Results 61 to 70 of about 3,825 (195)

Historical data reveal extirpation of foundation species and kelp forest community deborealization in a coastal hotspot

open access: yesEcological Applications, Volume 36, Issue 3, April 2026.
Abstract Climate change is restructuring ecological communities globally, yet the impacts are often underestimated or poorly resolved due to the lack of historical baselines. In temperate oceans, biologically diverse and socioeconomically important kelp forests are the marine ecosystem most threatened by climate change.
Brian Timmer   +3 more
wiley   +1 more source

New Tools for Urban Analysis: A SLAM-Based Research in Venice

open access: yesRemote Sensing, 2022
This research proposes a detailed analysis of the potential of MMS (Mobile Mapping Systems), supported by SLAM (Simultaneous Localisation And Mapping) algorithms, performed on a multiscale test field in order to make a concrete contribution to the ...
Beatrice Tanduo   +3 more
doaj   +1 more source

HELMERT TRANSFORMATION ON THE CASE OF GAUSS-KRÜGER AND UTM

open access: yesContemporary Theory and Practice in Construction, 2019
<jats:p>Globally, maps are our primary source of comprehensive information about the shape, size and arrangement of Earth features. Maps are the only way we can get a unique and comprehensive view of the world. Unfortunately, globally, all maps are somehow deformed, affecting our perception and understanding of the ...
Dragoljub Sekulović   +2 more
openaire   +2 more sources

Spatial Demonstratives and Perspective Taking in English and Japanese

open access: yesCognitive Science, Volume 50, Issue 3, March 2026.
Abstract There is much debate regarding the extent to which languages express the same spatial parameters or whether spatial communication is essentially diverse. In this paper, we explore “perspective taking” in spatial demonstrative systems as a means of exploring between and within language variation.
Harmen B. Gudde   +2 more
wiley   +1 more source

Using the Helmert-Transformation to Reduce Dimensionality in a Mixed Model: Application to a Wage Equation with Worker and Firm Heterogeneity [PDF]

open access: yes
A model for matched data with two types of unobserved heterogeneity is considered – one related to the observation unit, the other to units to which the observation units are matched.
Nilsen, Øivind Anti   +2 more
core   +3 more sources

Reduced-Dynamic Precise Orbit Determination Based on Helmert Transformation

open access: yes, 2008
Four fundamental approaches in the Precise Satellite Orbit Determination (POD) are Dynamic POD, Reduced-Dynamic POD, Kinematic POD, and Reduced-Kinematic POD (Svehla & Rothacher, 2003, Liu et al. 2004). Generally, two kinds of information are considered: dynamic parameters and kinematic factors. In the dynamic method, the orbit precision mainly depends
Chen, J., Wang, J.
openaire   +4 more sources

Chinese Readers Process Word Class of Parafoveal Words During Sentence Reading

open access: yesCognitive Science, Volume 50, Issue 3, March 2026.
Abstract The present study aimed to investigate the parafoveal processing of word class in Chinese reading, focusing on how grammatical category consistency affects word recognition. The gaze‐contingent boundary paradigm was adopted in an eye‐tracking study. In each sentence, a parafoveal target word was replaced with three types of previews: identical
Zijun Qi, Yue Xi, Jinger Pan
wiley   +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]

open access: yes, 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   +4 more
core  

Random Triangle Theory with Geometry and Applications

open access: yes, 2015
What is the probability that a random triangle is acute? We explore this old question from a modern viewpoint, taking into account linear algebra, shape theory, numerical analysis, random matrix theory, the Hopf fibration, and much much more.
Edelman, Alan, Strang, Gilbert
core   +1 more source

Total Least Squares Spline Approximation [PDF]

open access: yes, 2019
Spline approximation, using both values yi and xi as observations, is of vital importance for engineering geodesy, e.g., for approximation of profiles measured with terrestrial laser scanners, because it enables the consideration of arbitrary dispersion ...
Ezhov, Nikolaj   +2 more
core   +1 more source

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