{"id":"https://openalex.org/W3134453073","doi":"https://doi.org/10.3390/en14051497","title":"A Study on the Characteristics of Academic Topics Related to Renewable Energy Using the Structural Topic Modeling and the Weak Signal Concept","display_name":"A Study on the Characteristics of Academic Topics Related to Renewable Energy Using the Structural Topic Modeling and the Weak Signal Concept","publication_year":2021,"publication_date":"2021-03-09","ids":{"openalex":"https://openalex.org/W3134453073","doi":"https://doi.org/10.3390/en14051497","mag":"3134453073"},"language":"en","primary_location":{"id":"doi:10.3390/en14051497","doi":"https://doi.org/10.3390/en14051497","is_oa":true,"landing_page_url":"https://doi.org/10.3390/en14051497","pdf_url":"https://www.mdpi.com/1996-1073/14/5/1497/pdf?version=1615344546","source":{"id":"https://openalex.org/S198098182","display_name":"Energies","issn_l":"1996-1073","issn":["1996-1073"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","norway-1","poland-140","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energies","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/1996-1073/14/5/1497/pdf?version=1615344546","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5000856390","display_name":"Chankook Park","orcid":"https://orcid.org/0000-0002-5433-9937","observed_orcids":["https://orcid.org/0000-0002-5433-9937"]},"institutions":[{"id":"https://openalex.org/I4210087425","display_name":"Korea Energy Economics Institute","ror":"https://ror.org/0113xme87","country_code":"KR","type":"facility","lineage":["https://openalex.org/I4210087425","https://openalex.org/I4210097958"]}],"countries":["KR"],"is_corresponding":true,"raw_author_name":"Chankook Park","raw_affiliation_strings":["Korea Energy Economics Institute (KEEI), 405-11, Jongga-ro, Jung-gu, Ulsan 44543, Korea"],"raw_orcid":"https://orcid.org/0000-0002-5433-9937","affiliations":[{"raw_affiliation_string":"Korea Energy Economics Institute (KEEI), 405-11, Jongga-ro, Jung-gu, Ulsan 44543, Korea","institution_ids":["https://openalex.org/I4210087425"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5100377715","display_name":"Minkyu Kim","orcid":"https://orcid.org/0009-0002-3007-9736","observed_orcids":["https://orcid.org/0009-0002-3007-9736"]},"institutions":[{"id":"https://openalex.org/I4210087425","display_name":"Korea Energy Economics Institute","ror":"https://ror.org/0113xme87","country_code":"KR","type":"facility","lineage":["https://openalex.org/I4210087425","https://openalex.org/I4210097958"]}],"countries":["KR"],"is_corresponding":true,"raw_author_name":"Minkyu Kim","raw_affiliation_strings":["Korea Energy Economics Institute (KEEI), 405-11, Jongga-ro, Jung-gu, Ulsan 44543, Korea"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Korea Energy Economics Institute (KEEI), 405-11, Jongga-ro, Jung-gu, Ulsan 44543, Korea","institution_ids":["https://openalex.org/I4210087425"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5000856390","https://openalex.org/A5100377715"],"corresponding_institution_ids":["https://openalex.org/I4210087425"],"apc_list":{"value":2000,"currency":"CHF","value_usd":2160},"apc_paid":{"value":2000,"currency":"CHF","value_usd":2160},"fwci":0.6836,"has_fulltext":true,"cited_by_count":12,"citation_normalized_percentile":{"value":0.71676416,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":98},"biblio":{"volume":"14","issue":"5","first_page":"1497","last_page":"1497"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10102","display_name":"scientometrics and bibliometrics research","score":0.23680000007152557,"subfield":{"id":"https://openalex.org/subfields/1804","display_name":"Statistics, Probability and Uncertainty"},"field":{"id":"https://openalex.org/fields/18","display_name":"Decision Sciences"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T10102","display_name":"scientometrics and bibliometrics