보행시 전신 주요 관절의 카오스 지수 분석

박정홍(Jung Hong Park),손권(Kwon Son),서국웅(Kuk Woong Seo),박영훈(Young Hoon Park) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

To quantify irregular body motions the time series analysis was applied to the gait study. The motions obtained from gait experiment are complex to exhibit nonlinear behaviors. The purpose of this study is to measure quantitatively the characteristics of the major six joints of the body during walking. The gait experiments were carried out for eighteen young males walking on a motor driven treadmill. Joint motions were captured using eight video cameras, and then three dimensional kinematics of the neck and the upper and lower extremities were computed by KWON 3D motion analysis software. The largest Lyapunov exponent was calculated from the time series to quantify stabilities of each joint. The results provides a data set of nonlinear dynamic characteristics for six joints engaged in normal walking.

의료산업 블록체인 도입을 위한 연구

박정홍(Jung-Hong Park) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.6

본 연구의 목적은 의료산업에 블록체인 기술의 도입을 위한 블록체인 특성을 살펴보기 위함이다. 이를 위해 독립변수인 블록체인 특성은 선행연구를 기반으로 하여 5가지(보안성, 가용성, 신뢰성, 다양성, 경제성)을 사용하였다. 그리고 매개변수와 종속변수는 새로운 기술도입을 위한 수용의도 연구에서 널리 사용되는 기술수용모델(TAM)을 활용하였다. 연구의 목적을 위하여 의료분야에 종사하는 사람을 의료제공자로 구분하고 일반인을 의료소비자로 구분하여 설문조사를 실시하고 상호 비교분석을 실시하였다. 그 결과 전체 응답자, 의료제공자, 의료소비자 모두 가설1-1(보안성-지각된 용이성-수용의도), 가설2-1(보안성-지각된 유용성-수용의도), 가설 3-1(보안성-지각된 용이성-지각된 유용성-수용의도)이 기각됨이 확인되었다. 추가적으로 의료소비자는 블록체인 특성(가용성, 신뢰성, 다양성, 경제성)이 용이성과 유용성을 거쳐 수용의도로 가는 가설3-2에서 가설 3-5 모두 기각되었다. 이를 통해 블록체인의 특성이 지각된 용이성과 지각된유용성을 통해 수용의도로 감에 있어 의료제공자와 의료소비자 간의 차이가 있음을 확인할 수 있었다. 본 연구의 결과는 지금까지 블록체인의 활성화를 위한 연구에서 거의 이루어지지 않은 실증분석을 통하여 활성화 방안을 제시했다는 점에서 의의를 가진다 할 것이다. The purpose of this study was to investigate characteristics of Blockchain to introduce Blockchain technology to the medical industry. Thus, the 5 factors such as Security, Availability, Reliability, Diversity and Economic feasibility were used as the characteristics of Blockchain, which are independent variable, based on precedent studies. Also, Technology Acceptance Model(TAM) that are widely used in the research on Acceptance Intention in order to introduce new technology accept was utilized for intervening variable and dependent variable. For the purpose of this study, the health professionals and ordinary people were classified into health care providers and medical service consumers respectively to conduct survey and comparative analysis. The researching findings discovered that Hypothesis1-1(Security-Perceived Easiness- Acceptance Intention), Hypothesis2-1(Security-Perceived Usefulness-Acceptance Intention) and Hypothesis 3-1(Security-Perceived Easiness-Perceived Usefulness-Acceptance Intention) were rejected in all participants including health professionals and ordinary people. Additionally, all characteristics of Blockchain such as Availability, Reliability, Diversity and Economic feasibility were rejected in Hypothesis3-2 and Hypothesis 3-5 that pass through Easiness and Usefulness to Acceptance Intention, in case of the medical service consumers. Thus, this study discovered and confirmed that there’s difference between the health care providers and medical service in the characteristics of Blockchain, as they pass through Perceived Easiness and Perceived Usefulness to Acceptance Intention. The significance of this study can be found, as it suggested activation plan through empirical analysis, which was hardly ever used in the study on Blockchain activation.

