• Proceedings of the KSME Conference
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• 2007.05a
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• pp.843-848
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• 2007

Quadruped robot is very useful mechanism for a various area. Recently, home entertainment and military robots adapted quadruped platform and useful function have been introduced. Our goal is the development of quadruped robot locomotion for any type of ground included to sloping one and irregular terrain. This paper, as a first step, deals with design and construction of quadruped robot walking on the flat ground. The most important factor of quadruped robot is stability of locomotion. At first, we introduce the developed quadruped robot based on dynamic simulation and experimental study of general gait algorithm. Finally, propose unique locomotion proper to our mechanism. Future work of this study is the performance test and analysis on the ground of various conditions and proposes the improved mechanism and gait algorithm.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1491-1494
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• 2008

Typically internal mobile LCD display modules are connected to the mobile product baseband PCB with flexible printed circuit board equipped with board-to-board connector. This solution has a drawback of limiting the product concept work to certain solutions that are based on connector size, location, flexible PCB length, bending, etc. in the display module. Also flexible printed circuit board based solutions are not completely optimized from reliability point of view, causing flex circuit board breakings. For the external displays in the PC or Home entertainment market, the cable solution is too expensive and resource demanding. The wireless solution has obvious advantages over reliability, low cost and flexibility. This paper describes a wireless audio-visual interface solution.

• Journal of Institute of Control, Robotics and Systems
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• v.14 no.4
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• pp.399-405
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• 2008

Recently, robot technology is actively going on progress to the field of various services such as home care, medical care, entertainment, and etc. Because these service robots are in use nearby person, they need to be operated safely even though hardware and software faults occur. This paper proposes a Fault-Tolerant middleware for a robot system, which has following two characteristics: supporting of heterogeneous network interface and processing of software components and network faults. The Fault-Tolerant middleware consists of a Service Layer(SL), a Network Adaptation Layer(NAL), a Network Interface Layer(NIL), a Operating System ion Layer(OSAL), and a Fault-Tolerant Manager(FTM). Especially, the Fault-Tolerant Manager consists of 4 components: Monitor, Fault Detector, Fault Notifier, and Fault Recover to detect and recover the faults effectively. This paper implements and tests the proposed middleware. Some experiment results show that the proposed Fault-Tolerant middleware is working well.

• Transactions of the Korean Society for Noise and Vibration Engineering
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• v.18 no.6
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• pp.606-611
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• 2008

Consumer's product selection measures are being shifted from the units' operational performance to overall performance. Low noise, low vibration, and low power consumption rate, etc. which used to be additional quality indices, now become vital performance factors. Especially, noise and vibration characteristics are being considered as equivalent to/or even more critical than operational performance in certain products such as office machines and home entertainment systems, which share the same space with human being's daily life. Therefore, noise reduction and sound quality improvement technology becomes an inevitable design issue for those applications. Qualitative noise characteristics of rotating polygonal disk applied to digital printer systems are presented. Overall sound pressure level change and tonal noise variation with respect to the geometrical properties of polygonal disk, operational speed, and others are briefly discussed based on experimental results.

• Proceedings of the KIEE Conference
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• 2002.11c
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• pp.489-494
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• 2002

Recently, A robot which accomplish many tasks is the universality in fixed environment. But home robot or entertainment robots has interested greatly, and the concept of service robots is outstanding newly. In special, research about the self-steering robot is increasing gradually. Also Internet has become general, many information devices and tools were connected with internet. According to such a trend, we developed the mobile robot that moves by self-localization and is controlled in the basis of internet. Our robot system will assist office workers. In this paper, we introduce mechanical feature, control system and service faculty of robot, MAIRO in an office environment.

