전자의무기록 데이터 분석 접근법

한창호 ( Changho Han ),박찬민 ( Chan Min Park ),김유정 ( Yujeong Kim ),강소라 ( Sora Kang ),박태준 ( Tae Jun Park ),윤덕용 ( Dukyong Yoon ) 한국보건정보통계학회 2022 보건정보통계학회지 Vol.47 No.5

As the healthcare environment is being digitalized and changed rapidly, research using medical big data is increasing. One of the most applicable data is electronic medical records which can provide a large amount of clinically practical meaning. Electronic medical data include patient’s demographic information, laboratory test results, imaging and biosignal data. In this article, we provide support for a wide variety of researchers in their efforts to use electronic medical record data accurately and usefully in their work. From the basic concept of the research using electronic medical records to challenging aspects like data integration between multiple institutions are described. Also, examples of each type of data are covered; structured such as numeric data and unstructured such as images, biosignals and narrative text. Using these kinds of electronic medical records, analyses are processed by data cleansing, transforming, and reducing in order. Many kinds of variables such as the exposure and outcome of interest, covariate and the research design can be chosen during the preprocessing. As many machine-learning-based studies as well as epidemiologic-based studies have been conducted using electronic medical records, various research frameworks have been proposed. However, data quality management and data standardization for multi-center data analysis are still remaining as challenging tasks.

모션캡쳐 시스템에서 3차원 데이터 획득의 정확도 개선을 위한 연구

한창호(Changho Han),서평원(Pyoungwon Seo),김순철(Soonchul Kim),유영기(Youngkee Ryu),오춘석(Choonsuk Oh) 한국정보과학회 2008 한국정보과학회 학술발표논문집 Vol.35 No.1

기존 논문에서 CCD 카메라를 이용해 3차원 데이터를 획득하는 시스템을 소개했었다. 하지만, 정확도에서는 기존에 개발한 다른 PSD카메라를 이용한 시스템과 큰 차이를 보이지 않았다. 본 논문에서는 정확도를 개선하기 위한 여러 가지 실험을 했으며, 결과를 통해 상당히 향상되었음을 알 수 있다. 제안된 방법은 왜곡제거, z축 보정 등이며, 각 방법의 비교실험을 통해 얼마나 개선되었는지 살펴본다.

외환위기와 NAFTA 이후 멕시코 금융산업

한창호(Changho Han),강임호(Imho Kang) 한국라틴아메리카학회 2007 라틴아메리카연구 Vol.20 No.1

This paper argues that the financial intermediation of Mexican financial industry declined after the foreign currency crisis and NAFTA in 1994, though the industry has been rapidly integrated into international capital market since then, using the data of national competitiveness produced by International Institute for Management Development in Swiss. The following four facts support the argument. First, the country risk of Mexico has decreased significantly since 1994, which means that the fund raising cost from international capital market dropped down. Second, it became easier for foreign firms to get access to the domestic capital market, and for domestic firms to the international capital market. Third, the credit to domestic firms, investment of venture capital, financial support to export companies decreased, and the stock market has become less dynamic. Fourth, the financial service to average consumers and the financial regulation has become less efficient. In summary, though Mexican financial industry of 2006 is regarded higher than that before 1994 from international point of view, it has not yet recovered the past competitiveness.

디자인메가트렌드 통합예측을 위한 트렌드 정보 리서치 및 활용 방법 연구

한창호(Han, Changho),조현주(Cho, Hyunjoo) 한국디자인지식학회 2012 디자인지식저널 Vol.23 No.-

빠르게 시시각각 변하는 시대의 국내 중소기업 디자인들은 글로벌 디자인 경쟁력을 갖추기 위해 글로벌 이슈를 인식하고 있어야 하며 어떤 이슈들이 그들의 사업에 영향을 줄 것인지 미리 알고 있어야만 한다. 본 연구는 이러한 디자이너들의 글로벌 트렌드 정보 활용 니즈를 충족시키기 위해 문헌조사를 통해 디자인메가트렌드 정보 활용 니즈를 충족시키기 위해 문헌조사를 통해 디자인메가트렌드를 정의하고 그 속성 및 리서치 방법을 연구하였다. 이를 바탕으로 트렌드 정보 예측 체계를 리서치 대상 선정→트렌드 정보 추출→ 트렌드 정보 관계성 확립의 3단계로 구축하였고 그 결과로 10가지 디자인메가트렌드 클러스터를 웹기반의 총체적 트렌드 정보 예측 플랫폼인 트렌드 생태계 시스템에 적용하여 디자인메가트렌드의 메인 카테고리로 제안하였다. 이 논문은 사회동향과 디자인트렌드 정보를 총체적으로 조망 이해, 예측할 수 있는 실질적인 방법을 웹기반의 트렌드 정보 예측 플랫폼으로 제시함으로써 궁극적으로 디자이너가 제품 혹은 서비스의 기획 및 디자인단계에서 효과적으로 트렌드 정보를 활용할 수 있도록 하는 것을 목적으로 한다. 또한 웹기반의 트렌드 정보 예측 플랫폼은 2011 디자인기술개발사업의 ‘디자인메가트렌드 통합 예측 모델 개발’ 과제의 최종 결과물로서 역할을 한다. To prepare for global design competition in this rapidly changing world, designers of smaller companies in Korea should know what the global issues are and how those issues will influence their companies. This research focused on satisfying the needs of using global trend information and studied about the definition, property and researching methods of design trend through the literature research. Based on this study, three steps for trend information forecasting are established: Choosing the researching object → Abstracting the trend information → Establishing the relationship of trend information. As a result, 10 design mega trend clusters are elicited. In addition, the design mega trend cluster is suggested as a main category of design mega trend by applying the elicited design mega trend cluster to the trend eco-system, which is a web-based platform to predict design trend information. This report aims on helping designers to use the trend information effectively when they design the product or service by offering the ‘web-based trend information predicting platform’ for watching, understanding and forecasting the social trend and design trend information generally, In addition, this web based trend information prediction platform serves as the final deliverable of Design Mega Trend Integrated Forecasting Model Development of 2011 Design-Based Development Project.

