8,196 Hits in 4.7 sec

Geomorphic Evolution of Radial Sand Ridges in the South Yellow Sea Observed from Satellites

Yanyan Kang, Jinyan He, Bin Wang, Jun Lei, Zihe Wang, Xianrong Ding
2022 Remote Sensing  
Based on the multi-source remote sensing image data from 1979 to 2019, three types of geomorphic feature lines, artificial coastlines, waterlines, and sand ridge lines were extracted.  ...  As a unique geomorphological feature in the world, its evolution process and characteristics are crucial to marine resource management and ecological protection.  ...  Acknowledgments: The authors are grateful to the China Center for Resource Satellite Data and Applications (CRESDA) for supplying all the HJ−1 CCD and GF−1 images.  ... 
doi:10.3390/rs14020287 fatcat:auvhk7a3cjcxhlcq6iczcy6mby

Radial Columns in Cortical Architecture: It Is the Composition That Counts

E. G. Jones, P. Rakic
2010 Cerebral Cortex  
In this issue of Cerebral Cortex, 3 related papers provide the most comprehensive analysis to date of the cellular and synaptic relationships of a standard cortical column in the somatosensory cortex of  ...  The essence of cortical radial organization, at least for the sensory areas, is captured here.  ...  Here, the minicolumns would be extracting specific information from a vast array of potentially converging thalamic inputs.  ... 
doi:10.1093/cercor/bhq127 pmid:20667930 pmcid:PMC2936809 fatcat:z7txcptoevgsjptpxoq53gzska

Pomegranate: 2D segmentation and 3D reconstruction for fission yeast and other radially symmetric cells

Erod Keaton Baybay, Eric Esposito, Silke Hauf
2020 Scientific Reports  
to the image analysis portfolio already available for fission yeast and other radially symmetric cell types.  ...  Thus, Pomegranate accurately represents radially symmetric cells in 3D even if cell diameter varies and regardless of whether a cell is straight, bent or curved.  ...  Weidemann for generating yeast strains, A. Brock and B. Jutras for providing images of bacteria, D. Weidemann for feedback on the pipeline, J. Rogers and C.  ... 
doi:10.1038/s41598-020-73597-w pmid:33024177 fatcat:p7vumcmh55en3okszgq3y7lveu

The Optical and Vesta Projects: Ophthalmic Visualization and Virtual Surgery

Brian A. Barsky, Michael S. Downes, Frank Tendick
2001 International Journal of Virtual Reality  
Accurate and detailed information about the shape of the cornea is critical for the diagnosis and correction of vision problems.  ...  The first is our novel and superior method of calculating the shape of the cornea of the eye from measuring instuments, called videokeratographs, that typically shine a pattern (usually rings) of light  ...  However, we must change the shape of the surface globally, otherwise rays from other features will still miss their corresponding features.  ... 
doi:10.20870/ijvr.2001.5.1.2665 fatcat:pmduba6bdjcelmwt5vy4xgxviy

Snow cover thickness estimation using radial basis function networks

E. Binaghi, V. Pedoia, A. Guidali, M. Guglielmin
2013 The Cryosphere  
</strong> This paper reports an experimental study designed for the in-depth investigation of how the radial basis function network (RBFN) estimates snow cover thickness as a function of climate and topographic  ...  A comparison analysis was also developed for a quantitative evaluation of the advantages of the RBFN method over to conventional widely used spatial interpolation techniques when dealing with critical  ...  Work partially supported by the Italian MIUR project PRIN 2008 "Permafrost e piccoli ghiacciai alpini come elementi chiave della gestione delle risorse idriche in relazione al cambiamento climatico".  ... 
doi:10.5194/tc-7-841-2013 fatcat:62okovc7t5hijg2z2otpne2c7i

Regional gravity field refinement for (quasi-) geoid determination based on spherical radial basis functions in Colorado

Qing Liu, Michael Schmidt, Laura Sánchez, Martin Willberg
2020 Journal of Geodesy  
The cubic polynomial (CuP) function which has smoothing features is applied to the airborne data as a low-pass filter for filtering the high-frequency noise.  ...  This study presents a solution of the '1 cm Geoid Experiment' (Colorado Experiment) using spherical radial basis functions (SRBFs).  ...  Acknowledgements The authors would like to thank the German Research Foundation (DFG) for funding the project 'Optimally combined regional geoid models for the realization of height systems in developing  ... 
doi:10.1007/s00190-020-01431-2 fatcat:7hvcvvymjre6lpk7vr3evrbi74

A Study on the Response of the Hydrodynamic Environment to the Morphology of Radial Sand Ridges in the Coastal Waters of Jiangsu

Changjun Qi, Lejun Ma, Qinggai Wang, Yuan Zhai, Jixuan Li, Hanwen Zhang
2019 Water  
A two-dimensional hydrodynamic model for the waters off the coast of Jiangsu, where there are radial sand ridges (RSRs) (hereinafter, the RSR area), was established based on measured topographic, tide  ...  Considering the complex topographic and geomorphic characteristics of the RSR group in this area, an unstructured grid was used for the calculation.  ...  One view states that the radial tidal current field shapes the RSRs.  ... 
doi:10.3390/w11102190 fatcat:kmvxm7u6f5fydkldir3jvxegxa

The Radial Topology Algorithm—A New Approach for Deriving 2.5D GIS Data Models

Ulrich Lenk, Christian Heipke
2006 Geoinformatica  
In this paper a new method for the combination of 2D GIS vector data and 2.5D DTM represented by triangulated irregular networks (TIN) to derive integrated triangular 2.5D object-based landscape models  ...  The new algorithm is called radial topology algorithm. We discuss its advantages and limitations, and describe ways to eliminate redundant nodes generated during the integration process.  ...  Acknowledgements This research was funded by a grant of the German Federal Environmental Foundation, Osnabrück, Germany.  ... 
doi:10.1007/s10707-006-0342-8 fatcat:lqagzzxd6batjfeasswyjlstne

