Results 51 to 60 of about 551,389 (167)
Vibration of railway bridges in the audible frequency range
, 2009 The noise level associated with a train travelling on a bridge is normally greater than that for a train travelling on plain track. It is sometimes the bridge noise that causes the highest levels of disturbance to people in the vicinity or triggers ...
Herron, David
core +1 more source
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
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
Latin American Journal of Solids and StructuresAbrupt track vertical stiffness variations along railway tracks can lead to increased dynamic loads, asymmetric deformations, damaged track components, and consequently, increased maintenance costs.
H. Heydari-Noghabi +3 more
doaj +1 more source
Non-Linear Analysis of The Dynamic Vertical Track-Bridge Interaction of a Simply Supported Skewed Railway Bridge [PDF]
EPJ Web of ConferencesThe objective of the present study is to investigate numerically the contribution of the vertical track to the vibratory response of a skewed girder bridge, incorporating single ballasted track, under the excitation of trains circulating at constant ...
Touharch Ayoub +2 more
doaj +1 more source
Biophysical structure and particle dynamics of an algal bloom within a mesoscale eddy
Limnology and Oceanography, Volume 71, Issue 9, September 2026.Abstract Mesoscale eddies create dynamically distinct environments where thermohaline fronts partition the biological and optical structure of the upper water column. How these fronts organize the vertical and lateral structure of spring blooms is a longstanding observational challenge, largely because the bloom environment evolves rapidly across ...
Kevin McGraw, Brian Ward
wiley +1 more source
Chengshi guidao jiaotong yanjiu[Objective] When high-speed trains operate on ballasted tracks, the complex airflow field around ballast particles can lead to track ballast splashing. The formation mechanism of this phenomenon remains unclear.
WANG Jiankai +3 more
doaj +1 more source
Civil and Environmental Engineering, 2016 The paper deals with the partial results of diagnostics of experimental sections of ballastless track Rheda 2000® and transition areas between ballastless and ballasted track structure around portals of tunnel Turecky vrch after six measurement cycles ...
Šmalo Michal
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Meteorological Applications, Volume 33, Issue 5, September/October 2026.A 2025 field campaign, based in Iceland, successfully deployed micro‐dropsonde sensors from stratospheric balloons in the Arctic. Atmospheric profiles were retrieved from a variety of data‐sparse regions. The campaign demonstrates the feasibility and value of balloon‐borne systems for enhancing Arctic observation and forecasting capability.
Matthew Fry, Dawn Harrison, Jonny King
wiley +1 more source
Buckling of a ballasted curved track under unloaded conditions
Advances in Mechanical Engineering, 2021 There is no industry accepted analytical model to compute the critical temperature differential for the buckling of an unloaded curved track in North American literature.
Nazmul Hasan
doaj +1 more source