The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Brian W. Kernighan - One of the best experts on this subject based on the ideXlab platform.
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revisiting a summer vacation digital restoration and typesetter forensics
Document Engineering, 2013Co-Authors: Steven R Bagley, David F Brailsford, Brian W. KernighanAbstract:In 1979 the Computing Science Research Center ('Center 127') at Bell Laboratories bought a Linotron 202 typesetter from the Mergenthaler company. This was a 'third generation' digital machine that used a CRT to image characters onto photographic paper. The intent was to use existing Linotype fonts and also to develop new ones to exploit the 202's line-drawing capabilities. Use of the 202 was hindered by Mergenthaler's refusal to reveal the inner structure and encoding mechanisms of the font files. The particular 202 was further dogged by extreme hardware and software unreliability. A memorandum describing the experience was written in early 1980 but was deemed to be too "sensitive" to release. The original troff input for the memorandum exists and now, more than 30 years later, the memorandum can be released. However, the only available record of its visual appearance was a poor-quality scanned photocopy of the original printed version. This paper details our efforts in rebuilding a faithful retypeset replica of the original memorandum, given that the Linotron 202 disappeared long ago, and that this episode at Bell Labs occurred 5 years before the dawn of PostScript (and later PDF) as de facto standards for digital Document Preservation. The paper concludes with some lessons for digital archiving policy drawn from this rebuilding exercise.
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ACM Symposium on Document Engineering - Revisiting a summer vacation: digital restoration and typesetter forensics
Proceedings of the 2013 ACM symposium on Document engineering, 2013Co-Authors: Steven R Bagley, David F Brailsford, Brian W. KernighanAbstract:In 1979 the Computing Science Research Center ('Center 127') at Bell Laboratories bought a Linotron 202 typesetter from the Mergenthaler company. This was a 'third generation' digital machine that used a CRT to image characters onto photographic paper. The intent was to use existing Linotype fonts and also to develop new ones to exploit the 202's line-drawing capabilities. Use of the 202 was hindered by Mergenthaler's refusal to reveal the inner structure and encoding mechanisms of the font files. The particular 202 was further dogged by extreme hardware and software unreliability. A memorandum describing the experience was written in early 1980 but was deemed to be too "sensitive" to release. The original troff input for the memorandum exists and now, more than 30 years later, the memorandum can be released. However, the only available record of its visual appearance was a poor-quality scanned photocopy of the original printed version. This paper details our efforts in rebuilding a faithful retypeset replica of the original memorandum, given that the Linotron 202 disappeared long ago, and that this episode at Bell Labs occurred 5 years before the dawn of PostScript (and later PDF) as de facto standards for digital Document Preservation. The paper concludes with some lessons for digital archiving policy drawn from this rebuilding exercise.
José Carlos Ramalho - One of the best experts on this subject based on the ideXlab platform.
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An intelligent decision support system for digital Preservation
International Journal on Digital Libraries, 2007Co-Authors: Miguel Ferreira, Ana Alice Baptista, José Carlos RamalhoAbstract:This paper describes a Service Oriented Architecture (SOA) based on Web services technology designed to assist cultural heritage institutions in the implementation of migration based Preservation interventions. The proposed SOA delivers a recommendation service and a method to carry out complex format migrations. The recommendation service is supported by three evaluation components that assess the quality of every migration intervention in terms of its performance (Migration Broker), suitability of involved formats (Format Evaluator) and data loss (Object Evaluator). Throughout the paper the whole workflow between these three components is explained in detail as well as the most relevant tasks that are carried out internally in each of them. The proposed system is also able to produce Preservation metadata that can be used by client institutions to Document Preservation interventions and retain objects’ authenticity. Although the primary goal of this SOA is the implementation of migration based Preservation interventions, it can also be used for other purposes such as comparing file formats or evaluating the performance of conversion applications.
Steven R Bagley - One of the best experts on this subject based on the ideXlab platform.
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revisiting a summer vacation digital restoration and typesetter forensics
Document Engineering, 2013Co-Authors: Steven R Bagley, David F Brailsford, Brian W. KernighanAbstract:In 1979 the Computing Science Research Center ('Center 127') at Bell Laboratories bought a Linotron 202 typesetter from the Mergenthaler company. This was a 'third generation' digital machine that used a CRT to image characters onto photographic paper. The intent was to use existing Linotype fonts and also to develop new ones to exploit the 202's line-drawing capabilities. Use of the 202 was hindered by Mergenthaler's refusal to reveal the inner structure and encoding mechanisms of the font files. The particular 202 was further dogged by extreme hardware and software unreliability. A memorandum describing the experience was written in early 1980 but was deemed to be too "sensitive" to release. The original troff input for the memorandum exists and now, more than 30 years later, the memorandum can be released. However, the only available record of its visual appearance was a poor-quality scanned photocopy of the original printed version. This paper details our efforts in rebuilding a faithful retypeset replica of the original memorandum, given that the Linotron 202 disappeared long ago, and that this episode at Bell Labs occurred 5 years before the dawn of PostScript (and later PDF) as de facto standards for digital Document Preservation. The paper concludes with some lessons for digital archiving policy drawn from this rebuilding exercise.
