Search Results:　 1-20 of 159

  • 1

    Analysis of Phase Multilevel Recording on Microholograms

    Ide Tatsuro , Mikami Hideharu , Osawa Kentaro , Watanabe Koichi

    … An optical phase multilevel recording technique using a microholographic system and phase-diversity homodyne detection for enhancement of optical disc capacity is investigated. … For comparison, phase signals from Blu-ray Disc read-only memory (BD-ROM) and Blu-ray Disc recordable (BD-R) media obtained by phase-diversity homodyne detection are experimentally evaluated. …

    Jpn J Appl Phys 50(9), 09ME01-09ME01-6, 2011-09-25

    The Japan Society of Applied Physics

  • 2

    Analysis of phase multi-level recording in microhologram  [in Japanese]

    IDE Tatsuro , MIKAMI Hideharu , OSAWA Kentaro , WATANABE Koichi

    … した位相多値記録再生方式の解析を行った.干渉縞の強度分布シフト量として位相信号を記録したマイクロホログラムから,位相ダイバーシティ・ホモダイン検出によって安定した位相信号が検出できることをシミュレーションにより示した.また,検出位相がピット構造の影響を受けやすいROMディスクの凹凸ピットに比べて,一様な記録媒体に体積記録を行うマイクロホログラムは位相記録に好適であることを明らかにした. …

    ITE Technical Report 35(12), 13-18, 2011-03-04

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  • 3

    Bit-Error-Rate Evaluation of Super-Resolution Near-Field Structure Read-Only Memory Discs with Semiconductive Material InSb

    Nakai Kenya , Ohmaki Masayuki , Takeshita Nobuo , Hyot Bérangère , André Bernard , Poupinet Ludovic

    … Bit-error-rate (bER) evaluation using hardware (H/W) evaluation system is described for super-resolution near-field structure (super-RENS) read-only-memory (ROM) discs fabricated with a semiconductor material, In–Sb, as the super-resolution active layer. … bER on the order of $10^{-5}$ below a criterion of $3.0\times 10^{-4}$ is obtained with the super-RENS ROM discs having random pattern data including a minimum pit length of 80 nm in partial response maximum likelihood of the $(1,2,2,1)$ type. …

    Jpn J Appl Phys 49(8), 08KE01-08KE01-4, 2010-08-25

    The Japan Society of Applied Physics

  • 4

    Playback System of Next Generation High-Density optical Disc : Playback of Multi-Channel High-Definition Video Contents  [in Japanese]

    OHMAKI Masayuki , NAKAI Kenya , TAKESHITA Nobuo , SHINODA Masahisa , HYOT Berangere , ANDRE Bernard , POUPINET Ludovic , SHIMA Takayuki , NAKANO Takashi , TOMINAGA Junji

    … Structure)方式ROM(Read-Only Memory)ディスクを作製し,又,高精細映像の再生システムを構築したことに関して述べる.このsuper-RENS方式ROMディスクを,転送レート72Mbpsに対応した再生システムを構築し,4チャンネルの高精細映像(ハイビジョン映像)コンテンツのシームレスな同時再生に成功した.これにより,super-RENS方式光ディスクの更なる高密度化の可能性が確認され,BD(Blu-ray Disc)を充分に超 …

    ITE Technical Report 34(1), 7-10, 2010-01-21

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  • 5

    Playback System of Next Generation High-Density Optical Disc : Playback of Multi-Channel High-Definition Video Contents  [in Japanese]

    OHMAKI Masayuki , NAKAI Kenya , TAKESHITA Nobuo , SHINODA Masahisa , HYOT Berangere , ANDRE Bernard , POUPINET Ludovic , SHIMA Takayuki , NAKANO Takashi , TOMINAGA Junji

    … Structure)方式ROM(Read-Only Memory)ディスクを作製し,又,高精細映像の再生システムを構築したことに関して述べる.このsuper-RENS方式ROMディスクを,転送レート72Mbpsに対応した再生システムを構築し,4チャンネルの高精細映像(ハイビジョン映像)コンテンツのシームレスな同時再生に成功した.これにより,super-RENS方式光ディスクの更なる高密度化の可能性が確認され,BD(Blu-ray Disc)を充分に超 …

    IEICE technical report. Magnetic recording 109(384), 7-10, 2010-01-14

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  • 6

    A Development of High Density Near-Field Optical Disc System  [in Japanese]

    TANAKA Hiroyuki , HORITA Masanori , KAWANO Eisaku , KANEGAE Tohru , MATSUI Yutaka , KATO Masahiro

