• Journal of the Society of Naval Architects of Korea
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• v.36 no.2
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• pp.29-39
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• 1999

In this study, mathematical modelling for initial motion of test vehicle launched from sliding launcher is performed, and simulation results from this mathematical models are verified by comparing them with sea trial results. Especially, it is showed that models using strip method give better results than using empirical formulae and linear equations of motion. This mathematical model can give useful tools to design sliding launchers or test vehicles.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2002.12a
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• pp.263-266
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• 2002

데이터의 군집화를 수행할 때 최적 군집수 결정은 군집 결과의 성능에 많은 영향을 미친다. 특히 K-means 방법에서는 초기 군집수 K에 따라 군집결과의 성능 차이가 많이 나타난다. 하지만 대다수의 군집분석에서 초기 군집수의 결정은 경험을 바탕으로 하여 주관적으로 결정된다. 이때 개체수와 속성수가 증가하면 이러한 결정은 더욱 어려워지며 이때 결정된 군집수가 최적이 된다는 보장도 없다. 본 논문에서는 군집의 수를 자동으로 결정하고 그 결과의 유효성을 보장하기 위해 유전자 알고리즘에 기반한 최적 군집수 결정 방안을 제안한다. 데이터의 속성에 근거한 초기 해 집단이 생성되고, 해 집단 내에서 최적화된 군집수를 찾기 위해 교차 연산이 이루어진다. 적합도 값은 전체 군집화의 비 유사성의 합의 역으로 결정되어 전체적인 군집화 성능이 향상되는 방향으로 수렴된다. 또한 지역 국소값을 해결하기 위해 돌연변이 연산이 사용된다. 그리고 유전자 알고리즘의 학습 시간의 비용을 줄이기 위해 붓스트랩 기법이 적용된다.

• 한국벤처창업학회:학술대회논문집
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• 2018.11a
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• pp.159-162
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• 2018

대다수의 창업 기업들이 창업 초기 단계에 만족할 만한 창업성과를 이루지 못하고 좌절하는 경우가 있기에 창업 기업의 창업 준비단계 및 초기 단계가 매우 중요하다. 이처럼 대부분의 초기 창업가들은 경험의 부족으로 인하여 창업성과를 내는 데에는 한계가 있다고 볼 수 있다. 이에 본 연구는 기존의 창업 멘토링 선행연구와 차별성을 두어 코치와 피코치(창업가) 간의 협력관계를 통하여 창업코칭 활동으로 창업가의 의식전환을 매개로 창업성과에 미치는 영향에 대한 연구를 진행하였다. 이를 위하여 창업가를 대상으로 자료를 수집, 실증 분석하였다. 본 연구결과는 향후 창업코칭 활동이 창업성과 향상을 위한 시사점을 제공할 뿐만 아니라 창업코칭 활동 연구 확산에도 기여할 수 있을 것이라고 판단된다.

• Journal of Service Research and Studies
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• v.14 no.1
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• pp.44-62
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• 2024

The development of online funeral services and social issues of eco-friendly funeral culture have raised awareness of the new need for online funeral culture. There have been several attempts to revitalize online funeral services in domestic institutions and companies, but the effect is weak. The purpose of this study is to propose a design that can improve the accessibility and usability of online memorial services by analyzing the usability problem factors through a First Time User Experience analysis of the online memorial platform. Therefore, in this study, in order to identify the problem factors of the online memorial platform, a literature review on the UX, OOBE, and FTUE theories was conducted. The subject of the study was the app 'Memorial'. Before analyzing the First-Time User-Experience, IA was compared and analyzed with other similar services to understand the characteristics of the UX service of the app 'Memorial', which is the subject of the study. In addition, tasks corresponding to the Unpack-Setup/Configure-First Use stage were performed on 10 subjects who had no experience using the online memorial platform. The experimental process was expressed as the UX Curve to identify factors that caused negative experiences. As a result, the major problem factors included unnecessary UI elements, the need for sensitive personal information at the membership stage, and lack of immersion in the service. The improvements included strengthening community functions to facilitate the sharing of emotions and promote smooth communication between users. We proposed UI/UX service developments that enhanced the app by incorporating these insights. In order to verify the effectiveness, serviceability, and value of the developed prototype, an interview with a expert was conducted. The interviewes consisted of three service design experts. This study was conducted to contribute to the quality improvement and activation of the recently emerging online funeral services. The study is significant as it aims to understand the current status of these services and identify the factors necessary to improve service accessibility and usability. Subsequent studies require in-depth user verification of how much the proposed improvement plan affects the actual user experience.

• Journal of Korean Academy of Nursing
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• v.37 no.1
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• pp.35-43
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• 2007

Purpose: This study was to explore the prevalence of alcohol experiences and to identify the expectancy on the effects of alcohol and alcohol knowledge in early adolescents. Method: The cross-sectional survey of 1854 students from seven middle schools in one district of Seoul was conducted by convenience sampling. Alcohol experience and early onset of alcohol use were measured by the Youth Risk Behavior Survey. Alcohol expectancy was measured by an Alcohol Effects Questionnaire. Result: Over sixty five percent of adolescents reported that they had previous drinking experiences. The participants with no alcohol drinking experience had a lower level of alcohol knowledge than those with experience(t=2.73, p=.007). In expectancy on effects of alcohol, girls had a more positive alcohol expectation than boys(t=-2.54, p=.011). Alcohol knowledge negatively correlated with alcohol expectancy(r=-.40 p=.000). In regression of alcohol expectancy, gender and alcohol knowledge were significant predictors explaining 17%. Conclusion: The results support that alcohol expectancy is an important link with early drinking experiences and alcohol knowledge, focusing on the importance of gender differences. Therefore, an alcohol prevention program in early adolescence is needed and should be focused on multidimensionality of the alcohol expectancy with developmental and psychosocial factors for early adolescents.

