• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2006년도 한국컴퓨터종합학술대회 논문집 Vol.33 No.1 (B)
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• pp.376-378
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• 2006

본 논문에서는 소동물 양전자방출단층촬영 영상(Positron Emission Tomography, PET) 내 종양영역을 자동분할하고 분할된 윤곽선주변의 기하학적 위험구간에 따른 종양의 형태특성을 분석하기 위한 방법을 제시한다. PET 영상내 검출된 종양영역의 신뢰성을 위해 위음성(False negative, FN) 및 위양성(False positive, FP)의 위험구간을 같이 제공하는 것이 필요하다. 따라서, 방사선 특이적 특성이 반영된 명암값을 기반으로 Fuzzy C-Means(FCM) 클러스터링을 수행하여 종양영역을 자동 분할한다. 분활된 종양영역의 위험구간은 클러스터 간 공유되는 영역의 소속값을 이용하여 위음성, 위양성을 계산한다. 또한, 임의의 소속값 임계치 변화를 통해 위험구간의 변화에 따른 종양의 형태적 특성변화를 관측한다. 이러한 지역적 변화의 관측을 통해 위험구간의 형태학적 위치를 판단할 수 있어 위험구간에 따른 추가적인 잔여 암의 위치 및 형태 파악을 용이하게 한다.

• 한국재난정보학회 논문집
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• 제5권1호
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• pp.10-27
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• 2009

The fear briefly became reality in the U.S. after 9/11, as man-made anthrax spores were found in letters and in east coast post offices on a number of occasions. Anthrax attacks must be related to the terrorist attacks of September 11. These two accidents changed the situation completely. Characteristics are summarized as belows. First, it is necessary for all countries to create each own appropriate countermeasures against bioterrorism. In addition, it is urgent to consider countermeasures focusing on bioterror characteristics that terrorists may use biological agents because they can be extremely difficult to detect and do not cause illness for several hours to several days. Otherwise, those attacks will also show the panic and very real danger posed by the release of such toxins on an unsuspecting public. Second, it is crucial to manage the result thoroughly. A biological weapon is useful to a terrorist group mainly as a method of creating mass panic and disruption to a society. Because it is not easy to predict and collect information about how terrorists utilize pathogenic microbe as well as terror measures in their activities, more realistic approach should be taken to reduce damage. Third, to expand investment in research and development is necessary. Considering advances in microbiology and genetic engineering lately, it is likely that new pathogenic microbe would be created by the enemy. For that matter, it is imperative that medical countermeasures should be devised.

• Safety and Health at Work
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• 제12권1호
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• pp.42-50
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• 2021

Introduction: Despite huge investments in new technology and transportation infrastructure, terrible accidents still remain a reality of traffic. Methods: Severe traffic accidents were analyzed from four prevailing modes of today's transportations: sea, air, railway, and road. Main root causes of all four accidents were defined with implementation of the approach, based on Flanagan's critical incident technique. In accordance with Molan's Availability Humanization model (AH model), possible preventive or humanization interventions were defined with the focus on technology, environment, organization, and human factors. Results: According to our analyses, there are significant similarities between accidents. Root causes of accidents, human behavioral patterns, and possible humanization measures were presented with rooted graphs. It is possible to create a generalized model graph, which is similar to rooted graphs, for identification of possible humanization measures, intended to prevent similar accidents in the future. Majority of proposed humanization interventions are focused on organization. Organizational interventions are effective in assurance of adequate and safe behavior. Conclusions: Formalization of root cause analysis with rooted graphs in a model offers possibility for implementation of presented methods in analysis of particular events. Implementation of proposed humanization measures in a particular analyzed situation is the basis for creation of safety culture.

