{"id":"https://openalex.org/W2006464969","doi":"https://doi.org/10.1021/jp112171j","title":"Ultraviolet Photofragmentation Spectroscopy of Alkaline Earth Dication Complexes with Pyridine and 4-Picoline (4-Methyl pyridine)","display_name":"Ultraviolet Photofragmentation Spectroscopy of Alkaline Earth Dication Complexes with Pyridine and 4-Picoline (4-Methyl pyridine)","publication_year":2011,"publication_date":"2011-05-13","ids":{"openalex":"https://openalex.org/W2006464969","doi":"https://doi.org/10.1021/jp112171j","mag":"2006464969","pmid":"https://pubmed.ncbi.nlm.nih.gov/21568303"},"language":"en","primary_location":{"id":"doi:10.1021/jp112171j","doi":"https://doi.org/10.1021/jp112171j","is_oa":false,"landing_page_url":"https://doi.org/10.1021/jp112171j","pdf_url":null,"source":{"id":"https://openalex.org/S146709414","display_name":"The Journal of Physical Chemistry A","issn_l":"1089-5639","issn":["1089-5639","1520-5215"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320006","host_organization_name":"American Chemical Society","host_organization_lineage":["https://openalex.org/P4310320006"],"host_organization_lineage_names":["American Chemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of Physical Chemistry A","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://figshare.com/articles/journal_contribution/Ultraviolet_Photofragmentation_Spectroscopy_of_Alkaline_Earth_Dication_Complexes_with_Pyridine_and_4-Picoline_4-Methyl_pyridine_/23358806","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5065437143","display_name":"Hamish I. Stewart","orcid":"https://orcid.org/0009-0000-1510-4353","observed_orcids":["https://orcid.org/0009-0000-1510-4353"]},"institutions":[{"id":"https://openalex.org/I142263535","display_name":"University of Nottingham","ror":"https://ror.org/01ee9ar58","country_code":"GB","type":"education","lineage":["https://openalex.org/I142263535"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Hamish Stewart","raw_affiliation_strings":["Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom","institution_ids":["https://openalex.org/I142263535"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101977801","display_name":"Guohua Wu","orcid":"https://orcid.org/0000-0002-7886-8841","observed_orcids":["https://orcid.org/0000-0002-7886-8841"]},"institutions":[{"id":"https://openalex.org/I142263535","display_name":"University of Nottingham","ror":"https://ror.org/01ee9ar58","country_code":"GB","type":"education","lineage":["https://openalex.org/I142263535"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Guohua Wu","raw_affiliation_strings":["Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom","institution_ids":["https://openalex.org/I142263535"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5082883663","display_name":"Lifu Ma","orcid":"https://orcid.org/0000-0003-1734-0784","observed_orcids":["https://orcid.org/0000-0003-1734-0784"]},"institutions":[{"id":"https://openalex.org/I142263535","display_name":"University of Nottingham","ror":"https://ror.org/01ee9ar58","country_code":"GB","type":"education","lineage":["https://openalex.org/I142263535"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Lifu Ma","raw_affiliation_strings":["Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom","institution_ids":["https://openalex.org/I142263535"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5081364321","display_name":"Michael Barclay","orcid":"https://orcid.org/0000-0003-3476-1767","observed_orcids":["https://orcid.org/0000-0003-3476-1767"]},"institutions":[{"id":"https://openalex.org/I162608824","display_name":"University of Sussex","ror":"https://ror.org/00ayhx656","country_code":"GB","type":"education","lineage":["https://openalex.org/I162608824"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Michael Barclay","raw_affiliation_strings":["Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom","institution_ids":["https://openalex.org/I162608824"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5066655857","display_name":"Andreia Dias Vieira","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I162608824","display_name":"University of Sussex","ror":"https://ror.org/00ayhx656","country_code":"GB","type":"education","lineage":["https://openalex.org/I162608824"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Andreia Dias