Results 81 to 90 of about 99,906 (242)
The impacts of biological invasions
Biological Reviews, Volume 101, Issue 3, Page 1255-1310, June 2026.ABSTRACT The Anthropocene is characterised by a continuous human‐mediated reshuffling of the distributions of species globally. Both intentional and unintentional introductions have resulted in numerous species being translocated beyond their native ranges, often leading to their establishment and subsequent spread – a process referred to as biological
Phillip J. Haubrock +42 more
wiley +1 more source
Ultra-heavy vertical lift system: The Heli-Stat [PDF]
, 1975 A hybrid VTOL airship which is combined with helicopters is evaluated. The static lift of the airship supports approximately the full empty weight of the entire assembly.
Piasecki, F. N.
core +1 more source
Earthquake Engineering &Structural Dynamics, Volume 55, Issue 7, Page 1514-1532, June 2026.ABSTRACT The rapid development of new railway networks and the aging of existing infrastructure in seismic‐prone regions continue to motivate the need for efficient methods to simulate the dynamic behavior of coupled train track structure systems. While detailed train–structure interaction (TSI) models can capture complex mechanisms, they are often too
Miguel A. Gomez, Matthew J. DeJong
wiley +1 more source
Development of an ultrasonic resonator for ballast water disinfection [PDF]
, 2016 Ultrasonic disinfection involves the application of low-frequency acoustic energy in a water body to induce cavitation. The implosion of cavitation bubbles generates high speed microjets >1 km/s, intense shock wave >1 GPa, localized hot spots > ...
Balasubramaniam, Prakash +3 more
core +1 more source
Discrete elements method to model ballast behaviour under railway turnouts
Cogent EngineeringBallast behaviour has a profound impact on global track performance and durability, particularly for turnouts where dynamic forces are substantial. As ballast is a discontinuous material, this paper proposes the application of a Discrete Element Method ...
Ignacio Villalba Sanchis +4 more
doaj +1 more source
Spread and Population Dynamics of Rugulopteryx okamurae Across the Azores Archipelago (NE Atlantic)
Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 36, Issue 5, May 2026.ABSTRACT Rugulopteryx okamurae is a recently introduced brown macroalga that has expanded rapidly across the Azores (NE Atlantic). This study provides an update of the archipelago‐wide spatial spread and the first assessment of its local population dynamics.
Ana L. Santos +9 more
wiley +1 more source
Toroidal equipment packaging [PDF]
, 1974 For optimal packaging of equipment in shallow-cone vehicle toroidal packaging sets center of gravity of equipment forward. Packages are supported on rings within probe structure to provide low center of gravity.
Jones, W. J., Sherwood, J. W.
core +1 more source
Prediction of Lifespan of Railway Ballast Aggregate According to Mechanical Properties of it
The Baltic Journal of Road and Bridge Engineering, 2017 As the railway lifespan is the main criterion for selection of the aggregate for ballast and for planning the maintenance of the railroad, it is important to define the relationship between the particle load resistant characteristics and a lifetime of ...
Vaidas Ramūnas +4 more
doaj +1 more source
People and Nature, Volume 8, Issue 5, Page 1117-1127, May 2026.Abstract This study critically analyses the main narratives surrounding the Atlantic blue crab (Callinectes sapidus) in the Lagoon of Venice. We used a mixed‐method approach, performing a qualitative discourse analysis on a sample of 68 textual sources to identify the narratives across two sectors in the management of the case study: media and politics,
Elisa Zanoni +3 more
wiley +1 more source