Now showing items 1-8 of 8

    • Jamming for a 2D granular material 

      Zhang, J; Majmudar, TS; Sperl, M; Behringer, RP (Soft Matter, 2010-07-07)
      This paper focuses on the nature of jamming, as seen in two-dimensional frictional granular systems consisting of photoelastic particles. The photoelastic technique is unique at this time, in its capability to provide detailed ...
    • Magnetic superlens-enhanced inductive coupling for wireless power transfer 

      Huang, D; Urzhumov, Y; Smith, DR; Hoo Teo, K; Zhang, J (Journal of Applied Physics, 2012-03-15)
      We investigate numerically the use of a negative-permeability perfect lens for enhancing wireless power transfer between two current carrying coils. The negative permeability slab serves to focus the flux generated in the ...
    • Relationship between giant panda populations and selected ecosystem services 

      Zhang, J; Pimm, SL; Xu, W; Shi, X; Xiao, Y; Kong, L; Fan, X; ... (8 authors) (Ecosystem Services, 2020-08-01)
      The Convention on Biological Diversity's Aichi Targets address both biodiversity and ecosystem services. We explore the relationship between giant panda populations and three ecosystem services: carbon sequestration, water ...
    • Serum cholesterol levels within the high normal range are associated with better cognitive performance among Chinese elderly 

      Lv, Y-B; Yin, ZX; Chei, C-L; Brasher, MS; Zhang, J; Kraus, VB; Qian, F; ... (10 authors) (Journal of Nutrition, Health and Aging, 2016-03-01)
      © 2016, Serdi and Springer-Verlag France.Objectives: The association between cognitive function and cholesterol levels is poorly understood and inconsistent results exist among the elderly. The purpose of this study is to ...
    • Serum cholesterol levels within the high normal range are associated with better cognitive performance among Chinese elderly 

      Lv, YB; Yin, ZX; Chei, CL; Brasher, MS; Zhang, J; Kraus, VB; Qian, F; ... (10 authors) (Journal of Nutrition, Health and Aging, 2016-03-01)
      Objectives: The association between cognitive function and cholesterol levels is poorly understood and inconsistent results exist among the elderly. The purpose of this study is to investigate the association of cholesterol ...
    • Stress correlations in granular materials: An entropic formulation 

      Lois, G; Zhang, J; Majmudar, TS; Henkes, S; Chakraborty, B; O'Hern, CS; Behringer, RP (Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2009-12-28)
      We study the response of dry granular materials to external stress using experiment, simulation, and theory. We derive a Ginzburg-Landau functional that enforces mechanical stability and positivity of contact forces. In ...
    • Structural templates of disordered granular media 

      Walker, DM; Tordesillas, A; Zhang, J; Behringer, RP; Andò, E; Viggiani, G; Druckrey, A; ... (8 authors) (International Journal of Solids and Structures, 2015-01-01)
      © 2014 Elsevier Ltd. All rights reserved.Granular materials, in common with many complex systems, exhibit a range of self-organization processes that control their mechanical performance. Many of these processes directly ...
    • The effectiveness of the zoning of China's protected areas 

      Xu, W; Li, X; Pimm, SL; Hull, V; Zhang, J; Zhang, L; Xiao, Y; ... (9 authors) (Biological Conservation, 2016-12-01)
      Increasing human numbers and aspirations threaten protected areas worldwide. China faces especially strong pressure since many people live inside protected areas. It has sought to balance human needs and conservation goals ...