Results 21 to 30 of about 194,102 (294)

Effect of modifiers on the barium niobate-calcium ceramics structure

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2022
In this work, the ceramic samples Са0,3Ba0,7Nb2O6 pure and with modifying additives (5%) SrTiO3, KTaO3 or LiTaO3 were obtained by solid-phase synthesis. All studied compositions of ceramics revealed the presence of large and small grains.
O.S. Guseva, O.V. Malyshkina, A.S. Mitchenko   +2 more
doaj   +1 more source

Perfect absorption and giant magnification with a thin metamaterial layer [PDF]

, 2011
It is shown that perfect absorption and giant amplification can be realized when a wave impinges on a special metamaterial layer with zero real parts of the permittivity and permeability.
Alekseyev, Avitzour, Ciattoni, Enoch, Landy, Liu, N. Asger Mortensen, Oktel, Sailing He, Sanshui Xiao, Silveirinha, Smith, Tao, Wu, Xiao, Yi Jin, Zheludev, Ziolkowski   +17 more
core   +3 more sources

Low permittivity epoxy nanoporous composites filled with hollow nanosilica

IET Nanodielectrics, 2019
An epoxy nanoporous composite (NPC) filled with hollow nanosilica exhibits lower permittivity than unfilled epoxy resin. The hollow nanosilica is a silica nanoparticle containing a nanometric closed pore.
Muneaki Kurimoto, Takeyoshi Kato, Takeyoshi Kato, Takuma Yoshida, Chiharu Kato, Yasuo Suzuoki   +5 more
doaj   +1 more source

Microwave dielectric properties of horticultural peat products [PDF]

Mires and Peat, 2007
The microwave dielectric properties of horticultural peat and compost peat were measured with a HP85107C network analyser in conjunction with a HP85070B open-ended coaxial dielectric probe for the frequency range 0.5–20 GHz.
G. Ayalew, N.M. Holden, S.M. Ward
doaj  

Transmission Studies of Left-handed Materials

, 2001
Left-handed materials are studied numerically using an improved version of the transfer-matrix method. The transmission, reflection, the phase of the reflection and the absorption are calculated and compared with experiments for both single split-ring ...
C. M. Soukoulis, D.F. Sievenpiper, D.R. Smith, D.R. Smith, E. Özbay, I. El-Kady, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.B. Pendry, J.D. Joannopoulos, M. Sigalas, P. Markoš, R.A. Shelby, R.A. Shelby, V.G. Veselago   +19 more
core   +1 more source

Electromagnetic tunneling through a single-negative slab paired with a double-positive bi-layer [PDF]

, 2011
We show that resonant tunneling of electromagnetic fields can occur through a three-layer structure composed of a single-negative (i.e., either negative-permittivity or negative-permeability) slab paired with bi-layer made of double-positive (i.e ...
Andrea Alù, Giuseppe Castaldi, Ilaria Gallina, M. Born, Nader Engheta, Vincenzo Galdi   +5 more
core   +3 more sources

Microwave Interferometry Based On Open-ended Coaxial Technique for High Sensitivity Liquid Sensing

Advanced Electromagnetics, 2017
This paper describes a modified open-ended coaxial technique for microwave dielectric characterization in liquid media. A calibration model is developed to relate the measured transmission coefficient to the local properties of the sample under test.
H. Bakli, K. Haddadi
doaj   +1 more source

Processing Radargrams to Obtain Resistivity Sections

Remote Sensing, 2022
Ground penetrating radar (GPR) is routinely used to locate the isolated elements that produce reflection hyperbolas in radargrams. However, we propose a method in this study for locating the various interfaces appearing in a medium by studying the signal
Lucía Arévalo-Lomas, Bárbara Biosca, David Paredes-Palacios, Jesús Díaz-Curiel   +3 more
doaj   +1 more source

Determination of Effective Permittivity and Permeability of Metamaterials from Reflection and Transmission Coefficients

, 2002
We analyze the reflection and transmission coefficients calculated from transfer matrix simulations on finite lenghts of electromagnetic metamaterials, to determine the effective permittivity and permeability.
A. M. Nicholson, B. Gralak, C. M. Soukoulis, D. R. Smith, D. R. Smith, D. R. Smith, F. Mariotte, H. Kosaka, J. B. Pendry, J. B. Pendry, J. B. Pendry, M. Notomi, P. Markoš, P. Markoš, P. Markoš, R. A. Shelby, S. Schultz, V. G. Veselago, W. B. Weir   +18 more
core   +1 more source

Application of In-Situ and Soft-Sensors for Estimation of Recombinant P. pastoris GS115 Biomass Concentration: A Case Analysis of HBcAg (Mut⁺) and HBsAg (Mut^S) Production Processes under Varying Conditions

Sensors, 2021
Microbial biomass concentration is a key bioprocess parameter, estimated using various labor, operator and process cross-sensitive techniques, analyzed in a broad context and therefore the subject of correct interpretation.
Oskars Grigs, Emils Bolmanis, Vytautas Galvanauskas   +2 more
doaj   +1 more source