The main objective of Frontier in Education Committee is to discuss the Engineering Education at higher education institutions in Japan and to publish the paper or technical reports of many good efforts in education. This paper introduces recent activities of the Frontier in Education Committee.
The main objective of HEE is to examine the direction in which electrical engineering should move in the years ahead by studying the past. Electrical engineering history constitutes the basis of technologies that we should develop. It is the starting point from which we should approach the future. This paper introduces recent activities of the committee.
This report briefly presents activities of Technical Committee on Electromagnetic Theory (EMT), IEEJ. Our committee is now implementing the activities on 2018, which includes three times of the technical committee meeting and four times of technical committee conference. The report also contains three research topics presented in the technical committee meeting on EMT.
The technical committee on electromagnetic compatibility (EMC) was established under the Fundamentals and Materials Society (FMS), the Institute of Electrical Engineers in Japan (IEEJ) in 1999. Since then, researches and investigations related to this field have been conducted actively in the committee. In this report, historical trends and current activities in the research field of electromagnetic compatibility are summarized.
Recent plasma and pulsed power technologies have been used in various areas involving organic/inorganic materials processing, environmental protection, biology, medicine, nuclear fusion, propulsion, high-energy particle beams, and high power electromagnetic wave. This report introduces recent activities of the Technical Committee on Plasma and Pulsed Power (TC-PPP), IEEJ and recent progress in plasma and pulsed power technologies.
This report introduces recent activities of the Technical Committee on Electrical Discharges. The major research subjects and aims of the technical committee on electrical discharges, and the recent activities of the technical committee, such as technical meetings, international conferences, investigation committees are reported.
This article reports the topics of the field in light application and visual science, the activities of the technical committee (TC-LAV) and the introduction of research of technical meeting on light application and visual science of IEEJ.
The IEEJ Technical Committee on Instrumentation and Measurement has explored key technologies in this field through technical meetings and research committees. Its recent activities and some leading research results are presented.
This is a review of the 49th Symposium on Electrical and Electronic Insulating Materials and Application in Systems hosted by Technical Committee on Dielectrics and Electrical Insulation (TC-DEI) in IEEJ in order to overview the latest trend and front line in this research field. The proceedings booklet in Japanese, with English abstract and figure captions for each presentation, will be available at the IEEJ office.
In this report, we represent current status of quantum computer researches using superconducting technologies and show the direction of the future research and development. A superconducting quantum computer system combining superconducting electronics and superconducting qubits based on superconducting integrated circuit technology is expected to become a more active area in the future as a potential technology for realizing a scalable large-scale quantum computers.
This explanation paper is described on positioning and content of the activity of an investigation expert committee of the power magnetic material for the utilization technique of electrical machinery and apparatus. The effective activation method of the power magnetic material is necessary in order to develop the high efficiency electrical machinery and apparatus. The characteristic measured by the standard measuring method is insufficient, and the grasp of the magnetic characteristic in proportion to drive condition of real machine is required. Our committee investigates vector magnetic about research situations such as the stress effect, vector magnetic characteristic, etc. and the examination are carried out.
N2O gas is a causative substance of global warming, and it must reduce the discharge to the atmosphere. We have been developing the compact type of plasma reactor for decomposing the exhaust gas of N2O. We fabricated the fixed-bed-type plasma reactor filling mixture of an alumina wool and an activated carbon, and the decomposed experiments were conducted. The filling ratio of the activated carbon was greatly influence on the decomposition ratio of N2O.
We investigated the combined effect of temperature and humidity on partial discharge inception voltage (PDIV) of magnet wires under repetitive surge-wave voltages. As the results, the PDIV increased as the temperature increased in the environment of uncontrolled humidity, which is peculiar under surge-wave voltage. On the other hand in the environment of controlled humidity, the PDIV decreased monotonically as the temperature increased. We found that the PDIV increase was attributed to the effect of the relative humidity decrease corresponding to the temperature increase. Furthermore, the PDIV was also influenced by the water amount in insulation film. The PDIV during the temperature increase was lower than that during the temperature decrease with the hysteresis. The lower PDIV at the higher water amount is due to the release of water into the air gap as well as the decrease in the first ionization energy of insulation film, leading to the increase in the generation probability of an initial electron.
The aim of this paper is to clarify the treatable distance of Ferromagnetic Implant with Low Curie Temperature (FILCT), superparamagnetic nanoparticles Resovist® (Resovist) and the mixture of FILCT and Resovist (Reso-FILCT) as heating elements by using a wireless temperature measurement induction heating system for hyperthermia under a constant temperature environment of 37℃. In this experiment, a high-frequency magnetic field was applied to the three heating elements and their temperature and the superimposed voltage were measured every 1.0 cm up to 6.0 cm until the temperature of heating element no longer exceeds 45℃ even after 300 seconds passed. As a result, it was clarified that the treatable distance of FILCT is within 1.0 cm, the temperature of Resovist is difficult to control, and the treatable distance of Reso-FILCT is within 5.0 cm. Furthermore, it was revealed that Reso-FILCT has an initial temperature rising rate of 3.6 times and a change in superimposed voltage of 1.28 times than that of FILCT. From this point, we considered that wireless temperature measurement induction heating system using Reso-FILCT as heating element is useful for clinical application.
Measurements of transient electric fields due to collision electrostatic discharges (ESDs) between charged spherical electrodes with a diameter of 30 mm were conducted at charge voltages from 300 V to 600 V with an optical electric field probe. The result reveals that the corrected measurement waveforms properly provide electrostatic field levels at a distance of over 25 mm away from the discharge point. It also shows that the radiated electric field peaks increase with charging voltages, which is the opposite result to the well-known findings obtained so far for the lower voltage ESD events.