Results 81 to 90 of about 1,628,958 (286)

The application of air-coupled ultrasonic systems and signal processing to the interrogation of concrete [PDF]

This thesis describes the application of ultrasound to the interrogation of concrete for the retrieval of quantitative information. In particular the use of air-coupled ultrasound is applied for the first time with recent improvement in ultrasonic ...
Berriman, James Robert Stockwell
core  

دراسة بعض خواص الخرسانة الرغویة باعتماد سرعة الموجات فوق الصوتیة

Iraqi Journal of Civil Engineering, 2007
Concrete is by far the most widely used construction material now today. Foamed concrete is light building material with good strength as well as low thermal conductivity and easy workability; it is produced by either Mix Foam Method or Preformed Foam ...
Amir Abdul-Rahman Hilal Al-Dulaimi
doaj   +1 more source

Phase‐Engineered MoS2 Quantum Monolayer Catalysts

Advanced Materials, EarlyView.
A new type of catalyst model—phase‐engineered MoS2 quantum‐monolayer catalyst (∼0.8 nm thick, < 6 nm in the lateral size; switchable freely among metallic 1T, semiconducting 2H, and a hybrid phase of metallic‐semiconducting 1T‐2H)—is reported. It can efficiently and stably drive photochemical H2, syngas and ammonia synthesis as a catalyst or co ...
Ruijie Yang, Yingying Fan, Lillian Pernitsky, Mojtaba Ebrahimian Mashhadi, Ningxin Chen, Md. Mehadi Hassan, Zheng Li, Heng Zhao, Liang Mei, Zhiyuan Zeng, Zhangxing Chen, Jinguang Hu, Qingye Lu   +12 more
wiley   +1 more source

Advances in Bio‐Integrated Edge Computing Systems for Smart and Connected Health

Advanced Materials, EarlyView.
This review explores advances in bio‐integrated edge computing for healthcare, focusing on co‐designing computing, sensing, and energy strategies to overcome integration and power challenges for optimized, decentralized operation. ABSTRACT Recent advances in bio‐integrated healthcare technologies have enabled continuous, high‐resolution monitoring and ...
Gyuwon Kim, Seungwon Yoo, Tae Woog Kang, Yunuo Huang, Woon‐Hong Yeo   +4 more
wiley   +1 more source

Pengaruh Variasi Mutu Beton Pada Benda Uji Balok Normal Dengan Menggunakan Metode Non Destructive Test

Rekayasa Sipil, 2019
This research aims to know the relationship of the pulse velocity to compression strength with a variation of the quality of the concrete based on the ultrasonic pulse velocity.
Kushariyanto, Christin Remayanti Nainggolan, Siti Nurlina   +2 more
doaj   +1 more source

2D Hierarchical Black Phosphorus‐Mn2O3 Heterostructured Composites for High‐Performance Flexible Supercapacitors

Advanced Materials Interfaces, EarlyView.
A sonochemical strategy constructs an ex situ 2D hierarchical black phosphorus–Mn2O3 heterostructure, enabling intimate interfacial coupling, enhanced charge transport, and improved electrochemical stability. The optimized BPM‐37.5% electrode delivers 466 F g−1 with 84% retention after 8000 cycles, while the flexible device exhibits high areal energy ...
Sowmiya Selvaraj, Anand Sreekantan Thampy   +1 more
wiley   +1 more source

Effect of Pouring Time on the Integrity of Pulverized Fuel Ash Concrete

Applied Sciences
The effects of pouring time intervals on the integrity of pulverized fuel ash (PFA) concrete were evaluated by measuring ultrasonic pulse velocity and compressive strength.
Longyue Ni, Dapeng Zheng, Haibin Yang, Xiaobo Ding   +3 more
doaj   +1 more source

THE EFFECT OF VARIATION CONCRETE CUBE OF AXIAL LOAD ON ULTRASONIC PULSE VELOCITY TRANSMITTER

Journal of the Civil Engineering Forum, 2015
Nowadays, Non Destructive Tests have been applied in some quality evaluation of existing concretes on site. One of the Non Destructive Test (NDT) methods is the application of the Ultrasonic Pulse Velocity (UPV) method. In general, utilizations of UPV as
Faqih Ma’arif, Priyosulistyo Priyosulistyo, Ashar Saputra   +2 more
doaj   +1 more source

Ultrasonic Pulse Velocity Evaluation of Cementitious Materials

, 2011
T. H. Panzera1, A. L. Christoforo1, F. P. Cota1, P. H. R. Borges2 and C. R. Bowen3 1Department of Mechanical Engineering, Federal University of Sao Joao del Rei UFSJ, Praca Frei Orlando, 170 Sao Joao Del Rei – MG, 2Department of Civil Engineering, Federal Centre for Technological Education of Minas Gerais, CEFET-MG, 3Materials Research Centre ...
Tulio H. Panzera, Andre L. Christoforo, Fabio de Paiva Cota, Paulo H. Ribeiro Borges, Christopher R. Bowen   +4 more
openaire   +2 more sources

High Energy Photon Induced Defect Engineering in Ultra‐Thin Indium Oxide Transistors for BEOL‐Compatible Logic Circuits

Advanced Materials Interfaces, EarlyView.
Xenon flash lamp annealing modulates oxygen‐vacancy states in 1‐nm‐thick ALD In2O3 transistors within a single 139 µs pulse. The photon‐induced defect engineering shifts the threshold voltage, improves bias‐stress stability, and narrows device‐to‐device variation across 64 devices. Combining pristine and treated transistors yields NMOS inverters with a
Sung Jin Park, SeYoon Jeon, In Ho Kim, Sang Jik Kwon, Min‐Kyu Park, Eou‐Sik Cho   +5 more
wiley   +1 more source