{"id":"https://openalex.org/A5049259082","orcid":"https://orcid.org/0009-0004-2174-7709","observed_orcids":["https://orcid.org/0009-0004-2174-7709","https://orcid.org/0009-0006-4074-6765"],"display_name":"Mahamat Barka","raw_author_names":["Abdallah Mahamat","Barka Mahamat","Mahamat Barka"],"full_name":"Mahamat Barka","works_count":24,"cited_by_count":149,"summary_stats":{"2yr_mean_citedness":0.75,"h_index":6,"i10_index":5},"ids":{"openalex":"https://openalex.org/A5049259082","orcid":"https://orcid.org/0009-0004-2174-7709","observed_orcids":["https://orcid.org/0009-0004-2174-7709","https://orcid.org/0009-0006-4074-6765"]},"affiliations":[{"institution":{"id":"https://openalex.org/I117723502","ror":"https://ror.org/013gpqv08","display_name":"University of N'Djamena","country_code":"TD","type":"education","lineage":["https://openalex.org/I117723502"]},"years":[2026,2025,2024,2023,2022,2021,2020,2019,2017,2016,2015]},{"institution":{"id":"https://openalex.org/I4210130700","ror":"https://ror.org/035rgqg63","display_name":"Institut National Sup\u00e9rieur des Sciences et Techniques d'Ab\u00e9ch\u00e9","country_code":"TD","type":"education","lineage":["https://openalex.org/I4210130700"]},"years":[2025,2015]}],"last_known_institutions":[{"id":"https://openalex.org/I117723502","ror":"https://ror.org/013gpqv08","display_name":"University of N'Djamena","country_code":"TD","type":"education","lineage":["https://openalex.org/I117723502"]}],"topics":[{"id":"https://openalex.org/T12105","display_name":"Hygrothermal properties of building materials","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/T11672","display_name":"Recycling and utilization of industrial and municipal waste in materials production","count":6,"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/T11375","display_name":"Geotechnical Engineering and Soil Stabilization","count":5,"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/T10905","display_name":"Solar Thermal and Photovoltaic 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/T13236","display_name":"Geotechnical and construction materials studies","count":4,"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"}}],"topic_share":[{"id":"https://openalex.org/T12105","display_name":"Hygrothermal properties of building materials","value":7.45e-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/T11672","display_name":"Recycling and utilization of industrial and municipal waste in materials production","value":2.72e-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/T12008","display_name":"Solar-Powered Water Purification Methods","value":2.48e-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/T13298","display_name":"Solar Energy Systems and Technologies","value":2.48e-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/T11276","display_name":"Solar Radiation and Photovoltaics","value":2.42e-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"}}],"x_concepts":[{"id":"192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","score":0.7802115678787231},{"id":"121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","score":0.7640665173530579},{"id":"159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","score":0.620199978351593},{"id":"39432304","wikidata":"https://www.wikidata.org/wiki/Q188847","display_name":"Environmental science","score":0.6034590601921082},{"id":"127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","score":0.4190448820590973}],"counts_by_year":[{"year":1998,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2014,"works_count":1,"oa_works_count":0,"cited_by_count":0},{"year":2015,"works_count":2,"oa_works_count":2,"cited_by_count":1},{"year":2016,"works_count":1,"oa_works_count":1,"cited_by_count":1},{"year":2017,"works_count":3,"oa_works_count":3,"cited_by_count":5},{"year":2018,"works_count":0,"oa_works_count":0,"cited_by_count":2},{"year":2019,"works_count":1,"oa_works_count":1,"cited_by_count":7},{"year":2020,"works_count":2,"oa_works_count":2,"cited_by_count":5},{"year":2021,"works_count":1,"oa_works_count":0,"cited_by_count":13},{"year":2022,"works_count":2,"oa_works_count":1,"cited_by_count":26},{"year":2023,"works_count":2,"oa_works_count":2,"cited_by_count":18},{"year":2024,"works_count":1,"oa_works_count":0,"cited_by_count":27},{"year":2025,"works_count":6,"oa_works_count":6,"cited_by_count":27},{"year":2026,"works_count":1,"oa_works_count":1,"cited_by_count":15}],"display_name_alternatives":["Abdallah Mahamat","Barka Mahamat","Mahamat Barka"],"block_key":"m barka","works_api_url":"https://api.openalex.org/works?filter=author.id:A5049259082","updated_date":"2026-11-07T12:08:38","created_date":"2016-06-24T00:00:00"}