Oyama, S., Watkins, B. J., Maeda, S., Shinagawa, H., Nozawa, S., Ogawa, Y., ...
Lower-thermospheric winds at high latitudes during moderately-disturbed geomagnetic conditions were studied using data obtained with the European Incoherent Scatter (EISCAT) Kiruna-Sodankylä-Tromsø...
Simon, C., Lilensten, J., Moen, J., Holmes, J. M., Ogawa, Y., Oksavik, K., ...
We present for the first time a numerical kinetic/fluid code for the ionosphere coupling proton and electron effects. It solves the fluid transport equations up to the eighth moment, and the kinetic...
Naturally enhanced ion-acoustic lines at high altitudes (2008)
Ogawa, Y., Buchert, S. C., Fujii, R., Nozawa, S., Forme, F.
Naturally enhanced ion-acoustic lines (NEIALs) between 1200 and 1900 km altitude are investigated. The NEIALs were found in the background gates of data from the European Incoherent Scatter (EISCAT)...
Amm, O., Nakamura, R., Frey, H. U., Ogawa, Y., Kubyshkina, M., Balogh, A., ...
On 13 August 2002, at ~23:00 UT, about 10 min after a substorm intensification, Cluster observes a flux rope in the central magnetotail, followed by a localised fast flow event about oneminute later....
Oyama, S., Watkins, B. J., Maeda, S., Shinagawa, H., Nozawa, S., Ogawa, Y., ...
Lower-thermospheric winds at high latitudes during moderately-disturbed geomagnetic conditions were studied using data obtained with the European Incoherent Scatter (EISCAT) Kiruna-Sodankylä-Tromsø...
Simon, C., Lilensten, J., Moen, J., Holmes, J. M., Ogawa, Y., Oksavik, K., ...
We present for the first time a numerical kinetic/fluid code for the ionosphere coupling proton and electron effects. It solves the fluid transport equations up to the eighth moment, and the kinetic...
Naturally enhanced ion-acoustic lines at high altitudes (2008)
Ogawa, Y., Buchert, S. C., Fujii, R., Nozawa, S., Forme, F.
Naturally enhanced ion-acoustic lines (NEIALs) between 1200 and 1900 km altitude are investigated. The NEIALs were found in the background gates of data from the European Incoherent Scatter (EISCAT)...
Amm, O., Nakamura, R., Frey, H. U., Ogawa, Y., Kubyshkina, M., Balogh, A., ...
On 13 August 2002, at ~23:00 UT, about 10 min after a substorm intensification, Cluster observes a flux rope in the central magnetotail, followed by a localised fast flow event about oneminute later....
Cluster observations of high-frequency waves in the exterior cusp (2008)
Khotyaintsev, Y., Vaivads, A., Ogawa, Y., Popielawska, B., André, M., Buchert, S., ...
We study wave emissions, in the frequency range from above the lower hybrid frequency up to the plasma frequency, observed during one of the Cluster crossings of a high-beta exterior cusp region on 4...
Frequency dependent power fluctuations: a feature of the ESR system or physical? (2008)
Ogawa, Y., Forme, F., Buchert, S. C.
The k-dependence of the received power in high signal-to-noise ratio (SNR) conditions, occurring for naturally enhanced ion-acoustic lines (NEIALs) and for real satellites, is investigated by using...
Cluster observations of high-frequency waves in the exterior cusp (2008)
Khotyaintsev, Y., Vaivads, A., Ogawa, Y., Popielawska, B., André, M., Buchert, S., ...
We study wave emissions, in the frequency range from above the lower hybrid frequency up to the plasma frequency, observed during one of the Cluster crossings of a high-beta exterior cusp region on 4...
Frequency dependent power fluctuations: a feature of the ESR system or physical? (2008)
Ogawa, Y., Forme, F., Buchert, S. C.
The k-dependence of the received power in high signal-to-noise ratio (SNR) conditions, occurring for naturally enhanced ion-acoustic lines (NEIALs) and for real satellites, is investigated by using...
Lunde, J., Gustavsson, B., Løvhaug, U. P., Lorentzen, D. A., Ogawa, Y.
In this paper we present Naturally Enhanced Ion Acoustic Lines (NEIALs) observed with the EISCAT Svalbard Radar (ESR). For the first time, long sequences of NEIALs are recorded, with more than 50...
Observations of diverging field-aligned ion flow with the ESR (2008)
Buchert, S. C., Ogawa, Y., Fujii, R., Van Eyken, A. P.
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the...
Ion upflow and downflow at the topside ionosphere observed by the EISCAT VHF radar (2008)
Endo, M., Fujii, R., Ogawa, Y., Buchert, S. C., Nozawa, S., Watanabe, S., ...
