Results 111 to 120 of about 19,687 (305)

Ultrasonic imaging of electrofusion welded polythene pipes employed in utilities industry [PDF]

, 2012
Electrofusion welding (EFW) is a widely used technique for joining polyethylene pipes in the oil, gas and water industry. Like many welding and joining methods, the joints created by EFW can exhibit a range of flaw types that can be attributed to process
Gachagan, Anthony, Thattaliyath Kadumberi, Arjun Prakash, O'Leary, Richard   +2 more
core  

Graphene‐Interfaced Stretchable Sweat Patch for Multiplexed Electrochemical Monitoring of IL‐6, Glucose, and Calcium Ions

Advanced Materials Technologies, EarlyView.
Flexible sweat sensor patch integrating graphene‑interfaced gold microelectrodes functionalized with bio‑receptors and ion‑selective membrane, coupled with a capillary‑driven microfluidic layer and portable potentiostat electronics for multiplexed monitoring of inflammatory, metabolic, and electrolyte biomarkers in microliter sweat volumes.
Roomia Memon, Ali Tufani, Süleyman Çelik, Javed H. Niazi, Anjum Qureshi   +4 more
wiley   +1 more source

The causal differential scattering approach to calculating the effective properties of random composite materials with a particle size distribution [PDF]

, 2009
An implementation of the Causal Differential Method (CDM) for modelling the effective properties of a random two-phase composite material is presented. Such materials are commonly used as ultrasonic transducer matching layersor backing layers. The method
Young, A., Mulholland, A.J., Mulholland, Anthony, O'Leary, R.L., O'Leary, Richard, Young, Andrew   +5 more
core   +1 more source

Research on a Composite Power-Superimposed Ultrasonic Vibrator for Wire Drawing

Applied Sciences, 2016
Vibration power and amplitude are essential factors in ultrasonic drawing processes, especially for difficult-to-draw materials like titanium and its alloys.
Shen Liu, Xiaobiao Shan, Kai Guo, Tao Xie   +3 more
doaj   +1 more source

Flexible Pressure Sensor With Co‐Optimized Sensitivity and Linearity Based on Gradient Toroidal Microstructures

Advanced Materials Technologies, EarlyView.
A flexible piezoresistive pressure sensor with gradient toroidal CNT/PDMS microstructures is reported. The hierarchical geometry enables sequential electrode contact, achieving a sensitivity of 256.20 kPa−1 and linear response (R2 = 0.99) over 0–1000 kPa.
Rongmei Wang, Ruolin Liu, Ming Lei, Yifan Liu, Fengming Hu, Bing Ji, Chao Peng, Jianyi Luo, Bingpu Zhou   +8 more
wiley   +1 more source

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  

Performance of a micro-engineered ultrasonic particle manipulator [PDF]

, 2004
An ultrasonic microfluidic particle manipulator has been modeled and its experimentally measured separation performance has been compared with the modeled results for 1 µm latex particles, and yeast particles in ...
Hill, M., Harris, N.R., Harris, NR, Beeby, SP, White, N.M., Harris, N R, Beeby, S P, Hill, M, Townsend, R., Townsend, R, Beeby, S.P., White, N M, White, NM   +12 more
core   +1 more source

Hand Gesture Recognition Using Ultrasonic Array with Machine Learning

Sensors
In the field of gesture recognition technology, accurately detecting human gestures is crucial. In this research, ultrasonic transducers were utilized for gesture recognition.
Jaewoo Joo, Jinhwan Koh, Hyungkeun Lee
doaj   +1 more source

Testing and Simulation of Multilayer Polyvinylidene Fluoride‐Based Piezoelectric Energy Harvester Devices

Advanced Materials Technologies, EarlyView.
The study considers the use of polymer/dielectric‐based multilayers piezoelectric Energy Harvesters (EH) to produce an output voltage and current, by exploiting the mechanical energy provided by human organs movements. In particular, the heart motion is considered from the kinematic viewpoint, and a multiphysics theoretical model is developed to assess
Hamdi Ezzin, Silvia Monchetti, Paolo Emilio Puddu, Luciano Teresi, Antonio DeSimone, Roberto Brighenti   +5 more
wiley   +1 more source

A Finite Element Approach to Modelling Fractal Ultrasonic Transducers [PDF]

, 2014
Piezoelectric ultrasonic transducers usually employ composite structures to improve their transmission and reception sensitivities. The geometry of the composite is regular with one dominant length scale and, since these are resonant devices, this ...
Algehyne, Ebrahem A., Mulholland, Anthony, Mulholland, Anthony J., Algehyne, Ebrahem   +3 more
core   +1 more source