• 대한원격탐사학회지
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• 제37권3호
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• pp.409-418
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• 2021

토지피복도는 국토정책, 환경정책을 위한 의사결정 근거 자료로 활용되는 매우 중요한 자료이다. 토지피복도는 원격탐사 자료를 활용하여 제작되는데, 이때 사용되는 데이터의 취득 시기에 따라 동일한 지역을 대상으로 하더라도 분류 결과가 달라질 수 있다. 본 연구에서는 단시기 데이터의 분류 정확도를 개선하기 위해 다중시기 위성영상을 활용하였으며 계절에 따른 지표면의 분광 반사 특성 차이를 딥러닝 알고리즘의 하나인 U-Net 모델에 학습시켜 분류하였다. 또한 단시기 분류 결과와 정확도 비교를 통해 분류 정확도의 향상 정도를 비교하였다. 구역 내에 30%의 녹지와 한강을 포함하여 다양한 토지피복으로 이루어진 서울특별시를 연구대상지로 설정하고 2020년 분기별 Sentinel-2 위성영상을 산출하였다. 대한민국 환경부에서 작성한 세분류 토지피복도를 활용하여 U-Net 모델을 학습시켰다. 학습한 U-Net 모델을 통해 단시기, 2시기, 3시기, 4시기로 모델을 학습하여 분류한 결과, 단시기를 제외하고 토지피복도 분류 정확도 확보기준인 75%를 상회하는 81%, 82% 79%의 정확도를 나타냈다. 이를 통해 다중 시계열 학습을 통해 토지피복의 분류 정확도 향상이 가능하다는 것을 확인하였다.

• 에너지공학
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• 제15권1호
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• pp.74-81
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• 2006

이 연구에서는 해석적 계층과정 기법 및 설문조사를 바탕으로 다중기준 평가기준에 따라서 여러 가지 전력생산 시스템들을 종합적으로 비교할 수 있는 비교지표의 평가체계를 개발하였다. 의사결정 문제를 계층구조로 파악하는 해석적 계층과정 기법은 설문조사로 얻어진 주관적 견해를 추출하는 데 아주 용이하다. 여기서, 종합선호도는 판단기준의 가중치와 대안의 평가치가 선형적으로 결합되어 얻어진다. 대표적 전력생산 시스템들은 국내 전력공급의 대부분을 차지하고 있는 전통적인 원자력, 석탄(유연탄), 중유, LNG 발전소, 수력 발전원 등이 선정되었고, 덧붙여 최근에 관심거리인 재생에너지 시스템으로는 우리나라에서 대표적인 풍력, 태양광 발전원 등이 포함되었다. 시범연구의 결과에 따르면, 종합적인 비교지표로 1) 평가기준 간 상대적 중요성을 비교하기 위해 에너지 시스템의 4가지 대-평가기준의 가중치, 11가지 소-평가기준의 가중치, 2) 평가기준별 에너지 시스템의 효용성을 비교하기 위해 7가지 에너지 시스템의 선호평가치, 3)우선순위를 판단하기 위해 종합점수 등이 제시된다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권17호
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• pp.7731-7736
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• 2015

Background: Breast cancer usually shows a slow development rate and when it is recognized in early stages very successful treatment results can be achieved. This research was planned to research the health beliefs of nursing faculty students about breast cancer and breast self-examination (BSE). Materials and Methods: The first class students of nursing faculty formed the basis for this descriptive research (N=347). Sample selection was not made and all female students who wanted to participate voluntarily in the research during March-May of 2014 were included (n=331). Results: It was determined that 85.5% of students had knowledge about cancer, 79.5 % knew of breast cancer, and 65.3% were aware of how BSE is performed. According to the responses of students to the scale of the health belief model that is used to determine the health beliefs of students, item-point averages of trust and obstacle sub-dimensions were high. Conclusions: It is determined that more than half of students had knowledge about breast cancer and breast self-examination. Their health beliefs were affected by trust and obstacle perceptions, knowledge level about cancer, and awareness about how BSE is done. These factors should be considered in planning trainings that will be given to students. Social responsibility projects should have designed to create the awareness that cancer is a treatable disease.

