Tampere University of Technology

TUTCRIS Research Portal

Publications

  1. Published

    SBNR processor for stack filters

    Akopian, D., Vainio, O., Again, S. & Astola, J., 1994, Proc. Twenty-Eighth Annual Asilomar Conference on Signals, Systems and Computers, Pacific Grove, CA, Oct. 1994.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  2. Published

    A multistage interconnection network for parallel Viterbi decoders

    Akopian, D., Takala, J., Astola, J. & Saarinen, J., 1997, Proceedings of MICC'97 & ISPACS'97, 3rd IEEE Malaysia International Conference on Communications, 5th IEEE international Workshop on Intelligent Signal Processing and Communication Systems, 11-13 November, Malaysia, 1997. IEEE, p. s. 1S6.6.1-S16.6.5

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  3. Published

    Combined Multibase/Wavelet Transform Coding of Still Images

    Akopian, D., Helsingius, M. & Astola, J., 1998, The 6th IEEE International Workshop on Intelligent Signal Processing and Communication Systems, 5-6 November 1998, Melbourne, Australia. Wu, H. R., Ngan, K. N., Qiu, B. & Suthaharan, S. (eds.). p. 696-700

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  4. Published

    Regular fast algorithms for trigonometric transforms

    Akopian, D. & Takala, J., 2009, Festschrift in Honor of Jaakko Astola on the Ocasion of his 60th Birthday. Tabus, I., Egiazarian, K. & Gabbouj, M. (eds.). Tampere: Tampereen teknillinen yliopisto, p. 263-286 (TICSP Series).

    Research output: Chapter in Book/Report/Conference proceedingChapterScientific

  5. Published

    SBNR processor for stack filters

    Akopian, D., Vainio, O., Agaian, S. & Astola, J., 1997, In : IEEE Transactions on Circuits and Systems Part 2: Analog and Digital Signal Processing. 44, 3, p. 197-208

    Research output: Contribution to journalArticleScientificpeer-review

  6. Published

    An optimal nonlinear extension of linear filters

    Akopian, D. & Astola, J., 1997, Proceedings of Computer Science and Information Technologies Conference, CSIT, Yerevan, Armenia, Sept.25-30, 1997. p. 141-144

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  7. Published

    A multistage interconnection network for parallel viterbi decoders

    Akopian, D., Takala, J., Astola, J. & Saarinen, J., 1997, Proceedings of FINSIG'97 Conference, May 22, Pori, Finland, 1997. p. 11-15

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  8. Published

    Processors for Generalized Stack Filters

    Akopian, D., Vainio, O., Agaian, S. & Astola, J., 1995, In : IEEE Transactions on Signal Processing. 43, 6, p. 1541-1546

    Research output: Contribution to journalArticleScientificpeer-review

  9. Published

    A Predictive Multiscanning Approach for Still Image Compression

    Akopian, D. & Astola, J., 1999, Proceedings of the Conference, Computer Science and Information Technologies, CSIT, August 17-22, 1999, Yerevan, Armenia. p. 243-246

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  10. Published

    Multistage Interconnection Networks for Parallel Viterbi Decoders

    Akopian, D., Takala, J., Saarinen, J. & Astola, J. T., 2000, Proceedings of First International Workshop on Spectral Techniques and Logic Design for Future Digital Systems, June 2-3, 2000, Tampere, Finland. Creutzburg, R. (ed.). Tampere, p. 131-153

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  11. Published

    Fast Architecture Oriented Algorithms for4 Trigonometric Transforms and Their Mapping to Scalable Stuctures

    Akopian, D. & Astola, J., 1998, Proceedings of First International Workshop on Transforms and Filterbanks, February 23-25, 1998, Tampere, TICSP Series. p. 433-470

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  12. Published

    An optimal nonlinear extension of linear filters based on distributed arithmetic

    Akopian, D. & Astola, J., 1997, Proceedings of SPIE, Statistical and Stochastic Methods in Image Processing II, San Diego, California, 31 July - 1 August 1997. SPIE, p. 2-12

