The main objective of Frontier in Education Committee is to discuss the Engineering Education at higher education institutions in Japan and to publish the good effort 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 introduces the recent activities of Technical Committee on Electromagnetic Theory (EMT), IEEJ. The Technical Committee on EMT held committee meetings three times and technical meetings four times in 2016. The report also introduces three research topics presented in the technical meeting on EMT.

Trace the development and past research activities of the Technical Committee on Electromagnetic Compatibility (EMC), and recent activities of technical subcommittees were reported.

This report introduces recent activities of the Technical Committee on Plasma Science and Technology (TC-PST), IEEJ. The field of this committee includes researches and investigations on fundamentals and applications of various plasmas or plasma states over wide ranges of their density, temperature, ionization degree such as nuclear fusion, plasma processing, and plasma chemistry. The TC-PST usually provides technical meetings on the above topics three or four times a year for scientists and engineers as well as students.

Pulsed electromagnetic energy, which is usually used as an intense electric field, a large magnetic field, a high temperature, a high pressure etc., is capable of producing extremely energetic states as unique reactive fields. This paper reviews the recent progress on pulsed power generators, physics in high-energy-density states, high-energy particle beams, high power electromagnetic wave, and industrial applications to environment, agriculture, food processing and medical treatments.

Resent topics on electrical-discharge-related technologies along with the research activities of the technical committee on electrical discharges (TC-ED) of IEEJ are briefly presented. Following the introduction of major research subjects and aims of TC-ED, and the recent activities of TC-ED, such as Technical Meetings, International Conferences, Investigation Committees are presented.

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.

Instrumentation and measurement technology is very important for establishment of standards, evaluation and of equipment, development of multi-functional bioinstrumentation sensors, and other needs which span our society. 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 47^th Symposium on Electrical and Electronic Insulating Materials and Applications in Systems (SEEIMAS) hosted by Technical Committee on Dielectrics and Electrical Insulation (TC-DEI) in IEEJ in order to overview the research trend in this specific field. The proceedings booklet in Japanese, with English abstract and figure captions for each presentation, will be available at the IEEJ office.

In superconductors, the phase of electrons is a well-defined macroscopic variable. Recently many new devices and circuits were proposed and researched based on the particular control of the phase in superconductors, which include ferromagnetic Josephson devices, coherent quantum phase slip devices and adiabatic or reversible superconducting circuits. In this paper we will introduce resent trends and new developments in the research field named “Phase Engineering”.

Recent topics of Technical Committee of Magnetics were summarized and reported. The main topics are analysis and creation of structure in nano-scaled magnetic materials in (1) observation method, (2) material properties and functional control, and (3) their applications.

To solve increase of the mobile traffic, radio communication systems using millimeter wave band or terahertz wave band are required. Therefore an accurate spectrum analyzer is necessary in these bands. A tunable pre-selection filter is a key device in building such a spectrum analyzer. Hence, we proposed FPW (Fabry-Perot resonator inside Waveguide) filter for millimeter-wave band tunable filter. The FPW filter was realized widely tunable band and small size. However, this filter was not developed over 140 GHz yet. In this paper, we describe a design of 300 GHz band FPW filer and simulation results.

The 4G system (LTE-Advanced), and the 5G system as the next generation mobile communication are shifting to broadband communication using wider bandwidth for higher data rate than conventional system. For example, carrier aggregation technology is in the 4G, and millimeter wave is planning to be used in the 5G to expand frequency range. Therefore, as the evaluation environment for mobile communication terminal including the antenna performance are needed in the wider bandwidth and the higher frequency range. In this paper, as the receiver evaluation environment, we focused the anechoic chamber which is high convenience and low cost and we describe possibility of applying it to evaluation for mobile terminal in the frequency range from 700 MHz to 3 GHz. First, we clarify issue of current anechoic chamber for the receiver evaluation. And then, from BER characteristic, we show necessary QZ level and miniaturization size of anechoic chamber for the receiver evaluation. As a result, they are obtained that QZ level is -30 dB or less and miniaturization internal size of chamber is Sx=900 mm, Sy=Sz=650 mm by applying horn antenna as source of wave.

