• Proceedings of the Korea Information Processing Society Conference
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• 2004.05a
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• pp.419-422
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• 2004

기업간 전자상거래가 협업 모델을 통해 확산되는 가운데, 국제 표준으로 제정된 ebXML과 민간 컨소시엄 주도로 진행되고 있는 웹서비스는 협업 B2B 부문의 대안으로 강력히 부상하고 있다. 일반 기업 및 사용자들은 시스템을 도입함에 있어 비용 대비 효과라는 측면과 기간 시스템과의 연동이라는 아키텍쳐 측면에서의 고려가 다 필요한 만큼 두개의 B2B 프레임웍을 다각도로 비교/분석해 보는 것은 의미가 있는 일이라 하겠다. 본고에서는 업무 프로세스의 정의 방법, 표준 데이터 구성방안, 서비스 등의 측면에서 양 프레임웍을 비교해 보고 장단점과 한계점을 짚어 보며 향후 B2B 프레임웍이 나아가야 할 방향에 대해 고찰해 보고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1022-1025
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• 2013

소프트웨어 개발자는 예전과 같이 PC 나 서버에서만 동작하는 소프트웨어만 만들어야 하는 것이 아니고, 스마트폰, 스마트패드, 스마트 TV, 스마트워치 등 개발해야 하는 플랫폼의 종류가 기하급수적으로 늘고 있다. 그러나 비용문제, 과열된 스타트업 시장으로 인한 채용문제로, 개발 초기 시 클라이언트, 네트워크, 데이터베이스에 숙련된 개발자를 충분히 보유하고 시작하는 경우는 드물다. 본 논문은 HTML 서비스, 실시간 네트워킹, 데이터베이스 CRUD를 지원하는 초보자도 사용하기 쉬운 새로운 언어를 소개한다. 우리는 언어 요구사항, 언어 산출물의 정의를 통하여 언어의 설계 및 구현을 한다. 실제로 실시간 네트워크 서버를 우리의 언어로 제작한 사례 연구를 통하여 우리의 언어가 우수하고 개발자의 노력대비 결과가 좋음을 보인다. 추후 이 언어를 활용하여 게임, 채팅 어플리케이션, 실시간 모니터링 등 특정 도메인에 맞는 어플리케이션을 개발자가 쉽게 작성할 수 있을 것이다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.10 no.1
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• pp.99-110
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• 2000

암호 시스템에서 가장 중요한 정보는 키 정보이다. 키가 손상되거나 유실되면 모든정보가 유실되기 때문이다. 키 위탁 시스템이란 유사시의 상황에 대비해서 키를 특정한 위탁기관에 위탁함으로써 정보를 암호의 오용이나 키의 분실로부터 보호 할 수 있는 시스템이다. 키 위탁 시스템은 유사시에 확실하게 키를 복원할 수 있어야 하며, 동시에 복구 정보의 안전한 보관이 이루어져야 한다. 그리고 위탁 시스템으로 인해 사생활이 침해되지 않는 것 또한 중요하다. 이러한 요구사항들은 서로 상충되는 점이 있기 때문에 모든 요구사항을 만족시키는 키 위탁 시스템을 설계하기는 매우 어렵다. 본 논문에서는 키 위탁 시스템 설계시에 고려해야 할 요소를 도출하고, 키 위탁 시스템 설계 및 분석을 위한 모델을 제안한다. 이 모델은 정의된 요구사항을 만족시키는 키 복구 시스템을 설계할 때 유용하게 사용될 수 있으며, 이미 제안된 키 복구 시스템을 분석하는 도구로 활용될 수 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2010.11a
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• pp.697-700
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• 2010

