• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2013.06a
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• pp.16-19
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• 2013

화이트 밸런스를 유지해야 하는 이유는 입력 이미지의 컬러 밸런스와 동질의 화질 유지를 위하거나, 혹은 이미지를 개선할 때 화질 균일 성을 유지하기 위함이다. 그러나 기존 컬러 개선 방식들은 화이트 밸런스 보존에 관계없이 컬러 개선이 이루어지기 때문에 컬러 개선 전과 후의 화이트 밸런스가 다르게 나타난다. 이 논문에서는 색 순응 변환을 이용하여 화이트 밸런스를 보존하면서 자연스러운 컬러 이미지 개선 및 컬러 측정 알고리즘을 제안한다. 그 결과는 제안된 알고리즘은 Color Naturalness Index 와 Color Colorful Index 라고 풀리는 객관적 방법뿐만 아니라 주관적인 방법 에서도 개선됨을 확인하였다. 알고리즘의 복잡도는 낮으므로 현실 어플리케이션에서도 유용하게 이용될 것이다.

• Journal of Environmental Science International
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• v.11 no.6
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• pp.471-482
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• 2002

The purpose of this study is in identifying the attraction degree of Seonunsan Provincial Park by quantitative analysis. For this, landscape slide test was performed by questionaries. And multiple regression analysis and Factor analysis were performed far identifying the attraction degree of users. The attraction degree of natural resources was evaluated by questionaries about the landscape scene of 120 slides which was pictured at the chief visual corridor So it is considered that tourism route far attracting people into natural characteristic resources should be developed. It is identified once again that factors of $\boxdr$Naturalness$\boxul$,$\boxdr$Uniqueness$\boxul$and $\boxdr$Mysteriousness$\boxul$are important in natural landscape. And 16 explanation variables which explain the attraction degree of viewing landscape were classified as 4 factors. Those were defined as $\boxdr$Ability (FⅠ)$\boxul$, $\boxdr$Season harmony (FII)$\boxul$,$\boxdr$Simplicity (FⅢ)$\boxul$ and $\boxdr$Legibility(FⅣ)$\boxul$. It is identified that the variables of FⅠ, mysteriousness, is a representative image which expresses the characteristics of Seonunsan Provincial Park.

• The Journal of Korean Medicine
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• v.45 no.1
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• pp.203-214
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• 2024

Objectives: In the context of competency-based education emphasized in Korean Medicine, this study aimed to develop a pilot version of a CPX (Clinical Performance Examination) Practicing Chatbot utilizing large language models with prompt engineering. Methods: A standardized patient scenario was acquired from the National Institute of Korean Medicine and transformed into text format. Prompt engineering was then conducted using role prompting and few-shot prompting techniques. The GPT-4 API was employed, and a web application was created using the gradio package. An internal evaluation criterion was established for the quantitative assessment of the chatbot's performance. Results: The chatbot was implemented and evaluated based on the internal evaluation criterion. It demonstrated relatively high correctness and compliance. However, there is a need for improvement in confidentiality and naturalness. Conclusions: This study successfully piloted the CPX Practicing Chatbot, revealing the potential for developing educational models using AI technology in the field of Korean Medicine. Additionally, it identified limitations and provided insights for future developmental directions.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.22 no.2
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• pp.73-92
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• 2019

The purpose of this study is to establish the conservation and restoration areas for sustainable stream management by reflecting the ecological health, cultural characteristics, and the citizens' needs for stream uses. Therefore, we extended spatial ranges of stream evaluation to riparian areas in addition to stream sections. The evaluation indexes are stream naturalness, availability, biota assessment, and riparian characteristics such as land uses and legally protected areas. The grading system was unified with five classes. The spatial evaluation units for stream section are classified as right and left for laterally and 500m for longitudinally. For riparian areas, 30m and 100m of distance from the edge of stream are applied as spatial evaluation units. The six types of stream sections for management are conservation sections(priority/general) and restoration sections(priority/general) for ecological landscape and core and general sections for cultural landscape. The established system for evaluation and designating areas for stream management was applied to Jeonjucheon and Samcheon in Jeonju-si, and the conservation and restoration areas were designated reflecting the characteristics of urban and non-urban areas and left and right of stream sections. The results of this study will provide detailed guidelines for designating stream sections and practical management strategies for sustainable urban stream management.

