Results 101 to 110 of about 1,967 (202)
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
Rail Surface Defect Detection and Severity Analysis Using CNNs on Camera and Axle Box Acceleration Data [PDF]
Rail surface defect detection is a relevant problem in the field of data-driven railway maintenance. Artificial intelligence and neural networks (NN) for axle box acceleration (ABA) or camera data show great potential for defect detection and ...
Lähns, Alexander +4 more
core +1 more source
SensorsThe measurement of the longitudinal rail profile is relevant to the condition monitoring of the rail infrastructure. The running surface is recognizable as a shiny metallic area on top of the rail head. The detection of the running surface is crucial for
Florian Mauz +3 more
doaj +1 more source
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 +5 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
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
Research on Rail Surface Defect Detection Based on Improved CenterNet
Rail surface defect detection is vital for railway safety. Traditional methods falter with varying defect sizes and complex backgrounds, while two-stage deep learning models, though accurate, lack real-time capabilities.
Yizhou Mao +4 more
core +1 more source
Experimental and numerical studies on flow behavior of surface defects in the heavy rail rolling
, 2018 Purpose Surface defects are often present on the surface of continuous casting slabs and rolled products. A lot of surface defects of hot rolled products are inherited from initial defects on continuous casting slabs.
Qingming Chang +3 more
core +1 more source
Ultrasonic Guided Waves-Based Monitoring of Rail Head: Laboratory and Field Tests
Advances in Civil Engineering, 2010 Recent train accidents have reaffirmed the need for developing a rail defect detection system more effective than that currently used. One of the most promising techniques in rail inspection is the use of ultrasonic guided waves and noncontact probes.
Piervincenzo Rizzo +6 more
doaj +1 more source
Rail rolling contact fatigue formation and evolution with surface defects
, 2022 Surface defects can induce serious rolling contact fatigue (RCF) damage at wheel/rail interfaces and even cause fracture failure of rail material. This study aims to explore the formation mechanism of surface defects on rails, and to trace the evolution ...
QY Liu (8426502) +6 more
core +1 more source