Hiroki Yamashita

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We isolated a LINE-type retrotransposon, LIb, which showed high transposition activity in sweet potato callus. A copy transposed in the callus was 6303 bp in length and showed key features of a LINE element. Apparently full-length copies sharing the 5′ UTR sequence with the 6303-bp copy increased dramatically in the callus as several original copies in the(More)
IT systems such as servers and routers need high-speed lowerpower area-efficient chip-to-chip interconnections through backplane boards. These interconnections must overcome signal degradation due to the large insertion loss of low-cost boards. In this work, a 90nm CMOS 8Gb/s transceiver is developed. A TX 5tap FFE, an RX analog equalizer, and a 2-tap DFE(More)
To address the two main challenges concerning the design of a transimpedance amplifier (TIA), namely, improving the sensitivity of the TIA without sacrificing bandwidth and suppressing inter-symbol interference (ISI) due to insertion loss, a 25 Gb/s optical receiver (RX) based on 65 nm CMOS technology, including a TIA and a PD operating at 1.3 m wavelength,(More)
A compact 4 × 25 Gbps optical transceiver has been fabricated for an optical backplane system, which consists of a 4 × 25 Gbps DFB-LD array, a 4 × 25 Gbps PIN-PD array, and a CMOS transceiver chip. These are directly mounted on 9 × 14 mm(2) multi-layer ceramic package with an electromagnetic shield structure to suppress inner-channel crosstalk effectively.(More)
We propose a novel method to synthesize a noise- and blur-free color image sequence using near-infrared (NIR) images captured in extremely low light conditions. In extremely low light scenes, heavy noise and motion blur are simultaneously produced in the captured images. Our goal is to enhance the color image sequence of an extremely low light scene. In(More)