    … 次世代大容量光ディスクの候補の一つとして,近接場光を用いた光ディスクシステムが提案されている.我々は,この光ディスクシステムのプロトタイプを開発し、片面単層100GBのROMディスクにて良好な再生信号を得る事が出来た. …

    ITE Technical Report 33(33), 5-8, 2009-08-03

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  • 7

    Fast-Seeking Control for Two-Stage Actuator System in Optical Disc Drives  [in Japanese]

    OKUYAMA Atsushi

    … A DVD-ROM drive is tested to confirm that the control system we propose significantly improves the seeking capabilities. …

    IEEJ Transactions on Industry Applications 129(4), 368-374, 2009-04-01

    J-STAGE CrossRef References (9) Cited by (2)

  • 8

    Bit-Error-Rate Evaluation of Energy-Gap-Induced Super-Resolution Read-Only-Memory Disc with Dual-Layer Structure

    Yamada Hirohisa , Hayashi Tetsuya , Yamamoto Masaki , Harada Yasuhiro , Tajima Hideharu , Maeda Shigemi , Murakami Yoshiteru , Takahashi Akira

    … Practically available readout characteristics were obtained in a dual-layer energy-gap-induced super-resolution (EG-SR) read-only-memory (ROM) disc with an 80 gigabytes (GB) capacity. … Bit error rates better than $3.0\times 10^{-4}$ were obtained with a minimum readout power of approximately 1.6 mW in both layers using a Blu-ray Disc tester by a partial response maximum likelihood (PRML) detection method. …

    Jpn J Appl Phys 48(3), 03A067-03A067-3, 2009-03-25

    The Japan Society of Applied Physics

  • 9

    Layer Stack Design of High Density Read-Only-Memory Discs for Near-Field Systems using a Solid Immersion Lens

    Kitano Kazutoshi , Yamaguchi Atsushi , Miura Masahiro , Horikawa Kunihiko , Tagiri Takao , Muramatsu Eiji , Taniguchi Shoji , Yokogawa Fumihiko

    … For high numerical aperture (NA) near-field systems using a solid immersion lens, layer stack types of first-surface read-only-memory (ROM) discs have been investigated. … Therefore, vector diffraction simulation in consideration of these effects is indispensable for the optimization of the disc structures. … On the basis of the simulation results, we actually fabricated high-density ROM media. …

    Jpn J Appl Phys 48(3), 03A050-03A050-3, 2009-03-25

    The Japan Society of Applied Physics

  • 10

    Study of Interpolated Timing Recovery Phase-Locked Loop with Linearly Constrained Adaptive Prefilter for Higher-Density Optical Disc

    Kajiwara Yoshiyuki , Shiraishi Junya , Kobayashi Shoei , Yamagami Tamotsu

    … We have developed projection matrices that are suitable for Blu-ray disc (BD) drive systems by numerical simulation. … Results have shown that the LCAF improves the tilt margins of 30 gigabytes (GB) recordable BD (BD-R) and 33 GB BD read-only memory (BD-ROM) with a sufficient LMS adaptation stability. …

    Jpn J Appl Phys 48(3), 03A009-03A009-7, 2009-03-25

    The Japan Society of Applied Physics

  • 11

    Bit-Error-Rate-Based Evaluation of Energy-Gap-Induced Super-Resolution Read-Only-Memory Disc in Blu-ray Disc Optics

    Tajima Hideharu , Yamada Hirohisa , Hayashi Tetsuya , Yamamoto Masaki , Harada Yasuhiro , Mori Go , Akiyama Jun , Maeda Shigemi , Murakami Yoshiteru , Takahashi Akira

    … Bit error rate (bER) of an energy-gap-induced super-resolution (EG-SR) read-only-memory (ROM) disc with a zinc oxide (ZnO) film was measured in Blu-ray Disc (BD) optics by the partial response maximum likelihood (PRML) detection method. … The experimental capacity was 40 GB in a single-layered 120 mm disc, which was about 1.6 times as high as the commercially available BD with 25 GB capacity. …

    Jpn J Appl Phys 47(7), 6013-6015, 2008-07-25

    The Japan Society of Applied Physics

  • 12

    Super-Resolution Readout of 50 nm Read-Only-Memory Pits Using Optics Based on High-Definition Digital Versatile Disc

    Shima Takayuki , Nakano Takashi , Kurihara Kazuma , Kim Jooho , Tominaga Junji

    … ZnS–SiO2/Sb75Te25/ZnS–SiO2) and a read-only-memory (ROM) substrate with its pit wide in the radial direction (200 nm) are combined. …

    Jpn J Appl Phys 47(7), 5842-5844, 2008-07-25

    The Japan Society of Applied Physics Cited by (2)

