{"id":"https://openalex.org/W2114758146","doi":"https://doi.org/10.1145/1454008.1454064","title":"Leveraging aggregate ratings for improving predictive performance of recommender systems","display_name":"Leveraging aggregate ratings for improving predictive performance of recommender systems","publication_year":2008,"publication_date":"2008-10-23","ids":{"openalex":"https://openalex.org/W2114758146","doi":"https://doi.org/10.1145/1454008.1454064","mag":"2114758146"},"language":"en","primary_location":{"id":"doi:10.1145/1454008.1454064","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1454008.1454064","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2008 ACM conference on Recommender systems","raw_type":"proceedings-article"},"type":"conference-paper","indexed_in":["crossref"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5002380733","display_name":"Akhmed Umyarov","orcid":null},"institutions":[{"id":"https://openalex.org/I57206974","display_name":"New York University","ror":"https://ror.org/0190ak572","country_code":"US","type":"education","lineage":["https://openalex.org/I57206974"]}],"countries":["US"],"is_corresponding":true,"raw_author_name":"Akhmed Umyarov","raw_affiliation_strings":["New York University, New York, NY, USA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"New York University, New York, NY, USA","institution_ids":["https://openalex.org/I57206974"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5002380733"],"corresponding_institution_ids":["https://openalex.org/I57206974"],"apc_list":null,"apc_paid":null,"fwci":0.5072,"has_fulltext":false,"cited_by_count":2,"citation_normalized_percentile":{"value":0.61484937,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":"327","last_page":"330"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9990000128746033,"subfield":{"id":"https://openalex.org/subfields/1710","display_name":"Information Systems"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12101","display_name":"Advanced Bandit Algorithms Research","score":0.9975000023841858,"subfield":{"id":"https://openalex.org/subfields/1803","display_name":"Management Science and Operations Research"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T12761","display_name":"Data Stream Mining Techniques","score":0.9889000058174133,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.867498517036438},{"id":"https://openalex.org/keywords/aggregate","display_name":"Aggregate (composite)","score":0.7740090489387512},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.7734583616256714},{"id":"https://openalex.org/keywords/key","display_name":"Key (lock)","score":0.5432121157646179},{"id":"https://openalex.org/keywords/information-retrieval","display_name":"Information retrieval","score":0.37273597717285156},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.36252763867378235},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.3400929570198059},{"id":"https://openalex.org/keywords/computer-security","display_name":"Computer security","score":0.06647932529449463}],"concepts":[{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.867498517036438},{"id":"https://openalex.org/C4679612","wikidata":"https://www.wikidata.org/wiki/Q866298","display_name":"Aggregate (composite)","level":2,"score":0.7740090489387512},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.7734583616256714},{"id":"https://openalex.org/C26517878","wikidata":"https://www.wikidata.org/wiki/Q228039","display_name":"Key (lock)","level":2,"score":0.5432121157646179},{"id":"https://openalex.org/C23123220","wikidata":"https://www.wikidata.org/wiki/Q816826","display_name":"Information retrieval","level":1,"score":0.37273597717285156},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.36252763867378235},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3400929570198059},{"id":"https://openalex.org/C38652104","wikidata":"https://www.wikidata.org/wiki/Q3510521","display_name":"Computer security","level":1,"score":0.06647932529449463},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.0},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1145/1454008.1454064","is_oa":false,"landing_page_url":"https://doi.org/10.1145/1454008.1454064","pdf_url":null,"source":null,"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Proceedings of the 2008 ACM conference on Recommender systems","raw_type":"proceedings-article"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/4","display_name":"Quality Education","score":0.5}],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":9,"referenced_works":["https://openalex.org/W2042281163","https://openalex.org/W2114758146","https://openalex.org/W2121323385","https://openalex.org/W2135624048","https://openalex.org/W2171960770","https://openalex.org/W2177923071","https://openalex.org/W2324392187","https://openalex.org/W2341535507","https://openalex.org/W3125262363"],"related_works":["https://openalex.org/W4390273403","https://openalex.org/W4386781444","https://openalex.org/W2150182025","https://openalex.org/W3092950680","https://openalex.org/W3197542405","https://openalex.org/W2056712470","https://openalex.org/W3125580266","https://openalex.org/W4317039510","https://openalex.org/W4238861846","https://openalex.org/W790944756"],"abstract_inverted_index":{"One":[0],"of":[1,11,14,22,30,41,44,51,56,67,79],"the":[2,23],"key":[3],"problems":[4],"in":[5,20],"recommender":[6],"systems":[7],"is":[8],"accurate":[9],"estimation":[10],"unknown":[12],"ratings":[13,26,46,53,80],"individual":[15,18,45],"items":[16,31,57],"for":[17,54,81],"users":[19],"terms":[21],"previously":[24],"specified":[25,64,76],"and":[27,32,58],"other":[28],"characteristics":[29],"users.":[33],"In":[34],"this":[35],"thesis,":[36],"we":[37],"investigate":[38],"a":[39],"way":[40],"improving":[42],"estimations":[43],"using":[47],"externally":[48,63,75],"provided":[49,70],"properties":[50],"aggregate":[52],"groups":[55],"users,":[59],"such":[60],"as":[61],"an":[62],"average":[65],"rating":[66],"action":[68],"movies":[69],"by":[71],"graduate":[72],"students":[73],"or":[74],"standard":[77],"deviation":[78],"comedy":[82],"movies.":[83]},"counts_by_year":[],"updated_date":"2026-07-29T14:22:42.915294","created_date":"2025-10-10T00:00:00"}
