• 정보보호학회논문지
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• 제31권5호
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• pp.1021-1030
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• 2021

본 논문은 현대의 복잡한 사이버 공격을 모사하는 훈련 시나리오를 효과적으로 표현하기 위한 모델인 S-CAFG(Stage-based Cyber Attack Flow Graph)를 제안하고 평가한다. 이 모델은 더 복잡한 시나리오 표현을 위해 기존 그래프 및 트리 모델을 결합하고 stage 노드를 도입했다. 평가는 기존 모델링 기법으로는 표현하기 어려운 시나리오를 제작하고 이를 S-CAFG로 모델링하는 방식으로 진행했다. 평가 결과, S-CAFG는 동시 공격, 부가적 공격, 우회 경로 선택 등 매우 복잡한 공격 시나리오를 효과적으로 표현할 수 있음을 확인했다.

• 사상체질의학회지
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• 제22권3호
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• pp.87-97
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• 2010

1. Objectives: In SCM, a personal Sasang constitution must be determined accurately before any Sasang treatment. The purpose of this study is to develop an objective method for classification of Sasang constitution. 2. Methods: We collected samples from 5 centers where SCM is practiced, and applied two-stage decision tree analysis on these samples. We recruited samples from 5 centers. The collected data were from subjects whose response to herbal medicine was confirmed according to Sasang constitution. 3. Results: The two-stage decision tree model shows higher classification power than a simple decision tree model. This study also suggests that gender must be considered in the first stage to improve the accuracy of classification. 4. Conclusions: We identified important factors for classifying Sasang constitutions through two-stage decision tree analysis. The two-stage decision tree model shows higher classification power than a simple decision tree model.

• International journal of advanced smart convergence
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• 제9권3호
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• pp.227-231
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• 2020

Recently, the importance of user experience (UX) has been rapidly increasing. Its utilization is emphasized for development of systems, products, and services. User experience is widely used across industries including services, products, processes, society, and culture. Therefore, if it is unsatisfactory, it is likely to have a direct negative impact on the corresponding system, product, or service. The failure to analyze user experience causes significant damage to the project, which may lead to its failure or redevelopment; it is hence necessary to prioritize the verification of UX in the earliest stages of development. The requirements development stage, which is a preceding stage, is an appropriate stage for the verification of user experience because the identification of user needs is completed and prototypes can be implemented. In this paper, we proposed a systematic requirements development stage; it adds user experience verification activities to the requirements development stage, using the Honeycomb model, which is a widely used tool for verifying the overall UX. User experience verification was added to the existing requirements development activities, which consisted of three steps: model definition and requirements placement, discussions between external and internal stakeholders, and review by internal stakeholders. By easily validating the user experience through this systematic requirements development stage, we expect to minimize the damage to the project due to the failure of the user experience analysis and increase the possibility of success.

• 보건교육건강증진학회지
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• 제27권2호
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• pp.79-93
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• 2010

Objectives: This study aims to identify the factors associated with the stages of change in colorectal cancer screening, and develop a model explaining these stages of change by using structural equation modeling analysis. Methods: On the basis of literature review and expert advice, we constructed our hypothetical model that consisted of five theoretical constructs(process of change, pros, cons, self-efficacy, stage of change). In 2009, data was collected from 486 participants aged between 50 and 69. The data were analyzed by SPSS 15.0 and AMOS 6.0. Results: In the case of stage of adoption, the contemplation stage was the most common (37.4%), followed by the action stage (26.5%). In the final model of the stage of change for colorectal cancer screening, there was a direct influence of the process of change ($\gamma$=.562, p<.001), and cons ($\gamma$=.132, p<.01) on the stage of change with the terms of GFI .931, AGFI .904, RMR .038, NFI .930, and NNFI .936. Conclusion: It is necessary to produce and disseminate evidence-based cancer screening information, which can mitigate the negative attitude among the public toward cancer screening. Also, it is essential to provide a safer and more comfortable environment at cancer screening center.

• Journal of the Korean Data and Information Science Society
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• 제14권4호
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• pp.1067-1082
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• 2003

In this paper, we propose a randomized response model with discrete quantitative attribute by three-stage cluster sampling for obtaining discrete quantitative data by using the Liu & Chow model(1976), when the population was made up of sensitive discrete quantitative clusters. We obtain the minimum variance by calculating the optimum number of fsu, ssu, tsu under the some given constant cost. And we obtain the minimum cost under the some given accuracy.

