• 한국지하수토양환경학회지:지하수토양환경
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• 제26권1호
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• pp.76-87
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• 2021

Groundwater is considered to be the best water resource to solve water shortage problems during drought periods. Even though excessive pumping (overdraft) during short-period may give an unprofitable effect on groundwater hydrology, it has a primary role to solve a lack of water resources and to maintain incomes of farmers. This study evaluated maximum irrigation amounts of groundwater to each local-government and province during drought periods. Maximum irrigation amounts of groundwater were evaluated using cumulative groundwater usage data of each local-government during normal and drought years. Maximum irrigation amounts of groundwater during drought periods would be roughly identified as approximately 1.3 times more than the exploitable amounts of groundwater resources for each local-government. Drawdown-limitation depth on groundwater levels at each monitoring well was determined by transforming the maximum irrigating amounts into degree of change on levels. Universal limitation depth of drawdown on groundwater levels was evaluated to be approximately three times of annual fluctuating range on groundwater levels for each monitoring well. Systematic response on groundwater demands with abiding by drawdown-limitation depth can attain an optimal irrigation of groundwater resources during short-term drought.

• 지구물리와물리탐사
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• 제14권1호
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• pp.58-68
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• 2011

전기 및 탄성파 탐사를 이용한 이산화탄소 지중저장의 모니터링의 기초연구로써, 수포화 암석시료에 $CO_2$주입시 비저항과 P파속도를 측정하였다. 암석시료는 Berea사암이며, $CO_2$는 초임계상태 (10 MPa, $40^{\circ}C$)로 주입하였다. 초임계 $CO_2$주입에 의해 비저항의 증가 및 P파속도와 진폭이 감소하였다. P파 속도 토모그램은 암석시료에 주입한 초임계 $CO_2$의 거동양상을 보여주었다. 비저항과 탄성파속도는 $CO_2$거동 모니터링하는데 유용하다. 그러나 P파 속도는 비저항 변화에 비해 $CO_2$포화도가 20% 이상 일때 변화를 보이지 않았다. 비저항으로부터 $CO_2$포화도 예측은 탄성파 속도로부터 $CO_2$포화도 예측의 어려움을 보완할 수 있다. 비저항과 탄성파 속도의 동시측정에 의해 암석시료에 주입한 초입계 $CO_2$ 거동 및 $CO_2$포화도 분포를 예측할 수 있다.

• 가족자원경영과 정책
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• 제20권1호
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• pp.1-22
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• 2016

The purpose of this study is to propose measure for the effects of perceived parenting attitudes and emotional problems on life satisfaction among adolescents in single parent families with the parent resource perspective. The study consisted of 230 first grade middle school students from single parent (living with either mother or father only) families in the 4th year panel (2013) of the Korean Children and Youth Panel Survey (KCYPS), National Youth Policy Institute (NYPI). All statistical data analyses were performed using SPSS version 21.0. The findings of this study are as follows. First, lower levels of depression and aggression were found among adolescents who perceived parenting attitude as more affectionate. On the contrary, higher levels of depression and aggression were detected among adolescents who perceived parenting attitude as more intrusiveness. The more the inconsistent parenting practices perceived by adolescents, the higher the degree of depression. Second, a higher level of life satisfaction was found among adolescent who were more likely to perceive positive parenting attitudes including monitoring, affection and reasoning. However, there was no significant correlation between negative parenting behavior and life satisfaction. Third, a lower level of life satisfaction was observed among adolescent who were more likely to perceive emotional problems such as depression, aggression and social withdrawal. Fourth, according to the analysis on the effects of parenting attitudes and emotional problems on life satisfaction, affection parenting of all positive parenting styles and depression among emotional problems had an impact on life satisfaction. The more affectionate a parent is with his/her children in parenting, the lower the degree of depression in adolescents, and the lower degree of depression in adolescents, the higher degree of life satisfaction was found among adolescents from single parent households.