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  13. Published

    Multibase/Wavelet Transform Coding of Still Images Without Blocking Artifacts

    Akopian, D., Helsingius, M. & Astola, J., 1998, Thirty-Second Asilomar Conference on Signals, Systems & Computers, November 1-4, 1998, Pacific Grove, California. p. 154-158

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  14. Published

    Multistage Interconnection Networks for Parallel Viterbi Decoders

    Akopian, D., Takala, J., Saarinen, J. & Astola, J., 2003, In : IEEE Transactions on Communications. 51, 9, p. 1536-1545

    Research output: Contribution to journalArticleScientificpeer-review

  15. Published

    Structure of amorphous Ge8Sb2Te11: GeTe-Sb2Te3 alloys and optical storage

    Akola, J. & Jones, R. O., 2009, In : Physical Review B. 79, 13, p. 134118-1-8 8 p., 134118.

    Research output: Contribution to journalArticleScientificpeer-review

  16. Structural phase transitions on the nanoscale: The crucial pattern in the phase-change materials Ge2Sb2Te5 and GeTe

    Akola, J. & Jones, R. O., 2007, In : Physical Review B. 76, 23, 235201.

    Research output: Contribution to journalArticleScientificpeer-review

  17. Published

    Phase change materials: density functional/molecular dynamics simulations of Ag/In-doped Sb4Te Alloy

    Akola, J. & Jones, O. R., 2012, IEEE 12th International Conference on Nanotechnology, IEEE NANO 2012, 20-23 August 2012, Birmingham, UK. Piscataway, NJ: Institute of Electrical and Electronics Engineers IEEE, p. 131-136 (IEEE Conference on Nanotechnology).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  18. Binary alloys of Ge and Te: Order, voids, and the eutectic composition

    Akola, J. & Jones, R. O., 2008, In : Physical Review Letters. 100, 20, 205502.

    Research output: Contribution to journalArticleScientificpeer-review

  19. Published

    Comment on Formation of Large Voids in the Amorphous Phase-Change Memory Ge2Sb2Te5 Alloy

    Akola, J. & Jones, R. O., 2010, In : Physical Review Letters. 104, p. 1 019603.

    Research output: Contribution to journalArticleScientific

  20. Published

    Thiolate-protected Au25 superatoms as building blocks: dimers and crystals

    Akola, J., Kacprzak, K. A., Lopez-Acevedo, O., Walter, M., Grönberg, H. & Häkkinen, H., 2010, In : Journal of Physical Chemistry C. 114, 38, p. 15986-15994

    Research output: Contribution to journalArticleScientificpeer-review

  21. Published

    Structure and dynamics in amorphous tellurium and Ten clusters: A density functional study

    Akola, J. & Jones, O. R., 2012, In : Physical Review B. 85, 13, p. 1-12 12 p., 134103.

    Research output: Contribution to journalArticleScientificpeer-review

  22. Published

    Polymorphism in amorphous Ge2Sb2Te5: comparison of melt queched and as-deposited structures

    Akola, J., Larrucea, J. & Jones, R. O., 2010, E/PCOS 2010 Proceedings, September 6th-7th, 2010, Milano, Italy. p. 126-133

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  23. Edge-dependent selection rules in magic triangular graphene flakes

    Akola, J., Heiskanen, H. P. & Manninen, M., 2008, In : Physical Review B. 77, 19, 193410.

    Research output: Contribution to journalArticleScientificpeer-review

  24. Published

    Polymorphism in phase-change materials: melt-quenched and as-deposited amorphous structures in Ge2Sb2Te5 from density functional caclulation

    Akola, J., Larrucea, J. & Jones, O. R., 2011, In : Physical Review B. 83, 9, p. 1-7 7 p., 094113.

    Research output: Contribution to journalArticleScientificpeer-review

  25. Published

    Funktionaaliset kalkogeenipohjaiset puolijohdemateriaalit: Järjestystä epäjärjestyksessä?

