• Journal of Food Hygiene and Safety
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• v.30 no.2
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• pp.127-131
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• 2015

This study aimed to calculate the required sample size to monitor food items during risk assessment studies. Based on a data set from a previous study (2,400 data points for heavy metal assessment from 17 food items), the required sample size was estimated by using a single equation with the standard deviation value, error range, and 95%-99% confidence intervals. The required sample size was calculated with each of the heavy metals for the assessment. The results showed that cadmium, lead, and mercury of required sample sizes for further monitoring were range of 7-90, 7-1, 062, and 11-238, respectively. We found that the required sample size varied depending on the standard deviation of the previous monitoring data. This study provides a basic method to determine the minimum sample size required in food monitoring to devise practical sampling strategies.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.3
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• pp.572-579
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• 2009

A monitoring system needs many parameters to increase devices for monitoring data and to support various services. In particular, monitoring the status of a device in a wireless mobile environment has a difficulty in displaying multi data in a limited screen size, and transfer of the status data of a device into a network is largely related with network traffic. The research aims at designing a control board that collects data in order to effectively manage a greenhouse environment system. Also, the research tries to appropriately operate devices, environment data monitoring, and the control of each device by realizing a multiplexed interface based on a web. Thus, in the case in which a distributed client was a computer, monitoring and control were obtained with a web browser through the Lab VIEW web server of a server or local control module in order to effectively monitor and control according to the status of a user. In the case in which a client was a PDA, application of a wireless mobile considering the scale and data processing capacity of a displayer was connected. As a result of the research, we could confirm a satisfactory outcome from the viewpoint of a human-centered design by supplying adaptability and mobility according to the environment of a user.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.4
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• pp.909-916
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• 2015

Recently, as shown demands and the need for Cloud dig data, large-scale data centers, as well as factory unit's have also vigor. This study focuses the system design that can integrate various facilities on the data center build upon of the factory and the midsize group. Because the integrated facilities management of midsize groups should have variety of sensors and devices requires integrated monitoring system that can manage them as a whole. In this study, it constitutes a integrated model protocol interface of the various facilities, it suggests ways to avoid the errors that may occur during design to study the development and systematically carried out. For this purpose, this study provides the analysis of a failure information delivery time and integration scenario for efficient analysis and evaluation of an integrated monitoring system.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.178-180
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• 2021

자율운항제어를 위하여 선박-육상 간 무선통신망을 통한 원격 모니터링 환경에 대한 선행 연구가 필요하며, 무선통신망을 통한 다양한 데이터의 송수신 환경 중에 효율적인 네트워크 관리 및 운용 솔루션이 중요한 요소로 작용한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.2
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• pp.312-320
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• 2010

Most online monitoring systems of running currently based on the wired network and local area wireless network generate an increase of administrative costs such as synchronization of data protocol conversion, flexible operation of measurement devices and maintenance. To solve this problem, this paper proposes the SMS data transmission protocol which allows multiple data collecting device to manage effectively including implementation method of cdma-based environmental information monitoring system. Also this paper shows operational safety of the proposed protocol and analyzes efficiency of data transfer and operating using SMS.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1328-1331
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• 2008

본 논문에서는 트리구조의 네트워크 환경에서 주기적인 트래픽의 효율적인 모니터링을 위한 TDMA(Time Division Multiple Access)기반의 스케줄링 알고리즘을 제안한다. 주기적인 모니터링 환경을 위해 제안된 기존의 연구[1]는 트리구조가 깊어지고, 자식 노드들이 많은 환경에서 에너지 소모가 증가하고, 데이터 처리율이 떨어지는 문제점을 갖는다. 이를 해결하기 위해 유휴 타임 슬롯(Time Slot)을 활용하고, 데이터를 중복되지 않게 보내는 알고리즘을 제안한다. 제안된 알고리즘은 기존연구와의 비교를 통해 더 높은 데이터 처리율과, 에너지를 적게 소모함을 보였다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.6
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• pp.1001-1006
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• 2023

Globally, rising energy costs and increased energy demand are important issues for the food processing and manufacturing industries, which consume significant amounts of energy throughout the supply chain. Accordingly, there is a need for the development of a real-time energy monitoring and analysis system that can optimize energy use. In this study, a food factory energy monitoring system was proposed based on IoT installed in a food factory, including monitoring of each facility, energy supply and usage monitoring for the heat treatment process, and search functions. The system is based on the IoT sensor of the food processing plant and consists of PLC, database server, OPC-UA server, UI server, API server, and CIMON's HMI. The proposed system builds big data for food factories and provides facility-specific monitoring through collection functions, as well as energy supply and usage monitoring and search service functions for the heat treatment process. This data collection-based energy monitoring system will serve as a guide for the development of a small and medium-sized factory energy monitoring and management system for energy savings. In the future, this system can be used to identify and analyze energy usage to create quantitative energy saving measures that optimize process work.

