Results 61 to 70 of about 86,854 (292)

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Co-Design of Integrated Microwave Amplifier and Phase Shifter Using Reflection-Type Input Matching Networks for Compact MIMO Systems

Applied Sciences
This paper presents a co-design approach for a microwave amplifier–phase shifter that integrates an arbitrary termination impedance reflection-type phase shifter as the input matching network of a microwave transistor.
Palaystint Thorng, Phanam Pech, Girdhari Chaudhary, Yongchae Jeong   +3 more
doaj   +1 more source

A linear nonequilibrium thermodynamics approach to optimization of thermoelectric devices

, 2013
Improvement of thermoelectric systems in terms of performance and range of applications relies on progress in materials science and optimization of device operation. In this chapter, we focuse on optimization by taking into account the interaction of the
A Bejan, A Ioffe, B Andresen, B Andresen, B Andresen, BJ Wees Van, C Broeck Van den, C Goupil, C Goupil, CA Domenicali, D Nemir, F Curzon, GJ Snyder, H Houten Van, HB Callen, HB Callen, I Prigogine, II Novikov, JCA Peltier, JW Stevens, K Yasawa, L Onsager, L Onsager, M Esposito, M Esposito, M Freunek, N Nakpathomkun, N Pottier, O Karlström, P Salamon, R Kubo, T Schmiedl, TE Humphrey, U Seifert, U Sivain, Y Apertet, Y Apertet, Y Apertet, Y Apertet, Y Apertet, Y Rocard   +40 more
core   +1 more source

Tribological Performance of 60NiTi Alloy Under Varying Contact Conditions and Elevated Temperatures in Linear Reciprocating Sliding

Advanced Engineering Materials, EarlyView.
This study investigates the tribological response of 60NiTi alloy under dry, water‐lubricated and high‐temperature conditions. The alloy exhibits decreasing wear volume and friction with increasing temperature due to the formation of protective oxide layers. The work clarifies dominant wear mechanisms and demonstrates the suitability of 60NiTi for high‐
Anthony Onyebuchi Okoani, Miguel Angel Selles, Maziar Ramezani   +2 more
wiley   +1 more source

A New Approach for Impedance Tracking of Piezoelectric Vibration Energy Harvesters Based on a Zeta Converter

Sensors, 2020
Piezoelectric energy harvesters (PEHs) are a reduced, but fundamental, source of power for embedded, remote, and no-grid connected electrical systems. Some key limits, such as low power density, poor conversion efficiency, high internal impedance, and AC
Antonino Quattrocchi, Roberto Montanini, Salvatore De Caro, Saverio Panarello, Tommaso Scimone, Salvatore Foti, Antonio Testa   +6 more
doaj   +1 more source

Enhanced Gamma Radiation Shielding Using Epoxy Quartz Fabric Composites Reinforced With CoCl2 Microparticles

Advanced Engineering Materials, EarlyView.
The growing demand for lightweight, nontoxic, and multifunctional gamma shielding materials has intensified efforts to find alternatives to conventional lead and aluminum‐based protectants. In this work, we develop epoxy quartz fabric composites reinforced with cobalt chloride (CoCl2) microparticles, fabricated via hand lay‐up with varying filler ...
Summan Urooge, Ahsan Irshad, Umar Jamil, Srosh Fazil, Khuram Liaqat, Kashif Shahzad, Fakhar Alam, Mehboob Alam   +7 more
wiley   +1 more source

Fabrication and Characterization of Three-Dimensional Microelectromechanical System Coaxial Socket Device for Semiconductor Package Testing

Sensors, 2023
With the continuous reduction in size and increase in density of semiconductor devices, there is a growing demand for contact solutions that enable high-speed testing in automotive, 5G, and artificial intelligence-based devices.
Tae-Kyun Kim, Jong-Gwan Yook, Joo-Yong Kim, Yong-Ho Cho, Uh-Hyeon Lee   +4 more
doaj   +1 more source

Probe modeling for millimeter-wave integrated-circuit horn antennas [PDF]

, 1992
Integrated-circuit probe-excited horn-antenna arrays etched in silicon are well developed. They are a very promising class of antenna arrays for milli-meter and submillimeter applications.
Chiao, Jung-Chih, Guo, Yong, Potter, Kent A., Rutledge, David B.   +3 more
core   +1 more source

Enhanced Power Output in Polymer Thermoelectric Devices through Thermal and Electrical Impedance Matching [PDF]

ACS Applied Energy Materials, 2019
Maximizing the power outputs of devices using benchmark materials is critical for the application of organic thermoelectrics. We report the fabrication of thermoelectric devices using poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) with a Ni foil and polyimide film.
Masakazu Mukaida, Kazuhiro Kirihara, Qingshuo Wei   +2 more
openaire   +1 more source

Piezoresistive Monitoring of Carbon Nanomaterial‐Reinforced Epoxy Composites Under Cyclic and Fatigue Loading: A Review

Advanced Engineering Materials, EarlyView.
Carbon nanomaterial‐reinforced epoxy composites exhibit pronounced piezoresistive behavior, enabling intrinsic damage sensing under cyclic and fatigue loading. This review critically compares carbon nanotube and graphene systems, correlating filler content, percolation threshold, and gauge factor with sensing stability and damage evolution.
J. M. Parente, J. Nunes‐Pereira, A. P. Silva, P. N. B. Reis   +3 more
wiley   +1 more source