• Title/Summary/Keyword: Monitoring

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Implementation of a Sensor Node with Convolutional Channel Coding Capability (컨벌루션 채널코딩 기능의 센서노드 구현)

  • Jin, Young Suk;Moon, Byung Hyun
    • Journal of Korea Society of Industrial Information Systems
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    • v.19 no.1
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    • pp.13-18
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    • 2014
  • Sensor nodes are used for monitoring and collecting the environmental data via wireless sensor network. The wireless sensor network with various sensor nodes draws attention as a key technology in ubiquitous computing. Sensor nodes has very small memory capacity and limited power resource. Thus, it is essential to have energy efficient strategy for the sensor nodes. Since the sensor nodes are operating on the same frequency bands with ISM frequency bands, the interference by the devices operating on the ISM band degrades the quality of communication integrity. In this paper, the convolutional code is proposed instead of ARQ for the error control for the sensor network. The proposed convolutional code was implemented and the BER performance is measured. For the fixed transmitting powers of -19.2 dBm and -25dBm, the BER with various communication distances are measured. The packet loss rate and the retransmission rate are calculated from the measured BER. It is shown that the porposed method obtained about 9~12% and 12-19% reduction in retransmission rate for -19.2 dBm and -25 dBm respectively.

Screening of Suitable Mold Strains for Production of Taste Materials from Alaska Pollack Flesh (명태육을 기질로 한 풍미물질 발효균주의 선발)

  • Shin, Dong-Hwa;Kim, Young-Myoung;Kim, Dong-Soo;Lee, Byung-Wan
    • Korean Journal of Food Science and Technology
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    • v.22 no.2
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    • pp.221-226
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    • 1990
  • Fish flesh of Alaska pollack containing 5% of corn starch were fermented with 8 strains of mold and monitoring of their flavor characteristics, acceptability, nucleotides and their related compounds, amino acid compositions were conducted. All strains were grown vigorously on fish flesh media and formed their characteristic spores with unique flavor by strains. Amino type nitrogen $(NH_2-N)$ content of fermented fish flesh (FFF) were 25-26 times higher than that of raw flesh and 6-15 times higher in extractable nitrogen (Ex-N) content . The strains which produce more ADP (Adenosine 5'-diphosphate) in FFF also showed much higher level of IMP (Inosine 5'-monophosphate) and GMP (Guanosine 5'-monophosphate) content than that of raw flesh. Amino acid composition were differ by strain but lysine was generally highest and arginine, glutamic acid, leucine and alanine in order In review of sensory evaluation , total content of nucleotides, $NH_2-N$, Ex-N and amino acid compositions, suitable strains for fish flesh fermentation were Aspergillus oryzae KFCC 11371, Asp. oryzae KFCC 32343, Penicillium roqueforti KFCC 11269 and Asp. quercinus.

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Analysis of Red Tide Hot Spots in the South Sea of Gyeongnam Province Using the GOCI Images of COMS (천리안 GOCI영상을 이용한 남해안 적조우심해역 분석)

  • Kim, Dong Gyu;Jung, Yong Han;Yoo, Hwan Hee
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.33 no.5
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    • pp.353-361
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    • 2015
  • The area of red tides occurences, which brings enormous damages every year, have been expanded to the coastal waters across the nation. Regarding to this trend, the development of red tide detection technology by using the GOCI (Geostationary Ocean Color Imager) of COMS lauched in 2010 has been drawn attentions of researchers. This study purposed on analyzing the frequency and density of red tides occurence by using the GOCI for detecting the southern sea, whereas targeted area. The observation has brought over the last three years (2012, 2013, and 2014) before the analysis was conducted. Followingly, the study could be resulted in extracting and revealing the hot spots of the red tides from two of analysis in the overlay and density. The distribution patterns of red tide occurrences according to those observed years has been shown in irregular characteristics and various changes. However, the analysis of hot spots, based on the frequency of the red tide occurrence, has revealed that the frequency of red tide occurences is continuously increased in the specific sea area. Therefore, it is concluded in that the continuous monitoring can contribute to predict accurate movements of red tides, so as establish systematic plans for preventing disasters.

