Results 91 to 100 of about 1,151 (212)

A UAV-Based Visual Inspection Method for Rail Surface Defects

Applied Sciences, 2018
Rail surface defects seriously affect the safety of railway systems. At present, human inspection and rail vehicle inspection are the main approaches for the detection of rail surface defects.
Yunpeng Wu, Yong Qin, Zhipeng Wang, Limin Jia   +3 more
doaj   +1 more source

Multi‐Dimensional Conductive Nanocomposites for Flexible Electronics

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 4, July 2026.
Multi‐dimensional conductive nanocomposites integrate 0D, 1D, and 2D nanomaterials through spatial structure regulation and interface engineering, achieving “1 + 1 > 2” synergistic effects. By leveraging 0D filling to reduce contact resistance, 1D bridging to construct continuous conductive paths, and 2D supporting to enhance mechanical stability ...
Tianyu Wang, Ruimin Cai, Abbas Ali, Lizhe Li, Li Yang, Hulin Zhang, Xuge Fan, Yumin Xia, Wenyong Lai, Linmao Qian, Tiehu Li, Guosheng Shao, Liang Tian   +12 more
wiley   +1 more source

Countdown: Timespaces of Deadlines and Displacement

Population, Space and Place, Volume 32, Issue 5, July 2026.
ABSTRACT This article examines how politically structured deadlines and their accompanying countdowns generate dynamics of displacement by shaping anticipations of violence and prompting accelerated migration. Drawing on ethnographic research on Burundi's 2015 third‐term crisis and The Gambia's 2017 electoral impasse, we show how constitutional ...
Tone Sommerfelt, Simon Turner
wiley   +1 more source

Rail Defect Detection Using Fiber Optic Sensors and Wavelet Algorithms

, 2018
Early detection of rail defects can avoid derailments and costly damage to the train and railway infrastructure. Small breaks, cracks or corrugations on the rail can quickly propagate after only a few train cars have passed over it, creating a potential ...
Vahid Sotoudeh, Saied Taheri, Behzad Moslehi, Brad M. Hopkins   +3 more
core   +1 more source

Comparing the In‐Plane Shear Behavior of Glass Fiber‐Reinforced and Carbon Fiber‐Reinforced Polymer Laminates With the Same Epoxy Matrix System in ±45° Tensile Tests

Polymer Composites, Volume 47, Issue 12, Page 11051-11068, 20 June 2026.
Schematic illustration of ±45° tensile testing, including detection of first‐ply failure (FPF) by optical crack detection and acoustic emission monitoring, comparison of FPF values with ASTM D3518 and D3039 criteria, and resulting ply level stress states at FPF for GF‐ and CF‐epoxy laminates.
Maria Gfrerrer, Vasco D. C. Pires, Andreas J. Brunner, Clara Schuecker, Gerald Pinter   +4 more
wiley   +1 more source

A Wavelet-Based Rail Surface Defect Prediction and Detection Algorithm

, 2012
Early detection of rail defects is necessary for preventing derailments and costly damage to the train and railway infrastructure. A rail surface flaw can quickly propagate from a small fracture to a broken rail after only a few train cars have passed ...
Hopkins, Brad Michael
core  

Active Stiffness Modulation of Flexible PDMS Elastomer by Embedding Shape Memory Alloy Wires: Fabrication and Modeling

FlexTech, Volume 2, Issue 1, Page 14-22, June 2026.
Active stiffness modulation is achieved in NiTi shape memory alloy‐reinforced PDMS and carbon fiber‐epoxy composites, with reversible 3‐fold modulus increase via Joule heating and validated predictive models, which resolves longstanding adaptive design challenges.
Xi Yi, Dongjie Jiang
wiley   +1 more source

Integrating simultaneous interfacial shear rheology with neutron reflectometry for structural and dynamic analysis of fluid interfacial systems

Journal of Applied Crystallography, Volume 59, Issue 3, Page 751-764, June 2026.
We present a new setup at the FIGARO horizontal neutron reflectometer enabling simultaneous measurement of the structural and mechanical properties of liquid interfaces, combining neutron reflectometry with interfacial shear rheology.The study of the structure and mechanical properties of complex fluid interfaces has attracted growing interest in ...
Pablo Sánchez-Puga, Javier Tajuelo, Javier Carrascosa-Tejedor, Miguel Ángel Rubio, Philipp Gutfreund, Armando Maestro   +5 more
wiley   +1 more source

Automatic inspection of wheel surface defects using a combination of laser sensors and machine vision

SICE Journal of Control, Measurement, and System Integration
The safety of railways is ensured by the regular maintenance of tracks, signals and rolling stocks. This mainly involves manual inspection by skilled maintainers and automated inspection systems are not commonly used.
Takeshi Emoto, Ankit A. Ravankar, Abhijeet Ravankar, Takanori Emaru, Yukinori Kobayashi   +4 more
doaj   +1 more source

Bridging New Divides: Ethnic Linkages and Trade in Africa

South African Journal of Economics, Volume 94, Issue 2, June 2026.
ABSTRACT This paper studies the effects of ethnic linkages on trade between countries within Africa. I construct a digitised and geo‐referenced dataset of historical ethnic territories for pre‐colonial Africa. The empirical strategy exploits the role of historical ethnic territories in shaping the current distribution of ethnic groups across countries ...
Conrad Copeland
wiley   +1 more source