{"id":"https://openalex.org/W1507547546","doi":"https://doi.org/10.1007/11891321_4","title":"Data Sparsity Issues in the Collaborative Filtering Framework","display_name":"Data Sparsity Issues in the Collaborative Filtering Framework","publication_year":2006,"publication_date":"2006-01-01","ids":{"openalex":"https://openalex.org/W1507547546","doi":"https://doi.org/10.1007/11891321_4","mag":"1507547546"},"language":"en","primary_location":{"id":"doi:10.1007/11891321_4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/11891321_4","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"},"type":"book-chapter","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/A5074973926","display_name":"Miha Gr\u0107ar","orcid":null},"institutions":[{"id":"https://openalex.org/I3006985408","display_name":"Jo\u017eef Stefan Institute","ror":"https://ror.org/05060sz93","country_code":"SI","type":"facility","lineage":["https://openalex.org/I3006985408"]}],"countries":["SI"],"is_corresponding":true,"raw_author_name":"Miha Gr\u010dar","raw_affiliation_strings":["Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia"],"affiliations":[{"raw_affiliation_string":"Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia","institution_ids":["https://openalex.org/I3006985408"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5063095022","display_name":"Dunja Mladeni\u0107","orcid":"https://orcid.org/0000-0002-0360-6505"},"institutions":[{"id":"https://openalex.org/I3006985408","display_name":"Jo\u017eef Stefan Institute","ror":"https://ror.org/05060sz93","country_code":"SI","type":"facility","lineage":["https://openalex.org/I3006985408"]}],"countries":["SI"],"is_corresponding":false,"raw_author_name":"Dunja Mladeni\u010d","raw_affiliation_strings":["Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia"],"affiliations":[{"raw_affiliation_string":"Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia","institution_ids":["https://openalex.org/I3006985408"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5019788602","display_name":"Bla\u017e Fortuna","orcid":"https://orcid.org/0000-0002-8585-9388"},"institutions":[{"id":"https://openalex.org/I3006985408","display_name":"Jo\u017eef Stefan Institute","ror":"https://ror.org/05060sz93","country_code":"SI","type":"facility","lineage":["https://openalex.org/I3006985408"]}],"countries":["SI"],"is_corresponding":false,"raw_author_name":"Bla\u017e Fortuna","raw_affiliation_strings":["Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia"],"affiliations":[{"raw_affiliation_string":"Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia","institution_ids":["https://openalex.org/I3006985408"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5043874320","display_name":"Marko Grobelnik","orcid":"https://orcid.org/0000-0001-7373-5591"},"institutions":[{"id":"https://openalex.org/I3006985408","display_name":"Jo\u017eef Stefan Institute","ror":"https://ror.org/05060sz93","country_code":"SI","type":"facility","lineage":["https://openalex.org/I3006985408"]}],"countries":["SI"],"is_corresponding":false,"raw_author_name":"Marko Grobelnik","raw_affiliation_strings":["Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia"],"affiliations":[{"raw_affiliation_string":"Jo\u017eef Stefan Institute, Jamova 39, SI-1000, Ljubljana, Slovenia","institution_ids":["https://openalex.org/I3006985408"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":4,"corresponding_author_ids":["https://openalex.org/A5074973926"],"corresponding_institution_ids":["https://openalex.org/I3006985408"],"apc_list":{"value":5000,"currency":"EUR","value_usd":5392},"apc_paid":null,"fwci":3.6527,"has_fulltext":false,"cited_by_count":119,"citation_normalized_percentile":{"value":0.94048673,"is_in_top_1_percent":false,"is_in_top_10_percent":true},"cited_by_percentile_year":{"min":95,"max":99},"biblio":{"volume":null,"issue":null,"first_page":"58","last_page":"76"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10203","display_name":"Recommender Systems and Techniques","score":0.9998999834060669,"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":0.9998999834060669,"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/T11478","display_name":"Caching and Content Delivery","score":0.9794999957084656,"subfield":{"id":"https://openalex.org/subfields/1705","display_name":"Computer Networks and Communications"},"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/T12761","display_name":"Data Stream Mining Techniques","score":0.970300018787384,"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/collaborative-filtering","display_name":"Collaborative filtering","score":0.8786510229110718},{"id":"https://openalex.org/keywords/computer-science","display_name":"Computer science","score":0.8407598733901978},{"id":"https://openalex.org/keywords/support-vector-machine","display_name":"Support vector machine","score":0.7032544016838074},{"id":"https://openalex.org/keywords/k-nearest-neighbors-algorithm","display_name":"k-nearest neighbors algorithm","score":0.6505687236785889},{"id":"https://openalex.org/keywords/filter","display_name":"Filter (signal