Radio noises associated with earthquakes became a big current topics especially after the big disaster of Kobe Earthquakes, and quite a few researchers in various fields in Japan began to pay their attention on this subject, and during these two years we have a lot of symposiums. The main interest for the researchers is if it is possible to predict the occurrence of earthquakes by detecting the emitted electromagnetic signals as a precursor of earthquakes to prevent the disaster. Some of the researchers insisted that there is no electromagnetic emissions as a precursor of earthquakes, and active controversies are going on.
The operation of lightning monitoring system is another attractive subject. Electromagnetic waves associated with lightning discharges are useful to locate the positions of lightning strikes. The basic concepts for these operational system are the magnetic direction finding, time of arrival, and interferometer. These operational systems own both advantages and disadvantages, and the attempts to improve the location accuracy have been conducted eagerly. Since the choice of these systems depends on the objective of the researchers, we had better operate the most propers system for one's purpose.
On the other hand one of the most interesting subjects, which are related to Man-made Noise, is the problem of the electromagnetic wave emissions by the power electronics devices. Since such kind of electromagnetic noises occasionally cause the miss operating the electronics systems, the efforts to eliminate unexpected electromagnetic waves emission have been done such as the application of soft switching for inverter.
Followings are the review and brief summaries.
Ushio et al. [1994] reported a highly synchronized multipoint measurement of lightning electric field changes, combining the function of traditional slow antenna systems with techniques of the time of arrival and locating successfully the micro-second scale pulses superimposed in the lightning-caused electric field changes.
Hussein et al. [1995] present successful simultaneous measurements of significant parameters for lightning strikes to the Canadian National (CN) Tower in Toronto, which have been performed since the summer of 1991. Three 10-bit 10-ns computer-controlled double-channel digitizers, with long segmented memory, have simultaneously captured the current derivative at the CN Tower and the corresponding electric and magnetic fields 2.0 km north of the tower. Lightning flashes to the tower were videotaped from two mutually perpendicular directions for the purpose of constructing a three-dimensional image of the lightning path. Furthermore, the return stroke velocity, a parameter also needed for the analysis of lightning radiation models, has been measured by a computer-controlled photodiode system. In this paper all relevant parameters for a CN Tower lightning stroke, observed on August 17, 1991, are shown and analyzed.
Wang et al. [1995] resolved in time and space the luminous propagation of lightning attachment to the CN tower, using an eight-channel photodiode system. Approximately 60 lightning discharges were recorded during 1991 and 1992. Positive correlations are found among the return stroke velocity, the leader velocity, and the leader light intensity. However, it also is observed that even in the case of a very tall structure, when a dart leader approaches the CN tower, it is highly possible that no apparent connecting leader is initiated before the ensuing return stroke.
Ohta et al. [1994] found that some very low latitude whistlers propagated in the Earth-ionospheric waveguide over a distance of the order of 1000 km, exhibit very clear additional dispersion effects near the cutoff frequencies of the subionospheric 1st- and 2nd-order modes. The polarization of such dispersive components are found to be identical to those for tweek sferics.
There appeared several review papers on magnetospheric chorus [Sazhin and Hayakawa, 1992], mid-latitude and plasmaspheric hiss [Hayakawa and Sazhin, 1992], aurora VLF hiss [Sazhin et al., 1993], and periodic and quasi-periodic emissions [Sazhin and Hayakawa, 1994].
Takeuchi et al. [1994] clarified the local time dependence of wave characteristics of Pi2 pulsations observed at the synchronous orbit from GOES 5 and 6 during April 1986, and Kozuka et al. [1994] discussed solar cycle variation of the local time dependence in frequency of occurrence of Pi2.
Ondoh and Nakamura [1994] reported magnetospheric VLF waves observed by DE-1, including small scale plasma irregularities in high latitude magnetosphere and impulsive VLF waves, whistler triggered hiss, and VLF chorus in equatorial magnetosphere.
Hattori et al. [1994] reported the results of spectral analyses and direction finding for VLF/ELF data containing simultaneous hiss and chorus, and, Yamaguchi et al. [1994] proposed a new direction finding method of magnetospheric VLF/ELF radio waves using the linear regularization and generalized cross validation.
Hayakawa et al. [1995] have proposed a new method of estimating the propagation distance and ionospheric reflection height by using the dispersive tail of tweek sferics. Also, the field-analysis direction finding was applied to tweek sferics to understand their propagation mechanism.
Maeda [1994] reported the geometrical beam modeling of a component of Jovian Io-related decametric radiation (so-called Io-B) based on the 22.2 MHz occurrence probability data from University of Texas Radio Astronomy Observatory. By fitting the simulated longitude-difference drift curve to the observation, the best fit lead angle and cone half-angle are estimated to be about 40 degree and 65 degree respectively.
Makino [1994] gave an overview of updated observations with X-ray astronomy satellite "GINGA", covering notable results: 1. detection of X-ray from SN1987A; 2. discovery of new X-ray pulsars; 3. discovery of new black hole candidates; 4. detection of ionization from galactic center, 5. correlated X-ray emission from 3C279; and 6. spectral features and variabilities of Seyfert galaxies.
Researches on EMC by Masaru Ishii and his group is focused on lightning EMP. Measurement of vertical electric field by slow and fast antennas, and observation of VHF radiation at multiple points are performed for 3-D location of the charges and radiation sources of lightning in winter in Japan. Continuous observation of lightning on Java Island, Indonesia has been carried out by a magnetic direction finding system equipped with GPS clocks.
Koji Michishita and Masaru Ishii are cooperating in the research of the lightning-induced voltage on overhead lines in both aspects of theory and observation. Model experiments have been successfully carried out to verify the coupling model and the numerical model. An experimental distribution line of full size has been installed adjacent to a tall stack equipped with a lightning-current measuring device, and induced voltages and horizontal electric fields have been observed during winter. In winter, the tall stack is struck by lightning more than ten times a season. The horizontal electric field is observed by sensors developed by this research group. The objective of this experiment is the verification of the theory by using natural lightning, and is carried out in cooperation with an electric power utility and the Central Research Institute of Power Industry.