    Akola, J., 2010, In : Arkhimedes. 4, p. 20-27

    Research output: Contribution to journalArticleProfessional

  26. Experimentally constrained density-functional calculations of the amorphous structure of the prototypical phase-change material Ge2Sb2Te5

    Akola, J., Jones, R. O., Kohara, S., Kimura, S., Kobayashi, K., Takata, M., Matsunaga, T., Kojima, R. & Yamada, N., 2009, In : Physical Review B. 80, 2, 020201.

    Research output: Contribution to journalArticleScientificpeer-review

  27. Electronic properties of single-walled carbon nanotubes inside cyclic supermolecules

    Akola, J., Rytkönen, K. & Manninen, M., 2006, In : Journal of Physical Chemistry Part B. 110, 11, p. 5186-5190

    Research output: Contribution to journalArticleScientificpeer-review

  28. Published

    Structure and dynamics in liquid bismuth and Bin clusters: A density functional study

    Akola, J., Atodiresei, N., Kalikka, J., Larrucea, J. & Jones, O., 2014, In : Journal of Chemical Physics. 141, 19, p. 1-10 10 p., 194503.

    Research output: Contribution to journalArticleScientificpeer-review

  29. Density functional calculations of ATP systems. 2. ATP hydrolysis at the active site of actin

    Akola, J. & Jones, R. O., 2006, In : Journal of Physical Chemistry Part B. 110, 15, p. 8121-8129

    Research output: Contribution to journalArticleScientificpeer-review

  30. Published

    Network topology for the formation of solvated electrons in binary CaO-Al2O3 composition glasses

    Akola, J., Kohara, S., Ohara, K., Fujiwara, A., Watanabe, Y., Masuno, A., Usuki, T., Kubo, T., Nakahira, A., Nitta, K., Uruga, T., Weber, R. J. K. & Benmore, C. J., 2013, In : Proceedings of the National Academy of Sciences of the United States of America. 110, 25, p. 10129-10134 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  31. Experimentally constrained density-functional calculations of the amorphous structure of the prototypical phase-change material Ge2Sb2Te5 (vol 80, 020201, 2009)

    Akola, J., Jones, R. O., Kohara, S., Kimura, S., Kobayashi, K., Takata, M., Matsunaga, T., Kojima, R. & Yamada, N., 2009, In : Physical Review B. 80, 2, 029902.

    Research output: Contribution to journalArticleScientific

  32. Published

    Amorphous structures of Ge/Sb/Te alloys: Density functional simulations

    Akola, J. & Jones, O. R., 2012, In : Physica Status Solidi B: Basic Solid State Physics. 249, 10, p. 1851-1860

    Research output: Contribution to journalArticleScientificpeer-review

  33. Density functional study of gold atoms and clusters on a graphite (0001) surface with defects

    Akola, J. & Häkkinen, H., 2006, In : Physical Review B. 74, 16, 165404.

    Research output: Contribution to journalArticleScientificpeer-review

  34. Published

    Density variations in liquid tellurium: Roles of rings, chains and cavities

    Akola, J., Jones, R. O., Kohara, S., Usuki, T. & Bychkov, E., 2010, In : Physical Review B. 81, 094202, p. 094202-1-7 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  35. Published

    Structure of liquid phase change material AglnSbTe from density functional/molecular dynamics simulations

    Akola, J. & Jones, R. O., 2009, In : Applied Physics Letters. 94, 251905, p. 251905-1-3 3 p.

    Research output: Contribution to journalArticleScientificpeer-review

  36. On the structure of thiolate-protected Au-25

    Akola, J., Walter, M., Whetten, R. L., Häkkinen, H. & Grönbeck, H., 2008, In : Journal of the American Chemical Society. 130, 12, p. 3756-3757

    Research output: Contribution to journalArticleScientificpeer-review

  37. Density functional study of amorphous, liquid and crystalline Ge2Sb2Te5: homopolar bonds and/or AB alternation?

    Akola, J. & Jones, R. D., 2008, In : Journal of Physics: Condensed Matter. 20, 46, 465103.

