{"id":"https://openalex.org/W2161385689","doi":null,"title":"Geometric Algorithms for Trajectory Analysis","display_name":"Geometric Algorithms for Trajectory Analysis","publication_year":2015,"publication_date":"2015-06-29","ids":{"openalex":"https://openalex.org/W2161385689","mag":"2161385689"},"language":"en","primary_location":{"id":"pmh:oai:dspace.library.uu.nl:1874/313870","doi":null,"is_oa":true,"landing_page_url":"https://dspace.library.uu.nl/handle/1874/313870","pdf_url":null,"source":{"id":"https://openalex.org/S4306401649","display_name":"Utrecht University Repository (Utrecht University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I193662353","host_organization_name":"Utrecht University","host_organization_lineage":["https://openalex.org/I193662353"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Dissertation"},"volume":null,"type":"dissertation","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://dspace.library.uu.nl/handle/1874/313870","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5032979919","display_name":"Frank Staals","orcid":"https://orcid.org/0009-0004-8522-1351","observed_orcids":["https://orcid.org/0009-0004-8522-1351"]},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"Frank Staals","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":["https://openalex.org/A5032979919"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":null,"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11106","display_name":"Data Management and Algorithms","score":0.9994999766349792,"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/T11106","display_name":"Data Management and Algorithms","score":0.9994999766349792,"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/T10996","display_name":"Computational Geometry and Mesh Generation","score":0.00039999998989515007,"subfield":{"id":"https://openalex.org/subfields/1704","display_name":"Computer Graphics and Computer-Aided Design"},"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/T12205","display_name":"Time Series Analysis and Forecasting","score":0.0,"subfield":{"id":"https://openalex.org/subfields/1711","display_name":"Signal Processing"},"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/trajectory-analysis","display_name":"trajectory analysis","score":0.9459999799728394},{"id":"https://openalex.org/keywords/trajectory-segmentation","display_name":"trajectory segmentation","score":0.7829999923706055},{"id":"https://openalex.org/keywords/hotspot-detection","display_name":"hotspot detection","score":0.8939999938011169},{"id":"https://openalex.org/keywords/geometric-algorithms","display_name":"geometric algorithms","score":0.6610000133514404},{"id":"https://openalex.org/keywords/gps-tracking-data","display_name":"GPS tracking data","score":0.45899999141693115},{"id":"https://openalex.org/keywords/computational-geometry","display_name":"computational geometry","score":0.46399998664855957}],"concepts":[{"id":"https://openalex.org/C13662910","wikidata":"https://www.wikidata.org/wiki/Q193139","display_name":"Trajectory","level":2,"score":0.8073127865791321},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6277860403060913},{"id":"https://openalex.org/C2780451532","wikidata":"https://www.wikidata.org/wiki/Q759676","display_name":"Task (project management)","level":2,"score":0.5786044597625732},{"id":"https://openalex.org/C177264268","wikidata":"https://www.wikidata.org/wiki/Q1514741","display_name":"Set (abstract data type)","level":2,"score":0.5619938373565674},{"id":"https://openalex.org/C2834757","wikidata":"https://www.wikidata.org/wiki/Q4925424","display_name":"Monotone polygon","level":2,"score":0.5538017749786377},{"id":"https://openalex.org/C11413529","wikidata":"https://www.wikidata.org/wiki/Q8366","display_name":"Algorithm","level":1,"score":0.5510872602462769},{"id":"https://openalex.org/C60229501","wikidata":"https://www.wikidata.org/wiki/Q18822","display_name":"Global Positioning System","level":2,"score":0.49767640233039856},{"id":"https://openalex.org/C2781311116","wikidata":"https://www.wikidata.org/wiki/Q83306","display_name":"Group (periodic table)","level":2,"score":0.4970104992389679},{"id":"https://openalex.org/C2775936607","wikidata":"https://www.wikidata.org/wiki/Q466845","display_name":"Tracking (education)","level":2,"score":0.4672914147377014},{"id":"https://openalex.org/C89600930","wikidata":"https://www.wikidata.org/wiki/Q1423946","display_name":"Segmentation","level":2,"score":0.420526385307312},{"id":"https://openalex.org/C25343380","wikidata":"https://www.wikidata.org/wiki/Q277521","display_name":"Relation (database)","level":2,"score":0.4128567576408386},{"id":"https://openalex.org/C124101348","wikidata":"https://www.wikidata.org/wiki/Q172491","display_name":"Data