Academic literature on the topic 'Electric waves Measurement'

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Journal articles on the topic "Electric waves Measurement"

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Klimchitskaya, Galina L., and Vladimir M. Mostepanenko. "Casimir Effect Invalidates the Drude Model for Transverse Electric Evanescent Waves." Physics 5, no. 4 (2023): 952–67. http://dx.doi.org/10.3390/physics5040062.

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We consider the Casimir pressure between two metallic plates and calculate the four contributions to it determined by the propagating and evanescent waves and by the transverse magnetic and transverse electric polarizations of the electromagnetic field. The range of interplate separations is considered where nearly the whole pressure has its origin in the electromagnetic response of conduction electrons. In the Casimir physics, this response is described either by the dissipative Drude model resulting in contradictions with the measurement data or by the experimentally consistent but dissipati
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Lirette, Robert, Tomasz Karpisz, Małgorzata Musiał, et al. "Measurements of nonlinear electric-acoustic interactions in lead zirconium titanate." Journal of the Acoustical Society of America 155, no. 3_Supplement (2024): A204. http://dx.doi.org/10.1121/10.0027311.

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When electric and acoustic waves simultaneously pass through a piezoelectric material, nonlinearities can arise. The electric and acoustic waves can mix, generating a signal consisting of both sum and difference spectral components. Here we present a method of directly measuring the nonlinearly mixed electric-acoustic signal using a vector network analyzer (VNA). In normal VNA operation, sources and receivers operate at the same frequency. In our measurements, we employ a frequency offset mode, where receivers in the VNA can be tuned to a frequency different from the source frequency. Here, we
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PLYSHCHENKOV, BORIS D., and ANATOLY A. NIKITIN. "BOREHOLE ACOUSTIC AND ELECTRIC STONELEY WAVES AND PERMEABILITY." Journal of Computational Acoustics 18, no. 02 (2010): 87–115. http://dx.doi.org/10.1142/s0218396x10004085.

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New way for quantitative evaluation of any value of formation permeability based on numerical experiments with Pride's model of electrokinetic phenomena is presented. This approach is based on simultaneous measurement of pressure field and axial component of electric field excited by an acoustic source in fluid-filled borehole with help a set of receivers in borehole. Frequency dependence of ratio of the complex-valued amplitudes of the electric Stoneley wave to the pressure Stoneley wave obtained as a result of plane-wave decomposition of pressure field and mentioned component of electric fie
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Ghani, Muhammad Usman, M. Imran Jamil, Afaq Ahmad, and Saad Tariq. "Electron affinity measurement of hydrogen negative ion." Pakistan Journal of Emerging Science and Technologies (PJEST) 4, no. 2 (2023): 1–8. http://dx.doi.org/10.58619/pjest.v4i2.101.

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Photodetachment Microscopy experiment was first carried out in the presence of an electric field by Blondel et al in 1996 for Bromine negative ion. It measures the spatial distribution of ejected electrons on the detector screen which is a direct view of the spatial structure of the wave function of an atomic electron in the form of a ring pattern. From a semi-classical point of view, this ring pattern is formed because of the interference between two electron waves; one is direct while the other is reflected from an electric field. Following Blondel's photodetachment microscopy experiment, a
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Maeda, Masataka, Tatsuo Takada, and Masao Ide. "Measurement of Electric Field Distributions in Solid Dielectrics Using Ultrasonic Waves." Japanese Journal of Applied Physics 29, S1 (1990): 203. http://dx.doi.org/10.7567/jjaps.29s1.203.

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Sugaya, Toshio, and Yukio Kawano. "Frequency-Tunable Terahertz Plasmonic Structure Based on the Solid Immersed Method for Sensing." Sensors 21, no. 4 (2021): 1419. http://dx.doi.org/10.3390/s21041419.

