12,549 research outputs found

    Monitoramento da liberação de CO2 de solo sob diferentes sistemas de cultivo e manejos de arroz irrigado.

    Get PDF
    bitstream/item/43848/1/boletim-124.pd

    Is the effect of birth weight on early breast cancer mediated through childhood growth?

    Get PDF

    Residual do herbicida atrazina em solo cultivado com milho e na água de irrigação de arroz cultivado em sequência.

    Get PDF
    bitstream/item/60627/1/boletim-137.pd

    Hidrólise de diacetato de fluoresceína como bioindicador da qualidade de solo de várzea subtropical.

    Get PDF
    bitstream/item/31534/1/comunicado-231.pd

    Ising Spin Glass in a Transverse Magnetic Field

    Full text link
    We study the three-dimensional quantum Ising spin glass in a transverse magnetic field following the evolution of the bond probability distribution under Renormalisation Group transformations. The phase diagram (critical temperature TcT_c {\em vs} transverse field Γ\Gamma) we obtain shows a finite slope near T=0T=0, in contrast with the infinite slope for the pure case. Our results compare very well with the experimental data recently obtained for the dipolar Ising spin glass LiHo0.167_{0.167}Y0.833_{0.833}F4_4, in a transverse field. This indicates that this system is more apropriately described by a model with short range interactions than by an equivalent Sherrington-Kirkpatrick model in a transverse field.Comment: 7 pages, RevTeX3, Nota Cientifica PUC-Rio 23/9
    corecore