• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.109-109
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• 2022

유효가뭄지수(Effective Drought Index, EDI)는 현재 기후에 대한 과거, 미래 기후에서의 상대적인 가뭄 특성 변화를 평가하기 위해 최근 30년간의 일 강수량 자료를 고정된 기준치로 사용한다. 이에 따라 장기간에 걸친 다양한 기후변화에 대한 인간 사회의 적응을 고려하며 가뭄의 영향을 평가할 때에는 한계점이 있다. 이 연구에서는 EDI의 기능을 확장하기 위해 자가교정 유효가뭄지수(self-calibrating EDI, scEDI)를 제안하고 그 성능을 평가하였다. 기존 EDI와는 다르게 scEDI는 관측시점을 기준으로 30년씩 이동하며 시간에 따라 변화하는 기후값을 기준치로 사용한다. 우리나라 서울관측소에서 1777년부터 2020년까지 누적된 244년간의 일 강수량 자료를 바탕으로, scEDI와 3개의 서로 다른 기후 기준치를 가진 기존 EDI를 계산하여 평가된 가뭄들의 특성을 비교하였다. 그 결과, 기후 기준치에 따라 서로 다른 가뭄 특성들을 보인 기존 EDI와 달리, scEDI는 변화하는 기후를 고려하여 분석기간에 걸쳐 가뭄의 특성을 일관되게 평가할 수 있는 것으로 밝혀졌다. 1807년부터 1907년까지 가뭄과 관련된 조선왕조실록의 기록과 scEDI가 평가한 과거 가뭄 사례들과 비교해 본 결과, scEDI가 탐지한 가뭄 사례들과 실제 조선왕조실록의 가뭄 기록이 비교적 잘 일치하여, scEDI가 과거의 사회적 가뭄을 잘 탐지하는 것으로 나타났다. 또한, 최근의 사회적 가뭄에 대한 scEDI의 탐지 능력을 평가하기 위해 구글과 네이버에서 2016년부터 2018년까지 수집된 가뭄 관련 검색어 소셜 빅데이터를 사용하여서 비교하였다. 그 결과, 과거와 마찬가지로 현재에서도 scEDI가 평가한 가뭄의 변화와 소셜 빅데이터에서 나타난 가뭄에 대한 사회적 반응이 잘 일치하는 것으로 나타났다.

• Journal of the Korean Society of Radiology
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• v.12 no.3
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• pp.343-349
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• 2018

Dose rate regulated tracking is known to be an efficient method which adaptively delivers tracking treatments when patient breathing is irregular. The Motion Management Interface (MMI, Varian Medical System, CA), which provides beam on/off switching during treatment is available for clinic. Study is to test if delivering the adaptive tumor tracking is feasible for irregular breathing using beam switching with MMI. 55 free breathing RPM traces acquired from lung cancer patients are used. The first day RPM traces of the patients are utilized to design preprogrammed tracking MLC patterns, of which periods are intentionally reduced by 20% in order to catch up the variation of patient breathing irregularity in the treatment day. Eligibility criteria for this technique are the variation of amplitude and period less than 20%. An algorithm which determines beam on/off every 100 ms by considering the preprogrammed (MLC) positions and current breathing positions is developed. Tracking error and delivery efficacy are calculated by simulating the beam-switching adaptive tracking from the RPM traces. Breathing patterns of 38 patients (70%) met the eligibility criteria. Tracking errors of all of the cases who meet the criteria are less than 2 mm (average 1.4 mm) and the average delivery efficacy was 71%. Those of rest of the cases are 1.9 mm and 48%. Adaptive tracking with beam switching is feasible if patient selection is based on the eligibility criteria.

• Journal of Korea Water Resources Association
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• v.53 no.6
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• pp.395-408
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• 2020

This paper aims to develop and apply three different machine learning approaches (i.e., artificial neural networks (ANN), adaptive neuro-fuzzy inference systems (ANFIS), and wavelet-based neural networks (WNN)) combined with an evolutionary optimization algorithm and the k-fold cross validation for multi-step (days) streamflow forecasting at the catchment located in Algeria, North Africa. The ANN and ANFIS models yielded similar performances, based on four different statistical indices (i.e., root mean squared error (RMSE), Nash-Sutcliffe efficiency (NSE), correlation coefficient (R), and peak flow criteria (PFC)) for training and testing phases. The values of RMSE and PFC for the WNN model (e.g., RMSE = 8.590 ㎥/sec, PFC = 0.252 for (t+1) day, testing phase) were lower than those of ANN (e.g., RMSE = 19.120 ㎥/sec, PFC = 0.446 for (t+1) day, testing phase) and ANFIS (e.g., RMSE = 18.520 ㎥/sec, PFC = 0.444 for (t+1) day, testing phase) models, while the values of NSE and R for WNN model were higher than those of ANNs and ANFIS models. Therefore, the new approach can be a robust tool for multi-step (days) streamflow forecasting in the Seybous River, Algeria.

