Results 91 to 100 of about 29,239 (203)
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Hardware released during spacecraft entry can generate hypervelocity impacts that provide unique constraints on planetary subsurface properties. During NASA's Perseverance descent, two tungsten cruise ballast mass devices (CBMD) and fragments of the cruise stage formed meter‐scale craters north‐west of Jezero crater, in one of the sinuous ...
A. J. Sokołowska +4 more
wiley +1 more source
Upgrading of vibrating compactor of the railway track ballast of VPO-3000 machine [PDF]
Transport Problems, 2012 In the course of work a new vibrating compactor with single-direction inertial forces according to the authors’ innovative license is applied. Examination of possible dependence on substantiation of the new vibrating device parameters is shown.
Sergey LEE +3 more
doaj
Fracture toughness estimation of ballast stone used in Iranian railway
Journal of Rock Mechanics and Geotechnical Engineering, 2017 Ballast is a layer composed of crushed stone basically with diameters of 20–60 mm, on which sleepers and rails are set. Ballast is used to withstand vertical, horizontal and lateral forces applied on sleepers and to hold the line in operative conditions.
I. Ferestade +2 more
doaj +1 more source
Island Invader: Rugulopteryx okamurae and the Challenge for Macaronesian Coasts
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 9, September 2026.ABSTRACT Since 2015, Rugulopteryx okamurae, a brown seaweed native to the Northwest Pacific, has become one of the most conspicuous marine invaders in the European continental coastal waters. Its recent establishment in the Macaronesian archipelagos (the Azores, Madeira and Canary Islands) has produced significant ecological changes, including ...
Rodrigo Riera +4 more
wiley +1 more source
Ballast Water Control and Management in Brunei Darussalam
ASEAN Journal on Science and Technology for Development, 2018 The ongoing transfer of non-indigenous organisms through shipping, especially via ballast water transport, is placing marine and coastal resources under increased threat.
Hjh Zuliza Hj Jolkifli +1 more
doaj +1 more source
B‐WIM System Development for a Railway Bridge based on simulated data
ce/papers, Volume 9, Issue 2-3, Page 2971-2976, September 2026.Abstract Bridge Weigh‐In‐Motion (B‐WIM) technology can estimate axle loads and traffic parameters directly from structural responses, making it a valuable tool for structural health monitoring (SHM). Although there are developing benchmarks for road bridges, its application to railway bridges is limited due to unique challenges.
László Barbély, Attila László Joó
wiley +1 more source
The influence of membranes on tests of coarse-grained materials at low cell pressures
, 2014 In triaxial tests on small specimens of sands/silts and clays, cell pressures are usually greater than 100 kPa and membranes are relatively thin (~0.3 mm).
Powrie, W. +3 more
core +2 more sources
Assessing the Impact of Sand-Induced Ballast Fouling on Track Stiffness and Settlement
GeotechnicsThis study investigates the impact of sand-induced ballast fouling on railway track performance, focusing on track stiffness (modulus), settlement, and overall degradation.
Mohammed A. Alzhrani +2 more
doaj +1 more source
Ecology and Evolution, Volume 16, Issue 9, September 2026.Biomonitoring has scaled rapidly with high‐throughput sequencing, but most programs still culminate in taxa lists that are weakly linked to the interaction dynamics driving ecosystem change. Here we propose Biomonitoring 3.0 as interaction‐ready, time‐resolved monitoring that layers eDNA inventories with time‐structured sampling, interaction‐explicit ...
Leandro Lofeu, Ehsan Pashay Ahi
wiley +1 more source
The Interaction Between Railway Vehicle Dynamics And Track Lateral Alignment [PDF]
This thesis examines the effect of vehicle dynamics on lateral deterioration of the track alignment. As rail traffic runs along a route, the forces imposed upon the track cause the ballast to settle, and hence the track geometry deteriorates.
Gong, Cencen
core +3 more sources