Global ETD Search
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Showing 1 to 14 of 14 for “"Zipf"”.
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Video Popularity Metrics and Bubble Cache Eviction Algorithm Analysis
… performed. This was done to assess which model, Zipf or Zipf-Mandelbrot, is best suited to replicate video popularity distributions and the results of these tests conclude that Zipf-Mandelbrot is the most appropriate model to replicate video popularity distributions. The work concludes that the …
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The SUN Action database : collecting and analyzing typical actions for visual scene types
… of phrases is shown to be heavy-tailed and Zipf-like, whereas the distribution of semantic roots is not Zipf-like. Categories strongly associated with particular tasks or actions are shown to have lower overall diversity of responses. A hierarchical clustering analysis reveals a …
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The Lexicon is Shaped for Incremental Processing in a Noisy Channel
… things, to benefit efficient communication (Zipf, 1949; Köhler, 1987; Gibson et al., 2019). One important area of a language’s grammar is its lexicon, or set of words and their corresponding phonological forms, and there is a great deal of evidence that the lexicons of the world’s languages …
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BRAPCI: o panorama da conservação, preservação e restauração de documentos no Brasil
… according to the laws of Bradford, Lotka and Zipf. The study counted 54 articles written by 95 different authors, who contemplated the issue between the years of 1995 and 2015. It also identifies the predominance of collective authorship of the works and observes the variation in the number of …
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Bucketization Techniques for Encrypted Databases: Quantifying the Impact of Query Distributions
… network access patterns reflect a non-uniform or Zipf-like trend. If query access is non-uniform, existing techniques may be subject to substantial performance degradation. In order to evaluate that possibility, this thesis presents new bucketization technique, Query Sensitive Bucketization (QSB), …
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Mineral ecology and network analysis of chromium, platinum, gold and palladium
… Several functions such as the finite Zipf-Mandelbrot (fZM), chord diagrams and mineral network diagrams, processed data and provided information on the estimation of minerals at different localities and interrelationships between chromium, platinum, gold and palladium-bearing minerals. …
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Functionalism, Lexical Contrast And Sound Change
… literature, like the principle of least effort (Zipf 1939) and the minimization of entropy loss (Hockett 1967), have not been related to the literature on language acquisition, with few exceptions.In this work, I address this question by formalizing a model of sound change over time, in order to …
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Statistical studies of patents literature
… studies include the application of Bradford-Zipf plots, other productivity studies and Vector Analysis to patents. Whilst previous studies on journal literature have investigated the applicability of frequency distributions as measures of author productivity, this study has for the first time …
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On inference about rare events
… natural language modeling, where one often has Zipf law behavior. We then study the strong consistency of estimators, in the sense of ratios converging to one. We first show that the Good-Turing estimator is not universally consistent. We then use Karamata's theory of regular variation to prove …
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Complex adaptive systems based data integration : theory and applications
… Sowa's Meaning Preservation framework and Zipf distributions of words and meanings. Using the theory, the attributes, and their measures, this research proposes a framework for objectively evaluating the suitability of any data definition language with respect to degrees of automatic data …
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Distributed content collection and rank aggregation
… generated by a Plackett-Luce ranking model with Zipf popularity distribution. We establish a performance upper bound and use intuition provided by the bound to design recommendation strategies with a range of complexity. Among these, the direct recommendation rule emerges as being particularly …
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Essays in dynamic general equilibrium
… approximately equal to one (the so-called "Zipf distribution"). The third chapter, "Racing: when should we handicap the advantaged competitor?" studies dynamic competitions, for example R&D competitions used in the second chapters. Two competitors with different abilities engage in a …
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A Discrete Pareto Distribution on Positive Integers
The Zipf's law is a standard discrete power-law probability distributions, often thought of as a discrete counterpart of the Pareto distribution. Here we study an alternative discrete Pareto distribution, using the general approach of discretizing a continuous distribution. We obtain several …