JOURNAL OF LOW TEMPERATURE PHYSICS

EDITORIAL
     N.Sullivan, J. Pekola and H. Meyer...........................................................................................................1


ARTICLES

Tree Method for Quantum Vortex Dynamics..................................................................................................3
    A.W. Baggaley · C.F. Barenghi

Condensate Fraction in Liquid ⁴He at Zero Temperature...............................................................................21
    R. Rota and  J. Boronat

Acoustic Resonances and Non-linearity in Solid ⁴He....................................................................................33
     James Day  and John Beamish

Self-similar Expansion of the Density Profile in a Turbulent Bose-Einstein Condensate...............................49
    M. Caracanhas · A. L. Fetter · S. R. Muniz · K. M. F. Magalh˜aes,
     G. Roati, G. Bagnato and V. S. Bagnato

Magnetic Phase Transitions in bcc ³He.........................................................................................................59
    S. Suzuki · T. Miura · K. Kubo

Adsorption of ⁴He_N and ⁴He_N³He Clusters on Cesium................................................................................68
    P. Stipanović, L. Vranješ Markić, I. Bešlić  and T. Martinić

Classification of Phase Transitions for an Ideal Bose Gas in a D-dimensional Quartic Potential..................80
    Jianhui Wang, Chenyan Zhang, and Jizhou He

Effects of Magnetic and Nonmagnetic Impurities on the Transition Temperature of a
 Noncentrosymmetrical Superconductor: Applications to CePt₃Si................................................................90
     H. Yavari and M. Nemati


TECHNICAL NOTE

Characterization of White LEDs at Cryogenic (4 K) Temperatures............................................................101
    Jean-Charles Forgues and Christian Lupien