• 한국멀티미디어학회논문지
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• 제20권3호
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• pp.474-481
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• 2017

In Korea, foot-and-mouth disease has not been reported for several decades, but it began to develop again in 2000. For 2010~2011, when the worst occurred, 3.5 million animals were disposed of resulting in a loss of 2.8 trillion won. In order to prevent the harmful effects of foot-and-mouth disease, vaccination and housing management are being implemented. Despite these measures, foot-and-mouth disease is infected with air through the respiratory tract and accompanies fever after latency. Therefore, it is recognized that measuring and managing the body temperature of livestock at the early stage is the first step of managing this disease. In this paper, we propose a temperature monitoring system that can measure the body temperature by incorporating temperature sensor mounted in ear-tag of cattle and collect body temperature data of each individual cattle through BLE into the control server. The proposed body temperature monitoring system has various advantages such as easy installation without the help of livestock specialists and not damaging the organs of the livestock. So, it is possible to manage the abnormal symptom of cattle in real time and it is believed that the proposed monitoring system will revolutionize the prevention of foot-and-mouth disease.

• KEPCO Journal on Electric Power and Energy
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• 제1권1호
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• pp.1-8
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• 2015

When the line and switchgear of the substation system are disconnected, ferro-resonance can occur. This happens even if the capacitive reactance and inductive reactance are not equal, which are not common resonance conditions. Resonance conditions vary depending on the busbar configuration environment. Although the damping resistance method applying the existing saturable reactor to cope with ferro-resonance has been successfully applied on site, there can be loss of normal function during long-term operation. The reason is because the rise in the operating frequency of saturable reactors means the saturation number is increased. Therefore, it can no longer function as saturable reactor since the resistor having inadequate capacity is burned out. To address this problem, in this paper, an EMTP-based simulation test was performed by designing and applying a dual reactor method, which adds an extended divergence reactor to the 1st side of the VT. The test result confirms that when the divergence reactor is inserted, the voltage and current values obtained at the 1st side and 2nd side of the VT as well as current values of divergence reactor part were stabilized from the transient phenomena and return to normal values. When compared with existing measures, although this method is similar in adding having a reactor added to a system regarding ferro-resonance, it has the advantage of being able to prevent ferro-resonance in advance since the reactor is added before the system is saturated. In addition, because it does not use damping resistance, it can extend the equipment life and stabilize its operation. Therefore, there are a lot of differences in terms of its operating characteristics and achivement of goal between the conventional method and new divergence reactor method.

• 한국정보과학회논문지:정보통신
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• 제37권5호
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• pp.351-362
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• 2010

우리나라는 IT 기술의 급속한 발전과 인터넷의 급속적인 보급으로 인해 국가 정보화의 기반 인프라가 매우 잘되어 있지만 주변 강대국들의 위협 속에 사이버테러의 위협도 급격히 증가하고 있다. 아울러 전 세계적으로 사이버전(戰)의 위협도 가속화 되고 있다. 지식 정보화 사회에 대한 사이버 공격은 산업과 경제활동은 물론 국가 안위를 근본적으로 위협하는 요인이 된다. 이미 해외 주요 국가들은 한 번의 사이버 공격으로도 국가 안보에 구멍이 뚫려 엄청난 경제적 손실을 가져올 수 있음을 인식하고, 사이버 공간에서 자국민이 안심하고 활동할 수 있도록 안정성을 최대한 보장하기 위한 정책을 마련하여 추진 중에 있다. 이와 더불어 우리나라뿐만 아니라 전 세계적으로 자연적, 환경적 재난의 위협도 증가하고 있다. 인도네시아나 필리핀처럼 쓰나미, 태풍, 지진 동 온갖 자연재해가 수시로 발생하는 국가는 사전 예방과 사후 복구 동 국가 차원의 체계적인 재난관리시스템이 구축되어 이에 대비하고 있다. 우리나라도 사이버테러 위협으로부터 사전 예방과 사후 복구를 위한 체계적인 관리가 필요하며, 이를 위해 국가차원의 사이버 재난관리(Cyber Disaster Management)에 대한 시스템 구축이 절실하다. 이에 따라, 본 논문에서는 해외 주요국의 사이버 안보정책을 분석하여 국가차원의 사이버 재난관리 시스템 구축을 위한 방안을 제안하고자한다.