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Terahertz waves are located in the frequency band between radio waves and light, and they are being considered for various applications as a light source. Generally, the use of light requires focusing; however, when a terahertz wave is irradiated onto a small detector or a small measurement sample, its wavelength, which is much longer than that of visible light, causes problems. The diffraction limit may make it impossible to focus the terahertz light down to the desired range by using common lenses. The Bull’s Eye structure, which is a plasmonic structure, is a promising tool for focusing the
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Assaffat, Luqman, Herman Dwi Surjono, and Fatchul Arifin. "Harmonic Detection of Electric Current using Machine Learning: A Literature Review." Journal of Advanced Research Design 132, no. 1 (2025): 140–51. https://doi.org/10.37934/ard.132.1.140151.

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The increased use of nonlinear devices makes distortions in the form of current and voltage waves unavoidable in power grids. As a result, harmonics, sub-harmonics and inter-harmonics often occur in the current and voltage spectrum. Harmonics cause many problems such as overpower loss, overvoltage, imbalance, flicker, relay miss operation, etc. Harmonic distortion of electric current can be measured directly in harmonically contaminated systems. Various standards have already been established in different measurement procedures and many other techniques have been proposed for analysing, charac
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Myllys, M., P. Henri, X. Vallières, et al. "Electric field measurements at the plasma frequency around comet 67P by RPC-MIP on board Rosetta." Astronomy & Astrophysics 652 (August 2021): A73. http://dx.doi.org/10.1051/0004-6361/201936633.

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Context. The Mutual Impedance Probe (RPC-MIP) carried by the Rosetta spacecraft monitored both the plasma density and the electric field in the close environment of comet 67P/Churyumov–Gerasimenko (67P), as the instrument was operating alternatively in two main modes: active and passive. The active mode is used primarily to perform plasma density measurements, while the passive mode enables the instrument to work as a wave analyzer. Aims. We are reporting electric field emissions at the plasma frequency near comet 67P observed by RPC-MIP passive mode. The electric field emissions are related t
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Kural, Aleksander, Rhys Pullin, C. A. Featherston, et al. "Wireless Power Transmission Using Ultrasonic Guided Waves – Electric Circuit Measurement and Simulation." Key Engineering Materials 518 (July 2012): 445–54. http://dx.doi.org/10.4028/www.scientific.net/kem.518.445.

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A project investigating the possibility to transmit electrical power (several mW) along the structure of an aircraft by using an intermediate medium of ultrasonic Lamb waves is being carried out at Cardiff University in conjunction with Airbus. This power supply method is aimed at wireless, surface-bonded sensor packages, primarily for the aircraft structural health monitoring (SHM) applications. It is expected to replace conventional batteries or energy harvesting devices. This paper presents methods of piezoelectric transducer characterisation, electric power measurement and electric circuit
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PLYSHCHENKOV, BORIS D., and ANATOLY A. NIKITIN. "QUANTITATIVE EVALUATION OF FORMATION PERMEABILITY FROM ACOUSTIC AND ELECTRIC STONELEY WAVES." International Journal of Applied Mechanics 02, no. 03 (2010): 585–615. http://dx.doi.org/10.1142/s1758825110000676.

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Numerical experiments based on Pride's model of electrokinetic phenomena have shown that electromagnetic Stoneley waves as well as pressure Stoneley waves are most sensitive to permeability variations. A new way for quantitative evaluation of any value of formation permeability is presented. It is based on simultaneous measurement of pressure field and axial component of electric field excited by an acoustic source in fluid-filled borehole with help from a set of receivers in borehole. Frequency dependence of ratio of the complex-valued amplitudes of the electric Stoneley wave to the pressure
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Dissertations / Theses on the topic "Electric waves Measurement"

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Matandirotya, Electdom. "Measurement and modelling of geomagnetically induced currents (GIC) in power lines." Thesis, Cape Peninsula University of Technology, 2016. http://hdl.handle.net/20.500.11838/2459.