Radio emissions associated with earthquakes received a growing interest in different countries and an international workshop on this topic was held in Japan in 1993 and its Proceedings [Hayakawa and Fujinawa, 1994] was published containing several topics: 1. electromagnetic AC emissions associated with earthquakes and volcanic eruptions (ground observations); 2. electric and magnetic field variations (DC) and related phenomena, 3. satellite observations of seismogenic phenomena, perspective methods and future satellite projects; 4. laboratory and field experiments and simulated origin of seismogenic emissions; and 5. underlying mechanisms and theoretical models.
The observation of the ELF, VLF, LF and MF frequency bands emissions related earthquakes and volcanic eruptions and the physical investigation about the source radiation and the energy transmission mechanisms through underground.
The study of lower latitude whistlers is continuing. Based on spaced direction finding observations in south China, it was found that there exists a very favorable propagation channel and that this propagation may be associated with the propagation trapped by filamentary field aligned irregularities [Hayakawa et al., 1994].
Kawasaki et al. [1994] make a report on SAFIR (Surveillance et d'Alerte Foudre par Interfermetrie Radioelectrique) which has been equipped and operated in Japan since June 12th, 1991 as a cooperative project among Osaka University, Kansai Electric Power Co. INC. (KEPCO), and the French manufacturer DIMENSIONS. The operational coverage covers Northern Kinki District, Wakasa District, and Hokuriku District. Hokuriku District is well known for its winter thunderstorm activity. The method for the evaluation was to take the cross-correlation between the meteorological radar echo pattern and the distribution pattern of lightning discharges detected by SAFIR. They obtained high cross-correlation coefficients and concluded that the SAFIR locations were shown to have statistically high accuracy. They also show the case study of the occurrence of the lightning strike, which is recorded by KEPCO, to evaluate the usefulness of the warning by SAFIR.
From the viewpoint of electronics Systems reliability enhancement, the EMC characteristics, the noise immunity characteristics and the immunity enhancement techniques of electronic components based on the malfunction caused by electromagnetic noise, and the maintenance Strategy for electronics Systems are current topics in this field.
A source ESD model is described for analyzing the transient electromagnetic fields using a spark resistance. Numerical calculation is given to explain the peculiar phenomenon being well-recognized in the ESD event [Fujiwara and Andoh, 1993].
Studies of multiconductor transmission systems, distributed transmission circuit, antennas, communication systems, active transmission lines, magnetics and ferroelectric recording, neural information processing, computer network, satellite communication and electromagnetic compatibility have been also conducted by Sato's group and they have shown the interesting results.
Contents
Commission D ('96)
Commission F ('96)
Commission E ('93)
Commission E ('99)
Akiyama, Y., T. Ideguchi, M. Tokuda, and N. Kuwabara, Evaluation of RF immunity test facilities based on the scattered field of a conductive sphere, to be published on Trans. IEICE, J78-B-II (in Japanese) (1996)
Amemiya, F., N. Kuwabara, and T. Ideguchi, Estimation of electromagnetic interference field emitted from telecommunication line, IEICE Trans. Commun., E78-B-II, 2, 159-167 (1995)
Amemiya, F., N. Kuwabara, and T. Ideguchi, Estimation of electromagnetic interference filed emitted from telecommunication line, IEICE Trans. Commun., E78-B, 2, 159-167 (1995)
Aoyagi, T., and Y. Shimizu, Designing multi-layer wave-absorber for oblique incident by point frequency matching method, International Symposium on Electromagnetic Compatibility, 19A201, 491-494 (1994)
Baba, K., and M. Hayakawa, Finite element method calculation of VLF propagation characteristics in the earth-ionosphere waveguide, Trans. IEICE, J76-B-II, 4, 236-244 (in Japanese) (1993)
Baba, K., and T. Takagi, Time domain spectroscopy for electrical properties of biological substances, URSI General Assembly, Kyoto (1993)
Baba, K., and T. Takagi, A broad-band time-domain spectroscopy for biological study of electromagnetic absorption, Proc. of the Instrumentation and Measurement Technology Conference TUPM 8-5 (IMTC '94) (1994)
Baba, K., K. Ohta, and M. Hayakawa, Propagation characteristics of tweek atmospherics below anisotropic and inhomogeneous ionosphere models, Trans. IEICE, J76-B-II, 1, 11-19 (in Japanese) (1993)
Baba, K., N. Kuramata, and T. Takagi, Time domain reflectometry for EMC, IMTC '94 (1994)
Chen, Q., K. Sawaya, S. Adachi, H. Ochi, and E. Yamamoto, Analysis of MRI slotted tube resonator having a shield of conducting circular cylinder, IEICE Trans. Commun., E76-B, 5, 553-560 (1993)
Chen, Q., K. Sawaya, T. Uno, S. Adachi, H. Ochi, and E. Yamamoto, A three dimensional analysis of slotted tube resonator for MRI, IEEE Trans. Medical Imaging, 13, 4, 587-593 (1994)
