{"id":"https://openalex.org/A5045664148","orcid":"https://orcid.org/0000-0003-2270-743X","observed_orcids":["https://orcid.org/0000-0003-2270-743X"],"display_name":"Ndigui Billong","raw_author_names":["Billong Ndigui","N Billong","N. Billong","NDIGUI BILLONG","Ndigui Billong","Ndigui Bilong"],"full_name":"Ndigui Billong","works_count":42,"cited_by_count":1196,"summary_stats":{"2yr_mean_citedness":3.0,"h_index":15,"i10_index":19},"ids":{"openalex":"https://openalex.org/A5045664148","orcid":"https://orcid.org/0000-0003-2270-743X","observed_orcids":["https://orcid.org/0000-0003-2270-743X"]},"affiliations":[{"institution":{"id":"https://openalex.org/I1331070479","ror":"https://ror.org/022zbs961","display_name":"Universit\u00e9 de Yaound\u00e9 I","country_code":"CM","type":"education","lineage":["https://openalex.org/I1331070479"]},"years":[2020,2013,2011,2010,2009,2008]},{"institution":{"id":"https://openalex.org/I163423212","ror":"https://ror.org/02zr5jr81","display_name":"University of Douala","country_code":"CM","type":"education","lineage":["https://openalex.org/I163423212"]},"years":[2021]},{"institution":{"id":"https://openalex.org/I4405253939","ror":"https://ror.org/017rv5x19","display_name":"Mission de Promotion des Materiaux Locaux","country_code":"CM","type":"education","lineage":["https://openalex.org/I4405253939"]},"years":[2026,2025,2024,2023,2022,2021,2020,2019,2018,2017,2016,2011,2010,2009,2008,2007,2005]}],"last_known_institutions":[{"id":"https://openalex.org/I4405253939","ror":"https://ror.org/017rv5x19","display_name":"Mission de Promotion des Materiaux Locaux","country_code":"CM","type":"education","lineage":["https://openalex.org/I4405253939"]}],"topics":[{"id":"https://openalex.org/T10033","display_name":"Concrete and Cement Materials Research","count":29,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11672","display_name":"Recycling and utilization of industrial and municipal waste in materials production","count":16,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13140","display_name":"Materials Engineering and Processing","count":10,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11643","display_name":"Building materials and conservation","count":8,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12105","display_name":"Hygrothermal properties of building materials","count":8,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"topic_share":[{"id":"https://openalex.org/T13039","display_name":"Magnesium Oxide Properties and Applications","value":0.000118,"subfield":{"id":"https://openalex.org/subfields/2505","display_name":"Materials Chemistry"},"field":{"id":"https://openalex.org/fields/25","display_name":"Materials Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11672","display_name":"Recycling and utilization of industrial and municipal waste in materials production","value":7.27e-05,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10033","display_name":"Concrete and Cement Materials Research","value":6.44e-05,"subfield":{"id":"https://openalex.org/subfields/2205","display_name":"Civil and Structural Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11643","display_name":"Building materials and conservation","value":6.03e-05,"subfield":{"id":"https://openalex.org/subfields/1904","display_name":"Earth-Surface Processes"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12105","display_name":"Hygrothermal properties of building materials","value":5.96e-05,"subfield":{"id":"https://openalex.org/subfields/2215","display_name":"Building and Construction"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.8957685232162476},{"id":"30407753","wikidata":"https://www.wikidata.org/wiki/Q186191","display_name":"Compressive strength","score":0.8496628999710083},{"id":"159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","score":0.7751357555389404},{"id":"127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","score":0.5153784155845642},{"id":"191897082","wikidata":"https://www.wikidata.org/wiki/Q11467","display_name":"Metallurgy","score":0.4593999981880188}],"counts_by_year":[{"year":2005,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2007,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2008,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2009,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2010,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2011,"works_count":1,"oa_works_count":1,"cited_by_count":0},{"year":2012,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2013,"works_count":2,"oa_works_count":2,"cited_by_count":14},{"year":2014,"works_count":0,"oa_works_count":0,"cited_by_count":8},{"year":2015,"works_count":0,"oa_works_count":0,"cited_by_count":10},{"year":2016,"works_count":2,"oa_works_count":1,"cited_by_count":18},{"year":2017,"works_count":3,"oa_works_count":1,"cited_by_count":30},{"year":2018,"works_count":2,"oa_works_count":0,"cited_by_count":29},{"year":2019,"works_count":1,"oa_works_count":0,"cited_by_count":47},{"year":2020,"works_count":4,"oa_works_count":3,"cited_by_count":95},{"year":2021,"works_count":8,"oa_works_count":2,"cited_by_count":145},{"year":2022,"works_count":4,"oa_works_count":3,"cited_by_count":142},{"year":2023,"works_count":4,"oa_works_count":4,"cited_by_count":154},{"year":2024,"works_count":2,"oa_works_count":1,"cited_by_count":180},{"year":2025,"works_count":2,"oa_works_count":1,"cited_by_count":166},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":129}],"display_name_alternatives":["Billong Ndigui","N Billong","N. Billong","NDIGUI BILLONG","Ndigui Billong","Ndigui Bilong"],"block_key":"n billong","works_api_url":"https://api.openalex.org/works?filter=author.id:A5045664148","updated_date":"2026-11-08T12:57:04","created_date":"2016-06-24T00:00:00"}