著者

Chin Ko

巻号頁・発行日

1996

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In this dissertation,optimal memory and processor allocation algorithms for parallel database processing are presented. Optimal memory allocation is one of the most important factors for preforming effective database query processing. In this dissertation, we discuss the memory resource allocation problem for the parallel database processing in the shared memory and distributed environments. We first introduce a stream-oriented parallel database processing scheme. This scheme has been designed for supporting advanced database applications in general purpose parallel processing environments. Then, we present formulas to describe the memory allocation problem for the stream-oriented parallel processing. After that, we prove two theorems for the optimal memory allocation problem. Finally, we present two new memory allocation algorithms for the stream-oriented parallel processing. By our algorithms, the optimal memory allocation is obtained for various databese queries in shared memory parallel processig environments and distributed processing environments. Another important factor for efficient parallel database processing is to allocate processors optimaly. In general, the optimal processor allocation of the parallel processing is NP-complete for distributed memory multiprocessor systems in which their communication network architectures are fixed. In order to reduce the complexity of the optimal processor allocatin, a reconfigurable multiprocessor system architecture PCVT is proposed. In the PCVT multiprocessor system, each processing element consists of a processor and a private memory. The processing elements are connected by a reconfigurable communication network. The significant characteristic of the PCVT system is that a physical communication path can be established dynamically between any two processing elements by the topology reconfiguration of the communication network. The architecture of the PCVT system, the topology reconfigration method of the communication network and a topology structure generation algorithm are presented in this dissertation. Finally, a processor allocation algorithm is presented.

著者

関田 隆一

巻号頁・発行日

2009

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筑波大学博士 (システムズ・マネジメント) 学位論文・平成21年7月24日授与 (甲第5167号)

著者

FUJII Tsutomu SAWAUMI Takafumi AIKAWA Atsushi

出版者

電子情報通信学会

雑誌

IEICE transactions on fundamentals of electronics, communications and computer sciences (ISSN:09168508)

巻号頁・発行日

vol.E96.A, no.8, pp.1768-1774, 2013-08

被引用文献数

11

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This study investigated the test-retest reliability and the criterion-related validity of the Implicit Association Test (IAT [1]) that was developed for measuring shyness among Japanese people. The IAT has been used to measure implicit stereotypes, as well as self-concepts, such as implicit shyness and implicit self-esteem. We administered the shyness IAT and the self-esteem IAT to participants (N =59) on two occasions over a one-week interval (Time 1 and Time 2) and examined the test-retest reliability by correlating shyness IATs between the two time points. We also assessed the criterion-related validity by calculating the correlation between implicit shyness and implicit self-esteem. The results indicated a sufficient positive correlation coefficient between the scores of implicit shyness over the one-week interval (r =.67, p < .01). Moreover, a strong negative correlation coefficient was indicated between implicit shyness and implicit self-esteem (r =-.72, p < .01). These results confirmed the test-retest reliability and the criterion-related validity of the Japanese version of the shyness IAT, which is indicative of the validity of the test for assessing implicit shyness.

著者

山口 政義

出版者

東京大学大学院新領域創成科学研究科環境学研究系自然環境学専攻

巻号頁・発行日

2010-03-24

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報告番号: ; 学位授与年月日: 2010-03-24 ; 学位の種別: 修士 ; 学位の種類: 修士(環境学) ; 学位記番号: 修創域第3431号 ; 研究科・専攻: 新領域創成科学研究科自然環境学専攻

著者

北澤 由美子

出版者

早稲田大学社会科学学会

雑誌

早稲田社会科学総合研究. 別冊, 2011年度学生論文集 (ISSN:13457640)

巻号頁・発行日

pp.155-168, 2012-06-25

著者

Nakamichi Yusuke Yoshioka Aya Kawai Shigeyuki Murata Kousaku

出版者

Nature Publishing Group

雑誌

Scientific reports (ISSN:20452322)

巻号頁・発行日

vol.3, 2013-09-11

被引用文献数

17

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ATP特異性の獲得メカニズムの解明 : 新薬と新しい物質生産系の開発に期待. 京都大学プレスリリース. 2013-09-11.

