• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권3호
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• pp.1189-1204
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• 2018

Detecting and capturing 3D human structures from the intensity-based image sequences is an inherently arguable problem, which attracted attention of several researchers especially in real-time activity recognition (Real-AR). These Real-AR systems have been significantly enhanced by using depth intensity sensors that gives maximum information, in spite of the fact that conventional Real-AR systems are using RGB video sensors. This study proposed a depth-based routine-logging Real-AR system to identify the daily human activity routines and to make these surroundings an intelligent living space. Our real-time routine-logging Real-AR system is categorized into two categories. The data collection with the use of a depth camera, feature extraction based on joint information and training/recognition of each activity. In-addition, the recognition mechanism locates, and pinpoints the learned activities and induces routine-logs. The evaluation applied on the depth datasets (self-annotated and MSRAction3D datasets) demonstrated that proposed system can achieve better recognition rates and robust as compare to state-of-the-art methods. Our Real-AR should be feasibly accessible and permanently used in behavior monitoring applications, humanoid-robot systems and e-medical therapy systems.

• 한국정보과학회논문지:시스템및이론
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• 제27권3호
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• pp.300-312
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• 2000

내장 실시간 시스템은 그 응용 분야가 매우 다양하며 그에 따라 실시간 처리와 신뢰도 보장에 대한 요구 또한 다양하다. 이러한 내장 실시간 시스템의 효율적인 개발과 실시간성 및 신뢰도 보장을 위해서는 적절한 실시간 모델이 필요하다. 최근 들어 객체지향 모델과 실시간 시스템을 접목시키는 실시간 객체 모델에 대한 연구가 활발하다. 본 논문에서 제안하는 dRTO (dependable Real-Time Object) 모델은 내장 실시간 시스템의 다양한 요구사항을 지원할 수 있도록 객체지향 개념, 실시간 개념, 신뢰성 개념 등을 단일 모델에 수용한다. 그리고 이 3 가지 기본 개념을 지원하기 위해서 5 가지 원시 클래스를 제공한다. dRTO 모델의 특징은 다음과 같다. 첫째, 객체의 시간 제약사항은 물론 객체 간의 상호작용과 관련된 시간 제약을 효율적으로 모델링하고 구현할 수 있도록 해준다. 둘째, 내장 시스템을 구성하는 하드웨어, 응용 소프트웨어, 커널 등을 하나의 틀 안에서 모델링할 수 있다. 셋째, 결함 감지 및 처리에 관해 명시적으로 표현할 수 있다.

• 제어로봇시스템학회논문지
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• 제14권11호
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• pp.1117-1123
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• 2008

This paper implements dual-kernel system using standard Linux and real-time embedded Linux for the real-time control of intelligent robot systems. Such system provides more useful services including standard Linux thread that is easy to implement complicated tasks and real-time tasks for the deterministic response to velocity control. Here, an open source real-time embedded Linux, XENOMAI, is ported on embedded target board. And for interfacing with motor controller we adopted a real-time serial device driver. The real-time task was implemented with a priority to keep the cyclic control command for trajectory control. In order to validate deterministic response of the proposed system, the performance measurement of the delay in performing trajectory control with feedback loop is evaluated with non real-time standard Linux. The proposed software architecture is anticipated to take advantage of features in both standard Linux and real-time operating systems for the intelligent robot systems.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2000년도 제15차 학술회의논문집
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• pp.191-191
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• 2000

Hydraulic servo system is difficult to be made up and each component is very expensive, it takes long for actual system to make and test and it costs a high price. Because of these characteristics of hydraulic servo system, a real time simulator that could describe behavior of real system is highly demanded, without composing real hydraulic system. So, many studies have been (lone on these subjects and many simulators are developed with superiority. Since the nonlinearity of a hydraulic system common simulator have composed of many calculative times byusing DSP(Digital Signal processing) and have made it possible to find the situations of the system in real time, calculating hydraulic simulation and controller separately. In this study, we suggest real-time simulator that could describe real system without ordinary DSP card. This simulator is composed of 80196kc and personal computer. DSP card that has calculated complex numerical equation is supplanted by personal computer and 80196kc generates control signals independently out of the personal computer. In all process, personal computer is synchronized with one-board microprocessor within sampling time in the closed loop system. This makes it possible to be described in hydraulic servo system in real time. And to make a comparison between the result of the real-time simulator and a hydraulic servo system.