• 대한의용생체공학회:의공학회지
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• 제42권4호
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• pp.159-166
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• 2021

In order to analyze cell images, accurate segmentation of each cell is indispensable. However, the reality is that accurate cell image segmentation is not easy due to various noises, dense cells, and inconsistent shape of cells. Therefore, in this paper, we propose an algorithm that combines marker-based watershed segmentation and ellipse fitting method for glioblastoma cell segmentation. In the proposed algorithm, in order to solve the over-segmentation problem of the existing watershed method, the marker-based watershed technique is primarily performed through "seeding using local minima". In addition, as a second process, the concave point search using ellipse fitting for final segmentation based on the connection line between the concave points has been performed. To evaluate the performance of the proposed algorithm, we compared three algorithms with other algorithms along with the calculation of segmentation accuracy, and we applied the algorithm to other cell image data to check the generalization and propose a solution.

• 대한간호학회지
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• 제51권6호
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• pp.648-660
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• 2021

Purpose: This study aimed to develop an emerging infectious disease (COVID-19) simulation module for nursing students and verify its effectiveness. Methods: A one-group pretest-posttest quasi-experimental study was conducted with 78 under-graduate nursing students. A simulation module was developed based on the Jeffries simulation model. It consisted of pre-simulation lectures on disaster nursing including infectious disease pandemics, practice, and debriefings with serial tests. The scenarios contained pre-hospital settings, home visits, arrival to the emergency department, and follow-up home visits for rehabilitation. Results: Disaster preparedness showed a statistically significant improvement, as did competencies in disaster nursing. Confidence in disaster nursing increased, as did willingness to participate in disaster response. However, critical thinking did not show significant differences between time points, and neither did triage scores. Conclusion: The developed simulation program targeting an infectious disease disaster positively impacts disaster preparedness, disaster nursing competency, and confidence in disaster nursing, among nursing students. Further studies are required to develop a high-fidelity module for nursing students and medical personnel. Based on the current pandemic, we suggest developing more scenarios with virtual reality simulations, as disaster simulation nursing education is required now more than ever.

• 한국멀티미디어학회논문지
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• 제25권6호
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• pp.852-865
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• 2022

During the COVID-19 pandemic, games played an important role in people's lives. Numerous online users flocked to the game platform, and brand companies started using online games to promote their products. Medical institutions have also implemented policies for healthy physical activity through online games. In order to attract more global game users, research on immersion in games is also very important to prevent users from leaving the platform. Therefore, it is necessary to analyze the common immersion elements of popular games by country and study them from the perspective of changing devices. In this paper, representative popular games of Korea, China, and Japan, which are recently called the dark horse of the game industry, are classified by devices of mobile, online PCs, and VR games and analyzed using immersion analysis tools proposed by researcher. Next, the representative metaverse games of the Web 3.0 era were analyzed, and their characteristics were compared with the results of the immersion analysis between Korea, China, and Japan, and proposed as game immersion elements suitable for metabus games.

• 대한의용생체공학회:의공학회지
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• 제43권6호
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• pp.417-423
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• 2022

The present study proposed a new interface system for capsule endoscopy by using head mounted display (HMD) device, which can control the orientation of the capsule endoscope with electromagnetic actuator (EMA) system. The orientation information of the HMD user was detected by the gyroscope sensor built into the device and then calculated to as an angle increment using Unity Engine compiler. The measured angle changes from the HMD were converted to the current values of the corresponding coils to be changed in the EMA system. Two experiments were designed to measure the accuracy and the intuitiveness of the HMD interface system. In the angle accuracy measurement, the capsule endoscope driven by HMD interface system showed the averaged errors of 0.68 degrees horizontally and 1.001 degrees vertically for given test angles. In the intuitiveness measurement, HMD interface system showed 1.33 times faster manipulation speed rather than the joystick interface system. In this respect, the HMD interface system for capsule endoscopy was expected to improve the overall diagnostic environment while maintaining comfort of patients and clinicians.

