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Life expectancy for digital data supports: what is the risk that data we wish to save may one day be erased?
"Metallurgy, science and engineering”, a joint Report by the French Academy of Sciences, and the National Academy of Technologies of France. Ed. EDP Sciences, Jan.2011
Metallurgy, science and engineering, a joint Report by the French Academy of Sciences, and the National Academy of Technologies of France
Ed. EDP Sciences, January 2011

Jan.14, 2011
Moderators:
Prof. Yves QUERE, Member of the Academy of Sciences and Prof. André PINEAU, NATF Fellow.
Résumé
If we can readily agree that the metallurgical industries are inevitably being reorganised into ‘world class’ sized entities, we must also do everything in our power to prevent this global trend weakening France’s position in this key sector. If the major French actors in the metallurgical sector cannot continue as they were able to do to recently, to draw on the excellent results of French public R&D and higher education schemes, they will simply move elsewhere, outside France. What would be worse in this event would be a loss of ‘substance’ that would seriously penalise France’s SME companies.
The National Academy of Technologies of France (NATF) and the French Academy of Sciences have decided to present their joint analysis of the current status in France, drafted by a group of experts moderated by Prof. André PINEAU, NATF Fellow and Prof. Yves QUERE, Member of the Academy of Sciences.
The analysis, which is a synthetic overview, completed with several digitised appendices, gives a first description of Metallurgy as a science, i.e., a science per se, with strong links to the engineering science, viz., metallurgical engineering. The joint academic group then establishes a status diagnosis, not only for the major industrial sectors concerned but also in the area of Research and Higher Education. The ambition we could entertain is that Metallurgy is recognised as a scientific speciality per se, among the numerous other fields in Industry where metallurgy is a source for progress and a reservoir for future employment; and likewise to draw attention to the fact that it takes time to build up the competences, whether scientific or technical, that can be destroyed so easily.
The Report also shows how Metallurgy in France has lost a large part of its substance, partly because of the multiple recent industrial reorganisation schemes and partly because the academic world is no longer attracted to this area, because metallurgy is not seen as “fashionable”. Urgent measures need to be taken in higher education and industrial research, in correctly informing the public at large, or making the actors and the policy makers aware of the issue at stake.
Given the seriousness of the trends observed, that impact notably and negatively on employment, on skills reservoirs, on R&D, … the two Academies propose that public and private policy makers adopt a strategy that the authors set out in a set of recommendations: the current status is given for each domain along with the directions that could be chosen to ensure scientific and applied development.
Were Franceto forego its pole position in Metallurgy would be dangerous; to seek to become a leader is a challenge that lies before us. We are now at this cross-road – and probably ‘condemned’ to succeed.
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Biennial Report on Science and Technology N°31 [RST reports, decided initiated in 1998]Éditions EDP Sciences – January, 2011 - 27,00 €
Life expectancy for digital data supports: what is the risk that data we wish to save may one day be erased?
Edp Sciences : April 2010, 106 pp.
Life expectancy for digital data supports: what is the risk that data we wish to save may one day be erased?
Joint report by the NATF and the <placetype w:st="on">Academy</placetype> of <placename w:st="on">Sciences</placename> of <country-region w:st="on"><place w:st="on">France</place></country-region>, April 2010
Why should we pay any attention to long-term preservation of digital data, at a time when digital storage capacities have never been so abundant or so cheap?
This question leads to a point that is becoming more and more relevant: our societies today generate ever-increasing amounts of information, while, at the same time, the expected operational life of the supports available has never been so short, relatively speaking. Short-term data storage or safeguarding processes do not raise any particular questions. In contradistinction, archiving over several decades or even centuries raises a totally different issue, inasmuch as the material used for the digital support usually has a life expectancy of between 5 to 10 years, as an approximation.
Bearing in mind that the technical evolution of support materials and processes is difficult to foresee, only a constant follow-up of error-free data status enables you to guarantee long range archiving albeit with a high associated organisation and implementation cost.
Consequently, a joint Working Party was set up by the <place w:st="on"><placetype w:st="on">Academy</placetype> of <placename w:st="on">Sciences</placename></place> and the National Academy of Technologies of France (NATF), with the remit to make a status report on the subject. This report had a well-defined scope: indeed, this is a necessity given the numerous digressions possible. It focused on that part of the information world that conserves a long-term intrinsic value, whether in the form of personal documents, family souvenirs, medical data, etc., or public information (e.g., scientific data acquired from single, so-called “one-shot” experiments, etc.). Various strategies are discussed and a review is made of the different support processes, with a brief discussion of their respective strong and weak points. The fourth part of the report assesses possible generalisation of an active strategy to meet the total requirements of Society. A closer look is made at recordable optical disks (RODs), for which a series of disturbing control measurements have been carried out recently. The authors propose several routes that could lead to far better life expectancy of RODs and make 4 recommendations so that users become aware of the problem in general and also of possible solutions.
Erich SPITZ, Chair of this WP, Fellow of the Academy of Sciences and NATF; Franck LALOE, WP Minute-Writer CNRS / École normale supérieure, and Jean-Charles HOURCADE, Fellow of NATF.
Contents (pdf 56 Ko) Table of contents, in French
Introduction (pdf 104 Ko) Introduction, in French and English.
Conclusion and recommandations (pdf 141 Ko) Conclusion and Recommendations
Press conference (pdf 33 Ko) Press conference March 29, 2010
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"Metallurgy, science and engineering”, a joint Report by the French Academy of Sciences, and the National Academy of Technologies of France. Ed. EDP Sciences, Jan.2011