• The Journal of Information Technology and Database
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• v.5 no.1
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• pp.69-84
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• 1998

본 연구는 정보화 투자효과 평가방법론의 틀을 형성하는 투자효과 분류체계와 측정활동의 모형을 제안하고 있다. 우선 기존에 사용되는 여러 가지 이론적 또는 실무적 투자효과 분류체계의 장단점을 분석한 후 Balanced Scorecard 모형에 의거하여 정보화 투자효과를 재무, 대고객, 내부 프로세스, 혁신과 학습 4가지 영역으로 분류하였다. 이러한 분류체계는 1990년대 정보화 투자가 창출하는 무형적이고 전략적인 효과를 비즈니스 용어와 성과지표로서 적절하게 수용하고 있고, 정보화 투자를 비즈니스 투자와 사업적 관점에서 바라볼 수 있게 한다. 그리고 정보화 투자와 기업성과 사이의 인과관계와 역동적 흐름을 체계적으로 파악할 수 있게 하는 장점이 있다. 이러한 분류체계에 근거하여 투자효과 측정활동은 기업성과지표의 도출, 기업성과지표별 정보화 효과 예측, 그리고 정보화 효과의 화폐가치 산출이라는 3가지 작업으로 구분된다. 본 연구에서는 각 작업별로 어떠한 절차, 방법, 기법들이 사용될 수 있는지를 제안하고 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06c
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• pp.320-322
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• 2012

코 내부의 복잡한 기하학적 형상으로 인해 nasal airway의 분리는 많은 어려움을 겪고 있다. 본 논문은 velocimetry of nasal airflow 와 코 수술 계획을 위하여 3차원 공간에서 nasal airway를 interactive semiautomatic으로 분리하고 시각화하는 방법을 제안한다. 제안하는 방법은 ROI(Region-Of-Interest)와 multi-seed 3d region growing(MS3RG)기법을 적용하여 비강을 분리하며 볼륨렌더링 기법을 이용하여 분리된 영역을 3차원 공간에서 직관적으로 확인 할 수 있다. 또한 분리된 3차원 비강 모델은 유동흐름 실험을 위하여 3차원 프린터를 통해 실제 모형으로 제작 가능하다. 그리하여 CT dataset(512*512*175)을 가지고 매뉴얼 세그멘테이션에서 5시간 정도 걸리던 작업을 반자동 세그멘테이션 방법을 이용할 경우 최대 3분 이내에 분리 작업을 완료할 수 있으며 수치해석 실험 및 물리 실험에 이용할 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.04a
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• pp.936-938
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• 2014

폐쇄회로 TV는 우리의 생활에 밀접하게 접근할 수 있는 수준에 다다르게 되었다. 따라서 중요한 작업은 영상에서 우리가 원하는 개체를 검출해내는 것이라 할 수 있다. 그 중에서 사람의 모습을 촬영해서 사람의 특징을 추출하는 연구가 많이 진행되었고 이를 이용해서 실제 CCTV 영상을 토대로 개체를 검출해내는 시스템에 대해 고찰하였다. 여러 가지 개체 검출 알고리즘 중에서 오픈소스로 제공이 되며, 다중 개체를 검출하기 위해서 Haar-like feature를 이용한 개체 추출 알고리즘을 이용하여 CCTV 다중대체 검출에 대해 실험을 진행하였다. 정지영상에서는 정면을 응시하는 얼굴영역 검출에서는 높은 성능을 보이며 다른 각도에서는 차이가 있지만 무난한 성능을 보이지만 실시간에서는 보정 작업이 필요하게 되었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.550-552
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• 2022

A video wall controller has a special type of multi-monitor that displays multiple monitors on a single large screen by arranging them consecutively. Operator maps and stores the video and monitor in advance. In a small system the mapping task of videos and monitors is simple. But as the number of monitors increases, the number of mapping cases increases, and thus work efficiency decreases. In this paper, we propose a association rule-based recommender system which help improve the efficiency of mapping task.

