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Games for co-evolution of digital resources and knowledge tools

Proceedings of the Association for Information Science and technology 2007年第1期43卷 1-5页

作者： Mary A. Keeler Heather D. Pfeiffer Center for Advanced Research Technology in the Arts and Humanities University of Washington Seattle Washington 98117 USA Department of Computer Science New Mexico State University Las Cruces New Mexico 88003-8001 USA

Successful digital resources have resulted from effective partnerships among content experts and tool builders, but such relationships are difficult to establish. Collaboratory testbeds were originally conceived as a response to that difficulty, but have been largely unsuccessful. We contend that effective testbed partnerships are as essential for knowledge-tool advancement as that advancement is to the support of effective partnerships, since knowledge tools must evolve to augment rather than merely to replicate human inference. We are building a game framework as a method for instituting testbed partnerships and an architecture for modular knowledge-tool integration, as essential steps in the co-evolution of knowledge tools and digital resource testbeds.

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Decigo: The japanese space gravitational wave antenna

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11th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories, MG 2006

作者： Ando, Masaki Kawamura, Seiji Nakamura, Takashi Seto, Naoki Tsubono, Kimio Numata, Kenji Takahashi, Ryuichi Musha, Mitsuru Ueda, Ken-Ichi Funaki, Ikkoh Moriwaki, Shigenori Takashima, Takeshi Sakai, Shin-Ichiro Sato, Takashi Kanda, Nobuyuki Nagano, Shigeo Hosokawa, Mizuhiko Ishikawa, Takehiko Sato, Shuichi Aso, Yoichi Morimoto, Mutsuko Y. Agatsuma, Kazuhiro Akutsu, Tomomi Akutsu, Tomotada Aoyanagi, Koh-Suke Arai, Koji Arase, Yuta Araya, Akito Asada, Hideki Chiba, Takeshi Ebisuzaki, Toshikazu Enoki, Motohiro Eriguchi, Yoshiharu Hong, Feng-Lei Fujimoto, Masa-Katsu Fukushima, Mitsuhiro Futamase, Toshifumi Ganzu, Katsuhiko Harada, Tomohiro Hashimoto, Tatsuaki Hayama, Kazuhiro Hikida, Wataru Himemoto, Yoshiaki Hirabayashi, Hisashi Hiramatsu, Takashi Horisawa, Hideyuki Ichiki, Kiyotomo Ikegami, Takeshi Inoue, Kaiki T. Ioka, Kunihito Ishidoshiro, Koji Ito, Hiroyuki Itoh, Yousuke Kamagasako, Shogo Kawashima, Nobuki Kawazoe, Fumiko Kirihara, Hiroyuki Kishimoto, Naoko Kiuchi, Kenta Klaus, Werner Kobayashi, Shiho Kohri, Kazunori Koizumi, Hiroyuki Kojima, Yasufumi Kokeyama, Keiko Kokuyama, Wataru Kotake, Kei Kozai, Yoshihide Kudoh, Hideaki Kunimori, Hiroo Kuninaka, Hitoshi Kuroda, Kazuaki Maeda, Kei-Ichi Matsuhara, Hideo Mino, Yasushi Miura, Jun-Ichi Miyakawa, Osamu Miyoki, Shinji Morioka, Tomoko Morisawa, Toshiyuki Mukohyama, Shinji Naito, Isao Nakagawa, Noriyasu Nakamura, Kouji Nakano, Hiroyuki Nakao, Kenichi Nakasuka, Shinichi Nakayama, Yoshinori Nishida, Erina Nishiyama, Kazutaka Nishizawa, Atsushi Niwa, Yoshito Ohashi, Masatake Ohishi, Naoko Ohkawa, Masashi Okutomi, Akira Onozato, Kouji Oohara, Kenichi Sago, Norichika Saijo, Motoyuki Sakagami, Masaaki Sakata, Shihori Sasaki, Misao Shibata, Masaru Shinkai, Hisaaki Somiya, Kentaro Sotani, Hajime Sugiyama, Naoshi Tagoshi, Hideyuki Takahashi, Tadayuki Takahashi, Ryutaro Takahashi, Kakeru Takahashi, Hirotaka Akiteru, Takamori Takano, Tadashi Tanaka, Takahiro Taniguchi, Keisuke Taruya, Atsushi Tashiro, Hiroyuki Tokuda, Mitsuru Tokunari, Masao Toyoshima, Morio Tsujikawa, Shinji Department of Physics University of Tokyo Bunkyo Tokyo 113-0033 Japan TAMA Project National Astronomical Observatory of Japan Mitaka Tokyo 181-8588 Japan Department of Physics Kyoto University Kyoto 606-8502 Japan Department of Physics and Astronomy University of California Irvine CA 92697-4575 United States NASA Goddard Space Flight Center Code 663 8800 Greenbelt Rd. Greenbelt MD 20771 United States Division of Theoretical Astronomy National Astronomical Observatory of Japan Mitaka Tokyo 181-8588 Japan Institute for Laser Science University of Electro-Communications Chofu Tokyo 182-8585 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Kanagawa 229-8510 Japan Department of Advanced Materials Science University of Tokyo 5-1-5 Kashiwanoha Kashiwa Chiba 277-8561 Japan Department of Electrical and Electronic Engineering Faculty of Engineering Niigata University Niigata Niigata 950-2181 Japan Department of Physics Osaka City University Osaka Osaka 558-8585 Japan Koganei Tokyo 184-8795 Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Tsukuba Ibaraki 305-8505 Japan Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba 277-8582 Japan Department of Physics Science and Engineering Waseda University Shinjuku Tokyo 169-8555 Japan Earthquake Research Institute University of Tokyo Bunkyo Tokyo 113-0032 Japan Department of Earth and Environmental Sciences Hirosaki University Hirosaki Aoraori 036-8560 Japan Department of Physics College of Humanities and Sciences Nihon University Setagaya Tokyo 156-8550 Japan RIKEN 2-1 Hirosawa Wako 351-0198 Japan Astronomical Data Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo 181-8588 Japan Department of Earth Science and Astronomy University of Tokyo Komaba Meguro Tokyo 153-8902 Japan Advanced Technology Center National Astronomical Observatory of Japan Mitaka Tokyo 181-858

