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Record W7135553930

Dictionary methods as second phase of BWT

2007· dissertation· sk· W7135553930 on OpenAlexaboutno aff
Stanislav Kovalčin

Bibliographic record

VenueDigital Repository (National Repository of Grey Literature) · 2007
Typedissertation
Languagesk
FieldComputer Science
TopicAlgorithms and Data Compression
Canadian institutionsnot available
Fundersnot available
KeywordsLossless compressionHuffman codingData compressionEncoding (memory)Compression (physics)Phase (matter)XML
DOInot available

Abstract

fetched live from OpenAlex

Burrows-Wheeler transform is one of the most favorite lossless data compression algorithm. Second phase of Burrows-Wheeler transform consists of combination of Move-tofront, Run-length encoding algorithm and used to be written by Huffman or arithmetic encoding. Dictionary methods are used by means of LZ family algorithm in another lossless data compression algorithm group. This master thesis is experimentally testing suitability of integration selected dictionary methods (LZC, LZSS) in second phase of Burrows-Wheeler transform, not only over alphabet of symbols and words, but also over alphabet of syllables. This suitability is tested likewise on large XML files. It is appropriate to propose modification of Burrows-Wheeler second phase's algorithms for large alphabets. Comparation of compression ratios not only over large XML files, but also over Calgary corpus with others programs using Burrows-Wheeler transform is presented.

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 distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.001
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Scholarly communication
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.587
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.001
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.001
Bibliometrics0.0010.001
Science and technology studies0.0010.000
Scholarly communication0.0020.005
Open science0.0020.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0000.000

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 head0.015
GPT teacher head0.352
Teacher spread0.336 · 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 teacher head, not a consensus.

Study designBench or experimental
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

Citations0
Published2007
Admission routes1
Has abstractyes

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