The OAIS model has gained widespread acceptance as the fundamental design reference model for an archival system by the digital library community. One of its core entities is Preservation Planning, for which central functional entities are given yet without every detail breaking down into activities requirements. The Planets Preservation Planning approach addresses this by providing a way to ma...

In 2006 the Portuguese National Archives (DirectorateGeneral of the Portuguese Archives) engaged in the development of an OAIS compatible digital repository system for long-term preservation of digital material. Simultaneously, at the University of Minho a project called CRiB was being devised which aimed at the development of a wholesome set of services to aid digital preservation. Among those...

Digital objects have become the dominant way that we create, shape, and exchange information. They form a central part of our economy, and are becoming increasingly important for a longer period of time. The evergrowing heterogeneity and complexity of digital object formats together with rapid technological changes turn the preservation of digital information into a pressing challenge. The chal...

Topological band insulators and (semi-) metals can arise out of atomic when the hopping strength between electrons increases. Such topological phases are separated from insulator by a bulk gap closing. In this work, we show that in many (magnetic) space groups, crystals with certain Wyckoff positions orbitals being occupied must be semimetal or limit, e.g. is infinite weak but not vanishing, wh...

• The preservation as developed by the main international projects in the sector (InterPARES and OAIS) requires that the elements related to the accuracy, the reliability and the completeness of the information objects are captured and maintained in the repositories to allow the users to evaluate their (OAIS compliant) able to describe the dynamic profile of the authenticity as a a ¤ £ ¤ " § " ...

Within the past few years, there has been a steady, substantial growth of interest in “long-term” archiving of digital data. This problem is particularly acute in many branches of engineering design, where cycles of technological obsolescence in supporting tools happen much more rapidly than those of designed products. Capturing and preserving design knowledge through these cycles is a major ch...

Metadata plays a crucial role in supporting the discovery, understanding and management of the large product data collections generated throughout all phases of the product lifecycle. Product data models are annotated with metadata which represent meaning in conformance with evolving metadata schemas while, for business, contractual and legal reasons, these semantically enriched models are inge...

The Danish Ministry of Culture has funded a project to set up a model for costing preservation of digital materials held by national cultural heritage institutions. The overall objective of the project was to increase cost effectiveness of digital preservation activities and to provide a basis for comparing and estimating future cost requirements for digital preservation. In this study we descr...