• Proceedings of the Korean Society of Computer Information Conference
• /
• 2015.07a
• /
• pp.230-231
• /
• 2015

본 연구는 영어학습 보조도구로서 3D기법을 활용한 애플리케이션을 개발하는데 그 목적이 있다. 본 연구에서 사용한 애플리케이션은 2D 방식에 기반을 둔 언어학습 보조도구 대신에 휴대가 편리한 스마트폰에 UNITY 3D기법을 적용해서 각 언어음을 발화하는데 조음기관들이 어떻게 서로 상호작용하는지 시각적으로 보여준다. 또한 UNIT을 방향전환하면서 학습자의 음 발성 정확도를 높이는 동시에 학습자 수준에 맞추어 장소에 구애받지 않고 자기 주도적으로 학습의 흥미를 지속적으로 유발시키고자 하는데 그 목적이 있다.

• Journal of Environmental Science International
• /
• v.32 no.4
• /
• pp.233-242
• /
• 2023

The objective of this study was to develop a management strategy for the recovery of carbon storage capacity of abandoned coal mine forest rehabilitation area. For the purpose, the biomass and stand carbon storage over time after the forest rehabilitation by tree type for Betula platyphylla, Pinus densiflora, and Alnus hirsuta trees which are major tree species widely planted for the forest rehabilitation in the abandoned coal mine were calculated, and compared them with general forest. The carbon storage in abandoned coal mine forest rehabilitation areas was lower than that in general forests, and based on tree species, Pinus densiflora stored 48.9%, Alnus hirsuta 41.1%, and Betula platyphylla 27.0%. This low carbon storage is thought to be caused by poor growth because soil chemical properties, such as low TOC and total nitrogen content, in the soil of abandoned coal mine forest rehabilitation areas, were adverse to vegetation growth compared to those in general forests. DBH, stand biomass, and stand carbon storage tended to increase after forest rehabilitation over time, whereas stand density decreased. Stand' biomass and carbon storage increased as DBH and stand density increased, but there was a negative correlation between stand density and DBH. Therefore, after forest rehabilitation, growth status should be monitored, an appropriate growth space for trees should be maintained by thinning and pruning, and the soil chemical properties such as fertilization must be managed. It is expected that the carbon storage capacity the forest rehabilitation area could be restored to a level similar to that of general forests.

• The Journal of Korea Robotics Society
• /
• v.14 no.4
• /
• pp.318-325
• /
• 2019

NREX, an upper limb exoskeleton robot, was developed at the National Rehabilitation Center to assist in the upper limb movements of subjects with weak muscular strength and control ability of the upper limbs, such as those with hemiplegia. For the free movement of the shoulder of the existing NREX, three passive joints were added, which improved its wearability. For the flexion/extension movement and internal/external rotation movement of the shoulder of the robot, the ball lock pin is used to fix or rotate the passive joint. The force and torque between a human and a robot were measured and analyzed in a reaching movement for four targets using a six-axis force/torque sensor for 20 able-bodied subjects. The addition of two passive joints to allow the user to rotate the shoulder can confirm that the average force of the upper limb must be 31.6% less and the torque must be 48.9% less to perform the movement related to the axis of rotation.

• The Journal of Korean Physical Therapy
• /
• v.34 no.5
• /
• pp.198-204
• /
• 2022

Purpose: This paper sought to classify, analyze, and investigate domestic research papers on the physical rehabilitation of children with cerebral palsy, and to suggest a direction for rehabilitation after the coronavirus disease 2019 (COVID-19) pandemic. Methods: A literature search was conducted from June 1 to June 30, 2022, and only papers published in domestic journals during the past 10 years were searched. The main search term was "rehabilitation for children with cerebral palsy", and "rehabilitation" such as "exercise rehabilitation," "equestrian rehabilitation", and "aquatic rehabilitation" were reviewed when they appeared in the titles and abstracts. A total of 18 books were selected according to the exclusion criteria. Results: Rehabilitation by area was divided into exercise rehabilitation, Bobath rehabilitation, equestrian rehabilitation, and aquatic rehabilitation. Analysis was undertaken based on the period of rehabilitation, area wise from 2012 to 2017, except for aquatic rehabilitation, which was studied once in 2020. The intervention effects of exercise rehabilitation were summarized as PICO (Participants, Intervention, Comparison, Outcome), and most of the studies showed improvements in the subject's physical functions. Conclusion: Research on the physical rehabilitation of children with cerebral palsy is being conducted in multiple directions and through several methods. In addition to the Bobath and Vojta approaches, equestrian rehabilitation, aquatic rehabilitation using the buoyancy of water, and computer rehabilitation are conducted. For the physical rehabilitation of children with cerebral palsy in the context of COVID-19, programs that are linked with families and those that incorporate Information Communications Technology (ICT) could be developed.

• The Journal of the Korea Contents Association
• /
• v.7 no.10
• /
• pp.239-249
• /
• 2007

The purpose of this study is to analyse various laws and systems to support IT assistive devices for persons with severe disabilities and draw suggestions for laws and systems on the support of IT assistive devices for the ones in Korea. This study identified the details of laws and systems to provide conveniences for the engagement of the daily life and rehabilitation by persons with severe disabilities in New Freedom Initiative policy of President Bush, the Rehabilitation Assistive Technology Act, the US Disabilities Act and the Assistive Technology Act, and analysed the implementation process therefrom. To increase conveniences and introduce rehabilitation technology for facilitating life conveniences of persons with disabilities, it is necessary to establish the arrangement and application of systems and professional personnel through the demand survey on the need for IT assistive devices of persons with severe disabilities in Korea, the support on the developers of IT assistive device program and hardware, the analysis on the roles of rehabilitation professionals and service experts with respect to the distribution system.

