Results 51 to 60 of about 3,082,518 (143)

Artefact‐aware Brillouin microscopy framework for root mechanical phenotyping

open access: yesJournal of Microscopy, EarlyView.
Abstract Plant roots continuously sense and respond to the mechanical signals of their growth environment: root cap function, mucilage secretion, and hormonal regulation jointly adapt root tip mechanics, shaping whether roots penetrate compacted layers or reorient around obstacles. Most current measurements of root mechanical properties require removal
Timm Landes   +6 more
wiley   +1 more source

Rarefied hypersonic flow simulations using the Navier-Stokes equations with non-equilibrium boundary conditions [PDF]

open access: yes, 2012
This paper investigates the use of Navier-Stokes-Fourier equations with non-equilibrium boundary conditions (BCs) for simulation of rarefied hypersonic flows.
Reese, Jason M.   +5 more
core   +2 more sources

ANALYSIS OF THREE DIMENSIONAL HYPERSONIC FLOW AROUND RE-ENTRY VEHICLE USING NAVIER-STOKES EQUATIONS

open access: yesHavacılık ve Uzay Teknolojileri Dergisi, 2014
The purpose of this study is to develop an accurate and efficient CFD code that can be used in hypersonic flows. The flow analysis is based on the three dimensional Navier-Stokes equations.
Muharrem Özgün, Sinan Eyi
doaj  

Effect of a Roughness Element on the Hypersonic Boundary Layer Receptivity Due to Different Types of Free-Stream Disturbance with a Single Frequency

open access: yesEntropy, 2019
The hypersonic flow field around a blunt cone was simulated using a high-order finite difference method. Fast acoustic waves, slow acoustic waves, entropy waves, and vortical waves were introduced into the free-stream to determine the influence of a free-
Mingfang Shi   +3 more
doaj   +1 more source

Fluid/Thermal/Structural Coupling Simulation on Effects of Forebody-Inlet Thermal Deformation on Intake Performance

open access: yes气体物理, 2023
Intake performance is one of the most important factors relating with the forebody-inlet design for air-breathing hypersonic vehicles. The intake performance will be altered due to hypersonic flow field change by the thermal deformation of forebody and ...
Si-yi LI   +5 more
doaj   +1 more source

Post‐flight assessment of the OSIRIS‐REx Sample Return Capsule (SRC) for organic and other potential contaminants

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Regolith samples from the carbonaceous asteroid Bennu were stowed and delivered to Earth in the OSIRIS‐REx spacecraft's Sample Return Capsule (SRC). We applied multiple analytical techniques to study the components of the post‐flight SRC, with a focus on assessing the conditions and any contaminants to which the Bennu samples were exposed ...
Scott A. Sandford   +35 more
wiley   +1 more source

Experimental Hypersonic Aerodynamics and Advances in Aerospace Engineering [PDF]

open access: yesفناوری در مهندسی هوافضا, 2017
Most space missions fall in the hypersonic reentry regime. There are several open questions and unknown phenomena in aerothermodynamics around vehicles at flow regimes exceeding Mach 4 due to its inherent complexities.
Shahed Malekipour, Mohammad Ebrahimi
doaj  

Comprehensive Evaluation of the Massively Parallel Direct Simulation Monte Carlo Kernel “Stochastic Parallel Rarefied-Gas Time-Accurate Analyzer” in Rarefied Hypersonic Flows—Part B: Hypersonic Vehicles

open access: yesComputation
In the past decade, there has been significant progress in the development, testing, and production of vehicles capable of achieving hypersonic speeds.
Angelos Klothakis, Ioannis K. Nikolos
doaj   +1 more source

Universities as the Next Counterintelligence Battleground in Geopolitical Contests

open access: yesGlobal Policy, Volume 17, Issue 4, Page 734-743, September 2026.
ABSTRACT Globally, universities are increasingly becoming the target of foreign national security actors, engaging in espionage, sabotage, foreign interference and intellectual property theft. Despite that, there has been no examination of the utilisation of counterintelligence approaches by universities to the threats they face from the subordination ...
Brendan Walker‐Munro   +1 more
wiley   +1 more source

War as a Phenomenon of Inquiry in Management Studies

open access: yesJournal of Management Studies, Volume 63, Issue 6, Page 2363-2397, September 2026.
Abstract We argue that war as a phenomenon deserves more focused attention in management. First, we highlight why war is an important and relevant area of inquiry for management scholars. We then integrate scattered conversations on war in management studies into a framework structured around three building blocks – (a) the nature of war from an ...
Fabrice Lumineau, Arne Keller
wiley   +1 more source

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