Zobrazeno 1 - 10
of 72
pro vyhledávání: '"J. B. Parkinson"'
Autor:
J. B. Parkinson, G.J. Levermore
Publikováno v:
Building Services Engineering Research and Technology. 38:21-31
The urban heat island intensity is the difference in temperature between a site close to the centre of a city and a site close to but outside the city (the rural site). The urban heat island intensity varies continuously throughout the day and is str
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf8afa19e85ab9df4abd1af179691007
https://doi.org/10.1177/0143624416659323
https://doi.org/10.1177/0143624416659323
Autor:
Geoff Levermore, J. B. Parkinson
Publikováno v:
Building Services Engineering Research and Technology. 27:311-325
With the increasing use of simulation for building design, test reference years (TRYs) are required for energy analyses and design summer years (DSYs) for assessing natural ventilation in the summer. Previously TRYs and DSYs only existed for three si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6f8fe1fd6fce0b14dd00ab91016d33e3
https://doi.org/10.1177/0143624406071037
https://doi.org/10.1177/0143624406071037
Autor:
J. B. Parkinson
Publikováno v:
Journal of Physics: Condensed Matter. 16:S5233-S5241
Chains of quantum spins with open ends and isotropic Heisenberg exchange are studied. By diagonalizing the Hamiltonian for chains of finite length N and obtaining all the energy eigenvalues, the magnetic susceptibility X, the specific heat C v , and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d18e83313f798585cbdd111468caeaeb
https://doi.org/10.1088/0953-8984/16/44/020
https://doi.org/10.1088/0953-8984/16/44/020
Publikováno v:
Journal of Physics: Condensed Matter. 16:2407-2419
We consider small symmetric clusters of magnetic atoms (spins) with anisotropic exchange interaction between the atoms in a magnetic field at zero temperature. The inclusion of the anisotropy leads to a wealth of different phases as a function of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::397dd6f6361a467cbd8afbac65374ca4
https://doi.org/10.1088/0953-8984/16/13/019
https://doi.org/10.1088/0953-8984/16/13/019
Publikováno v:
Journal of Physics: Condensed Matter. 14:45-58
We study the zero-temperature magnetization of small clusters in which the atoms are coupled by an isotropic Heisenberg antiferromagnetic interaction. We obtain either a full or partial energy spectrum. From this we obtain the magnetization curves as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::299d0d24f3e7b025b0443f0b26fdc4c7
https://doi.org/10.1088/0953-8984/14/1/305
https://doi.org/10.1088/0953-8984/14/1/305
Autor:
J Timonen, J. B. Parkinson
Publikováno v:
Journal of Physics: Condensed Matter. 12:8669-8682
We study small symmetrical clusters of magnetic ions with Heisenberg antiferromagnetic exchange interaction. We calculate the magnetization and the specific heat as functions of applied magnetic field at zero and non-zero temperature. Results are giv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d0a2498fb5053535f877f4c1ca07004b
https://doi.org/10.1088/0953-8984/12/40/311
https://doi.org/10.1088/0953-8984/12/40/311
Publikováno v:
Physical Review B. 59:277-285
We study an ${A}_{1\ensuremath{-}x}{B}_{x}$ alloy on a two-dimensional triangular lattice. The ions A and B have different charges, with a background charge to ensure neutrality, and are constrained to lie at the discrete sites defined by a fixed tri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28bff9c82c6d8fc325ffa0a263c24448
https://doi.org/10.1103/physrevb.59.277
https://doi.org/10.1103/physrevb.59.277
Publikováno v:
Physical Review B. 58:6394-6402
The coupled cluster method (CCM) is a well-known method of quantum many-body theory, and in this article we present an application of the CCM to the spin-half ${J}_{1}{\ensuremath{-}J}_{2}$ quantum spin model with nearest- and next-nearest-neighbor i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85efadb1728a9ff69c7d57082b495e6a
https://doi.org/10.1103/physrevb.58.6394
https://doi.org/10.1103/physrevb.58.6394
Publikováno v:
Journal of Physics: Condensed Matter. 9:7601-7608
We study quantum spin systems in the 1D, 2D square and 3D cubic lattices with nearest-neighbour XY exchange. We use the coupled-cluster method (CCM) to calculate the ground-state energy, the T=0 sublattice magnetisation and the excited state energies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c30934f1093ab83f0c40e8842eccebd
https://doi.org/10.1088/0953-8984/9/36/008
https://doi.org/10.1088/0953-8984/9/36/008
Representative, site-specific weather data is a key requirement for building performance simulation. In the UK, such data is available in two formats, Test Reference Years for analysing building services loads under ‘typical’ year conditions and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::01a0ea88c2a555f10dec2e0987c5f42a