• Journal of Navigation and Port Research
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• v.29 no.8 s.104
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• pp.667-671
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• 2005

This study was carried out to examine the prediction of ship's manoeuvrability in initial design stage. New parameter representing basic hull form and stem shape were proposed. Captive model test were carried out to investigate the correlation coefficient between hydrodynamic coefficient and hull parameter. The results showed which parameter are positive correlation with hydrodynamic coefficient. Moreover correlation was examined between stem hull shape and ship's manoeuvrability. New empirical formulas for hydrodynamic coefficients were proposed These results can be used to predict a ship's manoeuvrability in initial design stage.

• Journal of Korea Technology Innovation Society
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• v.7 no.1
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• pp.21-41
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• 2004

본 고는 우리나라 정보통신산업에 있어서 정부사용목적의 연구개발투자를 제외한 국가지원 연구개발투자에 따른 기술의 상용화 전략특성에 관해 연구한 논문이다. 연구의 주요내용을 보면 기술상용화에 관한 기존연구 결과에 대한 분석을 통하여 기술상용화에 영향을 미치는 요인들을 도출하였으며, 사용화 프로세스모형에 대한 프레임워크를 제시하였다. 나아가 상용화 영향요인과 사용화 전략과의 관계, 상용화 성과와 영향요인과의 관계에 관한 연구모형을 설정하였으며, 정보통신 개발기술의 상용화 경험을 가지고 있는 기업을 대상으로 한 설문조사를 통하여 실증분석을 하였다. 본 연구의 분석에 사용된 설문지는 전체 상용화 건수 중에서 상용화 경험이 있는 기업이 대표적인 기술을 대상으로 조사되었다. 이러한 분석의 결과를 기반으로 정보통신 기술상용화의 촉진을 위한 효율적인 정책도출을 위한 다음의 대안을 제시하였다. 상용화를 촉진하기 위해서는 산학연간의 협력관계, 기술상용화 인프라의 구축, 정부의 상용화 프로그램에 대한 올바른 정보의 제공, 상용화 네트워크의 구축, 신기술/제품에 대한 초기 시장보호 및 침투 지원 등이 이루어져야 하겠다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.4
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• pp.265-275
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• 2018

This study is a qualitative investigation that used Colaizzi's (1978) phenomenological method to evaluate the meaning and nature of the experience of dialysis of eight long-term (>30 years) hemodialysis patients with chronic renal failure. Data were collected from February 27, 2017 to May 30, 2017 by in-depth interviews. Respondents were then divided into three categories, 'entirely different life', 'getting back up again' and 'focusing on survival' with nine theme clusters and 22 themes. In general, patients initially experienced an entirely different life and overcame a difficult situation when beginning dialysis, then came to know methods for self-care, shared the experience of dialysis, and focused on survival while receiving dialysis over the long-term. Development of variety of education methods depending on long-term experience of dialysis and nursing care intervention to enable chronic patients to adapt to dialysis and continue their own self-management is necessary.

• Industry Promotion Research
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• v.5 no.3
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• pp.97-104
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• 2020

The study participants selected three participants in their late 40s and conducted a total of six sessions and in-depth interviews for 90 minutes to collect and analyze data using the phenomenological Giorgi research method. The conclusion according to the research results was drawn as follows. First, the shame, fear, reprimand, violence, passive attitude, and childhood that had to be adjusted seemed to maintain a stable life in the late forties, but still appeared in the present life. It was found that they showed a low self-satisfaction rather than positive satisfaction with self-concept and pursued an ideal self-image. Second, lifestyle was a time of severe depression, lethargy, and emptiness as a child, experiencing an unstable childhood due to a violent family, loss of attachment, overprotection, difficult economic conditions, and parental strife. It has been found that in the late forties, families have been established and religious life is being stabilized, and the responsibility for the family is valued. This shows how a lifestyle that gives meaning and recognizes what experience gives meaning to the childhood that one experienced. Insight into change and growth in middle-aged life, searching for and interpreting the initial recollections that they have experienced, accompanied by social and psychological changes in middle-aged men, discovering inappropriate meanings and goals and preparing for a second life in the age of 100 It is meaningful to provide.

• Korean Journal of Family Social Work
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• no.58
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• pp.67-96
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• 2017

The purpose of this study is to examine psychological difficulties that elderly women experience in each divorce decision making stage and they are shown by counselling cases made with elderly women who got divorced in their early stage of elderly life. For this purpose, total 18 counseling cases were collected from November 2012 to March 2013 and a qualitative analysis was made accordingly. The result of this study was made by analyzing meaningful subjects emerged in individual testimonies during a counseling process and it shows that the decision to divorce goes through stages such as , , , , , and . In addition, psychological difficulties experienced in a divorce decision process appear to be, , , , , , and . It is meaningful that this study provides counseling strategies for psychosocial support of the elderly women who go through difficulties in their divorce decision making process.