Vieira","raw_affiliation_strings":["Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom","institution_ids":["https://openalex.org/I162608824"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5065257084","display_name":"Andrew W. King","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I162608824","display_name":"University of Sussex","ror":"https://ror.org/00ayhx656","country_code":"GB","type":"education","lineage":["https://openalex.org/I162608824"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Andrew King","raw_affiliation_strings":["Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom","institution_ids":["https://openalex.org/I162608824"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5017889619","display_name":"Hazel Cox","orcid":"https://orcid.org/0000-0001-5321-5417","observed_orcids":["https://orcid.org/0000-0001-5321-5417"]},"institutions":[{"id":"https://openalex.org/I162608824","display_name":"University of Sussex","ror":"https://ror.org/00ayhx656","country_code":"GB","type":"education","lineage":["https://openalex.org/I162608824"]}],"countries":["GB"],"is_corresponding":true,"raw_author_name":"Hazel Cox","raw_affiliation_strings":["Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Chemistry and Biochemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom","institution_ids":["https://openalex.org/I162608824"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5028528461","display_name":"Anthony J. Stace","orcid":"https://orcid.org/0000-0001-5948-3623","observed_orcids":["https://orcid.org/0000-0001-5948-3623"]},"institutions":[{"id":"https://openalex.org/I142263535","display_name":"University of Nottingham","ror":"https://ror.org/01ee9ar58","country_code":"GB","type":"education","lineage":["https://openalex.org/I142263535"]}],"countries":["GB"],"is_corresponding":true,"raw_author_name":"Anthony J. Stace","raw_affiliation_strings":["Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Department of Physical and Theoretical Chemistry, School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, United Kindom","institution_ids":["https://openalex.org/I142263535"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":["https://openalex.org/A5017889619","https://openalex.org/A5028528461"],"corresponding_institution_ids":["https://openalex.org/I142263535","https://openalex.org/I162608824"],"apc_list":null,"apc_paid":null,"fwci":0.469,"has_fulltext":false,"cited_by_count":5,"citation_normalized_percentile":{"value":0.59161544,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":95},"biblio":{"volume":"115","issue":"25","first_page":"6948","last_page":"6960"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10002","display_name":"Advanced Chemical Physics Studies","score":0.4343000054359436,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10002","display_name":"Advanced Chemical Physics Studies","score":0.4343000054359436,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11177","display_name":"Spectroscopy and Quantum Chemical Studies","score":0.2856000065803528,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10523","display_name":"Atomic and Molecular Physics","score":0.14499999582767487,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/pyridine-complexes","display_name":"pyridine complexes","score":0.828000009059906},{"id":"https://openalex.org/keywords/4-picoline","display_name":"4-picoline","score":0.7929999828338623},{"id":"https://openalex.org/keywords/electronic-transitions","display_name":"electronic transitions","score":0.5479999780654907},{"id":"https://openalex.org/keywords/pi-pi-transition","display_name":"\u03c0\u2192\u03c0* transitions","score":0.7929999828338623},{"id":"https://openalex.org/keywords/metal-ligand-bonding","display_name":"metal-ligand bonding","score":0.6389999985694885},{"id":"https://openalex.org/keywords/time-dependent-density-functional-theory","display_name":"time-dependent density functional theory","score":0.6290000081062317},{"id":"https://openalex.org/keywords/ion-trap","display_name":"ion trap","score":0.492000013589859}],"concepts":[{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.8981916904449463},{"id":"https://openalex.org/C66009135","wikidata":"https://www.wikidata.org/wiki/Q5272330","display_name":"Dication","level":3,"score":0.7932612895965576},{"id":"https://openalex.org/C2779485729","wikidata":"https://www.wikidata.org/wiki/Q210385","display_name":"Pyridine","level":2,"score":0.7582552433013916},{"id":"https://openalex.org/C20853536","wikidata":"https://www.wikidata.org/wiki/Q4120992","display_name":"Time-dependent