• Current Research on Agriculture and Life Sciences
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• 제30권2호
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• pp.97-104
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• 2012

Over the last century, drainage systems have become an integral component of agriculture. Climate observations and experiments using General circulation models suggest an intensification of the hydrologic cycle due to climate change. This study presents hydrologic simulations assessing the potential impact of climate change on subsurface drainage in Daegu, Republic of Korea. Historical and Long Ashton Research Station weather generator perturbed future climate data from 15 general circulation models for a field in Daegu were ran into a water management simulation model, DRAINMOD. The trends and variability in rainfall and Soil Excess Water ($SEW_{30}$) were assessed from 1960 to 2100. Rainfall amount and intensity were predicted to increase in the future. The predicted annual subsurface drainage flow varied from -35 to 40 % of the baseline value while the $SEW_{30}$ varied from -50 to 100%. The expected increases in subsurface drainage outflow require that more attention be given to soil and water conservation practices.

• 한국컴퓨터정보학회논문지
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• 제23권9호
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• pp.81-86
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• 2018

Software defect severity is very important in projects with limited historical data or new projects. But general software defect prediction is very difficult to collect the label information of the training set and cross-project defect prediction must have a lot of data. In this paper, an unclassified data set with defect severity is clustered according to the distribution ratio. And defect severity-based prediction model is proposed by way of labeling. Proposed model is applied CLAMI in JM1, PC4 with the least ambiguity of defect severity-based NASA dataset. And it is evaluated the value of ACC compared to original data. In this study experiment result, proposed model is improved JM1 0.15 (15%), PC4 0.12(12%) than existing defect severity-based prediction models.

• 한국유기농업학회지
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• 제28권4호
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• pp.459-475
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• 2020

This study analyzes weather derivatives as an alternative risk management tool to stabilize farm revenue to complement the existing crop insurance program which suffers from asymmetric information problems such as adverse selection, moral hazard, and verifiability. We estimated apple yield functions to observe the relationship between yields and weather indices such as temperature and precipitation. Based on the estimated yield functions we designed weather futures and options products underlying temperature and precipitation, and calculated the prices of futures and options by two different approaches, historical distribution and Monte Carlo simulation. We found that weather futures and options stabilize farm revenue based on the estimated four risk indicators: Coefficient of Variation, Value at Risk, Certainty Equivalence, and Risk Premium. As a result, weather derivatives could be considered as a potential farm risk management tool through studying more in legal and institutional strategies and developing various derivatives products.

• 교육시설 논문지
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• 제26권1호
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• pp.3-8
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• 2019

Most of the unused facility in urban areas is perceived as an unreasonable space that damages cityscapes. However, unused space has the advantage of having historical value and potential for new development. In consideration of this, various plans have recently been made in terms of cultural use of unused space. The core is the performing arts culture space where various expressions can be expressed. Changes in the educational space that meet the various conditions required in future societies are also one of the topics to be discussed. In this study, we analyze the performance facilities utilizing the unused space and study the direction of educational facilities based on performance.

• 대한건축학회논문집:계획계
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• 제34권2호
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• pp.75-83
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• 2018

Ami-dong, known as Tombstone Village, was generated by refugees after Korean war on the site of Japanese public cemetery which had been originally constructed during Japanese occupation. Since then, the village has been expanded as low-income class neighborhood during Modernization and Industrialization Period from 1960s to 1980s. This study try to find the impact of the Japanese cemetery on the spatial structure of the village by analyzing and comparing the street structure and spatial layout of the Japanese cemetery and current Tombstone Village. The final objective of this study is to confirm the continuity of built environment, historical value and place identity of of the village.

• Communications for Statistical Applications and Methods
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• 제28권2호
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• pp.171-188
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• 2021

Due to an increased demand for longevity risk analysis, various stochastic models have been suggested to evaluate uncertainly in estimated life expectancy and the associated value of future annuity payments. Recently updated data allow us to analyze mortality for a longer historical period and extended age ranges. This study followed up previous case studies using up-to-date empirical data on Korean mortality and the recently developed R package StMoMo for stochastic mortality models analysis. The suitability of stochastic mortality models, focusing on retirement ages, was investigated with goodness-of-fit, validity of models, and ability of generating reasonable sets of simulation paths of future mortality. Comparisons were made across various types of models. Based on the selected models, the variability of important estimated measures associated with pension, annuity, and reverse mortgage were quantified using simulations.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.935-940
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• 2005

This paper presents the results of a statistical analysis using historical data of cost contingency. As a result, a model that predicts and estimates an accurate cost contingency value using the least squares estimation method was developed. Data such as original contract amounts, estimated contingency amounts set by maximum funding limits, and actual contingency amounts, were collected and used for model development. The more effective prediction model was selected from the two developed models based on its prediction capability. The model would help guide project managers making financial decisions when the determination of the cost contingency amounts for multiple projects is necessary.

• 대순사상논총
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• 제19권
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• pp.165-192
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• 2005

The purpose of this paper is to make clear the relation of traditional religion with economic ethics and attitude in Japan. I selected Shimhak(心學) of Japanese traditional religions to analyze because it has been said that Shimhak was related to the modern ethics of merchants in Japan. The contents of this paper is composed of two parts. First, the religious character of Shimhak is discussed. I will analyze the relation of Shinto, Buddhism and Confucianism to Shimhak to certify the syncretism of Japanese religion. Second, the economic ethics of Shimhak is discussed. I will make clear the historical significance of Shimhak in modern Japan, and the relation of the economic ethics of Shimhak with the spirit of Japanese capitalism. This paper will be useful to make out the social influence of Japanese traditional religion, to estimate the sustaining mode of traditional value and ethics in Japan in the future.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.451-458
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• 2013

This research documents the initial findings and recommendations for developing a risk management tool to assess and quantify the risks associated with the construction of the next generation of nuclear power plants. The proposed tool builds upon the Construction Industry Institute's International Project Risk Assessment (IPRA) Best Practice. This paper provides an overview of the investigation to assess the unique risk elements pertaining to nuclear power plant construction and documents the preliminary findings from historical project performance data to better understand the function and use of the IPRA's Relative Impact value.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2023년도 추계학술대회
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• pp.157-159
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• 2023

2023년 8월 등대문화유산으로 지정된 어룡도등대의 역사성을 알리고 친수공간으로 활용하기 위해, 등대의 기능의 원활히 유지하기 위해 시설물을 개량하고 친수공간으로 활용하기 위해 건축물 등을 보강하여 어룡도등대의 역사적 가치를 국민에게 알리고, 등대의 본연의 역할인 해상교통안전에 만전을 기하고자 한다.