• Proceedings of the Korea Information Processing Society Conference
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• 2024.05a
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• pp.586-589
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• 2024

본 실험 연구에서는 주의 메커니즘과 컨볼루션 신경망을 결합하여 모델을 개선하는 방법을 탐색하는 딥 러닝 기술을 소개한다. 이 기술은 지도 학습 방식을 위해 공개 데이터 세트의 쓰레기 분류 데이터를 사용하고, Grad-CAM 기술과 채널 주의 메커니즘 SE 를 적용하여 모델의 분류 의사 결정 과정을 더 잘 이해하기 위해 히트 맵을 생성한다. Grad-CAM 기술을 사용하여 히트 맵을 생성하면 분류 중에 모델이 집중하는 영역을 시각화할 수 있다. 이는 모델의 분류 결정을 설명하는 방법을 제공하여 다양한 이미지 카테고리에 대한 모델 결정의 기초를 더 잘 이해할 수 있다. 실험 결과는 전통적인 합성곱 신경망과 비교하여 제안한 방법이 쓰레기 분류 작업에서 더나은 성능을 달성한다는 것을 보여준다. 주의 메커니즘과 히트맵 해석을 결합함으로써 우리 모델은분류 정확도를 향상시킬 수 있다. 이는 실제 응용 분야의 이미지 분류 작업에 큰 의미가 있으며 해석 가능성에 대한 딥 러닝 연구 진행을 촉진하는 데 도움이 된다.

• The Journal of Korean society of community based occupational therapy
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• v.3 no.2
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• pp.85-95
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• 2013

Objective : The purpose of this study was to know the degree of the perceptions and the needs regarding the driving rehabilitation of students of occupational therapy. Method : Subjects are 317 students, department of occupational therapy of 4 colleges in Gyeongnam and Busan. Questionnaire consist of 15 questions of perceptions of the driving rehabilitation, 9 questions of needs of the driving rehabilitation, and 4 questions of subjects. The period of surveys was from 12, May to 12, Jun, 2013. Result : 73(23.1%) students answered that they knew about the driving rehabilitation and 47(14.8%) students answered that they experienced the driving rehabilitation. The answers about the channels of knowing and experience regarding driving rehabilitation had 'through the college'. The perceptions regarding the specialist and programs of driving rehabilitation was low compared with the knowing of the driving rehabilitation. The perception of needs regarding the driving rehabilitation for people with disabilities was high and they answered that they need the educations regarding driving rehabilitation. The 3rd grade students had high degree of perceptions and needs compared with 1st and 2ed grade students. And A college students had high degree of perceptions and needs compared with C and D college students. Conclusion : It is important that subject regarding of the driving rehabilitation include in curriculum of occupational therapy for strengthen the role of the occupational therapist in the driving rehabilitation.

• Journal of Korean Society of Transportation
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• v.35 no.6
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• pp.545-556
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• 2017

Various assessment indexes have been developed and utilized to evaluate the driver workload. However, existing workload assessment indexes do not fully reflect driving habits and driving patterns of individual drivers. In addition, there exists significant differences in the amount of workload experienced by a driver and the ability to overcome the driver's workload. To overcome these limitations associated with existing indexes, this study has developed a novel workload assessment index to reflect an individual driver's driving pattern. An average of the absolute values of the steering velocity for each driver are set as a threshold value in order to reflect the driving patterns of individual drivers. Further, the sum of the areas of the steering velocities exceeding the threshold value, which is defined as erratic steering area (ESA) in this study, was quantified. The developed ESA index is applied in evaluating the driver workload of manually driven vehicles in automated vehicle platooning environments. Driving simulation experiments are conducted to collect drivers' responsive behavior data which are used for exploring the relationship between the NASA-TLX score and the ESA by the correlation analysis. As a result, ESA is found to have the greatest correlation with the NASA-TLX score among the various driver workload evaluation indexes in the lane change scenario, confirming the usefulness of ESA.

