Results 151 to 160 of about 139,401 (323)

Preparation and Electromagnetic-Wave-Absorption Properties of Cement-Based Materials with Graphite Tailings and Steel Fiber

Buildings
The development of functional building materials that can absorb electromagnetic radiation is important for preventing and controlling electromagnetic pollution in urban areas.
Qian Wang, Taibing Wei, Rong Wang, Deliang Zhu, Feiyu Liu, Huawei Li   +5 more
doaj   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

Advanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

An efficient reference-based adaptive antenna impedance matching CMOS circuit

, 2016
This paper presents a simple integrated reference based adaptive matching network capable of undertaking real time antenna tuning for applications such as wearable wireless sensors. The signal sent to the antenna is compared to a reference signal using a
Alexandre Robichaud, Robichaud, Alexandre, Deslandes, Dominic, Frederic Nabki, Nabki, Frederic, Dominic Deslandes   +5 more
core   +1 more source

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

Lump Circuit Modeling and Matching Consideration on Acoustical Transmitters for Underwater Application

, 2010
[[abstract]]In underwater environment the acoustical wave can transmit a long ranges away from the transmitter than the electromagnetic wave does. So far, the piezoelectric ceramic is still the best candidate as acoustical telemetry transmitters in ...
Yeong-Chin Chen; Sean Wu ; Cheng-Che Tsai
core  

Impedance Matching for Compact Multiple Antenna Systems in Random RF Fields

, 2016
We investigate the maximization of the received power from compact multiple antenna systems in random RF fields, using two novel impedance matching approaches.
Shanpu Shen, Ross D. Murch, Shen, Shanpu, Murch, Ross D.   +3 more
core   +1 more source

Tuned driving of piezoelectric resonators: impedance matching

Boletín de la Sociedad Española de Cerámica y Vidrio, 2006
For optimal operation of piezoelectric resonators, the electrical impedance of electronic drivers and the resonator itself must be matched. Lack of matching results in a non smooth transmission of electrical power between the drive and the load which, in
Pons, J. L., Fernández, J. F., Villegas, M., Ochoa, P., Ceres, R., Calderón, L., Rocon, E.   +6 more
doaj  

Influence of the Electrical Test Setup on the Voltage Gain Measurement of an Unloaded Rosen-Type Piezoelectric Transformer Vibrating in the First Three Modes

Measurement Science Review
In recent years, Piezoelectric Transformers (PTs) have become a great success due to their excellent properties, especially in applications requiring high voltage.
Boukazouha Faiza, Barkat Hamza, Rouabha Abdesselam, Herbadji Abderahim, Rguiti Mohamed   +4 more
doaj   +1 more source

Resolving the Cu(bdc) Conundrum: Identifying Non‐Porous Packing of Prototypical Coordination‐Network Thin Films Combining Advanced Diffraction Techniques and Computational Modelling

Advanced Functional Materials, EarlyView.
Solution‐processed Cu(bdc) forms prototypical MOF thin films for which a multitude of not fully satisfactory structural models have been suggested. Combining rotating grazing‐incidence diffraction and X‐ray reflectivity on two complementary samples with density‐functional theory, we first discard the previously suggested models and then identify a non ...
Narges Taghizade, Mario Fratschko, Robbin Steentjes, Mercedes Linares‐Moreau, Paolo Falcaro, Christof Wöll, Roland Resel, Egbert Zojer   +7 more
wiley   +1 more source

Artery‐on‐Chip Demonstrates Mechanical and Functional Features of Healthy and Diseased Living Smooth Muscle Tissue

Advanced Functional Materials, EarlyView.
This article details the development of an artery‐on‐chip platform for in vitro arterial disease modeling and therapeutic discovery. It describes the fabrication of a fibrin biomaterial scaffold seeded with iPSC‐derived smooth muscle and endothelial cells, mimicking native artery properties. Two genetic disease models showcase the platform's ability to
Danielle Yarbrough, Roy Chen, Katerina Katsouleas, Jaron Shoemaker, Travis Brady, Tianfang Yu, Jennifer Arthur Ataam, Connor Amelung, Lakshmi Santhanam, Ioannis Karakikes, Sharon Gerecht   +10 more
wiley   +1 more source