Results 111 to 120 of about 98,594 (308)

Performance comparison of full-scale ramjet and scramjet using boron-based propellant

Defence Technology
This study investigates the performance boundaries of ramjet and scramjet engines fueled by boron-based propellant through full-scale engine modeling and three-dimensional computational fluid dynamics simulations.
Xianju Wu, Zhijun Wei, Yun Wang, Ling zhou, Yunhui Wang, Ningfei Wang   +5 more
doaj   +1 more source

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Capital flows to transition economies: what is the role of external shocks? [PDF]

During the recent international financial crisis, capital flows into Central and Eastern European transition economies have faced a serious threat of a “sudden stop.†But the specific dangers depend on these flows` macroeconomic determinants, which ...
Scott W Hegerty
core  

Experimental Thrust and Specific Impulse Analysis of Pulsed Detonation Combustor

Applied Sciences
Detonation combustion represents a significant advancement in efficiency over traditional deflagration methods. This paper presents a Pulsed Detonation Combustor (PDC) model that is designed with an aerodynamic mixing chamber featuring Hartmann–Sprenger ...
Andrei Vlad Cojocea, Ionuț Porumbel, Mihnea Gall, Tudor Cuciuc   +3 more
doaj   +1 more source

Experimental and Numerical Modal Analysis of Composite Sandwich Structures Using Surfboards as Model Systems

Advanced Engineering Materials, EarlyView.
This article presents an experimental and numerical modal investigation of composite sandwich structures using surfboards as model systems. By comparing different core materials and reinforcement strategies, the study demonstrates how local stiffeners influence vibrational response and introduce characteristic modal features, highlighting modal ...
Brett Connellan, Luca Lomazzi, Mathis Mercier, Kara Stark, Marc in het Panhuis   +4 more
wiley   +1 more source

A method to measure the mass specific impulse of partially ionized helium

, 1960
An apparatus to measure the mass specific impulse, Isp, of partially ionized helium flowing in a converging-diverging nozzle, was designed and fabricated. The mass specific impulse increased as the stagnation enthalpy, 110, increased.
Patterson, Maurice M
core   +1 more source

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Wide-range optimization of multi-stage compression inlet based on Bayesian optimization method

Kongqi donglixue xuebao
A Bayesian optimization method based on a Gaussian process model and Thompson sampling is proposed to optimize the performance of a multi-stage compression inlet across a wide Mach number range.
Chang Gao, Jun Chen, Zhengzhou Li, Zhijian Ding, Jianxia Liu   +4 more
doaj   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Polymer Interface Enables Reversible Quasi‐Solid Sulfur Conversion in Sodium‐Sulfur Batteries

Advanced Functional Materials, EarlyView.
The polymer interface enables a stable quasi‐solid sulfur conversion pathway in room‐temperature Na─S batteries. The coating regulates Na+ transport, stabilizes the cathode–electrolyte interphase, and accommodates mechanical stress, suppressing electrolyte decomposition and sulfur migration, thereby improving reaction uniformity, reducing polarization,
Reza Andaveh, Ying Zhao, Enzhong Jin, Zixin Zhang, Vinicius Martins, Parham Pirayesh, Yi Gan, Yi Yuan, Yijia Wang, Frederick Benjamin Holness, Changhong Cao, Jun Song, Yang Zhao   +12 more
wiley   +1 more source