대퇴네갈래근에 테이핑요법 적용이 근력과 근피로에 미치는 영향

최정현,이재갑,안호정,Choi, Jung-Hyun,Lee, Jae-Kap,Ahn, Ho-Jung 대한물리치료과학회 2008 대한물리치료과학회지 Vol.15 No.4

Background: This study examines the changes in muscular strength and muscle fatigue substances when taping treatment is applied in squat exercise and treadmill exercise, in which quadriceps femoris muscles are used frequently so as to clarify the effects of taping as an aid of exercise ability improvement. Methods: 20 healthy male adults in their 20's participated in the study, in which tapes were put on their quadriceps femoris muscles, and various variables as the indicator of muscular strength and muscle fatigue substances were measured by means of the measuring tool before and after exercises. Results: the following conclusion was drawn up: 1. In exercise using muscular strength of the right knee extension, the reduction of muscular strength after exercise of the taping group showed significant statistical difference from that of the non-taping group. 2. In exercise using muscular strength of the lower limbs, the reduction of blood Glaucos after exercise of the taping group showed significant statistical difference from that of the non-taping group. 3. In exercise using muscular strength of the lower limbs, the value of lactic acid after exercise of the taping group showed significant statistical difference from that of the non-taping group. Conclusion: Therefore, the results of this study demonstrate that the application of taping treatment in sports activity or daily life where quadriceps femoris muscles are used a lot can have positive effects on the improvement of muscular strength and relief of muscle fatigue.

천웅(天雄)의 포제에 관하여

최정현,정병하,성만준,권동렬,Choi Jung-Hyun,Jung Byung-Ha,Seong Man-Jun,Kwon Dong-Yeul 대한한의학방제학회 2004 大韓韓醫學方劑學會誌 Vol.12 No.1

Aconiti Root(AR), has been used for about 2000 years, since recorded for low grade in 'Shinnongbonchokyung(Divine Husbandman's Herbal Foundation canon)'. It also recorded for Poisonous Drug in 'Myunguibyullok', 'Yaksungron', etc, and they advised when the AR is using for clinical desease it has to be processed. There are more than 13 processing methods, in records that related 39 parts which is recorded in ancient documents. In China, there are no standard of herb that using for clinical, cause of the traditional processing methods was cut since 1960s. In these days, they are using AR that recorded in Aconiti Tuber part of the processing records, in Guangdong and Shantung. In addition, the modification of Processed Aconiti Root(PAR) is also used for goods in Hongkong, Macao, and Southeast Asia. We studied the PAR for enhancing the importance of it, and multiply using. In this study, we search for the history of processing of AR, traditional theories of processing and clinical adaptation.

부정맥 신호의 조기진단을 위한 연속 심전도 모니터링 기기 개발

최정현,강민호,박준호,권기구,배태욱,박준모,Choi, Junghyeon,Kang, Minho,Park, Junho,Kwon, Keekoo,Bae, Taewuk,Park, Jun-Mo 한국융합신호처리학회 2021 융합신호처리학회 논문지 (JISPS) Vol.22 No.2

With the recent development of IT technology, research and interest in various bio-signal measuring devices are increasing. But studies related to ECG(electrocardiogram), which is one of the most representative bio-signals, particularly arrhythmic signal detection, are incomplete. Since arrhythmia has various causes and has a poor prognosis after onset, preventive treatment through early diagnosis is best. However, the 24-hour Holter electrocardiogram, a tool for diagnosing arrhythmia, has disadvantages in the limitation of use time, difficulty in analyzing motion artifact due to daily life, and the user's real-time alarm function in danger. In this study, an ECG and pulse monitoring device capable of continuous measurement for a long time, a real-time monitoring app, and software for analysis were developed, and the trend of the measured values was confirmed. In future studies, research on derivation of quantitative results of ECG signal measurement analysis is required, and further research on the development of an arrhythmic signal detection algorithm based on this is required. 최근 IT기술이 발달함에 따라 다양한 생체신호 측정 기기에 대한 연구 및 관심이 높아지고 있으나, 가장 대표적인 생체 신호 중 하나인 심전도, 특히 부정맥 신호 검출과 관련한 연구는 미비한 현실이다. 부정맥은 그 발병원인이 다양하며 발병이후 예후가 좋지 않으므로 조기진단을 통한 예방치료가 최선이다. 하지만 부정맥을 진단하기 위한 도구인 24시간 홀터 심전계는 사용지속시간의 제약, 일상생활로 인한 동잡음 분석의 어려움, 위험상황에서 사용자의 실시간 알람 기능에 단점을 보인다. 본 연구에서는 장시간 연속 측정이 가능한 심전도 및 맥박 모니터링 기기와 실시간 모니터링 앱, 분석용 소프트웨어를 개발하였으며, 측정한 값의 경향성을 확인하였다. 향후 연구에서는 심전도 신호 측정 분석의 정량적 결과 도출에 관한 연구가 필요하며, 이를 바탕으로 하는 부정맥 신호 검출 알고리즘 개발과 관련한 추가 연구를 진행해야 한다.