• Journal of the Korean Institute of Landscape Architecture
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• v.50 no.6
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• pp.42-57
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• 2022

This study aims to create a basic model for classifying the activity photos that urban park users shared on social media using Deep Learning through Artificial Intelligence. Regarding the social media data, photos related to urban parks were collected through a Naver search, were collected, and used for the classification model. Based on the indicators of Naturalness, Potential Attraction, and Activity, which can be used to evaluate the characteristics of urban parks, 21 classification categories were created. Urban park photos shared on Naver were collected by category, and annotated datasets were created. A custom CNN model and a transfer learning model utilizing a CNN pre-trained on the collected photo datasets were designed and subsequently analyzed. As a result of the study, the Xception transfer learning model, which demonstrated the best performance, was selected as the urban park user activity image classification model and evaluated through several evaluation indicators. This study is meaningful in that it has built AI as an index that can evaluate the characteristics of urban parks by using user-shared photos on social media. The classification model using Deep Learning mitigates the limitations of manual classification, and it can efficiently classify large amounts of urban park photos. So, it can be said to be a useful method that can be used for the monitoring and management of city parks in the future.

• Korean Journal of Agricultural Science
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• v.45 no.3
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• pp.547-559
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• 2018

Consumers are becoming increasingly interested in what kind of value their food has. Many studies have focused on consumers' preferences and willingness to pay for specific food values. However, few studies have asked consumers to consider or rank the importance of different food values. This paper determined consumers' food values by implementing the best-worst scaling approach and segmented consumers based on the relative importance of general food values that consumers place on them. Among a list of eleven food values (taste, safety, origin, appearance, price, environmental impact, naturalness, convenience, nutrition, fairness, and habit) which was compiled from previous studies on food preferences, on average, safety, nutrition, taste, and price were the most important values to consumers, whereas fairness, habit, appearance, convenience, origin, and environmental impact were the least important values. However, significant variation exists among consumers in terms of the relative importance of food values. To investigate the heterogeneity among consumers, a Latent Class Analysis was performed to classify consumers into subgroups based on responses to questions. Two latent classes were found and characterized as 'safety-nutrition' and 'taste-price'. The 'safety-nutrition' cluster represents 61% of the sample and a group of people who find safety and nutrition centered values to be the most important. Another cluster represents about 39% of the sample, and relative to the first group, this group finds price and taste values to be more important.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.18 no.6
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• pp.85-95
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• 2015

Recent years, nationwide projects for ecological restoration are implemented with emerging issues on the stream ecosystem. In order to enhance effectiveness of the ecosystem restoration and reduce negative impact, the appraisal of effectiveness through the follow-up monitoring and the adaptive management process are executed in consecutive phase. In this study, planning phase, monitoring and adaptive management in Hakui stream which is part of An Yang stream restoration project is introduced as representative ongoing case of effective adaptive management. The aim of this study is to verify the adaptive management process and suggest direction of effective restoration. Restoration project of Hakui stream resulted in increasing number and diversity of species (vegetation, fish, bird, invertbrates, amphibian and reptilia) according to monitoring from 2004 to 2013, and enhancing natural river landscape by evaluation of river naturalness among 2001(before restoration), 2007 (after), 2015 (recent). However, excessive vegetation expansion or sediment deposition on channel over time caused unexpected results such as terrestrialization or degradation of habitats. Adaptive management action such as removing disturbance species (Humulus japonicus)(2007), coppicing willow (2007), release of march snail (2007), creation of wetland (2014) were implemented based on monitoring results. And then appraisal of management action was discussed.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1296-1301
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• 2005

