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가쪽쏠림보행을 동반한 외측 연수경색 환자의 두침요법을 병행한 한의치료: 증례보고
현재철 ( Jae-cheol Hyun ),정수현 ( Su-hyeon Jeong ) 한방재활의학과학회 2021 한방재활의학과학회지 Vol.31 No.4
The aim of this study was to report the effect of Korean medicine treatment with scalp acupuncture of patient with lateropulsion, dizziness, headache caused by lateral medullary infarction. We treated the patient with scalp acupuncture, acupuncture, herbal medicine. Numeric rating scale (NRS), Korean version of berg balance scale (K-BBS), gait balance evaluation, dizziness handicap inventory (DHI), activities-specific balance confidence scale (ABC) and vestibular disorders activities of daily living scale (VADL) were used to evaluate symptoms. NRS of Lateropulsion, dizziness, headache were decreased. K-BBS score increased from 4 to 56, and in the gait balance evaluation, it returned to normal. DHI, VADL score were decreased and ABC score increased from 0 to 1,300. This case report shows that Korean medicine treatment with scalp acupuncture can be effective in lateral medullary infarction. However, further controlled studies are needed to confirm the effect of scalp acupuncture on such patients. (J Korean Med Rehabil 2021;31(4):193-201)
과립식 피내침 치료로 호전된 경추 관절가동범위 제한을 동반한 급성 경항통: 증례보고
현재철 ( Jae-cheol Hyun ),정수현 ( Su-hyeon Jeong ) 경락경혈학회 2021 Korean Journal of Acupuncture Vol.38 No.3
We report on 4 patients suffering from acute neck pain and limited range of motion (ROM) in the cervical spine who were treated with intradermal acupuncture. The treatment effect was evaluated with numeric rating scale (NRS), ROM, and Neck Disability Index (NDI). After treatment, the NRS and NDI scores decreased and the ROM of the cervical spine increased in all patients. This report shows that intradermal acupuncture treatment can be effective for patients with acute neck pain with limited ROM. However, further controlled studies are needed to confirm the effect of intradermal acupuncture on such patients.
현재철(Jae-Cheol Hyun),정수현(Su-Hyeon Jeong) 척추신경추나의학회 2019 척추신경추나의학회지 Vol.14 No.2
Objectives : The purpose of this study was to assess the use of Korean medicine for treating radial nerve palsy. Methods : We searched for studies on the use of Korean medicine for the treatment of radial nerve palsy in 7 electronic databases and analyzed these studies. Results : We found 95 studies on radial nerve palsy from 7 electronic databases. We excluded 77 duplicate studies, 1 review article and 2 studies published before 2000. As a result, 15 case studies(36 patients) were included. Acupuncture(15 times), electroacupuncture(6 times), pharmacopuncture(9 times), herbal medicine(11 times), physical therapy(10 times), moxibustion(3 times), cupping therapy(1 time), chuna manual therapy(1 time) and yinyang balancing appliance(1 time) were used. LI11 for acupuncture, LI4, LI11 for electroacupuncture, bee venom as pharmacopuncture material and LI4, LI10, LI11 in pharmacopuncture point, Boik-tang gami as herbal medicine, hot pack for physical therapy, LI4, LI11 for moxibustion were the most frequently used. Conclusions : Korean medicine treatment for radial nerve palsy has been performed in various ways. However, we found limited evidence regarding Korean medicine for radial nerve palsy. Thus, we think various types of studies including more case reports, for radial nerve palsy should be performed in the future.
Augumented Jacobian 과 Potential Field 를 활용한 산업용 6 축 로봇의 장애물 회피 연구
류현재,김재형,이진혁,이민철 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6
In industrial robots, collision avoidance and smooth path planning are essential issues directly related to productivity. It is important to maintain a posture in moving objects such as water. In this paper, an asymmetric S-curve profile with a modified potential field has been proposed, which generates a smooth trajectory to avoid the static obstacle. An asymmetric S-curve Profile reduces the overshoot and residual vibration by choosing the jerk ratio larger than one. A damped least square is used for singularity avoidance of the 6-axis robot, and an augmented Jacobian is used with wrist parts added to the end-effector for a fixed pose. We experiment with MATLAB(R2020a) simulations and applications to the real-world model NEUROMEKA indy7. The results demonstrate that the proposed method can avoid smooth paths while maintaining posture.
Oscillating Water Column (OWC) Wave Energy Converter Part 1: Fixed OWC
양현재,정현철,구원철 한국해양공학회 2022 韓國海洋工學會誌 Vol.36 No.4
This study reviews the recent development and research results of a fixed oscillating water column (OWC) wave energy converter (WEC). The OWC WEC can be divided into fixed and floating types based on the installation location and movement of the structure. In this article, the study on a stationary OWC WEC, which is close to commercialization through the accumulation of long-term research achievements, is divided into five research categories with a focus on primary energy conversion research. These research categories include potential-flow-based numerical analysis, wave tank experiments, computational fluid dynamics analyses toward investigation of fluid viscous effects, U-shaped OWC studies that can amplify water surface displacement in the OWC chamber, and studies on OWC prototypes that have been installed and operated in real sea environments. This review will provide an overview of recent research on the stationary OWC WEC and basic information for further detailed studies on the OWC.
산업용 로봇암의 잔류진동 저감을 위한 포텐셜 필드 기반 충돌 회피 궤적 계획
류현재(Hyeon-Jae Ryu),김재형(Jae-Hyung Kim),이민철(Min-Cheol Lee) 제어로봇시스템학회 2022 제어·로봇·시스템학회 논문지 Vol.28 No.1
In industrial robots, preventing collisions with obstacles and creating smooth trajectories are critical issues. In previous research, an S-curve profile has been studied to reduce jerk. Many potential field method approaches have been researched to avoid collisions with obstacles in mobile robots. Typical potential fields generate a repulsive force for a robot to avoid obstacles inside the assumed boundary near the obstacle, but this repulsive force can affect robot motion that is above the maximum velocity because the repulsive force adds to the attractive force after avoiding an obstacle if the attractive and repulsive forces are in the same direction. This paper presents an asymmetric S-curve profile with a modified potential field, which generates a smooth velocity trajectory while avoiding the static obstacle and being over maximum velocity, as well as reducing residual vibration. The 6-axis robot uses a damped least square for singularity avoidance, and an augmented Jacobian is used with wrist parts added to the end-effector for a fixed pose. Simulations were conducted on MATLAB. We applied the simulation results to the NEUROMEKA INDY7 (6-axis) robot. According to the results, the proposed method produces a smoother trajectory than existing methods.