We have determined the MLT distribution and KP dependence of the ion upflow and downflow of the thermal bulk oxygen ion population based on a data analysis using the EISCAT VHF radar CP-7 data...
Lunde, J., Gustavsson, B., Løvhaug, U. P., Lorentzen, D. A., Ogawa, Y.
In this paper we present Naturally Enhanced Ion Acoustic Lines (NEIALs) observed with the EISCAT Svalbard Radar (ESR). For the first time, long sequences of NEIALs are recorded, with more than 50...
Observations of diverging field-aligned ion flow with the ESR (2008)
Buchert, S. C., Ogawa, Y., Fujii, R., Van Eyken, A. P.
We report on observations of a diverging ion flow along the geomagnetic field that is often seen at the EISCAT Svalbard radar. The flow is upward above the peak of the electron density in the...
Ion upflow and downflow at the topside ionosphere observed by the EISCAT VHF radar (2008)
Endo, M., Fujii, R., Ogawa, Y., Buchert, S. C., Nozawa, S., Watanabe, S., ...
We have determined the MLT distribution and KP dependence of the ion upflow and downflow of the thermal bulk oxygen ion population based on a data analysis using the EISCAT VHF radar CP-7 data...
Photon correlation in GaAs self-assembled quantum dots (2008)
Kuroda, T., Abbarchi, M., Mano, T., Watanabe, K., Yamagiwa, M., Kuroda, K., ...
We report on photon coincidence measurement in a single GaAs self-assembled quantum dot (QD) using a pulsed excitation light source. At low excitation, when a neutral exciton line was present in the...
Ngwai, Y B, Adachi, Y, Ogawa, Y
No Abstract. International Journal of Biological & Chemical Sciences Vol. 1 (1) 2007: pp. 67-70
Compensation of the Crossing Angle with Crab Cavities at KEKB (2007)
Abe, T., Akai, K., Akemoto, M., Akiyama, A., Arinaga, M., Ebihara, K., ...
Crab cavities have been installed in the KEKB B--Factory rings to compensate the crossing angle at the collision point and thus increase luminosity. The beam operation with crab crossing has been...
Ngwai, Y.B., Adachi, Y., Ogawa, Y.
Growth suppression of antibiotic-resistant Salmonella typhimurium DT104 by a non-DT104 strain was investigated in vitro. Chromosomal mutants of eight antibiotic-resistant DT104 strains were generated...
Joint LIGO and TAMA300 search for gravitational waves from inspiralling neutron star binaries (2006)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Ajith, P., ...
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...
Akutsu, T., Akutsu, T., Ando, M., Arai, K., Araya, A., Asada, H., ...
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[sun]–3M[sun]. In this...
Volcanism in Response to Plate Flexure (2006)
Hirano, N., Takahashi, E., Yamamoto, J., Abe, N., Ingle, S.P., Kaneoka, I., ...
Volcanism on Earth is known to occur in three tectonic settings: divergent plate boundaries (such as mid-ocean ridges), convergent plate boundaries (such as island arcs), and hot spots. We report...
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott,B., Abbott,R., Adhikari,R., Ageev,A., Agresti,J., Ajith,P., ...
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott,B., Abbott,R., Adhikari,R., Ageev,A., Agresti,J., Ajith,P., ...
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Ajith, P., ...
Ando, M., Arai, K., Aso, Y., Beyersdorf, P., Hayama, K., Iida, Y., ...
Upper limits from the LIGO and TAMA detectors on the rate of gravitational-wave bursts (2005)
Abbott, B., Abbott, R., Adhikari, R., Ageev, A., Agresti, J., Ajith, P., ...
Chiral Sigma Model with Pion Mean Field in Finite Nuclei (2003)
Ogawa, Y., Toki, H., Tamenaga, S., Shen, H., Hosaka, A., Sugimoto, S., ...
The properties of infinite matter and finite nuclei are studied by using the chiral sigma model in the framework of the relativistic mean field theory. We reconstruct an extended chiral sigma model...
The Kekb Bucket Selection System - Recent Progress And (2002)
E. Kikutani, Y. Ogawa, M. Tobiyama
The KEKB bucket selection system, which enables us to realize a variety of bunch fill-patterns in the KEKB rings, has been working well since the start of the commissioning of KEKB in Dec. 1998....
Observation Of Vertical Beam Blow-Up In Kekb Low Energy Ring (2000)
H. Fukuma, K. Akai, N. Akasaka, K. Bane, K. Egawa, A. Enomoto, ...
This paper describes an experimental study of the enlargement of the vertical beam size observed in single beam operation at the KEKB LER. 1 INTRODUCTION A blow-up of the vertical beam size is...
