Zobrazeno 1 - 10
of 24
pro vyhledávání: '"W. Hallmann"'
Autor:
Gregory S. Amacher, Fanfan W. Hallmann
Publikováno v:
Forest Policy and Economics. 47:46-56
We study a rent-based land use problem where a landowner is uncertain about the timing and extent of an emerging biomass market. Unlike other work, ecosystem service flows, in the form of amenities, and transaction costs impact conversion from agricu
Autor:
Gregory S. Amacher, Fanfan W. Hallmann
Publikováno v:
Natural Resource Modeling. 25:482-510
This paper examines a land use problem where a risk-averse representative landowner is uncertain about the timing and extent of a future biomass market emergence. The risk-averse landowner is expected to maximize his or her expected utility of net pr
Autor:
Jörg‐Ulrich Forner, Heinz W. Hallmann
Publikováno v:
German Research. 27:20-23
Paths shape the appearance of parks and gardens. This was already realised by the pioneers of landscape gardening. The reconstruction of historical paths today can be extremely revealing – and not just from the point of view of historical preservat
Autor:
Heinz W. Hallmann, Jörg‐Ulrich Forner
Publikováno v:
Forschung. 29:14-17
Wege pragen das Gesicht von Garten und Parks. Das wussten schon die Pioniere der Landschaftsgartnerei. Wenn heute historische Wege rekonstruiert werden, ist dies nicht nur fur die Denkmalpflege aufschlussreich
Publikováno v:
Acta Astronautica. 24:399-404
After detailed studies of pubished lierature on the ambient conditions on Mars, a solar-balloon system has been geometrically optimized. A one-body solar-balloon system with an integrated, hermetically sealed, helium lifting balloon has been chosen.
Autor:
W. Hallmann
Publikováno v:
The Aeronautical Journal. 90:385-392
Two hundred years ago the first manned balloon launch was attempted. On 21st November 1783 the hot air balloon, Montgolfiere, carried two men, the adventurer Pilatre von Roxier and the Marquis D’Arlandes, nine kilometres during their twenty minute
Autor:
Tariq B Iftikhar, Bruce W Hallmann
Publikováno v:
Orthopedics. 8:1003-1005
Publikováno v:
The Journal of bone and joint surgery. American volume. 66(7)
Publikováno v:
3rd Tethers in Space/ Toward Flight International Conference.
Publikováno v:
The Journal of Bone & Joint Surgery. 66:1108-1109