clark, M.J. and Anderson, N.G. (2010) Pilot study to confirm that ovine fat and liver can be distinguished by spectroscopic tissue response on a Medipix-All-Resolution-System-CT (MARS-CT). Kyoto, Japan: 14th International Congress of Endocrinology (ICE2010), 26-30 Mar 2010. In Endocrinology Journal 57(Supplement 2) S421-S422. (Conference Contribution - Abstract)
  • Anderson, N.G., Butler, A.P., Scott, N.J.A., Cook, N.J., Butzer, J.S., Schleich, N., Firsching, M., Grasset, R., de Ruiter, N., Campbell, M. and Butler, P.H. (2010) Spectroscopic (multi-energy) CT distinguishes iodine and barium contrast material in MICE. European Radiology 20(9): 2126-2134. http://dx.doi.org/10.1007/s00330-010-1768-9. (Journal Article)
  • CMS Collaboration. (2010) Transverse-momentum and pseudorapidity distributions of charged hadrons in pp collisions at Ös = 0.9s=09 and 2.36 TeV. Journal of High Energy Physics 2010(2): 41. http://dx.doi.org/10.1007/JHEP02(2010)041. (Journal Article)
  • Zeller, H., Dufreneix, S., Clark, M.J., Butler, A.P.H., Butler, P.H., Cook, N.J. and Tlustos, L. (2009) Charge sharing between pixels in the spectral Medipix2 x-ray detector. Wellington, New Zealand: Image and Vision Computing New Zealand (IVCNZ 2009), 23-25 Nov 2009. http://dx.doi.org/10.1109/IVCNZ.2009.5378381. (Conference Contribution - Full conference paper)
  • Zainon, R., Butler, A.P.H., Cook, N.J., Butzer, J.S., Schleich, N., De Ruiter, N., Tlustos, L., Clark, M.J., Heinz, R. and Butler, P.H. (2009) Construction and Operation of the MARS-CT Scanner. Bandung, Indonesia: International Conference on Instrumentation, Control and Automation (ICA 2009), 20-22 Oct 2009. (Conference Contribution - Full conference paper)
  • Doesburg, R.M.N., Clyne, M.N., van Leeuwen, D.A., Cook, N.J., Butler, P.H. and Butler. A.P. (2009) Fast Ethernet Readout for Medipix Arrays with MARS-CT. Orlando, FL, USA: IEEE Nuclear Science Symposium Medical Imaging Conference, 25-31 Oct 2009. (Conference Contribution - Full conference paper)
  • Butler, A.P.H., Anderson, N.G., Hurrell, M.A., Cook, N.J., Scott, N.J. and Butler, P.H. (2009) Multiple contrast agent imaging using MARS-CT, a spectroscopic (multi-energy) photon counting microCT scanner. Chicago, IL, USA: 95th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA 2009), 29 Dec-4 Nov 2009. http://hdl.handle.net/10092/3128. (Conference Contribution - Full conference paper)
  • Bones, P., Wu, B., Vafadar, B., Butler, A. and Watts, R. (2009) On improved temporal resolution for magnetic resonance angiography. San Jose, CA, USA: Signal Recovery and Synthesis (SRS) Topical Meeting and Tabletop Exhibit, 13-14 Oct 2009. http://www.opticsinfobase.org/abstract.cfm?URI=SRS-2009-STuA3. (Conference Contribution - Abstract)
  • Berg, K.B., Carr, J.M., Clark, M.J., Cook, N.J., Anderson, N.G., Butler, A.P.M., Butler, P.H. and Butler , A.P.H. (2009) Pilot Study to Confirm that Fat and Liver can be Distinguished by Spectroscopic Tissue Response on a Medipix-All-Resolution System-CT (MARS-CT). Dunedin, New Zealand: 4th International Conference on Advanced Materials and Nanotechnology (AMN-4), 8-12 Feb 2009. (Conference Contribution - Full conference paper)