ISBN: (纸本)9812834265

DECIGO (DECI-hertz interferometer Gravitational wave Observatory) is the future Japanese space gravitational wave antenna with observation band around 0.1 Hz. It aims at detecting gravitational waves from various kinds of sources, with sufficient sensitivity to establish the gravitational wave astronomy. In the pre-conceptual design, DECIGO is formed by three drag-free spacecraft, 1000 km apart from one another. The relative displacements between proof masses housed in these spacecraft are measured by Fabry-Perot interferometers. We plan to launch DECIGO in 2024 after research and development phase, including two milestone missions (DECIGO pathfinder and Pre-DECIGO) for verification of required technologies. © 2008 World Scientific Publishing Co. Pte. Ltd.

关键词： Gravity waves

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Ground-state bands of neutron-rich Th236 and U242 nuclei and implication of spherical shell closure at N=164

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Physical Review C 2007年第1期76卷 011303(R)-011303(R)页

作者： T. Ishii H. Makii M. Asai H. Koura S. Shigematsu K. Tsukada A. Toyoshima M. Matsuda A. Makishima J. Kaneko H. Toume I. Hossain T. Shizuma S. Ichikawa T. Kohno M. Ogawa Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan Department of Energy Sciences Tokyo Institute of Technology Yokohama 226-8502 Japan Department of Research Reactor and Tandem Accelerator Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan Department of Liberal Arts and Sciences National Defense Medical College Tokorozawa Saitama 359-8513 Japan Research Laboratory for Nuclear Reactors Tokyo Institute of Technology Meguro Tokyo 152-8550 Japan College of Science Ibaraki University Mito Ibaraki 310-8512 Japan Department of Physics Osaka University Toyonaka Osaka 560-0043 Japan Quantum Beam Science Directorate Japan Atomic Energy Agency Kyoto 619-0215 Japan

