Long-term preservation of software components is a key aspect of preservation of data, as software required for processing and analyzing data also needs to be preserved in order to maintain the re-usability of data in future. However, software preservation to date is a relatively underexplored topic of research and frequently seen as a secondary activity, mainly due to the inherent complexity o...

conclusions preservation of mitral annulus and papillary muscle continuity may enhance post- mvr cardiac performance with low mortality and morbidity rates. the risk of pvd was not significantly higher than conventional mvr in our series. results the improvement of functional status was seen in almost all survivors but was more obvious in the group i. in early follow-up, 56.4% of group i cases ...

Today, more and more information is being produced in a digital form. In addition to this so-called born-digital content, material that was produced to exist in an analogue form is now being digitised both for preservation and for easier access. This digital information comes in an ever greater variety of formats, many of which are relatively short-lived. Newer versions of the same software are...

The emergence of the cloud and advanced object-based storage services provides opportunities to support novel models for long term preservation of digital assets. Among the benefits of this approach is leveraging the cloud’s inherent scalability and redundancy to dynamically adapt to evolving needs of digital preservation. Preservation DataStores in the Cloud (PDS Cloud) is an OAIS-based preser...

We investigate modular properties of term rewriting systems, the basic operational formalism for equational speciications. First we study suucient conditions for the preservation of the termination property under disjoint (and more general) combinations of term rewriting systems. By means of a reened analysis of existing approaches we show how to prove several new asymmetric preservation result...

A modification of the Lecompte operation is reported in which the pulmonary valve is preserved. This technique is applicable in certain anomalies of ventriculoarterial connection with ventricular septal defect and subpulmonary stenosis. The main advantage of this modification, besides preservation of growth potential of the translocated pulmonary artery, consists of preservation of pulmonary va...

Chen (2001) coined the term ‘digital preservation paradox’ to describe a philosophy of preservation management that recognises change as a cornerstone of managing digital records for permanence. Paradox also surrounds use of the terms ‘structured’ and ‘unstructured’. As more and more so-called ‘unstructured’ information sources are generated from ‘structured’ repositories, preservation planning...