  • Butler, A.P.H., Cook, N.J., Schleich, N., Butzer, J.S., Bones, P.J., Anderson, N.G. and Butler, P.H. (2009) Processing of Spectral X-ray Data Using Principal Components Analysis. Prague, Czech Republic: 11th International Workshop on Radiation Imaging Detectors (iWoRiD 2009), 28 Jun-2 Jul 2009. (Conference Contribution - Full conference paper)
  • Butler, A.P.H. and Butler, P.H. (2009) The Christchurch MARS-CT Project. Auckland, New Zealand: NZBIO Conference 2009: Creating a Sustainable Bioeconomy in New Zealand, 9-11 Mar 2009. (Conference Contribution - Full conference paper)
  • Butler, A.P.H., Anderson, N.G., Tipples, R., Cook, N., Watts, R., Meyer, J., Bell, A.J., Melzer, T.R. and Butler, P.H. (2008) Bio-medical X-ray imaging with spectroscopic pixel detectors. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 591(1): 141-146. http://dx.doi.org/10.1016/j.nima.2008.03.039. (Journal Article)
  • Schleich, N., Butler, A.P.H., Cook, N.J., Butzer, J.S., van Leeuwen, D., Bones, P. and Butler, P.H. (2008) Calibration and operation of the 3D spectroscopic "MARS" scanner. Christchurch, New Zealand: Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference, 16-20 Nov 2008. (Conference Contribution - Oral presentation)
  • Butzer, J.S., Butler, A.P., Butler, P.H., Cook, N.J., Schleich, N., Firsching, M., Scott, N., Anderson, N., Bones, P.J., Ross, F., Watts, R., Meyer, J., van Leeuwen, D. and Selkirk, J. (2008) Contrast-agent imaging with "MARS". Christchurch, New Zealand: Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference (epsm abec 2008), 16-20 Nov 2008. (Conference Contribution - Oral presentation)
  • Reinisch, L. Butler. and P. (2008) Creation of a Medical Physics Training Programme in New Zealand. Jeddah, Saudi Arabia: International Symposium on the Peaceful Applications of Nuclear Technology in the GCC Countries, 3-5 Nov 2008. 5pp. http://www.kau.edu.sa/files/320/researches/47400_18861.pdf. (Conference Contribution - Full conference paper)
  • Selkirk, J., Schleich, N., Cook, N., Butzer, J., Butler, A. and Butler, P. (2008) Energy calibration of the Medipix-2 Quad MXR detector. Christchurch, New Zealand: Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference, 16-20 Nov 2008. (Conference Contribution - Oral presentation)
  • BABAR Collaboration. (2008) Exclusive Branching-Fraction Measurements of Semileptonic τ Decays into Three Charged Hadrons, into φπ-ντ, and into φK-ντ. Physical Review Letters 100(1): 011801. http://dx.doi.org/10.1103/PhysRevLett.100.011801. (Journal Article)
  • Graham, R.D., Hurst, R.B., Thirkettle, R.J., Rowe, C.H. and Butler, P.H. (2008) Experiment to detect frame dragging in a lead superconductor. Physica C: Superconductivity 468(5): 383-387. http://dx.doi.org/10.1016/j.physc.2007.11.011. (Journal Article)
  • Butler, A.P.H., Anderson, N., Cook, N. and Butler, P. (2008) Identifying Clinical applications of Spectroscopic x-ray imaging. Christchurch, New Zealand: Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference, 16-20 Nov 2008. (Conference Contribution - Oral presentation)
  • Butzer, J.S., Butler, A.P., Cook, N.J., Butler, P.H., Ross, F., Schleich, N., Selkirk, J., Watts, R., Meyer, J., Scott, N., Bones, P.J., van Leeuwen, D., Hemmingsen, S., Melzer, T.P. and Anderson, N. (2008) MARS: a 3D Spectroscopic X-Ray Imaging Device Based on Medipix. Dresden, Germany: IEEE Nuclear Science Symposium and Medical Imaging Conference, 19-25 Oct 2008. (Conference Contribution - Oral presentation)