Chen, Q., K. Sawaya, T. Uno, S. Adachi, H. Ochi, and E. Yamamoto, Numerical analysis of MRI slotted tube resonator loaded by a dielectric body, Proc. Int. Symp. Electromagnetic Compatibility, 573-574 (1994)
Echigo, H., and R. Sato, Induced voltages on linear antenna excited by impulsive transient waves, Abstracts for XXIVth General Assembly of the URSI, ED-6, 598 (1993)
Echigo, H., R. Sato, and K. Mitsui, An observation of EM environments at indoor spaces, Technical Report of IEICE, EMCJ92-43, 7-12 (1992)
Echigo, H., N. Takeda, R. Sato, and K. Mitsui, Tests on wide band antenna for the measurement of EM environments, Proceedings of the 1993 IEICE Spring Conference, part 2, SB-3-6, 2-647 (1993)
Fujiwara, O., and N. Andoh, Analysis of transient electromagnetic fields radiated by electrostatic discharges, IEICE Trans. Commun., E76-B, 11, 1478-1480 (1993)
Fujiwara, O., and H. Endoh, Computation of potential attenuation process for charged human body using numerical inverse Laplace transform, IEICE Trans. Commun., E78-B, 2, 188-192 (1995)
Fujiwara, O., and K. Iino, Usefulness of spherical model of human head in SAR calculation for UHF plane-wave exposure, IEICE Trans. Commun., E76-B, 5, 561-564 (1993)
Fujiwara, O., and A. Kato, Computation of SAR inside eyeball for 1.5-GHz microwave exposure using finite-difference time-domain technique, IEICE Trans. Commun., E77-B, 6, 732-737 (1994)
Fujiwara, O., and M. Nomura, Correlation between spatial distributions of surface-SAR and magnetic near-field in realistic head model for microwave exposure, IEICE Trans. Commun., E76-B, 7, 765-767 (1993)
Fujiwara, O., and M. Nomura, Approximation of surface-SAR in a realistic head model for microwave exposure using external magnetic near-field, IEICE Trans. Commun., E78-B, 2, 140-144 (1995)
Fujiwara, O., and K. Takamoto, High frequency impedance of wire caused by mounting ferrite core, Trans. IEICE, J78-B-II, 4, 265-266 (in Japanese) (1995)
Furuta, K., A. Haga, K. Ohnuma, and R. Sato, Measurements of ELF, VLF magnetic emission from VDTs, Tech. on Magnetics, IEE Japan, MAG-94-147, 11-17 (1994)
Gyoda, K., A. Nishikata, T. Shinozuka, and A. Sugiura, Evaluation of antenna factor of biconical antenna for EMC measurements, IEICE Trans. Commun., E78-B, 2, 268-272 (1995)
Harima, K., A. Sugiura, T. Morikawa, and R. Hayashi, Applicability of the standard site method for determining antenna factors, Trans. IEICE, J76-B-2, 837-840 (in Japanese) (1993)
Hattori, K., M. Hayakawa, D. Lagoutte, M. Parrot, and F. Lefeuvre, The experimental results of triggering chorus emissions from monochromatic wave components in the hiss band in the outer magnetosphere, Dusty and Dirty Plasmas, Noise and Chaos in Space and in the Laboratory, New York, Plenum Press, 395 (1994)
Hayakawa, M., VLF/ELF radio noise in the inner plasmasphere, Trends in Geophys. Res., 2, 211 (1993)
Hayakawa, M., Study of generation mechanisms of magnetospheric VLF/ELF emissions based on the direction findings, Proc. NIPR Symp. Upper Atmos. Phys., 6, 117-133 (1993)
Hayakawa, M., Association of whistlers with lightning discharge on the Earth and on Jupiter, J. Atmos. Terr. Phys., 57, 5, 525-535 (1995)
Hayakawa, M., and Y. Fujinawa (Editors), Electromagnetic phenomena related to earthquake prediction, Terra Sci. Pub. Comp., Tokyo, 667 (1994)
Hayakawa, M., I. Tomizawa, K. Ohta, S. Shimakura, Y. Fujinawa, K. Takahashi and T. Yoshino, Direction finding of precursory radio emissions associated with earthquakes: a proposal, Res. Lett. on Atmos. Electr., 12, 3, 211-224 (1992)
Hayakawa, M., T. Yoshino, and V. A. Morgounov, Low-latitude magnetospheric whistlers and earthquakes, Res. Lett. on Atmos. Electr., 12, 3, 253-273 (1992)
Hayakawa, M., I. Tomizawa, K. Ohta, S. Shimakura, Y. Fujinawa, K. Takahashi and T. Yoshino, Direction finding of precursory radio emissions associated with earthquakes: a proposal, Phys. of the Earth and Planetary Interiors, 77, 127-135 (1993)
Hayakawa, M., T. Yoshino, and V. A. Morgounov, On the possible influence of seismic activity on the propagation of magnetospheric whistlers at low latitudes, Phys. of the Earth and Planetary Interiors, 77, 97-108 (1993)
Hayakawa, M., K. Ohta, and K. Baba, Wave characteristics of tweek atmospherics deduced from the direction-finding measurement and theoretical interpretation, J. Geophys. Res., 99, D5, 10733-10743 (1994)
Hayakawa, M., K. Ohta, S. Shimakura, and K. Baba, Recent findings on VLF/ELF sferics, J. Atmos. Terr. Phys., 57, 5, 467-477 (1995)
Hayakawa, M., K. Ohta, and S. Shimakura, Recent findings on the propagation of low latitude whistlers, J. Atmos. Terr. Phys., 57, 5, 485-492 (1995)
Hirai, Y., Y. Hashimoto, A. Kisuki, K. Ishino, and Y. Shimizu, Double layer ferrite absorber specially designed for lined anechic chamber for EMI/EMS testing, International Symposium on Electromagnetic Compatibility, 19A204, 501-504 (1994)
Hirari, M., and M. Hayakawa, Simulation study on ground-based direction finding of VLF/ELF radio waves by wave distribution functions: a Bayesian approach, IEICE Trans. Commun., E78-B, 6, 923-931 (1995)
Honma, N., H. Komuro, M. Ishii, and J. Hojo, Improvement of a magnetic direction-finder network in the Tohoku district, Trans. IEE of Japan, 114-B, 4, 419-424 (in Japanese) (1994)
