Results 61 to 70 of about 8,183 (207)

IDENTIFYING CABLE DISORDERS WITH ON-VOLTAGE TIME DOMAIN REFLECTOMETRY

open access: yesAcademy Journal of Science and Engineering, 2009
In this paper a diagnostics technique is presented for localization of degraded regions along a cross-linked polyethylene (XLPE) insulated power cable.
Vincent Onotu FACHE
doaj  

Spatial behaviour of soil moisture in the root zone of the Caatinga biome

open access: yesRevista Ciência Agronômica
The purpose of this study was to represent the soil moisture in the profile corresponding to the root zone from TDR sensors in a preserved area of the Caatinga biome and analyze the spatialized moisture adjustment equations under different layers of the ...
Carlos Alexandre Gomes Costa   +4 more
doaj   +1 more source

Thermal Safety Margins and Peak Leaf Temperatures Predict Vulnerability of Diverse Plant Species to an Experimental Heatwave

open access: yesPlant, Cell &Environment, EarlyView.
ABSTRACT Extreme heat can push plants beyond their thermal safety margin (TSM) if maximum leaf temperature (Tleaf_max) exceeds leaf critical temperature (Tcrit). The TSM is potentially useful for assessing heat vulnerability across species but needs further validation, so we exposed 50 tree/shrub species in controlled glasshouses to a 6‐day heatwave ...
Diana Cox   +8 more
wiley   +1 more source

De‐Coupled Water and Nitrogen Translocation From Subsoil to Canopy of Temperate Forest Trees

open access: yesPlant, Cell &Environment, EarlyView.
ABSTRACT Water and nitrogen (N) transport from soil to canopy play a central role in tree functioning, yet direct evidence for their timing and coupling in mature forests remains scarce. We report results from a paired dual‐isotope (2H, 15N) tracer experiment in a temperate forest, comparing water and nitrate uptake patterns across tree species ...
Klara Mrak   +7 more
wiley   +1 more source

Estudo em tempo real da migração de etanol na zona vadosa em experimento de campo [PDF]

open access: yes, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia AmbientalEm casos de derramamentos com misturas de gasolina e etanol, a presença de etanol pode alterar o comportamento de ...
Schneider, Ana Cláudia
core  

Fine‐root trait variation in temperate trees follows arc‐shape pattern along deep soil profiles

open access: yesNew Phytologist, Volume 251, Issue 3, Page 1101-1115, August 2026.
Root trait variation along the soil depth profile in four temperate tree species. Summary Roots are plants' interface with the soil, controlling access to water and nutrients. Yet, fine‐root trait variation along deep soil profiles and its functional implications remain poorly understood.
Katrin Pietig   +3 more
wiley   +1 more source

Recent Advancements in Rayleigh Scattering-Based Distributed Fiber Sensors

open access: yesAdvanced Devices & Instrumentation, 2021
Recently, Rayleigh scattering-based distributed fiber sensors have been widely used for measurement of static and dynamic phenomena such as temperature change, dynamic strain, and sound waves.
Xiaoyi Bao, Yuan Wang
doaj   +1 more source

Assessing unfrozen water content using capacitance sensors in frozen soils: A new physics‐based conversion curve

open access: yesVadose Zone Journal, Volume 25, Issue 4, July/August 2026.
Abstract One of the most widely used techniques to measure the unfrozen water content of cryotic soils is to monitor their apparent dielectric permittivity. Paired with an empirical calibration equation or a dielectric mixing model, this measurement, εeff$\varepsilon _{\text{eff}}$, gives an estimate of unfrozen water content in soils.
Quentin “Quinn” Sapin, Élise Devoie
wiley   +1 more source

Measurement of antennas and microwave components using time-domain reflectometry of a voltage impulse

open access: yes, 2011
Band-pass microwave systems such as ultra-wideband antennas are traditionally characterized in the frequency-domain through a vector network analyzer in an anechoic chamber.
Jonathan Scott   +3 more
core   +1 more source

DIAGNOSING ETHERNET CABLES USING TIME DOMAIN REFLECTOMETRY IN ETHERNET CIRCUITS

open access: yes, 2023
Ethernet cables are a vital component in modern systems, providing reliable data transmission between devices. However, like any other physical component, these cables are subject to wear and tear.
Sundqvist, Anton
core   +1 more source

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