Results 71 to 80 of about 15,172 (317)

Aplicação do ultra-som na estimativa da profundidade de fendas superficiais e na avaliação da eficácia de injeções em elementos de concreto armado [PDF]

, 2007
Dissertação ( mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Civil.Técnicas não destrutivas baseadas na propagação de ondas de ultra-som vêm sendo cada vez mais utilizadas para avaliação da
Medeiros, Arthur
core  

Ultrasonic pulse velocity data for Maitland and Stellawood cemeteries, and laboratory experimental data to establish ultrasonic pulse velocity equipment limitations

, 2023
Cemeteries were used as time-series laboratories to assess weathering effects on gabbro stone as a function of different climatic forcings. Tombstones were measured using ultrasonic pulse velocity, which is a recognised assessment proxy for material ...
Michael Loubser (17281771)
core   +1 more source

Kelvin Probe Force Microscopy in Bionanotechnology: Current Advances and Future Perspectives

Advanced Materials, EarlyView.
Kelvin probe force microscopy (KPFM) enables the nanoscale mapping of electrostatic surface potentials. While widely applied in materials science, its use in biological systems remains emerging. This review presents recent advances in KPFM applied to biological samples and provides a critical perspective on current limitations and future directions for
Ehsan Rahimi, Mario Palacios‐Corella, Arjan Mol, Salvador Pané, Josep Puigmartí‐Luis   +4 more
wiley   +1 more source

The use of non-destructive testing to evaluate the compressive strength of a lime-stabilised rammed-earth wall: Rebound index and ultrasonic pulse velocity

, 2020
The non-standardization of rammed earth construction involves the quality control of such a technique to be so troublesome that it is generally avoided.
J. J. Martín-del-Río, J. Canivell, Raúl M. Falcón   +2 more
semanticscholar   +1 more source

A Comparative Study between the Effect of Steel Fiber on Ultrasonic Pulse Velocity (UPV) in Light and Normal Weight Self-Compacting Concretes

IOP Conference Series: Materials Science and Engineering, 2020
This research presents a comparative study to highlight the differences between the effect of using various contents of steel fibers on the ultrasonic pulse velocity (UPV) in two types of self-compacting concretes (SCC) which are identical in their ...
Ahmed S. D. Al-Ridha, Ali A. Abbood, Saeb F. Al-Chalabi, Abaa M. Aziz, Layth Sahib Dheyab   +4 more
semanticscholar   +1 more source

Flexible Dielectric Acoustic Resonator Patch for Tissue Regeneration

Advanced Materials, EarlyView.
A flexible dielectric acoustic resonator patch enables MHz‐range ultrasound generation through resonance amplification without using piezoelectric materials. Conformal integration on a curved substrate allows efficient acoustic delivery to tissue‐mimicking environments.
Donyoung Kang, Byeongseok Ryu, Sujeong Ahn, Junhyub Kim, Myeonghun Jang, Jeong Ho Cho, Won‐Gun Koh, Hyungsuk Lee   +7 more
wiley   +1 more source

Análise do comportamento de ondas ultrassônicas em elementos fissurados de concreto e argamassa [PDF]

, 2014
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Civil, Florianópolis, 2014.Nesta pesquisa realizou-se um estudo para a ampliação do uso da técnica de ultrassom, através da ...
Carelli, Jhulis Marina
core  

Detection and Characterization of Long-Pulse Low-Velocity Impact Damage in Plastic Bonded Explosives

, 2005
Damage not only degrades the mechanical properties of explosives, but also influences the shock sensitivity, combustion and even detonation behavior of explosives. The study of impact damage is crucial in the vulnerability evaluation of explosives.
Chen PW, Huang FL, 丁雁生, Dai KD, Chen, PW (reprint author), Beijing Inst Technol, Natl Key Lab Explos & Safety Sci, Beijing 100081, Peoples R China.   +4 more
core   +1 more source

Effect of silica fume on the ultrasonic pulse velocity of cemented sand

Journal of Physics: Conference Series, 2020
One of the geotechnical engineering strategies for dealing with weak soils in a construction site is to modify their mechanical properties with the aid of soil improvement techniques.
I. Shooshpasha, A. Hasanzadeh, M. Kharun
semanticscholar   +1 more source

Ultrafast Vertical Organic Electrochemical Transistors With Ion‐Permeable Conductive Polymer Top Electrodes

Advanced Materials, EarlyView.
Vertical organic electrochemical transistors (vOECTs) are limited in speed by ion‐impermeable metal electrodes that slow ion injection. Using ion‐permeable PBFDO top electrodes allows direct vertical ion injection into BBL channels, achieving high current densities (>400 A cm−2), large on/off ratios (>106), and ultrafast switching in 28 µs. This sets a
Han‐Yan Wu, Yingxue An, Luigi Fabiano, Qifan Li, Qingqing Wang, Feng Zhang, Wenlong Jin, Miao Xiong, Junpeng Ji, Ugo Bruno, Grzegorz Greczynski, Grazia Maria Lucia Messina, Xianjie Liu, Chi‐Yuan Yang, Simone Fabiano   +14 more
wiley   +1 more source