Search Results - "Hiroyuki Yashima"

All-optical switchable logic gate using a single QD-SOA for RZ-BPSK signal inputs by Nabeyama, Akira, Yashima, Hiroyuki

“…In this paper, we propose an all-optical switchable logic gate using a single quantum-dot semiconductor optical amplifier (QD-SOA). This logic gate has…”
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Concatenated LDPC/2-D-Marker Codes and Non-Iterative Detection/Decoding for Recovering Position Errors in Racetrack Memories by Shibata, Ryo, Hosoya, Gou, Yashima, Hiroyuki

“…Racetrack memories (RMs) are prone to alignment faults called position errors (PEs), which manifest as insertions and deletions of stored data bits…”
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Log-Likelihood Ratio Calculation for Iterative Decoding on Rayleigh Fading Channels Using Padé Approximation by Hosoya, Gou, Yashima, Hiroyuki

“…Approximate calculation of channel log-likelihood ratio (LLR) for wireless channels using Padé approximation is presented. LLR is used as an input of iterative…”
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Symbol-Level Detection With Matched Non-Binary LDPC Codes for Position Errors in Racetrack Memories by Shibata, Ryo, Yashima, Hiroyuki

“…In racetrack memory (RM), insertion and deletion (ID) errors occur owing to alignment faults; such errors are referred to as position errors (PEs). Recently,…”
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Long-Term Effect of Nitrate Application from Lower Part of Roots on Nodulation and N2 Fixation in Upper Part of Roots of Soybean (Glycine max (L.) Merr.) in Two-Layered Pot Experiment by Yashima, Hiroyuki, Fujikake, Hiroyuki, Yamazaki, Akihiko, Ito, Sayuri, Sato, Takashi, Tewari, Kaushal, Ohtake, Norikuni, Sueyoshi, Kuni, Takahashi, Yoshihiko, Ohyama, Takuji

“…The long-term effect of the concentration and duration of application of nitrate from the lower part of soybean roots on the nodulation and nitrogen fixation…”
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Systemic and local effects of long-term application of nitrate on nodule growth and N2 fixation in soybean (Glycine max [L.] Merr.) by Yashima, Hiroyuki, Fujikake, Hiroyuki, Sato, Takashi, Ohtake, Norikuni, Sueyoshi, Kuni, Ohyama, Takuji

“…The effect of nitrate placement on the nodule number, nodule growth, and N 2 fixation activity in soybean plant was elucidated by using a two-layered pot…”
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Spatially-coupled LDPC codes for two dimensional erasure channel by Hosoya, Gou, Yashima, Hiroyuki

“…In this study, we developed spatially coupled LDPC (SC-LDPC) codes on the two-dimensional array erasure (2DAE) channel. We propose a method of generating new…”
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Structured Concatenation of Protograph LDPC Codes and Markers for Insertion/Deletion Channels by Shibata, Ryo, Hosoya, Gou, Yashima, Hiroyuki

“…In this paper, the structured concatenated coding of protograph LDPC codes and markers for insertion and deletion channels are proposed, where the joint…”
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Rapid and reversible nitrate inhibition of nodule growth and N2 fixation activity in soybean (Glycine max (L.) Merr.) by Fujikake, H. (Niigata Univ. (Japan). Faculty of Agriculture), Yashima, H, Sato, T, Ohtake, N, Sueyoshi, K, Ohyama, T

“…Nodulated soybean (Glycine max. (L) Merr. cv. Williams) plants were hydroponically cultured, and various combinations of 1-week culture with 5 or 0 mM nitrate…”
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All-Optical Hard Limiter Using Quantum-Dot SOA-based MZIs by Yashima, Hiroyuki, Uji, Yoshiki

“…In optical communication systems, signals are degraded by factors, such as amplified spontaneous emission (ASE) noise, attenuation and dispersion. A hard…”
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Determination of leghemoglobin components and xylem sap composition by capillary electrophoresis in hypernodulation soybean [Glycine max] mutants cultivated in the field by Sato, T. (Niigata Univ. (Japan)), Yashima, H, Ohtake, N, Sueyoshi, K, Akao, S, Harper, J.E, Ohyama, T

“…The hypernodulation soybean mutant lines (NOD1-3, NOD2-4, NOD3-7) and their parent Williams, and the mutant En6500 and its parent Enrei were cultivated in a…”
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Delayed Coding Scheme for Channels with Insertion, Deletion, and Substitution Errors by Shibata, Ryo, Yashima, Hiroyuki

“…We propose a new coding scheme, called the delayed coding (DC) scheme, for channels with insertion, deletion, and substitution (IDS) errors. The proposed…”
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Microscopic traffic simulator including driver recognition error model for evaluation of driving assistance systems by Yusuke Takatori, Hiroyuki Yashima

“…This paper describes a microscopic traffic simulator considering driver recognition errors for evaluation of driving assistance systems. The simulator…”
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Delayed Coding Scheme for Channels with Insertion, Deletion, and Substitution Errors by Shibata, Ryo, Yashima, Hiroyuki

“…We propose a new coding scheme, called the delayed coding (DC) scheme, for channels with insertion, deletion, and substitution (IDS) errors. The proposed…”
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Possible involvement of photosynthetic supply in changes of nodule characteristics of hypernodulating soybeans by Sato, Takashi, Yashima, Hiroyuki, Ohtake, Norikuni, Sueyoshi, Kuni, Akao, Shoichiro, Ohyama, Takuji

“…The hypernodulating mutant of soybean En6500 has a larger number of small nodules than its parent, cv. Enrei, and the shoot size is relatively small at the…”
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BER analysis of coherent optical CDMA communication systems with transfer function matrix by Igarashi, Yasutaka, Yashima, Hiroyuki

“…We analyze the bit error rate (BER) of coherent optical code-division multiple-access (CDMA) communication systems with a transfer function matrix (TFM). The…”
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Changes in concentration of leghemoglobin components in hypernodulation mutants of soybean by Nishiwaki, Toshikazu, Sato, Takashi, Yashima, Hiroyuki, Ikarashi, Taro, Ohyama, Takuji, Harper, James E., Akao, Shoichiro, Kouchi, Hiroshi

“…Leghemoglobin (Lb) plays a crucial role in N 2 fixation of soybean (Glycine max. L. Merr.) nodules by facilitating O 2 supply to the bacteroids. The…”
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Design of Irregular LDPC Codes without Markers for Insertion/Deletion Channels by Shibata, Ryo, Hosoya, Gou, Yashima, Hiroyuki

“…Over the past two decades, irregular low-density parity-check (LDPC) codes have been hardly able to decode information corrupted by insertion and deletion (ID)…”
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Optical CDMA with time hopping and power control for multimedia networks by Yashima, H., Kobayashi, T.

“…Optical code-division multiple access (OCDMA) for high-speed multimedia transmission is proposed and its performance is investigated. The proposed system…”
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Constellation shaping for non-uniform signals based on truncated Gaussian distribution by Hosoya, Gou, Yashima, Hiroyuki

“…We study the signal shaping based on the truncated Gaussian distribution. Since the possibility of reducing peak-to-average power ratio (PAPR) by the previous…”
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