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ACM Symposium on Document Engineering - Revisiting a summer vacation: digital restoration and typesetter forensics
Proceedings of the 2013 ACM symposium on Document engineering, 2013Co-Authors: Steven R Bagley, David F Brailsford, Brian W. KernighanAbstract:In 1979 the Computing Science Research Center ('Center 127') at Bell Laboratories bought a Linotron 202 typesetter from the Mergenthaler company. This was a 'third generation' digital machine that used a CRT to image characters onto photographic paper. The intent was to use existing Linotype fonts and also to develop new ones to exploit the 202's line-drawing capabilities. Use of the 202 was hindered by Mergenthaler's refusal to reveal the inner structure and encoding mechanisms of the font files. The particular 202 was further dogged by extreme hardware and software unreliability. A memorandum describing the experience was written in early 1980 but was deemed to be too "sensitive" to release. The original troff input for the memorandum exists and now, more than 30 years later, the memorandum can be released. However, the only available record of its visual appearance was a poor-quality scanned photocopy of the original printed version. This paper details our efforts in rebuilding a faithful retypeset replica of the original memorandum, given that the Linotron 202 disappeared long ago, and that this episode at Bell Labs occurred 5 years before the dawn of PostScript (and later PDF) as de facto standards for digital Document Preservation. The paper concludes with some lessons for digital archiving policy drawn from this rebuilding exercise.
Rea Devakos - One of the best experts on this subject based on the ideXlab platform.
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ontario government Documents repository d space pilot project
Oclc Systems & Services, 2008Co-Authors: Rea Devakos, Annemarie TothwaddellAbstract:Purpose – This paper aims to describe a project to increase access and longevity of electronic government Documents.Design/methodology/approach – The Ontario Legislative Library has partnered with the Ontario Council of University Libraries to extend the longevity and accessibility of electronic government Documents using DSpace.Findings – Digital repository software, such as DSpace, can be used to extend access to, and longevity of, special collections.Research limitations/implications – The case study may be specific to local practices and the institutions involved.Practical implications – The consortial approach builds on existing practices to build a cost effective and sustainable service.Originality/value – Many projects in electronic government Document Preservation and access require large investments. This project leverages existing practices and resources.
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Ontario Government Documents repository D‐Space pilot project
OCLC Systems & Services: International digital library perspectives, 2008Co-Authors: Rea Devakos, Annemarie Toth‐waddellAbstract:Purpose – This paper aims to describe a project to increase access and longevity of electronic government Documents.Design/methodology/approach – The Ontario Legislative Library has partnered with the Ontario Council of University Libraries to extend the longevity and accessibility of electronic government Documents using DSpace.Findings – Digital repository software, such as DSpace, can be used to extend access to, and longevity of, special collections.Research limitations/implications – The case study may be specific to local practices and the institutions involved.Practical implications – The consortial approach builds on existing practices to build a cost effective and sustainable service.Originality/value – Many projects in electronic government Document Preservation and access require large investments. This project leverages existing practices and resources.
Aletéia Patrícia F. De Araújo - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Performance, Availability and Scalability of a Private Cloud Storage Infrastructure Service for Document Preservation
Theoretical and Applied Informatics, 2017Co-Authors: Aletéia Patrícia F. De Araújo, Antonio M. A. Ferreira, André C. DrummondAbstract:Cloud computing platforms provide easy and transparent access to a company’s storage infrastructure through services. it allows users to store their data at remote disks and access them anytime from any place. On the other hand, with the deployment of Electronic Document Management (EDM) to manage the insertion, sharing, and retrieval of information assigned to a digital Document it is necessary that the processes of searching, indexing and storage of digital Documents are carried out efficiently. Besides the use of computational tools focused on archiving digital Documents, the storage solution must provide reliability and authenticity on the availability of digital Documents. With object storage systems being increasingly accepted as replacements for traditional file or block systems and recognized as a preferred way to expose one’s storage infrastructure, it is important to effectively measure the performance of these services. This paper addresses the deployment project of a content-addressable storage infrastructure in a large company and conducts performance, availability and scalability evaluation to measure the gains in r/w access of the proposed solution in different scenarios proposed.
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Performance evaluation of a private cloud storage infrastructure service for Document Preservation
2017 12th Iberian Conference on Information Systems and Technologies (CISTI), 2017Co-Authors: Antonio M. A. Ferreira, André C. Drummond, Aletéia Patrícia F. De AraújoAbstract:Cloud computing platforms provide easy and transparent access to a company's storage infrastructure through services. Commonly known as Storage as a Service (STaaS), it allows users to store their data at remote disks and access them anytime from any place. On the other hand, with the deployment of Electronic Document Management (EDM) to manage the insertion, sharing, and retrieval of information assigned to a digital Document it is necessary that the processes of searching, indexing and storage of digital Documents are carried out efficiently. Besides the use of computational tools focused on archiving digital Documents, the storage solution must provide reliability and authenticity on the availability of digital Documents. In this scenario, this paper addresses the deployment project of a content-addressable storage infrastructure in a large company and conducts performance evaluation to measure the gains in availability, r/w access and scalability of the proposed solution.