• 한국보건간호학회지
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• 제18권2호
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• pp.205-217
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• 2004

This study conducted a survey with the 67 students who are in their 2nd year at 3 vocational high schools. The researcher of this study developed and operated the smoking cessation program based on the Transtheoretical model. To evaluate the effects, experiments were repeatedly done. The data were collected from June 21, 2004 till July 9, 2004. The survey was done based on the questionnaire-interview before and after education. The collected date was computerized by using SPSS-WIN 10.0 program. The results are as follows: Firstly. before education, the smoking cessation stage of change shows precontemplation stage $37.3\%$, preparation stage $37.3\%$, and contemplation stage $25.4\%$ respectively. However, after education it shows preparation stage $44.8\%$, action stage $25.4\%$, contemplation stage $19.4\%$, precontemplation stage $10.4\%$. The positive result was $62.7\%$ and smoking cessation stage of change made a 0.9 step increase. Secondly, process of change rose in all the areas except helping relationship. It also shows statistical improvement in all the fields except the dramatic relief of the experiential process, the helping relationship of behavioral process and stimulus control Thirdly, negative affective situation temptation, positive social situation temptation, and habitual strength temptation's average points decreased but showed statistical differences. Weight control temptation's average points decreased after education but didn't show statistical differences. Self efficiency increased measurably after education. Fourthly, concerning the social pros and coping pros caused by smoking, the average points were low after education and showed statistic decrease. As for the cons due to smoking, the average points increased but didn't show any statistical differences. In conclusion, thanks to the smoking cessation program applied by the Transtheoretical model, the smoking rate of vocational high school students became low and their smoking temptation also dropped considerably. In conclusion, while the pros for smoking were lessened, its corns were heightened through the educational awareness offered by this program.

• Communications for Statistical Applications and Methods
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• 제18권4호
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• pp.423-431
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• 2011

본 논문에서는 사회적으로나 개인적으로 매우 민감한 조사에서 조사하고자 하는 모집단이 여러개의 층으로 구성되어 있는 경우에, 김종호등 (1992)이 제안한 2단계 무관질문모형에서 사용한 단순임의 추출법 대신에 층화추출법을 적용하여 각 층의 모비율에 대한 추정뿐만아니라 모집단 전체 모비율에 대한 추정을 할 수 있는 층화 2단계 무관질문모형을 제안하였다. 그리고 층화 2단계 무관질문모형을 층화 3단계 무관질문 모형으로 확장하였다. 또한, 제안한 2단계와 3단계 층화 무관질문모형들에 있어서 각 층의 표본배분에 대하여 비례배분과 최적 배분 문제를 고려하여 다루었다. 마지막으로 층화 2단계 무관질문모형과 층화 3단계 무관질문모형과의 상대효율을 비교하였으며, 그 결과 층화 3단계 무관질문모형이 층화 2단계 무관질문모형보다 효율성면에 있어서 더 우수함을 알 수 있었다.

• 토지주택연구
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• 제14권1호
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• pp.123-134
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• 2023

설계단계에서 작성된 BIM모델은 후속 단계 전환을 통한 사전검토 및 공정관리 등에 활용될 수 있다. 그러나 실제 BIM적용 사례들의 경우 설계단계와 시공단계의 활용 목적성 등의 차이로 인해 설계단계의 모델의 활용이 아닌 시공단계에 적합한 새로운 모델을 작성하는 등 추가 작업이 요구된다. 따라서 본 연구에서는 시공단계에서 재작성 없이 설계단계 BIM모델의 재활용 방안으로 객체 분할을 제안하며, 이를 위해 객체의 기본요소인 정점 데이터를 기반으로 분할 면을 생성하여 객체 분할에 활용하는 방법론을 제시한다. 또한 실제 BIM모델에 적용 및 분할 객체의 4D CAD 시스템 연동과 기존 분할 방법과의 비교를 통해 활용성을 검증한다.

• 한국경영과학회지
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• 제20권1호
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• pp.27-34
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• 1995

In this paper, we have developed a model to determine the input quantity to be processed at each stage of a multi-stage production system in which the yield at each stage may be random and may need reworking at this stage. Yield randomness. especially in a semiconductor industry, is a most challenging problem for production control. The demand for flnal product is uncertain. We have extended the model proposed in Park and Kim[9] to consider a multiple number of reworkings which can be done at any stage prior to or tat the stage whose output in bad, depending on the level of the defect.

• 한국생산제조학회지
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• 제19권4호
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• pp.476-484
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• 2010

Precise positioning stages are often employed for precise machinery. For the purpose of vibration isolation, these precise positioning stages are mounted on a heavy base structure which is supported by compliant springs. Then the base structure is subjected to residual vibration due to the reactive force and vertical moving load induced by the stage motion. This paper investigates the vibration behavior of a positioning stage base and the associated vibration suppression technique. A dynamic model is developed to investigate the base vibration due to the reactive force and moving load effects by the moving stage. An input shaping technique is also developed to suppress the residual vibrations in base structures. Simulations and experiments show that the developed dynamic model adequately represents the base vibration and that the proposed input shaping technique effectively removes the residual vibrations from the positioning stage base.