Results 81 to 90 of about 6,224 (227)

Physical and Ecological Forcings Drive the Particle Dynamics and Enhanced Carbon Export Efficiency in the Tropical Marginal Sea

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Marginal seas contribute disproportionately to the ocean carbon cycle but remain poorly constrained due to strong spatial and seasonal variability. Here, we combine newly collected in situ particle imagery with machine learning to reconstruct monthly, depth‐resolved climatologies of particle biovolume and size distribution in the South China ...
Zengchao Xu, Yibin Huang, Feipeng Xu, Yichong Wang, Wenxin Fan, Weinan Li, Jixin Chen, Xin Liu, Bangqin Huang   +8 more
wiley   +1 more source

Behaviour of pre-stressed high strength concrete sleepers subjected to dynamic loads [PDF]

, 2015
As part of ballasted railway track, pre-stressed concrete sleepers (PCSs) play an essential role in track response, performance and safety. PCSs are subjected to dynamic loads which are often high magnitude and low duration.
Javad, Taherinezhad, Mendis, Priyan, Ngo, Tuan, Sofi, Massoud   +3 more
core   +2 more sources

CRITICAL TEMPERATURE ON CURVED SUPERELEVATED RAILWAYS

ce/papers, Volume 9, Issue 1, Page 342-351, April 2026.
Abstract Railways are essential for the efficient transport of people and cargo, but they face increasing risks due to temperature variations. This study analyses thermal instability in continuously welded rails located on curves with superelevation.
Paulo A. G. Piloto, Manuel J. C. Minhoto, Vítor W. S. Santos, Raphael Silveira   +3 more
wiley   +1 more source

Full-scale multi-functional test platform for investigating mechanical performance of track–subgrade systems of high-speed railways

Railway Engineering Science, 2020
Motivated by the huge practical engineering demand for the fundamental understanding of mechanical characteristics of high-speed railway infrastructure, a full-scale multi-functional test platform for high-speed railway track–subgrade system is developed
Wanming Zhai, Kaiyun Wang, Zhaowei Chen, Shengyang Zhu, Chengbiao Cai, Gang Liu   +5 more
doaj   +1 more source

MODELING THE RAILWAY TRACK BALLAST BEHAVIOR WITH HYPOPLASTICITY

Journal of Mathematical Sciences
Abstract The contact problem describing a railway vehicle — road — track ballast system is under our investigation. During the motion, the rolling stock (snowpiercer) is represented by a moving localized load, the road by a Timoshenko beam, and the track bed material is rigorously modeled using 3-by-3 matrices of stress and strain ...
Erich Bauer, Victor A. Kovtunenko, Pavel Krejčí, Giselle A. Monteiro, Laetitia Paoli, Adrien Petrov   +5 more
openaire   +2 more sources

Frost Heaving in Ballast Railway Tracks

Procedia Engineering, 2017
Abstract Frost heave is a well-known phenomenon in cold regions. It may happen in the wet clayey ground during winter in seasonally frozen regions and during autumn to winter in active layers in permafrost regions. The railway track upheaval, which happens in cold regions, is generally understood as due to frost heaving in subgrade layers.
Satoshi Akagawa, Michiaki Hori, Jyun Sugawara   +2 more
openaire   +1 more source

Diatoms–copepods: An evolutionary arms race

Limnology and Oceanography, Volume 71, Issue 4, April 2026.
Abstract Diatoms and copepods are dominating and diverse groups of phytoplankton and zooplankton, respectively. Diatoms account for 25–40% of ocean primary production, and their main predators, copepods, are arguably the most abundant group of metazoans in the ocean, typically accounting for ~ 80% of zooplankton biomass.
Thomas Kiørboe, Fredrik Ryderheim
wiley   +1 more source

Impact of Ballast Fouling on Rail Tracks

Civil-Comp Proceedings, 2014
Ballast fouling is understood as major cause of track deterioration in many countries over the world. It decreases the drainage and load bearing capacity of the ballast layer. A series of large scale hydraulic conductivity tests were conducted with different proportions of fouling to access the drainage capacity of the track.
N. Tennakoon, B. Indraratna, S. Nimbalkar   +2 more
openaire   +3 more sources

Vibration of the railway track-viaduct system under moving vehicles taking into account the interaction effect [PDF]

, 2006
Vibration of the railway track-viaduct system under moving vehicles taking into account the interaction ...
Rebelo, C., Rigueiro, Constança, Silva, L. S.   +2 more
core  

REINFORCEMENT EFFECT OF GEOGRID IN THE BALLAST AND SUB- BALLAST OF THE RAILWAY TRACK

International Journal of GEOMATE, 2018
The railway transportation in Iraq is essentially irreplaceable for its significant role in economicgrowth through revenue derived from the movement of goods and raw materials and passengers between Iraqmain cities. The objective of this paper is to study the effect of geogrid reinforcement on railway tracklayersthrough the use of Abaqus program.
openaire   +1 more source