• Journal of the Korean Institute of Educational Facilities
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• v.22 no.1
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• pp.47-57
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• 2015

This study aimed to identify secondary school students' perceptions of school spaces by researching their place preferences and the reasons for them. For the purpose, we analyzed students' written statements regarding places they like and dislike at school, which were collected from 836 middle and 1,100 high school students enrolled at 4 middle and 4 high schools, respectively. Data were transcribed, encoded, and analyzed so as to be clustered to themes revealing the students' senses of places at school. The results are as follows: (1) for middle school students, the most preferred places had to do with physical activities, including playground, auditorium, gymnasium etc., whereas high school students preferred indoor places such as classrooms; (2) the reasons for like-places were categorized into three themes: functions (physical, social, learning, and everyday activities), emotions (belonging, healing, and aesthetics), and physical characteristics; (3) both middle and high school students regarded restroom as the place that they disliked most; (4) the reasons for dislike-places included physical conditions, atmosphere, person-related, subject-related, and circumstances such as the happening of violence or punishment. These may provide educators, parents, school architects and administrators with practical considerations needed for making school a better place for students at secondary schools.

• Journal of the Korean association of regional geographers
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• v.19 no.4
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• pp.697-711
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• 2013

Hwaseong serial murders are not now having any significant concern either with Hwaseong City or Dongtan New Town, a region in Hwaseong City, both spatial and temporal manners. However, despite that, people have come to see Hwaseong City with negative ideas as the mass media drove the people to do so. In this study, how films and newspaper articles have created those negative images of Hwaseong City was investigated and afterwards, residents and students living in Dongtan New Town had interviews on what they think about the negative regional images. The study, then, worked on a mental map and others based on what it learned from the interviews. Regional identity confusion is now being discovered out of the people's resistance against the negative images of the city and through such research process described before, the study discussed this regional identity confusion caused by living as residents in Hwaseong and living as residents in Dongtan New Town. In addition, the study revealed sense of place of Dongtan New Town and aspects of the regional identity confusion with this Dongtan New Town growing both with symbolic meanings as a place of murders, an awful crime, and spatial meanings as another place of dynamic developments and improvements.

• Journal of Korean Society of Forest Science
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• v.102 no.1
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• pp.74-81
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• 2013

Research has shown that attitudes of young people toward forest and the relationship between the attitudes and aggression in the forest. Results from factor analysis on forest attitude scale of young people showed two factors; enjoying the forest, importance and usefulness of forest. Based on the comparison of two means(factors) young people recognized that forest was important and had to be protected but, little perceived as interesting. Also this study showed that the forest attitude was negatively correlated with aggression, especially in physical and verbal aggressive behavior.

• The Journal of the Korea institute of electronic communication sciences
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• v.15 no.1
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• pp.139-146
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• 2020

The disadvantage of the general robot cleaner is that it works only on the designated route, so it is impossible to clean the place outside the designated route. Therefore, in this study, the direction control methodology for searching the place other than the designated route based on the finger recognition technology was studied to compensate for the shortcomings of the existing cleaner. Raspberry Pi was used as the main controller and Open CV program was used to recognize the number of fingers. To verify the validity of the proposed methodology, a finger recognition algorithm was implemented using Python language, and as a result of adopting the Logitech C922, the success rate was 100% at 90cm and 70% at 110cm, respectively.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2005.11a
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• pp.195-198
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• 2005

최근 실내 환경에서 영상 정보를 사용하여 로봇이 서비스를 제공하기 위한 연구가 활발하다. 과거 영상 처리 접근 방법은 산업 환경과 같은 예측 가능한 환경을 바탕으로 미리 정의된 기하학적 모델을 통해 상황을 인식하였기에, 이를 실내 환경과 같은 가변적인 환경에 적용할 시 성능이 저하된다. 이에 지식을 기반으로 불확실성을 해결하여 정확도를 향상 시킴으로써 영상 인식 성능을 높이기 위한 다양한 연구가 진행되어 왔다. 본 논문에서는 실내에서 활동하는 서비스 로봇의 물체인식 성능을 향상시키기 위해, 대상 물체가 다른 물체에 의해서 가려져 있는 경우 대상 물체의 존재 여부를 추론하기 위한 베이지안 네트워크 모델링 방법을 제안한다. 제안하는 방법은 작은 단위로 설계된 베이지안 네트워크들을 상황에 따라 결합하여 추론 모델이 구성되게 하였고 물체간의 관계를 효과적으로 표현하고 초기 확률 값을 단일하게 유지하기 위해 제안된 확률 값 설정 방법을 사용하였다. 실험은 물체 관계를 추론하는 모듈의 성능을 검증하기 위해 수행되었는데, 5가지 장소에서 82.8$\%$의 정확도를 보여주었다.