• 한국지반신소재학회논문집
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• 제17권4호
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• pp.157-168
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• 2018

최근 기후 변화로 인한 태풍 및 국지적 집중호우의 발생 빈도가 증가하고 있다. 이로 인해 농촌지역에서는 산사태 피해가 발생할 가능성이 더욱 커지고 있다. 그러나 현실적으로 공학적인 안정성 평가 연구는 미미한 상태이다. 따라서 농촌지역의 산사태 피해를 경감시키고 재해위험이 있는 산간 지역을 효과적으로 관리하기 위해서는 산사태에 대비한 방재 기술의 발전이 필요한 실정이다. 본 연구에서는 토석류 방호시스템에 동적 충격 하중이 작용할 때 완충 스프링의 충격에 대한 완화 효과를 분석하기 위해 완충 스프링 자유장별로 수치해석을 수행하고, 하중분담율에 대하여 고찰하였다. 또한, 기존 완충 스프링과 쐐기형 완충 스프링과의 동적 충격하중 크기 변화에 따른 인장강도에 대한 비교분석으로 현장 적용성을 검증하였다. 연구 결과 네트형 토석류 방호시스템은 산사태 발생 시 토석류에 의한 시설물 및 인명 피해의 손실을 방지하는데 효과적인 것으로 판단된다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2008년도 춘계종합학술대회 A
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• pp.527-530
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• 2008

디지털 워터마크 기법은 1990년대 초 지적 창작물(음악, 영상, 동영상)에 대한 저작권과 재산권의 보호 및 인증, 데이터 손실 여부 판단, 복사 방지 및 추적 등을 목적으로 한 사후 재산전의 보호기술로 제안되었다. 본 연구에서는 의료 영상 정보에서 발생할 수 있는 기하학적 변환과 압축 등의 영상 변환에서도 워터마크의 견고성을 확인할 수 있는 워터쉐드 분할 알고리즘을 적응한 견고한 워터마킹기법을 제안하였다. 견고한 워터마컴 기법은 의료 영상에 대한 압축, 필터링, 노이즈와 같은 공격에 보다 견고한 몇 개의 알고리즘을 적용하였다.

• 해양환경안전학회지
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• 제7권2호
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• pp.39-48
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• 2001

In recent years, the marine traffic congestion has increased due to the expansion of vessel traffic volume in Korean coastal waterway. Heavy traffic could bring serious marine casualties which cause the loss of human lives, properties and marine pollution in coastal area. The prevention of marine accidents has been a major topic in marin society and various policies and countermeasures have been developed, applied to the industries. VTS(Vessel Traffic Services) is considered as one of effective method to promote marine safety but it needs relatively huge amount of budgets to build and also number of personnels for the operation. Thus prior to establishing the VTS. It should be surveyed the marine traffics, general conditions of waterway including geographical, meteorological characteristics and assessed to find the most reasonable area and places for the system. Therefore this paper aims to develop the method for this evaluation through the hierarchical evaluation structure model in connection with ISM(interpretive structural modeling) and AHP(analytic hierarchy process) methods. The model in this paper is applied to 4 coastal area in Korean waterway as candidates and found that the priority for the needs of VTS should be in order such as Yosu, Wando, Mokpo, Geoje coastal area.

