• 한국인터넷방송통신학회논문지
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• 제10권4호
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• pp.151-156
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• 2010

본 논문에서는 DVB-H 시스템의 성능측정과 적절한 단일주파수망의 셀 커버리지를 연구하기 위하여 컴퓨터를 이용한 모의실험을 수행하였다. 수행된 결과로부터 2K 전송모드가 8K 전송모드에 비하여 도플러 주파수에 강인함을 확인 할 수 있다. 본 논문의 결과는 단일주파수망 설계에 있어 부분적으로 응용될 수 있다.

• 음성과학
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• 제15권4호
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• pp.121-130
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• 2008

This paper proposes the way of improvement and system build-up for shop music broadcasting services provided by the Internet. Comparing the shop music broadcasting services and personal music broadcasting services, we propose the way of shop music broadcasting services customers prefer to. That is, such a function is provided that a user can control the broadcasting music lists a specialist provides according to the current circumstance of shop. This paper proposes the whole system such a service is possible and verifies the efficiency by experiments.

• 한국인터넷방송통신학회논문지
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• 제17권2호
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• pp.39-44
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• 2017

본 연구에서는 국내 콘텐츠 생산 및 유통방식의 급격한 변화에 따른 방송장비 구매 수요처의 절대적인 장비구매 인식을 비교하였으며 이에 수요자가 지각하는 국산 방송장비의 기술 신뢰도, 시스템 안정성 등의 정보의 정도가 장비구매에 미치는 영향을 연구모델을 통해 분석하였다. 방송 장비 수요에 관한, 기존 연구 데이터의 미진함으로 인하여 방송장비 전문가들과의 심층인터뷰와 설문조사를 병행하였다. 분석 결과로 외산장비에 비해 국내 장비의 단품구매와 시스템, Block구매의 경우가 많아 호환 경쟁력이 미흡하고 기술발전이 늦다. 국내 방송장비수요처가 인식하고 있는 국산방송 장비에 대한 선호, 만족도의 향상을 기하기 위한 기술 신뢰도 증진과 핵심 주요장비의 개발이 시급하며 소출력 송신기 안테나, 모니터장비에 국한되어있는 국산 장비의 공급을 확장하기 위한 개발이 시급하고 해외진출과 시장을 확보하기 위한 국내육성 지원도 요구된다.

• International Journal of Internet, Broadcasting and Communication
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• 제4권1호
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• pp.1-2
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• 2012

A speaker is a system which produces sound through electromechanical operations. It transforms electronic signals into audible sound signals. Almost all speakers are three dimensional. These days, many mobile electronic devices such as mobile electronic devices have become smaller and thinner. A problem with this miniaturization, however, is that the volume of speakers has also decreased. In contrast to conventional three dimensional speakers, we have invented a new type of two dimensional flexible speaker by utilizing the reverse piezoelectric effect.

• International Journal of Internet, Broadcasting and Communication
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• 제4권2호
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• pp.7-11
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• 2012

In this paper, we defined constructivism and ontology theory and associate it in ubiquitous learning. The typical ubiquitous learning involving the Context Aware Intelligent system was presented. Also the Architecture for learning environment including the key idea and technical concept is being presented in this paper. Guided with these principles and with the advancement of information and communication technology the context-awareness based on Artificial intelligence for Location based Service for ubiquitous Learning was conceptualized.

• International Journal of Internet, Broadcasting and Communication
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• 제14권4호
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• pp.96-103
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• 2022

In this paper, we define EMRA-based USN metadata to describe sensor device, sensor node, and sensor network information at the application level. And the proposed method for effectively storing and retrieving USN metadata based on EMRA uses agent technology. As the sensor metadata proposed in this paper is based on SensorML, interoperability can be maintained in the USN environment, and the metadata management system can be directly utilized for metadata management in USN middleware or applications.

• International Journal of Internet, Broadcasting and Communication
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• 제9권4호
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• pp.59-66
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• 2017

Cloud computing has evolved into a core computing infrastructure for the internet that encompasses content, as well as communications, applications and commerce. By providing powerful computing and communications capabilities in the palm of the hand everywhere with a variety of smart devices, mobile applications such as virtual reality, sensing and navigation have emerged and radically changed the patterns people live. The data that is generated is getting bigger. Cloud computing, on the other hand, has problems with system load and speed due to the collection, processing and control of remote data. To solve this problem, fog computing has been proposed in which data is collected and processed at an edge. In this paper, we propose a system that dynamically selects a fog server that acts as a cloud in the edge. It serves as a mediator in the cloud, and provides information on the services and systems belonging to the cloud to the mobile device so that the mobile device can act as a fog. When the role of the fog system is complete, we provide it to the cloud to virtualize the fog. The heterogeneous problem of data of mobile nodes can be solved by using mDBaaS (Mobile DataBase as a Service) and we propose a system design method for this.

• International Journal of Internet, Broadcasting and Communication
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• 제16권2호
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• pp.59-67
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• 2024

Current straw mushroom farming in countries with large rice growing areas has great development potential, and was once considered a way to generate additional income and reduce poverty in rural areas. However, currently most people still grow mushrooms using traditional processes, leading to low productivity and unguaranteed output quality. Currently, due to climate change and unusual weather changes, people tend to switch to growing straw mushrooms indoors. In the process of growing straw mushrooms indoors, the design of an automatic control and monitoring system is very important to ensure the growing process is carried out effectively and achieves high yields. In this paper, we propose a system that can automatically control and monitor the humidity and temperature of the indoor straw mushroom growing process and other parameters that can be monitored through a network system using Internet of Things. The control algorithm automatically adjusts the grow house equipment based on feedback from sensors to maintain an optimal environment for growing straw mushrooms. Experimental results show that the straw mushroom growing system with automatically controlled and monitored environmental parameters helps improve efficiency, reduce costs and increase the sustainability of the current straw mushroom growing industry.

• ETRI Journal
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• 제35권2호
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• pp.292-300
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• 2013

Augmented reality (AR) is a popular service in mobile devices, and many AR applications can be downloaded from app stores. As TV broadcasting has continued to integrate with the Internet, it has become an area in which the AR concept is able to reside, although in a simple form, such as an advertisement placed in the static region of a scene. There are some restrictions against TV broadcasting realizing AR since TVs are fixed devices and typically do not have GPS, geomagnetic, or acceleration sensors, which are standard equipment in mobile devices. However, the desire to experience AR on a large TV screen has triggered research and development for an ideal AR business model and service type. This paper introduces several use cases for augmented broadcasting services and also presents an augmented broadcasting metadata scheme designed for a broadcasting environment. We also verify some of the use cases and an augmented broadcasting metadata scheme in an implemented augmented broadcasting system based on a hybrid TV platform.

• International Journal of Internet, Broadcasting and Communication
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• 제8권1호
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• pp.1-6
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• 2016

Keeping a system in stable state is one of the important issues of control theory. The main goal of our basic research is stability of unmanned aerial vehicle (quadrotor). This type of system uses a variety of sensors to stabilize. In control theory and automatic control system to stabilize any system it is need to apply feedback control based on information from sensors. Our aim is to provide balance based on the 3D spatial information in real time. We used PID control method for stabilization of a seesaw balancing system and the article presents our experimental results. This paper presents the possibility of balancing of seesaw system based on feedback information from stereo vision system only.