• 한국보건간호학회지
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• 제36권3호
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• pp.347-360
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• 2022

Purpose: The purpose of this study was to identify the risk perception, safety climate and preventive behaviors of COVID-19 infections, and to verify the factors influencing the adoption of preventive behaviors by health care workers. Methods: A mixed-method approach was used based on a survey carried out in a general hospital. Quantitative data (N=181) were collected through a questionnaire and analyzed using multiple regression. Qualitative data (N=8) were collected through individual interviews and analyzed through Colaizzi's phenomological research method. Results: The factors influencing adoption of preventive behaviors by health care workers were safety climate (β=.41, p<.001), education (β=-.20, p=.025), work unit (β=-.16, p=.032), and risk perception (β=.15, p=.020). The explanatory power was 28.3%, and they have shown that these health care workers felt 'the threat of a pandemic like a battlefield', experienced 'struggle with quarantine rules' and realized 'the reality of infection control and the reorganization for change'. Conclusion: The findings of this study indicate that to increase the adoption of infection control preventive behaviors by health care workers when faced with new infectious diseases in the future, it is necessary to establish organizational support and a safe climate. This study confirms the need for preemptive support and education.

• International Journal of Advanced Culture Technology
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• 제11권3호
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• pp.302-309
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• 2023

This study aimed to develop a VR-based digital therapeutic intervention for the diagnosis and treatment of ADHD. The research combined medical data with virtual reality technology to develop an algorithm for ADHD diagnostic scales and implemented a VR-based digital therapeutic platform using a head-mounted display (HMD). This platform can be used for the diagnosis and treatment of ADHD in children and adolescents. Additionally, we four VR games were developed, including archery timing, Antarctic exploration, grocery shopping, and rhythm-based drumming(RBD), incorporating various psychiatric treatment techniques based on cognitive-behavioral therapy(CBT). To evaluate the usability of this digital therapeutic intervention, a group of experts specialized in counseling psychology participated in the study. The evaluations received highly positive feedback regarding the ability to access the system menu while wearing the HMD, the consistency of terminology used in menus and icons, the usage of actual size for 3D graphic elements, and the support for shortcut key functionality. The assessments also indicated that the games could improve attention, working memory, and impulse control, suggesting potential therapeutic effects for ADHD. This intervention could provide a daily treatment method for families experiencing financial constraints that limit hospital-based therapies, thereby reducing the burden.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2022년도 춘계학술대회
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• pp.589-591
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• 2022

시니어를 위한 메디컬 가상현실 서비스 개발을 목표로 하고 있으며, 시니어가 쉽고 안전하게 체험할 수 있는 가상현실 콘텐츠를 제작하는 것이 주된 목표이다. 본 연구의 최종 목표로는 체험에 집중하기 위한 환경을 조성하기 위해 안전시스템 구축 및 가족/친구와의 연결을 통한 소통 서비스를 개발한다. 시니어를 대상으로 가상현실 체험을 제공할 때 컨트롤러를 쥐고 상호작용을 해야하는 부분을 핸드트래킹 기술을 연구하여 컨트롤러 없이 물리적으로 양손을 자유롭게 하면서 피로감을 줄이는 것은 물론, 주변의 물건을 내려치거나 컨트롤러를 놓쳐 사고로 이어질 소지도 없애 체험에 집중하게 할 수 있는 환경을 제공하고 체험 중 신체에 이상현상이 나타날 경우 즉시 이를 알릴 수 있도록 콘텐츠 내에서 특정 제스쳐나 긴급 버튼을 통하여 체험시 발생할 돌발상황에 대한 대비를 위해 별도의 앱을 개발하고 체험과 상시 연결하여 체험중인 상황을 관제할 수 있도록 시스템을 구축하고, 알림을 통해 조기에 즉각 대처할 수 있도록 한다. 또한, 몸이 불편하거나 요양원 거주등으로 인해 사회적 단절의 해소를 위해 별도의 앱을 통해 체험중인 콘텐츠와 연결이 가능하도록 설계하고 상호간에 아바타를 통한 감정 표현 및 음성 채팅을 할 수 있게 하여 소통을 할 수 있는 서비스 개발하고자 한다.