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Record W1801211801

Fast Data Compression with Antidictionaries

2004· article· en· W1801211801 on OpenAlexaffabout
Michael Davidson, Lucian Ilie

Bibliographic record

VenueFundamenta Informaticae · 2004
Typearticle
Languageen
FieldComputer Science
TopicAlgorithms and Data Compression
Canadian institutionsWestern University
Fundersnot available
KeywordsCompression (physics)Computer scienceData compressionDe Bruijn sequenceAlgorithmOverhead (engineering)Quadratic equationData compression ratioCompressibilityUpper and lower boundsTheoretical computer scienceMathematicsDiscrete mathematicsImage compressionArtificial intelligenceGeometryMathematical analysisPhysics
DOInot available

Abstract

fetched live from OpenAlex

We consider the data compression using antidictionaries and give algorithms for faster compression and decompression. While the original method of Crochemore et al. uses finite transducers with e-moves, we (de)compress using e-free transducers. This is provably faster, assuming data non-negligibly compressible, but we have to consider the overhead due to building the new ma-chines. In general, they can be quadratic in size compared to the ones allowing e-moves; we prove this bound optimal as it is reached for de Bruijn words. However, in practice, the size of the e-free machines turns out to be close to the size of the ones allowing e-moves and therefore we can achieve significantly faster (de)compression. We show our results for the files in Calgary corpus.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.008
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.007
Threshold uncertainty score0.024

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0010.008
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0020.003
Science and technology studies0.0010.002
Scholarly communication0.0020.006
Open science0.0020.004
Research integrity0.0020.002
Insufficient payload (model declined to judge)0.0070.003

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.027
GPT teacher head0.253
Teacher spread0.226 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations1
Published2004
Admission routes2
Has abstractyes

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