• Journal of the Economic Geographical Society of Korea
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• v.16 no.4
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• pp.567-584
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• 2013

This study aims to explore an evolutionary path of the IT service industry in Fairfax County using the Cluster Adaptive Cycle model in economic geography. The analysis is based on detailed historical and industrial information obtained through a variety of data sources including local archival materials, economic census, and interviews. This study also performs a shift-share analysis during the period of 1990 to 2011. Using the adaptive cycle model, the local IT service industry is indicated by a trajectory of constant cluster mutation. The evolution of the local IT service industry has been closely related to federal government policy due to the regional specificity of the National Capital Region and the proximity of the Department of Defense. Although the economic downturn of the late 2000s, the local IT service industry has been notable resilience and adapted to a changing market and technological environment. This constant mutation of the local industry is resulted from not only high resilience which is based on the large government procurement market, the reinforcement of adaptive capacity of the local firms and the network of economic agents such as firm and supporting institutions, but also high flexibility of the knowledge-based service industry to a changing business environment.

• Korean Journal of Social Welfare Studies
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• no.37
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• pp.429-455
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• 2008

The purpose of this study is to generate a substantive theory that accounts for the social readaptation of the women who have engaged in prostitution and propose a practical program for them. We used the grounded theory developed by Strauss and Corbin(1990). Raw data were collected through the in-depth interview, documents and observation. We used constant comparative method for the data analysis. The nine women who had the exprience of prostitution have participated in this study. As a result of the data analysis, in open coding were generated 116 concepts, 29 subcategories and 12 categories, In axial coding the outcomes of a paradigm model were as follows. The causal conditions were named 'hostile environment' and 'the self endowed stigma'. The phenomenon turned out to be 'living as an anonymous being'. The contextual conditions were named 'cohesion of family', 'being pushed' and 'shrinked emotion'. The intervening conditions were presented to be 'desire of self restoration as a social being', 'reactionary reconstruction'. The action/interaction strategies turned out to be 'shifting of social status', 'neighbor alliance'. The consequences were presented to be 'psychological wayfarer' and 'tentacular living'. In selective coding we found a core category, 'repetition of leaving and returning from the life world'. Based on the phenomenon, two types of participants life attitudes were found as follows : present hesitating type, self concealing type. Following the adove results, We finally suggested the need to develope a community oriented case management model.

• Korean Journal of Comparative Education
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• v.23 no.5
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• pp.53-75
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• 2013

This article explores the impact of mergers on the experiences of students. A case design is used to gain an in-depth understanding of the students in a Korean university that was combined with a two-year college in 2007. Semi-structured interviews of 11 direct entrants, 5 transfer students, and 7 professors were conducted in 2010 for the data collection. The results suggest that mergers do not necessarily ensure the integration of the students involved. Since mergers pose enormous challenges to both transfer students and direct entrants, university leaders need to give careful attention to students' persistence and integration as the campus changes. The results also reveal that students' experience of mergers may be affected by cultural backgrounds as well as the hierarchical structure of higher education. In Korean society, where credentialism prevails, mergers can have different impacts on students who come from initial institutions of differing perceived quality, and thus mergers may incite tension among the students. In light of these concerns, this study's findings highlight the importance of student integration as a key element in mergers.

