Get quick answers to your questions about the article from our AI researcher chatbot
{'id': 'https://openalex.org/W3159408147', 'doi': 'https://doi.org/10.1109/access.2021.3075998', 'title': 'Design of a Database-Driven Excavation Assist Controller Based on the Velocity of the Center-of-Mass for a Hydraulic Excavator', 'display_name': 'Design of a Database-Driven Excavation Assist Controller Based on the Velocity of the Center-of-Mass for a Hydraulic Excavator', 'publication_year': 2021, 'publication_date': '2021-01-01', 'ids': {'openalex': 'https://openalex.org/W3159408147', 'doi': 'https://doi.org/10.1109/access.2021.3075998', 'mag': '3159408147'}, 'language': 'en', 'primary_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1109/access.2021.3075998', 'pdf_url': 'https://ieeexplore.ieee.org/ielx7/6287639/9312710/09416704.pdf', 'source': {'id': 'https://openalex.org/S2485537415', 'display_name': 'IEEE Access', 'issn_l': '2169-3536', 'issn': ['2169-3536'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319808', 'host_organization_name': 'Institute of Electrical and Electronics Engineers', 'host_organization_lineage': ['https://openalex.org/P4310319808'], 'host_organization_lineage_names': ['Institute of Electrical and Electronics Engineers'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'type': 'article', 'type_crossref': 'journal-article', 'indexed_in': ['crossref', 'doaj'], 'open_access': {'is_oa': True, 'oa_status': 'gold', 'oa_url': 'https://ieeexplore.ieee.org/ielx7/6287639/9312710/09416704.pdf', 'any_repository_has_fulltext': False}, 'authorships': [{'author_position': 'first', 'author': {'id': 'https://openalex.org/A5024839571', 'display_name': 'Masatoshi Kozui', 'orcid': 'https://orcid.org/0000-0002-8944-4569'}, 'institutions': [{'id': 'https://openalex.org/I113306721', 'display_name': 'Hiroshima University', 'ror': 'https://ror.org/03t78wx29', 'country_code': 'JP', 'type': 'education', 'lineage': ['https://openalex.org/I113306721']}], 'countries': ['JP'], 'is_corresponding': False, 'raw_author_name': 'Masatoshi Kozui', 'raw_affiliation_strings': ['Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan'], 'affiliations': [{'raw_affiliation_string': 'Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan', 'institution_ids': ['https://openalex.org/I113306721']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5070300491', 'display_name': 'Toru Yamamoto', 'orcid': 'https://orcid.org/0000-0001-6500-8394'}, 'institutions': [{'id': 'https://openalex.org/I113306721', 'display_name': 'Hiroshima University', 'ror': 'https://ror.org/03t78wx29', 'country_code': 'JP', 'type': 'education', 'lineage': ['https://openalex.org/I113306721']}], 'countries': ['JP'], 'is_corresponding': False, 'raw_author_name': 'Toru Yamamoto', 'raw_affiliation_strings': ['Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan'], 'affiliations': [{'raw_affiliation_string': 'Graduate School of Advanced Science and Engineering, Hiroshima University, Hiroshima, Japan', 'institution_ids': ['https://openalex.org/I113306721']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5110081771', 'display_name': 'Hideo Yoshihara', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I4210146650', 'display_name': 'Kobelco Construction Machinery (Japan)', 'ror': 'https://ror.org/04a307s36', 'country_code': 'JP', 'type': 'company', 'lineage': ['https://openalex.org/I4210146650']}], 'countries': ['JP'], 'is_corresponding': False, 'raw_author_name': 'Hideo Yoshihara', 