density functional theory","level":3,"score":0.6230138540267944},{"id":"https://openalex.org/C2776272617","wikidata":"https://www.wikidata.org/wiki/Q2092388","display_name":"Picoline","level":3,"score":0.5859959125518799},{"id":"https://openalex.org/C32891209","wikidata":"https://www.wikidata.org/wiki/Q483666","display_name":"Spectroscopy","level":2,"score":0.5155825018882751},{"id":"https://openalex.org/C66075629","wikidata":"https://www.wikidata.org/wiki/Q898426","display_name":"Ultraviolet visible spectroscopy","level":2,"score":0.4740709364414215},{"id":"https://openalex.org/C145148216","wikidata":"https://www.wikidata.org/wiki/Q36496","display_name":"Ion","level":2,"score":0.46824824810028076},{"id":"https://openalex.org/C119824511","wikidata":"https://www.wikidata.org/wiki/Q13553575","display_name":"Absorption spectroscopy","level":2,"score":0.4668090343475342},{"id":"https://openalex.org/C4839761","wikidata":"https://www.wikidata.org/wiki/Q212111","display_name":"Spectral line","level":2,"score":0.4656304717063904},{"id":"https://openalex.org/C75473681","wikidata":"https://www.wikidata.org/wiki/Q188651","display_name":"Photochemistry","level":1,"score":0.4516535997390747},{"id":"https://openalex.org/C152365726","wikidata":"https://www.wikidata.org/wiki/Q1048589","display_name":"Density functional theory","level":2,"score":0.4434373080730438},{"id":"https://openalex.org/C113196181","wikidata":"https://www.wikidata.org/wiki/Q485223","display_name":"Analytical Chemistry (journal)","level":2,"score":0.32490211725234985},{"id":"https://openalex.org/C147597530","wikidata":"https://www.wikidata.org/wiki/Q369472","display_name":"Computational chemistry","level":1,"score":0.21696221828460693},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.05974188446998596},{"id":"https://openalex.org/C1276947","wikidata":"https://www.wikidata.org/wiki/Q333","display_name":"Astronomy","level":1,"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/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.1021/jp112171j","doi":"https://doi.org/10.1021/jp112171j","is_oa":false,"landing_page_url":"https://doi.org/10.1021/jp112171j","pdf_url":null,"source":{"id":"https://openalex.org/S146709414","display_name":"The Journal of Physical Chemistry A","issn_l":"1089-5639","issn":["1089-5639","1520-5215"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-c","jufo-1","ki-jl-1","medline","norway-1","poland-100","russia-white-list-2","vabb-shw"],"host_organization":"https://openalex.org/P4310320006","host_organization_name":"American Chemical Society","host_organization_lineage":["https://openalex.org/P4310320006"],"host_organization_lineage_names":["American Chemical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The Journal of Physical Chemistry A","raw_type":"journal-article"},{"id":"pmid:21568303","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/21568303","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"The journal of physical chemistry. A","raw_type":"Journal Article"},{"id":"pmh:oai:figshare.com:article/23358806","doi":null,"is_oa":true,"landing_page_url":"https://figshare.com/articles/journal_contribution/Ultraviolet_Photofragmentation_Spectroscopy_of_Alkaline_Earth_Dication_Complexes_with_Pyridine_and_4-Picoline_4-Methyl_pyridine_/23358806","pdf_url":null,"source":{"id":"https://openalex.org/S4377196282","display_name":"Figshare","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4210132348","host_organization_name":"Figshare (United Kingdom)","host_organization_lineage":["https://openalex.org/I4210132348"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"}],"best_oa_location":{"id":"pmh:oai:figshare.com:article/23358806","doi":null,"is_oa":true,"landing_page_url":"https://figshare.com/articles/journal_contribution/Ultraviolet_Photofragmentation_Spectroscopy_of_Alkaline_Earth_Dication_Complexes_with_Pyridine_and_4-Picoline_4-Methyl_pyridine_/23358806","pdf_url":null,"source":{"id":"https://openalex.org/S4377196282","display_name":"Figshare","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4210132348","host_organization_name":"Figshare (United