Beam Switching and Beam Feedback Systems at KEKB Linac (2000)
Furukawa, K., Enomoto, A., Kamikubota, N., Kamitani, T., Matsumoto, T., Ogawa, Y., ...
The KEK 8-GeV electron / 3.5-GeV positron linac has been operated with very different beam specifications for downstream rings, KEKB, PF and PF-AR. For the reliable operation among these beam modes...
Beam optics matching in the KEKB injector linac (2000)
Kamitani, T, Koiso, H, Akasaka, N, Enomoto, A, Flanagan, J, Fukuma, H, ...
Commissioning Of The Kekb B--Factory (1999)
Y. Ogawa, K. Ohmi, Y. Ohnishi, S. Ohsawa, N. Ohuchi, K. Oide, ...
The commissioning of the KEKB B--Factory storage rings started on Dec. 1, 1998. The two rings both achieved a stored current of over 0.5 A after operating for four months. The two beams were...
Lattice Diagnostics Using Single Kick Closed Orbit (1999)
Y. Ohnishi, K. Akai, N. Akasaka, A. Enomoto, J. Flanagan, H. Fukuma, ...
We have measured beta functions using single kick closed orbit at KEKB. The measured beta functions were compared with the model lattice and gradient errors were extracted from the result in a beta...
For The Kekb Injector Linac (1999)
J. W. Flanagan, K. Oide, N. Akasaka, A. Enomoto, K. Furukawa, T. Kamitani, ...
A simple real-time beam tuning program has been developed for use at the KEK B-Factory injector linac. The program features the ability to adjust an arbitrary combination of parameters (e.g. magnet...
A simple real-time beam tuning program for the KEKB injector linac (1999)
Flanagan, J W, Oide, K, Akasaka, N, Enomoto, A, Furukawa, K, Kamitani, T, ...
Nishimura, T., Tsutsumi, T., Ohgane, T., Ogawa, Y.
In multiple-input multiple-output (MIMO) systems, eigenbeam space division multiplexing (E-SDM) [1], [2] has higher performance compared to conventional SDM and an advantage that simple detection...
Kohno, M., Hida, H., Ogawa, Y., Fujii, M., Maeda, T.
This paper describes novel rapid thermal annealing for GaAs wafers under vacuum conditions (VRTA) using a three-zone lamp power control method. The developed RTA technology eliminates generation of...
Commissioning of the KEKB linac (1998)
Ogawa, Y, Akasaka, N, Enomoto, A, Flanagan, J, Fukuma, H, Funakoshi, Y, ...
Behavior of $^{7}Be$ in the moderator cooling system at the pulsed neutron source: KENS (1998)
Itoh, S, Miura, T, Furusaka, M, Yasui, S, Ogawa, Y, Kiyanagi, Y, ...
New streak-camera system for the KEKB linac (1998)
Ogawa, Y, Furukawa, K, Kamitani, T, Ohsawa, S, Enomoto, A, Suzuki, T, ...
Inoue, M., Itoh, H., Ueda, M., Naruko, T., Kojima, A., Komatsu, R., ...
Bunching system of the KEKB linac (1996)
Choi Jae Young, Ohsawa, S, Kamitani, T, Ogawa, Y, Enomoto, A, Sato, I
Microscopic description of light unstable nuclei with the stochastic variational method (1996)
Varga, K., Suzuki, Y., Arai, K., Ogawa, Y.
The structure of the light proton and neutron rich nuclei is studied in a microscopic multicluster model using the stochastic variational method. This approach enables us to describe the weakly bound...
Suzuki, Y., Arai, K., Ogawa, Y., Varga, K.
We present a new and simple method of calculating the occupation probability of the number of total harmonic-oscillator quanta for a microscopic cluster-model wave function. Examples of applications...
Structure of the mirror nuclei $^9$Be and $^9$B in a microscopic cluster model (1996)
Arai, K., Ogawa, Y., Suzuki, Y., Varga, K.
The structure of the mirror nuclei $^9$Be and $^9$B is studied in a microscopic $\alpha+ \alpha+ n$ and $\alpha+ \alpha+ p$ three-cluster model using a fully antisymmetrized 9-nucleon wave function....
High-intensity single-bunch beam of the PF 2.5-GeV linac (1995)
Ohsawa, S, Yamaguchi, S, Kamitani, T, Enomoto, A, Ogawa, Y, Yokota, M, ...
Re-formation of the PF 2.5-GeV linac to 8 GeV (1995)
Enomoto, A, Hanaki, H, Kakihara, K, Kamitani, T, Ogawa, Y, Ohsawa, S, ...