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Alignment film abrasion caused by rubbing

  • Kamada, Hirokazu;Ihara, Ikuo;Kim, Hong-Dae;Nakayama, Tadachika;Kimura, Munehiro;Akahane, Tadashi
    • Journal of Information Display
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    • 제12권4호
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    • pp.173-177
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    • 2011
  • The alignment film abrasion caused by the rubbing process was quantitatively evaluated via atomic-force microscopy (AFM). First, a patterned alignment film structure, which was molded through the imprint method, was artificially formed. Then, the surface topography of the alignment film was evaluated via AFM after rubbing, and the degree of abrasion of the alignment film was estimated by subtracting the value after rubbing from the value before rubbing. It was recognized that the degree of abrasion increased with an increase in the rubbing strength. The relationship between the number of rubbing cycles and the degree of abrasion of the alignment film was also estimated.

Evaluation of LCD device parameters and rubbed surface of Polyimide by means of renormalized spectroscopic ellipsometry

  • Kimura, Munehiro;Hasegawa, G.;Sakamoto, H.;Akahane, T.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2006년도 6th International Meeting on Information Display
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    • pp.1715-1718
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    • 2006
  • Evaluating method of the device parameters of liquid crystal display (LCD) by means of the renormalized transmission spectroscopic ellipsometry is demonstrated. Dielectric and elastic constant, threshold voltage, pretilt angle, cell gap and Anchoring strength coefficients can be evaluated from the measurement of ellipsometric parameters measured by the symmetrically oblique incidence transmission ellipsometry (SOITE). Furthermore, rapid evaluating method for rubbed polyimide film is also demonstrated.

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Multifunction Integrasted Ceramic Based Nanocomposites

  • Niihara, Koichi;Nakayama, Tadachika;Suematsu, Hisayuki;Sekino, Tohru;Kusunose, Takafumi
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.320-320
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    • 2006
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Protein Named Entity Identification Based on Probabilistic Features Derived from GENIA Corpus and Medical Text on the Web

  • Sumathipala, Sagara;Yamada, Koichi;Unehara, Muneyuki;Suzuki, Izumi
    • International Journal of Fuzzy Logic and Intelligent Systems
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    • 제15권2호
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    • pp.111-120
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    • 2015
  • Protein named entity identification is one of the most essential and fundamental predecessor for extracting information about protein-protein interactions from biomedical literature. In this paper, we explore the use of abstracts of biomedical literature in MEDLINE for protein name identification and present the results of the conducted experiments. We present a robust and effective approach to classify biomedical named entities into protein and non-protein classes, based on a rich set of features: orthographic, keyword, morphological and newly introduced Protein-Score features. Our procedure shows significant performance in the experiments on GENIA corpus using Random Forest, achieving the highest values of precision 92.7%, recall 91.7%, and F-measure 92.2% for protein identification, while reducing the training and testing time significantly.

Electro-Optical Characteristics and Responce time of In-plane Switching Twisted Nematic Mode

  • Oka, S.;Kobayashi, K.;Iwamoto, Y.;Toko, Y.;Takahashi, T.;Kimura, M.;Akahane, T.
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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    • pp.531-534
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    • 2003
  • The electro-optical characteristics of the In-Plane switching Twisted nematic (IT) mode were studied. The advantage of this mode is not only the wide viewing angle characteristics without adopting any compensation films, but also the wide cell gap error margin. The electro-optical characteristics of IT mode were evaluated by the experiments and computer simulation. In this paper, we studied the viewing angle characteristics, color-shift and response time.

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Evaluation of the Surface Anchoring Strength by Means of Renormalized Transmission Spectroscopic Ellipsometry

  • Kimura, Munehiro;Tanaka, Norihiko;Bansho, Ryota;Akahane, Tadashi
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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    • pp.191-194
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    • 2005
  • Evaluating methods of the polar and/or azimuthal anchoring strength coefficients by means of the renormalized transmission spectroscopic ellipsometry are demonstrated. The Anchoring strength coefficients can be evaluated from the measurement of ellipsometric parameters measured by the oblique incident transmission ellipsometry, where the effect of multiplebeam interference is eliminated. The device parameters such as the pretilt angle and cell gap can be determined simultaneously even in the case of the twisted nematic liquid crystal sample cells.

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Phase Modulation Homodyne Interferometer with a 10-pm Resolution Using a Tunable Laser Diode

  • Ishige, Masashi;Matsuura, Fumio;Kawasugi, Masaaki;Aketagawa, Masato
    • International Journal of Precision Engineering and Manufacturing
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    • 제8권2호
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    • pp.80-84
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    • 2007
  • We propose a new displacement measurement method using a phase modulation homodyne interferometer and a tunable laser diode as a light source to determine an arbitrary length with a resolution in the order of 10 pm. In the proposed instrument, the displacement of a movable mirror in the interferometer can be converted to a frequency shift of the tunable laser diode. We discuss the principles of the proposed method, the instrumentation, and the experimental results, and compare the proposed method with two commercial displacement sensors. The commercial sensors used are a heterodyne interferometer, the interpolation error of which is also measured, and a capacitive sensor.

Liquid crystal alignment on patterned-alignment films

  • Lias, Jais Bin;Oo, Thet Naing;Yazawa, Tomohiro;Kimura, Munehiro;Akahane, Tadashi
    • Journal of Information Display
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    • 제12권2호
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    • pp.101-107
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    • 2011
  • To come up with a bistable liquid crystal (LC) device using unpolarized UV light, single-step laser patterning on a photoalignment layer using a photomask was proposed to achieve an equilibrium configuration of LC molecules in contact with a periodically patterned substrate. The patterns were formed by stripes of alternating random planar and homeotropic anchoring on a submicrometer scale in the order of $0.5{\mu}m$. Two possible configurations of bistable LC cells that can be obtained by combining a micropatterned surface formed with alternating random-planar- and homeotropic-alignment with planar- or homeotropic-alignment surfaces were proposed. The alignment properties of the two proposed models were investigated, along with the microscopic switching behavior of micropatterned nematic LC cells.