processing)","score":0.5656827688217163},{"id":"https://openalex.org/keywords/data-mining","display_name":"Data mining","score":0.5557370781898499},{"id":"https://openalex.org/keywords/personalization","display_name":"Personalization","score":0.5295307040214539},{"id":"https://openalex.org/keywords/machine-learning","display_name":"Machine learning","score":0.5006105899810791},{"id":"https://openalex.org/keywords/recommender-system","display_name":"Recommender system","score":0.4854877293109894},{"id":"https://openalex.org/keywords/artificial-intelligence","display_name":"Artificial intelligence","score":0.43085581064224243},{"id":"https://openalex.org/keywords/world-wide-web","display_name":"World Wide Web","score":0.07191017270088196}],"concepts":[{"id":"https://openalex.org/C21569690","wikidata":"https://www.wikidata.org/wiki/Q94702","display_name":"Collaborative filtering","level":3,"score":0.8786510229110718},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.8407598733901978},{"id":"https://openalex.org/C12267149","wikidata":"https://www.wikidata.org/wiki/Q282453","display_name":"Support vector machine","level":2,"score":0.7032544016838074},{"id":"https://openalex.org/C113238511","wikidata":"https://www.wikidata.org/wiki/Q1071612","display_name":"k-nearest neighbors algorithm","level":2,"score":0.6505687236785889},{"id":"https://openalex.org/C106131492","wikidata":"https://www.wikidata.org/wiki/Q3072260","display_name":"Filter (signal processing)","level":2,"score":0.5656827688217163},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.5557370781898499},{"id":"https://openalex.org/C183003079","wikidata":"https://www.wikidata.org/wiki/Q1000371","display_name":"Personalization","level":2,"score":0.5295307040214539},{"id":"https://openalex.org/C119857082","wikidata":"https://www.wikidata.org/wiki/Q2539","display_name":"Machine learning","level":1,"score":0.5006105899810791},{"id":"https://openalex.org/C557471498","wikidata":"https://www.wikidata.org/wiki/Q554950","display_name":"Recommender system","level":2,"score":0.4854877293109894},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.43085581064224243},{"id":"https://openalex.org/C136764020","wikidata":"https://www.wikidata.org/wiki/Q466","display_name":"World Wide Web","level":1,"score":0.07191017270088196},{"id":"https://openalex.org/C31972630","wikidata":"https://www.wikidata.org/wiki/Q844240","display_name":"Computer vision","level":1,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1007/11891321_4","is_oa":false,"landing_page_url":"https://doi.org/10.1007/11891321_4","pdf_url":null,"source":{"id":"https://openalex.org/S106296714","display_name":"Lecture notes in computer science","issn_l":"0302-9743","issn":["0302-9743","1611-3349"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310319900","host_organization_name":"Springer Science+Business Media","host_organization_lineage":["https://openalex.org/P4310319900","https://openalex.org/P4310319965"],"host_organization_lineage_names":["Springer Science+Business Media","Springer Nature"],"type":"book series"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Lecture Notes in Computer Science","raw_type":"book-chapter"}],"best_oa_location":null,"sustainable_development_goals":[{"id":"https://metadata.un.org/sdg/9","display_name":"Industry, innovation and infrastructure","score":0.6200000047683716}],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":24,"referenced_works":["https://openalex.org/W178169250","https://openalex.org/W1508584523","https://openalex.org/W1583837637","https://openalex.org/W1612003148","https://openalex.org/W1673941785","https://openalex.org/W1864566053","https://openalex.org/W1971040550","https://openalex.org/W1973812756","https://openalex.org/W1999047234","https://openalex.org/W2028138297","https://openalex.org/W2042281163","https://openalex.org/W2049455633","https://openalex.org/W2068159075","https://openalex.org/W2074680184","https://openalex.org/W2078730605","https://openalex.org/W2110325612","https://openalex.org/W2113858518","https://openalex.org/W2117354486","https://openalex.org/W2147152072","https://openalex.org/W2153635508","https://openalex.org/W2155106456","https://openalex.org/W2482173276","https://openalex.org/W2913318000","https://openalex.org/W4233135949"],"related_works":["https://openalex.org/W1484355083","https://openalex.org/W2772628444","https://openalex.org/W4220714703","https://openalex.org/W2735929803","https://openalex.org/W2170391450","https://openalex.org/W2098758514","https://openalex.org/W3008845055","https://openalex.org/W4376854386","https://openalex.org/W1966742602","https://openalex.org/W2508671622"],"abstract_inverted_index":null,"counts_by_year":[{"year":2025,"cited_by_count":2},{"year":2024,"cited_by_count":8},{"year":2023,"cited_by_count":5},{"year":2022,"cited_by_count":7},{"year":2021,"cited_by_count":12},{"year":2020,"cited_by_count":9},{"year":2019,"cited_by_count":12},{"year":2018,"cited_by_count":11},{"year":2017,"cited_by_count":8},{"year":2016,"cited_by_count":11},{"year":2015,"cited_by_count":3},{"year":2014,"cited_by_count":4},{"year":2013,"cited_by_count":7},{"year":2012,"cited_by_count":6}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}