Zobrazeno 1 - 10
of 51
pro vyhledávání: '"M. J. Stephen"'
Autor:
H. V. Tran, L. T. Nguyen, N. T. Nguyen, T. H. T. Tran, M.T. T. Nguyen, M. D. Pham, M. J. Stephen
Publikováno v:
Alcohol and Alcoholism. 49:i50-i50
Introduction. High coverage and retention in MMT is essential to achieving the goal of reducing the number of those with severe drug dependence in Vietnam and their HIV risks. This study assessed retention and factors associated with in MMT services
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1395ce6401e872a7728a3fcaed57538
https://doi.org/10.1093/alcalc/agu053.60
https://doi.org/10.1093/alcalc/agu053.60
Publikováno v:
BMJ. 309:1582-1582
EDITOR,—Like M E Cupples and A McKnight, we are interested in health promotion in general practice for patients with a high cardiovascular risk.1 We surveyed 34 patients one year after coronary artery bypass grafting. In relation to exercise, as mi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39e4abea86eedecf1f1e1f71318a07e6
https://doi.org/10.1136/bmj.309.6968.1582
https://doi.org/10.1136/bmj.309.6968.1582
Autor:
M J Stephen
Publikováno v:
Journal of Physics C: Solid State Physics. 14:L1077-L1080
The diffusion of a particle on a random directed hypercubic lattice is studied in the effective medium approximation. The particle may hop between nearest-neighbour sites and the hopping probabilities may depend on the direction of the hop. The phase
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dcc4ef23ebefe5a9fb0a02ead680e093
https://doi.org/10.1088/0022-3719/14/34/002
https://doi.org/10.1088/0022-3719/14/34/002
Autor:
L Mittag, M J Stephen
Publikováno v:
Journal of Physics A: Mathematical, Nuclear and General. 7:L109-L112
A mean-field theory of the q-component Potts model is given. The transition is first order for q>or=3. For large q the mean-field results agree with all the known exact results in two dimensions for the Potts model. It is conjectured that the mean-fi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03eee2866d3589f24cefe52eb21dc434
https://doi.org/10.1088/0305-4470/7/9/003
https://doi.org/10.1088/0305-4470/7/9/003
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences. 278:311-341
Measurements have been made of the onset of the superconducting phase transition of tin whiskers (single crystals of diameter 1—2 μm and length several millimetres) as a function of temperature T , magnetic field H , and elastic strain ε up to 2%
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69bbd53ed99a10885d198f603c29cc51
https://doi.org/10.1098/rsta.1975.0027
https://doi.org/10.1098/rsta.1975.0027
Autor:
Amnon Aharony, M J Stephen
Publikováno v:
Journal of Physics C: Solid State Physics. 14:1665-1670
The concentration dependence of the ferromagnetic ordering temperature, Tc(p) in a dilute bond Ising model,, is studied for several long-range interactions near the limit p to 0, Tc to 0. The critical region of the random Ising model transition, occu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22666ae186d3e1748d661ef4d3f8ed31
https://doi.org/10.1088/0022-3719/14/11/026
https://doi.org/10.1088/0022-3719/14/11/026
Autor:
C De Dominicis, M J Stephen
Publikováno v:
Journal of Physics C: Solid State Physics. 11:L969-L972
The thermodynamics at low temperatures of an Ising spin system with random ferromagnetic and antiferromagnetic bonds is considered. It is shown that the replica method leads to expansions for the free energy and correlation functions in terms of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aeafea638e1efecf581191f188b09e26
https://doi.org/10.1088/0022-3719/11/24/008
https://doi.org/10.1088/0022-3719/11/24/008
Autor:
Amnon Aharony, M J Stephen
Publikováno v:
Journal of Physics C: Solid State Physics. 13:L407-L414
Random Ising models are conveniently treated by the replica method. The authors study the duality relations for general symmetrically coupled Ising models on a square lattice in two dimensions. General conditions for self-duality are found and a numb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2948a3716419c18b2cf849939c8f915
https://doi.org/10.1088/0022-3719/13/16/001
https://doi.org/10.1088/0022-3719/13/16/001
Autor:
M J Stephen, S John
Publikováno v:
Journal of Physics C: Solid State Physics. 17:L559-L564
The density of localised states in the low-energy tail for an electron in a gaussian random potential with long-range spatial correlations is found by evaluating instanton contributions to the n to 0 replica field representation of the one-electron G
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe96dcfec371bf1d3e68f4d2d732fac4
https://doi.org/10.1088/0022-3719/17/22/004
https://doi.org/10.1088/0022-3719/17/22/004
Autor:
M R Giri, M J Stephen
Publikováno v:
Journal of Physics C: Solid State Physics. 11:L541-L545
A random-bond Ising model which exhibits ferromagnetic, antiferromagnetic and spin-glass transitions is studied using the n-replica method. A mean-field phase diagram is obtained for the model near the percolation threshold and it is found that only
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ceb47c1fb33c4adb33316195cb40b3b7
https://doi.org/10.1088/0022-3719/11/13/009
https://doi.org/10.1088/0022-3719/11/13/009