Results 211 to 220 of about 19,223 (223)

Comment on Sjöberg (2006) “The topographic bias by analytical continuation in physical geodesy” J Geod 81(5):345–350

Journal of Geodesy, 2007
The analytical, or harmonic, downward continuation of the external gravity potential into the topographic masses gives rise to a bias, which is called the analytical (downward) continuation (ADC) bias (Agren in J Geod 78:314–332, 2004a) or the topographic bias (Sjoberg in J Geod, 2006).
Martin Vermeer
exaly   +2 more sources

Answers to the comments by M. Vermeer on L. E. Sjöberg (2007) “The topographic bias by analytical continuation in physical geodesy” J Geod 81:345–350

Journal of Geodesy, 2007
Answers to the comments by M. Vermeer on L. E.
Lars E Sjoberg, Sjoberg Lars E
exaly   +2 more sources

A note on the topographic bias of a right circular cylinder and a cone

Journal of Geodesy, 2023
Yan Ming Wang, Wang Yan Ming
exaly   +2 more sources

Evaluation and Intercomparison of Topographic Correction Methods Based on Landsat Images and Simulated Data

Remote Sensing, 2021
Topographic effects in medium and high spatial resolution remote sensing images greatly limit the application of quantitative parameter retrieval and analysis in mountainous areas.
Tao He, Ainong Li, Li Ainong
exaly   +2 more sources

A Mysterious Topographic Bias: No Magnetic Effects on Chick Embryo Alignment?

Annales Zoologici Fennici, 2016
Many vertebrates have been shown to sense magnetic fields and align, in certain situations, their body axis along magnetic field lines. In an attempt to replicate earlier studies on magnetic alignment of chick embryos we incubated White Leghorn chicken eggs for three days and analyzed the embryo alignment axis in relation to topographic north and ...
Lukas Landler, Paul B. Siegel
openaire   +1 more source

The orientation bias of LGN neurons shows topographic relation to area centralis in the cat retina

Experimental Brain Research, 1986
The orientation sensitivity of LGN cells to flickering square-wave gratings was measured in urethane-anaesthetized paralyzed cats. The mean ratio of the amplitude of peak responses to optimally oriented gratings to that elicited by gratings of the least effective orientation was 3.0 +/- 0.3 (S.E.).
T, Shou, D, Ruan, Y, Zhou
openaire   +2 more sources

Topographical limitations to the metallization of very large scale integrated structures by bias sputtering: Experiments and computer simulations

Journal of Vacuum Science & Technology B: Microelectronics Processing and Phenomena, 1986
Aluminum deposition by radio-frequency bias sputtering on grooves and holes with aspect ratios (depth to width) in the range of 0.5–1.0 was studied experimentally and by computer simulation. The structures with an aspect ratio of up to 0.5 were planarized. Aspect ratios larger than about 0.6 however led to the buildup of cavities within the grooves and
H. P. Bader, M. A. Lardon
openaire   +1 more source

Opiate Aromatic Pharmacophore Structure−Activity Relationships in CTAP Analogues Determined by Topographical Bias, Two-Dimensional NMR, and Biological Activity Assays

Journal of Medicinal Chemistry, 2000
Topographically constrained analogues of the highly mu-opioid-receptor-selective antagonist CTAP (H-D-Phe-c[Cys-Tyr-D-Trp-Arg-Thr-Pen]-Thr-NH(2), 1) were prepared by solid-phase peptide synthesis. Replacement of the D-Phe residue with conformationally biased beta-methyl derivatives of phenylalanine or tryptophan (2R,3R; 2R,3S; 2S,3R; 2S,3S) yielded ...
G G, Bonner, P, Davis, D, Stropova, S, Edsall, H I, Yamamura, F, Porreca, V J, Hruby   +6 more
openaire   +2 more sources

Bias in topographic thresholds for gully heads

2013
The topographic threshold for overland flow gully head should be re-examined because of the effect of a basic assumption in deriving the threshold equation. The assumption that the gully head catchment (GHC) area is a synonym for runoff brings in several problems. These cause errors when calculating the threshold equation parameters (i.e.
ROSSI M. (1, 2), TORRI D. (1), SANTI E. (1)   +3 more
openaire   +1 more source

A numerical test of the topographic bias. Journal of Geodetic Science

In 1962 A. Bjerhammar introduced the methodof analytical continuation in physical geodesy, implyingthat surface gravity anomalies are downward continuedinto the topographic masses down to an internal sphere(the Bjerhammar sphere). The method also includes ana-lytical upward continuation of the potential to the surfaceof the Earth to obtain the ...
Shafiei Joud, Mehdi, Sjöberg, Lars Erik
openaire   +1 more source