Results 301 to 310 of about 210,901 (351)
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Tree Canopy Radiance Measurement System
Optical Engineering, 1989A system is described for obtaining both an estimate of the spatial mean bidirectional reflectance factor (BRF) for a tree canopy (displaying a horizontally heterogeneous foliage distribution) and the statistical significance of that estimate. The system includes a manlift supporting a horizontal beam 7 m long on which are mounted four radiometers ...
William Caldwell, V. C. Vanderbilt
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Tree canopy defoliation impacts avifauna
Forest Ecology and Management, 2018Abstract Tree canopies, critical elements of many ecosystems, are damaged by a variety of processes. We investigate how defoliation of manna gum (Eucalyptus viminalis), a species often over-browsed by koalas (Phascolarctos cinereus), influences winter use of trees by birds at Cape Otway, Victoria, Australia.
Desley A. Whisson +2 more
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Wind noise under a pine tree canopy
The Journal of the Acoustical Society of America, 2015It is well known that infrasonic wind noise levels are lower for arrays placed in forests and under vegetation than for those in open areas. In this research, the wind noise levels, turbulence spectra, and wind velocity profiles are measured in a pine forest.
Richard, Raspet, Jeremy, Webster
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Vascularized materials: Tree-shaped flow architectures matched canopy to canopy
Journal of Applied Physics, 2006In this paper we develop flow architectures for “vascularizing” smart materials that have self-healing capabilities. The flow architectures are configured as two trees matched canopy to canopy. A single stream flows through both trees and bathes every subvolume (crack site) of the material. Several types of tree-tree configurations are optimized. Trees
Sunwoo Kim, Sylvie Lorente, Adrian Bejan
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Architectural Design, 2010
AbstractAs the opportunities for new territories become more limited, the only way is up. Mitchell Schwarzer explores the dizzying heights of the ‘last biotic frontier’ of arboreal architecture with its high platforms, walkways and canopy craft. Challenging in construction and engineering terms, the tree canopy also requires engaging with a different ...
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AbstractAs the opportunities for new territories become more limited, the only way is up. Mitchell Schwarzer explores the dizzying heights of the ‘last biotic frontier’ of arboreal architecture with its high platforms, walkways and canopy craft. Challenging in construction and engineering terms, the tree canopy also requires engaging with a different ...
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Tree canopy displacement and neighborhood interactions
Canadian Journal of Forest Research, 2003Competitive interactions among plants are largely determined by spatial proximity. However, despite their sessile nature, plants have the ability to avoid neighbors by growing towards areas with high resource availability and reduced competition. Because of this flexibility, tree canopies are rarely centered directly above their stem bases and are ...
Christine C Muth, F A Bazzaz
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Electronic Measurement of Tree Canopy Volume
Transactions of the ASAE, 1988ABSTRACT AN electronic tree canopy volume measurement system was developed. The system was based on commercial ultrasonic range transducers with novel digital interface circuitry. The measurement system and a microcomputer were mounted on an orchard air-blast sprayer for testing.
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Soil development under legume tree canopies
Forest Ecology and Management, 1986Abstract Tree legumes influence soil development by altering the physical and chemical properties of the soil beneath the plant canopy. The accumulation of extractable NO 3 and PO 4 in soil beneath the Sonoran Desert woody legumes Prosopis glandulosa and Dalea spinosa was compared to soil from the tree interspaces. Measurements of natural 15 N
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