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Showing 25 to 36 of 519 entries
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Studies of the light-focusing plastic rod. 18: Control of refractive-index distribution of plastic radial gradient-index rod by photocopolymerization.

Applied optics

Ohtsuka Y, Koike Y.
PMID: 18224204
Appl Opt. 1985 Dec 15;24(24):4316. doi: 10.1364/ao.24.004316.

No abstract available.

Measurement of atmospheric neutrino flux consistent with tau neutrino appearance.

Physical review letters

Abe K, Hayato Y, Iida T, Ishihara K, Kameda J, Koshio Y, Minamino A, Mitsuda C, Miura M, Moriyama S, Nakahata M, Obayashi Y, Ogawa H, Shiozawa M, Suzuki Y, Takeda A, Takeuchi Y, Ueshima K, Higuchi I, Ishihara C, Ishitsuka M, Kajita T, Kaneyuki K, Mitsuka G, Nakayama S, Nishino H, Okumura K, Saji C, Takenaga Y, Totsuka Y, Clark S, Desai S, Dufour F, Kearns E, Likhoded S, Litos M, Raaf JL, Stone JL, Sulak LR, Wang W, Goldhaber M, Casper D, Cravens JP, Kropp WR, Liu DW, Mine S, Regis C, Smy MB, Sobel HW, Vagins MR, Ganezer KS, Hill JE, Keig WE, Jang JS, Kim JY, Lim IT, Scholberg K, Tanimoto N, Walter CW, Wendell R, Ellsworth RW, Tasaka S, Guillian E, Learned JG, Matsuno S, Messier MD, Ichikawa AK, Ishida T, Ishii T, Iwashita T, Kobayashi T, Nakadaira T, Nakamura K, Nitta K, Oyama Y, Suzuki AT, Hasegawa M, Kato I, Maesaka H, Nakaya T, Nishikawa K, Sasaki T, Sato H, Yamamoto S, Yokoyama M, Haines TJ, Dazeley S, Hatakeyama S, Svoboda R, Sullivan GW, Habig A, Gran R, Fukuda Y, Sato T, Itow Y, Koike T, Jung CK, Kato T, Kobayashi K, Malek M, McGrew C, Sarrat A, Terri R, Yanagisawa C, Tamura N, Sakuda M, Sugihara M, Kuno Y, Yoshida M, Kim SB, Yoo J, Ishizuka T, Okazawa H, Choi Y, Seo HK, Gando Y, Hasegawa T, Inoue K, Ishii H, Nishijima K, Ishino H, Watanabe Y, Koshiba M, Kielczewska D, Zalipska J, Berns HG, Shiraishi KK, Washburn K, Wilkes RJ.
PMID: 17155460
Phys Rev Lett. 2006 Oct 27;97(17):171801. doi: 10.1103/PhysRevLett.97.171801. Epub 2006 Oct 23.

A search for the appearance of tau neutrinos from nu(mu) nu(tau) oscillations in the atmospheric neutrinos has been performed using 1489.2 days of atmospheric neutrino data from the Super-Kamiokande-I experiment. A best fit tau neutrino appearance signal of 138+/-48(stat)-32(+15)(syst)...

Dynamics of fast and slow pulse propagation through a microsphere-optical-fiber system.

Physical review. E, Statistical, nonlinear, and soft matter physics

Totsuka K, Tomita M.
PMID: 17358278
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Jan;75(1):016610. doi: 10.1103/PhysRevE.75.016610. Epub 2007 Jan 19.

We discuss the mechanism of fast and slow light generation when optical pulses propagate through a fiber taper coupled to an ultrahigh-Q microsphere system in the time domain. Fast and slow light are explained as interference effects between ballistic...

Eye movements in REM sleep could be controlled by the same conjugate system while awake.

Sleep medicine

Kimura K, Tachibana N, Otsuka Y, Waki R.
PMID: 14592178
Sleep Med. 2002 Sep;3(5):433-5. doi: 10.1016/s1389-9457(02)00041-2.

We describe the impairment of eye movements during REM sleep in a patient with internuclear ophthalmoplegia. A 75-year-old woman, complaining of acute unsteady gait and diplopia, was diagnosed to have right medial longitudinal fasciculus (MLF) syndrome with limited adduction...

Selective synthesis of allenes and alkynes through ligand-controlled, palladium-catalyzed decarboxylative hydrogenolysis of propargylic formates.

Organic letters

Ohmiya H, Yang M, Yamauchi Y, Ohtsuka Y, Sawamura M.
PMID: 20302325
Org Lett. 2010 Apr 16;12(8):1796-9. doi: 10.1021/ol100405k.

Ligand-controlled regioselective palladium-catalyzed decarboxylative hydrogenolysis of propargylic formates is described. A wide range of allenes and alkynes were obtained by using either 1,2-diphenylphosphinoethane (DPPE) or 1,6-bisdiphenylphosphinohexane (DPPH) as a catalyst ligand.

Optical coherence modulation by ultrasonic waves. 2: Application to speckle reduction.

Applied optics

Imai Y, Imai M, Ohtsuka Y.
PMID: 20234652
Appl Opt. 1980 Oct 15;19(20):3541-4. doi: 10.1364/AO.19.003541.

