Results 41 to 50 of about 17,801 (223)

Floer theory for the variation operator of an isolated singularity

Journal of Topology, Volume 18, Issue 4, December 2025.
Abstract The variation operator in singularity theory maps relative homology cycles to compact cycles in the Milnor fiber using the monodromy. We construct its symplectic analog for an isolated singularity. We define the monodromy Lagrangian Floer cohomology, which provides categorifications of the standard theorems on the variation operator and the ...
Hanwool Bae, Cheol‐Hyun Cho, Dongwook Choa, Wonbo Jeong   +3 more
wiley   +1 more source

Feasibility of using Group Method of Data Handling (GMDH) approach for horizontal coordinate transformation

Geodesy and Cartography, 2020
Machine learning algorithms have emerged as a new paradigm shift in geoscience computations and applications. The present study aims to assess the suitability of Group Method of Data Handling (GMDH) in coordinate transformation.
Bernard Kumi-Boateng, Yao Yevenyo Ziggah
doaj   +1 more source

Converting NAD83 GPS heights into NAVD88 elevations with LVGEOID, a hybrid geoid height model for the Long Valley volcanic region, California [PDF]

, 2008
A GPS survey of leveling benchmarks done in Long Valley Caldera in 1999 showed that the application of the National Geodetic Survey (NGS) geoid model GEOID99 to tie GPS heights to historical leveling measurements would significantly underestimate the
BATTAGLIA, MAURIZIO, D. DZURISIN, D. P. HILL, J. LANGBEIN, J. SVARC   +4 more
core  

A continuous 500‐year sediment record of inundation by local and distant tsunamis in South‐Central Chile (40.1°S)

The Depositional Record, Volume 11, Issue 5, Page 1285-1310, November 2025.
Tsunami events over the past 500 years inundated Laguna Gemela West (Chile), leading to distinct sandy deposits in the lake record. This provides a complete perspective on tsunami inundation, including giant tsunamis, small local tsunamis and tsunamis that originated >100 km away from the site.
Jasper Moernaut, Evelien Boes, Daniel Melnick, Matías Carvajal, Markus Niederstätter, Sabine Schmidt, Diego Aedo, Mario Pino, Marc De Batist   +8 more
wiley   +1 more source

The effect of GNSS reference station number on determining crustal deformations: a case study for October 23, 2011, Mw 7.1 Van earthquake

Geomatics, Natural Hazards & Risk
This study explores the impact of the selected GNSS reference station numbers on determining horizontal and vertical coseismic deformations resulting from the October 23, 2011, Mw 7.1 Van Earthquake in Eastern Anatolia, near Van city center.
Alpay Özdemir, Uğur Doğan
doaj   +1 more source

Long-term and recent changes in sea level in the Falkland Islands [PDF]

, 2010
Mean sea level measurements made at Port Louis in the Falkland Islands in 1981-2, 1984 and 2009, together with values from the nearby permanent tide gauge at Port Stanley, have been compared to measurements made at Port Louis in 1842 by James Clark Ross.
Aarup, Aldiss, Altamimi, Archiving, Validation, and Interpretation of Satellite Oceanographic Data (AVISO), Bevis, Bindoff, Church, Clapperton, D. T. Pugh, Domingues, Douglas, Folland, Herschel, Holgate, Hughes, Hunter, Jones, Kent, Kistler, Leuliette, Mathers, Meredith, Meredith, Merrifield, P. L. Woodworth, Pavlis, Peltier, Peltier, Peltier, Peltier, Peltier, Pugh, Pugh, R. M. Bingley, Rahmstorf, Reynolds, Reynolds, Roberts, Ross, Ross, Ross, Rostami, Thompson, Webb, Woodworth, Woodworth, Woodworth, Woodworth, Wunsch, Wöppelmann, Wöppelmann   +50 more
core   +1 more source

Exploring the role of coastal structures in shaping cold‐temperate river–estuarine marsh environments

Earth Surface Processes and Landforms, Volume 50, Issue 14, November 2025.
Analysis of high‐resolution UAS models and historical data reveals that structure orientation and design strongly influence sediment dynamics in low‐energy environments. Short and perpendicular structures can enhance marsh growth, while longer or poorly integrated designs may reduce sediment supply and destabilise marshes. In the St.
Samuel Vaillancourt, Jean‐François Bernier, Sydney W. Meury, Patrick Lajeunesse, Donald Cayer   +4 more
wiley   +1 more source

Transformation of GPS measurements in the Košice hollow into the national geodetic grid [PDF]

Acta Montanistica Slovaca, 1999
The paper deals with transformation procedures observed GPS (Global Positioning System) data from the World Geodetic System WGS-84 into the national grid datum S-JTSK and Bpv. GPS measurements are realized on the geodetic network in the Košice-hollow for
Molèíková Soòa, Sedlák Vladimír, Hurčíková Viera   +2 more
doaj  

Estimation of Geopotential Value W₀ for the Geoid and Local Vertical Datum Parameters

Remote Sensing, 2023
Unification of the global vertical datum has been a key problem to be solved for geodesy over a long period, and the main challenge for unifying the global vertical datum system is to determine the geopotential value W0 of the geoid and to calculate the ...
Xinyu Liu, Shanshan Li, Jiajia Yuan, Diao Fan, Xuli Tan   +4 more
doaj   +1 more source

Development of a computer software for the monitoring of subsidence [PDF]

, 2004
A computer software has been developed at the Faculty of Geoinformation Science and Engineering, UTM for the purpose of detecting subsidence of ground surface or manmade structure by using Visual Basic 6.0 and FORTRAN computer languages.
Othman, Rusli, Setan, Halim
core