نتایج جستجو برای: tanδ

تعداد نتایج: 114  

The present investigation was carried out to evaluate the application of Cloisite 30B organoclay (C30B) on the rheological, structural, electrical, and thermal characteristics of poly (methyl methacrylate)/multiwalled carbon nanotubes nanocomposites (PMMA/MWCNTs) fabricated by the simultaneous melt mixing. The microstructure and the state of nanofllers dispersion wereassessed by melt line...

Journal: :Computers, materials & continua 2022

With the help of in-body antennas, wireless communication among implantable medical devices (IMDs) and exterior monitoring equipment, telemetry system has brought us many benefits. Thus, a very thin-profile circularly polarized (CP) antenna, functioning in ISM band at 2.45 GHz, is proposed. A tapered coplanar waveguide (CPW) method used to excite antenna. The radiator contains pentagonal shape ...

Journal: :Crystals 2021

Ba0.5Sr0.5TiO3 (BST-0.5) thin films (600 nm) were deposited on single crystal MgO, SrTiO3 (STO), and LaAlO3 (LAO) substrates by pulsed laser deposition at an oxygen partial pressure of 80 mTorr temperature 720 °C. X-ray diffraction in situ reflection high-energy electron routinely ascertained the epitaxial quality (100)-oriented nanocrystalline films. The broadband microwave (1–40 GHz) dielectr...

Journal: :Journal of Materials Science: Materials in Electronics 2021

Nowadays, several research groups are extensively trying to develop by synthesizing and characterizing single/co-doped single-phase bismuth ferrite (BFO) in order get a highly efficient eco-friendly multifunctional devices. In this process, report is an attempt provide the detailed studies of structural, dielectric, impedance ferroelectric properties Bi(Fe0.85Dy0.15)O3 ceramic fabricated via so...

Journal: :Journal of composites science 2023

Human society’s need to build low-weight, high-strength and durable structures has increased the demand for composite materials. In this case, composites are used where high mechanical strength, low weight, sound thermal insulation properties required. One of most important issues now is designing materials coatings aimed at reducing heat loss resisting temperatures. way address problem develop...

Journal: :IEEE Antennas and Wireless Propagation Letters 2021

A miniature frequency-tunable slot-loop antenna (0.128λ 0 × 0.077λ ) based on ferroelectric K xmlns:xlink="http://www.w3.org/1999/xlink">0.5 Na NbO xmlns:xlink="http://www.w3.org/1999/xlink">3 (KNN) interdigitated varactors is investigated at Ku-band. KNN material has been selected a...

2014
Yutaka Inoue Kensuke Suzuki Rikimaru Maeda Arisa Shimura Isamu Murata Ikuo Kanamoto

The aim of this study is to examine the physicochemical properties of the external preparation, the effect on the skin permeability and the human senses. Miconazole nitrate cream formulation (MCZ-A: bland name and MCZ-B, -C, -D: generics) to measure the physicochemical properties, was performed by the skin permeation test and human sensory test. The flattening, viscoelasticity, and water conten...

2008
P. Yazdanbakhsh A. Bitz S. Orzada O. Kraff M. E. Ladd K. Solbach

Introduction Variation of the B1 field distribution at high field causes variation of the flip angles inside the patient’s body which leads to shading in the acquired images. Numerous methods have been proposed to mitigate B1 inhomogeneity. More recently, it was shown that “B1 shimming” can be performed using multiple transmitters [1,2], but utilizing these additional transmit channels effectiv...

2005
J. - H. Lee S. Sarkar S. Pinel J. Papapolymerou J. Laskar M. M. Tentzeris

In this paper, the development of three-dimensional (3-D) millimeter-wave functions in multilayer low temperature cofired ceramic (LTCC) and liquid crystal polymer (LCP) technologies is presented for millimeter-wave compact and easy-to-design passive solutions for high data rate wireless systems. Both ceramic and organic technologies are candidates for the 3-D integration of system-on-package (...

Journal: :هنرهای نمایش و موسیقی 0
سیده زهرا شریفی سوسری 1کارشناسی ارشد مهندسی علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، تهران کامبیز پورطهماسی دانشیارگروه مهندسی علوم و صنایع چوب و کاغذ، دانشکده منابع طبیعی، دانشگاه تهران، تهران آیدا س¬گلپایگانی دکتری مکانیک درخت و چوب، دانشگاه مونپلیه 2، مونپلیه، فرانسه ایریس برمود محقق و عضو گروه مکانیک درخت و چوب، در دانشگاه مونپلیه 2، مونپلیه، فرانسه

abstract: for many years, the wood of walnut tree (juglans regia) has been used for making santur. even though artisans have their own divers’ ideas about this species’ features; until now there has been no scientific data to support them. in santur’s case specially, differently cut surface plates can be formed into final instrument. besides, some steam treatments, which supposedly improve the ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید