• International Journal of Internet, Broadcasting and Communication
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• v.11 no.1
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• pp.8-16
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• 2019

As smartphone users grow, mobile operators are trying to standardize and commercialize Rich Communication Suite (RCS), which is a next-generation messaging service, so that it can replace legacy messaging services. However, it is not enough to spread RCS widely to the users only by publishing an RCS app. To increase the use of RCS, a web-based open API for common RCS capabilities is needed. By using the API, Internet-based developers can create applications that make use of the RCS capabilities with less effort and time. This paper proposes a lightweight Comet-based open API to allow mobile operators to expose useful information and capabilities to application developers. The system architecture of the open API framework and call flow between relevant nodes are defined. In addition, examples of protocol translations on the framework are provided.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.635-637
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• 2016

The purpose of this study was to apply other programming tools such as robots parish. The robot was utilized for Lego Mindstorms NXT. Programming tools were used to block generic programming tools were used in the NXT-G, was used as a simulation programming tools MSRDS, mobile App Inventor is a programming tool (App Inventor). It can lead to interesting effects of learning and learning based on three programming tool above.

• Journal of information and communication convergence engineering
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• v.16 no.4
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• pp.213-220
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• 2018

With the exponential developments of social network, their fundamental role as a medium to spread information, ideas, and influence has gained importance. It can be expressed by the relationships and interactions within a group of individuals. Therefore, some models and researches from various domains have been in response to the influence maximization problem for the effects of "word of mouth" of new products. For example, in reality, more than two related social groups such as commercial companies and service providers exist within the same market issue. Under such a scenario, they called social adversaries competitively try to occupy their market influence against each other. To address the influence maximization (IM) problem between them, we propose a novel IM problem for social adversarial players (IM-SA) which are exploiting the social network attributes to infer the unknown adversary's network configuration. We sophisticatedly define mathematical closed form to demonstrate that the proposed scheme can have a near-optimal solution for a player.

• Journal of Integrative Natural Science
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• v.14 no.2
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• pp.35-40
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• 2021

In this paper, we proposed a multi-subject-level sentiment analysis model for user reviews using the Latent Dirichlet Allocation (LDA) method targeting user-generated content (UGC). Data were collected from users' online reviews of hotels in major tourist cities in the world, and 30 hotel-related topics were extracted using the entire user reviews through the LDA technique. Six major hotel-related themes (Cleanliness, Location, Rooms, Service, Sleep Quality, and Value) were selected from the extracted themes, and emotions were evaluated for sentences corresponding to six themes in each user review in the proposed sentiment analysis model. Sentiment was analyzed using a dictionary. In addition, the performance of the proposed sentiment analysis model was evaluated by comparing the emotional values for each subject in the user reviews and the detailed scores evaluated by the user directly for each hotel attribute. As a result of analyzing the values of accuracy and recall of the proposed sentiment analysis model, it was analyzed that the efficiency was high.

• Wind and Structures
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• v.32 no.5
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• pp.501-508
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• 2021

The turbine industry demands a reliable design with affordable cost. As technological advances begin to support turbines of huge sizes, and the increasing importance of wind turbines from day to day make design safety conditions more important. Wind turbines are exposed to environmental conditions that can affect their installation, durability, and operation. International Electrotechnical Commission (IEC) 61400-1 design load cases consist of analyses involving wind turbine operating conditions. This design load cases (DLC) is important for determining fatigue loads (i.e., forces and moments) that occur as a result of expected conditions throughout the life of the machine. With the help of FAST (Fatigue, Aerodynamics, Structures, and Turbulence), an open source software, the NREL 5MW land base wind turbine model was used. IEC 61400-1 wind turbine design standard procedures assessed turbine behavior and fatigue damage to the tower base of dynamic loads in different design conditions. Real characteristic wind speed distribution and multi-directional effect specific to the site were taken into consideration. The effect of these conditions on the economic service life of the turbine has been studied.

• Annual Conference of KIPS
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• 2013.05a
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• pp.714-717
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• 2013

스마트폰의 대중화로 현재 앱스토어에는 다양한 어플리케이션들이 나오고 있다. 이와 같이 급속하게 발전하는 시대임에도 불구하고 모바일디바이스에서 웹페이지 또는 어플리케이션 으로 확인 할 수 있는 표준정보의 부재가 심각하다. 본 논문에서는 확인하기도 힘들고 활용하기도 어려운 기술표준 관련 정보를 공공안내그림표지 OpenAPI를 활용하여 보다 쉽게 이용 가능한 iOS 기반 스마트폰 어플리케이션을 설계 및 구현한다.

• Annual Conference of KIPS
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• 2013.05a
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• pp.268-271
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• 2013

CCTV는 사람들 생활에서 없어서는 안 되는 유용한 존재로 자리매김 했다. 가장 큰 장점은 범죄 수사과정에서 유전자나 지문감식에 견줄 만큼 기여도가 크다는 점이다. 폭력 및 범죄를 해결하는데 유용하게 쓰이고 있고 날로 발전하고 있는 상황이다. 본 연구에서는 최근 공간정보기술의 발달에 따라 여러 분야에 공간 정보 기반의 관제시스템이 운영 중이거나 추진 중에 있으며, 지능형 영상감시를 위한 동향과 CCTV 설치에 따른 합법성과 프라이버시 보호에 대해 연구를 한다.

• Annual Conference of KIPS
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• 2013.11a
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• pp.1540-1543
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• 2013

최근 자동차 관련 연구 분야 중 안전사고 예방에 대한 관심이 높아짐에 따라 안전지능형 기술들의 연구가 활발히 이루어지고 있다. 졸음운전과 같이 운전자의 의지와 상관없는 무의식적인 차선 이탈은 중앙선 침범으로 이어져 대형 사고를 유발할 가능성이 크다. 이와 같은 요인들은 의식적인 상황에서의 차량의 통제를 방해하고 결국 예기치 않은 차선 이탈로 연결될 수 있다. 따라서 본 논문에서는 차선 이탈 여부를 미리 판단하여 주행차선을 이탈하기 전에 운전자게에 알려줌으로써 운전자의 안전을 향상 시켜주며 자동차 안전사고 예방기술에 관련하여 차선검출과 차선이탈경고시스템 알고리즘을 설계하였다.

• Annual Conference of KIPS
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• 2013.05a
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• pp.511-513
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• 2013

스마트 폰이 나날이 발전함에 따라 우리 삶은 스마트 폰으로 무엇이든 가능하게 되었다. 다른 디지털기기의 기능을 흡수한 것은 물론이고 이제는 우리 생활의 여러 부분에서 스마트 폰을 활용하고 있는데 특히 최근에 NFC를 탑재한 스마트 폰이 보급되면서 NFC를 활용한 서비스가 주목 받고 있다. 본 논문에서는 모바일 RFID의 한 방식인 NFC 기술에 대해 알아보고 NFC 기반 서비스의 국내외 사례들과 향후전망에 대해 제안하고자 한다.

• Annual Conference of KIPS
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• 2013.11a
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• pp.897-900
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• 2013

개인정보 유출 등의 사례가 사회적 이슈로 대두됨에 따라 개인정보 보호에 대한 중요성이 더욱 부각될 것임을 보여주고 있다. 특히, 컨택센터의 경우는 고객정보에 접근할 수 있는 인가자의 수가 다른 기업들에 비해 월등히 많기 때문에 컨택센터의 특성을 고려한 개인정보 보호기술이 적용되어야 한다. 본 연구에서는 IP Contact Center의 특징과 개인정보 보호 방안의 취약점에 대해 알아보고 기존의 시스템 내 개인정보보호기술 적용방안을 제안한다.