Horii, K., S. Sumi, K. Nakamura, M. Yoda, Z.-I. Kawasaki, K. T. Sirait, and A. M. Sunoto, Experiment of triggered lightning with rocket in Indonesia; stroke to a lightning conductor, Trans. IEE of Japan, 113-B, 10, 1172-1173 (1993)
Hsu, H., S. Nitta, Y. Kuwabara, and N. Yokotsuka, The influence of heatsink on noise immunity of ICS, Ditto, 622-625 (1994)
Hussein, A. M., W. Janischewskyj, J.-S. Chang, V. Shostak, W. A. Chisholm, P. Dzurevych, and Z.-I. Kawasaki, Simultaneous measurement of lightning parameters for strokes to the Toronto Canadian National Tower, J. Geophys. Res., 100, D5, 8853-8861 (1995)
Ideguchi, T., M. Hattori, and M. Tokuda, Radio-frequency conductive immunity test circuit improving low frequency voltage feeding characteristics, Trans. IEICE, J75-B-II, 12964-12971 (in Japanese) (1992)
Ideguchi, T., M. Hattori, and F. Ootsuki, A method to estimate normal mode noise voltage induced on indoor telecommunication lines due to adjacent AC supply lines, Trans. IEICE, J76-B-II, 10, 827-833 (in Japanese) (1993)
Imai, Y., K. Michishita, M. Ishii, and T. Kawamura, Analysis of lightning-induced voltages on multiconductor power distribution lines taking account of finite ground conductivity, Trans. IEE of Japan, 113-B, 5, 499-508 (in Japanese) (1993)
Ishida, H., H. Sugimoto, H. Sone, and T. Takagi, An experiment on the dependency of contact opening velocity on arc phenomena of slowly opening Ag and Pd contact, ICEC '94 (1994)
Ishii, M., K. Michishita, Y. Hongo, and S. Oguma, Lightning-induced voltage on an overhead wire dependent on ground conductivity, IEEE Trans. on Power Delivery, 1, PWRD-9, 1, 109-118 (1994)
Ishino, K., T. Morikawa, T. Saito, Y. Hashimoto, and Y. Shimizu, Realization of compact semi- and fully anechoic chambers using a new developed composite absorber, 1994 EMC Symposium, Chicago, 413-418 (1994)
Ito, H., Y. Hashimoto, K. Ishino, K. Shiramizu, H. Kojima, and Y. Shimizu, Investigation on oblique incident characteristics of ferrite absorbing panels for TV ghost suppression, Zuruch EMC '93, 88M7, 475-480 (1993)
Iwama, N., M. Yamaguchi, K. Hattori, and M. Hayakawa, GCV-aided linear reconstruction of the wave distribution function for the ground-based direction finding of magnetospheric VLF/ELF waves, J. Electromagnetic Waves and Applications, 9, 5/6, 757-782 (1995)
Karasawa, T., and S. Nitta, Approximate analysis of the harmonic content of electromagnetic noise radiated from RF induction heating apparatus, Proc. of 11th Int'l Zurich Symp. on Electromagnetic Compatibility 14C5, March 1995, Switzerland, 73-76 (1995)
Kawada, M., Z.-I. Kawasaki, K. Matsu-ura, and M. Kawasaki, Non-contact detection of electromagnetic noise occurrence due to partial discharges by spatial phase difference method, Trans. IEE of Japan, 115-B, 10, 1168-1173 (1995)
Kawamata, K., S. Minegishi, A. Haga, and R. Sato, Measurement of sudden voltage transients using coupled transmission lines, Technical Report of IEICE, EMCJ-94-326, 43-47 (1994)
Kawasaki, Z.-I., and V. Mazur, Common physical processes in natural and triggered lightning in winter storms in Japan, J. of Geophys. Res., 97, D12, 12935-12945 (1992)
Kawasaki, Z.-I., K. Yamamoto, K. Matsuura, P. Richard, T. Matsui, Y. Sonoi and N. Shimokura, SAFIR operation and evaluation of its performance, Geophys. Res. Lett., 21, 12, 1133-1136 (1994)
Kuwabara, N., K. Tajima, R. Kobayashi, and F. Amemiya, Development and analysis of electric field sensor using LiNbO3 optical modulator, IEEE Trans. on EMC, 34, 4 391-396 (1992)
Maeda, Y., K. Murakawa, H. Yamane, and M. Tokuda, Technique for estimating electromagnetic field distribution in and around buildings using wire-grid approximation, to be published on the IEICE Trans. Commun.
Maehara, Y., and S. Nitta, Optimum power failure detector, Proc. of First Beijing Int'l Conf. on Reliability, Maintenability & Safety, Oct. 1992, Beijing, China, 388-393 (1992)
Maehara, Y., and S. Nitta, Transient response of CMRR in guard shielded isolation amplifier, Trans. of IEE. J, 115C 1 (1995)
Masugi, M., K. Takagi, M. Sato, F. Amemiya, and M. Tokuda, Proposal of an electromagnetic environmental monitoring system that interlocks with malfunctions, Trans. IEICE, J76-B-II, 2, 121-129 (1993)
Masugi, M., R. Kobayashi, N. Kuwabara, and M. Tokuda, Measurement of electromagnetic pulses due to electrostatic discharges by an electric field sensor using an optical modulator, Trans. IEICE, J76-B-II, 6, 530-537 (1993)
Masugi, M., K. Takagi, M. Satoh, and T. Ideguchi, Electromagnetic environment measurement system employing frequency level selective process, Trans. IEICE, J77-B-II, 9, 496-505 (in Japanese) (1994)
Michishita, K., M. Ishii, and J. Hojo, Evaluation of the measurement by a horizontal electric field sensor, Trans. IEE of Japan, 112-B, 12, 1155-1156 (1992)
Michishita, K., M. Ishii, and Y. Hongo, Experiment of lightning-induced voltage on an overhead wire, Trans. IEE of Japan, 114-B, 9, 859-865 (in Japanese) (1994)
Michishita, K., M. Ishii, and Y. Hongo, Experiment on effect of ground conductivity on lightning induced voltage waveforms on an overhead wire influenced by inclined return stroke channel with a reduced-scale model, Proc. 5th Conf. of Power & Energy Society of IEE of Japan, Tokyo, Session 1-J, 215-220 (in Japanese) (1994)
