Results 181 to 190 of about 20,782 (211)

Geomorphic Effectiveness of an Extreme Flood in a Mountain River: Evidence From Pre‐ and Post‐Event Surveys in a Subtropical Region of Southern Brazil

Hydrological Processes, Volume 40, Issue 5, May 2026.
The extreme flooding of April 2024 caused a complete “geomorphic reset”, resulting in a 24% widening of the channel and a transition to critical or supercritical flow regimes. The energy of the event broke through the stable armouring layer, reducing the armouring ratio from 7.9 to 4.9 and intensely removing fine sediments from the subsurface.
Gabriel Augusto Feyh, Jean Paolo Gomes Minella, Eno Darci Saatkamp, Lidiane Buligon, Gustavo Henrique Merten, Felipe Bernardi, Cristiano Carvalho da Silva, Angelo Garcia Costa, Alice Prates Bisso Dambroz   +8 more
wiley   +1 more source

Crown Exposure Drives Sap Flow Variability Among Nearly Identical Trees in a Lowland Tropical Rainforest

Hydrological Processes, Volume 40, Issue 5, May 2026.
Contrary to expectations from upscaling in tropical forests, we found wide sap flow variability across and within individual trees of a homogeneous cohort in a tropical lowland rainforest (10 similar‐sized conspecific trees). Maximum sap flow from simultaneous readings differed up to 14‐fold between trees and averaged 52.5% within individual trees ...
Natalia de Aguiar‐Campos, Yoko F. Ishida, Will Edwards, Susan G. W. Laurance   +3 more
wiley   +1 more source

Phylogenetic Estimation of branch-specific Shifts in the Tempo of Origination

Kopperud BT, Höhna S.
europepmc   +1 more source

ON THE GENERAL QUADRATIC GAUSS SUMS WEIGHTED BY CHARACTER SUMS OVER A SHORT INTERVAL

Bulletin of the Korean Mathematical Society, 2013
Tianping Zhang
exaly   +2 more sources

The Mean Values of Character Sums and Their Applications

Mathematics, 2021
In this paper, we use the elementary methods and properties of classical Gauss sums to study the calculation problems of some mean values of character sums of special polynomials, and obtained several interesting calculation formulae for them.
Jiafan Zhang, Yuanyuan Meng
exaly   +2 more sources

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A hybird mean value involving gauss sums and character sums

Indian Journal of Pure and Applied Mathematics, 2010
Zhang Wenpeng
exaly   +2 more sources

On the fourth-order linear recurrence formula related to classical Gauss sums

Open Mathematics, 2017
Let p be an odd prime with p ≡ 1 mod 4, k be any positive integer, ψ be any fourth-order character mod p. In this paper, we use the analytic method and the properties of character sums mod p to study the computational problem of G(k, p) = τk(ψ)+τk(ψ ...
Zhang Wenpeng
exaly   +2 more sources

On the High-Power Mean of the Generalized Gauss Sums and Kloosterman Sums

Mathematics, 2019
The main aim of this paper is to use the properties of the trigonometric sums and character sums, and the number of the solutions of several symmetry congruence equations to research the computational problem of a certain sixth power mean of the ...
Wenpeng Zhang
exaly   +2 more sources