• Korean Journal of Social Welfare
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• v.59 no.2
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• pp.5-38
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• 2007

This study attempts to develop a theory on the evolving process of wealthy major donors' sharing lives in Korea through a grounded theory approach. To conduct this study, the researchers have in-depth interviews with 11 exemplary wealthy major donors who have more than one million US dollars in his or her own asset and donate more than ten thousand US dollars annually. In data analysis, this study identifies 161 concepts on the evolving process of wealthy major donors' sharing lives; and the concepts are categorized with 33 sub-categories and 14 categories. In the paradigm model on the evolving process of wealthy major donors' sharing lives, it is identified that the central phenomenon, 'practicing sharing lives as noblesse oblige', is related with the causal conditions such as 'learning through memories and observation', 'realizing my duties', and 'emphasizing'; and the central phenomenon is related with the contingent conditions such as 'being sensitive to external evaluation', 'having limited information on giving', 'distrusting donation related environments'. The action/interactional sequences such as 'utilizing relationships' and 'strengthening active participation' are accomplished by moderating conditions such as 'having internal and external supports' and 'guiding by firm conviction'. It reveals that as a result, wealthy major donors enjoy the feeling of becoming a ideal and true wealthy person, establish sharing lives as firm and major parts of overall lives, and experience strong desires for better future and society. In this study, 'generous sharing that shares personal heritages and social benefits' is analyzed as a core category; it shows that sharing of wealthy major donors is related to the characteristics of generosity practice based on moral self-benefiting rather than complete altruistic characteristics or self-sacrificial characteristics. The process analysis reveals that it has the following stages: first, initial giving by exposure to causes or requests; second, routine practice of giving; third, evolution of practice of giving with gradual expansion in quantities and qualities; and fourth, living with giving. In the process, the following four types are identified: devoted wealthy donors for sharing, wealthy donors practicing sharing in daily life, wealthy donors practicing sharing with learning on external stimulus, and wealthy donors practicing sharing on empathy. Finally, this study discusses both meanings of identifying and developing a theory on the evolving process of wealthy major donors' sharing lives and implications of the research results in cultivating and developing potential wealthy major donors in Korea.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.89-89
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• 2022

하천 합류부에 지천이 유입되는 경우 복잡한 3차원적 흐름 구조를 발생시키고 이로 인해 유사혼합 및 지형 변화가 활발히 발생하게 된다. 특히, 하천 합류부에서 부유사 거동은 하천의 세굴과퇴적, 하천 지형 변화, 하천 생태계, 하천구조물 안정성 등에 직접적으로 영향을 미치기 때문에 이에 대한 정확한 분석이 하천 관리 및 재해 예방에 필수적인 요소이다. 기존의 하천 합류부 부유사 계측 자료들은 재래식 채취 방식으로 수행되어 시공간적 해상도가 매우 낮아서 실측 자료만으로 합류부에서 부유사 혼합을 분석하기에는 한계가 존재하기에 대하천의 부유사 혼합 거동 해석에 수치모형이 주로 활용되어 왔다. 본 연구에서는 하천 합류부에서 부유사 거동을 공간적으로 정밀하게 분석하기 위해 드론 기반초분광 영상을 활용하여 하천 합류부에 최적화된 부유사 계측 방법론을 제시하였다. 현장에서 계측한 초분광 자료와 부유사 농도간의 관계를 구축하기 위하여 기계학습모형인 랜덤포레스트(Random Forest) 회귀 모형과 합류부에서 분광 특성이 다른 두 하천의 특성을 정확하게 반영하기 위한 가우시안 혼합 모형 (Gaussian Mixture Model) 기반 초분광 군집화 기법을 결합하였다. 본 연구에서 구축한 방법론을 낙동강과 황강의 합류부에 적용한 결과, 초분광 군집을 통해 두하천 흐름의 경계층을 명확히 구별하였으며, 이를 바탕으로 지류와 본류에 대해 각각 분리된 회귀 모형을 구축하여 복잡한 합류부 근역 경계층에서의 부유사 거동을 보다 정확하게 재현하였다. 또한 나아가서 재현된 고해상도의 부유사 공간분포를 바탕으로 경계층에서 강한 두 흐름이 혼합되어 발생한 와류(Wake)가 부유사 혼합에 미치는 영향을 규명하였고, 하천 합류부에서 발생하는 전단층의 수평방향 대규모 와류가 부유사 혼합 양상에 지배적 영향을 미치는 것으로 확인하였다.