Analysis of Quantitative Topographical Change in Eulsuk-Island Using Aerial Images (항공영상을 이용한 을숙도 지형의 정량적 변화 분석)

  • Lee, Jae-One;Song, Yu-Jin;Kim, Yong-Suk;Park, Hong-Joo
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.29 no.5
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    • pp.527-534
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    • 2011
  • This paper describes an analysis of topographical changes to the Eulsuk-Island at the Nakdong River Estuary using a long-term dataset of high resolution aerial images from 1983 to 2007. Ground control surveying was performed at some feature points using GPS(Global Positioning System) to accomplish AT(Aerial Triangulation) for past aerial images. Even if some still existing feature points appeared on old aerial images were used as GCPs(Ground Control Points) for past aerial images in AT, its accuracy reached at 1m level. Since then, a quantitative analysis of topographical changes was conducted on digital orthophotos produced by a series of aerial images taken by different years. The change volume of total area, construction, vegetation, buildings and roads could be extracted per each period in study area. The total area decreased from 1983 to 1992, but it has not almost changed since 1992. According to the continuous development, the area of vegetation has steadily decreased, while that of buildings and roads has generally increased. The result of this study can provide us with invaluable base data for further topographical change monitoring in Eulsuk-Island and Nakdong River estuary caused by continuous development in this area.

Analysis of Amoxicillin, Ampicillin, Oxolinic Acid, and Flumequin in Foods (식품 중 아목시실린, 암피실린, 옥소린산 및 플루메퀸의 분석)

  • Kim, Hee-Yun;Choi, Hee-Ju;Kim, Yong-Hoon;Choi, Sun-Hee;Cheong, So-Young;Lee, Hwa-Jeong;Kim, Jae-In;Choi, Gye-Sun;Choi, Jae-Chun
    • Korean Journal of Food Science and Technology
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    • v.41 no.5
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    • pp.490-497
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    • 2009
  • The present study was performed to validate an analytical method for veterinary drugs, including amoxicillin, ampicillin, oxolinic acid and flumequin, in meat, fish, and their products as established in the 2007 Korea Food Code, and to monitor the respective drugs in 6 kinds of foods, namely beef, pork, flatfish, rockfish, freshwater eel and shrimp. Additionally, an HPLC-ESI-MS/MS method was developed for the qualification of these veterinary drugs. As a result of monitoring, these drugs were detected in 14 (3.6%) out of 393 samples. In particular, amoxicillin was detected in 9 flatfish samples, and oxolinic acid and flumequin were detected in 4 samples and 1 sample of freshwater eel, respectively. The detection levels of amoxicillin ranged from 0.009 to 0.078 mg/kg, in which 1 sample of flatfish contained more than the MRL (0.05 mg/kg). Flumequin detected in 1 sample of freshwater eel, was less than the MRL (0.5 mg/kg). Therefore, the majority of detected levels were less than the MRLs, with the exception of 2 samples showing amounts that were 1-2 times higher than the MRLs. The detected veterinary drugs were identified and confirmed by the HPLC-ESI-MS/MS method created in this study.

Monitoring microbiological contamination, pre-decontamination, and irradiation status of commercial dried laver (Porphyra sp.) products (시판 유통 김의 미생물 오염도, 사전 살균처리 및 전자선 조사 여부 확인)

  • Lee, Eun-Jin;Kim, Gui-Ran;Lee, Hye-Jin;Kwon, Joong-Ho
    • Korean Journal of Food Science and Technology
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    • v.49 no.1
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    • pp.20-27
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    • 2017
  • Eighteen commercial laver (Porphyra sp.) products were purchased from Korean market and were monitored for their microbial contamination, pre-decontamination, and luminescence properties. The laver samples showed considerable variation in their microbial contamination, from $10-10^7CFU/g$ of total aerobic counts, <$10-10^2CFU/g$ of coliforms in 4 dried laver samples, and <$10-10^6CFU/g$ of yeasts and molds except in 3 samples. In addition, $10^2CFU/g$ of Bacillus cereus was found in one sample. DEFT/APC analysis was suitable for demonstrating whether the samples were pre-decontaminated or not, with DEFT/APC values lower than 2.0 log for non-heated samples and 1.0-8.5 log for heatprocessed samples. In photostimulated luminescence (PSL) calibration, 15 samples irradiated at 1 kGy showed positive (irradiated) values more than 5000 PCs. Furthermore, thermoluminescence (TL) analysis by separating the marker minerals from samples revealed the potential to be employed in identifying irradiation status by determining $1^{st}$ TL glow at $125-175^{\circ}C$ and TL ratio ($TL_1/TL_2$) of all the samples.