research","score":0.23680000007152557,"subfield":{"id":"https://openalex.org/subfields/1804","display_name":"Statistics, Probability and Uncertainty"},"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/T14481","display_name":"Renewable Energy and Sustainability","score":0.19619999825954437,"subfield":{"id":"https://openalex.org/subfields/2105","display_name":"Renewable Energy, Sustainability and the Environment"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12271","display_name":"Renewable energy and sustainable power systems","score":0.09619999676942825,"subfield":{"id":"https://openalex.org/subfields/2105","display_name":"Renewable Energy, Sustainability and the Environment"},"field":{"id":"https://openalex.org/fields/21","display_name":"Energy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/structural-topic-modeling","display_name":"structural topic modeling","score":0.7630000114440918},{"id":"https://openalex.org/keywords/weak-signals","display_name":"weak signals","score":0.9710000157356262},{"id":"https://openalex.org/keywords/research-trends","display_name":"research trends","score":0.4690000116825104},{"id":"https://openalex.org/keywords/energy-storage-systems","display_name":"energy storage systems","score":0.6579999923706055},{"id":"https://openalex.org/keywords/hydrogen-energy-storage","display_name":"hydrogen energy storage","score":0.6809999942779541},{"id":"https://openalex.org/keywords/supercapacitors","display_name":"supercapacitors","score":0.9860000014305115},{"id":"https://openalex.org/keywords/compressed-air-energy-storage","display_name":"compressed air energy storage","score":1.0},{"id":"https://openalex.org/keywords/renewable-energy-integration","display_name":"renewable energy integration","score":0.8600000143051147},{"id":"https://openalex.org/keywords/renewable-energy-policy","display_name":"renewable energy policy","score":0.7919999957084656},{"id":"https://openalex.org/keywords/research-topic-evolution","display_name":"research topic evolution","score":0.4189999997615814}],"concepts":[{"id":"https://openalex.org/C188573790","wikidata":"https://www.wikidata.org/wiki/Q12705","display_name":"Renewable energy","level":2,"score":0.8970378637313843},{"id":"https://openalex.org/C134560507","wikidata":"https://www.wikidata.org/wiki/Q753291","display_name":"Environmental economics","level":1,"score":0.6080218553543091},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.502342939376831},{"id":"https://openalex.org/C49937458","wikidata":"https://www.wikidata.org/wiki/Q2599292","display_name":"Probabilistic logic","level":2,"score":0.4977770149707794},{"id":"https://openalex.org/C182306322","wikidata":"https://www.wikidata.org/wiki/Q1779371","display_name":"Order (exchange)","level":2,"score":0.4694846272468567},{"id":"https://openalex.org/C187691185","wikidata":"https://www.wikidata.org/wiki/Q2020720","display_name":"Grid","level":2,"score":0.439103901386261},{"id":"https://openalex.org/C186370098","wikidata":"https://www.wikidata.org/wiki/Q442787","display_name":"Energy (signal processing)","level":2,"score":0.43192580342292786},{"id":"https://openalex.org/C144133560","wikidata":"https://www.wikidata.org/wiki/Q4830453","display_name":"Business","level":0,"score":0.21577128767967224},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.18817386031150818},{"id":"https://openalex.org/C162324750","wikidata":"https://www.wikidata.org/wiki/Q8134","display_name":"Economics","level":0,"score":0.18141907453536987},{"id":"https://openalex.org/C119599485","wikidata":"https://www.wikidata.org/wiki/Q43035","display_name":"Electrical engineering","level":1,"score":0.16018056869506836},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.12771394848823547},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.10432842373847961},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.07122203707695007},{"id":"https://openalex.org/C2524010","wikidata":"https://www.wikidata.org/wiki/Q8087","display_name":"Geometry","level":1,"score":0.0},{"id":"https://openalex.org/C10138342","wikidata":"https://www.wikidata.org/wiki/Q43015","display_name":"Finance","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.3390/en14051497","doi":"https://doi.org/10.3390/en14051497","is_oa":true,"landing_page_url":"https://doi.org/10.3390/en14051497","pdf_url":"https://www.mdpi.com/1996-1073/14/5/1497/pdf?version=1615344546","source":{"id":"https://openalex.org/S198098182","display_name":"Energies","issn_l":"1996-1073","issn":["1996-1073"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","norway-1","poland-140","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energies","raw_type":"journal-article"},{"id":"pmh:oai:RePEc:gam:jeners:v:14:y:2021:i:5:p:1497-:d:513425","doi":null,"is_oa":false,"landing_page_url":"https://www.mdpi.com/1996-1073/14/5/1497/","pdf_url":null,"source":{"id":"https://openalex.org/S4306401271","display_name":"RePEc: Research Papers in Economics","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I77793887","host_organization_name":"Federal Reserve Bank of St. Louis","host_organization_lineage":["https://openalex.org/I77793887"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article"},{"id":"pmh:oai:doaj.org/article:d7a7249d30544e7c953a3f002059ced4","doi":null,"is_oa":true,"landing_page_url":"https://doaj.org/article/d7a7249d30544e7c953a3f002059ced4","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Energies, Vol 14, Iss 5, p 1497 (2021)","raw_type":"article"}],"best_oa_location":{"id":"doi:10.3390/en14051497","doi":"https://doi.org/10.3390/en14051497","is_oa":true,"landing_page_url":"https://doi.org/10.3390/en14051497","pdf_url":"https://www.mdpi.com/1996-1073/14/5/1497/pdf?version=1615344546","source":{"id":"https://openalex.org/S198098182","display_name":"Energies","issn_l":"1996-1073","issn":["1996-1073"],"is_oa":true,"is_in_doaj":true,"is_core":true,"listed_in":["anvur-class-a","anvur-scientific","cwts-core","doaj","norway-1","poland-140","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Energies","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Affordable and clean energy","id":"https://metadata.un.org/sdg/7","score":1.0},{"display_name":"Climate action","id":"https://metadata.un.org/sdg/13","score":0.821399986743927},{"display_name":"Industry, innovation and infrastructure","id":"https://metadata.un.org/sdg/9","score":0.428600013256073}],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W3134453073.pdf","grobid_xml":"https://content.openalex.org/works/W3134453073.grobid-xml"},"referenced_works_count":82,"referenced_works":["https://openalex.org/W171636962","https://openalex.org/W1880262756","https://openalex.org/W1964637598","https://openalex.org/W1965470801","https://openalex.org/W1966955114","https://openalex.org/W1973585741","https://openalex.org/W1978673506","https://openalex.org/W1994261539","https://openalex.org/W2009409004","https://openalex.org/W2020481431","https://openalex.org/W2022729906","https://openalex.org/W2028821901","https://openalex.org/W2029385742","https://openalex.org/W2035252867","https://openalex.org/W2036778492","https://openalex.org/W2039307945","https://openalex.org/W2047223952","https://openalex.org/W2055988432","https://openalex.org/W2056369127","https://openalex.org/W2058176840","https://openalex.org/W2059398827","https://openalex.org/W2068736489","https://openalex.org/W2070571946","https://openalex.org/W2076766243","https://openalex.org/W2085254503","https://openalex.org/W2086821066","https://openalex.org/W2088724053","https://openalex.org/W2094864959","https://openalex.org/W2113533029","https://openalex.org/W2123197697","https://openalex.org/W2135670467","https://openalex.org/W2144100511","https://openalex.org/W2151373442","https://openalex.org/W2178534933","https://openalex.org/W2223092947","https://openalex.org/W2232035265","https://openalex.org/W2236274921","https://openalex.org/W2306119308