{"id":"https://openalex.org/A5011544602","orcid":"https://orcid.org/0000-0002-9632-3845","observed_orcids":["https://orcid.org/0000-0002-9632-3845"],"display_name":"Nofirman Firdaus","raw_author_names":["N Firdaus","Nofirman Firdaus"],"full_name":"Nofirman Firdaus","works_count":15,"cited_by_count":147,"summary_stats":{"2yr_mean_citedness":1.5,"h_index":6,"i10_index":5},"ids":{"openalex":"https://openalex.org/A5011544602","orcid":"https://orcid.org/0000-0002-9632-3845","observed_orcids":["https://orcid.org/0000-0002-9632-3845"]},"affiliations":[{"institution":{"id":"https://openalex.org/I139322472","ror":"https://ror.org/02rgb2k63","display_name":"Universiti Sains Malaysia","country_code":"MY","type":"education","lineage":["https://openalex.org/I139322472"]},"years":[2024,2020,2019]},{"institution":{"id":"https://openalex.org/I4210161095","ror":"https://ror.org/058thb585","display_name":"Badan Pengkajian dan Penerapan Teknologi","country_code":"ID","type":"government","lineage":["https://openalex.org/I4210161095","https://openalex.org/I4387154144"]},"years":[2017]},{"institution":{"id":"https://openalex.org/I4210162377","ror":"https://ror.org/052a22698","display_name":"National Institute of Science and Technology","country_code":"ID","type":"education","lineage":["https://openalex.org/I4210162377"]},"years":[2017,2016]},{"institution":{"id":"https://openalex.org/I4387153183","ror":"https://ror.org/05tdc8560","display_name":"Institut Teknologi PLN","country_code":"ID","type":"education","lineage":["https://openalex.org/I4387153183"]},"years":[2025,2024,2023,2021,2020,2019,2018]}],"last_known_institutions":[{"id":"https://openalex.org/I4387153183","ror":"https://ror.org/05tdc8560","display_name":"Institut Teknologi PLN","country_code":"ID","type":"education","lineage":["https://openalex.org/I4387153183"]}],"topics":[{"id":"https://openalex.org/T10780","display_name":"Reliability and Maintenance Optimization","count":7,"subfield":{"id":"https://openalex.org/subfields/2213","display_name":"Safety, Risk, Reliability and Quality"},"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/T11529","display_name":"Refrigeration and Air Conditioning Technologies","count":4,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical 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/T12271","display_name":"Renewable energy and sustainable power systems","count":4,"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/T10088","display_name":"Thermochemical Biomass Conversion Processes","count":3,"subfield":{"id":"https://openalex.org/subfields/2103","display_name":"Fuel Technology"},"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/T10284","display_name":"Anaerobic Digestion and Biogas Production","count":3,"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"}}],"topic_share":[{"id":"https://openalex.org/T10780","display_name":"Reliability and Maintenance Optimization","value":1.89e-05,"subfield":{"id":"https://openalex.org/subfields/2213","display_name":"Safety, Risk, Reliability and Quality"},"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/T11954","display_name":"Energy Efficiency and Management","value":1.88e-05,"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/T12938","display_name":"Material Selection and Properties","value":1.69e-05,"subfield":{"id":"https://openalex.org/subfields/2500","display_name":"General Materials Science"},"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/T11529","display_name":"Refrigeration and Air Conditioning Technologies","value":1.6e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical 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/T11941","display_name":"Power System Reliability and Maintenance","value":1.41e-05,"subfield":{"id":"https://openalex.org/subfields/2213","display_name":"Safety, Risk, Reliability and Quality"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"x_concepts":[{"id":"39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","score":0.5897707939147949},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.5154019594192505},{"id":"41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","score":0.49896717071533203},{"id":"33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","score":0.4648607671260834},{"id":"105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","score":0.3392375707626343}],"counts_by_year":[{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2016,"works_count":2,"oa_works_count":1,"cited_by_count":0},{"year":2017,"works_count":4,"oa_works_count":0,"cited_by_count":3},{"year":2018,"works_count":1,"oa_works_count":1,"cited_by_count":8},{"year":2019,"works_count":2,"oa_works_count":2,"cited_by_count":6},{"year":2020,"works_count":1,"oa_works_count":1,"cited_by_count":5},{"year":2021,"works_count":1,"oa_works_count":1,"cited_by_count":13},{"year":2022,"works_count":0,"oa_works_count":0,"cited_by_count":16},{"year":2023,"works_count":1,"oa_works_count":0,"cited_by_count":23},{"year":2024,"works_count":1,"oa_works_count":1,"cited_by_count":28},{"year":2025,"works_count":1,"oa_works_count":0,"cited_by_count":19},{"year":2026,"works_count":0,"oa_works_count":0,"cited_by_count":25}],"display_name_alternatives":["N Firdaus","Nofirman Firdaus"],"block_key":"n firdaus","works_api_url":"https://api.openalex.org/works?filter=author.id:A5011544602","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}