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Impact of COVID-19 Infection on Work Functioning in Japanese Workers: A Prospective Cohort Study
Okawara Makoto,Hirashima Keiki,Igarashi Yu,Mafune Kosuke,Muramatsu Keiji,Nagata Tomohisa,Tsuji Mayumi,Ogami Akira,Fujino Yoshihisa,Ogami Akira,Hino Ayako,Ando Hajime,Eguchi Hisashi,Muramatsu Keiji,Mor 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.4
Background: The impact of COVID-19 infection on workers’ work function persists even after the acute phase of the infection. We studied this phenomenon in Japanese workers. Methods: We conducted a one-year prospective cohort study online, starting with a baseline survey in December 2020. We tracked workers without baseline work functioning impairment and incorporated data from 14,421 eligible individuals into the analysis. We estimated the incidence rate ratio for new onset of work functioning impairment due to COVID-19 infection during follow-up, using mixed-effects Poisson regression analysis with robust variance. Results: Participants reporting infection between January and December 2021 showed a significantly higher incidence of new work functioning impairment (adjusted incidence rate ratio: 2.18, 95% confidence interval: 1.75e2.71, p < 0.001). The formality of the recuperation environment correlated with a higher risk of work functioning deterioration in infected individuals (p for trend <0.001). Conclusion: COVID-19-infected workers may continue to experience work difficulties due to persistent, post-acute infection symptoms. Companies and society must urgently provide rehabilitation and social support for people with persistent symptoms, recognizing that COVID-19 is not just a transient acute infection.
Phase Control Technique of Circular Polarization from a Parasitic Dipole Mounted above a Slot
민경식,Makoto Ando 에스케이텔레콤 (주) 1997 Telecommunications Review Vol.7 No.5
This paper describes the phase control technique of circular polarization from a parasitic dipole mounted above a slot. The principle of a phase control and the characteristics of circular polarization from a slot with a parasitic dipole are investigated analytically. It is derived that its phase is linearly dependent upon the angle of the dipole and is independent of that of slot. This interesting behavior is also confirmed by experiments.
Collaboration Technique of RT-Middleware with the Existing Simulator
Tsunehiko FUJITA,Makoto MIZUKAWA,Yoshinobu ANDO 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
The developments of the robots usually depend on their own original specifications. Therefore, the reuse of the robot technologies and/or components is difficult and their development processes required much time and high cost. The National Institute of Advanced Industrial Science and Technology developed RT-Middleware to solve the above problems by modularizing and defining a framework of RT-Component. The development efficiency is improved by using RT-Middleware. However, there is still a problem that there are only few simulators which correspond to RT-Middleware. For the reason, in this paper we focus to simulate the robot, which adopts the RT-Middleware by using an existing simulator. As the result, the system developers can simulate their own system easily.
Improvement of Robustness of the Dual Floor Image Tracking Odometry Measurement
Takahiro TAKASU,Makoto MIZUKAWA,Yoshinobu ANDO 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Dual Floor Image Tracking (DFIT) is a dead reckoning component, which acquires optical flows of ground images from two cameras. The robot that is equipped with the DFIT can measure its position and rotation without being affected by slip or drift. Noncontact feature of the DFIT enables to add-on robots with an arbitrary driving mechanism. This paper presents the design principle of the DFIT and the features of RT component with experimental evaluation.
A Study of Towel Folding by a Robot Arm
Tomoya Oshima,Takashi Yoshimi,Makoto Mizukawa,Yoshinobu Ando 제어로봇시스템학회 2014 제어로봇시스템학회 국제학술대회 논문집 Vol.2014 No.10
In this study, we aim to construct a sequence of towel folding operations by a robot arm. In this paper, we propose the methods for spreading a towel and detecting the grasp positions. For the easy spreading of the towel, we propose how to put the towel on the table. The proposed method lifts one vertex of the towel, and detects the shadow part by using a camera image for recognizing the overlapped condition of the towel. For the folding motion of the towel, we set the vertices of the towel edges as grasping positions. So, we propose the way to detect the vertices of the towel correctly by generating a rectangle which includes all feature points of the towel by using image processing.
Using GPS outdoor autonomous driving system for robot development(ICCAS2008)
Yutaka Erikawa1,Yoshinobu Ando,Makoto Mizukawa 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
In this paper, we suggest that autonomy moves a robot to the destination without we transcribe a map on interface and order an aim point and the course of the robot on the map. By this, an aim point accords at the coordinate in the map, and it is not necessary to show position information for numerical value. When we produce this system, "The navigation of the robot which it used GPS", "A revision for the difference to occur in GPS and the coordinate value of the map." and "Making of the interface to appoint an aim point from map data." are nominated for necessary element technology. By this report, we performed an element experiment about the navigation of the robot which it used GPS for among element technology.