개인의료정보보안인식이 편의성에 미치는 영향

박정홍(Jung-Hong Park) 한국콘텐츠학회 2017 한국콘텐츠학회논문지 Vol.17 No.6

본 연구의 목적은 병원이용 경험이 있는 일반인과 의료종사자 사이의 개인의료정보의 중요성, 개인의료정보 관련 법규, 의료정보시스템에 관한 인식차이와 이를 토대로 병원이용 편의성에 어떠한 영향을 미치는지 알아보기 위함이다. 이를 위해 선행연구 고찰 이후 연구모형을 설정하였고, 일반인 150부, 의료종사자 150부 총 300부의 설문을 회수 후 분석을 실시하였다. 먼저 집단 간의 차이분석에서 일반인과 의료종사자간의 인식의 차이가 있음이 밝혀졌다. 그리고 성별, 연령별, 거주지별 집단 간에도 인식의 차이가 있음을 확인할 수 있었다. 또한 병원이용편의성에 있어서도 의료종사자들은 개인의료정보보안에 대한 인식이 강화되면 병원 이용 편의성이 향상된다는 인식이 일반인에 비해 높은 것으로 밝혀졌다. 가설 검정 결과에서는 개인의료정보의 노출 및 의료정보시스템에 관한 인식이 높을수록 의료기관 활용에 있어서 의사결정 편의성이 높아짐을 확인할 수 있었다. 반면 개인의료정보보안 관련 법규에 관하여는 인식이 높아질수록 병원 이용의 의사결정 편의성과 거래 편의성에 영향을 주지 않음을 확인할 수 있다. 본 연구의 결과는 개인의료정보보안에 대한 인식의 강화는 의료서비스를 제공받고 선택함에 있어서의 의사결정과 거래편의성을 향상시킨다는 것을 실증분석 했다는 것이다. The purpose of the research is that how awareness of importance of personal medical data, laws regarding personal medical data and perception gap regarding information of medical data system may affect usage of hospital convenience between a regular patient who has experienced hospital service and medical professionals. Preceding research analysis was conducted previous on establishing research model; 150 questionnaires to a regular patient and 150 questionnaires for a medical professional, total of 300 questionnaires were gathered for conducting a question investigation. First of all, the research concluded that there are a regular perception differences between a regular patient and medical professional. Moreover, there are perception differences among the different gender, age, and area of residence. Furthermore, medical professionals tend to consider that convenience of hospital usage will be increased if user strengthens recognition of security of personal medical data. Results of hypothesis stress that higher awareness of exposure of personal medical data and medical information system affect decision making convenience for a better usage of hospital. On the other side, awareness of laws related with personal medical information security does not affect decision making convenience of hospital usage and transaction. The results of the research analyzes with proof that strengthening awareness of personal medical data security positively increase convenience of decision making and transactions in selection of provided medical service.

블록체인 특성이 수용의도에 미치는 영향 : 의료분야를 중심으로

박정홍(Jung-Hong Park),김진수(Jinsu Kim) 한국콘텐츠학회 2020 한국콘텐츠학회논문지 Vol.20 No.4

본 연구는 의료기관에 블록체인 시스템을 도입하기 위하여 기술수용모델을 사용하였다. 그리고 외부변수는 선행연구를 통해 5가지(보안성, 가용성, 신뢰성, 다양성, 경제성)를 도출하였다. 그리고 지각된 용이성, 지각된 유용성이 정보신뢰를 통해 수용의도에 가는 경로로 연구모형을 설정하였다. 분석결과 H1의 경우 H1-1(보안성 →지각된 용이성)은 기각되었다. 그리고 이를 제외한 H1-2(가용성 →지각된 용이성), H1-3(신뢰성→지각된 용이성), H1-4(다양성 →지각된 용이성), H1-5(경제성 →지각된 용이성)는 채택되었다. H2는 블록체인 특성 5가지와 지각된 유용성과의 관계 가설로써 모두 채택되었다. H3과 H4를 살펴보면 H3-1인 지각된 용이성이 유용성으로 가는 경로가 유효하지 않았으나 H3-2(지각된 용의성 → 정보신뢰)와 H3-3(유용성 → 정보신뢰), 그리고 H4(정보신뢰→수용의도)는 모두 채택되었다. 본 연구에서는 의료기관에서 블록체인 기술이 도입되기 위해서는 안성을 강화시키는 것도 중요하지만 사용자측면에서 용이성을 높일 수 있는 설계가 필요하다는 것을 확인할 수 있었다. In this study, we explored Technology Acceptance Model(TAM) to introduce Blockchain technology in the medical field. It extracted five external variables(Security, Availability, Reliability, Diversity, Economic feasibility) through previous studies. It set the study model for a path to acceptance intention through the information reliance of recognized easiness and recognized usefulness. As results of empirical analysis, H1-1(Security →Perceived Easiness) was rejected. H1-2(Availability→Perceived Easiness), H1-3(Reliabilit→Perceived Easiness), H1-4(Diversity →Perceived Easiness), H1-5(Economic →Perceived Easiness) were adopted. Hypothesis 2 was a relations between Blockchain’s characteristics and Perceived usefulness, all the Hypothesis were adopted. Hypothesis 3 and Hypothesis 4 indicated that H3-1(Perceived Easiness →Perceived usefulness) was rejected but H3-2(Perceived Easiness → information reliability), H3-3(Perceived usefulness → information reliability), and H4(information reliability→acceptance intention) were all adopted. It was confirmed that it is important to emphasize the importance of stability to introduce block chain technology to medical centers, but it was necessary to use a design that can increase the easiness from the prospect of users.

