Results 61 to 70 of about 2,038,281 (309)

Low-frequency acoustic isolation performance of Helmholtz cavity acoustic metamaterials with bilateral single openings

AIP Advances
In this study, we designed a single-opening Helmholtz chamber type acoustic metamaterial with two sides. The complexity of the open channel results in the material having a low frequency of the first sound insulation peak and excellent sound insulation ...
PeiZhou Hu, Jing-Bo Zhao, Hong Liu, XiaoSheng Zhang, Hong Yao, Guang-jun Zhang   +5 more
doaj   +1 more source

Simulation of the logistics to establish parity of military forces in a war zone

Авіаційно-космічна техніка та технологія, 2022
A multi-variant, multi-criteria task related to the simulation of the logistic process to establish the parity of military forces in the military conflict zone, which contributes to the successful implementation of the military operating goals, is set ...
Oleg Fedorovich, Oleg Uruskiy, Yurii Pronchakov, Andrii Rybka, Yuliia Leshchenko   +4 more
doaj   +1 more source

Origami‐Inspired Structural Design for Aquatic‐Terrestrial Amphibious Robots

Advanced Robotics Research, EarlyView.
This work presents a lightweight amphibious origami robot actuated by a single shape memory alloy wire. A rigid foldable origami structure with displacement amplification enables efficient terrestrial crawling and aquatic swimming. The addition of fan‐shaped units allows controllable turning in both environments.
Weiqi Liu, Chunlong Wang, Xiaohang Sun, Hongwei Guo, Jiayao Ma, Yan Chen   +5 more
wiley   +1 more source

Challenges and Future Directions in Assessing the Quality and Completeness of Advanced Materials Safety Data for Re‐Usability: A Position Paper From the Nanosafety Community

Advanced Sustainable Systems, EarlyView.
Nanosafety data provide a guiding example for establishing best practices in data management, aligning with FAIR principles and quality criteria. This review explores existing quality assessment approaches for reliability, relevance, and completeness, emphasizing the need for harmonization and adaptation to nanomaterials and advanced materials. The aim
Verónica I. Dumit, Irini Furxhi, Penny Nymark, Antreas Afantitis, Ammar Ammar, Monica J. B. Amorim, Dalila Antunes, Svetlana Avramova, Chiara L. Battistelli, Gianpietro Basei, Cecilia Bossa, Emil Cimpan, Mihaela Roxana Cimpan, Dmitri Ciornii, Anna Costa, Camilla Delpivo, Maria Dusinska, Ana Sofia Fonseca, Steffi Friedrichs, Vasile‐Dan Hodoroaba, Danail Hristozov, Panagiotis Isigonis, Nina Jeliazkova, Nikolay Kochev, Eva Kranjc, Dieter Maier, Georgia Melagraki, Anastasios G. Papadiamantis, Tomasz Puzyn, Hubert Rauscher, Katie Reilly, Araceli Sánchez Jiménez, Janeck J. Scott‐Fordsmand, Neeraj Shandilya, Hyun Kil Shin, Gergana Tancheva, Jeaphianne P. M. van Rijn, Egon L. Willighagen, Ewelina Wyrzykowska, Martine I. Bakker, Damjana Drobne, Thomas E. Exner, Martin Himly, Iseult Lynch   +43 more
wiley   +1 more source

Savremeno naoružanje i vojna oprema za broj 1-2008 / Modern weapons and military equipment for issue 1-2008 [PDF]

Vojnotehnički Glasnik, 2008
Nove varijante oklopnih vozila Ukrajine; Modularno višenamensko vozilo NIMR II 4×4; Izviđačko vozilo Ferret – Stallion; Novo lako taktičko vozilo JLTV; Autonomno vozilo Avantguard; Nova srednjezaštićena patrolna vozila; Novi oklop za laka vozila ...
Mirko Krbavac
doaj  

Chronic Hypoxia Disrupts Spermatogenesis Through ASXL2–EZH2–Mediated Microtubule Destabilization

Advanced Science, EarlyView.
This study reveals the mechanism by which chronic hypoxia impairs spermatogenesis via the ASXL2–EZH2 axis, hindering the transition of spermatids from round to elongated forms. Key findings reveal that under hypoxic conditions, downregulated ASXL2 expression reduces EZH2 binding to the CEP162 promoter, leading to decreased H3K27me3 modification and ...
Jun Yin, Mengjie Zhang, Wenying Liu, Wenlong Shen, Debao Li, Hongming Miao, Fang Deng, Gang Zhang, Yi Tian, Yi Zhang, Zhihu Zhao, Bing Ni   +11 more
wiley   +1 more source

Method for determining phase shift using two-phase interpolation transformation

Радіоелектронні і комп'ютерні системи
This study focuses on a method for accurately determining the phase shift between two harmonic signals. The proposed technique compares the waveform of the combined signal, which is obtained by applying a two-phase interpolation transformation, with a ...
Sergiy Gubin, Sergiy Tyshko, Serhii Bezmenov, Ihor Dovhyi, Emma Chimbanga   +4 more
doaj   +1 more source

Savremeno naoružanje i vojna oprema/Modern weapons and military equipment [PDF]

Vojnotehnički Glasnik, 2011
Transformabilno vozilo revitalizuje koncept "letećeg džipa". Sikorski koristi tehnologiju X2 za razvoj lakog taktičkog helikoptera. Rusija uspešno testirala raketu topuz. Indija testirala nuklearni projektil srednjeg dometa. Minijaturni šatl vraća se
Nebojša N. Gaćeša, Milan Babić
doaj  

Arms trade as a global international problem [PDF]

Međunarodni Problemi, 2013
The aim of this paper is to highlight the great social danger resulting from uncontrolled trade in arms and military equipment. A large number of terrorist attacks in the world show that uncontrolled arms trade is a growing problem for international ...
Spalević Žaklina, Bjelajac Željko, Dimitrijević Duško   +2 more
doaj   +1 more source

AI‐Optimized Vanadium Oxide Multilayers for More Than 20‐fold Enhancement in Bolometric Performance

Advanced Science, EarlyView.
Machine‐learning‐optimized WxV1‐xOy multilayer thin films with graded doping achieve a high TCR (7.3 % K−1), reduced hysteresis, and low noise under CMOS‐compatible growth conditions. This approach overcomes the long‐standing trade‐off in microbolometers between linear response and performance, offering a universal bolometric parameter greatly enhanced
Jin‐Hyun Choi, Hyoung‐Taek Lee, Jeonghoon Kim, Miju Park, Seungjoon Sun, Gye‐Hyeon Kim, Myung‐Ho Kwon, Hyeong‐Ryeol Park, Changhee Sohn   +8 more
wiley   +1 more source