Minegishi, S., H. Echigo, and R. Sato, Drop in current caused by interrupting current on a transmission line terminated in its characteristics impedance, Technical Report of IEICE, EMCJ-92-253, 1-6 (1992)
Minegishi, S., H. Echigo, and R. Sato, A measurement of current transient process due to opening electric contacts using a distributed constant line system, Technical Report of IEICE, EMD-92-96, 7-12 (1993)
Miura, S., M. Okazaki, and O. Fujiwara, Measurement of human-body potential electrified by stepping on a metal plate, Trans. IEICE, J76-C-II, 4, 156-158 (in Japanese) (1993)
Miyake, Y., M. Ishii, T. Kawamura, and N. Honma, On the site errors of a wide band magnetic direction finder, Proc. 5th Annual Conf. of Power & Energy Society of IEE of Japan, Tokyo, Session 1-E, 143-148 (1994)
Miyashita, T. et al., Prediction of peak frequencies on electromagnetic emission from a signal line on a printed circuit board, IEICE Trans. Commun., E78-B, 2, 181-187 (1995)
Molchanov, O. A., A. P. Nickolaenko, V. A. Rafalsky, A. Yu. Schecotov, and M. Hayakawa, Influence of layered structure of the lower ionosphere on nonmonotonic spectrum behavior of ELF atmospheric noise, Geophys. Res. Lett., 24, 2467-2470 (1994)
Molchanov, O. A., M. Hayakawa, and V. A. Rafalsky, Penetration characteristics of electromagnetic emissions from an underground seismic source into the atmosphere, ionosphere, and magnetosphere, J. Geophys. Res., 100, 1691-1712 (1995)
Morgounov, V. A., T. Ondoh, and S. Nagai, Anomalous variation of VLF signals associated with strong earthquake (M7.0), Electromagnetic phenomena related to earthquake prediction, 409-428, Terra Sci. Pub., Tokyo (1994)
Morikawa, T., A. Sugiura, K. Koike, and K. Harima, Characteristics of dipole antennas for EMC measurements, in Proceedings of the 1994 Int'l Symp. on EMC (Sendai), 763-766 (1994)
Motomitsu, T., H. Yamane, and M. Hattori, Method of estimating bit error rate due to transverse lightning surge, J77-B-II, 10, 572-580 (in Japanese) (1994)
Motomitsu, T., H. Yamane, M. Hattori, and M. Tokuda, Estimation method for bit error due to lightning surge considering arrester operation, to be published on IEICE Trans. Commun.
Murakawa, K., and N. Kuwabara, Maximum radiated interference field estimation method of electric equipment by using randomly assigned phase terms, Trans. IEICE, J76-B-II, 8, 706-714 (in Japanese) (1993)
Murakawa, K., H. Masuda, M. Masugi, and M. Tokuda, Estimation technique of radiated interference field in actual configurations, Trans. IEICE, J76-B-II, 12, 936-944 (in Japanese) (1993)
Murakawa, K., N. Kuwabara, and T. Ideguti, Spherical dipole antenna using electrical to optical converter, Trans. IEICE, J76-B-II, 12, 699-706 (in Japanese) (1993)
Mutoh, A., and S. Nitta, Analog switches with amplification function and its application to multiplexer, Trans. of SICE 29, 11, Nov. '93, 1251-1260 (1993)
Mutoh, A., S. Nitta, T. Nitta, and M. Kawashima, High frequency characteristics on superconductive wire, Ditto, 626-629 (1994)
Mutoh, A., S. Nitta, H. Suganuma, and K. Miyajima, The relationship between the showering noise waveforms and the supplied voltage to contact, Proc. of 1995 IEEE Int'l Symp. on Electromagnetic Compatibility, Aug. 1995, Atlanta, USA, 590-595 (1995)
Nagai, K., K. Ohta, Y. Hobara, and M. Hayakawa, Transmission characteristics of VLF/ELF radio waves through the Jovian ionosphere, Geophys. Res. Lett., 20, 22, 2435-2438 (1993)
Nagao, H., A. Nishikata, and Y. Shimizu, Approximation and accuracy of shielding effectiveness calculated by sheet resistivity, International Symposium on Electromagnetic Compatibility, 17P502, 104-107 (1994)
Nickolaenko, A. P., V. A. Rafalsky, A. V. Shvets, and M. Hayakawa, A time domain direction finding technique for locating wideband ELF-VLF atmospherics, J. Atmos. Electr., 14, 97-107 (1994)
Nishikata, A., S. Kiener, M. Otsubo, T. Shinozuka, and A. Sugiura, A rigorous analysis of test method of EM-shielding materials, J. CRL, 40, 73-87 (1993)
Nitta, S., Roles and problems of LISN in noise measurement, IEICE Trans. Commun., E78-B, 2, 109-119 (1995)
Nitta, S., and Li Fang Wang, Decision method of the number of spare parts and maintenance engineers in service center, Proc. of First Beijing Int'l Conf. on Reliability, Maintenability & Safety, Oct. 1992, Beijing, China, 109-114 (1992)
Nitta, S., A. Mutoh, and K. Ogasawara, The noise induced on the wiring installed on the frame due to ground potential variation, Proc. of Int'l Symp. on Electromagnetic Compatibility, May 1994, Sendai, Japan, 124-127 (1994)
Nitta, S., M. Tokihisa, M. Sato, and T. Nakajima, The relationship between the human factor on maintenance operation and the availability, Proc. of Second Int'l Conf. on Reliability, Maintenability and Safety, Jun. 1994, Beijing, China, 108-113 (1994)
Nomura, M., and O. Fujiwara, Tissue structure dependence of surface-SAR in a human head for microwave far-field exposure, Trans. IEEJ, 116-C, 1 (to be published) (1996)
Ochi, H., E. Yamamoto, K. Sawaya, and S. Adachi, Analysis of MRI antenna inside an RF shield, Trans. IEICE, J76-B-II, 2, 79-85 (in Japanese) (1993)