• 한국환경복원기술학회지
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• 제18권2호
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• pp.33-44
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• 2015

This study was performed to propose the site selection plan for the restoration of the target Narrow-mouth Frog(Kaloula borealis) habitat, and has developed the AHP model to select the optimal site for narrow-mouth frog habitat restoration on the basis of the narrow-mouth frog Habitat Suitability Index (HSI) items (factors and variables). The assessment areas were established by the narrow-mouth frog HSI factors such as space, feed, cover, water(breeding), threatening factors and others, and the sub-assessment items by each assessment area were established based on the narrow-mouth frog HSI variables. The weighting values of the assessment areas and items were calculated by the developed AHP method. The weighting values of the 5 assessment areas were arranged in order as cover(0.283), water(breeding)(0.276), feed(0.230), space(0.147), and threatening factor(0.064). The final weighting values of the 14 assessment items were arranged in order of height as low-rise grassland(0.190), soil quality(0.178), and stones and between the stones(0.105). The scoring criteria according to the assessment items and factors were marked and applied by equal intervals considering the criteria by HSI items of the narrow-mouth frog and finally the scoring criteria diagram has been proposed for the optimal site selection of the narrow-mouth frog habitat restoration.

• Asian Pacific Journal of Cancer Prevention
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• 제15권2호
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• pp.605-610
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• 2014

Chronic liver diseases, including cancer, are characterized by inflammation and elevated serum ferritin (SF). However, the causal-relationship remains unclear. This study used primary rat hepatic stellate cells (HSC) as a model to investigate effects of physiological SF concentrations (10, 100 and 1000 pM) because HSCs play a central role in the development and progression of liver fibrosis. Physiological concentrations of SF, either horse SF or human serum, induced pro-inflammatory cytokine $IL1{\beta}$, IL6 and $TNF{\alpha}$ secretion in rat activated HSCs (all p<0.05). By contrast, treatment did not alter activation marker ${\alpha}SMA$ expression. The presence of SF markedly enhanced expression of Grp78 mRNA (p<0.01). Furthermore, transient knock down of Grp78 by endotoxin EGF-SubA abolished SF-induced $IL1{\beta}$ and $TNF{\alpha}$ secretion in activated HSCs (all p<0.05). In conclusion, our results showed that at physiological concentrations SF functions as a pro-inflammatory mediator in primary rat HSCs. We also provide a molecular basis for the action of SF and identified Grp78-associated ER stress pathways as a novel potential therapeutic target for resolution of fibrosis and possible prevention of liver cancer.

• 한국환경복원기술학회지
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• 제18권3호
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• pp.109-118
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• 2015

This study was performed to propose the site selection plan for the restoration of the target Reeve's turtle (Maunemys reevesii) habitat and has developed the AHP model to select the optimal site for Reeve's turtle habitat restoration on the basis of the Reeve's turtle Habitat Suitability Index (HSI) items (factors and variables). The assessment areas were established by the Reeve's turtle HSI factors such as breeding space, feed, cover, water, threatening factors and others and the sub-assessment items by each assessment area were established based on the Reeve's turtle HSI variables. The weighting values of the assessment areas and items were calculated by the developed AHP method. The weighting values of the 5 assessment areas were arranged in order as breeding space(0.293), food(0.273), water(0.217), cover(0.113), and threatening factor(0.104). The final weighting values of the 17 assessment items were arranged in order of height as all kind of food(0.222), water depth(0.096), altitude of spawning ground(0.093). The scoring criteria according to the assessment items and factors were marked and applied by equal intervals considering the criteria by HSI items of the Reeve's turtle and finally the scoring criteria diagram as been proposed for the optimal site selection of the Reeve's turtle habitat restoration.

• 인터넷정보학회지
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• 제14권3호
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• pp.68-77
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• 2013

This article consists of 3 parts. Part I is multi stakeholder approach on Internet governance system. Part II is analysis of the Korean Internet governance system. In this part, I explain relevant laws in Korea, including Korean Internet Address Resources Act. Part III is my suggestion on Korean Internet governance system using a multi stakeholder approach. First of all, the keyword of the Internet governance system is decision making process: that is, consensus based versus top-down approach. Then who are major players in Internet governance in national level? Government, or Private sectors such as business and civil society. Korean legal system for Internet governance shows a top-down decision making process. Major players are the government (that is, Ministry of Science, ICT and Future Planning) and KISA affiliated with the government. Other players include Internet Address Policy Committee, Korea Internet Governance Alliance, and NGOs. The key statute for Internet governance in Korea is Internet Address Resources Act of 2004. Articles 3 and 5 require the Ministry of Science, ICT and Future Planning to take a proactive role in Internet governance. The government shall consult with the Internet Address Policy Deliberation Committee for Internet governance. Yet this Committee is established under the control of the Ministry of Science, ICT and Future Planning. All members of this Committee are also commissioned or nominated by the Chairman of the Ministry. Meanwhile, there are also non-official organizations, including Sub-committee on Address & Infrastructure of Korea Internet Governance Alliance. I suggest to reform decision making process of Korean Internet governance system based on BOTTOM-UP process for CONSENSUS BASED DECISION. My suggested system includes the following: (1) The government hands over a major role in Internet governance to INDEPENDENT Internet policy organization. And the government participates in such organization as ONE of the players. (2) Nomination of this committee member must be bottom-up process for a genuine multi-stakeholder model including civil society, commercial organization, end-users and experts. (3) The government should establish plan for supporting the private sector's international activity on the long-term basis.