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Thesis (DTech (Electrical Engineering))--Cape Peninsula University of Technology, 2016.<br>Geomagnetically induced currents (GIC) are currents induced in ground-based conductor networks in the Earth's surface. The GIC are driven by an electric eld induced by geomagnetic variations which are a result of time-varying magnetospheric-ionospheric currents during adverse space weather events. Several studies have shown that there is a likelihood of technological damage (the power grid) in the mid- and low-latitude regions that could be linked to GIC during some geomagnetic storms over the past
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Chowdhury, Rehana Momtaz Engineering &amp Information Technology Australian Defence Force Academy UNSW. "Use of Higher Order Harmonics from a Limiter to Improve the Single-Tone Detection Performance of an Envelope Detector." Awarded by:University of New South Wales - Australian Defence Force Academy. Engineering & Information Technology, 2009. http://handle.unsw.edu.au/1959.4/43512.

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The limiter is a commonly used device in communication receiving systems to remove the amplitude variations of the received signal, but it is usually observed that limiter degrades the envelope detection performance of a single tone. In this thesis, it is demonstrated that the limiter-generated third harmonic can be used to improve the envelope detection performance of a single tone over that of the linearly processed fundamental. Differences in the probability distributions of the limiter-generated harmonics cause differences in their detection probabilities, which lead to differences in
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Huang, Liling. "Electromechanical Wave Propagation in Large Electric Power Systems." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11054.

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In a large and dense power network, the transmission lines, the generators and the loads are considered to be continuous functions of space. The continuum technique provides a macro-scale analytical tool to gain an insight into the mechanisms by which the disturbances initiated by faults and other random events propagate in the continuum. This dissertation presents one-dimensional and two-dimensional discrete models to illustrate the propagation of electromechanical waves in a continuum system. The more realistic simulations of the non-uniform distribution of generators and boundary conditions
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Matos, Carmen. "Robotically Controlled Measurement System for Millimeter-Wave Antennas." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1588180162492972.

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Friedlander, Jeffrey B. "Wireless Strain Measurement with Surface Acoustic Wave Sensors." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306874020.

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Hamrita, Takoi K. "On-line digital signal processing methods for the correction of errors in high voltage power waveform measurements." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/15921.

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Boykov, Nikolay D. "Measurements of the electrical properties of coal measure rocks." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4715.

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Thesis (M.S.)--West Virginia University, 2006.<br>Title from document title page. Document formatted into pages; contains xi, 89 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 88-89).
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Nordin, Daniel. "Optical frequency modulated continuous wave (FMCW) range and velocity measurements." Doctoral thesis, Luleå, 2004. http://epubl.luth.se/1402-1544/2004/43.

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Danielson, James Robert. "Measurement of Landau damping of electron plasma waves in the linear and trapping regimes /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC IP addresses, 2002. http://wwwlib.umi.com/cr/ucsd/fullcit?p3044767.

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Goldberg, Benjamin M. "Electric Field Measurements in Non-Equilibrium ElectricDischarge Plasmas Using Picosecond Four-Wave Mixing." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449236861.

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Books on the topic "Electric waves Measurement"

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Seminar on Digital Methods in Waveform Metrology (1983 Gaithersburg, Md.). Digital Methods in Waveform Metrology: Proceedings of the Seminar on Digital Methods in Waveform Metrology, held at the National Bureau of Standards, Gaithersburg, MD., October 18 and 19, 1983. Edited by Bell B. A. U.S. Dept. of Commerce, National Bureau of Standards, 1985.

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Koepke, Galen H. Theory and measurements of radiated emissions using a TEM cell. U.S. Dept. of Commerce, National Institute of Standards and Technology, 1989.

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Hafner, Christian. The 3D electrodynamic wave simulator: 3D MMP softwareand user's guide. Wiley, 1993.

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Protasevich, E. T. Novye i︠a︡vlenii︠a︡ v fizike gazovogo razri︠a︡da i radiofizike. Izd-vo Tomsk. politekhn. universiteta, 2002.

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University, Tomsk Polytechnic, ed. Novye i︠a︡vlenii︠a︡ v fizike gazovogo razri︠a︡da i radiofizike. Izd-vo Tomsk. politekhn. universiteta, 2002.