• Journal of the Korean Society of Manufacturing Process Engineers
• /
• v.19 no.7
• /
• pp.41-51
• /
• 2020

This paper presents the development of a robotic system for rehabilitation of the trunk's ability to maintain postural control under different balance conditions. The system, developed with extensive input from rehabilitation and biomedical engineering experts, consists of a seat mounted on a robotic mechanism capable of moving it with four degrees of freedom (3 rotational and 1 translational). The seat surface has built in instrumentation to gauge the movements of the user's center of pressure (COP) and it can be moved either to track the movements of the COP or according to operator given commands. The system allows two types of leg support. A ground mounted footrest allows participation of legs in postural control while a seat connected footrest constrains the leg movement and limits their involvement in postural control. The design evolution over several prototypes is presented and computer aided structural analysis is used to determine the feasibility of the designed components. The system is pilot tested by a stroke patient and is determined to have potential for use as a trunk rehabilitation tool. Future works involve more detailed studies to evaluate the effects of using this system and to determine its efficacy as a rehabilitation tool.

• Journal of the Korean Society for Precision Engineering
• /
• v.33 no.9
• /
• pp.761-768
• /
• 2016

Weight bearing is effective during rehabilitation of gait, in the elderly and disabled people. Various training devices using weight bearing function were developed along with treadmill walking; however, no device has been developed in conjunction to walking on the ground. Here, we designed a rail type frame of a gait rehabilitation system for body-weight support (BWS) function, and analyzed its mechanical safety in the static weight bearing condition of a vertical axis. Computational simulations were performed to analyze structure of the driving parts, which are connected with a rail and driving rollers and the lower plate of the BWS. Structural analyses showed the drivers and BWS were safe, when simulated at 135kg weight under static conditions. Thus, this rail type rehabilitation system can be used for gait training of the elderly and disabled.

• Physical Therapy Rehabilitation Science
• /
• v.6 no.3
• /
• pp.134-139
• /
• 2017

Objective: Dual-task interference is defined as decrements in performance observed when people attempt to perform two tasks concurrently, such as a verbal task and walking. The purpose of this study was to investigate the changes of gait ability according to the dual task interference in chronic stroke survivors. Design: Cross-sectional study. Methods: Ten chronic stroke survivors (9 male, 1 female; mean age, 55.30 years; mini mental state examination, 19.60; onset duration, 56.90 months) recruited from the local community participated in this study. Gait ability (velocity, paretic side step, and stride time and length) under the single- and dual-task conditions at a self-selected comfortable walking speed was measured using the motion analysis system. In the dual task conditions, subjects performed three types of cognitive tasks (controlled oral word association test, auditory clock test, and counting backwards) while walking on the track. Results: For velocity, step and stride length, there was a significant decrease in the dual-task walking condition compared to the single walking condition (p<0.05). In particular, higher reduction of walking ability was observed when applying the counting backward task. Conclusions: Our results revealed that the addition of cognitive tasks while walking may lead to decrements of gait ability in stroke survivors. In particular, the difficulty level was the highest for the calculating task. We believe that these results provide basic information for improvements in gait ability and may be useful in gait training to prevent falls after a stroke incident.

• Journal of Institute of Control, Robotics and Systems
• /
• v.9 no.8
• /
• pp.577-584
• /
• 2003

Traditional ankle rehabilitation procedures are tedious, repetitive, and require therapist's help. Therefore, they do not provide patients with good motivation to actively participate in the rehabilitation exercises. In addition, objective diagnosis and evaluation of the treatment progress have been difficult because records of exercise history are made by passive instruments from time to time. The virtual reality technology can make these procedures more fun so that patients can perform everyday rehabilitation exercises more actively. Moreover, haptics technology can give active resistance to the patients ankle motion to improve strength of muscles as well as can record ankle's motion and force histories for objective diagnosis and evaluation. This paper summarizes development of a virtual environment fur reforming the conventional ankle rehabilitation procedures. First of all, conventional rehabilitation procedures have been summarized. Secondly, haptic design and control, user interface design, virtual environment contents design are described. Lastly, mutual cooperation among many developers including medical doctors and therapists and future works are commented.

• The Journal of Korea Robotics Society
• /
• v.16 no.3
• /
• pp.223-231
• /
• 2021

In this paper describes the research and development of a pipe robot for pipe rehabilitation construction of old water pipes. After the water supply pipe construction, the pipe is leaking, damaged, and aging due to corrosion. Eventually, resistance to the flow of water in lower supply efficiency and contaminated water such as rusty water, finally in various consumer complaints. In order to solve this problem, rehabilitation construction robot technology is required to secure the construction quality of pipe rehabilitation construction and restore the function of the initial construction period. The developed pipe rehabilitation construction robot required a hydraulic actuator for high traction and was equipped with a small hydraulic supply device. In addition, we have developed a hydraulic cylinder and a link system that supports the pipe inner diameter to develop a single pipe robot corresponding to 500 to 800mm pipe diameter. The analysis and experimental verification of the driving performance and unit function of the developed pipe reconstruction robot are explained, and the result of the integrated performance test of the pipe reconstruction robot at the water supply pipe network site is explained.