• Nuclear Engineering and Technology
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• 제40권3호
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• pp.199-212
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• 2008

A small-break loss of coolant accident (SB-LOCA) test with a break size equivalent to a 3-inch cold leg break of the APR1400 was carried out as the first transient integral effect test using the ATLAS (Advanced Thermal-hydraulic Test Loop for Accident Simulation). This was the first integral effect test to investigate the integral performance of the test facility and to verify its simulation capability for one of the design-basis accidents. Reasonably good thermal hydraulic data was obtained so that an integral performance of the fluid sub-systems was identified and control performance of the ATLAS was confirmed under real thermal hydraulic conditions. Based on the measured data, a post-test calculation was carried out using the best-estimate thermal hydraulic safety analysis code, MARS 3.1, and the similarity between the expected and actual data was investigated. On the whole, the post-test calculation reasonably predicts the major thermal hydraulic parameters measured during the SB-LOCA test. The obtained data will be used to enhance the simulation capability of the ATLAS and to improve an input model of the ATLAS for simulation of other target scenarios.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2019년도 학술발표회
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• pp.407-407
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• 2019

According to Asian Development Bank report Pakistan is among water scarce countries. Climate scenario on the basis IPCC fifth assessment report (AR5) revealed that annual mean temperature of Pakistan from year 2010-2019 was $17C^o$ which will rise up to $21C^o$ at the end of this century, similarly almost 10% decrease of annual rainfall is expected at the end of the century. It is a changing task in underdeveloped countries like Pakistan to meet the water demands of rapidly increasing population in a changing climate. While many studies have tackled scarcity and stream flow forecasting of the Upper Indus Basin (UIB) Pakistan, very few of them are related to socio-economic and climate change impact on sustainable water management of UIB. This study investigates the pattern of current and future surface water availability for various demand sites (e.g. domestic, agriculture and industrial) under different socio-economic and climate change scenarios in Upper Indus Basin (UIB) Pakistan for a period of 2010 to 2050. A state-of-the-art planning tool Water Evaluation and Planning (WEAP) is used to analyze the dynamics of current and future water demand. The stream flow data of five sub catchment (Astore, Gilgit, Hunza, Shigar and Shoyke) and entire UIB were calibrated and validated for the year of 2006 to 2011 using WEAP. The Nash Sutcliffe coefficient and coefficient of determination is achieved ranging from 0.63 to 0.92. The results indicate that unmet water demand is likely to increase severe threshold and the external driving forces e.g. socio-economic and climate change will create a gap between supply and demand of water.

• 한국콘텐츠학회논문지
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• 제19권8호
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• pp.194-204
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• 2019

본 연구의 목적은 디지털콘텐츠 산업과 블록체인 기술의 융합 생태계가 활성화 될 수 있도록 산업 이해관계자들이 상호 활용 가능한 ICO의 핵심요인과 관련된 선행연구를 정리하고, 요인별 중요도를 산출하는 데 있다. 이에 선행연구에서 도출된 핵심요인을 바탕으로 계층구조모델을 구조화하고 AHP 방법론을 활용하여 각 요인의 가중치를 도출하였다. 상위요인에서는 사업(0.422) > 기술(0.172) > 콘텐츠(0.144) > 인력(0.104) > 제도(0.099) > 토큰(0.059) 순으로 중요하게 나타났다. 하위요인에서는 가중치 내림차순으로 실현가능성(0.162) > 법률규제(0.071) > 시장성장성(0.063) 등으로 나타나 각각의 시사점을 기술하였다. 본 연구의 결과는 ICO 발기자뿐만 아니라 투자자 입장에서도 활용될 수 있을 것이며, 산업적 초기 단계에 속하는 블록체인 융합생태계의 학문적 토대를 제공할 수 있을 것이다.