The ground-state bands of the neutron-rich Th236 and U242 nuclei were established up to spin 10 and 8, respectively, by in-beam γ-ray spectroscopy using the (O18, Ne20) two-proton pickup reaction with a U238 and a Pu244 target. Deexcitation γ rays in Th236 and U242 were identified by selecting the kinetic energies of Ne20 using Si ΔE−E detectors. The excitation energies of the first 2+ states in U and Pu isotopes have local minima at N≃146, suggesting the possibility that nuclei with Z≃92 have a spherical shell closure of N=164. Calculation using the Koura-Yamada single-particle potential gives an energy gap of 1.8 MeV at N=164 for U256.

关键词： SINGLE-PARTICLE ENERGIES HEAVIEST NUCLEI SUPERHEAVY ELEMENTS NO-254 ISOMERS

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Development of a Bioinstrumentation System in the Interaction between a Human and a Robot

Development of a Bioinstrumentation System in the Interactio...

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2006 IEEE/RSJ International Conference on Intelligent Robots and Systems

作者： Kazuko Itoh Hiroyasu Miwa Yuko Nukariya Massimiliano Zecca Hideaki Takanobu Stefano Roccella Maria Chiara Carrozza Paolo Dario Atsuo Takanishi ROBOCASA Tokyo Japan Department of Mechanical Engineering Waseda University Tokyo Japan Humanoid Robotics Institute (HRI) Waseda University Tokyo Japan Digital Human Research Center National Institute of Advanced Industrial Science and Technology (AIST) Tokyo Japan Graduate School of Science and Engineering Waseda University Tokyo Japan Department of Mechanical Systems Engineering Kogakuin University Tokyo Japan ASMeW Waseda University Tokyo Japan Scuola Superiore Sant Anna ARTS Laboratory Italy Scuola Superiore Sant' Anna ARTS Lab Pontedera Italy Advanced Research Institute for Science and Engineering Waseda University Tokyo Japan Tokyo Japan

Personal robots, which are expected to become popular in the future, are required to be active in joint work and community life with humans. Such robots must have no bad physical or psychical effect on humans. The psychical effect of a robot on humans has been subjectively measured using questionnaires. However, it has not been objectively measured yet. Human emotion and the consciousness direction can be measured by physiological parameters and body motion, respectively. Therefore, the bioinstrumentation system WB-1 was developed in order to objectively measure the psychical effect of a robot on a human. It can measure physiological parameters such as respiration, heart rate, perspiration and pulse wave, and arm motion. Analyzing human stress in the interaction with a robot from electrocardiogram, the robot could generate a motion for decreasing the stress

关键词： Human robot interaction Robot kinematics Humanoid robots Service robots Psychology Biomedical measurements Biomedical engineering Orbital robotics Intelligent robots Motion measurement

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Games of inquiry for collaborative concept structuring

Games of inquiry for collaborative concept structuring

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13th International Conference on Conceptual Structures, ICCS 2005

作者： Keeler, Mary A. Pfeiffer, Heather D. Center for Advanced Research Technology in the Arts and Humanities University of Washington Seattle WA 98117 United States Department of Computer Science New Mexico State University Las Cruces NM 88003-8001 United States

ISBN: (纸本)3540277838

Google's project to digitize five of the world's greatest libraries will dramatically extend their search engine reach in the future. Current search-engine philosophy, which asserts that "any search starts with a question to be answered," will need to be advanced in terms of Peirce's philosophy: "Any inquiry begins by creating an hypothesis to be tested, or with abduction." As conceptual structures researchers prepare to meet access challenges in the world of large Internet knowledge stores, they have a solid foundation in Peirce's theorized stages of inquiry: abduction, deduction, and induction. To indicate how conceptual structures tools must augment collaborative, Internet-based inquiry, we imagine a future scenario in the context of a user-centered testbed, where Peirce scholars apply Peirce's pragmatic theory in their complex manuscript reconstruction work. We suggest that games of inquiry can be developed to formalize user collaboration and technology needs, for improved specification of tool requirements in the testbed context. © Springer-Verlag Berlin Heidelberg 2005.