자세 교정훈련을 위한 체위 변환 감지 센서 디바이스의 개발

최정현,박준호,서재용,김수찬,Choi, Jung-Hyeon,Park, Jun-Ho,Seo, Jae-Yong,Kim, Soo-Chan 한국융합신호처리학회 2020 융합신호처리학회 논문지 (JISPS) Vol.21 No.2

최근 학생 및 사무직 종사자에게서 근골격계 질환의 발병률이 증가하고 있으며, 바른 자세의 유지 및 교정 훈련의 필요성이 요구되고 있으나, 관련 연구는 부족한 현실이다. 기존 연구에서는 의자 방석부분에 멤브레인 센서 또는 압력센서를 배치하여 무게의 편중을 보거나, 사용자를 구속하는 센서를 부착하여 체위 변환을 측정하였다. 본 연구에서는 착용편의성을 고려한 체위 변환 감지 센서 디바이스를 개발하였으며, 측정한 각도를 분석앱을 통해 확인하였다. 앉은 자세에서 체위 변환을 측정하기 위하여 경추 및 척추에 IMU 센서로 구성된 센서 디바이스를 부착한다. 두 개의 센서에서 측정되는 체위의 변화값을 각도로 변환하였으며, 각도값은 실시간으로 분석앱을 통해 보여 진다. 본 연구에서는 체위 변화에 따른 실시간 변화값의 측정 가능성과, 착용편의성, 각도 측정의 경향성을 확인해 보았다. 향후 연구에서는 보다 정밀한 각도의 연산 및 동잡음의 보정을 위한 연구를 진행해야 한다. Recently the incidence of musculoskeletal disorders in students and office workers is increasing, and the necessity of maintaining correct posture and corrective training is required, but related research is insufficient. In the previous study, a membrane sensor or a pressure sensor was placed on the seat cushion to see the deviation of the body weight, or a sensor that restrained the user was attached to measure the position change. In this study, a sensor device for detecting a position change in consideration of wearing comfort was developed, and the measured angle was verified through an analysis app. A sensor device consisting of an IMU sensor is attached to the cervical spine and vertebra spine to measure the position transformation in the sitting position. The change value of the position measured by the two sensors was converted into an angle, and the angle value is displayed in real time through the analysis app. In this study, the possibility of measuring the real-time change value according to the change in position, the convenience of wearing, and the tendency of angle measurement were proved. Future research should proceed with more precise angle calculation and correction of motion noise.

Sn-Pb 솔더를 이용한 경연성 인쇄 회로 기판간의 열압착 본딩

최정현,이종근,윤정원,정승부,Choi, Jung-Hyun,Lee, Jong-Gun,Yoon, Jeong-Won,Jung, Seung-Boo 한국마이크로전자및패키징학회 2010 마이크로전자 및 패키징학회지 Vol.17 No.3

본 연구에서는 Sn-Pb 솔더를 이용한 열압착법을 이용하여 경성 인쇄 회로 기판 (rigid printed circuit board, RPCB)과 연성 인쇄 회로 기판 (flexible printed circuit board, FPCB)간 접합 시의 접합 조건을 최적화하는 연구를 진행하였다. 접합의 주요 변수로는 접합 압력, 온도 및 시간이 있으며 이러한 변수의 변화로 인해 접합부의 접합 형태와 박리 강도에서 많은 차이가 발생하는 것을 확인할 수 있었다. 또한 일정 접합 온도와 시간 조건 ($225^{\circ}C$, 7초)에서 22 N/cm의 최고 박리 강도를 보이며 이후로는 더 이상 박리 강도에서 큰 차이를 보이지 않게 되는데, 이를 박리 시험 시의 F-x (forcedisplacement) curve를 토대로 파괴 에너지를 산출하여 그 차이를 규명하였다. 최적의 접합 조건은 $225^{\circ}C$, 7초로 나타났다. In this paper, we focused on the optimization of bonding conditions for the successful thermo-compression bonding of electrodes between the RPCB and FPCB with Sn-Pb solder. The peel strength was proportionally affected by the bonding conditions, such as pressure, temperature, and time. In order to figure out an optimized bonding condition, fracture energies were calculated through F-x (force-displacement) curves in the peel test. The optimum condition for the thermo-compression bonding of electrodes between the RPCB and FPCB was found to be temperature of $225^{\circ}C$ and time of 7 s, and its peel strength was 22 N/cm.