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Hitchcock, R. Timothy. Extremely low frequency (ELF) electric and magnetic fields \. AIHA, 1995.

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Kočiš, Štefan. Ultrasonic measurements and technologies. Chapman & Hall, 1996.

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Balaberda, Randolph Francis. Radiation pattern measurements of a tranline antenna on a scale model of the CH-135 Bell Helicopter. National Research Council Canada, Division of Electrical Engineering, 1986.

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DeMinco, N. Free-field measurements of the electrical properties of soil using the surface wave propagation between two monopole antennas. U.S. Department of Commerce, National Telecommunications and Information Administration, 2012.

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service), SpringerLink (Online, ed. Beam-Wave Interaction in Periodic and Quasi-Periodic Structures. Springer-Verlag Berlin Heidelberg, 2011.

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Book chapters on the topic "Electric waves Measurement"

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Gerlich, Stefan, Yaakov Y. Fein, Armin Shayeghi, Valentin Köhler, Marcel Mayor, and Markus Arndt. "Otto Stern’s Legacy in Quantum Optics: Matter Waves and Deflectometry." In Molecular Beams in Physics and Chemistry. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63963-1_24.

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AbstractOtto Stern became famous for molecular beam physics, matter-wave research and the discovery of the electron spin, with his work guiding several generations of physicists and chemists. Here we discuss how his legacy has inspired the realization of universal interferometers, which prepare matter waves from atomic, molecular, cluster or eventually nanoparticle beams. Such universal interferometers have proven to be sensitive tools for quantum-assisted force measurements, building on Stern’s pioneering work on electric and magnetic deflectometry. The controlled shift and dephasing of inter
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Su, Yun, Xia Wang, Qingxue Liu, et al. "Research and Simulation on Fault Location of Multi Branch Distribution Network Based on Micro PMU." In Lecture Notes in Electrical Engineering. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-96-4856-6_3.

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Abstract The research on fast and accurate fault location technology in distribution networks is of great significance. Currently, many methods for fault location in distribution networks have been proposed, but most theories are difficult to solve the problem of fault location in multi branch distribution networks. Therefore, this paper analyzed the characteristics of traveling wave transmission and proposed a discrimination algorithm that uses the polarity of traveling waves to determine the source of fault traveling waves; Then, using the idea of first locating the fault section and then lo
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Rüeger, J. M. "Propagation of Electromagnetic Waves Through the Atmosphere." In Electronic Distance Measurement. Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80233-1_5.

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Rüeger, J. M. "Propagation of Electromagnetic Waves Through the Atmosphere." In Electronic Distance Measurement. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-97196-9_5.

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Kani, K., T. Yamada, and M. Abe. "Hugoniot and Electric Resistivity Measurements on Amorphous Se." In Shock Waves in Condensed Matter. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2207-8_68.

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Wang, S., J. P. Cui, B. C. Fan, et al. "Measurement of electron density profile behind strong shock waves with a Langmuir probe." In Shock Waves. Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-27009-6_39.

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Garrett, Steven L. "One-Dimensional Propagation." In Understanding Acoustics. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44787-8_10.

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Abstract Having already invested in understanding both the equation of state and the hydrodynamic equations, only straightforward algebraic manipulations will be required to derive the wave equation, justify its solutions, calculate the speed of sound in fluids, and derive the expressions for acoustic intensity and the acoustic kinetic and potential energy densities of sound waves. The “machinery” developed to describe waves on strings will be sufficient to describe one-dimensional sound propagation in fluids, even though the waves on the string were transverse and the one-dimensional waves in
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Hamilton, D. C., A. C. Mitchell, and W. J. Nellis. "Electrical Conductivity Measurements in Shock Compressed Liquid Nitrogen." In Shock Waves in Condensed Matter. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4613-2207-8_67.

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Takada, Tatsuo, Hanwen Ren, Jin Li, Weiwang Wang, Xiangrong Chen, and Qingmin Li. "Generation of Pulse Pressure Wave." In Electric Charge Accumulation in Dielectrics: Measurement and Analysis. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-6156-4_9.

