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  1. Article ; Online: High-performance phase camera as a frequency selective laser wavefront sensor for gravitational wave detectors.

    Agatsuma, Kazuhiro / van der Schaaf, Laura / van Beuzekom, Martin / Rabeling, David / van den Brand, Jo

    Optics express

    2019  Volume 27, Issue 13, Page(s) 18533–18548

    Abstract: We have designed, built and tested a high-performance phase camera, which can observe laser wavefronts in a large range of sideband frequencies. Our phase camera scans the laser beam over a pinhole diode and uses a heterodyne technique to independently ... ...

    Abstract We have designed, built and tested a high-performance phase camera, which can observe laser wavefronts in a large range of sideband frequencies. Our phase camera scans the laser beam over a pinhole diode and uses a heterodyne technique to independently assess the information in the upper and lower sidebands of up to five different modulation frequencies. Amplitude and phase images, consisting of 2
    Language English
    Publishing date 2019-06-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.27.018533
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: [Hydrocephalus Mimicking Idiopathic Normal Pressure Hydrocephalus as the First Manifestation of Neurosarcoidosis].

    Sugiyama, Atsuhiko / Kobayashi, Makoto / Agatsuma, Kumiko / Bo, Takeshi / Shiojiri, Toshiaki / Mochida, Hidetoshi / Suzuki, Yoshio / Matsunaga, Takashi / Kuwabara, Satoshi

    Brain and nerve = Shinkei kenkyu no shinpo

    2016  Volume 68, Issue 12, Page(s) 1477–1482

    Abstract: A 61-year-old woman presented with a 10-month history of gait disturbance and a 7-month history of urinary incontinence. The Hasegawa dementia scale-revised score indicated cognitive impairment. Brain magnetic resonance imaging (MRI) indicated ... ...

    Abstract A 61-year-old woman presented with a 10-month history of gait disturbance and a 7-month history of urinary incontinence. The Hasegawa dementia scale-revised score indicated cognitive impairment. Brain magnetic resonance imaging (MRI) indicated hydrocephalus with disproportionately enlarged subarachnoid space. This is usually considered a characteristic finding in idiopathic normal pressure hydrocephalus (iNPH). Ventriculo-peritoneal shunting improved the patient's symptoms. Neurosarcoidosis was suspected as a cause of the hydrocephalus because of the abnormalities in the cerebrospinal fluid and the abnormal enhancement of the cauda equina, the leptomeninges of the brainstem, and the spinal cord, as seen on MRI with gadolinium enhancement. A biopsy from the mediastinum lymph nodes confirmed the histological diagnosis of sarcoidosis. Physicians should consider the possibility of neurosarcoidosis in patients presenting with hydrocephalus, even in cases where clinical and radiological data are characteristic of iNPH. (Received April 13, 2016; Accepted July 5, 2016; Published December 1, 2016).
    MeSH term(s) Biopsy ; Central Nervous System Diseases/diagnosis ; Central Nervous System Diseases/pathology ; Diagnosis, Differential ; Female ; Humans ; Hydrocephalus, Normal Pressure/diagnosis ; Magnetic Resonance Imaging ; Middle Aged ; Multimodal Imaging ; Positron-Emission Tomography ; Sarcoidosis/diagnosis ; Sarcoidosis/pathology
    Language Japanese
    Publishing date 2016-12
    Publishing country Japan
    Document type Case Reports ; Journal Article ; Review
    ZDB-ID 390389-8
    ISSN 1344-8129 ; 1881-6096 ; 0006-8969
    ISSN (online) 1344-8129
    ISSN 1881-6096 ; 0006-8969
    DOI 10.11477/mf.1416200619
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 398: Show issues Location:
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  3. Article ; Online: Precise measurement of laser power using an optomechanical system.

    Agatsuma, Kazuhiro / Friedrich, Daniel / Ballmer, Stefan / DeSalvo, Giulia / Sakata, Shihori / Nishida, Erina / Kawamura, Seiji

    Optics express

    2014  Volume 22, Issue 2, Page(s) 2013–2030

    Abstract: This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave ... ...

    Abstract This paper shows a novel method to precisely measure the laser power using an optomechanical system. By measuring a mirror displacement caused by the reflection of an amplitude modulated laser beam, the number of photons in the incident continuous-wave laser can be precisely measured. We have demonstrated this principle by means of a prototype experiment uses a suspended 25 mg mirror as an mechanical oscillator coupled with the radiation pressure and a Michelson interferometer as the displacement sensor. A measurement of the laser power with an uncertainty of less than one percent (1σ) is achievable.
    MeSH term(s) Energy Transfer ; Equipment Design ; Equipment Failure Analysis/instrumentation ; Lasers ; Lenses ; Manometry/instrumentation ; Micro-Electrical-Mechanical Systems/instrumentation ; Oscillometry/instrumentation ; Radiometry/instrumentation
    Language English
    Publishing date 2014-01-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1491859-6
    ISSN 1094-4087 ; 1094-4087
    ISSN (online) 1094-4087
    ISSN 1094-4087
    DOI 10.1364/OE.22.002013
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Direct measurement of thermal fluctuation of high-Q pendulum.