Kingdom)","host_organization_lineage":["https://openalex.org/I4210132348"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":52,"referenced_works":["https://openalex.org/W1486881477","https://openalex.org/W1607426748","https://openalex.org/W1973798002","https://openalex.org/W1992963114","https://openalex.org/W1994688421","https://openalex.org/W2006511328","https://openalex.org/W2007492765","https://openalex.org/W2008105736","https://openalex.org/W2012745852","https://openalex.org/W2013945397","https://openalex.org/W2017915478","https://openalex.org/W2030687437","https://openalex.org/W2033577225","https://openalex.org/W2036860653","https://openalex.org/W2038533471","https://openalex.org/W2041102233","https://openalex.org/W2045372360","https://openalex.org/W2049745077","https://openalex.org/W2059393896","https://openalex.org/W2061064436","https://openalex.org/W2063839662","https://openalex.org/W2067053959","https://openalex.org/W2069884288","https://openalex.org/W2077090501","https://openalex.org/W2086957099","https://openalex.org/W2091883053","https://openalex.org/W2092305835","https://openalex.org/W2108446403","https://openalex.org/W2110508988","https://openalex.org/W2113046727","https://openalex.org/W2118015390","https://openalex.org/W2126981347","https://openalex.org/W2128492646","https://openalex.org/W2136880408","https://openalex.org/W2144807391","https://openalex.org/W2146544872","https://openalex.org/W2150345533","https://openalex.org/W2151324716","https://openalex.org/W2154923721","https://openalex.org/W2157854423","https://openalex.org/W2160765180","https://openalex.org/W2162765997","https://openalex.org/W2169590195","https://openalex.org/W2173141818","https://openalex.org/W2949375599","https://openalex.org/W3036723969","https://openalex.org/W3102526660","https://openalex.org/W3129292152","https://openalex.org/W3144642009","https://openalex.org/W4233869395","https://openalex.org/W4254337342","https://openalex.org/W4388245583"],"related_works":["https://openalex.org/W2092305835","https://openalex.org/W2134350649","https://openalex.org/W1969511096","https://openalex.org/W2265019386","https://openalex.org/W2146544872","https://openalex.org/W2019186224","https://openalex.org/W1988413250","https://openalex.org/W1993569566","https://openalex.org/W1981524615","https://openalex.org/W2779945743"],"abstract_inverted_index":{"A":[0],"detailed":[1],"experimental":[2,161],"and":[3,22,27,41,122,142,172],"theoretical":[4],"study":[5],"has":[6,51,102],"been":[7,35,52,103],"undertaken":[8],"of":[9,14,58,71,82,94,159,186],"the":[10,15,38,59,69,89,115,125,133,150,160,170,174,187],"UV":[11,64,164],"photofragmentation":[12],"spectroscopy":[13],"alkaline":[16],"earth":[17],"metal":[18,87],"dications":[19],"Mg(2+),":[20],"Ca(2+),":[21],"Sr(2+)":[23],"complexed":[24],"with":[25,73,193],"pyridine":[26,29,151],"4-methyl":[28],"(4-picoline).":[30],"The":[31,153],"ion":[32,45],"complexes":[33,117,171],"have":[34],"prepared":[36],"using":[37],"pick-up":[39],"technique":[40],"held":[42],"in":[43,114,169],"an":[44],"trap":[46],"where":[47,163],"their":[48],"internal":[49],"temperature":[50],"reduced":[53],"to":[54,62,68,105,167,191],"<150":[55],"K.":[56],"Exposure":[57],"trapped":[60],"ions":[61],"tunable":[63],"laser":[65],"radiation":[66],"leads":[67],"appearance":[70],"photofragments":[72],"intensities":[74],"that":[75,110,132],"show":[76,92,131],"significant":[77],"variation":[78],"as":[79],"a":[80],"function":[81],"wavelength.":[83],"For":[84],"all":[85],"three":[86],"dications,":[88],"resultant":[90],"spectra":[91,134,162,188],"evidence":[93],"resolved":[95],"features.":[96],"Time-dependent":[97],"density":[98],"functional":[99],"theory":[100],"(TDDFT)":[101],"used":[104],"identify":[106,156],"possible":[107],"electronic":[108],"transitions":[109,147,165],"might":[111],"be":[112],"present":[113],"[M(pyridine)(4)](2+)":[116],"(M":[118],"=":[119],"Mg,":[120],"Ca,":[121],"Sr)":[123],"within":[124],"wavelength":[126],"range":[127],"studied.":[128],"These":[129],"calculations":[130,154],"are":[135,180,189],"dominated":[136],"by":[137],"strong":[138],"\u03c0*":[139,144],"\u2190":[140,145],"\u03c0":[141],"weaker":[143],"n":[146],"localized":[148],"on":[149],"ligands.":[152],"correctly":[155],"those":[157],"regions":[158],"begin":[166],"occur":[168],"also":[173],"wavelengths":[175],"at":[176],"which":[177],"absorption":[178],"maxima":[179],"reached;":[181],"however,":[182],"more":[183],"subtle":[184],"features":[185],"difficult":[190],"assign":[192],"confidence.":[194]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2019,"cited_by_count":1},{"year":2014,"cited_by_count":1},{"year":2013,"cited_by_count":2}],"updated_date":"2026-09-22T06:50:58.402377","created_date":"2016-06-24T00:00:00"}