Results 61 to 70 of about 174,361,874 (315)

Behaviors of lunar regolith simulants under varying gravitational conditions

npj Microgravity
Understanding the behavior of regolith in varying gravity conditions, is critical for space exploration and future missions. In this work, the gravity-driven hopper flow of lunar regolith simulant in different gravitational accelerations (terrestrial ...
Ian P. Madden, Sathyashri Muruganandam, Amine Missaoui, Oliver Gries, Jonathan Kollmer, Olfa D’Angelo, Suman Sinha-Ray   +6 more
doaj   +1 more source

High-gravity rotating packed bed synthesis of low-platinum PtCuFe/NC electrocatalysts for the oxygen reduction reaction

International Journal of Electrochemical Science
The commercialization of proton exchange membrane fuel cells is hampered by the sluggish kinetics of the oxygen reduction reaction and the high cost of platinum.
Hao Sun, Rujia Chen, Yujie Zhu, Baochang Sun, Yang Xiang, Jimmy Yun, Lei Shao   +6 more
doaj   +1 more source

Molecularly Dissipative Liquid Crystal Elastomer Foams for Impact and Vibration Attenuation

Advanced Functional Materials, EarlyView.
Liquid crystal elastomer foams integrate cellular deformation with mesogen reorientation to create a dual‐scale energy dissipation mechanism. Progressive pore collapse absorbs mechanical loads, while stress‐induced mesogen reorientation provides additional damping, resulting in reduced impact transmission and broadband suppression of vibrational ...
Subi Choi, Sangyeop Lee, In‐sun Jeong, Kyungjun Song, Eugene M. Terentjev, Suk‐kyun Ahn   +5 more
wiley   +1 more source

Linear higher-order Maxwell-Einstein-Scalar theories

Journal of High Energy Physics
In the context of the Higher-Order Maxwell-Einstein-Scalar (HOMES) theories, which are invariant under spacetime diffeomorphisms and U(1) gauge symmetry, we study two broad subclasses: the first is up to linear in R μναβ , ∇ μ ∇ ν ϕ, ∇ ρ F μν and up to ...
Mohammad Ali Gorji, Shinji Mukohyama, Pavel Petrov, Masahide Yamaguchi   +3 more
doaj   +1 more source

CLAUSEWITZ VS CLAUSEWITZ A DISCUSSION OF HOW HISTORY APPLIES TO OPERATIONS TODAY [PDF]

Annals: Series on Military Sciences, 2016
This paper addresses the center of gravity doctrine; this doctrine is applicable to some wars, at some moments, but not to all of them. Clausewitz predictedthis and stated that “in war the result is never final”.
Visarion NEAGOE, Petre LUCA
doaj  

Neuromorphic Devices for Extreme Environments: State‐Variable Reliability and Stabilization Strategies

Advanced Functional Materials, EarlyView.
Neuromorphic devices for extreme environments are interpreted through the physical states that store and process information. Radiation, temperature extremes, and vacuum can perturb vacancies, filaments, trapped charges, polarization, interfaces, and readout signals.
Taehyun Park, Geon Park, Junhyung Cho, Jaechan Song, Wangmyung Choi, Jaehyun Hur, Nicola Gasparini, Hocheon Yoo   +7 more
wiley   +1 more source

Measurement method of center of gravity and buoyancy for underwater objects based on equivalent center of gravity

四川大学学报. 自然科学版
The key to achieving low-gravity simulation on the ground through buoyancy in water is accurately measuring the center of gravity and the center of buoyancy of an object.For underwater objects， the classical method involves first measuring the center of ...
ZHANG Lei, SHE Jia-Hong, ZHAO Zai-Qian, LI Xu-Sheng   +3 more
doaj  

Microfluidic Engineering of Microgels: A Review of Emerging Technologies, Materials, Fabrication Strategies, and Applications

Advanced Healthcare Materials, EarlyView.
Recent advances in microfluidic technologies for microgel fabrication are critically reviewed, highlighting the capabilities and limitations of major microfluidic platforms and discussing how platform design, material selection, and crosslinking strategies influence microgel architecture and functionality. Current challenges and future opportunities in
Afshin Abrishamkar, Laura Neely, Cynthia Pham, Nada Ibrahim, Alexis Larios‐Cervantes, Ben A. Kertesz, Todd Hoare   +6 more
wiley   +1 more source

Body Segment Parameters During GS Turn in Recreational Skiers [PDF]

Sport Mont, 2017
Study aim was to analyze the kinematic parameters of the body of the examinees, without competitive experience in skiing, in order to determine the competitive efficiency.
Mijo Curic, Edin Mujanović, Tarik Huremović, Amra Nožinović Mujanović   +3 more
doaj  

Calculation Method of Gravity Center and Moment of Radial Gate

Renmin Zhujiang, 2021
The gravity moment of radial gate is an important factor affecting the opening and closing force.In this paper,the analytical formulas of gravity,gravity center and gravity moment of radial gate are derived theoretically,and the influence of two ...
LAN Qin, DUAN Dongxu, LIAO Yuhai, CHENG Zhong   +3 more
doaj