Results 81 to 90 of about 8,183 (207)

Embodied Intelligence for Soil Health toward Sustainable Smart Agriculture: Sensing the Soil with Flexible Geotextiles Sensors

Global Challenges, Volume 10, Issue 6, June 2026.
This review examines the transition from rigid to flexible soil sensing technologies in the context of soil as a dynamic and heterogeneous environment. By integrating sensor types, sensing modalities, materials, fabrication and deployment strategies, and IoT‐enabled energy and communication approaches, it highlights geotextiles as scalable sensing ...
Ayse Feyza Yilmaz, Meltem Tekcin, Burak Kilic, Erdem Bahadir, Fatima Iqbal, Ahad Khabbaz Bavil, Batuhan Atasoy, Senem Kursun   +7 more
wiley   +1 more source

Polarisation measurements on monomode fibres using optical time-domain reflectometry [PDF]

, 1981
The feasibility of polarisation optical time-domain reflectometry in single-mode fibres is demonstrated. Polarisation analysis of the backscattered light clearly shows the evolution of the state of polarisation in the fibre.
D.N. Payne, Conduit, A.J., Hartog, A.H., A.J. Conduit, A.H. Hartog, Payne, D.N.   +5 more
core   +1 more source

Evaluation of the WET sensor compared to time domain reflectometry

, 2006
This paper concentrates on the experimental calibration of a rapid, non-destructive sensor to investigate the salinization process by measuring the dielectric properties of the soil to estimate both the soil water content (theta) and pore water ...
Persson, Magnus, Hamed Abd El Mageed, Yasser, Samy, Ghada   +2 more
core   +2 more sources

A FDR Sensor for Measuring Complex Soil Dielectric Permittivity in the 10–500 MHz Frequency Range

Sensors, 2010
Mechanical details as well as electrical models of FDR (frequency domain reflectometry) sensors for the measurement of the complex dielectric permittivity of porous materials are presented.
Wojciech Skierucha, Andrzej Wilczek
doaj   +1 more source

A New Insight on the "S" Shape Pattern of Soft Faults in Time-Domain Reflectometry. [PDF]

Sensors (Basel), 2023
Loete F.
europepmc   +1 more source

High Fidelity Security Mesh Monitoring using Low-Cost, Embedded Time Domain Reflectometry

Transactions on Cryptographic Hardware and Embedded Systems
Security Meshes are patterns of sensing traces covering an area that are used in Hardware Security Modules (HSMs) and other systems to detect attempts to physically intrude into the device’s protective shell.
Jan Sebastian Götte, Björn Scheuermann
doaj   +1 more source

Polarisation optical time domain reflectometry

Electronics Letters, 1980
A proposed new optical fibre technique will allow measurement of the spatial distribution of physical fields, and will also allow location of anomalous features in single polarisation state monomode optical fibres such as are under discussion for very high bandwidth communication.
openaire   +1 more source

Status and analysis of multi-factor intelligent perception of hidden disaster in mines based on DOFS

Meitan kexue jishu
Coal is the “ballast stone” for China’s energy security, but hidden disaster-causing factors and the “three highs and one low” problems in deep underground environments pose threats to the safe, efficient and green mining of coal mines.
Weipeng SHI, Pingsong ZHANG, Binyang SUN, Guangqing WEI   +3 more
doaj   +1 more source

Synthesis of Nondestructive Testing Technologies for Geomaterial Applications, May 2005

, 2005
Current monitoring techniques for determination of compaction of earthwork and asphalt generally involve destructive testing of the materials following placement.

core  

Broadband Reflectometry: Theoretical Background

, 2011
In this chapter, the basic approaches of broadband microwave reflectometry are described in detail. More specifically, time domain reflectometry (TDR) and frequency domain reflectometry (FDR) are presented and the involved instrumentation is fully ...
DE BENEDETTO, EGIDIO, CANNAZZA, GIUSEPPE, Egidio De Benedetto, CATALDO, Andrea Maria, Giuseppe Cannazza, Andrea Cataldo   +5 more
core   +1 more source