• 한국농공학회논문집
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• 제63권3호
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• pp.87-95
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• 2021

The Doam Lake Watershed is one of Gangwon-do's non-point source management areas. This area has a lot of snowfall in winter, and it is expected that there will be a lot of soil erosion in early spring due to snow melting. In this study, snow melting was monitored in the Doam Lake watershed from February to 3, 2020. It was conducted to analyze the water quality changes by calculating the concentration of non-point source pollution caused by snowmelt, and to compare the concentration of water quality during snowmelt event with rainfall and non-rainfall event. As a result of water quality analysis, Event Mean Concentration (EMC) at the first monitoring was SS 33.9 mg/L, TP 0.13 mg/L, TN 4.33 mg/L, BOD 1.35 mg/L, TOC 1.84 mg/L. At the second monitoring, EMC were SS 81.3 mg/L, TP 0.15 mg/L, TN 3.12 mg/L, BOD 1.32 mg/L, TOC 3.46 mg/L. In parameter except SS, it showed good water quality. It is necessary to establish management measures through continuous monitoring.

• 정보과학회 논문지
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• 제44권5호
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• pp.449-459
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• 2017

DDS(Data Distribution Service)는 유연성, 확장성, 실시간 통신 환경을 지원하는 통신 미들웨어이다. 본 논문에서는 DDS 미들웨어의 성능을 향상시키기 위한 방법들을 제안한다. DDS 미들웨어 내부 동작과 관련된 세부 이벤트를 정의하고, 이벤트 구동형 구조에 적용하기 위해 하나의 DDS 메시지를 의미 있는 서브메시지 단위로 분해함으로써 처리 복잡도를 낮출 수 있다. 제안하는 히스토리캐시 관리 기법은 DDS의 특성 상 상태접근과 임의접근이 빈번하게 발생한다는 사실을 이용한다. 제안한 방법들을 본 연구팀이 개발한 EchoDDS에 적용하여 성능을 향상시켰다.

• 한국IT서비스학회지
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• 제15권3호
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• pp.51-69
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• 2016

Recently, many Korean firms have suffered financial losses and damaged firm's trust due to information security incidents. Hence, a lot of firms have realized the importance of the information security. In particular, the demand for information security certification has increased. This study examined the effect of information security certification using the event study methodology. Our research shows that the announcement of the information security certification significantly influences the market value of the corresponding firm. The certified firms rise, on average, o.4993% (-2 day), 0.5462% (+1 day) of their market value. Further, we found that the financial sector in our data showed a 1.4% higher abnormal returns than the nonfinancial sector. On the other hand, whether a firm first acquired the information security certification is not significant. Our paper presents that it is possible to analyze the effect of the information security certification using the event study. We are expected to be used in making a decision for the investment of information security. Also, our results indicate that the firm which have acquired the information security certification should actively announce that fact.

• 약학회지
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• 제50권3호
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• pp.145-153
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• 2006

The adverse events which do not appear in the approval process tend to occur more frequently at the early stage of the use. Therefore new drugs, drugs with different active substances or routes of administration, or drugs with explicitly different efficacy added are particularly chosen for re-examination, and go through a study, which is conducted on 600 to 3,000 subjects over 4 to 6 years. Since the re-examination system was implemented in January 1995, 880 drug products have been designated as the subject of re-examination and among them 194 drugs have been completed their re-examination as of until March 2005. Post Marketing Surveillance to insure drug safety should be correlated with re-examination of new drug, re-evaluation of drug, and adverse event monitoring system. And the first labeling change should reflect all information collected for a defined period of time after the marketing authorization is granted. Furthermore centralized management through spontaneous reporting system of adverse event for whole period of time would be the most desirable type of system.

• 동의생리병리학회지
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• 제19권1호
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• pp.19-28
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• 2005

According to each developing type, we study a concept, contents and a consideration about in oriental medicine industry. The divisions of each developing speciality are followings: Urban industry type - The development of urban industry type has difficulties; The lack of technical development and social adaptation, etc. If it overcomes these difficulties, it will be activated in the oriental medicine industry. Rural industry type - The oriental medicine industry of rural type needs the model of rural oriental medicine industry which leads an activity and an independence of the rural region. Within the industrialization of the oriental medicine industry, if rural resource makes a specialized brand, it can have great effects in the future industry. Resort industry type - When The resort type is related the characters of natural circumstances, cultural industry and health management, it has many effects. If we gain the clear direction which is activated the regional specialities, the oriental medicine industry of resort type can estabilishs the high value industry. Event industry type - The event type is a festival, an exhibition, etc. Within this event, the promoter must provide visitors the specialized sights, the food things, the enjoyable things. And using traditional image, we have the regional resource is recognized good things and the nomination of open place can inform.