• International journal of advanced smart convergence
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• 제12권1호
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• pp.130-139
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• 2023

With the increasing popularity of computer-generated virtual influencers, the trend is rising especially on social media. Famous virtual influencer characters Lil Miquela and Imma were all created by CGI graphics workflows. The process is typically a linear affair. Iteration is challenging and costly. Development efforts are frequently siloed off from one another. Moreover, it does not provide a real-time interactive experience. In the previous study, a real-time graphic workflow was proposed for the Digital Actor Hologram project while the output graphic quality is less than the results obtained from the CGI graphic workflow. Therefore, a real-time engine graphic workflow for Virtual Influencers is proposed in this paper to facilitate the creation of real-time interactive functions and realistic graphic quality. The real-time graphic workflow is obtained from four processes: Facial Modeling, Facial Texture, Material Shader, and Look-Development. The analysis of performance with real-time graphical workflow for Digital Actor Hologram demonstrates the usefulness of this research result. Our research will be efficient in producing virtual influencers.

• 한국주거학회논문집
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• 제15권4호
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• pp.45-54
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• 2004

This study systematized synthetically to use internet GIS and real estate appraisal method in computing system for the real estate decision. First, indicated the method of using GIS and databases to appraise the real estate by using the cost approach. Second, used the artificial neural network to predict the change of land prices and the artificial neural network convinced us that it indicates easily the result of land prices without complicated processes. Third, examined land prices using the artificial neural network but there is limits for the land price prediction because of difficult data gathering. also, this study may heighten information levels of the real estate field according to 21th century information level if use actively a internet, information users who should pay much moneys in existent real estate decisions may can approach easily.

• 한국IT서비스학회지
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• 제12권2호
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• pp.73-84
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• 2013

The development of the information on the internet brought a lot of changes in the real estate market. Because the real estate has local distinctiveness and individuality household who want to move must to visit place for housing information. But now household use internet real estate information at every decision-moving step and that is able to reduce not only the cost of real estate information but also social benefit like $CO_2$ emissions reduction effect. In this study, I analyzed the effect of $CO_2$ emissions reduction with Seoul household residential mobility data when household take informations from internet real estate site. As increasing a single family who is good at internet service, the effect of $CO_2$ reduction from the development of the Internet real estate information has more increased.

• 전력전자학회논문지
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• 제6권4호
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• pp.369-375
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• 2001

본 논문은 실시간 wpir 커널 환경 하에서의 이중 실시간 스케쥴링을 설계한다. 본 논문에서 제안한 이중 실시간 스케쥴링 설계는 실시간 제약 조건인 인터럽트 지연 시간, 스케줄링의 정확성, 메시지 전달시간을 만족하기 위하여 실시간 커널에서는 실시간 태스크 처리와 인터럽트 처리, 타이밍을 처리하도록 하였고 비 실시간 커널은 일반적인 태스크를 처리하도록 한다. 또한 태스크들의 충돌 시 혼합 우선 순위를 고려한 최적의 스케쥴링을 수행한다. 즉, 비 실시간 커널은 성적 우선 순위 스케쥴링을 수행하고, 실시간 커널은 동적 우선 순위 변형 스케쥴링인 최소 여유시간 우선 기반의 최소 선점을 갖는 스케쥴링 알고리즘을 수행한다. 그리고 기존의 실시간 커널인 RT-Linux 0.5a, QNX 4.23A와 제안한 실시간 커널이 인터럽트 지연, 스케줄링 정확성, 메시지 전달시간 등을 비교 qnstjrgkadmfhTJ 실시간 제약조건을 만족함을 보인다.

• 제어로봇시스템학회논문지
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• 제5권1호
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• pp.115-121
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• 1999

Advanced digital computer technology enables the computer-based controllers to replace the traditional analog controllers used in factory automations. This replacement, however, brings up the side effects caused by the quantization error and non-real-time execution of control software. This paper describes the structure of real-time simulator and controller that can be used for design and verification of real-time digital controllers. The virtual machine concept adopted by the proposed real-time simulator makes the proposed simulator be independent from the specific hardware platforms. The proposed system can also be used in the loosely coupled distributed environments connected through local area network using real-time message passing algorithm and virtual data table based on the shared memory mechanism.

• International journal of advanced smart convergence
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• 제12권3호
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• pp.25-31
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• 2023

This paper designs a real-time video playback system using a web camera in the RTSP server. It designs a function to play the video data of the web camera in the client in real time using the web camera in the server and using the RTSP protocol. It consists of a server module function that produces real-time video information using a web camera and a client module function that plays video received from the server in real time. The experiment was conducted by establishing an environment for designing a real-time video playback system using a web camera. As a result of the experiment, it was confirmed that real-time video playback from the server's web camera worked well.