    Research output: Contribution to journalArticleScientificpeer-review

  38. Published

    Structure, electronic, and vibrational properties of amorphous AsS2 and AgAsS2: Experimentally constrained density functional study

    Akola, J., Jovari, P., Kaban, I., Voleska, I., Kolar, J., Wagner, T. & Jones, O., 2014, In : Physical Review B. 89, 6, p. 1-9 9 p., 064202.

    Research output: Contribution to journalArticleScientificpeer-review

  39. Published

    Atomic and electronic structures of binary silicate glasses

    Akola, J. & Kohara, S., 2012, SPring-8 Research Frontiers 2011. Hyogo, Japan: RIKEN/JASRI; Japan Synchrotron Radiation Research Institute (JASRI), p. 58-59

    Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

  40. Density functional calculations of ATP systems. 1. Crystalline ATP hydrates and related molecules

    Akola, J. & Jones, R. O., 2006, In : Journal of Physical Chemistry Part B. 110, 5, p. 8110-8120

    Research output: Contribution to journalArticleScientificpeer-review

  41. Published

    Unravelling the atomic structure of AgInSbTe phase change materials: Theoretical perspective

    Akola, J. & Jones, R. O., 2011, European\Phase Change and Ovonics Symposium E/PCOS2011 Proceedings, Zurich, Switzerland, 2011. Zurich: E\PCOS, p. 10-17 (European\Phase Change and Ovonics Symposium).

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  42. Published

    The Prototype Phase Change Material Ge2Sb2Te5: Amorphous structure and crystallization

    Akola, J., Kalikka, J. & Jones, R. O., 2015, Molecular Dynamics Simulations of Disordered Materials: From Network Glasses to Phase-Change Memory Alloys. Springer International Publishing, p. 457-484 28 p. (Springer Series in Materials Science; vol. 215).

    Research output: Chapter in Book/Report/Conference proceedingChapterScientificpeer-review

  43. ATP hydrolysis in water - A density functional study

    Akola, J. & Jones, R. O., 23 Oct 2003, In : Journal of Physical Chemistry Part B. 107, 42, p. 11774-11783 10 p.

    Research output: Contribution to journalArticleScientificpeer-review

  44. Branching reactions in polycarbonate: A density functional study

    Akola, J. & Jones, R. O., 25 Feb 2003, In : Macromolecules. 36, 4, p. 1355-1360 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  45. Aluminum-lithium clusters: First-principles simulation of geometries and electronic properties

    Akola, J. & Manninen, M., 15 Jun 2002, In : Physical Review B. 65, 24, 8 p., 245424.

    Research output: Contribution to journalArticleScientificpeer-review

  46. Reactions of polycarbonate with cyclohexene oxide and phosphites: A density functional study

    Akola, J., Ballone, P. & Jones, R. O., 12 Mar 2002, In : Macromolecules. 35, 6, p. 2327-2334 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  47. Metallic evolution of small magnesium clusters

    Akola, J., Rytkönen, K. & Manninen, M., Sep 2001, In : European Physical Journal D. 16, 1-3, p. 21-24 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

  48. Heating of Al-13(-) and Al-14 clusters

    Akola, J. & Manninen, M., 15 May 2001, In : Physical Review B. 63, 19, 4 p., 193410.

    Research output: Contribution to journalArticleScientificpeer-review

  49. Published

    Aluminum cluster anions: Photoelectron spectroscopy and ab initio simulations

    Akola, J., Manninen, M., Häkkinen, H., Landman, U., Li, X. & Wang, L-S., 15 Nov 2000, In : Physical Review B. 62, 19, p. 13216-13228 13 p.

    Research output: Contribution to journalArticleScientificpeer-review

  50. Temperature-dependent ionization potential of sodium clusters

    Akola, J., Rytkönen, A., Häkkinen, H. & Manninen, M., Jan 2000, In : European Physical Journal D. 8, 1, p. 93-99 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

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