Zobrazeno 1 - 10
of 44
pro vyhledávání: '"B.D. Hahn"'
Autor:
B.D. Hahn, F.D. Richardson
Publikováno v:
Agricultural Systems. 95:62-75
In this paper, we present the results of an evaluation and report on an application of a short-term (one to two years) mechanistic model of plant and livestock production in the semi-arid Succulent Karoo of Namaqualand in South Africa. The model has
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::422d27f93c224b2122309cbdb287773d
https://doi.org/10.1016/j.agsy.2007.04.003
https://doi.org/10.1016/j.agsy.2007.04.003
Publikováno v:
Agricultural Systems. 62:29-49
Rangelands are complex systems with many interacting components. Modelling such systems presents two particular and interrelated problems. Firstly, the processes involved operate on greatly differing time scales: long-term changes in rangelands typic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::913f7a5d617de00418043a664574de2d
https://doi.org/10.1016/s0308-521x(99)00054-2
https://doi.org/10.1016/s0308-521x(99)00054-2
Publikováno v:
Journal of the Grassland Society of Southern Africa. 8:153-159
An interactive user‐friendly computer package is being developed to assist planners and managers with the evaluation of different livestock production strategies in semi‐arid regions. It comprises a hierarchy of simulation models that predict ove
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::932cb76d205a994c3f324ec48e34443e
https://doi.org/10.1080/02566702.1991.9648283
https://doi.org/10.1080/02566702.1991.9648283
Autor:
B.D. Hahn
Publikováno v:
Journal of Theoretical Biology. 151:123-139
Two small mathematical models of the Calvin photosynthesis cycle and photorespiration are presented. They are compared with a much larger complex model formulated in terms of 31 non-linear differential equations. The smaller models behave in much the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b3eaf038cc74d18e289df1dee47a0065
https://doi.org/10.1016/s0022-5193(05)80147-x
https://doi.org/10.1016/s0022-5193(05)80147-x
Publikováno v:
2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics.
Tube-type piezoelectric motor having a volume of 2times2times10 mm3 was fabricated by aerosol deposition of PZT powder on the square-shaped titanium alloy tube. With applying two channels driving voltage the stator generates two orthogonal bending vi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0d8a00beb1d52aa12612879a3dc2e0fd
https://doi.org/10.1109/isaf.2007.4393399
https://doi.org/10.1109/isaf.2007.4393399
Publikováno v:
2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics.
Lead zirconate titanate (PZT) thick films with thickness of 10 ?m were deposited on silicon and sapphire substrates by aerosol deposition process at room temperature. The films with Zr/Ti ratio of 45/55, 52/48 and 60/40 were fabricated in order to in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cac6c400808e29312267d3d98c532cac
https://doi.org/10.1109/isaf.2007.4393297
https://doi.org/10.1109/isaf.2007.4393297
Akademický článek
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Publikováno v:
African Journal of Range and Forage Science; Vol 8, No 4 (1991); 153-159
An interactive user-friendly computer package is being developed to assist planners and managers with the evaluation of different livestock production strategies in semi-arid regions. It comprises a hierarchy of simulation models that predict over ti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=78975075580c::0705fdbeb8962d645674bdb69c2a3225
https://www.ajol.info/index.php/ajrfs/article/view/889
https://www.ajol.info/index.php/ajrfs/article/view/889
Autor:
B.D. Hahn
Publikováno v:
Nuclear Physics B. 71:172-188
A Froissart-Gribov projection of π N phase shifts and Regge amplitudes is used to evaluate the ππ→ N N scattering length at t =4 μ 2 , and partial waves for −25 μ 2 ⩽ t μ 2 . The new value of the scattering length is 15% higher than a pre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3c87be851a61e205a5898baa0372792
https://doi.org/10.1016/0550-3213(74)90262-4
https://doi.org/10.1016/0550-3213(74)90262-4
Autor:
B.D. Hahn, P.R. Furniss
Publikováno v:
Applied Mathematical Modelling. 5:130-136
An outbreak of anthrax in a single homogeneous geographical region is modelled. The spread of the disease to neigbouring regions is also simulated and the model is compared with data from the 1970 epizootic in the Kruger National Park. Two possible d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5dc70e469322fed4cbda184561c9bbc
https://doi.org/10.1016/0307-904x(81)90034-2
https://doi.org/10.1016/0307-904x(81)90034-2