• Journal of the Korea institute for structural maintenance and inspection
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• v.28 no.3
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• pp.66-73
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• 2024

Stay-cable is one of the most important load carrying members in cable-stayed bridges. Monitoring structural integrity of stay-cables is crucial for evaluating the structural condition of the cable-stayed bridge. For stay-cables, tension and damping ratio are estimated based on modal properties as a measure of structural integrity. Since the monitoring system continuously measures the vibration for the long-term period, data acquisition systems should be stable and power-efficiency as the hardware system. In addition, massive signals from the data acquisition systems are continuously generated, so that automated analysis system should be indispensable. In order to fulfill these purpose simultaneously, this study presents an autonomous cable monitoring system based on domain-knowledge using IoT for continuous cable monitoring systems of cable-stayed bridges. An IoT system was developed to provide effective and power-efficient data acquisition and on-board processing capability for Edge-computing. Automated peak-picking algorithm using domain knowledge was embedded to the IoT system in order to analyze massive data from continuous monitoring automatically and reliably. To evaluate its operational performance in real fields, the developed autonomous monitoring system has been installed on a cable-stayed bridge in Korea. The operational performance are confirmed and validated by comparing with the existing system in terms of data transmission rates, accuracy and efficiency of tension estimation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.6
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• pp.95-100
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• 2009

Nowadays there are many studies and there's huge development about USN/RFID which have great developmental potential to many kinds of applications. More and more real time application apply USN/RFID technology to identify data collect and locate objects. Wide deployment of USN/RFID will generate an unprecedented volume of primitive data in a short time. Duplication and redundancy of primitive data will affect real time performance of application. Thus, security applications must filter primitive data and correlate them for complex pattern detection and transform them to events that provide meaningful, actionable information to end application. In this paper, we design a ECA Rule system for security monitoring of exhibition. This system will process USN/RFID primitive data and event and perform data transformation. It's had applied each now in exhibition hall through this study and efficient data transmission and management forecast that is possible.

• Bulletin of the Korean Space Science Society
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• 2003.10a
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• pp.65-65
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• 2003

본 논문에서는 국제우주정거장의 데이터 인터페이스 구현 및 시험을 위하여 1553B와 FDDI 하드웨어를 이용한 시뮬레이터를 제작하였다. 데이터 인터페이스 시뮬레이터는 국제우주정거장과 탑재모듈에 대한 시뮬레이터와 탑재모듈의 제어부분, 상태를 확인하기 위한 모니터링 부분으로 구성되어진다. 국제우주정거장 시뮬레이터는 탑재모듈에 명령을 내리고 상태데이터를 받아 분석하며 탑재모듈에서 수집된 데이터를 수신하여 저장하는 기능을 갖는다. 탑재모듈은 국제우주정거장에서 오는 탑재 수집 데이터를 받아 분석/수행하고 탑재모듈에서 수집된 데이터를 시뮬레이션 하는 기능을 가지며, 모니터링 시스템은 데이터 통신간의 인터페이스 속도나 상태 등을 분석하고 전체적인 그래픽 인터페이스를 제공한다. 본 논문에서는 기존의 PC환경에서 직렬통신과 TCP/IP를 이용하여 시뮬레이션 한 것을, PCI 카드 타입의 1553B와 FDDI 데이터 인터페이스 하드웨어를 이용하여 구현하고 시험하였다. 시뮬레이터 시험 및 검증을 위해서 4가지 타입의 명령을 만들었으며, 국제우주정거장 모듈에서 명령을 내리면 탑재모듈에서 해당 명령을 수행하는 과정을 GUI 환경의 프로그램으로 모니터링 하여 검증하였다. 본 연구를 통하여 국제우주정거장과 탑재모듈 간의 요구사항 분석, 데이터 인터페이스 포맷 정의, 데이터 인터페이스 하드웨어 환경 구현 등의 성과가 있었으며, 추후 탑재모듈 특성이나 국제우주정거장의 구체적인 기능 추가에 의해 탑재모듈 개발을 위한 ETB로 활용할 수 있을 것으로 기대된다.