공사중단 방치건축물 정비 제도개선을 위한 실증연구: 충청남도를 중심으로

최정현,임준홍,Choi, Jeonghyeon,Im, Junhong 한국토지주택공사 토지주택연구원 2021 LHI journal of land, housing, and urban affairs Vol.12 No.1

우리나라는 경제성장과 위기, 사업성 부족 등 다양한 이유로 공사중단 방치건축물이 꾸준히 발생하고 있다. 공사중단 방치건축물은 다양한 형태와 규모로 분포하고 있으며 이로 인해 도시경관을 악화, 주거안정성을 저해하고, 화재 ·범죄·악취 등 다양한 도시문제를 야기하고 있다. 정부는 관련법을 제정·시행하고 있지만 시행과정에서 현실과 거리 있는 많은 문제점이 나타나고 있다. 이에, 본 연구는 충청남도 방치건축물을 대상으로 현지 실태조사, 건축관계인 및 이해관계인 심층인터뷰, 정비사업 시행자(LH), 도 및 시군 담당공무원 FGI를 통해 방치건축물 정비사업 추진의 문제점과 개선사항을 실증적으로 도출하였다. 그리고 이를 바탕으로 향후 방치건축물의 예방, 원활한 정비사업 추진을 위한 과제와 실효성 높은 제도개선사항을 제시하였다. South Korea is renowned as one of the countries which have experienced high economic growth in the past years. However since Global Financial Crisis in 2008, its economic growth has remained slow and majority cities have faced various issues in property sector such as declining property price, the increase of uncompleted building sites, abandoned land and disproportionate rate of vacant buildings. These abandoned sites in various scales and locations, particularly nearby residential areas have negative impacts on the urban environment such as crime and vandalism. To tackle these issue, in May 2013, the "Special Act on the Maintenance of Long-Term abandoned Buildings" was enacted and has been put into operation since May 2014. Subsequently, a base maintenance plan was established in 2016 by the Ministry of Land, Infrastructure and Transport. Nevertheless the plan has not been implemented properly due to the limitation of financial and human resources, lack of expertise and ambiguity of laws and guidelines. This study examines the challenges and barriers of the implementation of the Act and recommendations to resolve the urban issues are drawn. This study is a case study of Chungcheongnam-do and the main methods used are in-depth interviews and field surveys with a wide range of stakeholders including the main developer (LH), architects, surveyor and local authority officers. The findings suggest several improvement in the 'Special Act on the maintenance of long-term abandoned buildings'.

움직임 벡터 및 보상 블록의 특성을 이용한 움직임 보상된 차영상 CVQ

최정현,이경환,이법기,정원식,김경규,김덕규,Choi, Jung-Hyun,Lee, Kyeong-Hwan,Lee, Bub-Ki,Cheong, Won-Sik,Kim, Kyoung-Kyoo,Kim, Duk-Gyoo 대한전자공학회 2000 電子工學會論文誌-SP (Signal processing) Vol.37 No.2

본 논문에서는, 움직임 벡터와 보상 블록을 이용한 분류기를 제안하고, 이 분류기로써 MCD(motion compensated difference) 블록을 CVQ(classified vector quantization)하는 새로운 MCDI(motion compensated difference image) 부호화 방법을 제안하였다. MCD 블록의 분산은 움직임 벡터의 크기뿐만 아니라 보상 블록의 분산과도 밀접한 관계가 있으므로, 이 특성들을 이용하여, 새로운 분류기를 제안하였다. 제안한 방법은 서브 코드북(sub-codebook)을 선택하는 분류기에 대한 부가 정보가 필요 없으면서, 모의 실험 결과 분류 비트가 필요한 기존의 방법에 비해 제안한 방법이 좋은 성능을 나타내었다. In this paper, we presents a new MCDI(motion compensated difference image) coding method using CVQ(classifled vector quantization) whoes MCD(motion compensated difference) block is classified by proposed classifier using motion vector and compensated block The variance of MCD block is closely related with the magnitude of motion vector as well as the variance of compensated block, so using this property, we propose a new classifier. This scheme has no side information of the classifier what sub-codebook is selected, and simulation results show that the proposed method exhibits a good performance even when compared with a conventional method that requires classification bits.