피부 이미지의 여러 가지 특징들 중 주름은 피부의 상태를 판단하는 중요한 요소이다. 따라서 주름을 추적하기 위해 확대경으로 촬영된 원본 이미지에서 질감 대비 증가, 노이즈 제거 등의 전처리 과정을 수행한 후 Watershed 알고리즘을 이용하여 주름을 선분으로 표현하였다. 이렇게 생성된 주름의 깊이, 너비, 길이 등은 피부 분석 시 특징 정보로 이용할 수 있다. 또한 주름과 주름이 연결되어 이루는 다각형을 논문에서는 셀(Cell)이라고 정의하는데 그것의 크기나 개수 같은 정보도 추출할 수 있게 된다. 그러나 주름으로 만들어진 셀들은 실제와 다르게 과분할 되는 경향을 보인다. 과분할 된 셀들은 잘못된 정보를 제공하기 때문에 피부 상태를 판단하는 결과의 정확도를 떨어뜨린다. 본 논문에서는 이러한 문제점을 인지하고 차후 정확한 셀 정보를 획득하기 위한 확장성 측면에서 각 셀들을 개체화시키고 과분할 된 셀을 검출하는 방법을 제안한다.

• Annual Conference on Human and Language Technology
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• 2020.10a
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• pp.32-36
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• 2020

문장의 의미를 잘 임베딩하는 문장 인코더를 만들기 위해 비지도 학습과 지도 학습 기반의 여러 방법이 연구되고 있다. 지도 학습 방식은 충분한 양의 정답을 구축하는데 어려움이 있다는 한계가 있다. 반면 지금까지의 비지도 학습은 단일 형식의 말뭉치에 한정해서 입력된 현재 문장의 다음 문장을 생성 또는 예측하는 형식으로 문제를 정의하였다. 본 논문에서는 위키피디아, 뉴스, 지식 백과 등 문서 형태의 말뭉치에 더해 지식인이나 검색 클릭 로그와 같은 구성이 다양한 이종의 대량 말뭉치를 활용하는 자기 지도 학습 방법을 제안한다. 각 형태의 말뭉치에 적합한 자기 지도 학습 문제를 설계하고 학습한 경우 KorSTS 데이셋의 비지도 모델 성능 평가에서 기준 모델 대비 7점 가량의 성능 향상이 있었다.

• The Journal of Engineering Geology
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• v.29 no.1
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• pp.51-68
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• 2019

This study performs to evaluate adaptability of seashore filtering type seawater-intake which adapts dua1 filter well alternative for direct seawater-intake. This study varies filter condition of seashore free surface aquifer which is composed of sand layer then installs real size dual filter well and single filter well to evaluate water permeability and proper pumping amount according to filter condition. According to result of step aquifer test, it is analysed that 110.3% synergy effect of water permeability coefficient is happened compare to single filter since dual filter well has better improvement. dual filter has higher water permeability coefficient compare to same pumping amount, this means dual filter has more improved water permeability than single filter. According to analysis result of continuous aquifer test, it is evaluated that dual filter well (SD1200) has higher water permeability than single filter well (SS800) by analysis of water permeability coefficient using monitoring well and gauging well, it is also analysed dual filter has 110.7% synergy effect of water permeability coefficient. As a evaluation result of pumping amount according to analysis of water level dropping rate, it is analysed that dual filter well increased 122.8% pumping amount compare to single filter well when water level dropping is 2.0 m. As a result of calculating proper pumping amount using water level dropping rate, it is analysed that dual filter well shows 136.0% higher pumping amount compare to single filter well. It is evaluated that proper pumping amount has 122.8~160% improvement compare to single filter, pumping amount improvement rate is 139.6% compare to averaged single filter. In other words, about 40% water intake efficiency can be improved by just installation of dual filter compare to normal well. Proper pumping amount of dual filter well using inflection point is 2843.3 L/min and it is evaluated that daily seawater intake amount is about $4,100m^3/day$ (${\fallingdotseq}4094.3m^3/day$) in one hole of dual filter well. Since it is possible to intake plenty of water in one hole, higher adaptability is anticipated. In case of intaking seawater using dual filter well, no worries regarding damages on facilities caused by natural disaster such as severe weather or typhoon, improvement of pollution is anticipated due to seashore sand layer acts like filter. Therefore, It can be alternative of environmental issue for existing seawater intake technique, can save maintenance expenses related to installation fee or damages and has excellent adaptability in economic aspect. The result of this study will be utilized as a basic data of site demonstration test for adaptation of riverside filtered water of upcoming dual filter well and this study is also anticipated to present standard of well design and construction related to riverside filter and seashore filter technique.