mining","level":1,"score":0.29511165618896484},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2695557475090027},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.260001540184021},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.08217915892601013},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.07804638147354126},{"id":"https://openalex.org/C15744967","wikidata":"https://www.wikidata.org/wiki/Q9418","display_name":"Psychology","level":0,"score":0.0},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.0},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.0},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"score":0.0},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.0},{"id":"https://openalex.org/C201995342","wikidata":"https://www.wikidata.org/wiki/Q682496","display_name":"Systems engineering","level":1,"score":0.0},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0},{"id":"https://openalex.org/C76155785","wikidata":"https://www.wikidata.org/wiki/Q418","display_name":"Telecommunications","level":1,"score":0.0},{"id":"https://openalex.org/C19417346","wikidata":"https://www.wikidata.org/wiki/Q7922","display_name":"Pedagogy","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"pmh:oai:dspace.library.uu.nl:1874/313870","doi":null,"is_oa":true,"landing_page_url":"https://dspace.library.uu.nl/handle/1874/313870","pdf_url":null,"source":{"id":"https://openalex.org/S4306401649","display_name":"Utrecht University Repository (Utrecht University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I193662353","host_organization_name":"Utrecht University","host_organization_lineage":["https://openalex.org/I193662353"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Dissertation"},{"id":"pmh:uu:oai:dspace.library.uu.nl:1874/313870","doi":null,"is_oa":true,"landing_page_url":"https://dspace.library.uu.nl/handle/1874/313870","pdf_url":null,"source":{"id":"https://openalex.org/S4306401649","display_name":"Utrecht University Repository (Utrecht University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I193662353","host_organization_name":"Utrecht University","host_organization_lineage":["https://openalex.org/I193662353"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/doctoralthesis"},{"id":"mag:2161385689","doi":null,"is_oa":false,"landing_page_url":"https://dspace.library.uu.nl/bitstream/1874/313870/1/staals.pdf","pdf_url":null,"source":null,"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":{"id":"pmh:oai:dspace.library.uu.nl:1874/313870","doi":null,"is_oa":true,"landing_page_url":"https://dspace.library.uu.nl/handle/1874/313870","pdf_url":null,"source":{"id":"https://openalex.org/S4306401649","display_name":"Utrecht University Repository (Utrecht University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I193662353","host_organization_name":"Utrecht University","host_organization_lineage":["https://openalex.org/I193662353"],"host_organization_lineage_names":[],"type":"repository"},"license":"other-oa","license_id":"https://openalex.org/licenses/other-oa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Dissertation"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":111,"referenced_works":["https://openalex.org/W18056272","https://openalex.org/W47048980","https://openalex.org/W58109815","https://openalex.org/W116902681","https://openalex.org/W164930620","https://openalex.org/W168571963","https://openalex.org/W168617908","https://openalex.org/W243610207","https://openalex.org/W589337778","https://openalex.org/W1497991451","https://openalex.org/W1503030630","https://openalex.org/W1537829861","https://openalex.org/W1543485623","https://openalex.org/W1561671573","https://openalex.org/W1600584489","https://openalex.org/W1673310716","https://openalex.org/W1805473247","https://openalex.org/W1806289263","https://openalex.org/W1934562893","https://openalex.org/W1949832274","https://openalex.org/W1957237119","https://openalex.org/W1972709730","https://openalex.org/W1978815118","https://openalex.org/W1978939541","https://openalex.org/W1980092773","https://openalex.org/W1981398125","https://openalex.org/W1981918053","https://openalex.org/W1981934656","https://openalex.org/W1990223028","https://openalex.org/W1992419399","https://openalex.org/W1995040285","https://openalex.org/W2000525346","https://openalex.org/W2004350101","https://openalex.org/W2007159514","https://openalex.org/W2011968383","https://openalex.org/W2015280640","https://openalex.org/W2015378554","https://openalex.org/W2018804864","https://openalex.org/W2028747718","https://openalex.org/W2029149715","https://openalex.org/W2032738999","https://openalex.org/W2033371003","https://openalex.org/W2033626772","https://openalex.org/W2035566389","https://openalex.org/W2038142281","https://openalex.org/W2038474686","https://openalex.org/W2038699153","https://openalex.org/W2039810899","https://openalex.org/W2042959088","https://openalex.org/W2042968733","https://openalex.org/W2043522383","https://openalex.org/W2046774846","https://openalex.org/W2047216628","https://openalex.org/W2049215213","https://openalex.org/W2057435778","https://openalex.org/W2058510050","https://openalex.org/W2060346657","https://openalex.org/W2065303943","https://openalex.org/W2066574710","https://openalex.org/W2074104866","https://openalex.org/W2074153149","https://openalex.org/W2075608792","https://openalex.org/W2076158447","https://openalex.org/W2086952960","https://openalex.org/W2086961842","https://openalex.org/W2090702599","https://openalex.org/W2092052904","https://openalex.org/W2092605143","https://openalex.org/W2095875205","https://openalex.org/W2097004206","https://openalex.org/W2097357452","https://openalex.org/W2104434203","https://openalex.org/W2106413026","https://openalex.org/W2110134662","https://openalex.org/W2110707662","https://openalex.org/W2111526938","https://openalex.org/W2115344139","https://openalex.org/W2117895438","https://openalex.org/W2119339514","https://openalex.org/W2124299914","https://openalex.org/W2129247217","https://openalex.org/W2130260662","https://openalex.org/W2132026455","https://openalex.org/W2133123111","https://openalex.org/W2133184712","https://openalex.org/W2136807817","https://openalex.org/W2137120608","https://openalex.org/W2137865362","https://openalex.org/W2138199375","https://openalex.org/W2141136363","https://openalex.org/W2142561263","https://openalex.org/W2142947709","https://openalex.org/W2147880780","https://openalex.org/W2149906774","https://openalex.org/W2151616310","https://openalex.org/W2157734830","https://openalex.org/W2165169065","https://openalex.org/W2168694032","https://openalex.org/W2172137407","https://openalex.org/W2176384712","https://openalex.org/W2202869537","https://openalex.org/W2284029830","https://openalex.org/W2404213258","https://openalex.org/W2474280286","https://openalex.org/W2570995828","https://openalex.org/W2912202394","https://openalex.org/W2914680812","https://openalex.org/W3013843370","https://openalex.org/W3037925904","https://openalex.org/W3140579943","https://openalex.org/W4239283731"],"related_works":["https://openalex.org/W2062868042","https://openalex.org/W2295098250","https://openalex.org/W4413733980","https://openalex.org/W2065303943","https://openalex.org/W4313131444","https://openalex.org/W4232033280","https://openalex.org/W2284029830","https://openalex.org/W2055594738","https://openalex.org/W2876125642","https://openalex.org/W2104434203"],"abstract_inverted_index":{"Technology":[0],"such":[1,38],"as":[2],"the":[3,60,79,91,116,122,154,172],"Global":[4],"Positing":[5],"System":[6],"(GPS)":[7],"has":[8],"made":[9],"tracking":[10],"moving":[11],"entities":[12,104],"easy":[13],"and":[14,28,34,48,90,156,187],"cheap.":[15],"As":[16],"a":[17,21,64,67,71,82,97,108,127,139,142,145],"result":[18],"there":[19],"is":[20,96,185],"large":[22,83,128],"amount":[23,84],"of":[24,66,85,147],"trajectory":[25,46,68],"data":[26],"available,":[27],"an":[29],"increasing":[30],"demand":[31],"on":[32,70],"tools":[33],"techniques":[35],"to":[36,52,115,165,169],"analyze":[37,157],"data.":[39],"We":[40,161],"consider":[41],"several":[42],"analysis":[43,184],"tasks":[44],"for":[45,144],"data,":[47],"develop":[49],"efficient":[50,167],"algorithms":[51,168,190],"perform":[53,171],"them":[54],"automatically.":[55],"In":[56,113,176],"particular,":[57],"we":[58,119,152,179],"study":[59],"following":[61],"tasks:":[62],"\u2022Find":[63,74,87,138],"segmentation":[65],"based":[69],"non-monotone":[72],"criterion.":[73],"hotspots;":[75],"regions":[76],"in":[77,100],"which":[78,101],"entity":[80],"spent":[81],"time.":[86],"all":[88],"groups":[89,117,136],"grouping":[92],"structure.":[93],"A":[94],"group":[95,129],"movement":[98],"pattern":[99],"sufficiently":[102,109],"many":[103,177],"move":[105],"together":[106],"during":[107],"long":[110],"time":[111],"interval.":[112],"addition":[114],"themselves":[118],"also":[120,180],"find":[121],"relation":[123],"between":[124],"groups,":[125],"e.g.":[126],"came":[130],"into":[131],"existence":[132],"when":[133],"two":[134],"smaller":[135],"merged.":[137],"central":[140],"trajectory:":[141],"representative":[143],"set":[146],"trajectories.":[148],"For":[149],"each":[150],"task,":[151],"formalize":[153],"problem,":[155],"its":[158],"geometric":[159],"properties.":[160],"use":[162],"these":[163],"properties":[164],"obtain":[166],"automatically":[170],"task":[173],"at":[174],"hand.":[175],"cases,":[178],"show":[181],"that":[182,188],"our":[183,189],"tight,":[186],"are":[191],"optimal.":[192]},"counts_by_year":[{"year":2020,"cited_by_count":1}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2016-06-24T00:00:00"}