• Journal of Industrial Convergence
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• v.19 no.1
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• pp.17-26
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• 2021

This study was conducted to do in-depth exploration of coroperate employees' learning experiences for workplace under COVID-19. We collected data through depth interviews from August 10th to November 30th, 2020 with five employees of S Energy company, and a qualitative case study was conducted using Ricci's 3-step analysis procedure. As a result, In the process of adapting from the landing of COVID-19, "The Story of a Distant Country," "No More Safe Zones," "Exploring effective responses created by a Sense of Crisis," and "Learning the changed way of work for adaptation." appeared. In addition, It has been found that the experience of learning in the work environment of the With Corona era includes "learning experience for survival from a sense of crisis", "learning experience for adapting to Untact culture", "learning experience through SNS communication", and "competitive learning experience for performance creation". In conclusion, employees have adapted to changes in the workplace environment through various learning experiences, which can enhance workers' ability to cope with crisis situations and can be used as basic data for an effective learning. In the future, we suggested follow-up researches of corporate employees in various fields.

• Journal of the Korean Regional Science Association
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• v.40 no.3
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• pp.109-126
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• 2024

The central government has been promoting innovation cities since the early 2000s for the balanced development of the country in order to solve the problems of overcrowding in the metropolitan area and underdevelopment of the country due to rapid urbanization since the 1980s. The 10 innovation cities built through the regional relocation of public institutions were expected to have positive effects such as economic revitalization and population influx, but uncertainties and various externalities still exist. Therefore, this study aims to analyze innovation cities from the perspective of urban resilience to create sustainable cities. To this end, the research analyzed urban factors in the physical, natural, social, economic, and institutional dimensions of Ulsan Ujeong Innovation City, and applied the Adaptive Cycle and Panarchy to comprehensively analyze them. As a result of the analysis, it was found that the built, socio-economic, and natural environments are currently undergoing the adaptive cycle stages of preservation, reorganization, and growth, respectively, and the interaction and structural causal relationships between Korea, Ulsan Metropolitan City, and Ulsan Ujeong Innovation City were identified. The study concluded that Ulsan Ujeong Innovation City can be sustainable by utilizing opportunities such as the central government's Innovation City Season 2 and financial support, construction of Janghyeon Advanced Industrial Complex, and fostering local innovation clusters according to local conditions.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.647-658
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• 1998

다구찌 기법으로 더 알려진 품질공학은 아직도 우리 나라 현장에선 어려운 것으로 인식되어 잘 사용되지 않고 있다. 일본에서는 품질공학을 다방면에 적용하고 있다. 제공공정이나 화학공정에 사용되는 것은 당연하나, 양복 디자이너, 의사의 진단에도 적용한 것이 보고되고 있다. 품질공학을 고정된 기법으로 보는 것이 아니라, 모든 현실의 문제를 해결하는 방법으로 적용을 넓혀가고, 새로운 연구를 거듭하고 있다. 그럼에도 불구하고, 일본 JUSE나, 전문가들은 품질공학 확산을 위해 다방면으로 노력하고 있다. 현재 일본에선 품질공학을 ISO화하자는 주장이 있다. 의무적으로 모든 공장에 적용 시키자는 것이다. 일본 전문가들은 일본 기업 운영 시스템이 경직되었음을 경고하면서, 일본의 경영자 층과 관리자 층이 환경변화에 적응하지 못하고, 구태의연한 모습을 많이 지적한다. 기술자들도 수동적이고, 새로운 시도를 하지 않는 무사안일 주의가 팽배했음도 지적하고 있다. 구미의 엔지니어들은 좋은 기법이라면, 스스로 먼저 공부하여 적용하는 데 비하여, 한국이나 일본에서는 좋은 기법의 활용도 경영층의 이해가 선행되야 한다. 경영층이 품질공학을 이해하지 못하면 도리어 품질공학 도입을 반대하게 된다. 경영층을 이해 시키는 방법으론, 현재의 상태가 위기임을 강조하고, 새로운 방법으로 품질공학을 소개한다. 그 다음 품질공학의 사례를 들어 확신을 심어주는 것이 한 방법이다.

• Journal of Korean Clinical Health Science
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• v.5 no.3
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• pp.973-980
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• 2017

Purpose. To understand the effectiveness of training programs to improve the daily living activities and social adaption abilities of stroke patients. Methods. The participant included 1 stroke patient in Jeonbuk, from March to August 2016. The test tools used was the Canadian occupational performance measurement, International classification of function, disability and health co-resets. After applying the training program, I compared the daily life satisfaction and social adaption abilities. Results. According to this study, both daily life satisfaction and social adaption abilities improved. Conclusion. In conclusion, after an exercise program, self- help program, and underwater exercise programs, daily life satisfaction and social adaptation levels were improved. Therefore, the programs that apply to stroke patients could be found to be effective.