Active Network Management System with Automatic Generation of Network Management Program using Triggers (트리거를 이용한 네트워크관리프로그램 자동생성 기능을 가진 능동적인 네트워크 관리 시스템)

  • Shin, Moon-Sun;Lee, Myong-Jin
    • Journal of Internet Computing and Services
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    • v.10 no.1
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    • pp.19-31
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    • 2009
  • Network management involves configuring and operating various network elements in a suitable manner. Generally, a network management system can perform basic functionalities such as configuration management, performance management, and fault management. Due to the open structure of the Internet, the volume of network traffic and the network equipment used have increased in size and complexity. Therefore, it is expensive and time consuming to develop a network management program for heterogeneous network equipment in an SNMP.based network. In order to facilitate the management of network environments and the control of heterogeneous devices in an efficient manner, we propose an Active Network Management System (ANMS) comprising an automatic generator that uses triggers to generate a network management program. The concept of triggers can be represented through event condition action rules performed in response to a change in the status of a network environment. The proposed ANMS comprises basic components for real time network management and also includes an automatic generator (AG). When the ANMS is monitoring network elements that are newly added or changed, a trigger rule is activated and these components are then able to collaborate and automatically generate a new network management program by using the information provided along with the SNMP libraries. Our method is useful for expanding the network structure and replacing network equipment. Through experiments, we have proved that our ANMS is useful when new network objects are added or changed in the network environment to expand the network structure. Further, we have verified that our ANMS system reduces the time and cost required to develop a network management program as compared to the manual method used in existing network management systems.

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A Study on the Accuracy Enhancement Using the Direction Finding Process Improvement of Ground-Based Electronic Warfare System (지상용 전자전장비의 방향 탐지 프로세스 개선을 통한 정확도 향상에 관한 연구)

  • Chin, Huicheol;Kim, Seung-Woo;Choi, Jae-In;Lee, Jae-Min
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.6
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    • pp.627-635
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    • 2017
  • Modern warfare is gradually changing into a network war, and information electronic warfare is also progressing. In modern war, electronic warfare is all military activity concerned with electromagnetic field use, such as signal collecting, communication monitoring, information analysis, and electronic attack. The one key function of signal collecting for enemy signal analysis, direction finding, collects the signal radiated from enemy area and then calculates the enemy direction. This paper examined the Watson-Watt algorithm for an amplitude direction finding system and CVDF algorithm for phase direction finding system and analyzed the difference in the direction finding accuracy between in the clean electromagnetic field environment and in the real operating field environment of electronic warfare system. In the real field, the direction finding accuracy was affected by the reflected field from the surrounding obstacles. Therefore, this paper proposesan enhanced direction finding process for reducing the effect. The result of direction finding by applying the proposed process was enhanced above $1.24^{\circ}$ compared to the result for the existing process.

Reconstruction of Remote Sensing Data based on dynamic Characteristics of Time Series Data (위성자료의 시계열 특성에 기반한 실시간 자료 재구축)

  • Jung, Myung-Hee;Lee, Sang-Hoon;Jang, Seok-Woo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.8
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    • pp.329-335
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    • 2018
  • Satellite images, which are widely used in various applications, are very useful for monitoring the surface of the earth. Since satellite data is obtained from a remote sensor, it contains a lot of noise and errors depending on observation weather conditions during data acquisition and sensor malfunction status. Since the accuracy of the data affects the accuracy and reliability of the data analysis results, noise removal and data restoration for high quality data is important. In this study, we propose a reconstruction system that models the time dependent dynamic characteristics of satellite data using a multi-period harmonic model and performs adaptive data restoration considering the spatial correlation of data. The proposed method is a real-time restoration method and thus can be employed as a preprocessing algorithm for real-time reconstruction of satellite data. The proposed method was evaluated with both simulated data and MODIS NDVI data for six years from 2011 to 2016. Experimental results show that the proposed method has the potentiality for reconstructing high quality satellite data.

A Study on the Application Service of 3D BIM-based Disaster Integrated Information System Management for Effective Disaster Response (효과적인 재난 대응을 위한 3차원 BIM 기반 재난 통합정보 시스템 활용 서비스 제시)

  • Kim, Ji-Eun;Hong, Chang-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.10
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    • pp.143-150
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    • 2018
  • Periodic and systemic disaster management has become more important than ever owing to the recent continuous occurrence of disasters, such as fires, earthquakes, and flooding. This management goes beyond simple disaster preparedness, which was introduced minimally under the existing legal system. For effective disaster management, facilities should be managed through regular maintenance on a daily basis, and in the case of an emergency, intuitive and accurate communication is essential regarding the situation and purpose. BIM manages the entire building property data using the effective 3D visualization model, so it can be used for various management purposes from design to facility maintenance. In this study, through an expert survey on the use of services in a BIM-based integrated disaster information system, the available areas of BIM data were organized in terms of facility information management, 3D visualization, and disaster control. Later, through the use service and DB definition within the BIM-based disaster integration information system, the main facilities monitoring and response services based on BIM and BIM-based spatial management service are proposed. Based on this study, it is hoped that the BIM-based application service functions within the system will be implemented to enable an effective system response.