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Sökning: WFRF:(Sondhi S L)

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  • Isakov, S V, et al. (författare)
  • Magnetization process of spin ice in a [111] magnetic field
  • 2004
  • Ingår i: Physical Review B. - : American Physical Society. - 1550-235X. ; 70:10, s. 104418-
  • Tidskriftsartikel (refereegranskat)abstract
    • Spin ice in a magnetic field in the [111] direction displays two magnetization plateaus: one at saturation and an intermediate one with finite entropy. We study the crossovers between the different regimes from a point of view of (entropically) interacting defects. We develop an analytical theory for the nearest-neighbor spin ice model, which covers most of the magnetization curve. We find that the entropy is nonmonotonic, exhibiting a giant spike between the two plateaus. This regime is described by a monomer-dimer model with tunable fugacities. At low fields, we develop an RG treatment for the extended string defects, and we compare our results to extensive Monte Carlo simulations. We address the implications of our results for cooling by adiabatic (de)magnetization.
  • Demiris, G., et al. (författare)
  • Patient-centered Applications : Use of Information Technology to Promote Disease Management and Wellness. A White Paper by the AMIA Knowledge in Motion Working Group
  • 2008
  • Ingår i: JAMIA Journal of the American Medical Informatics Association. - 1067-5027 .- 1527-974X. ; 15:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Advances in information technology (IT) enable a fundamental redesign of health care processes based on the use and integration of electronic communication at all levels. New communication technologies can support a transition from institution centric to patient-centric applications. This white paper defines key principles and challenges for designers, policy makers, and evaluators of patient-centered technologies for disease management and prevention. It reviews current and emerging trends, highlights challenges related to design, evaluation, reimbursement and usability, and reaches conclusions for next steps that will advance the domain. © 2008 J Am Med Inform Assoc.
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