Ohta, K., A. Shimizu, and M. Hayakawa, The effect of subionospheric propagation on whistlers as deduced from direction finding measurements, Geophys. Res. Lett., 21, 2, 89-92 (1994)
Ohta, K., A. Shimizu, M. Hayakawa, and S. Shimakura, Very low latitude whistlers with effect of the earth-ionosphere waveguide propagation, Trans. IEICE, J77-B-II, 8, 437-444 (in Japanese) (1994)
Omid, M., and M. Hayakawa, Excitation of electromagnetic waves by delta function current sheets in the ionospheric plasma, Radio Science, 29, 4, 867-877 (1994)
Ondoh, T., Polar hiss observed by ISIS satellites, Magnetospheric substorms, Geophysical Monograph 64, 387-398, American Geophys. Union (1992)
Ondoh, T., Narrow-band plasmapause hiss observed by ISIS satellites, Radio Science, 28, 4, 629-642 (1993)
Ondoh, T., Observation of LF atmospherics associated with great eruptions of the Izu-Oshima volcanos, Japan in November, 1986, Electromagnetic phenomena related to earthquake prediction, 149-157, Terra Sci. Pub., Tokyo (1994)
Ondoh, T., Narrow-band plasmapause hiss, Adv. Space Res., 7, 10, 223-228 (1995)
Ondoh, T., and Y. Nakamura, Magnetospheric VLF waves observed by DE-1, Dusty and Dirty Plasmas, Noise and Chaos in Space and in the Laboratory, 379-394, Plenum Press, New York (1994)
Ondoh, T., and Y. Nakamura, Characteristics of VLF emissions observed by DE-1 in the equatorial magnetosphere, Adv. Space Res., 17, 10, 99-104 (1995)
Rajhi, A., K. Baba, and T. Takagi, The effect of the tissue relaxation frequency on the coupled EM energy into a biological tissue, IMTC '94 (1994)
Rajhi, A., K. Baba, and T. Takagi, A broad-band time-domain spectroscopy for biological effects of electromagnetic waves, IMTC '94 (1994)
Sato, M., and S. Kuramoto, A study on equivalent impedance of the building columns and girders against the lightning surges, Trans. IEICE, J77-B-II, 3, 149-158 (in Japanese) (1994)
Sato, M., S. Kuramoto, K. Matsuoka, M. Ohta, and K. Takemoto, Design on large circle Rogowski coil for lightning current measurement in the building columns and girders, Trans. IEICE, J76-B-II, 9, 765-772 (in Japanese) (1993)
Sazhin, S. S., and M. Hayakawa, Review paper--Periodic and quasiperiodic VLF emissions, J. of Atmospheric and Terrestrial Physics, 56, 6, 735-753 (1994)
Shinozuka, T., A. Sugiura, and A. Nishikata, Rigorous analysis of a loop antenna system for magnetic interference measurement, IEICE Trans. Commun., E76-B, 20-28 (1993)
Sone, H., and T. Takagi, Recent development of testing system for arcing contacts, IEICE Trans. Electron., E77-C, 10, 1545-1552 (1994)
Sone, H., H. Ishida, H. Sugimoto, and T. Takagi, Relationship of contact resistance to arc duration in Ag contacts, ICEC '94 (1994)
Sone, H., H. Sugimoto, and T. Takagi, A measurement on contact resistance and surface profile of arcing Ag contacts, IECE '94 (1994)
Sonoi, Y., Z.-I. Kawasaki, K. Matuura, T. Matsui, and N. Shimokura, Comparison between lightning observation by SAFIR and meteorological radar echo, Trans. IEE of Japan, 113-B, 9, 987-992 (1993)
Suganuma, H., A. Mutoh, and S. Nitta, Influence of contact's surface conditions change and operating conditions on showing noise waveforms, Proc. of 1994 IEEE Instrumentation and Measurement Technology Conf. May 1994, Hamamatsu, Japan, 36-39 (1994)
Sugimoto, H., H. Sone, and T. Takagi, Relationship between contact resistance to arc duration in Ag contacts, ICEC '94 (1994)
Sugiura, A., T. Shinozuka, and A. Nishikata, Correction factors for the normalized site attenuation, IEEE Trans. on Electromagn. Compat., EMC-34, 4, 461-467 (1992)
Sugiura, A., Y. Ichino, A. Suzuki, and T. Sugiyama, Peak-power measurements of spread-spectrum low-power communication equipment, in Proceedings of the 1994 Int'l Symp. on EMC (Sendai), 755-758 (1994a)
Sugiura, A., T. Morikawa, H. Masuzawa, and T. Tejima, An improved standard site method, in Proceedings of the 1994 IEEE Instrum. and Meas. Tech. Conf. (IMTC/94), 40-43 (1994b)
Sugiura, A., T. Morikawa, T. Tejima, and H. Masuzawa, Antenna factor of EMI dipole antennas, IEICE Trans. Commun., E78-B, 2, 134-139 (1995a)
Sugiura, A., T. Morikawa, K. Koike, and K. Harima, An improvement in the standard site method for accurate antenna calibration, IEICE Trans. Commun., E78-B, 8, 1229-1237 (1995b)
Suzuki, H., and T. Takagi, On the two-Gaussian noise models: the composite noise and the class A noise, IMTC '94 (1994)
Tajima, K., N. Kuwabara, F. Amemiya, and R. Kobayashi, Sensitivity improvement of electric field sensor with LiNbO3 electro-optic crystals by loading inductance, Trans. IEICE, J76-B-II, 6, 538-545 (1993)
Takagi, T., Applications of time domain reflectometry (TDR) to EMC analysis, XXIVth URSI General Assembly, Kyoto (1993)
Takagi, T., Composite noise generator (CNG) as a noise simulator and its application to noise immunity test of digital systems and TV picture, IEICE Trans. Commun., E78-B, 2, 127-133 (1995)
Takahashi, O., K. Ohta, and M. Hayakawa, On the structure of ducts for mid-latitude whistlers and their ionospheric transmission as deduced from the ground-based direction finding, Pure Appl. Geophys. 140, 519-535 (1993)