著者

Umemura Masayuki Susa Hajime Hasegawa Kenji Suwa Tamon Semelin Benoit

出版者

Oxford University Press

雑誌

Progress of theoretical and experimental physics (ISSN:20503911)

巻号頁・発行日

vol.1, pp.01A306, 2012-10

被引用文献数

8

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Firstly, the formation of first objects driven by dark matter is revisited by high-resolution hydrodynamic simulations. It is revealed that dark matter halos of ∼104 M⊙ can produce first luminous objects with the aid of dark matter cusps. Therefore, the mass of first objects is smaller by roughly two orders of magnitude than in the previous prediction. This implies that the number of Population III stars formed in the early universe could be significantly larger than hitherto thought. Secondly, feedback by photo-ionization and photo-dissociation photons in the first objects is explored with radiation hydrodynamic simulations, and it is demonstrated that multiple stars can form in a 105 M⊙ halo. Thirdly, the fragmentation of an accretion disk around a primordial protostar is explored with photo-dissociation feedback. As a result, it is found that photo-dissociation can reduce the mass accretion rate onto protostars. Also, protostars as small as 0.8 M⊙ may be ejected and evolve while keeping their mass, which might be detected as the “real first stars” in the Galactic halo. Finally, state-of-the-art radiation hydrodynamic simulations are performed to investigate the internal ionization of first galaxies and the escape of ionizing photons. We find that UV feedback by forming massive stars enhances the escape fraction even in a halo as massive as > 6 × 109 M⊙, while it reduces the star formation rate significantly. This may have a momentous impact on cosmic reionization.

著者

Ozawa A. Uesaka T. Wakasugi M.

出版者

Oxford University Press

雑誌

Progress of theoretical and experimental physics (ISSN:20503911)

巻号頁・発行日

vol.2012, no.1, pp.03C009, 2012-12

被引用文献数

55

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We describe the rare-RI (radioactive isotope) ring at the RI Beam Factory (RIBF). The main purpose of the rare-RI ring is to measure the mass of very neutron-rich nuclei, the production rates of which are very small (hence ‘rare RI’) and the lifetimes of which are predicted to be very short. In the rare-RI ring, there are two innovative pieces of apparatus: individual injection, which can realize the injection of 200 A MeV rare RIs one by one, and a cyclotron-like storage ring, which allows high isochronous magnetic fields with large angular and momentum acceptances. With these devices, we will achieve a 10−6 mass resolution, and will be able to access rare RIs, the production rate of which is down to 1 event/day/pnA. Construction of the rare-RI ring started in fiscal year 2012.

著者

Ohzeki Yasuhiro

巻号頁・発行日

1996

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The author owes endless gratitude to many persons who gladly supported him to complete this dissertation. Special appreciation is presented to Professor Takashi Okuno for his kind advice and help in writing this dissertation. The author also would like to thank Professors Hiroshi Sasaki, ...

著者

森 千鶴

巻号頁・発行日

1998

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筑波大学博士 (心身障害学) 学位論文・平成10年7月24日授与 (乙第1431号)

著者

二宮 健一

出版者

京都大学東南アジア研究所

雑誌

Kyoto Working Papers on Area Studies: G-COE Series

巻号頁・発行日

vol.92, pp.1-35, 2010-06

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Dancehall Gospel is a form of Gospel music in Jamaica. As the name suggests, it has the musical character of Dancehall music, which is the mainstream form of popular music in Jamaica. Dancehall Gospel singers are called 'Gospel Deejays'. One of the characteristics which sets Dancehall Gospel apart when it is compared with other forms of gospel music in Jamaica is that while gospel singers and church choirs are predominantly female, most gospel deejays are male. This paper examines the image of the 'Christian' male, which Dancehall Gospel represents, and considers the influence that it has on Jamaican church communities. This paper also aims to construct a conceptual framework within which to study the influence of the male image on social groups. Chapter 1 reviews three major perspectives found in Caribbean masculinity studies and shows that they lack effective concepts with which to study the influence of a male image on social groups. Chapter 2 presents the background of Dancehall Gospel. It examines the male image represented by church and Dancehall respectively. Chapter 3 examines the male image created by Gospel Deejays through their stage performances and considers the influence of that male image on church communities in Jamaica. The last chapter makes several notes to construct the conceptual framework to study the influence of the male image on social groups.