Laser light, which is doubly phase modulated by an ultrasonic wave, can be utilized for speckle reduction. The double phase modulation is found to be more effective for speckle reduction than single phase modulation, since the doubly modulated laser...

Spherical gradient-index sphere lens.

Applied optics

Koike Y, Sumi Y, Ohtsuka Y.
PMID: 18235629
Appl Opt. 1986 Oct 01;25(19):3356. doi: 10.1364/ao.25.003356.

No abstract available.

Heterodyne fiber-optic gyroscope using orthogonally polarized two-frequency beams.

Applied optics

Imai Y, Koseki H, Ohtsuka Y.
PMID: 20489993
Appl Opt. 1987 Aug 01;26(15):2962-5. doi: 10.1364/AO.26.002962.

A new type of heterodyne fiber-optic gyroscope using orthogonally polarized light components with different frequencies is described. Each counterpropagating beam consists of the orthogonal components transmitted in the principal axes of a polarization-maintaining fiber coil. A pair of beat...

Studies on the light-focusing plastic rod. 6: The photocopolymer rod of methyl methacrylate with vinyl benzoate.

Applied optics

Ohtsuka Y, Koike Y, Yamazaki H.
PMID: 20309103
Appl Opt. 1981 Jan 15;20(2):280-5. doi: 10.1364/AO.20.000280.

The photocopolymerization of methyl methacrylate (MMA) with vinyl benzoate (VB) containing benzoyl peroxide (BPO) was carried out in a glass tube to fabricate a light-focusing plastic rod (LFR, radius R(p)) with a parabolic refractive-index distribution (distribution constant A) in...

Light-beat measurements of second-order space-time correlation in the transmittance of a fluctuating medium.

Applied optics

Ohtsuka Y, Santoso B, Itoh K, Yamabayashi Y.
PMID: 20309310
Appl Opt. 1981 Apr 15;20(8):1345-9. doi: 10.1364/AO.20.001345.

A method is proposed for measurements of the second-order space-time correlation in the transmittance of a given fluctuating medium. Three kinds of light-beat photocurrent are produced by the use of some optical polarization components and two photodetectors. Correlational processing...

Search for proton decay via p-->e+pi0 and p-->micro+pi0 in a large water Cherenkov detector.

Physical review letters

Nishino H, Clark S, Abe K, Hayato Y, Iida T, Ikeda M, Kameda J, Kobayashi K, Koshio Y, Miura M, Moriyama S, Nakahata M, Nakayama S, Obayashi Y, Ogawa H, Sekiya H, Shiozawa M, Suzuki Y, Takeda A, Takenaga Y, Takeuchi Y, Ueno K, Ueshima K, Watanabe H, Yamada S, Hazama S, Higuchi I, Ishihara C, Kajita T, Kaneyuki K, Mitsuka G, Okumura K, Tanimoto N, Vagins MR, Dufour F, Kearns E, Litos M, Raaf JL, Stone JL, Sulak LR, Wang W, Goldhaber M, Dazeley S, Svoboda R, Bays K, Casper D, Cravens JP, Kropp WR, Mine S, Regis C, Smy MB, Sobel HW, Ganezer KS, Hill J, Keig WE, Jang JS, Kim JY, Lim IT, Fechner M, Scholberg K, Walter CW, Wendell R, Tasaka S, Learned JG, Matsuno S, Watanabe Y, Hasegawa T, Ishida T, Ishii T, Kobayashi T, Nakadaira T, Nakamura K, Nishikawa K, Oyama Y, Sakashita K, Sekiguchi T, Tsukamoto T, Suzuki AT, Minamino A, Nakaya T, Yokoyama M, Fukuda Y, Itow Y, Tanaka T, Jung CK, Lopez G, McGrew C, Terri R, Yanagisawa C, Tamura N, Idehara Y, Sakuda M, Kuno Y, Yoshida M, Kim SB, Yang BS, Ishizuka T, Okazawa H, Choi Y, Seo HK, Furuse Y, Nishijima K, Yokosawa Y, Koshiba M, Totsuka Y, Chen S, Heng Y, Yang Z, Zhang H, Kielczewska D, Thrane E, Wilkes RJ.
PMID: 19392425
Phys Rev Lett. 2009 Apr 10;102(14):141801. doi: 10.1103/PhysRevLett.102.141801. Epub 2009 Apr 08.

We have searched for proton decays via p-->e;{+}pi;{0} and p-->micro;{+}pi;{0} using data from a 91.7 kt.yr exposure of Super-Kamiokande-I and a 49.2 kt.yr exposure of Super-Kamiokande-II. No candidate events were observed with expected backgrounds induced by atmospheric neutrinos of...

Studies on the light-focusing plastic rod. 14: GRIN rod of CR-39-trifluoroethyl methacrylate copolymer by a vapor-phase transfer process.

Applied optics

Ohtsuka Y, Sugano T.
PMID: 18195802
Appl Opt. 1983 Feb 01;22(3):413-7. doi: 10.1364/ao.22.000413.

The gel rod, partially polymerized CR-39 [diethylene glycol-bis-(allyl carbonate)], is placed in the atmosphere of trifluoroethyl methacrylate (3FMA) vapor, followed by heat-treatment to yield the GRIN rod. Examining the relationship between the preparation conditions and the optical properties of...

Showing 25 to 36 of 519 entries