'raw_affiliation_strings': ['KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan'], 'affiliations': [{'raw_affiliation_string': 'KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan', 'institution_ids': ['https://openalex.org/I4210146650']}]}, {'author_position': 'middle', 'author': {'id': 'https://openalex.org/A5045665481', 'display_name': 'Kazushige Koiwai', 'orcid': None}, 'institutions': [{'id': 'https://openalex.org/I4210146650', 'display_name': 'Kobelco Construction Machinery (Japan)', 'ror': 'https://ror.org/04a307s36', 'country_code': 'JP', 'type': 'company', 'lineage': ['https://openalex.org/I4210146650']}], 'countries': ['JP'], 'is_corresponding': False, 'raw_author_name': 'Kazushige Koiwai', 'raw_affiliation_strings': ['KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan'], 'affiliations': [{'raw_affiliation_string': 'KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan', 'institution_ids': ['https://openalex.org/I4210146650']}]}, {'author_position': 'last', 'author': {'id': 'https://openalex.org/A5000048734', 'display_name': 'Koji Yamashita', 'orcid': 'https://orcid.org/0000-0002-1892-2455'}, 'institutions': [{'id': 'https://openalex.org/I4210146650', 'display_name': 'Kobelco Construction Machinery (Japan)', 'ror': 'https://ror.org/04a307s36', 'country_code': 'JP', 'type': 'company', 'lineage': ['https://openalex.org/I4210146650']}], 'countries': ['JP'], 'is_corresponding': False, 'raw_author_name': 'Koji Yamashita', 'raw_affiliation_strings': ['KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan'], 'affiliations': [{'raw_affiliation_string': 'KOBELCO Construction Machinery Company Ltd., Hiroshima, Japan', 'institution_ids': ['https://openalex.org/I4210146650']}]}], 'institution_assertions': [], 'countries_distinct_count': 1, 'institutions_distinct_count': 2, 'corresponding_author_ids': [], 'corresponding_institution_ids': [], 'apc_list': {'value': 1850, 'currency': 'USD', 'value_usd': 1850, 'provenance': 'doaj'}, 'apc_paid': {'value': 1850, 'currency': 'USD', 'value_usd': 1850, 'provenance': 'doaj'}, 'fwci': 1.078, 'has_fulltext': True, 'fulltext_origin': 'pdf', 'cited_by_count': 10, 'citation_normalized_percentile': {'value': 0.999972, 'is_in_top_1_percent': True, 'is_in_top_10_percent': True}, 'cited_by_percentile_year': {'min': 87, 'max': 88}, 'biblio': {'volume': '9', 'issue': None, 'first_page': '64776', 'last_page': '64784'}, 'is_retracted': False, 'is_paratext': False, 'primary_topic': {'id': 'https://openalex.org/T11372', 'display_name': 'Hydraulic and Pneumatic Systems', 'score': 0.9996, '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'}}, 'topics': [{'id': 'https://openalex.org/T11372', 'display_name': 'Hydraulic and Pneumatic Systems', 'score': 0.9996, '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/T14474', 'display_name': 'Industrial Technology and Control Systems', 'score': 0.9924, 'subfield': {'id': 'https://openalex.org/subfields/2207', 'display_name': 'Control and Systems 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/T13644', 'display_name': 'Control Systems in Engineering', 'score': 0.9784, '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'}}], 'keywords': [{'id': 'https://openalex.org/keywords/excavator', 'display_name': 'Excavator', 'score': 0.99450696}, {'id': 'https://openalex.org/keywords/operator', 'display_name': 'Operator (biology)', 'score': 0.49929118}, {'id': 'https://openalex.org/keywords/center-of-gravity', 'display_name': 'Center of gravity', 'score': 