Arts Design & Architecture

Publication Search Results

Now showing 1 - 10 of 283
  • (1998) Wool, R; Kusefoglu, S; Khot, S; Zhao, R; Palmese, Gaetano; Boyd, Andrew; Fisher, Keith; Bandyopadhyay, Srikanta; Williams, J; Wang, Chaoyuan
    Conference Paper

  • (1999) Zhao, Yong; Cheng, Chun-Chung; Zhang, Hua
    Journal Article
    The influence of the flux flow on a.c. loss and magnetic penetration process in superconductors has been investigated. Asymptotic solutions of magnetic and electric fields and a.c. loss are presented in the form of a power series of [Lambda], the normalized frequency of the external a.c. magnetic field. The results show that the flux flow retards the response of inner magnetic field to the external one, which results in a deviation from the critical state model and a non-hysteretic loss. In the cases of H0>Hp, the deviation from the critical state is in the order of the second power of [Lambda]. The induced electric field and the macro-penetration depth are decreased by the slowdown of the flux movement, giving a negative contribution to the a.c. loss. However, the negative contribution is compensated by the increase of the current density, leading to a net increase of the a.c. loss. As a result, the a.c. loss exhibits a positive dependence on the frequency and the amplitude of the external magnetic field.

  • (1999) Zhang, Hua; Zhao, Yong; Cheng, Chun-Chung
    Journal Article
    Low-temperature thermal expansion and its correlation with oxygen nonstoichiometry have been studied for Bi1.7Pb0.3Sr2Ca2Cu3O10+y samples. An anomalously big jump of the thermal expansion in the c direction of Bi1.7Pb0.3Sr2Ca2Cu3O10+y has been observed at a temperature slightly above the superconductivity transition temperature. The corresponding temperature and the magnitude of the jump are found to be correlated with the oxygen nonstoichiometry, carrier concentration and superconductivity. The results reveal that the anomalously big jump of the thermal expansion is an electron-assisted lattice softening transition. Its correlation with the superconductivity suggests that phonon-electron interaction still plays a certain role in the superconductivity in high-Tc cuprates.

  • (1998) Han, Shaowei; Zhao, Yong; Yang, C; Cheng, Chun-Chung; Zhang, Hua; Gu, Genda; Russell, Graeme; Koshizu, N
    Journal Article

  • (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.


  • (1998) Motalebi-Esfidvajani, Ghasem
    Thesis

  • (1986) Armstrong, Helen
    Thesis
    This study covers the history of street and roadside planting in New South Wales from the beginning of settlement to the present. It is divided into three sections. The first section examines the context within which the settlement occurred by exploring the eighteenth century attitudes to the layout of colonial towns and the use of trees in urban areas. It also considers the importance of botany at this time and the effect of botanical investigations on the settlement, ultimately influencing the choice of trees used as avenues, particularly the rainforest trees. The second section documents the sources of trees used for street and roadside planting and the influences which brought about the different eras of planting. The third section summarizes the complicated history of events, issues, individuals and institutions which were involved in the different periods of street and roadside planting as a series of chronologies. This section also examines street and roadside planting in the towns of New South Wales today. The survey of the planting in contemporary towns verifies the historical eras of planting and reveals the important effect of the physical regions of the State on the choice of the species. The study shows that the composite history of the influence of the eighteenth century, the use of rainforest trees and the effect of regional variations in the State has created a particular street and roadside planting which is characteristic of New South Wales. In addition this work reveals that avenues of trees have been incorporated as important elements in town design from the earliest plans to the present.

  • (1993) O'Donnell, Cornelius
    Thesis