System Summary and Timing Organization Name: Information Technology Institute, Singapore List of Run ID's: itidp1, itidp2 Construction of Indices, Knowledge Bases, and other Data Structures Methods Used to build Data Structures - Length (in words) of the stopword list: 429 - Controlled Vocabulary? : 0 - Stemming Algorithm: Porter's - Term Weighting: idf - Phrase Discovery? : No - Syntactic Parsing? : No - Word Sense Disambiguation? : No - Heuristic Associations (including short definition)? : No - Spelling Checking (with manual correction)? : No - Spelling Correction? : No - Proper Noun Identification Algorithm? : No - Tokenizer? : No - Manually-Indexed Terms? : No - Other Techniques for building Data Structures: No Statistics on Data Structures built from TREC Text - Inverted index - Run ID : itidp1, itidp2 - Total Storage (in MB): 900 (only rel docs and test data) - Total Computer Time to Build (in hours): 100 - Automatic Process? (If not, number of manual hours): yes - Use of Term Positions? : no - Only Single Terms Used? : yes - Clusters - N-grams, Suffix arrays, Signature Files - Knowledge Bases - Use of Manual Labor - Special Routing Structures - Other Data Structures built from TREC text Query construction Automatically Built Queries (Routing) - Topic Fields Used: Used training documents only - Average Computer Time to Build Query (in cpu seconds): 1300 - Method used in Query Construction - Terms Selected From - Topics: no - All Training Documents: yes - Term Weighting with Weights Based on terms in - Topics: no - All Training Documents: yes Searching Search Times - Run ID : itidp1, itidp2 - Computer Time to Search (Average per Query, in CPU seconds): 300 Machine Searching Methods - Vector Space Model? : yes - Boolean Matching? : yes Factors in Ranking - Term Frequency? : yes - Inverse Document Frequency? : yes - Other Term Weights? : yes - Information Theoretic Weights? : yes - Document Length? : yes Machine Information - Machine Type for TREC Experiment: Sun SPARC 10 - Was the Machine Dedicated or Shared: Shared - Amount of Hard Disk Storage (in MB): 9000 - Amount of RAM (in MB): 80 - Clock Rate of CPU (in MHz): 55