0.43499237}], 'concepts': [{'id': 'https://openalex.org/C141392084', 'wikidata': 'https://www.wikidata.org/wiki/Q182661', 'display_name': 'Excavator', 'level': 2, 'score': 0.99450696}, {'id': 'https://openalex.org/C203479927', 'wikidata': 'https://www.wikidata.org/wiki/Q5165939', 'display_name': 'Controller (irrigation)', 'level': 2, 'score': 0.52492577}, {'id': 'https://openalex.org/C17020691', 'wikidata': 'https://www.wikidata.org/wiki/Q139677', 'display_name': 'Operator (biology)', 'level': 5, 'score': 0.49929118}, {'id': 'https://openalex.org/C204983608', 'wikidata': 'https://www.wikidata.org/wiki/Q2111958', 'display_name': 'Productivity', 'level': 2, 'score': 0.48996392}, {'id': 'https://openalex.org/C41008148', 'wikidata': 'https://www.wikidata.org/wiki/Q21198', 'display_name': 'Computer science', 'level': 0, 'score': 0.48590723}, {'id': 'https://openalex.org/C11394606', 'wikidata': 'https://www.wikidata.org/wiki/Q1972552', 'display_name': 'Hydraulic machinery', 'level': 2, 'score': 0.4720208}, {'id': 'https://openalex.org/C31858485', 'wikidata': 'https://www.wikidata.org/wiki/Q959782', 'display_name': 'Excavation', 'level': 2, 'score': 0.46926874}, {'id': 'https://openalex.org/C2908647359', 'wikidata': 'https://www.wikidata.org/wiki/Q2625603', 'display_name': 'Population', 'level': 2, 'score': 0.46502662}, {'id': 'https://openalex.org/C158622935', 'wikidata': 'https://www.wikidata.org/wiki/Q660848', 'display_name': 'Nonlinear system', 'level': 2, 'score': 0.46328822}, {'id': 'https://openalex.org/C18762648', 'wikidata': 'https://www.wikidata.org/wiki/Q42213', 'display_name': 'Work (physics)', 'level': 2, 'score': 0.43832403}, {'id': 'https://openalex.org/C132668919', 'wikidata': 'https://www.wikidata.org/wiki/Q1110236', 'display_name': 'Center of gravity', 'level': 2, 'score': 0.43499237}, {'id': 'https://openalex.org/C127413603', 'wikidata': 'https://www.wikidata.org/wiki/Q11023', 'display_name': 'Engineering', 'level': 0, 'score': 0.38932863}, {'id': 'https://openalex.org/C133731056', 'wikidata': 'https://www.wikidata.org/wiki/Q4917288', 'display_name': 'Control engineering', 'level': 1, 'score': 0.33714813}, {'id': 'https://openalex.org/C78519656', 'wikidata': 'https://www.wikidata.org/wiki/Q101333', 'display_name': 'Mechanical engineering', 'level': 1, 'score': 0.29900944}, {'id': 'https://openalex.org/C187320778', 'wikidata': 'https://www.wikidata.org/wiki/Q1349130', 'display_name': 'Geotechnical engineering', 'level': 1, 'score': 0.12239602}, {'id': 'https://openalex.org/C185592680', 'wikidata': 'https://www.wikidata.org/wiki/Q2329', 'display_name': 'Chemistry', 'level': 0, '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/C6557445', 'wikidata': 'https://www.wikidata.org/wiki/Q173113', 'display_name': 'Agronomy', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C86803240', 'wikidata': 'https://www.wikidata.org/wiki/Q420', 'display_name': 'Biology', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C55493867', 'wikidata': 'https://www.wikidata.org/wiki/Q7094', 'display_name': 'Biochemistry', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C149923435', 'wikidata': 'https://www.wikidata.org/wiki/Q37732', 'display_name': 'Demography', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C139719470', 'wikidata': 'https://www.wikidata.org/wiki/Q39680', 'display_name': 'Macroeconomics', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C187736073', 'wikidata': 'https://www.wikidata.org/wiki/Q2920921', 'display_name': 