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Yamada, T., and M. Matsui. "Measurement of Electron Density by Heterodyne Interferometer for Atmospheric Pressure Plasmas." In 31st International Symposium on Shock Waves 1. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-91020-8_62.

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Conference papers on the topic "Electric waves Measurement"

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Yong, Fuyou, and Yang Yang. "Electric Field Measurement Method Based on Rydberg Atom." In 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2024. http://dx.doi.org/10.1109/irmmw-thz60956.2024.10697822.

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Fuse, Norikazu, Atushi Naganuma, Tetsuo Fukuchi, Yasuhiko Hori, Maya Mizuno, and Kaori Fukunaga. "Analysis of Paint Integrity and Underfilm Corrosion of Transmission Tower Cross-arms Using Electrochemical Impedance Spectroscopy and Terahertz Imaging." In CORROSION 2015. NACE International, 2015. https://doi.org/10.5006/c2015-05533.

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Abstract Bidimensional analysis of paint degradation and steel corrosion was carried out on cross-arms used in an electric transmission tower on the Pacific coast of Japan by electrochemical impedance and terahertz wave measurements. Visual observation indicates that underfilm corrosion is intense on the surfaces facing the sea breeze. Electrochemical impedance shows that paint degradation is severe in materials installed at large height. However, the impedance measurement at times indicates good electrical insulating values even when the presence of underfilm corrosion is indicated by teraher
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Tominaga, Yoriko, Fumitaro Ishikawa, Noriaki Ikenaga, and Osamu Ueda. "Low-temperature-grown dilute bismide III-V compound semiconductors towards fabrication of photoconductive antenna for terahertz-wave emission and detection." In JSAP-Optica Joint Symposia. Optica Publishing Group, 2024. https://doi.org/10.1364/jsapo.2024.18p_b2_10.

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Towards the 6th generation mobile communications system (6G), it is considered to expand a frequency band higher than that for 5G, 95 GHz–3 THz, and electromagnetic waves up to approximately 300 GHz are under consideration[1]. Therefore, developing and realizing devices that can operate in these frequency bands is an urgent issue. It is essential to elucidate the dielectric, magnetic, and electrical properties of semiconductors and other electronic materials, which constitute the development and manufacturing processes, in these frequency bands. It is said that 6G will be in operation in 2030,
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Wan, Zhiqian, Yin Lin, Xiaozhang Chen, and Yunqi Fu. "Design of Frequency Tunable Electric Field Local Enhancement Structure for Quantum Microwave Measurements." In 2024 International Conference on Microwave and Millimeter Wave Technology (ICMMT). IEEE, 2024. http://dx.doi.org/10.1109/icmmt61774.2024.10672255.

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Mai, Chia-Ming, and Shang-Hua Yang. "An Onsite Calibration Procedure for Accurate Electrical Constants Measurement with Terahertz Time-Domain Ellipsometry." In 2024 49th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2024. http://dx.doi.org/10.1109/irmmw-thz60956.2024.10697818.

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Dai, Guangbin, Huabin Wang, Guoshuai Geng, et al. "Near-field Terahertz Wave Measurement Based on Intensity and Electric-field Detections." In International Symposium on Ultrafast Phenomena and Terahertz Waves. OSA, 2016. http://dx.doi.org/10.1364/isuptw.2016.iw3b.4.

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Chun, Sejong, Hyu-Sang Kwon, Doo-Sik Park, and Kang-Wook Lee. "Acoustic Measurement of Ultrasound Sensors in a Water Bath." In ASME 2020 Fluids Engineering Division Summer Meeting collocated with the ASME 2020 Heat Transfer Summer Conference and the ASME 2020 18th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/fedsm2020-20046.