• 한국환경복원기술학회지
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• 제9권6호
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• pp.117-122
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• 2006

The objective of this study is to analyze the greenroof runoff quantity and delay. The experimental districts, have different soil thickness and vegetation, had installed. A measurement was conducted in Seoul University to investigate the runoff quantity and delay of the greenroof. The measurement point of runoff quality data were 8, located next to each experimental district. Also, the precipitation was measured by rain gauges(# RG2). The experimental investigation lasted from 21th July to 4th December, a total of 137 days. The results showed that the greenroof can contribute runoff retention and delay by soil, but the intensity of actual rain event affected the runoff reduction and delay. Overall, when was the rainy season, percent rainfall retention ranged 17.5% and runoff flow was delayed for 1-3 hours. But on the other hand, when was the typical rain event, percent rainfall retention ranged over 90% and runoff flow was delayed for 1-11 hours. In the result, the greenroof had the greatest runoff retention and delay, while for the typical rain event.

• 한국정보처리학회논문지
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• 제4권6호
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• pp.1464-1480
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• 1997

분산 시스템은 높은 성능, 결함 허용성, 정보와 자원의 공유 등을 이룰 수 있는 환경을 제공한다. 그러나 분산 시스템 내에서 발생하는 사건과 상태들을 적절히 관리하지 못하면 이러한 장점의 혜택을 받을 수 없게 된다. 이러한 사건과 상태들은 성능 저하, 동작 오류, 수상한 행위 등의 징후가 될 수 있으므로 자세히 분석되어야 한다. 사건/상태를 적절히 관리하려면 이들을 명세하고 효율적으로 탐지할 수 있어야 한다. 본 논문에서는 사건/상태의 중앙 집중 탐지 알고리즘에 대해 설명한다. 다음 계층적 구조를 갖는 분산 시스템에서 이 탐지 알고리즘을 분산화 하는 방안에 대해 설명한다. 분산 알고리즘은 사건/상태 탐지 임무를 부임무들로 분해하는 과정과 부임무들을 적절한 노드들에 할당하는 과정으로 구성된다. 또 이 분산 탐지 알고리즘이 결함 허용성을 갖도록 하는 방안에 대해서도 설명한다.

• 한국환경과학회지
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• 제26권3호
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• pp.401-410
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• 2017

This study analyzed the changes in the concentrations of organic matters in constructed treatment wetlands, coming from discharge water from a sewage treatment plant and non-point pollutant sources during rainfall events. At the beginning of a rainfall event, a massive amount of particulate organic matter flowed in, and was removed from the sedimentation basin (S1, S2); dissolved organic matter was removed after passing through stepwise treatment processes in the wetland. During dry period in the wetland, the removal efficiency rate for COD and TOC was -21 and -7%, respectively; during the rainfall event, the removal efficiency rate for COD and TOC were 47 and 43%, respectively. The highly-concentrated organic matters that flowd in at the beginning of the rainfall event was stabilized by various structures in the wetland before water discharge. Cyanobacteria blooms annually at the confluence of the So-ok stream and Daecheong Lake. Therefore, it is expected that the wetland will contribute significantly to reducing cyanobacteria and improving water quality in the area.

• Journal of Information Technology Applications and Management
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• 제15권1호
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• pp.67-81
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• 2008

Last decade, IT industry in Korea has been developed greatly. The game industry as an international leader has given good value added to its country. Game industry is one of the speedy improved one and it showed over 20% of growth rate from 2002. Most distressings in Game industry, there are no established costing system in spite that there should be in emerging market. In 2004, Game Contents Costing Model using Mission and Event was developed and also the study of Game Elements weight was done in 2005. The cost of Game Contents can be calculated by GEP and its unit price. The study of Game Contents Sizing Model was done in 2005. The costing of Game Contents by single Game Element which represents software which is one of 3 Game Elements-plan, graphic and software-and it is counted by mission and event. If the software element only can not well represent Game Contents volume, we can include plan and graphic elements for Game Contents costing. And we can say above two methods as a costing model of Game Contents. In this paper, these models were tested empirically and proved as usable.

• 한국항공운항학회지
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• 제23권4호
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• pp.102-108
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• 2015

According to various researches, one of main causes of flight accidents is influence of human factors. It is important to collect and analyze event data in advance to minimize and prevent human errors by developing safety checklist. As a result international aviation industry developed Flight Operations Quality Assurance for commercial airliners, and, upon its proven effectiveness, it is now highly recommended to adopt for helicopter operations. Consequently, S government organization instituted Helicopter Flight Operations Quality Assurance system in 2012. Hence, this study conducted regression analysis of S organization's flight event frequency and applied ICAO SMS Matrix to categorize the severity of the events according to international standards. Based on the analysis, this research derived fundamental checklist factors for helicopter, which can be a proactive measure for safe operation.