• Title/Summary/Keyword: 인접관계

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RAG-based Hierarchical Classification (RAG 기반 계층 분류 (2))

  • Lee, Sang-Hoon
    • Korean Journal of Remote Sensing
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    • v.22 no.6
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    • pp.613-619
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    • 2006
  • This study proposed an unsupervised image classification through the dendrogram of agglomerative clustering as a higher stage of image segmentation in image processing. The proposed algorithm is a hierarchical clustering which includes searching a set of MCSNP (Mutual Closest Spectral Neighbor Pairs) based on the data structures of RAG(Regional Adjacency Graph) defined on spectral space and Min-Heap. It also employes a multi-window system in spectral space to define the spectral adjacency. RAG is updated for the change due to merging using RNV (Regional Neighbor Vector). The proposed algorithm provides a dendrogram which is a graphical representation of data. The hierarchical relationship in clustering can be easily interpreted in the dendrogram. In this study, the proposed algorithm has been extensively evaluated using simulated images and applied to very large QuickBird imagery acquired over an area of Korean Peninsula. The results have shown it potentiality for the application of remotely-sensed imagery.

A Study on Ice Area and Temperature Change in River on Winter Season Using Classification Method of Satellite Image (위성 영상의 분류 기법을 활용한 겨울철 하천의 얼음 면적과 기온 변화 비교 연구)

  • Park, Sungjae;Kim, BongChan;Lee, Chang-Wook
    • Korean Journal of Remote Sensing
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    • v.37 no.6_1
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    • pp.1599-1610
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    • 2021
  • The natural environment and local ecosystem change depending on various factors, but among them, the change in water temperature is one of the major factors affecting the surrounding environment in the river ecosystem. However, research on water temperature change have not been actively conducted to date compared to the effect of water temperature on the river environment. Therefore, this study intends to study the change in water temperature from 2015 to 2021 through the change in the area of winter ice in the Hongcheon River. Optical satellite images were classified by referring to the field survey results, and the SAR satellite imagestried to overcome the limitations of the input data by using the GLCM texture analysis method. After verifying the accuracy of all images used, the calculated monthly average ice area was compared with the temperature data of the adjacent AWS. It was found that there is a correlation between water temperature and ice area, and the results of this study can be used to study environmental changes in small-scale rivers that are difficult to access or do not have systems in place.

Analysis of Tendency and Characteristics in Armed Conflict in Post-Cold War Era: on the basis of UCDP (탈냉전 후 무력갈등의 추세와 특징에 관한 분석: UCDP 자료를 중심으로)

  • LEE, CHULKI
    • International Area Studies Review
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    • v.18 no.3
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    • pp.269-291
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    • 2014
  • The purpose of this article is to analyze the tendency and characteristics in armed conflict in post-Cold War era on the basis of Uppsala conflict data program(UCDP) datasets. The collapse of bipolarity and the end of cold War proved a watershed in the dynamics of international conflict. The major shift in the nature of conflict has been away from interstate conflict, leaving intrastate conflict. Major powers have acted carefully against each other and been willing to understand the interests of other to avoid military confrontation and crash. As the means of termination for armed conflict, there is a stronger emphasis on the peace settlement like peace agreement and ceasefire agreement than military victory. Many intrastate conflicts become internationalized, through the involvement of diaspora communities, or regionalized through a spillover effect into neighboring countries. Since the end of the Cold War, the UN has taken a much more active role in conflict management and conflict resolution.

Ancient Wooden Shoes Research of Korea, China and Japan (한·중·일 삼국의 고대 나막신 연구)

  • In, Byung-Sun
    • Korean Journal of Heritage: History & Science
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    • v.38
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    • pp.109-128
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    • 2005
  • We dealt with the Wooden Shoes as a tool in the first chapter. You can doubt about the Wooden Shoes as a tool, which they were in Japan and China not Korea, strictly speaking, if they are real shoes or not. But anyway they had components of the Wooden Shoes in shape(form) or function, so it was expressed in the head part, cause of the possibility that Wooden Shoes as a tool are the previous stage of Wooden Shoes as shoes, though are not identified yet. In the second chapter, we dealt with the Wooden Shoes as shoes fundamentally. Recently, the Wooden Shoes of Shilla and Baekje were dug out each in Kyungsan-city Im-dang-dong and Buyeo-gun Neungsan-lee. Even though they were contemporary neighborhood countries, they had much differences in their forms of Wooden Shoes. While the Wooden Shoes of Baekje and the ancient Wooden Shoes of Japan are surprisingly alike. So we have tried to identify with the politic and diplomatic relation of Korea and Japan, through various literature records.

A Dynamic Investigation of iBeacon Adoption at Tourism Destination (관광지에서의 iBeacon 도입에 대한 동태적 분석)

  • Choedon, Tenzin;Lee, Young-Chan
    • Journal of Industrial Convergence
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    • v.16 no.2
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    • pp.1-14
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    • 2018
  • The interconnectedness of all things is continuously expanding. For example, bluetooth low energy (BLE) beacons are wireless radio transmitters that can send an identifier to nearby receivers and trigger a number of applications, from proximity marketing to indoor location-based service. iBeacon technology which is one of the newest technologies in the smart tourism field, is reckoned as being very useful for travelers in enhancing the experience with visiting places. However, there is consequently not much existing research yet about the connection between iBeacon technology and tourism destination. Considering that, this study analyzes the adoption of iBeacon in tourism destination, this study examine the interrelationships and feedback structures of key factors in iBeacon adoption. To serve the purpose, this study used system dynamics approach to develop a model of iBeacon adoption in tourism destination. The analysis results showed that the concept of 'Social Influences' is one of the significant predictors for individual's intention behavior to accept iBeacon, and word of mouth (WOM), subjective norm, privacy concern, and perceived usefulness are key factors influencing the iBeacon adoption.

