12/26/2014

Mitsuru Irie
Production System Engineering major

1.Research
Research topic: Using optical discs for digital archives

Figure 1: Types of digital data storage devices and methods of saving data
FigureFigure 2:
2: Document
Document data
data life
life cycles
cycles andand storage
storage memory
memoryFigure 3: Operational model for long
long-term
term
term storage
storage ofof electronic
electronic documents
documents using
using optical
optical discs
discs

Exterior appearance
Digital data storage methods
Semiconductor memory
Solid-State
SolidDrive (SSD)
Charging and discharging electrical charges
Charge “1”Discharge “0”Magnetic memory
Hard Disk Drive (HDD)
Direction of magnetization
Optical memory
Pits

外観
ﾃﾞｼﾞﾀﾙ情報記録方法
半導体ﾒﾓﾘSolid State Drive (SSD)
電荷の充放電充電 “1”
放電 “0”
磁気ﾒﾓﾘ
Hard Disk Drive
磁化の方向
光ﾒﾓﾘ
凹凸ﾋﾟｯﾄ1

Cross section
Pit shapes

断面ﾋﾟｯﾄ形状
図2
作成
利用
保管
保存
使用頻度
半導体ﾒﾓﾘ(SSD)
磁気ﾒﾓﾘ(HDD)
光ﾒﾓﾘ(ODD)
保存年限
3 年—5 年—10 年—30 年
使用頻度 1%以下
6 か月
1年
10 年
図3
ｱｰｶｲﾌﾞ用光ﾃﾞｨｽｸｼｽﾃﾑ
長期保存ﾃﾞｰﾀ
一般ﾃﾞｰﾀ
汎用光ﾃﾞｨｽｸ
ｱｰｶｲﾌﾞ光ﾃﾞｨｽｸ
ｱｰｶｲﾌﾞ光ﾃﾞｨｽｸﾄﾞﾗｲﾌﾞ
管理台帳
定期検査
ﾏｲｸﾞﾚｰｼｮﾝ
媒体移行管理台帳

CreateUse
Save
Archive
Usage frequency
Semiconductor memory (SSD)
Magnetic memory (HDD)
Optical memory (ODD)
Storage periods
Three, five, ten and thirty years
Usage frequency 1% or lessSix months
One year
Ten years
Optical disc system for archiving
Data stored for long periods
General data
General-purpose optical discs
Optical discs for archiving
Optical disc drives for archiving
Management ledger
Periodic inspections
Migration
Management ledger for media migration

2.Featured published articles
1) Study of Statistical Analysis using Fisher Information for Life Expectancy, Mitsuru IRIE,
Toshio Suzuki､ Takao Ihashi and Yoshinobu Mitsuhashi, Technical digest of Internationalsymposium on optical memory, 124–125 (2014)
2) ISO/IEC standard: ISO/IEC 16963 2nd ed.: 2014, Test method for the estimation oflifetime of optical media for long-term data storage, Editors: Mitsuru IRIE､ MarkWorthington and Toshihiro SUGAYA
3) Reliability Evaluation Item of Optical Archival Storage in BD, Mitsuru IRIE､ Toshio
Suzuki､ Takao Ihashi and Yoshinobu Mitsuhashi, Technical digest of International
symposium on optical memory, 104-105 (2013)
4) Mitsuru Irie and Kunimaro Tanaka, The Search for Permanent Digital Data Archivingwith Optical Discs. Journal of Digital Practices, Vol. 1, No. 2 (pp. 71–76). 2010.
5) Mitsuru Irie, Akiyoshi Inoue and Isao Taniguchi, Current State of Longevity Evaluation
in Optical Disk, Journal of the Institute of Image Information and Television Engineers, Vol.
263, No. 11 (pp. 26–29). 2009.
6) Simple Estimating Method for Life Expectancy Using Re-sampling Statistical Analysis,
Mitsuru IRIE, Yoshihiro OKINO, Japanese Journal of Applied Physics, Vol. 47, No. 76035-–6038 (2008)
3. Main books
1) Zukai DVD Dokuhon (An Illustrated DVD Reader), Ohmsha, Ltd., September 2003.
2) DVD Gijutsu no Kihon to Shikumi (DVD Technology Basics and Mechanisms), Shuwa
System Co., Ltd., October 2005.
3) Saisentan Denshi Debaisu・Buhin ni Okeru Shinraisei Shiken・Hyoka (Cutting-EdgeMethods for Testing and Evaluating the Reliability of Electronic Devices and Parts).
Technical Information Institute Co., Ltd., November 2006.

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