Results 41 to 50 of about 9,983 (255)

3D-printed multifunctional chiral metamaterial with invariant sound absorption under large deformation and low-frequency vibration control

Virtual and Physical Prototyping
Acoustic metamaterials provide a distinctive route for reducing low-frequency noise and vibration; however, most are characterised by their singular functionality, e.g. sound absorption or vibration suppression.
Jingjian Xu, Xiang Song, Boyang Zhao, Hanjie Yang, Dan Sui, Jie Zhou, Heye Xiao   +6 more
doaj   +1 more source

3D Hydrodynamic Flow Lithography

Advanced Functional Materials, EarlyView.
ABSTRACT Continuous‐ and stop‐flow lithography are widely used to fabricate multi‐dimensional microstructures whose cross‐sectional morphology is dictated by the flow profile of multiple co‐flowing streams. Here, we introduce three‐dimensional hydrodynamic flow lithography (3D HFL), a platform for programmable generation of multi‐layered flow profiles ...
Yiying Zou, Mehmet Akif Sahin, Muhammad Zia Ullah Khan, Muhammad Usman Akhtar, Daniel Stoecklein, Ghulam Destgeer   +5 more
wiley   +1 more source

Prospective Evaluation of the Efficacy of Isolated Balloon Eustachian Tuboplasty: Short- and Medium-term Follow-up Results Based on Tubomanometry, ETDQ-7, Tympanometry, and Valsalva Maneuver

International Archives of Otorhinolaryngology
Introduction Balloon eustachian tuboplasty (BET) allows the treatment of the main etiology of eustachian tube disfunction (ETD).
Cátia Azevedo, Filipa Moreira, António Fontes Lima, Fernando Milhazes Mar, Sérgio Vilarinho, Luís Dias   +5 more
doaj   +1 more source

Atrial fibrillation designation with micro-Raman spectroscopy and scanning acoustic microscope

Scientific Reports, 2022
Atrial fibrillation (AF) is diagnosed with the electrocardiogram, which is the gold standard in clinics. However, sufficient arrhythmia monitoring takes a long time, and many of the tests are made in only a few seconds, which can lead arrhythmia to be ...
Ugur Parlatan, Seyma Parlatan, Kubra Sen, Ibrahim Kecoglu, Mustafa Ozer Ulukan, Atalay Karakaya, Korhan Erkanli, Halil Turkoglu, Murat Ugurlucan, Mehmet Burcin Unlu, Bukem Tanoren   +10 more
doaj   +1 more source

Wearable Kirigami‐Apertured Capacitive Sensors for Continuous Cardiac Volumetric Monitoring

Advanced Functional Materials, EarlyView.
A wearable kirigami‐apertured carbon nanotube‐paper composite (K‐CPC) capacitive sensor enables cardiac volumetric monitoring. The kirigami process creates a central aperture with cantilevered fibers that confine the electric field, enhancing both sensitivity and lateral resolution.
Yu‐Jen Cheng, Shawn Kim, Jonathan Avery, Younghoon Kwon, Jae‐Hyun Chung   +4 more
wiley   +1 more source

Design and Characterization of a Two‐Dimensional Soft Array Based on Cooperative Dielectric Elastomer Actuators

Advanced Functional Materials, EarlyView.
A fully polymeric two‐dimensional array of Dielectric Elastomers enables self‐sensing, cooperative actuation, and large‐stroke operation in a DE‐based autonomous conveyor. Based only on voltage and current measurements at actuator level, the system detects the presence of a ball and subsequently drives it toward a target position.
Saverio Addario, Alberto Priuli, Giovanni Soleti, Sebastian Gratz‐Kelly, Benjamin Zemlin, Stefan Seelecke, Gianluca Rizzello   +6 more
wiley   +1 more source

An Acoustic Impedance Model for Evaluating the Ground Effect of Static-Firing Tests on a Rocket Motor

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, 2011
The accurate evaluation of the ground reflection effect is of importance for acoustic measurement conducted during static-firing tests of rocket motors. The effectiveness of existing acoustic impedance models was examined by comparing experimental data collected from acoustically hard surfaces. Through these comparisons and the subsequent evaluation of
FUKUDA, Kota, TSUTSUMI, Seiji, UI, Kyoichi, ISHII, Tatsuya, TAKAKI, Ryoji, FUJII, Kozo   +5 more
openaire   +2 more sources

Decoupling Electron and Phonon Transport in 3D‐Printed Bismuth Telluride via Synergistic Compositional Co‐Enrichment

Advanced Functional Materials, EarlyView.
In this work, we use direct ink writing (DIW) to 3D print Bi2Te3‐based materials and naturally induce hierarchical functional nanostructures, which reduced the lattice thermal conductivity by half, resulting in high zT of 0.87and 0.89 in p‐type and n‐type compounds, respectively, competitive with commercial materials.
Liangwei Hu, Wenhao Xie, Han Tang, Xiaolong Sun, Muyang Huang, Xiaolu Zhu, Yineng Gou, Weishuai Wang, Yun Zheng, Yue Hou, Guoqiang Wu, Ady Suwardi, Ziyu Wang   +12 more
wiley   +1 more source

Gradient‐Conductivity Architecture Enables Synchronous Enhancement of Sensitivity and Detection Range in Multifunctional All‐Paper Sensors

Advanced Functional Materials, EarlyView.
A gradient‐engineered all‐paper sensor is fabricated by integrating MXene and in situ grown AgNPs within hierarchical cellulose networks. The device breaks the sensitivity–detection range trade‐off through cascaded conductive pathways, enabling ultrahigh pressure sensitivity, humidity–pressure decoupled dual‐mode sensing, and outstanding EMI shielding,
Ao Li, Jun Xu, Dezhong Xu, Zhaohui Zhang, Jiyi Li, Daxian Cao, Kefu Chen, Mizi Fan   +7 more
wiley   +1 more source

Meta-structure based on coupled resonators for low-frequency broadband sound absorption

Acta Scientiarum: Technology
This work investigates and explains the behavior of an acoustic meta-structure based on different coupled Helmholtz resonators (HR). The analytical formulation of the Maa model is used to represent both the acoustic impedance and the sound absorption ...
Lucas Adelmo Santos, Gildean do Nascimento Almeida, Erasmo Felipe Vergara, Leandro Rodrigues Barbosa, Linconl César Bastos Farias   +4 more
doaj   +1 more source