• Journal of the Korean Institute of Landscape Architecture
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• v.23 no.3
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• pp.15-28
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• 1995

공원녹지가 군시내에서 수행하고 있는 역할에 대해 학자들은 크게 '주민을 위한 위락공간으로서의 역할' '도시구조를 이루는 한 요소로서의 역할' 그리고 '도시 생태계의 기반으로서의 역할'등 크게 세가지로 구분하고 있다. 본 연구는 대도시 주민들이 인식하고 있는 도시공원녹지의 역할을 그들의 이용과 가치관을 중심으로 설문조사에 기초한 결과의 일부이다. 조사에 의하면, 주민들은 대개 공원녹지를 그들의 위락공간을 위한 장소로서 인식하고 그 역할에 동의하고 있는 것으로 나타났다. 최근, 도시·조경계획분야에서 크게 논의되고 있는 생태학적 개념에 근거한 도시공원녹지의 '도시내 자연'으로서의 역할에 대한 주민의 인식이 전문가들의 열의에 배해 많이 높지 않음을 보여 주었다. 그러나 이는 위락공간으로서 역할 다음으로 중요도가 인식되고 있는 만큼 도시내 자연으로서의 공원녹지 역할을 높이기 위해서 학자들 사이에 구체적인 논의와 실증적인 연구가 뒤따라야 할 뿐만 아니라 주민들의 의사와 합의가 있어야 할 것으로 생각된다. 한편 도시공원녹지의 역할에 대해서는 도시주민의 사회적인 변수 특히 성, 교육수준, 임금수준 등에 따라 차이가 있는 것으로 나타나 도시공원녹지 계획시 이들 변수에 대한 고려가 있어야 할 것이다.

• Journal of the Korean Society for information Management
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• v.38 no.2
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• pp.305-336
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• 2021

This study explored the user's information needs and information behavior for the development of academic library services. The content analysis of qualitative data showed that the in-depth interview participants have six types of information needs such as 'suitability, up-to-dateness, uniqueness, reliability, practicality, and convenience' while going through societal, educational, and research-related changes. Interview participants solved their information needs by acquiring the resources necessary for each individual's task through information behaviors using information media, human resources and the places. Each participant tried to solve his/her information problem through individual efforts based on their different media and information utilization capabilities. Based on the analysis, this study presented four directions in the development of academic library services. They are an personalized information literacy service, a space to meet the characteristics of information needs, an infrastructure platform for exchanging human resources, and an accessible support service for utilizing information media.

• Fire Science and Engineering
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• v.30 no.5
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• pp.1-8
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• 2016

Safety management in hazardous areas with potentially explosive gas atmospheres (here in after referred to as hazardous areas) in large scale facilities dealing with combustible or flammable materials at home and abroad is very important (significant) for the coexistence of the company and local society based on business continuity management (BCM) and reliance. For the safety management in hazardous areas, two systems are mainly used: (1) the control system for the prevention of combustible or flammable substances and (2) the explosion proof system for the elimination of ignition sources when flammable gases are leaked to inhibit the transition to fire or explosion accidents. While technology and regulations on explosion proof facilities or devices for electrical ignition sources are well developed and defined, those for thermal ignition sources need to be more developed and established. In this study, the internal combustion engine in hazardous areas was investigated to determine the risk of ignition. For this purpose, document searches were conducted on the relevant international standards and accidents cases and risk analysis reports. In addition, this study assessed the application cases of the diesel engine's safety equipment, such as spark arresters regarding the site of process safety management (PSM) system in central Korea. To practically apply these results to the hydrocarbon industry, the safety management method for explosion prevention in hazardous areas was provided by risk identification for ignition sources of internal combustion engines, such as diesel engines.

• Journal of Digital Contents Society
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• v.7 no.2
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• pp.117-124
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• 2006

In ubiquitous computing environment, a user can access their personalized services at anytime, anywhere, through any possible mobile or fixed terminals in a secure way. If the user wants to move to a different location, they need to stop the video play at the current location and makes a new request at the new location. As well, the user needs to manually search for the last frame to be seen at the previous location. In this paper, we proposed an implementation of multimedia contents streaming service mobility by user's location tracking. User can play video seamlessly while moving from one machine to another along the user's moving trail.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.215-216
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• 2023

군사 목적으로 사용되던 드론이 일반 사용자를 위한 범용 드론으로 활용 분야가 확장됨에 따라, 국방 및 운송, 물류, 농업과 같은 다양한 분야에서 활용되는 실정이며, 이와 관련된 산업의 발전에 기여하고 있다. 그러나 급격한 발전으로 인하여, 드론의 안전성은 고려하지 못한 한계점이 존재하였고, 이는 드론에서의 다양한 보안위협으로 나타났다. 본 논문에서는 4차 산업 혁명 시대의 핵심 기술인 드론의 안전성을 향상시키기 위한 목적으로, 드론의 신규 취약점을 발굴하고 실증하였다. 실험을 위하여, 최근 출시된 G 제품을 대상으로, 드론에서 발생 가능한 다양한 취약점 중 하나인 GPS 스푸핑 공격을 시도하였으며, 실험 결과, GPS 좌표를 변조함으로써, 비행이 가능한 구역에서 비행 금지 구역으로 인식하도록 좌표를 조작하였으며, 비행 금지 구역으로 인식한 드론은 준비된 동작에 따라, 강제로 착륙시키거나 다른 장소로 이동시키는 것이 가능하다. 본 논문의 결과는 드론의 안전성을 향상시키기 위한 참고 자료로 활용될 것으로 사료된다.