• 전기의세계
• /
• v.23 no.1
• /
• pp.49-51
• /
• 1974

지금까지 대부분 전자계산기를 사용코저 하는 사람, 즉 user가 직접 전자계산소에 가서 service를 요청하면, 계산소에서 필요한 처리를 하여 그 결과를 용지에 인서하여 user에게 수도하는, 즉 off-line batch처리방식이 위주였다. 그러나 KIST등 일부에서는 중앙의 전자계산소와 통신선으로 연결된 user의 원격단말장치(remote terminal)에 의하여 user가 직접 계산소에 가지 않아도 이 단말장치에서 service를 받을 수 있는 on-line방식이 시도되었으며, 최근에는 대한항공회사의 항공좌석예약 on-line real time system과 외환은행의 은행창구업무 on-line real time system의 개발이 결실을 보기에 이르러, 우리나라에서도 이제 본격적인 정보사회의 모습을 갖추게 될 단계에 다달하게 되었다. 따라서, 여기서는 on-line real time system의 개념을, 이 방면에 관한 지식이나 상식이 없는 회원을 위하여 되도록이면 쉽게 해설코자 한다.

• Korean Journal of Veterinary Service
• /
• v.37 no.1
• /
• pp.59-65
• /
• 2014

Equine herpesvirus myeloencephalopathy, out of symptoms by equine herpesvirus type 1 (EHV-1) infection, can cause devastating losses on individual farms. Although myeloencephalopathy syndromes of horses in Korea have been recognized for a couple of years in horse populations, there is little study regarding the occurrence of EHV-1 infections. The present study was performed to detect the viral infection of horses with neurological syndrome using real-time PCR. Fifteen horses (27.3%) out of 55 horses with neurological deficiency were positive for EHV-1 viral antigen. Among these 7 horses, 4 horses were detected genotype of A2254/N752 and 3 horses G2254/D752 strain, respectively.

• Proceedings of the KIEE Conference
• /
• 2002.07d
• /
• pp.2727-2729
• /
• 2002

In an emergency telemedicine system such as High-quality Multimedia based Real-time Emergency Telemedicine(HMRET) service, it is very important to examine the status of the patient continuously using the multimedia data including the biological signals(ECG, BP, Respiration, $SpO_2$) of the patient. In order to transmit these data real time through the communication means which have the limited transmission capacity. It is also necessary to compress the biological data besides other multimedia data. For the HMRET service, we developed the lossless biological signal compression program in MSVC++ 6.0 using DPCM method and JPEG Huffman table, and tested in an internet environment.

• Proceedings of the IEEK Conference
• /
• 2003.11c
• /
• pp.121-124
• /
• 2003

Passive optical networks (PONs) will be the pervasive choice in the design of next-generation access networks. One possible solution to implementing Passive optical access network is to rely on wavelength-division multiplexing (WDM). In this paper, we solve the problem of providing real-time service to both hard and soft real-time messages in conjunction with a conventional vest-effort service in WDM. we propose an adaptive scheduling algorithm to schedule and manage the message transmissions in the optical access network. Proposed algorithm is MLF-MQF. Also, we suggest dynamic bandwidth algorithm(DBA) in Loop-back WDM-PON (LPB-PON).our mechanism based on bandwidth reservation protocol.

• Journal of Information Processing Systems
• /
• v.19 no.4
• /
• pp.439-449
• /
• 2023

This paper deals with a resource efficient artificial intelligence (AI) service architecture for multi-channel video streams. As an AI service, we consider the object detection model, which is the most representative for video applications. Since most object detection models are basically designed for a single channel video stream, the utilization of the additional resource for multi-channel video stream processing is inevitable. Therefore, we propose a resource efficient AI service framework, which can be associated with various AI service models. Our framework is designed based on the modular architecture, which consists of adaptive frame control (AFC) Manager, multiplexer (MUX), adaptive channel selector (ACS), and YOLO interface units. In order to run only a single YOLO process without regard to the number of channels, we propose a novel approach efficiently dealing with multi-channel input streams. Through the experiment, it is shown that the framework is capable of performing object detection service with minimum resource utilization even in the circumstance of multi-channel streams. In addition, each service can be guaranteed within a deadline.

• Journal of Korean Society for Quality Management
• /
• v.18 no.1
• /
• pp.21-28
• /
• 1990

In this paper, the capacity of system which provides the real time response call service to the customer is studied. The quality of call service depends on the response time of the service in the system. Therefore, the focus of this paper is to investigate the capacity of system under the restriction of response time. In this paper, the system is modeled by queueing network. The analytical method is applied to solve this queueing network. The solution of the model has product form solution. To get the reasonable capacities, nonlinear programming problem is formulated and is solved by GINO.

• Proceedings of the Korean Information Science Society Conference
• /
• 2004.04a
• /
• pp.160-162
• /
• 2004

실시간 운영 체제(Real-Time Operating Systems)는 시스템 동작이 논리적 정확성뿐만 아니라 시간적 정확성에도 좌우되는 운영 체제이다. 시간 결정성(Time Determinism)을 지키기 위해서는 시스템에서 발생하는 모든 사건에 대해서 예측이 가능해야 한다. 시스템에서 발생하는 사건은 인터럽트에 의해 처리되는데, 이것은 비동기적인 사건의 발생을 CPU에게 알리는 하드웨어 메커니즘으로서 인터럽트 서비스 루틴(Interrupt Service Routine ： ISR)을 통해서 인터럽트에서 처리해야 할 부분을 수행한다. 본 논문에서는 인터럽트의 처리를 인터럽트의 인지와 처리로 분리할 수 있도록 LISR과 HISR을 설계로 구현하였다.

• The Transactions of the Korean Institute of Electrical Engineers D
• /
• v.52 no.11
• /
• pp.644-649
• /
• 2003

This study develops an analytical model for the delay analysis of real-time data in the token-passing service of Foundation Fieldbus(FF). Using the analytical model, this study proposes a network design scheme of FF Two design criteria are introduced in this study; one is the average delay of real-time data, and the other is the maximum allowable delay of real-time data. The network design scheme determines the network parameters that satisfies the performance requirements given by these design criteria.

• Journal of The Korean Society For Urban Railway
• /
• v.6 no.4
• /
• pp.351-361
• /
• 2018

In this paper, we analyse DDS(Data Distribution Service) QoSs(Quality of Services) with experiments, which can control the network transmission quality provided by 'Object Management Group' DDS standard to satisfy the data transmission quality requirements of 'Real-time integrated railway safety monitoring and control system(RIRSMCS)'. 'RIRSMCS' is a system for collecting and analyzing data from various sensors at a railway field to predict and prevent the risk of potential railway accidents. Data transmission quality should be ensured for transmitting the collected data in real-time, accurately and stably for this system. Experimental results show that it is possible to ensure real-time, accurate and stable data transmission for monitoring and control of railway safety using DDS QoS.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.12 no.5
• /
• pp.275-281
• /
• 2012

A streaming service is considered as an important fact to listen musics at mobile device in the popular smart-phone era. An apple's HTTP Live Streaming method is used in iOS and a RTSP(Real-time Streaming Protocol) method is used in Android OS. A Wowza Media Sever will be used to support both apple and android mobile streaming. This paper describes a design and implementation of smart-phone app. to record user's songs by userself with smart-phone recording function, upload to the streaming server and to service real-time mobile streaming play for an user's selected song and provide song sharing SNS functions.