  • 13

    Manufacturing Process for Low Cost Dual Layer Blu-ray Disc Read-Only Memory Media Based on the "All Spin Method"

    Ohno Eiji , Hisada Kazuya , Ito Eiichi , Tomekawa Yuko , Nishikiori Keiji , Hayashi Kazuhiro , Abe Shinya

    … To achieve low-cost Blu-ray disc (BD) media, a test line for dual layer media based on the "All Spin Method", which we have previously proposed, was fabricated. … Dual-layer BD read-only memory (BD-ROM) media were manufactured with a cycle time of 4 s, and the characteristics of the media were observed. … The All Spin Method is adaptable not only to the manufacture of BD-ROM but also BD-R (recordable) and BD-RE (rewritable), so it can contribute to decreasing the costs of all types of BD media. …

    Jpn J Appl Phys 47(7), 5509-5515, 2008-07-25

    The Japan Society of Applied Physics

  • 14

    Optical Recording Materials for Compact Disc  [in Japanese]

    SHODA Hisashi

    … They have many advanced features, such as high compatibility to ROM player because of their high reflectivity, as well as easy and low cost production by applying a simple design comprising a dye recording layer and a reflective layer, and by applying a spin-coating method to form the dye recording layer. …

    Journal of Synthetic Organic Chemistry, Japan 66(5), 468-476, 2008-05-01

    J-STAGE CrossRef References (40)

  • 15

    Experimental Analysis of Spinal Deformation Using a 6-Axis Material Testing Machine : 1st Report, Development of Testing Machine for Measurement of Spinal Deformation  [in Japanese]

    MOGI Mariko , INABA Tadashi , KASAI Yuichi , MASAOKA Takuya , KATO Takaya , MASUDA Takanori , FUJIWARA Motoyoshi , TOKUDA Masataka

    … In order to evaluate the influence of injury to the intervertebral disc, supraspinal ligament, interspinal ligament, and facet joint on the spinal deformation, we conducted a bending test in a total of 8 directions and a torsional test using the 6-axis material testing machine we developed for this study. … The study closely investigated changes in the range of motion (ROM) of the functional spinal unit (FSU) associated with injury using a FSU of the lumbar spines obtained from human cadavers. …

    Transactions of the Japan Society of Mechanical Engineers. A 74(740), 621-627, 2008-04-25

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  • 16

    Overview of Blu-ray Disc ROM Technology  [in Japanese]

    YAMAGAMI Tamotsu , KATO Motoki

    IPSJ Magazine 49(4), 422-434, 2008-04-15

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  • 17

    Fast-Settling Control for Optical Disc Drives  [in Japanese]

    OKUYAMA Atsushi

    … A fast-settling control method for the fine actuator system in an optical disc drive has been developed. … Tests with a 16x DVD-ROM drive experimentally confirm that the proposed settling control significantly improves the settling capability. …

    IEEJ Transactions on Industry Applications 128(3), 289-295, 2008-03-01

    J-STAGE CrossRef References (11) Cited by (1)

  • 18

    Evaluation of contraction pattern of trunk muscles in patients with chronic low back pain using surface electromyography  [in Japanese]

    MIURA Yuichiro , 福島 秀晃 , 森原 徹 , 鈴木 俊明

    腰椎椎間板ヘルニアと診断された慢性腰痛症患者2名に対し，歩行時における体幹筋の筋活動について表面筋電図を測定し，健常群と比較，検討した．症例Aでは内腹斜筋の筋活動は歩行周期を通して平坦化していた．また，腰背筋筋活動パターンは立脚期中期，遊脚期にも筋活動が増加し，多相性を呈した．常時腰背筋の筋緊張を高めることが脊柱可動性低下の一要因であると考えられた．症例Bにおける歩行時の腰背筋筋活動パターンは左側 …

    The Journal of Japanese Society of Lumbar Spine Disorders 14(1), 122-128, 2008

    J-STAGE Ichushi Web CrossRef

  • 19

    Blu-ray Discの世界 (特集 青色ROM光ディスク時代を迎えて(後編))  [in Japanese]

    大原 俊次

    O plus E 29(11), 1130-1135, 2007-11-00

  • 20

    New DPD Tracking Servo Method by Signal Processing for High-Density ROM Discs  [in Japanese]

    SHIRAISHI Junya , MARUYAMA Tsutomu , TAKEMOTO Yoshihiro , ICHIMURA Isao , KOBAYASHI Shoei

    … ゼロクロス検出不要なDPD方法を提案し、高密度多層ROMディスクでの改善効果を確認した。 …

    IEICE technical report. Component parts and materials 107(214), 19-23, 2007-09-07

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