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We proposed a perfectly facet-free surface-emitting 1.3-μm DFB laser toward cost-effective light source, and confirmed the same performances as the usual DFB lasers and an on-wafer measurement.
This paper describes an assurance diversity network platform for the New-generation Network (NWGN)/Future Internet. The primary focus is on the vision and five concrete network targets to realize the NWGN, which should ultimately contribute to global society over several decades. In the latter half of the paper, we propose a diversity network platform (DNP) concept for effectively accommodating various...
In Japan, the number of elderly persons who take medicine regularly has been increasing due to population aging. Since they can have the serious accidents caused by incorrect medication, we propose a medication monitoring system to detect incorrect medication. The system is composed of an intelligent medicine case, house-embedded sensors, and a database server. The case recognizes whether an elderly...
Gliomas represent the most frequent type of primary intracranial tumors, which originate from the brain tissue itself, have infiltrative growth, unclear borders, and usually affect functionally-important cerebral structures. From March 2000 till March 2010, 839 neurosurgical procedures directed on resection of such neoplasms were performed in the intelligent operating theater of Tokyo Women's Medical...
This paper describes a new sleep monitoring system for home use. The basic system consists of a wearable physiological sensor and the PC software for analyzing sleep quality from user's wrist motion and heart rate variability. Different from a conventional sleep monitoring device used in a hospital, the sensor is so small and easy-to-use that a normal person can use it at home. This means that the...
Traffic security is one of the most important problems to be improved for our daily environment, especially in Japan. Surveillance systems are effectively used to observe intrusion into dangerous and security area. They are well evaluated to monitor whether people enter such an area or not. A remote surveillance system has been developed, which supports users of mobile phones to facilitate network...
We propose an error signal transfer method for remote frequency stabilization in DWDM-PON. The error signal is embedded in a downlink signal using a supervisory frame; the effectiveness of this method is experimentally confirmed.
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