","https://openalex.org/W2327618756","https://openalex.org/W2346142423","https://openalex.org/W2461150895","https://openalex.org/W2489831020","https://openalex.org/W2490954318","https://openalex.org/W2558582135","https://openalex.org/W2620976369","https://openalex.org/W2730642019","https://openalex.org/W2736902235","https://openalex.org/W2760885844","https://openalex.org/W2775044157","https://openalex.org/W2780832420","https://openalex.org/W2792826432","https://openalex.org/W2793999592","https://openalex.org/W2794957125","https://openalex.org/W2902742738","https://openalex.org/W2905847250","https://openalex.org/W2906704699","https://openalex.org/W2921050791","https://openalex.org/W2924242825","https://openalex.org/W2933024154","https://openalex.org/W2943589076","https://openalex.org/W2945318531","https://openalex.org/W2947990139","https://openalex.org/W2951432148","https://openalex.org/W2953936648","https://openalex.org/W2962842434","https://openalex.org/W2963215104","https://openalex.org/W2967144110","https://openalex.org/W2981077025","https://openalex.org/W2991237542","https://openalex.org/W2996168669","https://openalex.org/W2998187343","https://openalex.org/W3010589407","https://openalex.org/W3015131711","https://openalex.org/W3015847884","https://openalex.org/W3019163642","https://openalex.org/W3036650545","https://openalex.org/W3040841565","https://openalex.org/W3046098464","https://openalex.org/W3048257460","https://openalex.org/W3109299057","https://openalex.org/W3116375014","https://openalex.org/W3138297888"],"related_works":["https://openalex.org/W3019163642","https://openalex.org/W4387428568","https://openalex.org/W3008717300","https://openalex.org/W6977836136","https://openalex.org/W4401101303","https://openalex.org/W7214093286","https://openalex.org/W3111300926","https://openalex.org/W7221292448","https://openalex.org/W4368366588","https://openalex.org/W4307901022"],"abstract_inverted_index":{"It":[0],"is":[1,18,150],"important":[2],"to":[3,15,25,36,38,52,154,159],"examine":[4,54],"in":[5,29,32,88,109],"detail":[6],"how":[7],"the":[8,30,39,55,70,73,76,98],"distribution":[9],"of":[10,41,58,72,78,127,147],"academic":[11,64],"research":[12],"topics":[13,22,61,74,133],"related":[14],"renewable":[16,42,59,95,139,155],"energy":[17,60,96,111,121,140,156],"structured":[19],"and":[20,68,118,143],"which":[21],"are":[23,101],"likely":[24],"receive":[26],"new":[27],"attention":[28],"future":[31,79],"order":[33],"for":[34,92],"scientists":[35],"contribute":[37],"development":[40],"energy.":[43],"This":[44],"study":[45,149],"uses":[46],"an":[47],"advanced":[48],"probabilistic":[49],"topic":[50],"modeling":[51],"statistically":[53],"temporal":[56],"changes":[57],"by":[62],"using":[63],"abstracts":[65],"from":[66,75],"2010\u20132019":[67],"explores":[69],"properties":[71],"perspective":[77],"signs":[80],"such":[81,114,137],"as":[82,115,138],"weak":[83,106],"signals.":[84],"As":[85],"a":[86,124],"result,":[87],"strong":[89],"signals,":[90,107,131],"methods":[91],"optimally":[93],"integrating":[94],"into":[97],"power":[99],"grid":[100],"paid":[102],"great":[103],"attention.":[104],"In":[105,129],"interest":[108],"large-capacity":[110],"storage":[112,122],"systems":[113],"hydrogen,":[116],"supercapacitors,":[117],"compressed":[119],"air":[120],"showed":[123],"high":[125],"rate":[126],"increase.":[128],"not-strong-but-well-known":[130],"comprehensive":[132],"have":[134],"been":[135],"included,":[136],"potential,":[141],"barriers,":[142],"policies.":[144],"The":[145],"approach":[146],"this":[148],"applicable":[151],"not":[152],"only":[153],"but":[157],"also":[158],"other":[160],"subjects.":[161]},"counts_by_year":[{"year":2026,"cited_by_count":3},{"year":2025,"cited_by_count":3},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":3},{"year":2021,"cited_by_count":1},{"year":2018,"cited_by_count":1}],"updated_date":"2026-11-04T10:54:05.112534","created_date":"2021-03-15T00:00:00"}