    Agatsuma, Kazuhiro / Uchiyama, Takashi / Yamamoto, Kazuhiro / Ohashi, Masatake / Kawamura, Seiji / Miyoki, Shinji / Miyakawa, Osamu / Telada, Souichi / Kuroda, Kazuaki

    Physical review letters

    2010  Volume 104, Issue 4, Page(s) 40602

    Abstract: We have achieved a direct measurement of the thermal fluctuation of a pendulum in an off-resonant and wide frequency region using a laser interferometric gravitational-wave detector. These measurements have been well identified for over one decade by an ... ...

    Abstract We have achieved a direct measurement of the thermal fluctuation of a pendulum in an off-resonant and wide frequency region using a laser interferometric gravitational-wave detector. These measurements have been well identified for over one decade by an agreement with a theoretical prediction, which is derived by a fluctuation-dissipation theorem. Thermal fluctuation was dominated by the contribution of resistances in coil-magnet actuator circuits. When we tuned these resistances, the noise spectrum also changed according to a theoretical prediction. The measured thermal noise level corresponds to a high quality factor on the order of 10(5) of the pendulum.
    Language English
    Publishing date 2010-01-29
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.104.040602
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Characterization of the room temperature payload prototype for the cryogenic interferometric gravitational wave detector KAGRA.

    Peña Arellano, Fabián Erasmo / Sekiguchi, Takanori / Fujii, Yoshinori / Takahashi, Ryutaro / Barton, Mark / Hirata, Naoatsu / Shoda, Ayaka / van Heijningen, Joris / Flaminio, Raffaele / DeSalvo, Riccardo / Okutumi, Koki / Akutsu, Tomotada / Aso, Yoichi / Ishizaki, Hideharu / Ohishi, Naoko / Yamamoto, Kazuhiro / Uchiyama, Takashi / Miyakawa, Osamu / Kamiizumi, Masahiro /
    Takamori, Akiteru / Majorana, Ettore / Agatsuma, Kazuhiro / Hennes, Eric / van den Brand, Jo / Bertolini, Alessandro

    The Review of scientific instruments

    2016  Volume 87, Issue 3, Page(s) 34501

    Abstract: KAGRA is a cryogenic interferometric gravitational wave detector currently under construction in the Kamioka mine in Japan. Besides the cryogenic test masses, KAGRA will also rely on room temperature optics which will hang at the bottom of vibration ... ...

    Abstract KAGRA is a cryogenic interferometric gravitational wave detector currently under construction in the Kamioka mine in Japan. Besides the cryogenic test masses, KAGRA will also rely on room temperature optics which will hang at the bottom of vibration isolation chains. The payload of each chain comprises an optic, a system to align it, and an active feedback system to damp the resonant motion of the suspension itself. This article describes the performance of a payload prototype that was assembled and tested in vacuum at the TAMA300 site at the NAOJ in Mitaka, Tokyo. We describe the mechanical components of the payload prototype and their functionality. A description of the active components of the feedback system and their capabilities is also given. The performance of the active system is illustrated by measuring the quality factors of some of the resonances of the suspension. Finally, the alignment capabilities offered by the payload are reported.
    Language English
    Publishing date 2016-03
    Publishing country United States
    Document type Journal Article
    ZDB-ID 209865-9
    ISSN 1089-7623 ; 0034-6748
    ISSN (online) 1089-7623
    ISSN 0034-6748
    DOI 10.1063/1.4942909
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: [A case of hypereosinophilic syndrome associated with consciousness disorder and hemiparesis].