'Management', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C158448853', 'wikidata': 'https://www.wikidata.org/wiki/Q425218', 'display_name': 'Repressor', 'level': 4, 'score': 0.0}, {'id': 'https://openalex.org/C62520636', 'wikidata': 'https://www.wikidata.org/wiki/Q944', 'display_name': 'Quantum mechanics', 'level': 1, 'score': 0.0}, {'id': 'https://openalex.org/C144024400', 'wikidata': 'https://www.wikidata.org/wiki/Q21201', 'display_name': 'Sociology', 'level': 0, 'score': 0.0}, {'id': 'https://openalex.org/C104317684', 'wikidata': 'https://www.wikidata.org/wiki/Q7187', 'display_name': 'Gene', 'level': 2, 'score': 0.0}, {'id': 'https://openalex.org/C86339819', 'wikidata': 'https://www.wikidata.org/wiki/Q407384', 'display_name': 'Transcription factor', 'level': 3, 'score': 0.0}, {'id': 'https://openalex.org/C162324750', 'wikidata': 'https://www.wikidata.org/wiki/Q8134', 'display_name': 'Economics', 'level': 0, 'score': 0.0}], 'mesh': [], 'locations_count': 2, 'locations': [{'is_oa': True, 'landing_page_url': 'https://doi.org/10.1109/access.2021.3075998', 'pdf_url': 'https://ieeexplore.ieee.org/ielx7/6287639/9312710/09416704.pdf', 'source': {'id': 'https://openalex.org/S2485537415', 'display_name': 'IEEE Access', 'issn_l': '2169-3536', 'issn': ['2169-3536'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319808', 'host_organization_name': 'Institute of Electrical and Electronics Engineers', 'host_organization_lineage': ['https://openalex.org/P4310319808'], 'host_organization_lineage_names': ['Institute of Electrical and Electronics Engineers'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, {'is_oa': False, 'landing_page_url': 'https://doaj.org/article/167a70bcacf346bd85dc4a2ebf0e5a59', 'pdf_url': None, 'source': {'id': 'https://openalex.org/S4306401280', 'display_name': 'DOAJ (DOAJ: Directory of Open Access Journals)', 'issn_l': None, 'issn': None, 'is_oa': True, 'is_in_doaj': False, 'is_core': False, 'host_organization': None, 'host_organization_name': None, 'host_organization_lineage': [], 'host_organization_lineage_names': [], 'type': 'repository'}, 'license': None, 'license_id': None, 'version': None, 'is_accepted': False, 'is_published': False}], 'best_oa_location': {'is_oa': True, 'landing_page_url': 'https://doi.org/10.1109/access.2021.3075998', 'pdf_url': 'https://ieeexplore.ieee.org/ielx7/6287639/9312710/09416704.pdf', 'source': {'id': 'https://openalex.org/S2485537415', 'display_name': 'IEEE Access', 'issn_l': '2169-3536', 'issn': ['2169-3536'], 'is_oa': True, 'is_in_doaj': True, 'is_core': True, 'host_organization': 'https://openalex.org/P4310319808', 'host_organization_name': 'Institute of Electrical and Electronics Engineers', 'host_organization_lineage': ['https://openalex.org/P4310319808'], 'host_organization_lineage_names': ['Institute of Electrical and Electronics Engineers'], 'type': 'journal'}, 'license': 'cc-by', 'license_id': 'https://openalex.org/licenses/cc-by', 'version': 'publishedVersion', 'is_accepted': True, 'is_published': True}, 'sustainable_development_goals': [{'score': 0.61, 'display_name': 'Industry, innovation and infrastructure', 'id': 'https://metadata.un.org/sdg/9'}], 'grants': [], 'datasets': [], 'versions': [], 'referenced_works_count': 22, 'referenced_works': ['https://openalex.org/W1902604561', 'https://openalex.org/W1931466024', 'https://openalex.org/W1989694830', 'https://openalex.org/W2066380996', 'https://openalex.org/W2111114236', 'https://openalex.org/W2137300190', 