생태저류지 LID 시설의 강우유출수 처리비 산정

최정현,이옥정,김상단,Choi, Jeonghyeon,Lee, Okjeong,Kim, Sangdan 한국물환경학회 2017 한국물환경학회지 Vol.33 No.5

Because of the rapid progress of urbanization in recent decades, the proportion of impervious areas in cities has increased. As a result, hydrological properties of urban streams have changed and non-point pollution sources have increased, that have had considerable influence on human life and ecosystems. To manage these situations, application of non-point pollution reduction facilities and LID facilities are expanding recently. In this study, it is investigated if rainfall interception rate used in design of non-point pollution reduction facilities can be applied to design of LID facilities. For this purpose, EPA SWMM is constructed for part of Noksan National Industrial Complex area wherein long-term observed storm water data can be obtained and storm water interception rates for various design capacities of a bio-retention LID facility reservoirs are estimated. While sensitivity of storm water interception rate according to design specifications of bio-retention facility is not large, sensitivity of storm water interception rate according to regional rainfall characteristics is relatively large. As a result of comparing present rainfall interception rate estimation method with the one proposed in this study, the present method is highly likely to overestimate performance of the bio-retention facility. Finally, a new storm water interception rate formula for bio-retention LID facility is proposed.

분포질량 동흡진기가 부착된 연속체 시스템에 대한 연구 (II)

최정현,임병덕,Choi, Jeung-Hyun,Lim, Byoung-Duk 대한기계학회 2004 大韓機械學會論文集A Vol.28 No.3

Large machine and structure can not be normally treated as lumped parameter system. Such machine or structure must be broken down to individual beams or panels the motion of which must be analysed before an absorber system can be designed for each element. The absorber may be a lumped parameter system or a continuous system. One of the most common elements in a machine or structure is the cantilever, and in this paper is considered the design of a continuous parameter absorber to reduce the transverse vibrations of a beam. So this paper describes the method to obtain the accurate information about combined continuous beam system with DVA. This information is obtained from the combined system's receptance. and this paper shows the convenience and useful informations when design the dynamic vibration absorber with the combined system's receptance.

청소년의 인지능력 훈련을 위한 운동-학습 시스템의 개발

최정현,박준호,윤지숙,서재용,박찬홍,Choi, Jung-Hyeon,Park, Jun-Ho,Yoon, Ji-Sook,Seo, Jae-Yong,Pakr, Chan-Hong 한국융합신호처리학회 2020 융합신호처리학회 논문지 (JISPS) Vol.21 No.3

With the importance of creative learning highly valued, the demand for education in early childhood and adolescence has been increasing in recent years, but simple memorization-oriented and classical teaching methods tend not to prove high effectiveness in terms of learner-centeredness. Students who study static at their desks for a long time do not prefer boring classical learning methods, and there is also a lack of educational methods and educational content that conforms to the convergence education trend in the actual educational field. Therefore, this study has created a system that allows students to exercise and learn at the same time through a fun and familiar approach, and implement educational content through activation of brain plasticity. 최근 교육현장 및 가정에서는 창의적 학습의 중요성이 높게 평가되면서 유아 및 청소년기 아동의 교육 수요가 증가하고 있지만, 단순한 암기교육 위주와 고전적인 교육방식은 학습자 중심적 측면에서 효과가 크지 않은 경우가 많다. 오랫동안 책상에 앉아 있는 학생들은 지루한 고전적인 학습방법을 선호하지 않으며, 현재 교육 현장에서도 융합 교육 트렌드에 부응하는 교육 방법 및 교육 콘텐츠가 부족한 것이 현실이다. 따라서 본 연구에서는 학생들이 재미있고 친숙한 접근방법을 통해 운동을 병행하며 학습할 수 있으며, 뇌 가소성(brain plasticity) 활성화를 통해 교육 콘텐츠를 구현할 수 있는 시스템을 만들었다.