Knowledge Structures to Simulate the Spatial Behavior of Intelligent Virtual Humans (지능형 가상인간의 공간적 행동을 모사하기 위한 지식구조)

  • Hong, Seung-Wan;Park, Jong-Hee
    • The Journal of the Korea Contents Association
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    • v.20 no.12
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    • pp.230-240
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    • 2020
  • To develop a virtual world-based immersive tutoring system, we would like to develop a simulation in the spatial aspect to maximize the diversity and realism of the situation. This implementation requires the modeling of virtual space as well as the knowledge and intelligent thinking functions of virtual humans. First, information structures are needed to simulate the hierarchical and multifaceted composition of space and the corresponding knowledge of virtual humans. Specifically, four structures for 2.5D spatial distribution expression, complex spatial relationship expression, object expression, and temporal and spatial representation of events are developed respectively. It then uses these expressed knowledge to develop the spatial thinking function of virtual humans needed to make spatial movement. In general, events have a chain effect on adjacent or connected objects through force, resulting in a variety of situations and reflected in the planning of the next action by the virtual humans involved. For this purpose, the development of events according to historical trends is recorded on the representation structure of time and space. It embodies typical events to demonstrate the feasibility of independent behavior in complex spaces among virtual people.

Assessment of Overconsolidation Ratio by Depth of Soft Ground: A Case Study in South Korea (국내 연약지반의 심도별 과압밀비 산정에 관한 사례연구)

  • Lee, Jong-Young;Han, Jung-Geun
    • Journal of the Korean Geosynthetics Society
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    • v.20 no.4
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    • pp.9-18
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    • 2021
  • In this study, the overconsolidation ratio (OCR) of soft clay soil was calculated by conducting an indoor physical experiment and a dynamics test using undisturbed soil samples from a soft clay soil field in South Korea. The OCR by depth was predicted by comparing the experimental results with the existing empirical equations. Methods using the liquidity index and the existing empirical equation by the Naval Facilities Engineering Systems Command (NAVFAC) were examined, and the results were compared with the actual measured values. The method using the liquidity index was found to be suitable for estimating the rough OCR of the ground. However, the effect of drying was not considered for the ground above the groundwater level. Therefore, an equation for the correlation equation between the depth and OCR of each region, including the ground above the groundwater level, was proposed. The proposed equation was applied to the OCR prediction of the adjacent area. The predicted values in the area composed of clay (CL, CH) were found to be in good agreement with the actual values. In the region composed of silt (ML), however, the predicted values were not consistent with the actual values. This suggests that the sedimentation and compositional characteristics, rather than the engineering characteristics of the soil, are important factors that affect the OCR prediction.

A Study on vitalization of the Pohang Yeongil Port and its hinterland in the post Covid-19 pandemic (포스트 코로나 시대 지역거점항인 포항영일만항과 배후단지 활성화 방안에 관한 연구)

  • Kwak, Dong-Wook;Lee, Sung-Woo;Kim, A-Rom;Seo, Young-Joon
    • Journal of Korea Port Economic Association
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    • v.38 no.1
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    • pp.73-86
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    • 2022
  • This study aims at investigating measures to vitalize the Pohang Yeongil New Port and its hinterland in the context of the post Covid-19 pandemic. To identify appropriate strategies, an SWOT analysis combined with fuzzy-AHP(Analytic Hierarchy Process) was applied for strategical priority. Among the SWOT factors, weaknesses and threats were found to be critical. At a more detailed level, the strategic priorities were given to insufficient infrastructure (W), neighboring ports (T), insufficient shipping network (W), low service level (W) and South-North Korea relationships (T). Given these results, several strategies to overcome core weaknesses and threats of the Pohang Yeongil Port were suggested. The results of this study may provide valuable insights for port policy makers.

Determining Intervention Timing for People with Intellectual Disabilities during Virtual Reality-based Barista Training

  • Jo, Junghee
    • Journal of the Korea Society of Computer and Information
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    • v.27 no.11
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    • pp.165-172
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    • 2022
  • This paper proposes a method to derive the time points for helpful intervention based on conclusions drawn from a previous study which collected data during barista training performed by students with developmental disabilities. To identify this intervention time, this study utilized distance information between the hand of a student and each barista tool in a virtual reality space. If the cumulative distance from a student's hand to the key barista tool is relatively longer than the cumulative distance to other barista tools, it is highly likely that the student is not using the key barista tool, which must be used to successfully complete the given task. In other words, the distance information signals the task is not being properly performed and represents the intervention time to help the student. As a result of verifying a hypothesis through statistical analysis, this study found that the relationship between the success or failure of a student's training and the cumulative distance between the student's right hand and the key barista tool was statistically significant, but not for the left hand.

Scene Change Detection Algorithm for Video Abstract on Specific Movie (특수 영상에서 비디오 요약을 위한 장면 전환 검출 알고리즘)

  • Chung, Myoung-Beom;Kim, Jae-Kyung;Ko, Il-Ju;Jang, Dae-Sik
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.3
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    • pp.65-74
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    • 2009
  • Scene change detection is pretreatment to index and search video information in video search system, and it is very important technology for overall performance. Existing scene change detection used single characteristic of pixel value difference, histogram difference, etc or mixed single characteristics that have complementary relationship. However, accuracy of those researches is very poor for special video such as infrared camera, night shooting. Therefore, this paper is proposed the method that is mixed color histogram and at algorithm for scene change detection at the specific movie. To verify the usefulness of a proposed method, we did an experiment which used color histogram only and KLT algorithm with color histogram. In result, evaluation index of proposed method is improved about 11.4% at the specific movie.