1,721,717 research outputs found
Audiovisual preservation strategies, data models and value-chains
No full textThis is a report on preservation strategies, models and value-chains for digital file-based audiovisual content. The report includes: (a)current and emerging value-chains and business-models for audiovisual preservation;(b) a comparison of preservation strategies for audiovisual content including their strengths and weaknesses, and(c) a review of current preservation metadata models, and requirements for extension to support audiovisual files
Poiesis or Perish: Killing Me, Navigating Serious Leisure Guilt Syndrome Whilst Making Sporting Memories.
No full textButterflies (Lepidoptera: Papilionoidea) of Mount Kilimanjaro: Nymphalidae subfamily Helconiinae
No full textLiseki, Steven D., Vane-Wright, Richard I. (2018): Butterflies (Lepidoptera: Papilionoidea) of Mount Kilimanjaro: Nymphalidae subfamily Helconiinae. Journal of Natural History 52 (39-40): 2511-2552, DOI: 10.1080/00222933.2018.1539780, URL: http://dx.doi.org/10.1080/00222933.2018.153978
Butterflies (Lepidoptera: Papilionoidea) of Mount Kilimanjaro: Nymphalidae subfamilies Libytheinae, Danainae, Satyrinae and Charaxinae
No full textLiseki, Steven D., Vane-Wright, Richard I. (2015): Butterflies (Lepidoptera: Papilionoidea) of Mount Kilimanjaro: Nymphalidae subfamilies Libytheinae, Danainae, Satyrinae and Charaxinae. Journal of Natural History 50: 865-904, DOI: 10.1080/00222933.2015.1091106, URL: http://dx.doi.org/10.1080/00222933.2015.109110
An investigation of speech synthesis parameters
No full textThe model of speech production generally used in speech synthesis is that of a source modified by a digital filter. The major difference between a number of models is the form of the digital filter. The purpose of this research is to compare the properties of these filters when used for speech synthesis. Six models were investigated: (1) series resonance; (2) direct form; (3) reflection coefficients; (4) area function; (5) parallel resonance; and (6) a simple articulatory model. Types (2,3,4) are three varieties of linear predictive coding (LPC) parameters. There are five parts to the investigation: (1) an historical survey of models for speech synthesis and their problems; (2) a formal description of the models and their analytical relationships; (3) an objective assessment of the behaviour of the models during interpolation; (4) measurement of intelligibility (using a FAAF test); and (5) measurement of naturalness. Principal results are: synthesizer types (1) to (4) are all-pole models, formally equivalent in the steady state. But when the parameters of any of the models are interpolated, consequences for motion of vocal tract resonances (formants) differ. These differences exceed the discrimination limen for formant frequency, and make a small but statistically significant difference to intelligibility, but not to naturalness. Simple linear interpolation was found to be as good as cosine or piecewise-linear interpolation. Complete lack of interpolation reduced intelligibility by 30%. Finally, the synthesis studied achieved as few place-of-articulation errors as did LPC speech, indicating that intelligibility was limited not by parameter and transition type, but by other factors such as the excitation signal, phoneme target values, and durations
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Digital preservation strategies for AV content
No full textThe mass digitisation of analogue archive holdings plus the transition to tapeless production for new content means AV archives inevitably face the prospect of file-based archiving solutions using IT storage technology. But what is the long-term Total Cost of Ownership (TCO) of these systems, which file formats should be used, what storage technologies make sense, what are the risks involved, what is the additional cost of managing these risks, and what new software approaches can be applied? These are all issues being explored by major broadcasters, national archives and technology specialists in the European PrestoPrime project and the UK AVATAR-m project
Digital Preservation Strategies: the cost of risk of loss
No full textThe mass digitization of analogue archive holdings and the transition to tapeless production for new content mean that audiovisual (AV) archives now face the prospect of file-based archiving solutions using information technology (IT) storage methods. However, many important factors in this process remain unknown. What is the long-term total cost of ownership (TCO) of these systems, which file formats should be used, what storage technologies make sense, what are the risks involved, what is the additional cost of managing these risks, and what new software approaches can be applied? These issues are being explored by major broadcasters, national archives, and technology specialists in the PrestoPrime and AVATAR-m projects
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