关键词： Groupware

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Collaboratory testbed partnerships as a knowledge capture challenge

Collaboratory testbed partnerships as a knowledge capture ch...

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3rd International Conference on Knowledge Capture, K-CAP'05

ISBN: (纸本)1595931635

The difficulty of maintaining effective testbed partnerships, among users of computer-based tools and builders of those tools, has been an obstacle to the success of science collaboratories. Testbed partnerships are as essential for knowledge-tool advancement as that advancement is to the support of effective partnerships, because knowledge tools must be instituted in a context that truly augments (rather than merely tries to replicate) human inference in collaborative contexts. We propose a game framework for engaging content-tool users and context-tool developers in testbed partnerships, and an architecture for modular knowledge-tool integration, as initial steps in the effective advancement of knowledge capture and improvement of testbed partnerships.

关键词： Testbeds

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Results of the search for inspiraling compact star binaries from TAMA300’s observation in 2000–2004

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Physical Review D 2006年第12期74卷 122002-122002页

作者： Tomomi Akutsu Tomotada Akutsu Masaki Ando Koji Arai Akito Araya Hideki Asada Youichi Aso Mark A. Barton Peter Beyersdorf Youhei Fujiki Masa-Katsu Fujimoto Ryuichi Fujita Mitsuhiro Fukushima Toshifumi Futamase Yusaku Hamuro Tomiyoshi Haruyama Hideaki Hayakawa Kazuhiro Hayama Gerhard Heinzel Gen’ichi Horikoshi Hideo Iguchi Yukiyoshi Iida Kunihito Ioka Hideki Ishitsuka Norihiko Kamikubota Nobuyuki Kanda Takaharu Kaneyama Yoshikazu Karasawa Kunihiko Kasahara Taketoshi Kasai Mayu Katsuki Keita Kawabe Mari Kawamura Seiji Kawamura Nobuki Kawashima Fumiko Kawazoe Yasufumi Kojima Keiko Kokeyama Kazuhiro Kondo Yoshihide Kozai Hideaki Kudoh Kazuaki Kuroda Takashi Kuwabara Namio Matsuda Norikatsu Mio Kazuyuki Miura Osamu Miyakawa Shoken Miyama Shinji Miyoki Hiromi Mizusawa Shigenori Moriwaki Mitsuru Musha Shigeo Nagano Yoshitaka Nagayama Ken’ichi Nakagawa Takashi Nakamura Hiroyuki Nakano Ken-ichi Nakao Yuhiko Nishi Kenji Numata Yujiro Ogawa Masatake Ohashi Naoko Ohishi Akira Okutomi Ken-ichi Oohara Shigemi Otsuka Norichika Sago Yoshio Saito Shihori Sakata Misao Sasaki Kouichi Sato Nobuaki Sato Shuichi Sato Youhei Sato Hidetsugu Seki Aya Sekido Naoki Seto Masaru Shibata Hisaaki Shinkai Takakazu Shintomi Kenji Soida Kentaro Somiya Toshikazu Suzuki Hideyuki Tagoshi Hirotaka Takahashi Ryutaro Takahashi Akiteru Takamori Shuzo Takemoto Kohei Takeno Takahiro Tanaka Keisuke Taniguchi Shinsuke Taniguchi Toru Tanji Daisuke Tatsumi C. T. Taylor Souichi Telada Kuniharu Tochikubo Masao Tokunari Takayuki Tomaru Kimio Tsubono Nobuhiro Tsuda Yoshiki Tsunesada Takashi Uchiyama Akitoshi Ueda Ken-ichi Ueda Fumihiko Usui Koichi Waseda Yuko Watanabe Hiromi Yakura Akira Yamamoto Kazuhiro Yamamoto Toshitaka Yamazaki Yuriko Yanagi Tatsuo Yoda Jun’ichi Yokoyama Tatsuru Yoshida Zong-Hong Zhu Institute for Cosmic Ray Research The University of Tokyo Kashiwa Chiba 277-8582 Japan Department of Astronomy The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan National Astronomical Observatory Mitaka Tokyo 181-8588 Japan Earthquake Research Institute The University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Faculty of Science and Technology Hirosaki University Hirosaki Aomori 036-8561 Japan Faculty of Science Niigata University Niigata Niigata 950-2102 Japan Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan Graduate School of Science Tohoku University Sendai Miyagi 980-8578 Japan High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan Max-Planck-Institut für Gravitationsphysik Callinstrasse 38 D-30167 Hannover Germany Tokyo Institute of Technology Meguro-ku Tokyo 152-8551 Japan Physics Department Pennsylvania State University University Park Pennsylvania 16802 USA Graduate School of Science Osaka City University Sumiyoshi-ku Osaka 558-8585 Japan LIGO Hanford Observatory Richland Washington 99352 USA Faculty of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan Kinki University Higashi-Osaka Osaka 577-8502 Japan Ochanomizu University Bunkyo-ku Tokyo 112-8610 Japan Department of Physics Hiroshima University Higashi-Hiroshima Hiroshima 739-8526 Japan Theoretical Astrophysics Group Department of Physics The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Tokyo Denki University Chiyoda-ku Tokyo 101-8457 Japan Department of Advanced Materials Science The University of Tokyo Kashiwa Chiba 277-8561 Japan Department of Physics Miyagi University of Education Aoba Aramaki Sendai 980-0845 Japan California Institute of Technology Pasadena California 91125 USA Institute for Laser Science University of Electro-Communications Chofugaoka Chofu Tokyo 182-8585 Japan National Institute of Information and Commun