'https://openalex.org/W2141185589', 'https://openalex.org/W2145967676', 'https://openalex.org/W2313388030', 'https://openalex.org/W2524404487', 'https://openalex.org/W2554962600', 'https://openalex.org/W2577499189', 'https://openalex.org/W2612490095', 'https://openalex.org/W2728742905', 'https://openalex.org/W2765672914', 'https://openalex.org/W2792964616', 'https://openalex.org/W2921146143', 'https://openalex.org/W2935295173', 'https://openalex.org/W2944849234', 'https://openalex.org/W2993902291', 'https://openalex.org/W4252410581', 'https://openalex.org/W652070477'], 'related_works': ['https://openalex.org/W2685432580', 'https://openalex.org/W2615517732', 'https://openalex.org/W2385171745', 'https://openalex.org/W2375495702', 'https://openalex.org/W2367611726', 'https://openalex.org/W2365516089', 'https://openalex.org/W2353454476', 'https://openalex.org/W2353365536', 'https://openalex.org/W2129548681', 'https://openalex.org/W1570975970'], 'abstract_inverted_index': {'In': [0, 67, 98, 128], 'recent': [1], 'years,': [2], 'the': [3, 7, 14, 24, 51, 62, 76, 79, 101, 104, 108, 116, 135, 142, 145, 149, 154, 162], 'working': [4], 'population': [5], 'in': [6, 26, 118, 137], 'construction': [8, 17, 45], 'industry': [9], 'has': [10], 'been': [11], 'declining.': [12], 'However,': [13, 57], 'number': [15], 'of': [16, 23, 54, 64, 78, 87, 103, 107, 121, 144, 148, 165], 'works': [18], 'projects': [19], 'is': [20, 33, 47, 59, 70, 126, 151, 157, 172, 181], 'increasing': [21, 38], 'because': [22], 'increase': [25], 'development': [27], 'and': [28, 72, 178], 'infrastructure': [29], 'maintenance.': [30], 'Therefore,': [31, 89], 'it': [32, 69], 'necessary': [34], 'to': [35, 74, 82, 94, 159, 161], 'meet': [36], 'this': [37, 99], 'demand': [39], 'with': [40], 'limited': [41], 'resources.': [42], 'Productivity': [43], 'at': [44], 'sites': [46], 'significantly': [48], 'improved': [49], 'through': [50], 'extensive': [52], 'use': [53], 'hydraulic': [55, 124, 167, 176], 'excavators.': [56], 'productivity': [58], 'affected': [60], 'by': [61], 'skill': [63], 'excavator': [65, 109, 177], 'operator.': [66], 'addition,': [68, 129], 'difficult': [71], 'time-consuming': [73], 'learn': [75], 'operation': [77, 136], 'machines': [80], 'required': [81], 'achieve': [83, 95], 'an': [84, 112], 'efficient': [85], 'level': [86], 'work.': [88], 'novice': [90], 'operators': [91, 122], 'need': [92], 'support': [93], 'high': [96], 'productivity.': [97], 'study,': [100], 'behavior': [102], 'combined': [105, 146], 'center-of-mass': [106, 147], 'attachment': [110, 150], 'as': [111], 'index': [113], 'that': [114, 133], 'expresses': [115], 'difference': [117], 'operating': [119], 'characteristics': [120, 164], 'for': [123], 'excavators': [125], 'focused.': [127], 'a': [130, 166, 175], 'control': [131, 156], 'system': [132], 'assists': [134], 'excavation': [138], 'work': [139], 'based': [140], 'on': [141, 174], 'velocity': [143], 'proposed.': [152], 'Furthermore,': [153], 'database-driven': [155], 'applied': [158], 'correspond': [160], 'nonlinear': [163], 'excavator.': [168], 'The': [169], 'proposed': [170], 'method': [171], 'implemented': [173], 'its': [179], 'effectiveness': [180], 'verified.': [182]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W3159408147', 'counts_by_year': [{'year': 2024, 'cited_by_count': 3}, {'year': 2023, 'cited_by_count': 4}, {'year': 2022, 'cited_by_count': 2}, {'year': 2021, 'cited_by_count': 1}], 'updated_date': '2024-12-16T11:21:45.073416', 'created_date': '2021-05-10'}