Results 51 to 60 of about 635 (134)

Retrospective Mapping of Global Snow and Ice Cover Beyond the Satellite Observational Era

open access: yesEarth and Space Science, Volume 12, Issue 5, May 2025.
Abstract Monitoring Earth's snow and ice cover is essential for diverse applications, including climate studies, hydrological forecasting, and precipitation mapping. This study develops and evaluates methodologies to extend the Global Multisensor Automated Snow and Ice Mapping System (GMASI) records prior to its July 1987 inception, reconstructing high‐
Kingsley K. Kumah   +2 more
wiley   +1 more source

A class of quadrature formulas and related Marcinkiewicz-Zygmund inequalities(一类求积公式及相关Marcinkiewicz-Zygmund不等式)

open access: yesZhejiang Daxue xuebao. Lixue ban
In this paper, we establish the Simpson quadrature formula for continuous periodic functions and investigate its quadrature accuracy for trigonometric polynomials, that is, when the quadrature formula holds exactly.
王丹丹(WANG Dandan), 赵易(ZHAO Yi)
doaj   +1 more source

Marshall's Ignorant Hand

open access: yes
Milton Quarterly, Volume 59, Issue 3, Page 128-138, October 2025.
Tomos Evans
wiley   +1 more source

A Deterministic Model of the Gamma Radiation at the Soil Surface–Including Soil Moisture Correction for Better Radiation Data Exploitation in Soil Mapping

open access: yesJournal of Plant Nutrition and Soil Science, Volume 188, Issue 2, Page 299-311, April 2025.
ABSTRACT Background During the last decades, gamma spectrometry data have increasingly been used in soil science, for example, for mapping. However, the full data potential could not be exploited due to certain constraints, among which the insufficient representation of attenuating materials (in particular, water) in correction algorithms is the most ...
Ludger Herrmann, Georg Zimmermann
wiley   +1 more source

A Regularization Method to Solve a Cauchy Problem for the Two-Dimensional Modified Helmholtz Equation

open access: yesMathematics, 2019
In this paper, the ill-posed problem of the two-dimensional modified Helmholtz equation is investigated in a strip domain. For obtaining a stable numerical approximation solution, a mollification regularization method with the de la Vallée Poussin ...
Shangqin He, Xiufang Feng
doaj   +1 more source

Insights From Homeowners on the Impact of Flood Risk Communication on Adaptive Behavior at the Property Level From the 2021 Flood Event in Germany

open access: yesJournal of Flood Risk Management, Volume 18, Issue 1, March 2025.
ABSTRACT The study provides insights into the impact of risk communication on adaptation behavior before and after the 2021 flood in western Germany. The aim is to ascertain how the flood influenced homeowners' adaptive behavior. The Protection Motivation Theory is employed to identify the factors that influence adaptive behavior and needs in response ...
Helene Meyer, Georg Johann
wiley   +1 more source

Some opial, Lyapunov, and De IaValée poussin inequalities with nonhomogeneous boundary conditions

open access: yesJournal of Inequalities and Applications, 2000
We derive Opial-type inequalities for a class of real functions satisfying nonhomogenous boundary conditions and determine the best constant and extremals.
Fink AM, Hinton Don B, Brown Richard C
doaj  

Almost Conservative Four-Dimensional Matrices through de la Vallée-Poussin Mean

open access: yesAbstract and Applied Analysis, 2014
The purpose of this paper is to generalize the concept of almost convergence for double sequence through the notion of de la Vallée-Poussin mean for double sequences.
S. A. Mohiuddine, Abdullah Alotaibi
doaj   +1 more source

Nicolas Poussin’s Realm of Flora: The Botanical Renaissance and the Mysteries of the Flower, Sign, Circle and Ellipse

open access: yesArts
In spite of the preeminence of Nicolas Poussin as one of the great classicist painters in seventeenth century France, some of his earlier work has not received the attention it deserves. This article turns to his Realm of Flora (c.
Frederick A. De Armas
doaj   +1 more source

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