• 한국산림과학회지
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• 제103권2호
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• pp.240-247
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• 2014

본 연구는 황폐계류 복원지의 식생변화에 대한 시계열 분석을 통하여 복원기법 및 효과에 대해 고찰하고자 수행 되었으며, 수질정화습지와 월류보, 수생식물 복원지에서 복원 전, 후 식생변화를 2년간 모니터링 하였다. 복원 1년 후 월류보에서 초본류 증가와 수질정화습지에서 줄풀의 피복도 증가가 조사되었다. 식생 피복률은 복원직후 10~30% 감소되었고, 복원 1년 후 복원 전 수준으로 조사 되었다. 황폐계류 복원지의 식생변화는 복원 후 1년 경과시점부터 서식종수, 귀화률, 피복률이 증가하는 것으로 조사되었다.

• 한국정보과학회논문지:시스템및이론
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• 제37권4호
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• pp.246-255
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• 2010

CPU 자원이 다수의 가상머신에 의해 공유되는 Xen 가상화 환경에서는, CPU가 하나의 가상머신의 요청을 처리하는 동안 다른 가상머신은 CPU를 기다려야 하는 가상머신 스케줄링 지연이 존재한다. 가상화 환경에서 응용프로그램의 QoS 요구사항을 만족시키기 위하여 자원을 관리하는 대부분의 시스템은 가상머신의 자원 사용률과 가상머신에서 운영하는 응용프로그램의 성능을 모니터링하고 분석하여 자원을 재할당한다. 이 때 응용프로그램의 성능 분석을 위해 큐잉 모델 등과 같은 수학적인 모델링 기법이 사용되지만 비가상화 환경에서 사용되던 모델은 가상머신 스케줄링 지연을 고려하지 않으므로, 가상화 환경에서는 정확한 분석과 예측이 어렵고, 따라서 이를 기반으로 자원을 관리하는 시스템은 요구되는 응용프로그램의 성능을 제공하지 못할 수 있다. 따라서 본 논문에서는 Xen 가상화 환경에서 가상머신 스케줄링 지연을 반영하여 응용프로그램의 성능을 측정하고, 모든 가상머신이 일으킬 수 있는 스케줄링 지연을 최소화하는 방향으로 CPU 사용 우선순위를 설정하는 기법을 제안하고, 제안한 기법이 스케줄링을 고려하지 않은 방법에 비해 응용 프로그램의 성능을 향상시킴을 보인다.

• 한국IT서비스학회지
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• 제15권2호
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• pp.125-155
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• 2016

By reclassifying and reinterpreting the factor variables that were used in precedent studies on company informatization by research theme and perspective on them success factor, the present study tried to examine how different the factor variables are in frequency of use and by period, and how importantly they were considered by research theme and perspective on its success factor, combining them with the studies done on mechanism point of view. The key findings of this study are as follows. First, it was found that the frequency of using mechanism variables, which are reclassified based on SER-M perspective, has gradually increased since 1990s. While the frequency of using resource factors sharply increased in 1990s, it decreased from 2000s. It indicates that more studies were conducted of mechanism factors other than resource factors from the early 2000s. Second, when looking at those variables reclassified by research them, it was found that such theme as decision maker, environment, and resource factors were more used than other research themes in the studies on the measuring factors of informatization. Mechanism factors turned out most used among overall research themes. In particular, they were more frequently used in studies related to the performance of informatization. This result evidences that mechanism-related variables are more importantly considered in the studies than other factors. This study produces a practical implication: what factors companies have to manage and secure intensively to attain successful informatization. In addition, this study helps companies seeking informatization understand and take advantage of SER-M factors on the basis of knowledge in the transitional process of the factor variables used in studies by period. It is expected that CIO can use the key findings of this study in monitoring the factors by the stage of informatization.

