Results 61 to 70 of about 48,655 (224)
Analysis of S-duct's fluid-solid-thermal coupling characteristic considering creep effect
Hangkong gongcheng jinzhanFor the hypersonic vehicle whose inlet and combustion chamber are not on the same axis，the S-duct is an important component，and its main function is to turn the air flow. In order to study the influence of multi-field coupling effect of creep material on
LIN Yuan +9 more
doaj +1 more source
The Unintended Consequences of German Deterrence
Global Policy, EarlyView.ABSTRACT Germany's evolving deterrence posture boils down to continued participation in NATO nuclear sharing and an ambitious conventional rearmament program. Due to its non‐nuclear status and a result of decades of underinvestment, Germany prioritizes modern conventional weapons.
Ulrich Kühn
wiley +1 more source
Case Studies in Thermal EngineeringThis study numerically investigates the combined effects of double flat aerodisks and rear opposing jets on the drag and heat reduction performance of a hypersonic spiked blunt body. Uncertainty quantification and sensitivity analysis are performed using
Ni He, Yu Pan, Zhenkang Zhang, Jian Chen
doaj +1 more source
Reusable high-temperature heat pipes and heat pipe panels [PDF]
, 1989 A reusable, durable heat pipe which is capable of operating at temperatures up to about 3000 F in an oxidizing environment and at temperatures above 3000 F in an inert or vacuum environment is produced by embedding a refractory metal pipe within a carbon-
Camarda, Charles J., Ransone, Philip O.
core +1 more source
Machine Learning for Observables: Reactant to Product State Distributions for Atom-Diatom Collisions
, 2020 Machine learning-based models to predict product state distributions from a distribution of reactant conditions for atom-diatom collisions are presented and quantitatively tested.
Arnold, Julian +5 more
core +1 more source
Universities as the Next Counterintelligence Battleground in Geopolitical Contests
Global Policy, EarlyView.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
A Scramjet Compression System for Hypersonic Air Transportation Vehicle Combined Cycle Engines
Energies, 2018 This paper proposes a compression system for a scramjet, to be used as part of a combined cycle engine on a hypersonic transport vehicle that can achieve sustained flight at 8 Mach 8.
Devendra Sen +2 more
doaj +1 more source
On the influence of acoustic waves on coherent bremsstrahlung in crystals
, 2003 We investigate the coherent bremsstrahlung by relativistic electrons in a single crystal excited by hypersonic vibrations. The formula for the corresponding differential cross-section is derived in the case of a sinusoidal wave.
A. A. SAHARIAN +6 more
core +1 more source
Hypersonic Modes in Nanophononic Semiconductors [PDF]
Physical Review Letters, 2008 Frequency gaps and negative group velocities of hypersonic phonon modes in periodically arranged composite semiconductors are presented. Trends and criteria for phononic gaps are discussed using a variety of atomic-level theoretical approaches. From our calculations, the possibility of achieving semiconductor-based one-dimensional phononic structures ...
Hepplestone, SP, Srivastava, GP
openaire +3 more sources
War as a Phenomenon of Inquiry in Management Studies
Journal of Management Studies, EarlyView.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