    Haraoka, H / Sato, H / Kouda, S / Mitsuwa, M / Agatsuma, K / Shinoura, A

    Nihon Naika Gakkai zasshi. The Journal of the Japanese Society of Internal Medicine

    1990  Volume 79, Issue 2, Page(s) 233–234

    MeSH term(s) Aged ; Cognition Disorders/etiology ; Consciousness Disorders/drug therapy ; Consciousness Disorders/etiology ; Eosinophilia/complications ; Eosinophilia/drug therapy ; Hemiplegia/drug therapy ; Hemiplegia/etiology ; Humans ; Male ; Prednisolone/administration & dosage
    Chemical Substances Prednisolone (9PHQ9Y1OLM)
    Language Japanese
    Publishing date 1990-02-10
    Publishing country Japan
    Document type Case Reports ; Journal Article
    ZDB-ID 952816-7
    ISSN 1883-2083 ; 0021-5384
    ISSN (online) 1883-2083
    ISSN 0021-5384
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    In stock of ZB MED Cologne/Königswinter

    Zs.B 594: Show issues Location:
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  7. Article ; Online: Reduction of thermal fluctuations in a cryogenic laser interferometric gravitational wave detector.

    Uchiyama, Takashi / Miyoki, Shinji / Telada, Souichi / Yamamoto, Kazuhiro / Ohashi, Masatake / Agatsuma, Kazuhiro / Arai, Koji / Fujimoto, Masa-Katsu / Haruyama, Tomiyoshi / Kawamura, Seiji / Miyakawa, Osamu / Ohishi, Naoko / Saito, Takanori / Shintomi, Takakazu / Suzuki, Toshikazu / Takahashi, Ryutaro / Tatsumi, Daisuke

    Physical review letters

    2012  Volume 108, Issue 14, Page(s) 141101

    Abstract: The thermal fluctuation of mirror surfaces is the fundamental limitation for interferometric gravitational wave (GW) detectors. Here, we experimentally demonstrate for the first time a reduction in a mirror's thermal fluctuation in a GW detector with ... ...

    Abstract The thermal fluctuation of mirror surfaces is the fundamental limitation for interferometric gravitational wave (GW) detectors. Here, we experimentally demonstrate for the first time a reduction in a mirror's thermal fluctuation in a GW detector with sapphire mirrors from the Cryogenic Laser Interferometer Observatory at 17 and 18 K. The detector sensitivity, which was limited by the mirror's thermal fluctuation at room temperature, was improved in the frequency range of 90 to 240 Hz by cooling the mirrors. The improved sensitivity reached a maximum of 2.2×10(-19) m/√Hz at 165 Hz.
    Language English
    Publishing date 2012-04-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.108.141101
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  8. Article: Hypolipidemic action of a new aryloxy compound (S-8527) in rats.

    Toki, K / Nakamura, Y / Agatsuma, K / Nakatani, H / Aono, S

    Atherosclerosis

    1973  Volume 18, Issue 1, Page(s) 101–108

    MeSH term(s) Administration, Oral ; Animals ; Body Weight ; Cholesterol/metabolism ; Clofibrate/pharmacology ; Cyclohexanes/administration & dosage ; Cyclohexanes/pharmacology ; Lipid Metabolism ; Lipids/blood ; Liver/metabolism ; Male ; Organ Size ; Rats ; Sucrose ; Triglycerides/metabolism
    Chemical Substances Cyclohexanes ; Lipids ; Triglycerides ; Sucrose (57-50-1) ; Cholesterol (97C5T2UQ7J) ; Clofibrate (HPN91K7FU3)
    Language English
    Publishing date 1973-07
    Publishing country Ireland
    Document type Journal Article
    ZDB-ID 80061-2
    ISSN 1879-1484 ; 0021-9150
    ISSN (online) 1879-1484
    ISSN 0021-9150
    DOI 10.1016/0021-9150(73)90121-4
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    Zs.A 226: Show issues Location:
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  9. Article: Structure and absolute configuration of faurinone

    Hikino, H / Hikino, Y / Agatsuma, K / Takemoto, T

    Chemical & pharmaceutical bulletin Sept 1968, 16(9)

    1968  

    Keywords Plant Science and Plant Products ; plants ; botany
    Language English
    Dates of publication 1968-09
    Size p. 1779-1783.
    Document type Article
    Note Valeriana spp.
    ZDB-ID 213307-6
    ISSN 1347-5223 ; 0009-2363
    ISSN (online) 1347-5223
    ISSN 0009-2363
    Database NAL-Catalogue (AGRICOLA)

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    Zs.A 770: Show issues Location:
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  10. Article: Sesquiterpenoids. XLVII. Structure, configuration, conformation, and thermal rearrangement of furanodienone, isofuranodienone, curzerenone, epicurzerenone, and pyrocurzerenone, sesquiterpenoids of Curcuma zedoaria

    Hikino, H / Konno, C / Agatsuma, K / Takemoto, T / Horibe, I / Tori, K / Ueyama, M / Takeda, K

    1975, 5

    1975  

    Keywords plant physiology ; plant biochemistry
    Language English
    Size p. 478-484.
    Document type Article
    Database NAL-Catalogue (AGRICOLA)

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