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Jun Konno,Yoshinobu Ando 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
In recent years, robots have been developed that can move autonomously in human environments such as restaurants and airports. For such autonomous mobility, it is important to create a map in advance, and a typical example is Simultaneous Localization and Mapping (SLAM). We created a 3D perception filter that is capable of detecting and eliminating moving point clusters from the input point cloud taken in an indoor environment. In this study, we propose a system that detects moving objects based on camera image recognition and uses the results to construct a more accurate map by minimizing the influence of pedestrians.
Koichi Yonezawa,Jun Aono,Donghyuk Kang,Hironori Horiguchi,Yutaka Kawata,Yoshinobu Tsujimoto 한국유체기계학회 2012 International journal of fluid machinery and syste Vol.5 No.3
The transfer matrix and unsteady cavitation characteristics, cavitation compliance and mass flow gain factor, of cavitating inducer were evaluated by CFD using commercial software. Quasi-steady values of cavitation compliance and mass flow gain factor were obtained first by using steady calculations at various flow rate and inlet cavitation number. Then unsteady calculations were made to determine the transfer matrix and the cavitation characteristics. The results are compared with experiments to show the validity of calculations.
Yonezawa, Koichi,Aono, Jun,Kang, Donghyuk,Horiguchi, Hironori,Kawata, Yutaka,Tsujimoto, Yoshinobu Korean Society for Fluid machinery 2012 International journal of fluid machinery and syste Vol.5 No.3
The transfer matrix and unsteady cavitation characteristics, cavitation compliance and mass flow gain factor, of cavitating inducer were evaluated by CFD using commercial software. Quasi-steady values of cavitation compliance and mass flow gain factor were obtained first by using steady calculations at various flow rate and inlet cavitation number. Then unsteady calculations were made to determine the transfer matrix and the cavitation characteristics. The results are compared with experiments to show the validity of calculations.
Fourth molar: A retrospective study and literature review of a rare clinical entity
Bamgbose, Babatunde O.,Okada, Shunsuke,Hisatomi, Miki,Yanagi, Yoshinobu,Takeshita, Yohei,Abdu, Zahrau Saleh,Ekuase, Edugie J.,Asaumi, Jun-ichi Korean Academy of Oral and Maxillofacial Radiology 2019 Imaging Science in Dentistry Vol.49 No.1
Purpose: The prevalence of supernumerary teeth has been reported to be between 0.1% and 3.8%. The aim of this study was to determine the prevalence, clinical significance, and associated pathologies of fourth molars based on a retrospective study and a literature review. Materials and Methods: A 5-year retrospective prevalence study was conducted at the Department of Oral Diagnosis and Dentomaxillofacial Radiology of Okayama University Hospital, Okayama, Japan. The study involved extracting data from the digital records of patients from January 1, 2013 through December 31, 2017. The sampling frame included all patients who had panoramic radiographs, cone-beam computed tomography (CT), and multislice CT images during the period under review. Results: A total of 26,721 cases were reviewed and 87 fourth molars were identified. The prevalence of fourth molars in the 5-year study at Okayama was calculated as 0.32%. The mean age of patients with a fourth molar was 30.43 years, and the male-to-female ratio was 1:0.98. The vast majority of cases were in the maxilla (92%) and had normal shapes(89.7%); furthermore, 82.8% of cases were unerupted. Conclusion: The prevalence of fourth molars in the study population was found to be 0.32%, and fourth molars occurred with approximately equal frequency in males and females. Fourth molars were more common in the maxilla and were predominantly unerupted and small.