Masahide Sasaki

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As a base for human transcriptome and functional genomics, we created the “full-length long Japan” (FLJ) collection of sequenced human cDNAs. We determined the entire sequence of 21,243 selected clones and found that 14,490 cDNAs (10,897 clusters) were unique to the FLJ collection. About half of them (5,416) seemed to be protein-coding. Of those, 1,999(More)
We propose to quantify how “quantum” a set of quantum states is. The quantumness of a set is the worst-case difficulty of transmitting the states through a classical communication channel. Potential applications of this measure arise in quantum cryptography, where one might like to use an alphabet of states most sensitive to quantum eavesdropping, and in(More)
The wiretap channel has been devised and studied first by Wyner, and subsequently extended to the case with nondegraded general wiretap channels by Csiszár and Körner. Focusing mainly on the stationary memoryless channel with cost constraint, we newly introduce the notion of reliability and secrecy functions as a fundamental tool to analyze(More)
Risk factors for acquiring hepatitis E among individuals in industrialized countries including Japan are not fully understood. We investigated whether Japanese blood donors with or without an elevated alanine aminotransferase (ALT) level are likely to have hepatitis E virus (HEV) infection. Serum samples were collected from 5,343 voluntary blood donors(More)
We developed a four-channel superconducting nanowire single-photon detector system based on a Gifford-McMahon cryocooler. All channels showed a system detection efficiency (DE) (at a 100 Hz dark-count rate) higher than 16% at 1550 nm wavelength, and the best channel showed a system DE of 21% and 30% at 1550 and 1310 nm wavelength, respectively.
We demonstrate pulsed polarization-entangled photons generated from a periodically poled KTiOPO<sub>4</sub> (PPKTP) crystal in a Sagnac interferometer configuration at telecom wavelength. We achieved fidelities of 0.981 &#x00B1; 0.0002 for |&#x03C8;<sup>-</sup>&#x232A; and 0.980 &#x00B1; 0.001 for |&#x03C8;<sup>+</sup>&#x232A; respectively.
Akira Kitagawa, ∗ Masahiro Takeoka, 2 Masahide Sasaki, 2 and Anthony Chefles National Institute of Information and Communications Technology (NICT) 4-2-1 Nukui-Kita, Koganei, Tokyo 184-8795 Japan Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency 1-9-9 Yaesu, Chuoh, Tokyo 103-0028 Japan School of Mathematical(More)
The charge-integration readout circuit was fabricated to achieve an ultralow-noise preamplifier for photoelectrons generated in an avalanche photodiode with linear mode operation at 77 K. To reduce the various kinds of noise, the capacitive transimpedance amplifier was used and consisted of low-capacitance circuit elements that were cooled with liquid(More)
Now that the sequencing of the complete genome of the human malaria parasite Plasmodium falciparum is now underway, importance of analyses of complementary DNAs (cDNAs) is looming up. We constructed a full-length-enriched cDNA library from erythrocytic stage P. falciparum using the 'oligo-capping' method (Nucleic Acids Res. 29 (2001) 70). In this report we(More)