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신장훈,Naeun Byeon,Heeju Yu,DaeEun Kim,Byungmun Kang,Dongwoo Kim,이황재,Wan-hee Lee 물리치료재활과학회 2023 Physical therapy rehabilitation science Vol.12 No.1
Objective: This study aims to analyze the effect of regular exercise through the combined walking-oriented aerobic and resistance exercises using EX1 in young adults. Design: Experimental one group pre and post testMethods: Participants comprised17 healthy young adults. All subjects performed a combined exercise program for 10 times using EX1. We measured quadriceps muscle thickness using ultrasound. Additionally, the hand grip strength test, and sit and reach test were performed before and after the exercise. Through paired t-test, we investigated whether there was a statistically significant difference in the measurement results after exercise program. Results: The rectus femoris muscle contraction ratio showed significant difference after exercise(P< 0.01). In the sit and reach test, flexibility showed significant difference after exercise(P< 0.01). The hand grip strength test also showed significant difference after exercise(P< 0.05). Conclusions: Healthy young adults can effectively perform various exercises commonly performed in daily life using EX1.
신장훈,Hye-Kang Park,Joonyoung Jung,Dong-Woo Lee,Hyung Cheol Shin,이황재,Wan-hee Lee 물리치료재활과학회 2022 Physical therapy rehabilitation science Vol.11 No.4
Objective: This study was conducted to analyze the effect of wearable complex muscle support system on energy efficiency during walking in elderly. Design: Cross sectional studyMethods: Twenty healthy elderly participated in this study. All subjects performed a 6 minuteswalk test(6MWT) and stair climbing test in dual, slack and no suit conditions. In each condition, oxygen consumption(VO2), metabolic equivalents(METs), energy expenditure measures(EEm), physiological cost index(PCI), walking velocity and heartrate were measured. Through repeated measured ANOVA, it was investigated whether there was a statistically significant difference in the measurement results between the three conditions. Results: In over-ground walking, VO2, METs and EEm showed significant differences between no suit and slack conditions(p <0.05). In stair climbing, VO2 showed significant difference between slack and dual conditions(p<0.05). Also, METs and EEm showed significant differences between no suit and slack, and between slack and dual conditions(p<0.05). Conclusions: Wearing the wearable complex muscle support system for elderly does not have much benefit in energy metabolism efficiency in over-ground, but there is a benefit in stair walking.
히트펌프 구동 기반 액체식 제습시스템과 기존 액체식 제습시스템의 에너지 소비 분석
신장훈(Shin, Jang-Hoon),박준영(Park, Joon-Young),조민석(Jo, Min-Suk),정재원(Jeong, Jae-Weon) 대한건축학회 2017 大韓建築學會論文集 : 構造系 Vol.33 No.9
Heat pump driven liquid desiccant (HPLD) system, which takes advantage of cooling capacity and heating capacity from evaporator and condenser respectively, have been developed rapidly in recent years. The purpose of this paper is to evaluate energy saving potential of a HPLD system compared to a conventional liquid desiccant (LD) system. R-134a was used for the refrigerant in the heat pump and aqueous solution of lithium chloride was used in the LD system. A simulation based on an empirical model of an absorber was conducted, and total energy consumption in the proposed HPLD system were compared and analyzed with that of the conventional LD system. As a result, the proposed system showed better performance than the conventional liquid desiccant system in the aspect of energy saving. Moreover, HPLD is expected to have a great advantage in terms of compactness from the replacement of the cooling and heating devices in the conventional LD system with a heat pump.
복합 무기체계 설계를 위한 엔지니어링 데이터 관리 프레임워크 개발
김경근,신장훈,한승보,서효원 (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.하계
Defense system is system of systems that is composed of complicated hardware and software. And defense R&D project is performed by regionally dispersed and hierarchically complex organizations. We propose OWS-R process model that is inter-related interaction of organization, task, deliverable and requirement decomposition. OWS-R process is systematic approach that can enable elaborate design process under complicated project environment. OWS-R process is reviewed from the perspective of well-know model based systems engineering, MBSE. And we propose web-based engineering data management framework that realizes OWS-R process model. Project customizing framework by introducing various new concepts for project setup environment is proposed. And we compare various characteristics of proposed framework with well-known commercial system engineering/requirement management tools.
Correlation among triceps surae muscle structure, balance, and gait in persons with stroke
박혜강,유기곤,신장훈,이완희 물리치료재활과학회 2020 Physical therapy rehabilitation science Vol.9 No.3
Objective: This study aimed to compare muscle structure, balance, and gait parameters between healthy adults and persons with stroke and to analyze the correlation among these variables. Design: Cross-sectional study. Methods: Twenty persons with stroke (11 male, 9 female) and twenty healthy participants (9 male, 11 female) were included. Ultrasound images of the triceps surae and the tibialis anterior were acquired in sitting resting, sitting co-contraction, and standing resting positions and also during the functional reach test (FRT) and single leg anterior reaching test (SLART). Muscle thickness and fascicle length were measured. Spatiotemporal parameters of gait were measured using a pressure walkway. Gait speed, cadence, step length, stride length, stance time, and swing time were measured. Results: Changes in percent fascicle length were significantly greater in the gastrocnemius and soleus (SOL) muscles of healthy adults in the sitting co-contraction position (p<0.05). The percent fascicle length of the SOL in FRT and SLART were significantly greater in healthy adults (p<0.05). The mid-stance phase of stroke patients was shorter than healthy adults (p<0.05). A negative correlation was observed between percent fascicle length of the SOL in the sitting co-contraction position and the proportion of the mid-stance phase (p<0.05). Conclusions: The function of the triceps surae is affected in persons with stroke when compared with healthy adults. This can lead to difficulty in performing tasks that involve forward transfer of weight. If the triceps surae is not sufficiently secured, the possibility of compensation in the stance phase increases during gait.
요통 환자의 효과적인 관리를 위한 STarT Back Screening Tool에 대한 체계적 고찰 : 신뢰도 및 타당도와 효과성 중심으로
배영현,권순현,박세훈,박광식,신장훈,심홍선,유승민,이상호,이주연,이주영,이헌규,임호나,조윤희,최성민,허진수,이남이 대한스포츠물리치료학회 2018 정형스포츠물리치료학회지 Vol.14 No.1
The purpose of this study was to analyze on Reliability, Validity and Effectiveness in published the literature regarding STarT Back Screening Tool for low back pain. We investigated by database of Medline, Embase, CINAHL, PsycINFO, AMED, Scopus, PubMed, and Web of Science. The One selected efficacy study of the STarT Back Screening Tool showed significant improvement in disability. And the 20 selected reliability and validity studies of the STarT Back Screening Tool version showed moderate significance, but some low significance in construct validity.