Results 161 to 170 of about 31,919 (261)

Raman Signature of the Wings of the Globe Skimmer Dragonfly: Pantala flavescens

open access: yesJournal of Raman Spectroscopy, Volume 57, Issue 4, Page 578-588, April 2026.
Raman spectroscopy is used to confirm the presence of aliphatic and aromatic hydrocarbons and related derivatives including aldehydes, halides, alcohols, acids, esters, and phenols on the wings of Pantala flavescens. The analysis indicates that wing‐surface lipid composition is largely consistent across the three main ecological zones in Ghana. Notably,
Rachel Desulme   +19 more
wiley   +1 more source

Harbor‐Induced Tidal Salinity Dispersion in Partially Stratified Estuaries

open access: yesJournal of Geophysical Research: Oceans, Volume 131, Issue 4, April 2026.
Abstract The contribution of tidal trapping to salt dispersion has been well described for well‐mixed estuaries, in terms of barotropic filling and emptying of the traps. How traps contribute to salt dispersion in deeper, partially stratified systems remains underexplored.
D. van Keulen   +2 more
wiley   +1 more source

Testing Nodal Point Relations by Tracking Sediment Through a Bifurcation on the Jefferson River, MT, USA

open access: yesJournal of Geophysical Research: Earth Surface, Volume 131, Issue 4, April 2026.
Abstract River bifurcations control water and sediment distribution in fluvial systems, but the physical mechanisms governing sediment partitioning remain poorly validated in natural rivers. We present a comprehensive field test of nodal point relations using radio frequency identification (RFID) tracking of 376 gravel clasts through a meandering river
Matthew D. Wanker   +4 more
wiley   +1 more source

Development of unstructured grid methods for steady and unsteady aerodynamic analysis [PDF]

open access: yes
The current status of the development of unstructured grid methods in the Unsteady Aerodynamics Branch at NASA-Langley is described. These methods are being developed for steady and unsteady aerodynamic applications.
Batina, John T.
core   +1 more source

Seismic Stratigraphy of the Peruvian Forearc Drifts from 3° to 7°S: Identification and Influence of Lower Layers of the Humboldt Current System

open access: yesPaleoceanography and Paleoclimatology, Volume 41, Issue 4, April 2026.
Abstract The seafloor morphology and subsurface geometry of a late Neogene contourite drift located along the Peru margin is documented for the first time using multibeam bathymetry, two‐dimensional and three‐dimensional seismic data. Along the margin several submarine canyons incise the shelf and slope.
Gérôme Calvès   +4 more
wiley   +1 more source

<i>Microraptor</i> reveals specialized gliding capabilities in multiwinged early paravians. [PDF]

open access: yesProc Natl Acad Sci U S A
Hefler C   +12 more
europepmc   +1 more source

A verification of unsteady Navier-Stokes solutions around oscillating airfoils [PDF]

open access: yes
A finite difference solution code for the two dimensional Navier-Stokes equations was combined with a moving-grid system. The thin layer Navier-Stokes equations with a turbulence model are solved in a time-accurate manner in order to study the unsteady ...
Nakamichi, J.
core   +1 more source

Mobilisation Alarm Use in Hospitals and Alignment With Person‐Centred Practice: A Qualitative Study

open access: yesJournal of Advanced Nursing, Volume 82, Issue 4, Page 3489-3508, April 2026.
ABSTRACT Aim To explore why and how staff use alarms for falls prevention in hospital and their alignment to person‐centred practice. Design Qualitative interpretive design. Methods One hundred focus groups and 25 interviews across 10 health services were completed between October 2022 and September 2024.
Kelly Stephen   +3 more
wiley   +1 more source

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