We analyze the data of the TAMA300 detector to search for gravitational waves from inspiraling compact star binaries with masses of the component stars in the range 1M⊙–3M⊙. In this analysis, 2705 hours of data, taken during the years 2000–2004, are used for the event search. We combine the results of different observation runs, and obtain a single upper limit on the rate of the coalescence of compact binaries in our Galaxy of 20 per year at a 90% confidence level. In this upper limit, the effects of various systematic errors such as the uncertainty of the background estimation and the calibration of the detector’s sensitivity are included.

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Preparation and properties of ProNectin F-coated biodegradable hollow fibers

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Journal of Artificial Organs 2005年第4期8卷 245-251页

作者： El-Salmawy, Ahamed Kitagawa, Tatsuya Ko, In Kap Murakami, Akira Kimura, Yoshiharu Yamaoka, Tetsuji Iwata, Hiroo Institute for Frontier Medical Sciences Kyoto University Kyoto Japan Department of Polymer Science and Engineering Kyoto Institute of Technology Sakyo-ku Kyoto 606-8585 Matsugasaki Japan Department of Apparel Design Management and Technology Faculty of Applied Arts Helwan University Giza Egypt Department of Biomedical Engineering Advanced Medical Engineering Center National Cardiovascular Center Research Institute Suita Osaka 565-8565 5-7-1 Fujishirodai Japan

ProNectin F-coated biodegradable hollow fibers were newly prepared and their cytocompatibility was evaluated in vitro. Although the coating efficiency onto poly(l-lactic acid) (PLLA) and poly(lactide-co-caprolactone) [p(LA/CL)] matrices was similar, the cell adhesion properties were greatly affected by the nature of the polymer substrate. ProNectin F-coated PLLA showed about seven times higher cytocompatibility than ProNectin F-coated p(LA/CL). The single-extruded melt spinning method and the core-sheath bicomponent melt spinning method were employed to prepare PLLA hollow fibers. The effect of the spinning conditions, such as the melt draw ratio, spinneret temperature, and take-up speed, on the diameter and wall thickness of the spun fibers was studied in detail. For single-extruded melt spinning, a segmented type of spinneret was used, and the effect of the flow rate of nitrogen, which was confined in the hollow part of fibers, was studied. X-ray photographs of the drawn hollow fibers, clarified the significant molecular orientation, which was much higher than that in drawn solid PLLA fiber under identical drawing conditions. The morphology and mechanical properties of hollow fibers demonstrated an increase in the tensile strength and a decrease in the thickness of the PLLA wall with increased nitrogen flow rates and melt draw ratios for single-extruded melt spinning. These results indicate the unique characteristics of ProNectin F-coated PLLA hollow fibers, which can be successfully utilized as a biodegradable substrate. © The Japanese Society for Artificial Organs 2005.

