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Results 11 - 20
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549
Bacterial succession in a glacier foreland of the high Arctic
, 2009
"... Succession is defined as changes in biological communities over time. It has been extensively studied in plant communities, but little is known about bacterial succession, in particular in environments such as High Arctic glacier forelands. Bacteria carry out key processes in the development of soil ..."
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Cited by 10 (1 self)
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Succession is defined as changes in biological communities over time. It has been extensively studied in plant communities, but little is known about bacterial succession, in particular in environments such as High Arctic glacier forelands. Bacteria carry out key processes in the development
An Evolvable Hardware Chip for Illumination Enhancement in Computer Vision for Surface Roughness Estimation
"... Abstract: Machine vision has evolved to become a mainstream automation tool, enabling computers to replace human vision in high speed and precision manufacturing techniques. Images usually acquired through modern cameras may be contaminated by a variety of noise sources and decreasing intensity and ..."
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enhanced image is then processed and a relationship between the feature of the surface image and the actual surface roughness is obtained using polynomial networks. Comparing with the stylus method, the constructed computer vision system is useful method for measuring the surface roughness with faster
2007: Methane release and coastal environment in the East Siberian Arctic shelf
- Journal of Marine Systems
"... In this paper we present 2 years of data obtained during the late summer period (September 2003 and September 2004) for the East Siberian Arctic shelf (ESAS). According to our data, the surface layer of shelf water was supersaturated up to 2500 % relative to the present average atmospheric methane c ..."
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Cited by 11 (3 self)
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In this paper we present 2 years of data obtained during the late summer period (September 2003 and September 2004) for the East Siberian Arctic shelf (ESAS). According to our data, the surface layer of shelf water was supersaturated up to 2500 % relative to the present average atmospheric methane
VERY HIGH RESOLUTION STEREO DTM EXTRACTION AND ITS APPLICATION TO SURACE ROUGHNESS ESTIMATION OVER MARTIAN SURFACE
"... We have developed a processing workflow to extract very high resolution DTMs up to 0.5-4m grid-spacing from HiRise (Kim and Muller, 2007) and 12-18m gridded DTMs from CTX stereo pairs. This workflow relies on combining these data with the outputs of the UCL HRSC stereo processor, which is capable of ..."
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Cited by 1 (0 self)
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We have developed a processing workflow to extract very high resolution DTMs up to 0.5-4m grid-spacing from HiRise (Kim and Muller, 2007) and 12-18m gridded DTMs from CTX stereo pairs. This workflow relies on combining these data with the outputs of the UCL HRSC stereo processor, which is capable
THE USE OF PHOTOGRAMMETRY AND LIDAR FOR LANDSCAPE ROUGHNESS ESTIMATION IN HYDRODYNAMIC STUDIES
"... Flooding is a major problem for many countries causing damage to the environment and pressures on human activity. Engineers use Manning’s coefficient of roughness to determine water flow over floodplains which is a vital parameter in hydrodynamic studies. The coefficient is mainly a property of the ..."
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was to assess the potential of using LiDAR and aerial photography/photogrammetry in analysing the landscape for the estimation of the coefficient of roughness. A test site with an excellent variety of features has been established close to Nottingham, UK and DSM’s have been created from LiDAR data
Assessment of the Contribution of Surface Roughness to Airframe Noise
"... The generation of sound by turbulent boundary-layer flow at lowMach number over a rough wall is investigated by applying a theoretical model that describes the scattering of the turbulence near field into sound by roughness elements. Attention is focused on the numerical method to approximately quan ..."
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reasonable agreement with the predicted level. Estimates of the roughness noise for a Boeing 757 sized aircraft wing with idealized levels of surface roughness show that in the high-frequency region the sound radiated from surface roughness may exceed that from the trailing edge, and higher overall sound
Statistics of rough surfaces via remote sensing An experiment
, 1995
"... Abstract . The process for fabricating a random rough surface with given statistics is described . The technique consists of producing a random rough surface on plates covered with photoresist by exposing the plates to speckle patterns . The theory presented by Alvarez-Borrego is compared with expe ..."
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, was presented by Alvarez-Borrego [1] . Attention is focused on the statistics of surface height to estimate its standard deviation or variance . The motivation for this work is the application of this nonlinear technique for obtaining statistical information from a real sea surface using aerial photographs
Path planning for a mobile robot in a rough terrain environment
- In Third International Workshop on Robot Motion and Control
, 2002
"... The robust control of a mobile robot in a rough terrain environment is a challenging endeavour, since any reliance on favourable surface or environmental conditions will inevitably lead to task failure. This paper presents the preliminary development of a unified navigation system used to control a ..."
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Cited by 8 (3 self)
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The robust control of a mobile robot in a rough terrain environment is a challenging endeavour, since any reliance on favourable surface or environmental conditions will inevitably lead to task failure. This paper presents the preliminary development of a unified navigation system used to control a
Surveys of belugas and narwhals in the Canadian High Arctic in 1996
"... *This paper was completed after the death of the senior author. The authors have tried to remain true to Stuart’s directions but can not anticipate how he might have brought it to conclusion himself. In this and many other aspects of our lives, Stuart is missed. **Author to whom correspondence shoul ..."
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Cited by 1 (0 self)
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should be addressed. The summer range of belugas (Delphinapterus leucas) and narwhals (Monodon monoceros) in Prince Regent Inlet, Barrow Strait and Peel Sound in the Canadian High Arctic was surveyed from 31 July to 3 August 1996 with a visual aerial survey of offshore areas and photographic aerial
Soot in the arctic snowpack—a cause for perturbations in radiative-transfer. Atmos. Environ
, 1985
"... Climate models indicate that the reduction of surface albedo caused by black-carbon contamination of snow contributes to global warming and near-worldwide melting of ice 1,2 . In this study, we generated and characterized pure and black-carbonladen snow in the laboratory and verified that black- ..."
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The spectrally weighted albedo of snow over the full solar spectrum, α, was calculated from spectrally resolved snow albedo, α(λ), and solar spectral irradiance, i(λ) with a 5-nm resolution (dλ) (ref. More than ∼99% of the surface solar flux is contained in the spectral region between 300 and 2,500 nm. Although
Results 11 - 20
of
549
