Cellulose paper for flexible electronics: design and technology

A highly stable conducting nanoink based on silver ultra-long nanowires (Ag ULNWs) was developed by a self-seeding polyol method with controlled doping of silver acetate for flexible electronics applications.

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Printable semiconductors for flexible electronics

AccessScience ◽

10.1036/1097-8542.yb071710 ◽

2015 ◽

Keyword(s):

Flexible Electronics

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RFIC and MMIC Design and Technology

10.1049/pbcs013e ◽

2001 ◽

Cited By ~ 119

Keyword(s):

Design And Technology

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Ball bearing turbocharger vibration management: application on high speed balancer

Mechanics & Industry ◽

10.1051/meca/2020091 ◽

2020 ◽

Vol 21 (6) ◽

pp. 619

Author(s):

Kostandin Gjika ◽

Antoine Costeux ◽

Gerry LaRue ◽

John Wilson

Keyword(s):

Dynamic Behavior ◽

High Speed ◽

Internal Combustion Engines ◽

Ball Bearing ◽

Squeeze Film ◽

Design And Technology ◽

Squeeze Film Damper ◽

Damping Coefficients ◽

Bearing Loads ◽

Stiffness And Damping

Today's modern internal combustion engines are increasingly focused on downsizing, high fuel efficiency and low emissions, which requires appropriate design and technology of turbocharger bearing systems. Automotive turbochargers operate faster and with strong engine excitation; vibration management is becoming a challenge and manufacturers are increasingly focusing on the design of low vibration and high-performance balancing technology. This paper discusses the synchronous vibration management of the ball bearing cartridge turbocharger on high-speed balancer and it is a continuation of papers [1–3]. In a first step, the synchronous rotordynamics behavior is identified. A prediction code is developed to calculate the static and dynamic performance of “ball bearing cartridge-squeeze film damper”. The dynamic behavior of balls is modeled by a spring with stiffness calculated from Tedric Harris formulas and the damping is considered null. The squeeze film damper model is derived from the Osborne Reynolds equation for incompressible and synchronous fluid loading; the stiffness and damping coefficients are calculated assuming that the bearing is infinitely short, and the oil film pressure is modeled as a cavitated π film model. The stiffness and damping coefficients are integrated on a rotordynamics code and the bearing loads are calculated by converging with the bearing eccentricity ratio. In a second step, a finite element structural dynamics model is built for the system “turbocharger housing-high speed balancer fixture” and validated by experimental frequency response functions. In the last step, the rotating dynamic bearing loads on the squeeze film damper are coupled with transfer functions and the vibration on the housings is predicted. The vibration response under single and multi-plane unbalances correlates very well with test data from turbocharger unbalance masters. The prediction model allows a thorough understanding of ball bearing turbocharger vibration on a high speed balancer, thus optimizing the dynamic behavior of the “turbocharger-high speed balancer” structural system for better rotordynamics performance identification and selection of the appropriate balancing process at the development stage of the turbocharger.

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The Expanding Role of Echocardiography in Interventional Cardiology

European Cardiology Review ◽

10.15420/ecr.2010.6.2.71 ◽

2010 ◽

Vol 6 (2) ◽

pp. 71 ◽

Cited By ~ 3

Author(s):

Lindsay A Smith ◽

Amit Bhan ◽

Mark J Monaghan ◽

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...

Keyword(s):

Interventional Procedures ◽

Imaging Modality ◽

Interventional Cardiology ◽

Design And Technology ◽

Team Approach ◽

Medical Problems ◽

Multidisciplinary Team Approach ◽

Case Selection ◽

Optimal Imaging

Echocardiography provides excellent realtime imaging of the heart, making it the imaging modality of choice immediately before, during and after cardiac interventional procedures. It helps to guide case selection and execution of the intervention, evaluates the effects of the intervention and enables early detection of complications. Advances in the design and technology of medical devices and delivery systems, coupled with demand for alternative non-surgical therapies for common medical problems, have led to an increase in the volume, variety and complexity of non-coronary cardiac interventional procedures performed. Many of these procedures require a multidisciplinary team approach and demand optimal imaging to ensure successful outcomes. The aim of this article is to review the expanding role of echocardiography in non-coronary interventional cardiology in adults.

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Fabrication of 3D Temperature Sensor Using Magnetostrictive Inkjet Printhead

Journal of Imaging Science and Technology ◽

10.2352/j.imagingsci.technol.2020.64.5.050405 ◽

2020 ◽

Vol 64 (5) ◽

pp. 50405-1-50405-5

Author(s):

Young-Woo Park ◽

Myounggyu Noh

Keyword(s):

Flexible Electronics ◽

Inkjet Printing ◽

Temperature Sensor ◽

Computer Aided Design ◽

Low Cost ◽

Three Dimensional ◽

Drop On Demand ◽

Aided Design ◽

Nanoparticle Ink ◽

Inkjet Printhead

Abstract Recently, the three-dimensional (3D) printing technique has attracted much attention for creating objects of arbitrary shape and manufacturing. For the first time, in this work, we present the fabrication of an inkjet printed low-cost 3D temperature sensor on a 3D-shaped thermoplastic substrate suitable for packaging, flexible electronics, and other printed applications. The design, fabrication, and testing of a 3D printed temperature sensor are presented. The sensor pattern is designed using a computer-aided design program and fabricated by drop-on-demand inkjet printing using a magnetostrictive inkjet printhead at room temperature. The sensor pattern is printed using commercially available conductive silver nanoparticle ink. A moving speed of 90 mm/min is chosen to print the sensor pattern. The inkjet printed temperature sensor is demonstrated, and it is characterized by good electrical properties, exhibiting good sensitivity and linearity. The results indicate that 3D inkjet printing technology may have great potential for applications in sensor fabrication.

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