• Clean Technology
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• v.20 no.2
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• pp.171-178
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• 2014

In this study we have examined the health risk factors and analyzing data of laborers working at the welding operation at large-sized casting process. In order to improve the working environment of workplace, an effective ventilation method was proposed after performing CFD (computational fluid dynamics) modeling and measurement of pollutants. As a result of examining the health risk factors of workers, oxidized steel dust is the main pollution source in the company A, welding fume in the companies B and C, and welding fume and oxidized steel dust in the company D. The fume concentration in the workers' breathing zone was $0.05{\sim}4.37mg/m^3$, and the fume concentration in the indoor air at the welding process was $0.13{\sim}7.54mg/m^3$. From a result of CFD, a local exhaust with an exhaust duct adjacent to welding point was found to be most effective in case of the exhaust process. In case of air supply, we found that a desired location of air supply fan would be at the end of the opening. If a standardizing the ventilation system for tunnel-type semi-enclosed space at a large-sized casting process is introduced in welding work places in the future, it would be more effective to protect the health of welding workers working at the casting industry and shipbuilding industry and improve the work environment.

• The Journal of Korean Academy of Sensory Integration
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• v.20 no.3
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• pp.72-85
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• 2022

Objective : This study was conducted to examine self-selected goals and the outcome measures used in the Cognitive Orientation to daily Occupational Performance (CO-OP) approach for Developmental Coordination Disorder. Methods : Studies published from January 2012 to October 2022 in the PubMed, Embase, ScienceDirect, Cochrance Library databases were searched. Keywords used for search were ('developmental coordination disorder' OR 'DCD') AND ('Cognitive Orientation to daily Occupational Performance' OR 'Cognitive Orientation to Occupational Performance' OR 'CO-OP'). Among 211 searched studies, 7 selected studies that match the thesis of this study were analyzed. Results : The selected studies showed a relatively high level of evidence overall, including two randomized experimental studies, one non-random two-group study, three non-random one-group studies, one single-subject study. The self-selected goals preference of the children was high in the order of play, education, and daily life activities. Most of applicable sessions were conducted 10 times during a 1-h period, and intervention effects showed positive outcomes on the occupation performance motor domain. To measure the effectiveness of CO-OP, the improvement of occupational performance was evaluated using Canadian Occupational Performance Measure (COPM) and Performance Quality Rating Scale (PQRS), and the improvement of motor skills was evaluated using Movement Assessment Battery for Children (M-ABC). Conclusion : This study is expected to be used as basic clinical data when applying the CO-OP approach to Developmental Coordination Disorder.

• 한국노년학
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• v.37 no.2
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• pp.461-474
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• 2017

The purpose of this study was to develop the caregiver guideline for participation in activities daily living for the elderly with early dementia in home including easily adaptable and professional strategies as early intervetion. The process of this study was 3 stage. First stage, the development of preliminary caregiver guideline as the first stage of this study was to translate to Korean and reclassify the items about caregiver guideline for participation from reports of foreign association or government related dementia, and it consisted of 3 areas, 128 statements for questionnaire for Delphi investigation. Second stage, the guideline was to conduct the content validity, and delete, reclassify, integrate, revise inappropriate items through 2 rounds and 16 Delphi panels. Third stage, the establishment of the final version of caregiver guideline. It consisted of 8 areas: home modification and assistive device, home activities of daily living, health management, communication, psycho-emotional support, leisure activities, social participation, general strategies. All 68 items was arranged in important order. The content validity, stability, agreement index in this study were 0.81, 0.15, 0.79 respectively. When content validity, stability was above 0.49, below 0.5 in Delphi survey with 15 panels, it was not required additional survey. The result of this study meaned that it was not required to additional Delphi survey, and the result was stable and agreeable. This developed guideline was useful and practical to maintain the elderly's with dementia independent and healthy life as education materials for their caregivers, so it will expect to decrease caregiver's burden. Lastly, it stated limitation and suggestion for further study.