하천자연도 평가는 하천이용과 보전, 복원계획에 대한 적합성의 근거를 파악하고 이에 가치를 부여하기 위해 주로 평가가 이루어진다. 최근 많은 하천들이 자연형 공법을 적용하여 정비되고 있지만 하천 정비에 따른 실효성 검토가 제대로 이루어지지 않고 있다. 자연형 하천으로 정비된 하천의 실효성을 검토하는 하나의 방법으로 지속적인 모니터링을 통해 하천생태계의 구조와 기능을 파악하고 수집된 자료를 분석하여 공사전과 공사후 하천자연도를 평가할 필요가 있다. 본 연구에서는 GIS를 이용하여 공사전과 공사후의 하천자연도 평가를 수행하였다. 평가항목은 종단면, 횡단면, 하상구조, 하천주변, 하천수질, 식생, 어류, 조류 등 8개 부문 29개 항목을 반영하였고 공사전과 후의 자연도 평가를 비교하기 위해 공사전 모니터링을 통해 얻은 자료를 바탕으로 부문별 평가항목 7개 부문에 17항목을 평가하였다. 평가의 척도는 정량적 지수로서 $1\~5$의 점수로 하였고 하천자연도의 표현은 5등급 체계로 구분하고 가중치는 부문별로 동일하게 하였다. 본 연구의 결과는 공사전 평가지수 3.3으로 하천자연도 III등급이었으나 공사후에는 평가지수 2.7로 II등급을 나타내었다.

• Proceedings of the Korea Water Resources Association Conference
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• 2009.05a
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• pp.2138-2142
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• 2009

하천생태계의 서식처 기능을 회복하기 위해 하천의 환경적인 측면에서 건전성을 평가하여 하천환경정비의 방향을 제시하기 위해서는 하천의 자연도를 평가해야 한다. 따라서 본 연구에서는 국내.외의 하천자연도평가에 관한 방법을 조사하였다. 한편 하천의 특성은 하천 고유의 성질이므로 하천 간에 자연도를 상호 비교하는 것 보다는 하천구간별로 자연도를 평가하는 것이 타당하다. 따라서 본 연구에서는 하천별 특성을 반영하여 하천 형태와 하천 환경에 따른 하천자연도 평가 항목을 선택하고 평가항목별 가중치를 부여하기 위하여 계층분석과정(Analytic Hierarchy Process, AHP)을 적용하였다. 계층분석과정의 쌍대비교를 사용하여 하천자연도 평가항목별 상대적 중요도를 정량화하였고 지방하천인 회야강 22개 구간에 적용하여 분석한 결과, 회야강의 하천자연도는 기존 방법을 적용하는 경우 2.96점에서 가중치를 적용하는 경우 2.86점으로 산정되었다. 한편 구간별로 기존 방법과 개선된 방법의 산정결과를 비교하면, 2등급 1개, 3등급 10개, 4등급 10개, 5등급 1개에서 2등급 1개, 3등급 14개, 4등급 6개, 5등급 1개로 산정되었다. 본 연구 결과를 하천기술자가 하천환경정비계획을 수립하는 업무에 채택하는 등 실무에 적용하는 경우 매우 유용할 것이다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2000.04a
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• pp.173-178
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• 2000

Subjective correspondence among visual variables, auditory variables and vibratory feedback to a hand was experimentally examined to improve usability of a remote controller. First, we studied the correspondence among visual variables represented on a screen or auditory variables and the duration of vibratory stimulus to the subjects' hand by subjective evaluation. Subjective rating method was used in ten items; suitability, comprehensibility, ease-to-use, naturalness, variety, activity, usualness, interest, wish-to-use and feeling of pleasure. Second, to show the effects of multi-modal interface using visual sense, the sense of auditory and vibratory sense, we combined positive stereotype of visual variables and auditory variables provided with the first experiment. The results showed some stereotype between visual variables or auditory variables and duration of vibratory stimulus. Some of the variables such as size, direction of motion, hue, brightness of color and volume of sound had high correspondence with the duration of vibration.