Results 21 to 30 of about 96,213 (310)

Spectrophotometric examination of monolithic zirconia materials

open access: yesFogorvosi Szemle, 2023
Introduction: Patients’ demand for perfectly esthetic restorations is unstoppably increasing, however creating naturallooking crowns and FPDs is highly affected by the experience of the dental technician even in the present day. This problem is even more
József Saláta   +6 more
doaj   +1 more source

Integrated Chip Technologies for Microwave Photonics

open access: yesLeida xuebao, 2019
Microwave photonic integrated chip technology is an important supporting technology of microwave photonic radar. It can not only realize the multifunction of devices, reduce the volume of microwave photonic radar, but also greatly improve the stability ...
QIAN Guang   +4 more
doaj   +1 more source

Improvement of Power Performance of GaN HEMT by Using Quaternary InAlGaN Barrier

open access: yesIEEE Journal of the Electron Devices Society, 2018
High power performance InAlGaN/GaN high electron mobility transistor (HEMT) as a candidate for high power and high frequency amplifiers has been demonstrated versus the conventional AlGaN/GaN HEMT by using the same device processes.
Wen Wang   +8 more
doaj   +1 more source

Optical Properties of Five Esthetic Ceramic Materials Used for Monolithic Restorations: A Comparative In Vitro Study

open access: yesCeramics, 2022
Zirconia has generated tremendous interest in the esthetic materials used for dental restorations. However, using conventional zirconia has some limitations especially in highly esthetically demanding situations, as it lacks the translucency that other ...
Saleh N. Almohammed   +2 more
doaj   +1 more source

On monolithic supermassive stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2020
ABSTRACT Supermassive stars have been proposed as the progenitors of the massive ($\sim \!10^{9}\, \mathrm{M}_{\odot }$) quasars observed at z ∼ 7. Prospects for directly detecting supermassive stars with next-generation facilities depend critically on their intrinsic lifetimes, as well as their formation rates.
Woods, Tyrone E   +2 more
openaire   +4 more sources

Direct-Triggering LTT With Monolithic Structure

open access: yesIEEE Journal of the Electron Devices Society, 2022
Light-triggered thyristor (LTT) has attracted considerable interest in power conversion and control systems because of its strong anti-interference ability and large power capacity.
Jinchao Yin   +5 more
doaj   +1 more source

A Survey on Microservices Architecture: Principles, Patterns and Migration Challenges

open access: yesIEEE Access, 2023
Microservices architecture is a new trend embraced by many organizations as a way to modernize their legacy applications. However, although there is work related to the migration process, there is a gap in the body of knowledge related to the principles ...
Victor Velepucha, Pamela Flores
doaj   +1 more source

Millimeter-Wave MMICs and Applications [PDF]

open access: yes, 2003
As device technology improves, interest in the millimeter-wave band grows. Wireless communication systems migrate to higher frequencies, millimeter-wave radars and passive sensors find new solid-state implementations that promise improved performance ...
Morgan, Matthew Alexander
core   +1 more source

An Accurate Method for Designing, Characterizing, and Testing a Multi-Layer Radome for mm-Wave Applications

open access: yesIEEE Access, 2020
This paper presents an accurate procedure to design, characterize and test a radome for millimeter-wave applications. In this procedure, an accurate analytical model is presented to design a radome structure that takes into consideration the bandwidth ...
Zeeshan Qamar   +2 more
doaj   +1 more source

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