• Journal of Species Research
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• 제9권4호
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• pp.532-535
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• 2020

A total of 527 species of birds have been recorded in Korea. We summarize the records of three genera and six species that have been newly reported in Korea, discovered through the avian monitoring programs carried out by The National Institute of Biological Resources from 2013 to 2016. These six newly recorded species are; Ring-necked Duck (Aythya collaris), Lesser Scaup (Aythya affinis), Bufflehead (Bucephala albeola), Black-winged Kite (Elanus caeruleus), Mongolian Lark (Melanocorypha mongolica) and Crested Myna (Acridotheres cristatellus). One Ring-necked Duck was observed on March 23, 2014 in Jungrangcheon Stream. One male Lesser Scaup was recorded on February 24, 2014 in Gyeongpoho Lagoon. A male bufflehead was first seen in Yeongrangho Lagoon on January 26, 2013. The Black-winged Kite was first observed on January 23, 2013 at the Gangseo Wetland Ecological Park. One Mongolian Lark was also recorded on May 11, 2016 and May 12, 2017 in Marado Island. The Crested Myna was first observed on April 20, 2016 in Seomando, Island.

• 정보처리학회논문지D
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• 제8D권5호
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• pp.613-622
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• 2001

디지털 자원에 대한 유통환경의 급속한 변화에 따라 디지털자원에 대한 지적재산권 보호 문제가 중요하게 대두되고 있다. 디지털자원의 접근과 이용에 대한 신뢰있는 환경을 만들기 위한 통합적인 접근방법으로 디지털저작권관리(DRM)기술에 대한 관심이 디지털컨텐츠 저자나 출판사, ISP를 중심으로 높아지고 있다. 본 논문에서는 현재의 디지털저작관리기술이 직면하고 있는 취약점인 정적인 저작권관리 문제와 해결과 감시 및 추적기능 보강을 위하여 적응형 에이전트 기술(ARPA : Adaptive Resource Protection Agent)에 기반한 동적 디지털저작관리 시스템을 제안한다. 여기에서 동적 디지털저작권 관리를 위하여 동적미션제어 기법이 적용되고 온라인 및 오프라인 상에서의 컨텐츠 보호와 감시를 위하여 적응형 에이전트 기술이 적용된다. 또한, 프로토타입시스템을 구현하여 동적으로 디지털저작권을 보호하는 과정을 보인다.

• 한국환경생태학회:학술대회논문집
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• 한국환경생태학회 2007년도 정기총회 및 학술논문발표회
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• pp.136-142
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• 2007

The main aim of this study is to estimate home-range of the Korean raccoon dog(Nyctereutes procyonoides koreensis) at a rural area of Gurye in the southern part of South Korea. A radio-tracking was regularly carried out on 4 raccoon dogs for 2 days every 2 months in 2006. During the days, the radio-tracking was usually conducted every 1-3 hours through day-time to night-time. Among the 4 raccoon dogs, 2 individuals(a permanent breeding pair) could be extensively tracked for 5 to 7 months, including all 4 seasons. The result showed that total home-range sizes of the pair were 0.732 $km^2$ and 0.373 $km^2$ for 100% minimum convex polygons(MCP) and 100% kernel(K), respectively, during the monitoring period. Mean home-range sizes of the 2 raccoon dogs were 0.035-0,688 $km^2$ and 0.012-0.341 $km^2$ for MCP and K, respectively. Yearly home-range sizes of the male and female were similar to each other. However, home-range sizes of the raccoon dogs between day-time and night-time were quite different. Furthermore, the raccoon dogs showed a much broader home-range size in spring, summer and fall than in winter season. Finally, the pair had a broad overlapping home-range(about 70-95%), and 1 core area and 4 different feeding areas.

• 한국전기전자재료학회논문지
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• 제24권6호
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• pp.519-524
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• 2011

ABLB (alternate binaural loudness balance) test is one of the medical assessments to diagnose detailed lesion of sensory-neural hearing loss based on a recruitment phenomenon. However, current ABLB audiometry takes an operational model, so called face-to-face model, in which model one audiometrist can assess only one subject at a time. As a result, this face-to-face model leads to expensive audiometrist's labor cost and lengthy wait when there exist many subjects. As a solution, this paper suggests an ABLB audiometry system supporting one-to-many model in which model an audiometrist enables to assess several subjects concurrently. By providing such capabilities as real-time transfer of assessment result, video monitoring of subject and video chat, this solution can provide same effect as face-to-face model but overcome weakness of the existing face-to-face model.