Results 151 to 160 of about 73,425 (293)

Temperature field characteristics of slab ends of double-block ballastless track in large daily temperature difference region

Case Studies in Thermal Engineering
In regions with large daily temperature differences, double-block ballastless tracks have experienced severe interface damage and warping deformation at the slab ends.
Youxin Wei, Yu Liu, Bin Yang, Shiping Zhang, Yanxi Zhao   +4 more
doaj   +1 more source

Slab track optimisation considering dynamic train–track interaction

, 2021
Slab track is a type of railway track that is frequently used e.g. in high-speed applications as an alternative to ballasted track. Slab track is also well suited on bridges and in tunnels since no ballast is required and the cross-section of tunnels can be reduced. Slab tracks generally have lower maintenance demands than ballasted track.
openaire   +1 more source

Insights From the Alphasat Aldo Paraboni Experiment at Tito Scalo and Spino d'Adda: Characterizing Scintillation and Rain Attenuation at Ka‐ and Q‐Band Frequencies

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT We present experimental results on the relationship between rain attenuation and simultaneous scintillation during rain events, based on beacon signal measurements at 19.7 (Ka‐band) and 39.4 GHz (Q‐band) from the geosynchronous Alphasat satellite (25° E), received at two Italian ground stations, Spino d'Adda (42.1° slant path) and Tito Scalo ...
Miles Turner, Alef Comisso, Carlo Riva, Lorenzo Luini, Giuseppe Codispoti, Giorgia Parca   +5 more
wiley   +1 more source

The Hidden Costs of Coffee Production in the Eastern African Value Chains

Sustainable Development, EarlyView.
ABSTRACT There is increasing recognition that significant hidden costs associated with agrifood systems are not reflected in market prices. Coffee is among the three most traded agricultural commodities in the world and supports the livelihoods of more than 30 million smallholder households.
Annet Adong, Lukas Kornher, Bezawit Beyene Chichaibelu, Aslihan Arslan   +3 more
wiley   +1 more source

Influence of Rail Welds in Steel Spring Floating Slab Track on the Wheel-Rail Dynamic Response

Chengshi guidao jiaotong yanjiu
ObjectiveRail joint welds can adversely affect vehicles and tracks, necessitating research into the influence of rail welds on the wheel-rail dynamic response of floating slab tracks.
Anyang WANG, Xia LI, Hu TANG, Anbin WANG
doaj   +1 more source

A Microwell Array Embedded Microfluidic Gradient Platform for Drug Screening on Tumor Spheroids

Small, EarlyView.
A microfluidic gradient platform embedded with high‐density microwell arrays (MEG platform) enables high‐throughput generation of uniform tumor spheroids for gradient‐based drug response assessment under dynamic perfusion. As a proof of concept, monoculture breast cancer cell (MCF‐7) spheroids and MCF‐7/human dermal fibroblast (HDF) co‐culture ...
Ling Liu, Guoying Wang, Ming Li
wiley   +1 more source

Cryo‐FIB Lift‐Out and Electron Tomography Workflow for Bacteria–Nanopillar Interface Imaging Under Native Conditions: Investigating Dragonfly Inspired Bactericidal Titanium Surfaces

Small Methods, EarlyView.
A correlative cryo‐microscopy workflow enables targeted extraction and cryo‐electron tomography of bacteria–nanopillar interfaces under fully hydrated, near‐native conditions. By overcoming limitations of conventional imaging, this approach allows direct structural interrogation of bacteria–nanostructure interactions in situ, providing a methodological
Chaturanga D. Bandara, Dominik Pinkas, Martina Zanova, Martin Uher, Judith Mantell, Bo Su, Angela H. Nobbs, Paul Verkade   +7 more
wiley   +1 more source

Near‐Atomic Investigation on the Elemental Redistribution During Coprecipitation of Nano‐Sized Kappa‐Type and B2 Precipitates in an Al‐Alloyed Lightweight Steel

steel research international, EarlyView.
Elemental redistribution during coprecipitation of kappa (κ)‐type and B2 precipitates in an Al‐alloyed lightweight steel is revealed by atom probe tomography (APT) and density functional theory (DFT). Fe and Ni redistribution promotes the evolution of B2 phase from NiAl‐type toward FeAl‐type and improves the stability of κ and B2 phases during ...
Bowen Zou, Yixu Wang, Xiao Shen, Philipp Krooß, Thomas Niendorf, Richard Dronskowski, Wenwen Song   +6 more
wiley   +1 more source

Computer Modeling of the Ferrite‐To‐Austenite Transformation in a Super‐Duplex Stainless Steel and the Important Role of Trans‐Interface Diffusion

steel research international, EarlyView.
An accurate moving boundary model for volume diffusion containing boundary conditions from trans‐interface diffusion (TID) simulates the austenite growth during cooling. TID of Cr, Mo, N and Ni enhance growth kinetics. Without TID, compositions of the interface region change, decreasing the driving force for growth and finally causing numerical ...
A. Salwén, T. Müller, S. Nouhi, J. Y. Jonsson   +3 more
wiley   +1 more source

Modelling the acoustic performance of slab tracks

, 2020
Transport is a major contributor to anthropogenic greenhouse gas emissions. Railway transport has a small footprint compared to other means of transport. This is one reason for the construction of new high-speed railway lines world-wide. These lines are often constructed using slab track technology, in which the traditional track configuration of ...
openaire   +1 more source