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  • Towards an expert system in Ion-exclusion Chromatography by means of multiple classification Ripple-Down rules
    (1998) Ramadan, Ziad; Mulholland, Mary; Hibbert, D. Brynn; Preston, P; Compton, Paul; Haddad, Paul
    Journal Article
  • From Multiple Classification RDR to Configuration RDR
    (1998) Ramadan, Ziad; Byrnes-Preston, Philip; Le-Gia, Thong; Chellen, Vija; Compton, Paul; Mulholland, Mary; Hibbert, D. Brynn; Haddad, Paul; Kang, Byeong
    Conference Paper
    Ripple Down Rules (RDR) is a knowledge acquisition method for knowledge based systems (KBS) which facilitates incremental acquisition of knowledge and ensures that the previous performance of the KBS is not degraded by the incremental addition of the new knowledge. This approach is now well established for single classification tasks and more recently has been extended to multiple classification tasks. This paper describes the further extension of the approach to configuration tasks. The test domain for this study is the configuration of ion chromatography methods in analytical chemistry.
  • A trade-off between domain knowledge and problem-solving method power
    (1998) Compton, Paul; Ramadan, Ziad; Preston, P; Le-Gia, Thong; Chellen, Vija; Mullholland, M; Hibbert, D. Brynn; Haddad, Paul; Kang, B
    Conference Paper
    The major focus of recent knowledge acquisition research has been on problem-solving methods (PSM). This paper present results where a PSM developed for classification has been extended to handle a configuration or parametric design task, designing ion chromatography methods in analytical chemistry. Surprisingly good results have been obtained seemingly because any knowledge that has been added to the knowledge base, has been added precisely to overcome any limitations of the PSM. These results suggest a trade-off between domain knowledge and the power of the PSM and that greater use of domain knowledge would facilitate re-use by allowing PSMs to be used for a broader range of tasks.
  • Vortex-Glass-Liquid Teansition in Bi2Sr2CaCu2O8/Bi2Sr2Ca2Cu2O8 intergrowth single crystals
    (1998) Han, Shaowei; Zhao, Yong; Yang, C; Cheng, Chun-Chung; Zhang, Hua; Gu, Genda; Russell, Graeme; Koshizu, N
    Journal Article
  • Vortex-glass liquid transition in Bi2Sr2CaCu2O8/Bi2Sr2Ca2Cu3O10 intergrowth single crystals
    (1998) Han, Shaowei; Zhao, Yong; Yang, C; Cheng, Chun-Chung; Zhang, Hua; Gu, Genda; Russell, Graeme; Koshizuka, N
    Journal Article
    The vortex-glass-liquid transition in Bi---Sr---Ca---Cu---O (BSCCO) intergrowth single crystals in which some CuO2 trilayers are inserted into the Bi2Sr2CaCu2O8 matrix has been studied. The curvature of the log V-logI curves for CuO2 trilayers is found to change from negative to positive with increasing magnetic field and a scaling behaviour for the vortex-glass state is observed. The magnetic field dependence of the vortex-glass transition temperature, TG, qualitatively obeys the relation H(TG) (Tc − Tg)2v0, with v0 = 1.15 ± 0.2, which is larger than the 2/3 predicted theoretically for an isotropic 3D system. Our results reveal that the vortex-glass transition exists in a system constructed with CuO2 trilayers.
  • Photocatalytic degradation model and solar pilot scale studies: Application to cyanotoxin microcysin-LR
    (1998) Feitz, Andrew; Waite, David; Jones, Garth; Boyden, B
    Conference Paper