  • Butzer, J.S., Butler, A.P.H., Butler, P.H., Cook, N.J., Schleich, N., Firsching, M., Scott, N., N. Anderson5, P.J., Ross F., Watts., R., Meyer., J., van Leeuwen., D., Selkirk. and J.. (2008) Spectroscopic Contrast-agent imaging with the Medipix CT-Scanner "MARS". Christchurch, New Zealand: Engineering and Physical Sciences in Medicine and the Australian Biomedical Engineering Conference 2008 (epsm abec 2008), 16-20 Nov 2008. (Conference Contribution - Full conference paper)
  • Reinisch, L., Chen, T., Alhabden, M.A., Butler, P., Alzaidi, S., Sorell, G. and Bird, M. (2007) Optical Fluorescence Background in Optical Fibre Scintillator Dosimeters. Fremantle, Australia: Engineering & Physical Sciences in Medicine - The Australian Biomedical Engineering Conference 2007 (EPSM-ABEC 2007), 14-18 Oct 2007. In Australasian Physical & Engineering Sciences in Medicine 30(4) 382. (Conference Contribution - Abstract)
  • Gresnigt, N.G., Renaud, P.F. and Butler, P.H. (2007) The stabilized Poincare-Heisenberg algebra: A Clifford algebra viewpoint. International Journal of Modern Physics D: Gravitation; Astrophysics and Cosmology 16(9): 1515-1529. http://dx.doi.org/10.1142/S0218271807010857. (Journal Article)
  • Butler, P.H. (2006) Brian Wybourne: his life at Canterbury. Nicolaus Copernicus University, Torun, Poland: Professor Brian G Wybourne Commemorative Meeting, 12-14 Jun 2005. In Symmetry, Spectroscopy and SCHUR: Proceedings of the Professor Brian G. Wybourne Commemorative Meeting, Torun, Poland 3-10. (Conference Contribution - Paper in published proceedings)
  • Butler, P.H., Gillard, A.B., Gresnigt, N.G., Joyce, W.P., Martin, B.M. and Renaud, P.F. (2006) Physics with a real Clifford algebra. Nicolaus Copernicus University, Torun, Poland: Professor Brian G Wybourne Commemorative Meeting, 12-14 Jun 2005. In Symmetry, Spectroscopy and SCHUR: Proceedings of the Professor Brian G. Wybourne Commemorative Meeting, Torun, Poland 39-48. (Conference Contribution - Paper in published proceedings)
  • CMS Collaboration. (2005) CMS: The computing project technical design report. CERN-LHCC-2005-023. 166 pp. (Report for External Body)
  • Cahyadi, V. and Butler, P.H. (2005) Introducing discipline-specific education research: A professional development course for teaching assistants. Sydney, Australia: Higher Education Research and Development Society of Australasia (HERDSA) Annual Conference: Higher Education in a Changing World, 3-6 Jul 2005. In Research and Development in Higher Education: Proceedings of the 2005 HERDSA 28 79-85. http://conference.herdsa.org.au/2005/abstracts/abstract112.cfm. (Conference Contribution - Paper in published proceedings)
  • Cahyadi, V., Butler, P.H. and Reid, M. (2005) Introducing physics education research: A professional development course for teaching assistants. Auckland, New Zealand: New Zealand Institute of Physics Conference, 13-15 Jul 2005. http://nzip.rsnz.org/NZIP2005/ConferenceTimetable.xls. (Conference Contribution - Oral presentation)
  • Butler, P. (2005) Physics at the University of Canterbury. New Zealand Science Review 62(1-2): 20-23. (Journal Article)
  • Butler, P.H., King, R.C. and Smentek, L. (2004) Brian Garner Wybourne - Obituaries. Physics Today 57(5): 77-77. (Journal Article)
  • Cahyadi, M.V. and Butler, P.H. (2004) Undergraduate Student's Understanding of Falling Bodies in Idealized and Real-World Situations. Journal of Research in Science Teaching 41(6): 569-583. http://dx.doi.org/10.1002/tea.20018. (Journal Article)
