Results 61 to 70 of about 36,199 (290)
The study of coal tectonic disturbance using multifractal analysis of coal specimen images obtained by means of scanning electron microscopy [PDF]
E3S Web of Conferences, 2019 The possibility of using a multifractal approach to study the tectonic disturbance of coals has been investigated. The relationship between the coal disturbance and the asymmetry of fractal spectra of coal images obtained by means of scanning electron ...
Malinnikova Olga +3 more
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International Journal of Climatology, EarlyView.Unique characteristics of winter daily minimum (Tmin) and maximum (Tmax) temperatures and freeze days across the conterminous United States from 1952 to 2024 are examined. Results show spatial heterogeneity in Tmin/Tmax warming rates across the tropical‐temperate transition zone in the southeastern United States, and that the highest temperature on the
Vincent M. Brown +4 more
wiley +1 more source
The naturalness index for the identification of natural areas on regional scale
International Journal of Applied Earth Observations and Geoinformation, 2021 Researchers have been trying to measure the influence of humankind on our environment for several decades. Among the technical solutions for this goal, approaches for a rule-based fusion of different geospatial information layers have reached the ...
Burak Ekim +3 more
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Limnology and Oceanography: Methods, EarlyView.Abstract Understanding a population's distribution depends on observing the presence and movement of individuals throughout their range. For highly mobile marine species, these observations typically rely on high effort monitoring programs. Tracking enough individuals to understand trends in movement behavior is not always logistically feasible, and ...
Abigail M. Kreuser +3 more
wiley +1 more source
Refining techniques for high‐frequency monitoring of chlorophyll a fluorescence in estuarine systems
Limnology and Oceanography: Methods, EarlyView.Abstract Concentrations of the photosynthetic pigment chlorophyll a are commonly used as a proxy for phytoplankton biomass in aquatic systems. Traditional methods for extracting chlorophyll a in discrete samples limit measurement frequency, while in situ sensor technology provides high frequency chlorophyll a fluorescence measurements at a more ...
Nicole Dix +10 more
wiley +1 more source
Geodesy and Cartography, 2020 In the context of processing GNSS (Global Navigation Satellite System) data, it is known that the estimation of the ionospheric delays decreases the strength of the observation model and makes significant the time required to fix the ambiguities namely ...
Noureddine Kheloufi, Abdelhalim Niati
doaj +1 more source
Movement Disorders, EarlyView.Abstract Background Neuroinflammation, measured using [11C](R)‐PK11195 positron emission tomography (PET), has been reported in isolated rapid‐eye‐movement sleep behavior disorder (iRBD), but its temporal progression is unknown. Objective The aim was to assess longitudinal progression of neuroinflammation in iRBD patients and its relationship with ...
Andreas Myhre Baun +17 more
wiley +1 more source
Position determination of the Chang’e 3 lander with geodetic VLBI
Earth, Planets and Space, 2019 We present results from the analysis of observations of the Chang’e 3 lander using geodetic Very Long Baseline Interferometry. The applied processing strategy as well as the limiting factors to our approach is discussed.
Grzegorz Klopotek +9 more
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Study on the Preliminary Design of ARGO-M Operation System [PDF]
Journal of Astronomy and Space Sciences, 2010 Korea Astronomy and Space Science Institute has been developing one mobile satellite laser ranging system named as accurate ranging system for geodetic observation-mobile (ARGO-M). Preliminary design of ARGO-M operation system (AOS) which is one of the
Yoon-Kyung Seo +6 more
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Mathematical Methods in the Applied Sciences, Volume 48, Issue 6, Page 6912-6917, April 2025.ABSTRACT Nowadays, a substantial portion of investigations concerning the symmetry analysis of differential equations predominantly adhere to a framework comprising the following key procedures: (i) the derivation of symmetries, (ii) the determination of an optimal system, (iii) the utilization of these symmetries to construct invariants or ...
A. Paliathanasis +2 more
wiley +1 more source