Tanaka, M., and T. Takagi, Subjective evaluation test of the effects of non-Gaussian noise on TV picture degradation, IMTC '94 (1994)
Tanaka, M., and T. Takagi, Subjective evaluation on TV picture degradation using a composite noise generation (CNG), IMTC '94 (1994)
Tanaka, M., H. Inoue, and T. Takagi, An experimental study on subjective evaluation of TV picture degradation by electromagnetic noise--Opinion tests on still and motion pictures--, IEICE Trans. Commun., E78-B, 2, 168-172 (1995)
Taniguchi, M., I. Akasaki, and T. Takagi, An experimental study on the relationship between contact noise and contact resistance of electrical sliding contacts and observation of contact surface by using digital image signal measuring system, IECE '94 (1994)
Tejima, T., A. Sugiura, H. Masuzawa, and K. Koike, Height dependence of antenna factor of EMI dipole antennas, Trans. IEICE, J78-B-2, 5, 416-418 (in Japanese) (1995)
Tokushige, K., Y. Yamanaka, A. Sugiura, Y. Kamimura, and Y. Shimizu, Measurement and evaluation of electromagnetic environment in the vicinity of high power AM broadcast stations, in Proceedings of the 1994 Int'l Symp. on EMC (Sendai), 651-654 (1994)
Tomizawa, I., and T. Yoshino, Power line radiation over eastern Asia observed by the satellite OHZORA, IEICE Trans. Commun., E76-B, 11, 1456-1469 (1993)
Tomizawa, I., M. Hayakawa, T. Yoshino, K. Ohta, T. Okada, and H. Sakai, Observation of ELF/VLF electromagnetic variations associated with a seismic experimental explosion, Electromagnetic Phenomena Related to Earthquake Prediction (Proceeding Record), 337-347, Terra Sci. Pub., Tokyo, Japan (Dec.1994)
Tomizawa, I., H. Nishida, and T. Yoshino, A new-type source of power line harmonic radiation possibly located on the Kola Peninsula, J. Geomag. Geoelectr., 47, 213-229 (1995)
Trakhtengertsand, V. Y., and M. Hayakawa, A wave-wave interaction in whistler frequency range in space plasma, J. Geophys. Res., 98, A11, 19205-19217 (1993)
Tsugawa, M., S. Takahashi, H. Echigo, and R. Sato, A trial example of simple RF noise source, 1993 Tohoku-Section Joint Convention Record of Institutes of Electrical and Information Engineers, Japan, 2A20, 39 (1993)
Tsugawa, M., H. Echigo, and R. Sato, Spectrum pattern analysis--Extraction of impulsive noise--, Proc. of 1994 International Symposium on EMC(Sendai, Japan), 18A6PS05, 808 (1994)
Tsugawa, M., H. Sato, H. Echigo, and R. Sato, A measurement of UHF band wave propagation through a passway in a building, 1994 Tohoku-Section Joint Convention Record of Institutes of Electrical and Information Engineers, Japan, 2I24, 342 (1994)
Uchimura, K., J. S. Chang, K. Urashima, M. Shoji, T. Ito, and S. Nitta, Electromagnetically induced noise radiations from AC surface discharges, Proc. of the 11th Int'l Conf. on Gas Discharge and their Applications, 2, Sept. 1995, Tokyo, Japan, 296-299 (1995)
Uh, Y., S. H. Kang, and T. Takagi, High immunity robust communication channel construction for non-Gaussian noise environment, XXIVth URSI General Assembly, Kyoto (1993)
Uh, Y., S. H. Kang, and T. Takagi, A new technology for highly reliable signal transmission based on a spatial signal distribution, IMTC '94 (1994)
Ushio, T., D. Wang, Z.-I. Kawasaki, K. Matsuura, and K. Yamamoto, Synchronized multipoint measurements of lightning electric field changes, Trans. IEE of Japan, 114-B, 11, 1160-1167 (1994)
Wada, O. et al., Effect of packages on electromagnetic noise emission from Digital C, Circuit Technology, J. Japan. Inst. Printed Circuits, 9, 3, 175-182 (in Japanese) (1994)
Wada, O. et al., Electromagnetic noise emission from a digital printed circuit board as in relation to dispersion of output resistance of CMOS logic IC, Trans. IEE Japan, 115-C, 4, 551-557 (in Japanese) (1995)
Wang, J., and T. Takagi, A noninvasive method for dielectric property measurement of biological tissues, XXIVth URSI General Assembly, Kyoto (1993)
Wang, J., and T. Takagi, Performance of local frequency offset space diversity for 16 star QAM, Electron. Lett., 30, 19, 1578-1579 (1994)
Wang, J., A. Rajhi, and T. Takagi, Measurement of current induced in human body for RF exposure, IMTC '94 (1994)
Wang, D., T. Ushio, Z.-I. Kawasaki, K. Matsuura, Y. Shimada, S. Uchida, C. Yamanaka, Y. Izawa, Y. Sonoi, and N. Simokura, The study of the possibility of lightning triggered by means of a laser, J. Atmos. Electr., 14, 49-55 (1994)
Wang, D., Z.-I. Kawasaki, K. Matsuura, Y. Shimada, S. Uchida, C. Yamanaka, E. Fujiwara, Y. Izawa, N. Simokura, and Y. Sonoi, A preliminary study on laser-triggered lightning, J. Geophys. Res., 99, D8, 16907-16912 (1994)
Wang, D., T. Ushio, Z.-I. Kawasaki, K. Matsuura, Y. Shimada, S. Uchida, C. Yamanaka, Y. Izawa, Y. Sonoi, and N. Simokura, A possible way to trigger lightning using a laser, J. Atmos. Terr. Phys., 57, 5, 456-466 (1995)
Wang, D., Z.-I. Kawasaki, K. Yamamoto, K. Matsuura, J. S. Chang, and W. Janischewskyj, Luminous propagation of lightning attachment to CN Tower, J. Geophys. Res., 100, D6, 11661-11667 (1995)
Wang, D., N. Takagi, T. Watanabe, T. Ushio, Z.-I. Kawasaki, K. Matsuura, Y. Shimada, S. Uchida, and C. Yamanaka, Progression of leader system in long gap laser triggered discharges, J. Atmos. Electr., 15, 2, 67-74 (1995)
