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富山商船高等専門学校研究集録

開放系の線形応答関数(II) : 独立スピン系への簡単な応用

瑞彦 佐伯

Published Sep 1, 1983• 0 citations
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混合スピン系の量子相転移(基礎物理学研究所短期研究会「量子効果が顕著な役割を果たす磁性現象の新展開」,研究会報告)

則雄 川上

物性研究•Sep 20, 1999•0 citations

The Cross-Modulation Effects in the Kr II Laser

Osamu Karatsu, Iwao Ogura

The intensity changes of all the important spontaneous emissions of Kr I and Kr II in visible region are examined, when the 5682Å laser transition (5p 4 D 5/2 →5s 2 P 3/2 ) in Kr II is interrupted by a rotating chopper. The strong positive cross-modulations are observed in the lines which start from 5p 4 D 5/2 state of Kr II. The cross-modulations of the lines which end on 5 s 2 P 3/2 state of Kr II are not so strong. But certain degree of cross-modulations are observed in some of the lines of Kr II which have no direct connection to the laser states. No cross-modulation is observed in the Kr I lines.

Japanese Journal of Applied Physics•Aug 1, 1972•2 citations

Ba ii fluorescence from barium atoms resonantly photoionized by 584-Å radiation

B. E. Cole, E. B. Saloman, D. L. Ederer

The first reported study of a fluorescence spectrum of a metal vapor resonantly excited by vacuum-ultraviolet radiation has been made in Ba ii. Seven Ba ii fluorescent transitions have been identified for Ba vapor excited by 584-Å radiation. The intensities of these transitions are consistent with the population distribution of excited Ba ii observed by using photoelectron spectroscopy. No detectable Ba ii fluorescence was observed when 736–742-Å excitation was used.

Journal of the Optical Society of America•Dec 1, 1981•2 citations

混合スピン系の量子相転移(基礎物理学研究所短期研究会「量子効果が顕著な役割を果たす磁性現象の新展開」,研究会報告)

Norio Kawakami

•Sep 20, 1999•0 citations

Anonymous Identity Based Encryption with Plaintext Awareness in the Two Identities Setting

C. LIN, Yong Li, Qingqing Zhang +1 more

An anonymous identity based encryption (anonymous IBE) scheme requires that an adversary can not determine the identity of the recipient from a ciphertext encrypted by the corresponding public key. The anonymity was formalized in previous works [1], [13], and this can be considered under chosen plaintext attack and adaptive chosen ciphertext attack, yielding two notions of security, ID-II-CPA and ID-II-CCA, where II denotes “indistinguishability of identities.” However, how to obtain an ID-II-CCA secure anonymous IBE in the random oracle model is still a challenging problem. We firstly propose a new notion of plaintext awareness in the two identities setting, called PATI. Secondly, we prove that the IBE scheme is ID-II-CCA secure if it is PATI secure. Finally, we propose the first generic conversion for anonymous IBE from ID-II-CPA to ID-II-CCA in the random oracle model.

IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences•Dec 1, 2008•0 citations

多重縮退のあるボンド問題(ランダムスピン系の相転移,研究会報告)

Yasuhiro Kasai

•Sep 20, 1978•0 citations
The intensity changes of all the important spontaneous emissions of Kr I and Kr II in visible region are examined, when the 5682Å laser transition (5p 4 D 5/2 →5s 2 P 3/2 ) in Kr II is interrupted by a rotating chopper. The strong positive cross-modulations are observed in the lines which start from 5p 4 D 5/2 state of Kr II. The cross-modulations of the lines which end on 5 s 2 P 3/2 state of Kr II are not so strong. But certain degree of cross-modulations are observed in some of the lines of Kr II which have no direct connection to the laser states. No cross-modulation is observed in the Kr I lines.
An anonymous identity based encryption (anonymous IBE) scheme requires that an adversary can not determine the identity of the recipient from a ciphertext encrypted by the corresponding public key. The anonymity was formalized in previous works [1], [13], and this can be considered under chosen plaintext attack and adaptive chosen ciphertext attack, yielding two notions of security, ID-II-CPA and ID-II-CCA, where II denotes “indistinguishability of identities.” However, how to obtain an ID-II-CCA secure anonymous IBE in the random oracle model is still a challenging problem. We firstly propose a new notion of plaintext awareness in the two identities setting, called PATI. Secondly, we prove that the IBE scheme is ID-II-CCA secure if it is PATI secure. Finally, we propose the first generic conversion for anonymous IBE from ID-II-CPA to ID-II-CCA in the random oracle model.