关键词： Biodegradable polyester Hollow fiber Melt spinning PLLA Smooth muscle cell

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Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries

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Physical Review D 2006年第10期73卷 102002-102002页

作者： B. Abbott R. Abbott R. Adhikari A. Ageev J. Agresti P. Ajith B. Allen J. Allen R. Amin S. B. Anderson W. G. Anderson M. Araya H. Armandula M. Ashley F. Asiri P. Aufmuth C. Aulbert S. Babak R. Balasubramanian S. Ballmer B. C. Barish C. Barker D. Barker M. Barnes B. Barr M. A. Barton K. Bayer R. Beausoleil K. Belczynski R. Bennett S. J. Berukoff J. Betzwieser B. Bhawal I. A. Bilenko G. Billingsley E. Black K. Blackburn L. Blackburn B. Bland B. Bochner L. Bogue R. Bork S. Bose P. R. Brady V. B. Braginsky J. E. Brau D. A. Brown A. Bullington A. Bunkowski A. Buonanno R. Burgess D. Busby W. E. Butler R. L. Byer L. Cadonati G. Cagnoli J. B. Camp J. Cannizzo K. Cannon C. A. Cantley J. Cao L. Cardenas K. Carter M. M. Casey J. Castiglione A. Chandler J. Chapsky P. Charlton S. Chatterji S. Chelkowski Y. Chen V. Chickarmane D. Chin N. Christensen D. Churches T. Cokelaer C. Colacino R. Coldwell M. Coles D. Cook T. Corbitt D. Coyne J. D. E. Creighton T. D. Creighton D. R. M. Crooks P. Csatorday B. J. Cusack C. Cutler J. Dalrymple E. D’Ambrosio K. Danzmann G. Davies E. Daw D. DeBra T. Delker V. Dergachev S. Desai R. DeSalvo S. Dhurandhar A. Di Credico M. Díaz H. Ding R. W. P. Drever R. J. Dupuis J. A. Edlund P. Ehrens E. J. Elliffe T. Etzel M. Evans T. Evans S. Fairhurst C. Fallnich D. Farnham M. M. Fejer T. Findley M. Fine L. S. Finn K. Y. Franzen A. Freise R. Frey P. Fritschel V. V. Frolov M. Fyffe K. S. Ganezer J. Garofoli J. A. Giaime A. Gillespie K. Goda L. Goggin G. González S. Goßler P. Grandclément A. Grant C. Gray A. M. Gretarsson D. Grimmett H. Grote S. Grunewald M. Guenther E. Gustafson R. Gustafson W. O. Hamilton M. Hammond C. Hanna J. Hanson C. Hardham J. Harms G. Harry A. Hartunian J. Heefner Y. Hefetz G. Heinzel I. S. Heng M. Hennessy N. Hepler A. Heptonstall M. Heurs M. Hewitson S. Hild N. Hindman P. Hoang J. Hough M. Hrynevych W. Hua M. Ito Y. Itoh A. Ivanov O. Jennrich B. Johnson W. W. Johnson W. R. Johnston D. I. Jones G. Jones L. Jones D. Jungwirth V. Kalogera E. Katsavounidis K. Kawabe W. Kells J. Kern A. K Institute for Cosmic Ray Research The University of Tokyo Kashiwa Chiba 277-8582 Japan Department of Astronomy The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan Department of Physics The University of Tokyo Bunkyo-ku Tokyo 113-0033 Japan National Astronomical Observatory of Japan Tokyo 181-8588 Japan Earthquake Research Institute The University of Tokyo Bunkyo-ku Tokyo 113-0032 Japan Faculty of Science and Technology Hirosaki University Hirosaki Aomori 036-8561 Japan Faculty of Science Niigata University Niigata Niigata 950-2102 Japan Graduate School of Science Osaka University Toyonaka Osaka 560-0043 Japan Graduate School of Science Tohoku University Sendai Miyagi 980-8578 Japan High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan Tokyo Institute of Technology Meguro-ku Tokyo 152-8551 Japan Graduate School of Science Osaka City University Sumiyoshi-ku Osaka 558-8585 Japan Ochanomizu University Bunkyo-ku Tokyo 112-8610 Japan Department of Physics Hiroshima University Higashi-Hiroshima Hiroshima 739-8526 Japan Faculty of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan Tokyo Denki University Chiyoda-ku Tokyo 101-8457 Japan Department of Advanced Materials Science The University of Tokyo Kashiwa Chiba 277-8561 Japan Department of Physics Miyagi University of Education Aoba Aramaki Sendai 980-0845 Japan Institute for Laser Science University of Electro-Communications Chofugaoka Chofu Tokyo 182-8585 Japan Precision Engineering Division Faculty of Engineering Tokai University Hiratsuka Kanagawa 259-1292 Japan Waseda University Shinjyuku-ku Tokyo 169-8555 Japan Graduate School of Arts and Sciences The University of Tokyo Meguro-ku Tokyo 153-8902 Japan RIKEN Wako Saitaka 351-0198 Japan Yukawa Institute for Theoretical Physics Kyoto University Sakyo-ku Kyoto 606-8502 Japan Research Center for the Early Universe (RESCEU) Graduate School of Science The University of Tokyo Tokyo 113-0033 Japan Nat

