Zobrazeno 1 - 10
of 2 345
pro vyhledávání: '"Loss tangent"'
Publikováno v:
Journal of Eta Maritime Science, Vol 12, Iss 3, Pp 287-294 (2024)
The study of marine lubricants using modern methods for quality control and diagnostics of engine conditions is an important task. The solution to this task determines the technical condition of ships, their performance, and accident-free operation i
Externí odkaz:
https://doaj.org/article/6caca4eae5d94c0287780514564a707d
Publikováno v:
Telecom, Vol 5, Iss 3, Pp 706-722 (2024)
We present waveguide cavity measurements used to evaluate several thin materials for use in radomes. In addition to the data on the materials, we show how these measurements can be performed with common laboratory equipment and simple calculations. W
Externí odkaz:
https://doaj.org/article/8599390deacd44bdbb2a82915638879a
Publikováno v:
Frontiers in Materials, Vol 11 (2024)
Artificial intelligence (AI) and machine learning (ML) have enabled property-targeted design of glasses. Several machine learning models and open-source tools in the literature allow researchers to predict the optical, physical, mechanical, and elect
Externí odkaz:
https://doaj.org/article/fc6cfa4dcddc43aa8da52602259e210b
Autor:
A. V. Lobanova, K. S. Levchenko, G. E. Adamov, P. S. Smelin, E. P. Grebennikov, А. D. Kirilin
Publikováno v:
Тонкие химические технологии, Vol 19, Iss 1, Pp 52-60 (2024)
Objectives. To create new polymer materials based on organosilicon derivatives of benzocyclobutene and to study the possibility of their use as insulating dielectric layers in micro- and microwave electronics devices.Methods. The synthesis of the dib
Externí odkaz:
https://doaj.org/article/460631da5d7c4af6939133adb5046232
Publikováno v:
Covenant Journal of Engineering Technology, Vol 8, Iss 1 (2024)
Polytetrafluoroethylene (PTFE)-based composites are widely in demand for microwave substrate application due to their excellent dielectric properties and low power loss. In this work, PTFE matrix filled with different contents (5 wt.% – 25 wt.%) of
Externí odkaz:
https://doaj.org/article/c2f1f8c9b16e4227be977e8ce32ed9a7
Publikováno v:
IEEE Journal of Microwaves, Vol 4, Iss 4, Pp 666-674 (2024)
Hexagonal semiconductors such as 4H SiC have important high-frequency, high-power, and high-temperature applications. The applications require accurate knowledge of both ordinary and extraordinary relative permittivities, ϵ⊥ and ϵ||, perpendicula
Externí odkaz:
https://doaj.org/article/bde0f670f1a94d65851acd4f61af3072
Autor:
Mezache Zinelabiddine, Abdullah Alzahrani, Abdullah Alwabli, Amar Jaffar, Enas Ali, Mohammed S. Alzaidi
Publikováno v:
IEEE Access, Vol 12, Pp 33045-33056 (2024)
This study presents a new approach for characterizing the 3D printing electromagnetic properties in Polylactic Acid (PLA) using a novel cross-fractal sensor. The CST Studio Suite simulation, employing the finite element method (FEM), and the ADS simu
Externí odkaz:
https://doaj.org/article/16d14fdea01b44508ca191a367896c75
Publikováno v:
Journal of Wood Science, Vol 69, Iss 1, Pp 1-10 (2023)
Abstract This study confirmed that the loss tangent (or tangent loss, tan δ) obtained from the longitudinal vibration of a wood log increases with the apparent density difference between sapwood and heartwood, owing to moisture content difference. T
Externí odkaz:
https://doaj.org/article/f3ac21688b22471ba99673b490e836e3
Publikováno v:
Crystals, Vol 14, Iss 8, p 735 (2024)
This article presents the theoretical study, numerical simulation and fabrication of a phase shifter and a stub resonator for use in microstrip ridge gap waveguide (MRGW) technology, using a liquid crystal (LC) in the substrate as a reconfigurable ma
Externí odkaz:
https://doaj.org/article/3354303bb2ac420ca370777bbe81c215
Autor:
Mohammad SHAHJAHAN, Anisuzzahan BHUİYAN, Mohammad SAJJAD HOSSAİN, Mohammad ASADUL HAQUE, Deba PRASAD PAUL
Publikováno v:
Journal of the Turkish Chemical Society Section B: Chemical Engineering, Vol 6, Iss 2, Pp 45-62 (2023)
An effort is made to find the solution to the new challenges of modification advancements in ferrite technologies. The hypothetical variation in the structural, magnetic, and electrical properties of cubic spinel magnesium aluminum ferrites introduce
Externí odkaz:
https://doaj.org/article/fd7f1c4df2f447b080d327a921db3e3a