Results 41 to 50 of about 1,976 (201)

Low-Frequency Feed-System-Coupled Combustion Instability in Hybrid Rocket Motors

Journal of Thermal Science and Technology, 2013
The low-frequency unstable combustion of hybrid rocket motors was investigated using the transfer function of the full thermal-combustion-gasdynamic coupled system that was coupled with a liquid oxidizer feed system.
Takakazu MORITA, Saburo YUASA, Koki KITAGAWA, Toru SHIMADA, Shigeru YAMAGUCHI   +4 more
doaj   +1 more source

Emerging Memory and Device Technologies for Hardware‐Accelerated Model Training and Inference

Advanced Electronic Materials, EarlyView.
This review investigates the suitability of various emerging memory technologies as compute‐in‐memory hardware for artificial intelligence (AI) applications. Distinct requirements for training‐ and inference‐centric computing are discussed, spanning device physics, materials, and system integration.
Yoonho Cho, Dae‐won Kim, Yujin Kim, Jung‐Heum Na, Yuwon Jeong, Dong‐Yeop Lee, Shinhyun Choi   +6 more
wiley   +1 more source

System Design and Launch of a Hybrid Rocket with a Star-Fractal Swirl Fuel Grain Toward an Altitude of 15 km

Applied Sciences
To achieve low-cost and on-demand launches of microsatellites, the authors have been researching and developing a micro hybrid rocket since 2014. In 2018, a ballistic launch experiment was performed using the developed hybrid rocket, where it reached an ...
Atsushi Takano, Keita Yoshino, Yuki Fukushima, Ryuta Kitamura, Yuki Funami, Kenichi Takahashi, Akiyo Takahashi, Yoshihiko Kunihiro, Makoto Miyake, Takuma Masai, Shizuo Uemura   +10 more
doaj   +1 more source

Comparison of Optimization Techniques and Objective Functions Using Gas Generator and Staged Combustion LPRE Cycles

Applied Sciences, 2022
This paper compares various optimization techniques and objective functions to obtain optimum rocket engine performances. This research proposes a modular optimization framework that provides an optimum design for Gas Generator (GG) and Staged Combustion
Suniya Sadullah Khan, Ihtzaz Qamar, Muhammad Umer Sohail, Raees Fida Swati, Muhammad Azeem Ahmad, Saad Riffat Qureshi   +5 more
doaj   +1 more source

HYBRID PROPELLANT ROCKET MOTOR [PDF]

International Conference on Aerospace Sciences and Aviation Technology, 1999
The paper deals with hybrid propellant rocket motor as a propulsion unit of prospective rocket weapon systems, as well as a drive unit of some cosmic rocket carriers. There are introduced possible constructional schemes of hybrid propellant rocket motor and is mentioned further on the particular general internal ballistic solution of the solid part of ...
openaire   +1 more source

Strengthening urban resilience in China through underground infrastructures management: Addressing global climate challenges with technological solutions

Deep Underground Science and Engineering, EarlyView.
This paper explores how climate‐resilient technologies, such as smart grids, digital twins, and self‐healing materials, can enhance urban resilience. It highlights the urgent need for proactive planning, public‐private collaboration, and data‐driven innovation to future‐proof underground infrastructure amid accelerating climate and urban pressures ...
Kai Chen Goh, Tonni Agustiono Kurniawan, Christia Meidiana, Abdelkader Anouzla, Faissal Aziz, Imran Ali, Joan Cecilia C. Casila, M. Imran Khan, Dongdong Zhang, Meihui Jiang, Mohd Hafiz Dzarfan Othman, Md Munir Hayet Khan, Kasun Kumara Dissanayake   +12 more
wiley   +1 more source

Neural Network-Based Optimization of Hybrid Rocket Design for Modular Multistage Launch Vehicle

Aerospace
In this paper, an integrated optimization is carried out to find the optimal hybrid rocket engine design for a modular multistage launch vehicle targeting a 500 km polar circular orbit. A single hybrid rocket engine unit is reused across the whole launch
Paolo Maria Zolla, Alessandro Zavoli, Mario Tindaro Migliorino, Daniele Bianchi   +3 more
doaj   +1 more source

Concordance Between MR Safety Guidance Documents on Conditions for a Safe MR Environment

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background Environmental conditions established at facility design, construction, updates, and/or procurement of specialized equipment are the foundation of safe MR practice. Establishing an institutional MR safety program must take into consideration the conditions of the MR environment, and staff training should be tailored to its features ...
Ives R. Levesque, Véronique Fortier, Jorge Campos Pazmiño, Evan McNabb   +3 more
wiley   +1 more source

Combustion of Date Stone and Jojoba Solid Waste in a Hybrid Rocket-like Combustion Chamber

Aerospace
The performance of two solid biomass wastes, date stone and jojoba solid waste, was experimentally examined for their potential application in combustion and propulsion systems.
Saleh B. Alsaidi, Jeongmoo Huh, Mohamed Y. E. Selim   +2 more
doaj   +1 more source

First 20 Years of Orbitrap Mass Spectrometry as the Mainstream Analytical Technique

Mass Spectrometry Reviews, EarlyView.
ABSTRACT This review traces the first 20 years of Orbitrap mass spectrometry as a mainstream high‑resolution and accurate‑mass (HR/AM) technology. It outlines the historical development of the Orbitrap analyzer, the evolution of major instrument families, and the key technological innovations that enabled its widespread adoption. Particular emphasis is
Alexander Makarov
wiley   +1 more source