We search for coincident gravitational wave signals from inspiralling neutron star binaries using LIGO and TAMA300 data taken during early 2003. Using a simple trigger exchange method, we perform an intercollaboration coincidence search during times when TAMA300 and only one of the LIGO sites were operational. We find no evidence of any gravitational wave signals. We place an observational upper limit on the rate of binary neutron star coalescence with component masses between 1 and 3M⊙ of 49 per year per Milky Way equivalent galaxy at a 90% confidence level. The methods developed during this search will find application in future network inspiral analyses.

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In-beam γ-ray spectroscopy of U240 using the (O18,O16) reaction

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Physical Review C 2005年第2期72卷 021301(R)-021301(R)页

作者： T. Ishii S. Shigematsu M. Asai A. Makishima M. Matsuda J. Kaneko I. Hossain S. Ichikawa T. Kohno M. Ogawa Department of Materials Science Japan Atomic Energy Research Institute Tokai Ibaraki 319-1195 Japan Department of Energy Sciences Tokyo Institute of Technology Yokohama 226-8502 Japan Advanced Science Research Center Japan Atomic Energy Research Institute Tokai Ibaraki 319-1195 Japan Department of Liberal Arts and Sciences National Defense Medical College Tokorozawa Saitama 359-8513 Japan Research Laboratory for Nuclear Reactors Tokyo Institute of Technology Meguro Tokyo 152-8550 Japan Department of Physics Seoul National University Seoul 151-747 Korea

In the two-neutron-transfer reaction of a 200-MeV O18 beam with a U238 target, deexcitation γ rays in a neutron-rich nucleus of U240 were measured. The γ rays in U240 were identified by taking coincidence with O16, using Si ΔE−E detectors. The kinetic energies of O16 particles allowed us to select the excitation energies of U240 below the neutron separation energy. The ground-state band and the Kπ=0− octupole band of U240 were established up to 12+ and 9−, respectively. The octupole-band head of U240 is about a hundred keV higher than those of U236,238, suggesting that a secondary maximum of octupole correlations exists at N=144−146 in U isotopes.

关键词： GROUND-STATE BAND EXCITED-STATES OCTUPOLE CORRELATIONS NUCLEI DEFORMATION ISOTOPES NO-254

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