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Okano F.,NHK Engineering Services Inc. | Shishikui Y.,Science and Technology Research Laboratories
Proceedings of the IEEE

Many engineers and researchers contributed towards the development of television since the successful experiments conducted by John Baird in the United Kingdom and Kenjiro Takayanagi in Japan in the 1920s. The research and development of television systems continued over the years culminating in the standardization of the NTSC, PAL, and SECAM formats as standard definition television (SDTV) systems. The motion picture, which was invented by the Lumiere brothers in 1895, has progressed dramatically since the invention of the television. It is now becoming possible to fabricate semiconductor devices, which form the basis of elemental technologies essential to video systems, at a submicrometer level of precision. If a new video system can be constructed exceeding the capabilities of HDTV, certainly it would bring many benefits in a wide range of fields. Science and Technology Research Laboratories has taken up the challenge of developing UHDTV as the system beyond HDTV, and it is called Super Hi-Vision. Source

Takahashi Y.,University of Tokyo | Miyamachi T.,University of Tokyo | Ienaga K.,University of Tokyo | Kawamura N.,University of Tokyo | And 3 more authors.
Physical Review Letters

In scanning tunneling microscopy, orbital selectivity of the tunneling process can make the topographic image dependent on a tip-surface distance. We have found reproducible dependence of the images on the distance for a monatomic layer of iron nitride formed on a Cu(001) surface. Observed atomic images systematically change between a regular dot array and a dimerized structure depending on the tip-surface distance, which turns out to be the only relevant parameter in the image variation. An accompanied change in the weight of Fe-3d local density of states to a tunneling background was detected in dI/dV spectra. These have been attributed to a shift in surface orbitals detected by the tip from the d states to the s/p states with increasing the tip-surface distance, consistent with an orbital assignment from first-principles calculations. © 2016 American Physical Society. Source

Emoto M.,Science and Technology Research Laboratories
Neuro-Ophthalmology Japan

Stereoscopic 3D imaging systems are now in practical use, which means that content creators and viewers need to be aware of the undesirable biomedical effects that are associated with these systems when changes are made in the sound developmental progress. In the present paper, we present factors and measurements on the unnaturalness of the images, viewing discomfort, and visual fatigue that results from viewing these stereoscopic images. These factors can be separated into two categories, the in-principle and the non-principle factors. In the non-principle category, these factors are related to differences in the characteristics of the left and right imaging equipment. As such, these factors can be eliminated, if so desired. The in-principle category factors are related to the horizontal binocular parallax, for which the degree needs to be carefully controlled. Although development continues to progress, there are significant issues that still need to be closely examined, and which include, the long-term undesirable biomedical effects, the potential effects on developing children, and the development of robust indices for visual fatigue. Source

Kogo N.,Science and Technology Research Laboratories | Ikeda T.,Science and Technology Research Laboratories
2012 IEEE International Workshop on Antenna Technology, iWAT 2012

The antenna performance of a transceiver located in front of the human head was investigated with the main interest in the dependency on frequencies and the location of the antenna. We used a numerical approach for the investigation. We designed a helical antenna with a metallic case as a handheld type transceiver and calculated the radiation patterns of the antenna with a numerical human-body model. Moreover, the specific absorption rate (SAR) in a human body exposed to electromagnetic waves from the antenna is shown. © 2012 IEEE. Source

Kogo N.,Science and Technology Research Laboratories | Ikeda T.,Science and Technology Research Laboratories
2013 International Symposium on Electromagnetic Theory, EMTS 2013 - Proceedings

The push-to-talk communication line for broadcasting services is used in the VHF band (165 MHz) and UHF band (460 MHz) in Japan. It is used for communication between staff during news gathering, television and radio program production, and so on. We designed a helical antenna with a metallic case as a handheld type transceiver and calculated the characteristics of the antenna with a numerical model of the human body. To investigate the effect of the human body on the performance of the antenna and the specific absorption rate on the human body, we calculated the antenna gain, radiation patterns and SAR when the antenna is in close proximity to the face. From these results, we propose using push-to-talk transceivers at a distance 'd' that is more than 100 mm from the view point of antenna gain and SAR. © 2013 IEICE. Source

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