• Communications for Statistical Applications and Methods
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• v.16 no.4
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• pp.627-637
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• 2009

Our economic system highly depends on the international trade market and demands high level of foreign language abilities to the young generation. Scores of various internationally authorized language tests are used to estimate students's language ability before giving their admission to universities or high schools. According to increase of unemployment rate of the young people, universities put their strength on the language abilities of their students, and each university uses some authorized language scores before determining students who win scholarships. This study suggests two types of indices to evaluate students's relative achievement of foreign language abilities between two time points considering their current abilities. One, named one-side relative achievement index, is defined as the ratio of additional score between two time points to the remaining score at the base time point to the full score. The second one, named two-side relative achievement index, is defined as the same manner as the first one if the score is improved, and if not, is defined as the ratio of the amount of losing scores to the current score at the base time point. Two-side achievement index is more useful since it has smaller variation than the former and is easier to interpret. However, both indices are useful to compare the achievements of different tests.

• Journal of the Korean Geographical Society
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• v.51 no.6
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• pp.873-892
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• 2016

2015 was the seventieth year from the liberation and the division of Korean peninsular. Although the research on the unification has been performed in various interdisciplinary fields since the liberation of Korea, the geographic research on the unification based on the space stays in a minority. It is time to wrap up the literatures and discourses centered on geography for preparing the unification and taking a view of Korean territory of future unification. The starting point is to define the concept of the geography for unification and give careful consideration to the geographic research trends related to the unification that has been achieved since the liberation of Korea. The geography for unification should be understood in the concept of time and space. First of all, the geography for unification can be composed of the stages such as the research for unification, the research for unification impact, the research for united Korea, and the geopolitics of East Asia under the concept of time. It also can be divided into the regions such as Korea, North Korea, borderlands between North Korea-China and North Korea-Russia including South and North Korea, and North East Asia and Pan Pacific Ocean. The geographic research on the unification embracing the concept of time and space can be defined as the geography for unification. The purpose of this study is to elicit the concept and the research field of the geography for unification in the perspective of discourse, investigate the research trends by geographic themes, and suggest the agendas of the geography for future unification.

• Journal of Korean Society of Disaster and Security
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• v.14 no.1
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• pp.61-72
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• 2021

There is an increasing need for water supply plan using sustainable groundwater to resolve water shortage problem caused by drought due to climate change and artificial aquifer recharge has recently emerged as an alternative. This study deals with recharge potential assessment for artificial recharge system and quantitative assessment for securing stable water and efficient agricultural water supply adapt to drought finding optimal operating condition by numerical modeling to reflect recharge scenarios considering climate condition, target water intake, injection rate, and injection duration. In order to assess recharge potential of injection well, numerical simulation was performed to predict groundwater level changes in injection and observation well respect to injection scenarios (Case 1~4) for a given total injection rate (10,000 m³). The results indicate that groundwater levels for each case are maintained for 25~42 days and optimal injection rate is 50 m³/day for Case 3 resulted in groundwater level rise less than 1 m below surface. The results also show that influential area of groundwater level rise due to injection was estimated at 113.5 m and groundwater storage and elapsed time were respectively increased by 6 times and 4 times after installation of low permeable barrier. The proposed assessment method can be contributed to sustainable agricultural water supply and stable water security for drought adaptation.

• Journal of Korean Society of Disaster and Security
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• v.9 no.2
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• pp.1-7
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• 2016

The 'alert' is to provide a signal or information beforehand, in order to prepare against situations in which abrupt incidents or disasters are expected. In other words, the purpose of alert is to help people or respondents to take precautions against and quickly cope with disasters or incidents, before those actually occur. This paper draws requirements of alert system from definitions of the alert and cases of it home and abroad. Following requirements of alert system are derived to allow subjects responsible for alert issue to quickly handle changes of situations; 1) identification of subjects responsible for alert issue, 2) use of definite terms regarding alert levels, for prompt actions, and 3) distinct separations among alert levels. This paper suggests improvement directions by extracting several problems of National Crisis Alert System according to such requirements.