Yamaguchi, M., K. Hattori, N. Iwama, S. Shimakura, and M. Hayakawa, A new ground-based direction finding method using a linear reconstruction of wave distribution function of magnetospheric VLF/ELF radio waves, Trans. IEICE, J76-B-II, 11, 880-889 (in Japanese) (1993)
Yamaguchi, M., K. Hattori, N. Iwama, and M. Hayakawa, A new direction finding method of magnetospheric VLF/ELF radio waves using the linear regularization and generalized cross validation, Dusty and Dirty Plasmas, Noise and Chaos in Space and in the Laboratory, New York, Plenum Press, 405 (1994)
Yamamoto, K., Y. Aiki, I. Matsubara, K. Matsuura, Z.-I. Kawasaki, H. Kinoshita, I. Arima, T. Takeuti, and T. Fujimoto, Magnetic field changes associated with triggered lightning initiated at the top of steel tower of transmission line in winter season, Trans. IEE of Japan, 112-B, 12. 1101-1109 (1992)
Yamamoto, N., H. Kaneko, S. Minegishi, A. Haga, and R. Sato, Experiments regarding ground currents conducting on communication network equipments, Technical Report of IEICE., EMCJ-94-326, 31-34 (1994)
Yamane, H., T. Ideguchi, M. Tokuda, and H. Koga, Proposal on ground resistance reducing material using water absorbent polymer, Trans. IEICE, J76-B-II, 3, 173-180 (1993)
Yamane, H., T. Ideguchi, M. Tokuda, and H. Koga, Fundamental characteristics for ground resistance reducing material using water absorbent polymer, Trans. IEICE, J77-B-II, 4, 219-226 (in Japanese) (1994)
Yamane, H., T. Ideguchi, and M. Tokuda, Stabilities against temperature and environment for ground resistance reducing material using water absorbent polymer, Trans. IEICE, J77-B-II, 8, 445-453 (in Japanese) (1994)
Yamane, H., M. Sato, T. Ideguchi, and M. Tokuda, New lightning-surge test method for subscriber telecommunication equipment considering nearby lightning return strokes, IEICE Trans. Commun., E78-B, 2, 193-198 (1995)
Yamane, H., M. Sato, T. Ideguchi, and M. Tokuda, New lightning surge test method for subscriber telecommunication equipment considering nearby lightning return strokes, to be published on the IEICE Trans. Commun.
Yamano, S., H. Sugimoto, H. Sone, and T. Takagi, Relationship between bridge and arc phenomena in opening Ag contact, Proc. of the International Conference on Electric Contacts (ICEC '94) (1994)
Yamano, S., H. Sugimoto, H. Sone, and T. Takagi, Experimental study on relationship between bridge and arc phenomena in breaking Ag contacts, IECE '94 (1994)
Yoshino, T., EMC Issues in Amateur Radio. Session, The role of the radio amateur in microwave engineering development (Invited), Proc. of APMC'94, Chiba, Japan, 19 (Dec.1994)
Yoshino, T., and H. Sato, New theory of source mechanism for seismogenic electromagnetic emissions based on the recent results of statistic analysis, Electromagnetic Compatibility, Wroclaw EMC94, 12, 430-435 (1994)
Yoshino, T., and H. Sato, The study of exciting process of seismogenic emissions at epicenter by magnetic flux based on the statistical analysis (Invited), Electromagnetic Phenomena Related to Earthquake Prediction, Terra Sci. Pub., 631-640, Tokyo, Japan (1994)
Yoshino, T., and H. Sato, The study of radiation and transmission mechanism of seismogenic EM emission by statistical analysis (Invited), Proc. of EMC '94 SENDAI, Sendai, Japan (May.1994)
Yoshino, T., and H. Sato, The study of exciting process of seismogenic emission at epicenter by magnetic flux based on the statistical analysis, Electromag. Phenom. Related to Earthquake Prediction (Proceeding Record), 631-640, TERRAPUB, Tokyo, Japan (Dec.1994)
Yoshino, T., and H. Sato, The experimental results on the actual measurement of energy transmission loss of magnetic field components across the tunnel to tunnel (Invited), submitted to XXI Gen. Assem. IUGG '95, Boulder Co., U.S.A. (Jul.1995)
Yoshino, T., and I. Tomizawa, The study of radiation and transmission mechanism EM emission by statistical analysis, 24th General Assembly of URSI, HEG Session, 45-46, Kyoto, Japan (Aug.1993)
Yoshino, T., and I. Tomizawa, The radiation and excitation mechanism of seismogenic electromagnetic waves which triggered by the magnetic field variations from focus (Invited), submitted to XXI Gen. Assem. IUGG '95, Boulder Co., U.S.A. (Jul.1995)
Yoshino, T., and S. Watanabe, High voltage electrostatic fields effect for biological safety of computer operators and its protection, Electromagnetic Compatibility, Wroclaw EMC94, 12, 99-104 (1994)
Yoshino, T., and F. Yamashita, Observation results of electromagnetic field intensity distribution to exposure of the Walkie-Talkie and automobile and biological effects in ham radio, Electromagnetic Compatibility, Wroclaw EMC94, 12, 105-109 (1994)
Yoshino, T., I. Tomizawa, and T. Sugimoto, Results of statistical analysis of seismogenic emissions as precursors to the earthquake and volcanic eruptions, Res. Lett. on Atoms. Electr., 12, 3, 203-210 (1992)
Yoshino, T., I. Tomizawa, and T. Sugimoto, Results of statistical analysis of low-frequency seismogenic EM emissions as precursors to earthquakes and volcanic eruptions, Phys. Earth and Planet. Interiors, 77, 21-31 (1993)
Contents
Commission D ('96)
Commission F ('96)
Commission E ('93)
Commission E ('99)