It is effective to understand two or three-dimensional displays of magnetic field distributions to figure out the magnetic field environment or to consider a magnetic field mitigation method, if necessary. Measurement of the magnetic field, as well as positioning of measuring points in space, has to be performed rapidly because the source current varies vigorously. This change in source current will result some changes in field distribution. This paper proposes a novel visualization system of the low-frequency magnetic field generated by power facilities or electrical equipment. The system utilizes a skeleton tracking function of Kinect as a position determining method. At first, a handy wireless magnetic field sensor module is developed to observe the magnetic field efficiently in a large space and transfer data to a PC. Furthermore, the measured magnetic field is then projected onto a real image on a PC screen by colored marks depending on the fluctuation of magnetic field strength. Finally, the expediency of the proposed system is verified by performing some experiments in the laboratory.

We develop a Brillouin optical correlation domain reflectometry (BOCDR) system using polarization diversity method and temporal gating scheme. Polarization diversity method is used for detecting backscattered light with rotated polarization from single mode fiber (SMF), and temporal gating scheme is used for expanding the measurement range. A section with 3 m length and 6000 µε strain was experimentally measured at a distance of 21 km SMF with 20 cm nominal spatial resolution. Our result shows the figure of merit N_R, which is a ratio between the measurement range and the spatial resolution, reaches to 105965.

The current sensor of the voltage-current sensor system proposed by us comprises two air-core sensing coils connected in series to each other with an opposite polarity. By doing so, it can measure the harmonics and power factor while removing the influence from power lines of other phases. When the sensors are surrounded by an iron case of a pole switch, EMF may be influenced. However, it has been confirmed that a large change is not observed with regard to measurement of harmonics, and the proposed sensors including a voltage sensor can be available without problem. Therefore it has been found out that the proposed sensor is able to perform power measurements in a state of being incorporated in the pole switch.

Purpose of this study is to clarify iron loss distribution on stator core surface of induction motors by using a heat-measurement method with a thermographic camera. This method has been applied to the surface mounted permanent magnet (PM) motors, which are removed stator windings, to measure temperature distributions on the stator surface during the PM rotor is rotating. Because the induction motors have no PM rotor, this method cannot apply directly and the exciting coils should be remained to generate rotating magnetic field. To overcome this difficulty, we firstly rotate the gage rotor at a certain low slip condition with an inverter driving motor and excited secondly the three phase stator windings. The heat radiation from a coil was corrected to obtain accurate iron loss distributions. In this paper, how to evaluate iron loss distribution on stator core surface of the induction motors is reported.

This paper describes phase noise floor level of digital phase noise measurement. It has estimated the noise floor level of phase noise from ENOB of the analog to digital converter and sampling frequency. We have discussed phase noise measurement using normal sampling based on sampling theorem and under sampling which samples longer sampling period than the signal under the test. We compared the phase noise spectral density of noise floor between normal sampling and under sampling. As a result, measurement results are in good agreement in both methods.

The objective of this study is to reduce rear-end vehicle collisions caused by human errors. In order to achieve this objective, we studied a technique to detect preceding vehicles with image processing using a monocular in-vehicle camera and a computer. As an image characteristic for vehicle detection, we adopt the shadow under the vehicle. Furthermore, in order to detect the shadow with high precision, limiting the processing area based on the white line detection. In this paper, we propose a technique for the white line detection by “edge detection using the white line edge characteristics” and “edge overlay using the ring buffer”. Experimental results show that the proposed method is more effective than the previous method.

To measure an angular radiative intensity distribution of thermal radiative heating system is important to estimate reflecting mirror instrument efficiency. For a shape-indpendent measurement, we compared a gonio-radiometric method with radiation-thermometric method. Difference of calculated efficiency was 4% at a thermal radiator within a reflecting mirror. The study suggests that using the gonio-radiometric method would be useful to evaluate a radiative flux of radiative heater with a reflecting mirror.

Recently, attempts to use deoxyribonucleic acid (DNA) as an industrially important substance have been emerging. For that purpose, easy and convenient determination of the higher-order structure of DNA is desirable. In this research, we measured far-infrared absorption spectra of various synthetic single stranded DNAs, each with an identical base in its nucleotides, and found that DNAs with different bases exhibit different spectra. We also demonstrated that the number of thymine bases on a single stranded DNA can be estimated from the spectra.

Insulation performance of vacuum decreases with micro particles. Particle-triggered breakdown phenomenon, which occurs when particle approaches and collides with electrode, was observed and the cause of the breakdown was investigated. It was found out that key factor of the breakdown was not particle impact speed but instantaneous field formed near the electrode with approaching-particle. The electric field at the particle collision was numerically computed changing the particle charge and the particle configuration. It turned out that big particle would cause breakdown easily. This coincides well with the experimental result.