• Korean Journal of Social Welfare
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• v.66 no.3
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• pp.231-251
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• 2014

Recently, Korean government documented the plan to cope with the situation related to rich pensioners of Basic old-age pension. The purpose of this paper is to verify that how many rich pensioners are existing and to evaluate government reform plan's validity and effect. Main results are as follows; firstly, if the definition of rich pensioners is on the top 10%, the proportion of them would form 2.9% of total. And then, an amount of expenditure for them is only 2.6% of total. Secondly, in terms of disposable income, debt, and transfer income from child, the household who would be applied by government's plan is not richer than other household who is in the same living standard. And then, if the government's plan enforced, the effect might be very small. Lastly, the plan of government will discriminate against persons who support their parent. As a result, Basic old-age pension will be worsen. This paper should underline that the government's reform is only the 'hidden' retrenchment strategy in order to introduce a standard of the obligation to support own parent in the state without scientific prediction and serious discussion of negative public opinion. That is why, this is the same as the 'Trojan Horse'.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.250-250
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• 2015

ASR(Aquifer Storage Recharge) 또는 ASTR(Aquifer Storage Transfer Recharge)과 같은 직접적인 지하수 인공함양기법은 대수층을 활용하여 수자원을 공급하고 관리하기 위한 적극적인 방안으로 고려될 수 있다. 그러나 하천 수와 같은 지표수를 주입할 경우 부유물질 그리고 생물학적 및 화학적 물질 등에 의해 주입정 내 스크린 부분에서 폐색이 발생할 수 있으며, 이로 인해 인공함양 시설의 운영에 있어 부정적인 영향을 미칠 수 있다. 주입정 내 폐색을 저감시키기 위해서는 주기적인 주입정 역세척과 같은 방법이 적용될 수 있다. 본 연구에서는 물리적인 폐색을 발생시키는 부유물질이 포함되어 있는 지표수를 주입할 경우 주입정 내에서의 부유물질의 거동을 수치적 기법을 통해 모의 및 분석을 수행하였다. 본 모의에서는 부유물질을 구성하는 입자들은 세 가지 서로 다른 비중(0.8, 1.3, 1.5)을 가지며, 각각의 경우에 대해 입자분포는 정규분포를 통해 발생시켰다. 비중이 서로 다른 부유입자들은 동시에 주입정 내로 주입된다고 가정하였다. 모의는 비정상상태 조건으로 수행되었으며, 시간에 따라 변화되는 주입정 내 부유물질의 거동에 대해 분석하였다.

• Food Industry
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• s.98
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• pp.59-60
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• 1989

• Korean Journal of Ecology and Environment
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• v.35 no.3 s.99
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• pp.172-180
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• 2002

Leaf litter breakdown rates of the Phragmites australis, Zizania latifolia and Typha angustifolia were determined at the lower Nakdong River from Nov. 1998 to Sept. 1999. The relationship between leaf litter breakdown of three and abundance of aquatic invertebrates was investigated. Aquatic invertebrates collected in the litterbags were 11 family, 11 species (mean density: $222\;ind./m^2$ , n = 792), and Chironomidae was dominant. Mean density of Chironomidae in the litterbags were different according to the aquatic plant species: Z. latifolia ($180\;ind./m^2$, n = 264) T. angustifolia ($187\;ind./m^2$, n = 264) P. australis ($95\;ind./m^2$, n = 264). The breakdown of Z. latifolia was the shortest, and that of T. angustifolia was shorter than P. australis. Overall, the breakdown rate at floating layer was faster than that of submerged layer in all of three species and differences of the breakdown rate between open bags and closed three species and differences of the breakdown rate between open bags and closed bags were not found.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.72-72
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• 2018

