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This paper presents field experiments on the downlink throughput performance of a 5G centimeter wave radio access system employing higher rank MIMO in a shopping mall environment and a long corridor environment. The shopping mall has complex reflection paths within its non-line-of-sight areas. The long corridor environment exhibits line-of-sight propagation with many reflection paths. The results...
It is crucial to understand degradation factors under actual operation in the lifetime evaluation of the coil winding of transformer. Polyvinyl formal (PVF) wire is used in oil-immersed transformer. Main degradation factor is considered to be oxidation and damage of the insulation coating due to thermal stress and partial discharge (PD). This paper deals with electrical insulation performance evaluation...
Experimental and theoretical investigations and results on refining of nickel scrap materials applying electron beam melting (EBM) are presented and discussed. Different technological regimes (different e-beam powers and melting rates, single and double EBM) are realized and the refining effect on the recycling of nickel wastes is studied. Thermodynamics conditions and mechanisms as possibilities...
Energy saving and efficient power conversion technology are pressing concerns in today's society[1]. In order to use electrical energy efficiently, the technical development of power electronics — or power conversion technology — is urgently needed[2]. In response to this need, our aim is to nurture power electronics engineers. To this end, we have constructed an education system that presents the...
To realize further high performance in semiconductor devices such as power devices in power electronics, the development of efficient processes and a reduction in the number of trial productions are indispensable. Therefore, the orientation of development plans and a reduction in trial production by using TCAD (Technology Computer Aided Design) are expected. Moreover, in relation to global environmental...
In this study, we perform a device evaluation from trial device production (a computer simulation) using technology CAD (TCAD) in an integrated circuit consistent education system, which consists of a series of processes: system design, semiconductor process, trial device production, and device evaluation. By changing the device parameters (kinds of material, film thickness, impurities density) of...
The education programs of IC design and its related fields are conducted mainly at universities, graduate schools and/or technical colleges in Japan. Unfortunately, these programs are still not conducted in Japanese high schools. We suggested an IC design education method for understanding intuitively and feelingly for a high school using the making of the FET model in prior learning and the materials...
Muscle activity is followed by myoelectric potentials. Prior estimation of motion by surface electromyography can be utilized to assist the physically impaired people as well as surgeon. In this paper, we proposed a real-time method for the prior estimation of motion from surface electromyography, especially in the case of wrist angle. The method was based on the recursive processing of multi-layer...
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