• 대한안전경영과학회지
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• 제17권1호
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• pp.321-335
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• 2015

This study introduces the methods to apply and develop the integrated Cost of Quality (COQ) and Time-Driven Activity-Based Costing (TDABC) model for seeking not only quality improvement but also reduction of overhead cost. Inefficient and uneconomical COQ activities can be identified by using time driver which also maximizes the quality improvement for Prevention-Appraisal- Failure (PAF) quality costs. In contrast, reduction of the indirect cost of unused capacity resource using Quality Cost Capacity Ratio (QCCR) of TDABC minimizes overhead cost for COQ activities. In addition, linkage between Overall Equipment Effective (OEE) and Time Driver develops the integrated system of Total Productive Maintenance (TPM) and TDABC model. Lean OEE maximizes when an Unused Time (UT) of TDABC that are TPM losses and lean wastes reduces whereas the TPM Cost Capacity Ratio (TCCR) of TDABC minimizes indirect cost for non-value added TPM activities. Numerical examples are derived to better understand the proposed COQ/TDABC model and TPM/TDABC model from this paper. From the proposed model, process mapping and time driver of TDABC are known to lessen indirect cost from general ledger of comprehensive income statement with a better quality innovation and improvement of equipment.

• 한국전자통신학회논문지
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• 제6권1호
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• pp.105-110
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• 2011

카지노장에서 직원에 의한 횡령사건이 발생하였다. 일부 카지노 직원들은 직무 만족도가 낮으며, 도덕적인 괴리감으로 이직을 심각하게 고려하고 있다. 또한 대량의 현금 유혹과 자금관리시스템의 부족은 횡령사건을 발생시키고 있다. 본 논문에서는 카지노 산업의 특수성과 직원직무만족도를 조사한다. 카지노 횡령사건의 발생내용을 분석하고, 계좌추적과 수표에 대한 조회 및 혐의자에 대한 휴대폰 통화내역 등의 디지털 포렌식 수사기술을 연구한다. 문제점과 해결방안은 손실예방 프로그램 실시, 디지털 포렌식 기술과 수사관 도입에 대한 제안을 한다. 본 연구를 통해 카지노 업무를 전산화하여 횡령사고를 예방하며, 수익금에 대한 사회 환원과 포렌식 수사기술 발전에 기여하게 될 것이다.

• 농촌계획
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• 제27권4호
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• pp.83-96
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• 2021

This study analyzes the perception of public value created by Korea Rural Community Corporation, a representative public corporation in the agricultural and rural sector. We categorize agricultural and rural public values as 'stable food supply,' 'conservation of national environment and nature,' 'formation and cultivation of water resources,' 'prevention of soil loss and flooding,' 'conservation of ecological system,' 'conservation of rural tradition and culture.' For the qualitative analysis, we apply content analysis. And, for the quantitative analysis, we use topic modeling and Latent Dirichlet Allocation (LDA) analysis which is used widely in the field of text-mining. Results show that internal perception for value suppliers are mainly created for 'stable food supply,' 'formation and cultivation of water resources,' and 'conservation of rural tradition and culture.' External perception for value demanders are created for all public values, but its evaluation and demand include various aspects including both positive and negative opinions.

• Journal of Information Technology Applications and Management
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• 제30권6호
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• pp.69-80
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• 2023

Ship collision accidents not only cause loss of life and property damage, but also cause marine pollution and can become national disasters, so prevention is very important. Most of these ship collision accidents are caused by human factors due to the navigation officer's lack of vigilance and carelessness, and in many cases, they can be prevented through the support of a system that helps with situation awareness. Recently, artificial intelligence has been used to develop systems that help navigators recognize the situation, but the sea is very wide and deep, so it is difficult to secure maritime traffic datasets, which also makes it difficult to develop artificial intelligence models. In this paper, to solve these difficulties, we propose a method to build a dataset with characteristics similar to actual maritime traffic datasets. The proposed method uses segmentation and inpainting technologies to build a foreground and background dataset, and then applies compositing technology to create a synthetic dataset. Through prototype implementation and result analysis of the proposed method, it was confirmed that the proposed method is effective in overcoming the difficulties of dataset construction and complementing various scenes similar to reality.