• Proceedings of the Korean Information Science Society Conference
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• 2002.10e
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• pp.616-618
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• 2002

IEEE1394는 디지털 멀티미디어 디바이스를 위한 표준 인터페이스 프로토콜로 집안내의 엔터테인먼트 네트웍을 구성하고 있다. 홈 내의 콘트롤 디바이스와 멀티미디어 디바이스를 통하여 홈 네트웍을 구성하기 위해서는 IEEE1394와 TCP／IP를 모두 지원할 수 있는 구조가 필요하다. 본 논문에서는 IEEE1394 프로토콜 기반 서비스와 TCP 기반 서비스 사이의 상호 연동을 제공할 수 있는 구조를 제공하기 위해서 기존의 지니 시스템의 룩업 서비스를 확장하여 홈 엔터테인먼트 네트웍을 쉽게 구성할 수 있는 구조를 보인 것을 특징으로 한다. 따라서 본 논문에서 제안한 구조는 TCP／IP와 IEEE1394사이의 정보 교환을 위해 큐 메커니즘을 사용하여 IEEE1394 기기도 지니 네트웍에 손쉽게 연결되도록 하였고 이는 TCP／IP를 사용하는 지니 네트웍 기술을 확장함으로써 이루어 졌다.

• Journal of Families and Better Life
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• v.24 no.6 s.84
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• pp.147-160
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• 2006

The perceived needs and purchase experiences of college students in regard to goods and services and the relationship between the two variables were investigated. Data on 387 college studentswere analyzed to test the level of their perceived needs and purchase experiences of 43 goods and services. Results showed that respondents perceived cellular phones, going to movies and plays, books, entertainment and alcohol, which had been regarded as optional goods in the past, as highly necessary for their daily lives. On the other hand, 5 items that had been purchased by the highest number of respondents were food at restaurants, beverages at cafes, alcohol, movies and plays, and on-line avatars. The level of perceived necessity and purchase experience were positively correlated in general, although there were a few exception.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.11a
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• pp.597-600
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• 2002

새 천년이 시작하면서 자본주의의 새로운 기업 모델로 e-Biz가 각광받았다. 하지만 곧바로 사양되었으며, 이 시점에서 새로운 대안으로 떠오른 것이 바로 모바일 인터넷 비즈니스였다. M-Biz는 편재성(Ubiquity), 접근성(Reachability), 보안성(Security), 위치확인(Localiz ation), 즉시 연결성(Instant Connectivity), 개인화(Personalization)의 모바일 인터넷 장점을 이용하여 뚜렷한 수익모델로 가능해졌기 때문이다. 이런 모바일 컨텐츠 서비스는 정보제공(Information), Entertainment, 상거래(Transaction), 단문메시지 (Communication) 등을 현재 제공하고 있으며, 이러한 기능들을 현재 개발되고 있는 홈 오토메이션 시스템과 결합하여 새로운 형태의 홈 오토메이션을 기반으로 하는 모바일 서비스 지원 기법을 본 논문에서는 논하였다.

• Journal of Multimedia Information System
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• v.8 no.4
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• pp.295-300
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• 2021

Recent advances in Internet-of-Things and wearable computing have established computationally sufficient infrastructure to remove the barriers of physical locations. The recent COVID-19 pandemic has accelerated the use of remote collaboration, work-from-home, teleconferencing, online education, digital twin, and metaverse enriched with various configurations of augmented reality, virtual reality, mixed reality, and extended reality. Beyond specialized niche wearable applications in the medical and entertainment domains, we aim to identify the underlying characteristics of smartglass-enabled killer applications for everyday use. In this paper, we analyze intermediary roles in remote collaboration consisting of authoritative supervisors, synergetic collaborators, and speculative explorers. We also propose technical components for smartglass-assisted interactive remote collaboration composed of personal tracking, teleconference, and interaction components. More specifically, the application tasks of each intermediary role and objectives of three functional components are defined and elaborated.

• Proceedings of the Korea Information Processing Society Conference
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• 2007.11a
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• pp.805-807
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• 2007

컴퓨팅 환경이 유비쿼터스 환경으로 변화함에 따라 정보의 량은 증가하지만, 사용자가 이 모든 정보를 수용하기에는 한계가 있다. 그래서 유비쿼터스 환경에서는 장치 스스로 상황을 인지하고 능동적으로 처리할 필요가 있다. 본 논문에서는 블루투스 라디오 신호 세기를 기반하여 위치 인지를 하고 이를 바탕으로 이동중인 사용자에게 동적으로 멀티미디어 스트리밍 스위칭 서비스를 제공하는 u-MESSAGE(ubiquitous MEdia Stream Switcher At Genius home Entertainment) 시스템을 소개한다.