著者

玉木 章夫 雛田 元紀

出版者

東京大学生産技術研究所

雑誌

生産研究 (ISSN:0037105X)

巻号頁・発行日

vol.18, no.8, pp.219-221, 1966-08-01

著者

小沢 和彦

出版者

早稲田大学大学院商学研究科

雑誌

商学研究科紀要 (ISSN:02870614)

巻号頁・発行日

vol.76, pp.45-63, 2013-03-25

著者

中島 義明 川村 智 ナカジマ ヨシアキ カワムラ サトル Nakajima Yoshiaki Kawamura Satoru

出版者

大阪大学人間科学部

雑誌

大阪大学人間科学部紀要 (ISSN:03874427)

巻号頁・発行日

vol.22, pp.1-20, 1996-03

著者

Rui Yuxiang Honjo Tasuku Chikuma Shunsuke

出版者

National Academy of Sciences

雑誌

Proceedings of the National Academy of Sciences of the United States of America (ISSN:10916490)

巻号頁・発行日

2013-09-16

被引用文献数

38

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免疫のブレーキPD-1が、自然免疫反応の調節によって免疫難病の発症を抑制することを解明. 京都大学プレスリリース. 2013-09-17.

著者

Ejiri Shinji Kanaya Kazuyuki Umeda Takashi

出版者

Oxford University Press

雑誌

Progress of theoretical and experimental physics (ISSN:20503911)

巻号頁・発行日

vol.2012, no.1, pp.01A104, 2012-09

被引用文献数

5 5

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The WHOT-QCD Collaboration is pushing forward a series of lattice studies of quantum chromodynamics (QCD) at finite temperatures and densities using improved Wilson quarks. Because Wilson-type quarks require more computational resources than the more widely used staggered-type quarks, various theoretical and computational techniques have to be developed and applied. In this paper, we introduce a fixed-scale approach armed with a T-integration method, a Gaussian method based on cumulant expansion, and a histogram method combined with the reweighting technique. Using these methods, we have carried out the first study of finite-density QCD with Wilson-type quarks and the first calculation of the equation of state with 2+1 flavors of Wilson-type quarks. We present the results of these studies and discuss perspectives towards clarification of the properties of 2+1 flavor QCD at the physical point at finite temperatures and densities.

著者

Yoshida Yuko

出版者

Professor T.D. Wilson, Professor Emeritus of the University of Sheffield, with in-kind support from Lund University Libraries, Lund, Sweden and from the Swedish School of Library and Information Science..

雑誌

Information research (ISSN:13681613)

巻号頁・発行日

vol.18, no.3, 2013-09

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Introduction. The purpose of this research is to investigate the significance of public libraries as educational institutions. The meaning of lifelong learning in public libraries from the perspective of women's autonomous activities is re-examined.Method. The literature of the grassroots library movement and that of the empowerment of women is analysed within the framework of critical theory. The focus is on the history of a specific study group.Results. The research shows public libraries as mechanisms for empowering women and their learning efforts affirm their identities as independent women learners. It also describes how their activities broke the relationship between libraries as providers and citizens as beneficiaries merely enjoying fixed library services.Conclusion. Women's autonomous learning shows the essential value of the public library's function of providing lifelong learning. It validates the existence of public libraries, which have a unique role in society. Public libraries are places where lifelong learning is fully achieved in relation to empowering women.

著者

竹村 拓馬

巻号頁・発行日

2013

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Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 6389, 2013.3.25

著者

蜂屋 誠

巻号頁・発行日

2013

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Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 6390, 2013.3.25

著者

鈴木 光明

巻号頁・発行日

2013

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Thesis (Ph. D. in Science)--University of Tsukuba, (A), no. 6388, 2013.3.25