The North Greenland Project

N Henriksen, A.K Higgins
1991 Grønlands Geologiske Undersøgelse Bulletin  
A summary of the many papers and maps resulting from the project is given here.  ...  A complementary 1:500 000 mapping programme was initiated in 1964 with the aim of establishing a general geological overview of the entire ice-free part of Greenland within the foreseeable future.  ...  Dueholm (as noted above), aimed particularly at the coordination of topographical and geological mapping, and the development of methods for increased extraction of geological information from aerial photographs  ... 
doi:10.34194/bullggu.v160.6711 fatcat:uct4gbjagvbzhlridrvmndymu4

Fabrication of transparent hemispherical 3D nanofibrous scaffolds with radially aligned patterns via a novel electrospinning method

Jeong In Kim, Ju Yeon Kim, Chan Hee Park
2018 Scientific Reports  
Human organs and tissue have three-dimensional (3D) morphologies; for example, the morphology of the eye is a spherical shape.  ...  We proposed a novel electrospinning method using a single nonconductive hemispherical device and a metal pin.  ...  Acknowledgements This research was supported by grant from the Basic Science Research Program through the National Research Foundation of Korea (NRF) by Ministry of Education, Science and Technology (Project  ... 
doi:10.1038/s41598-018-21618-0 pmid:29467436 pmcid:PMC5821851 fatcat:6eml3jybtfffnnn3ew2z76uhoq

Collapse susceptibility assessment using a support vector machine compared with back-propagation and radial basis function neural networks

Yuanyao Li, Yifan Sheng, Bo Chai, Wei Zhang, Taili Zhang, Jiajia Wang
2020 Geomatics, Natural Hazards & Risk  
The 3S technology-based backpropagation neural network (BPNN) and radial basis function neural network (RBFNN) models are also proposed for comparison.  ...  This paper proposes a 3S (RS, GPS and GIS) technologybased support vector machine (SVM) to map collapse susceptibility in the Nantian area of China.  ...  Topographic factors The topographic factors are mainly extracted from the GDEM with a spatial resolution of 30 m, including elevation, slope, relief amplitude, plan curvature, profile curvature and slope  ... 
doi:10.1080/19475705.2020.1734101 fatcat:veth6ulflra2vjn7ystxnykqqe

Neural correlates of radial frequency trajectory perception in the human brain

D. J. Gorbet, F. Wilkinson, H. R. Wilson
2014 Journal of Vision  
Radial frequency (RF) motion trajectories are visual stimuli that consist of a difference of Gaussians moving along a closed trajectory defined by a sinusoidal variation of the radius relative to a circular  ...  Wholebrain analyses show that RF motion trajectories also evoke premotor and posterior parietal cortical activity that may be a neural correlate of shape recognizability.  ...  Address: Centre for Vision Research, York University, Toronto, ON, Canada.  ... 
doi:10.1167/14.1.11 pmid:24413394 fatcat:xciulrh6evgync3snrjuxwqdhi

Digital camera calibration for cultural heritage documentation: the case study of a mass digitization project of religious monuments in Cyprus

Evagoras Evagorou, Christodoulos Mettas, Athos Agapiou, Kyriacos Themistocleous, Spyridon Papavasileiou, Diofantos Hadjimitsis
2020 European Journal of Remote Sensing  
For the calibration procedure, 3D texture models were built with the Agisoft commercial software based on: (a) the aforementioned calibration parameters and (b) the self-calibration process.  ...  y0), radial distortion coefficients (K1, K2, K3), tangential distortion coefficients (P1, P2) and the affinity and the shear terms (b1, b2) were estimated.  ...  Acknowledgments This research is supported by the project entitled: "Ecclesiastical Cultural Heritage Digitization Pilots for the Churches of Cyprus and Crete" referred to as "Digital Aposphragisma (Imprint  ... 
doi:10.1080/22797254.2020.1810131 fatcat:qd66mzraqjgsjl27mfykbphxdy

Tharsis-radial graben systems as the surface manifestation of plume-related dike intrusion complexes: Models and implications

Lionel Wilson
2002 Journal of Geophysical Research  
1] Several zones of graben (Memnonia, Sirenum, Icaria, Thaumasia, and Claritas Fossae) extend radially away from the Tharsis rise in the southern hemisphere of Mars for distances of up to 3000-4000 km.  ...  Eruptions from giant dikes would be more likely to occur in regions where the crust was thinner, such as the northern lowlands, providing a potential mechanism for emplacement of recently documented Early  ...  Webb for productive discussions, and to Eric Grosfils and Richard Ernst for very helpful reviews.  ... 
doi:10.1029/2001je001593 fatcat:je6ppny4tbayvnuuxkyrtbyxue

Automatic identification and characterization of radial files in light microscopy images of wood

Guilhem Brunel, Philippe Borianne, Gérard Subsol, Marc Jaeger, Yves Caraglio
2014 Annals of Botany  
This study reports on a new method for the automatic detection and characterization of cell files in wood images obtained by light microscopy.  ...  The results are accompanied by a reliability indicator that can highlight specific configurations of cells and also potentially erroneous data. † Conclusions The method provides a fast, economical and  ...  Additionally, a big thank you to François Pailler and Merlin Ramel for their patience and help in preparing the different samples and optimizing technical protocols.  ... 
doi:10.1093/aob/mcu119 pmid:24989783 pmcid:PMC4156126 fatcat:cbdohmo3dzetnomjkbhiakxnaq
« Previous Showing results 1 — 15 out of 8,196 results