외발서기 시 시각정보 차단에 따른 인체 균형 특성 변화 분석

박정홍(Jung Hong Park),김광훈(Gwang Hoon Kim),염창홍(Chang Hong Youm),손권(Kwon Son) Korean Society for Precision Engineering 2011 한국정밀공학회지 Vol.28 No.11

바지선 구조변경이 계류력 변화와 안정성에 미치는 영향

박정홍(Jung-Hong Park),김광훈(Kwang-Hoon Kim),문병영(Byung-Young Moon),장택수(Tak-Soo Jang) 한국유체기계학회 2011 한국유체기계학회 논문집 Vol.14 No.5

복잡계의 세포자동화법을 이용한 뼈의 적응적 재구축에 관한 연구

문병영,박정홍,손권,Moon, Byung-Young,Park, Jung-Hong,Son, Kwon 대한기계학회 2003 大韓機械學會論文集A Vol.27 No.7

An adaptive bone remodeling is simulated by using the cellular automata (CA) method. It is assumed that bone tissue consist of bone marrow, osteoclast, osteoblast cell or osteoprogenitor cell. Two types of local rule are adopted; those are the metabolism rule and adaptive bone formation rule. The metabolism rule is based on the interactions of cells and the bone formation rule is based on the adaptation against the mechanical stimulus. The history of load and memory of mechanical stimulus are also considered in the local rules. As a result, the pattern of distribution of the bone tissue is dynamically adequate and it is similar to intact cancellous bone.

보행에서 남성과 여성에 대한 주요 관절 운동의 통계학적 분석

김민경(Min Kyoung Kim),박정홍(Jung Hong Park),손권(Kwon Son),서국웅(Kuk Woong Seo) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5

Statistical differences between men and women are investigated for a total of eleven joint motions during level walking. Human locomotion which exhibits nonlinear dynamical behaviors is quantified by the chaos analysis. Time series of joint motions was obtained from gait experiments with ten young males and ten young females. Body motions were captured using eight video cameras, and the corresponding angular displacements of the neck and the upper body and lower extremity were computed by motion analysis software. The maximal Lyapunov exponents for eleven joints were calculated from attractors constructed and then were analyzed statistically by one-way ANOVA test to find any difference between the genders. This study shows that sexual differences in joint motions were statistically significant at the shoulder, knee and hip joints.

모바일 하버 컨테이너 적재 유도 시스템에서 롤러 가이드 적용 및 해석

오태오(Tae-Oh Oh),박정홍(Jung-Hong Park),김광훈(Kwang-Hoon Kim),손권(Kwon Son) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.9

The purpose of this study is to evaluate a simulation model of a stacking guidance system (SGS) with a roller guide applicable to the mobile harbor. The study used a small-scale model (1/20) made of wood with rollers in order to compare the dynamic analysis with experiment results. The law of similarity was applied for the validation of the scaled model. In order to construct a more realistic simulation model, the damping coefficient of the dynamic model was adjusted to 0.5 Ns/㎜ for the wood-to-wood contact condition based on the experimental results. Using this validated model, dynamic simulations were also carried out for containers of 20, 30, and 40 tons. The results showed that the reaction force of the roller guide was increased from 74.7 kN to 91.2 kN as the weight of container increased. For the design of a roller guide for SGS, the results obtained in this study can be used to reduce the reaction force by employing a rubber roller or a highly damped rotational joint.

복잡계를 응용한 인체 골절치료 모델링과 해석에 관한 연구

문병영(Byung Young Moon),박정홍(Jung Hong Park) Korean Society for Precision Engineering 2003 한국정밀공학회지 Vol.20 No.12