3차원 체인코드와 은닉마르코프 모델을 이용한 권투모션 인식

한창호(Changho Han),오춘석(Choonsuk Oh),최병욱(Byung-Wook Choi) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.8

In this paper, a new method to recognize various motions of fighting with an aid of HMM is proposed. There are four kinds of fighting motion such as hook, jab, uppercut, and straight as the fighting motion. The motion graph is generalized to define each motion in motion data and the new 3D-chain code is used to convert motion data to motion graphs. The recognition experiment has been performed with HMM algorithm on motion graphs. The motion data is captured by a motion capture system developed in this study and by five actors. Experimental results are given with relatively high recognition rate of at least 85%.

플러스에너지빌딩 달성을 위한 통합공조기 운전 최적화에 관한 연구

한창호(Changho Han),김진영(Wonhee Cho),조원희(Wonhee Cho),허준영(Juneyeong Heo),김용찬(Yongchan Kim) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.4

서울시 복지시설의 공간환경 유니버설디자인을 위한 평가지표 개발

한창호 ( Changho Han ) 커뮤니케이션디자인학회 2015 커뮤니케이션 디자인학연구 Vol.53 No.-

본 논문은 복지시설 이용자의 신체적, 정서적 특성을 반영한 유니버설디자인 평가지표 및 평가를 위한체크리스트를 개발하여 향후 서울시 및 공공복지시설 유니버설디자인 인증 실현을 위한 기반 연구이다. 서울시 노인, 장애인, 아동/청소년/여성시설에 적용할 수 있는 공간환경 유니버설디자인 평가지표 및 평가체크리스트의 개발을 위해 유니버설디자인 원칙 및동향을 파악하고, 복지시설 이용자 특성 구분에 의한시설 영역 및 공간 구분을 하였다. 유니버설디자인 평가지표 개발의 방향 및 요건을 취합하기 위해 전문가 그룹을 통한 어피니티 분석을 도입하여 복지시설 환경 유니버설디자인 속성을 도출하고, 가중치가 반영된 공간환경 유니버설디자인 평가지표 및 체크리스트를 개발하였으며, 체크리스트의 효용성을 검증하기 위하여 환경디자인, 복지서비스 전문가를 대상으로 공간환경 유니버설디자인 모의 평가 및 결과를 도출하였다. 본평가지표 및 체크리스트는 복지시설 영역별 총체적 평가는 물론, 디자인 부문별 비교 평가가 가능한 자료로 활용할 수 있을 것이다. In this paper, the physical facilities of welfare users, develop a checklist for universal design evaluation and assessment indicators of Seoul-based research and public welfare facilities for the realization of Universal Design certification. Seoul elderly, the disabled, children / youth / women facility space environment that can be applied to the universal design evaluation indices and evaluation checklist. To assemble the direction and requirements of universal design evaluation indices were introduced for affinity analysis developed by the Expert Group. Environment and welfare facilities derive a universal design attributes, I developed the space environment, universal design evaluation indicators and checklists. Check to verify the effectiveness of the list of environmental design, space intended for welfare services professionals derive a simulated environment, universal design was evaluated and results. The evaluation index and the checklist welfare facilities area by overall assessment is there will be a comparative evaluation design sector to take advantage of available resources.

고전검사이론(Classical Test Theory)의 C코드 구현방법 연구

한창호(Changho Han) 한국인간과자연학회 2024 인간과자연 Vol.5 No.1

The purpose of this paper is to implement classical test theory (CTT) as C code to obtain statistical analysis, item difficulty, and item discrimination used for the item analysis, and to verify the performance by comparing it with the existing commercial TestAn program. Test theory for item evaluation is divided into CTT and item response theory (IRT). Recently, the IRT has been widely used, but CTT is also used as an item analysis theory along with IRT. In this paper, CTT was directly implemented as C code, compared and analyzed the difference between the results calculated using the actual examinee’s answer sheet and the commercial program for the accuracy of the program calculation result. The formula for CTT was implemented as C language code, and the code was presented so that it could be changed and utilized in various platforms such as Android, Linux, dotNet, etc. Therefore, it is expected that it will be highly utilized in the industrial field that builds an evaluation system.

태양열 보조 원수열원 히트펌프의 운전특성 분석

한창호(Changho Han),김진영(Jinyoung Kim),조원희(Wonhee Cho),김용찬(Yongchan Kim) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.6

디스플레이 검사 장비를 위한 OPC Client 개발

한창호(Changho Han),오춘석(Choonsuk Oh),유영기(Youngkee Ryu) 제어로봇시스템학회 2008 제어·로봇·시스템학회 논문지 Vol.14 No.5

OPC is the preferred communication standard for sharing process control data at all levels of the enterprise and becomes the global standard, sends/receives the data with PLC programs of inspection system via network, and manages various data using OPC server. In this paper, we introduce the developed OPC client system for FPD inspection system with OPC server. To control inspection system through OPC server, we have developed libraries which consist of stage driver, switch driver, microscope driver, image processing, alignment, and task management modules. Also we have developed the test program to verify all functions precisely. We describe the mechanism of inspection system, OPC connection method, and programs.