Results 61 to 70 of about 185,751 (346)

Magneto-dielectric properties of doped ferrite based nanosized ceramics over very high frequency range

Engineering Science and Technology, an International Journal, 2016
In the present study, indium doped nano sized nickel zinc cobalt based ferrite ceramics with composition Ni0.5Zn0.3Co0.2InxFe2-xO4 (x = 0.2 and 0.4) were synthesized by a co-precipitation technique.
Ashish Saini, Pravendra Kumar, Blaise Ravelo, Sebastian Lallechere, Atul Thakur, Preeti Thakur   +5 more
doaj   +1 more source

Mechanical analysis of helmeted headforms under ballistic impact with implications in performance evaluation of ballistic helmets

Frontiers in Mechanical Engineering, 2023
Behind helmet blunt trauma is a significant health concern in modern warfare. The ballistic response of the human head under ballistic impact is highly sought. Towards this end, we conducted ballistic experiments on three different headforms.
Atul Harmukh, Abhilash Singh, Praveen Kumar, Sanjeev K. Verma, Pal Dinesh Kumar, S. G. Ganpule, S. G. Ganpule   +6 more
doaj   +1 more source

Wide‐Range Adaptive Metal Oxide for Hydrogen Sulfide Detection From Earth to Space‐Like Environments

Advanced Science, EarlyView.
This work presents a gas sensing platform based on Cu‐doped SnO2 microspheres that operates reliably from ambient to space‐like conditions. The sensor maintains performance across vacuum and cryogenic environments, bypassing traditional oxygen‐mediated mechanisms, utilizing direct chemisorption and interfacial charge transfer.
Xi Chen, Jiaxin Chen, Yanghui Liu, Junhao Cao, Yang Yuan, Kaixin Chen, Yilang Ye, Tongshuai Yang, Yongqing Fu, Wei Luo   +9 more
wiley   +1 more source

Ejecta‐Modulated Bubble Dynamics Play a Dominant Role in Stone Retropulsion

Advanced Science, EarlyView.
Stone motion during laser ablation is shown to result primarily from asymmetric cavitation bubble collapse, not from ejecta recoil. This challenges long‐standing assumptions and highlights the dominant role of bubble dynamics in laser–material interactions.
Obed S. Isaac, Arpit Mishra, Georgy N. Sankin, Junqin Chen, Pei Zhong   +4 more
wiley   +1 more source

Quantum Transport in a Nanosize Silicon-on-Insulator Metal-Oxide-Semiconductor

, 2003
An approach is developed for the determination of the current flowing through a nanosize silicon-on-insulator (SOI) metal-oxide-semiconductor field-effect transistors (MOSFET).
B. Sorée, Balaban S. N., Bordone P., Castella F., Frank D. J., J. T. Devreese, Keldysh L. V., Keldysh L. V., Lundstrom M., M. D. Croitoru, Pokatilov E. P., Prange R. E., V. M. Fomin, V. N. Gladilin, W. Magnus, W. Schoenmaker   +15 more
core   +1 more source

Borophene: Crucial Challenges and the Way Forward

Advanced Science, EarlyView.
This review explores the challenges and progress in borophene research, focusing on synthesis strategies, structural properties, and potential applications. It highlights key experimental breakthroughs, discusses theoretical insights into borophene's unique features, and addresses pathways for overcoming stability and scalability issues.
Zhixuan Li, Jeyaraman Sankar, Prashant Kumar, Ajayan Vinu   +3 more
wiley   +1 more source

Transparent glass–ceramics for ballistic protection: materials and challenges

Journal of Materials Research and Technology, 2019
The military ballistic protection market has reached approximately US$ 10 billion/year, and the civil market is also very significant and is steadily increasing, which drives research for new ballistic protection alternatives.
Leonardo Sant’Ana Gallo, Mariana O.C. Villas Boas, Ana C.M. Rodrigues, Francisco C.L. Melo, Edgar D. Zanotto   +4 more
doaj   +1 more source

Interaction correction to the conductance of a ballistic conductor

, 2007
In disordered metals, electron-electron interactions are the origin of a small correction to the conductivity, the "Altshuler-Aronov correction". Here we investigate the Altshuler-Aronov correction of a conductor in which the electron motion is ballistic
A. I. Larkin, A. I. Larkin, B. L. Altshuler, B. L. Altshuler, B. L. Altshuler, Joern N. Kupferschmidt, L. P. Gorkov, L. P. Gorkov, M. Gutzwiller, Piet W. Brouwer   +9 more
core   +1 more source

Feline‐Inspired Robot Enabled by Combustion‐Driven Actuators for Agile Motion and High‐Payload Obstacle Traversal

Advanced Science, EarlyView.
Inspired by nature's competitive maneuvers, this study introduces a combustion‐driven soft actuator that powers a multi‐modal “Jump‐and‐Fly Catbot” (JFC). With millisecond response, high‐force output (over 70 times its weight) and precise control (error within 5%), the robot can jump, fly, hover, and escape from challenging environments, achieving ...
Hongkuan Ma, Yang Yang, Zhiguo He, Hongliang Ren, Pengcheng Jiao   +4 more
wiley   +1 more source

Submarine Indoor Air Quality and Crew Health: A Critical Narrative State-of-the-Art Review of Respiratory and Cardiovascular Risks

Toxics
Background: Submarines represent extremely confined environments where breathing air is continuously recirculated for extended periods with minimal renewal, generating complex multipollutant atmospheres. Objectives: This critical narrative review aims to
Jérôme Sinquin, Aurélie Sachot, Fabrice Entine, Jean-Ulrich Mullot, Marco Valente, Samir Dekali   +5 more
doaj   +1 more source