  • Turner, R.M., Hudson, I.L., Butler, P.H. and Joyce, P.R. (2003) Brain function and personality in normal males: a SPECT study using statistical parametric mapping. NeuroImage 19(3): 1145-1162. http://dx.doi.org/10.1016/S1053-8119(03)00171-X. (Journal Article)
  • Butler, P.H., Joyce, W.P., McAven, L.F. and Searle, B.G. (2003) Recursive calculation of nonprimitive coupling and recoupling brakets. Canadian Journal of Physics 81(8): 1051-1066. http://dx.doi.org/10.1139/p03-074. (Journal Article)
  • Joyce, W.P. and Butler, P.H. (2002) The Geometric Associative Algebras of Euclidean Space. Advances in Applied Clifford Algebras 12(2): 195-233. http://dx.doi.org/10.1007/BF03161247. (Journal Article)
  • Duan, C., Joyce, W., Butler, P.H. and Reid, M.F. (2002) The power of symmetry. Marsden Fund Update 21: 2. (Journal Article)
  • Joyce, W.P., Butler, P.H. and Ross, H.J. (2002) The Racah Wigner category. Canadian Journal of Physics 80(6): 613-632. http://dx.doi.org/10.1139/p02-020. (Journal Article)
  • Shinagawa, K., McAven, L.F., Ross, H.J. and Butler, P.H. (1999) A note on the Faraday rotation in Bi 3+ substituted magnetic garnets.. IEEE Trans. Magn. 35(5): 3163-3138. (Journal Article)
  • McAven, L.F. and Butler, P. H. (1999) Split-standard transformation coefficients: the block-selective conjecture. Journal of Physics A-Mathematical & General 32(43): 7509-7522. (Journal Article)
  • McAven, L. F., Ross, H. J., Shinagawa, K. and Butler, P. H. (1999) The Kerr magnetooptic effect in ferromagnetic CrBr3. Journal of Physics B: Atomic, Molecular and Optical Physics 32: 563-576. (Journal Article)
  • Fan, P.D., Chen, J.Q., McAven, L.F. and Butler, P. (1999) Unique euler angles and self-consistent multiplication tables for double point groups. International Journal of Quantum Chemistry 75(1): 1-- 9. (Journal Article)
  • Longbottom, J. E. and Butler, P. (1999) Why teach science? Setting rational goals for science education. Science Education 83: 473-494. (Journal Article)
  • Joyce, W. and Butler, P. H. (1998) A Category Theory Formulation of the Racah-Wigner Calculus. Singapore: Proceedings of the XXII international colloquium on group theoretical methods in physics, 1998. 131-133. (Conference Contribution - Oral presentation)
  • McAven, L.F. and Butler, P. H. (1998) Space: The antiEuclidean metric from the structure of rotations. Singapore: Proceedings of the XXII international colloquium on group theoretical methods in physics, 1998. 494-498. (Conference Contribution - Other)
  • McAven, L.F., Hamel, A.M. and Butler, P. H. (1998) Split bases and multiplicity separations in symmetric group transformation coefficients. Journal of Physics A-Mathematical & General 32(41): 8363-8372. (Journal Article)
  • McAven, L. F. and Butler, P. H. (1998) The block selective conjecture for calculating a class of symmetric group transformation coefficients. Singapore: Proceedings of the XXII international colloquium on group theoretical methods in physics, 1998. 139-141. (Conference Contribution - Other)
  • Mehrtens, N.W., Smithies, D.J., Walker, E.P. and Butler, P. H. (1997) The blanching process due to copper vapour laser treatment of port-wine stains. Phys. Med. Biol. 42(6): 997-1007. (Journal Article)