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Abstract PMN-PT is one of promising materials for fabrication ultrasound sensors for flow metering, in that the relative permittivity and the dielectric loss factor are superior to PZT, the popular piezoelectric materials at present. However, there are not many studies focusing on characterizing the PMN-PT ultrasound sensors by acoustic measurements. This study introduces an acoustic bath to accommodate a pair of ultrasound sensors for measuring the relative acoustic sensitivity and the dispersion angle by ultrasound waves. Ultrasound sensors with resonance frequencies from 0.2 MHz to 1 MHz ar
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Kumagai, Motohiro, Shigeo Nagano, Shin’Ichiro Hayashi, and Norihiko Sekine. "Electric field measurement for a 320GHz wave by Rydberg-atom based sensor." In 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2023. http://dx.doi.org/10.1109/irmmw-thz57677.2023.10298976.

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Sugiura, Hirokazu, Takuji Kanemura, Sachiko Yoshihashi-Suzuki, et al. "Measurement of Wavy Surface Oscillations on Liquid Metal Lithium Jet for IFMIF Target." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29634.

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This paper reports on the measurement of surface waves on a liquid lithium jet and results of the study of the Li target at the International Fusion Materials Irradiation Facility (IFMIF). The characteristics of the surface waves at the nozzle exit and just downstream of it were examined experimentally, since the initial growth of free surface waves exerts a definite influence on surface behavior in the downstream region. Experiments were carried out using the lithium circulation loop at Osaka University, with a focus on the free surface oscillations. These oscillations were measured using an
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Yamaguchi, Taketo, Yusei Hosokawa, Ryota Tomie, et al. "Electric Potential Mapping Measurement for All-Solid-State Lithium-Ion Batteries using a Terahertz Chemical Microscope." In 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz). IEEE, 2023. http://dx.doi.org/10.1109/irmmw-thz57677.2023.10299081.

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Reports on the topic "Electric waves Measurement"

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Diem, S., P. Efthimion, B. LeBlanc, et al. Te (R,t) Measurements using Electron Bernstein Wave Thermal Emission on NSTX. Office of Scientific and Technical Information (OSTI), 2006. http://dx.doi.org/10.2172/963548.

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Efthimion, P. C., G. Taylor, W. Ernst, et al. One millimeter wave interferometer for the measurement of line integral electron density on TFTR. Office of Scientific and Technical Information (OSTI), 1985. http://dx.doi.org/10.2172/5884179.

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B. Jones, G. Taylor, P.C. Efthimion, and T. Munsat. Measurement of The Magnetic Field in a Spherical Torus Plasma via Electron Bernstein Wave Emission Harmonic Overlap Measurement of The Magnetic Field in a Spherical Torus Plasma via Electron Bernstein Wave Emission Harmonic Overlap. Office of Scientific and Technical Information (OSTI), 2004. http://dx.doi.org/10.2172/821517.

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Howes, Gregory. Final Technical Report for DE-SC0014599 Physics of the Aurora: Laboratory Measurements of Electron Acceleration by Inertial Alfven Waves. Office of Scientific and Technical Information (OSTI), 2023. http://dx.doi.org/10.2172/2251517.

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DeMinco, Nicholas, J. Allen, Chriss Hammerschmidt, Robert Johnk, and Paul McKenna. Free-Field Measurements of the Electrical Properties of Soil Using the Surface Wave Propagation Between Two Monopole Antennas. Institute for Telecommunication Sciences, 2012. https://doi.org/10.70220/zx5wspbw.

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Vargas-Herrera, Hernando, Juan Jose Ospina-Tejeiro, Carlos Alfonso Huertas-Campos, et al. Monetary Policy Report - April de 2021. Banco de la República de Colombia, 2021. http://dx.doi.org/10.32468/inf-pol-mont-eng.tr2-2021.

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1.1 Macroeconomic summary Economic recovery has consistently outperformed the technical staff’s expectations following a steep decline in activity in the second quarter of 2020. At the same time, total and core inflation rates have fallen and remain at low levels, suggesting that a significant element of the reactivation of Colombia’s economy has been related to recovery in potential GDP. This would support the technical staff’s diagnosis of weak aggregate demand and ample excess capacity. The most recently available data on 2020 growth suggests a contraction in economic activity of 6.8%, lowe
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