우리나라의 대형 저수지에 담수된 수체는 여름에 온도가 높은 표수층과 온도가 낮은 심수층, 그리고 두 층 사이에서 온도가 크게 변화되는 변온층으로 나뉘게 된다. 여름 홍수기에 상류 하천에서 저수지로 유입되는 부유사는 큰 밀도를 가지기 때문에 저수지의 바닥을 타고 하층 밀도류의 형태로 저수지 하류로 전파된다. 그러나 밀도류가 성층화된 저수지의 변온층에 도달하면 심수층과 변온층 하층의 낮은 온도로 인해 발생하는 수체의 큰 밀도로 하층으로 더 침투하지 못하고 변온층이나 심수층 상층에서 남아 하류에 중층밀도류의 형태로 전파된다. 대량의 탁수를 하류에 방류하면 하류 수질에 문제가 발생되며 저수시키면 댐 수질 및 심수층 생물체의 태양광 차단 문제가 발생되므로 저수지에서 밀도류의 조절은 대형 저수지 운영에 매우 중요한 사항이다. 따라서 본 연구의 목적은 층적분 모형을 사용하여 대형 저수지에서 발생하는 중층밀도류의 전파 및 선택취수시설을 이용한 밀도류의 차단과 방류에 대해 수치모의하는 것이다. 이를 위하여 중층 밀도류를 수치모의하기 위한 1차원 수치모형을 제시하였으며 소양강댐 상류 소양호에 적용하여 적용성을 검토하고 밀도류의 전파 및 방류에 대해 분석하였다.

• Journal of forensic and investigative science
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• v.2 no.1
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• pp.32-51
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• 2007

Serial violent crimes have occurred more frequently. Additional attention is paid to relevant areas in which discussions has also increased. This study analyzed Young-cheol Yoo, serial killer case. Two of Yoo's crimes were studied for modus operandi. The cases selected were the premeditated break-in homicide of upper-class elderly people and the impulsive homicide of the Hwanghak-Dong street vendor. Crime motives, targets, times, places, means and methods were analyzed. Profiling techniques in Young-cheol Yoo cases were evaluated and the problems discovered during investigation were discussed. The followings are the findings of the analysis of the serial killer Yoo cases. Yoo exhibited a hatred toward the rich, the elderly, and women as well as a fear of diseases and death. Yoo's crime targets were the elderly residing in wealthy houses, street vendors and prostitutes. The numbers of victims were: 3 men and 5 women victims in 4 homicide cases involving the elderly residents in wealthy houses; one man in 1 street vendor homicide case 11 women in 11 prostitute homicide cases, so total 20 persons were murdered in 16 cases. The time of the crimes were between 10 am and noon in the homicide cases of the elderly and very late at night or early in the morning in the prostitute homicide cases. Means and methods facilitated include the use of a knife as a threat and a hammer made by Yoo to strike the head and face of victims. In the homicide cases involving the elderly, he attempted to disguise the crime scene as a burglary or committed arson to destroy the evidence; in the prostitute homicide cases, bodies were mutilated and buried in secret. 1) Generally each serial killer case has different characteristics, motives, and purposes; while some serial killer cases involve similar methods, others use different methods. Unlike other crimes, serial killers' characteristics and tastes are very different, so it is difficult to explain serial killings based on a specific model. It is important to accurately capture modus operandi of each serial killing and for detectives to familiarize themselves with them. The process of tracing and use of imagination which follows a serial killer's psychology and thought must be used to find out what kind of thoughts pushed the killer to commit the crime. In order to investigate and research difficult subjects such as serial killing, various methods, skills, and relevant knowledge should be studied, and institutional endeavors should go hand in hand with individual efforts.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.125-126
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• 2007

In this paper, the floating body with vertical plate is introduced with a study on the flow patterns and characteristics in around the floating body by using 2 frame particle tracking method. This paper introduce an analysis method to predict the characteristics if flow around the neighboring fields if Floating Body with vertical plate in order to investigate a high performance model. Flow visualization has conducted in a drcu1ating water channel by a high speed camera and etc. Flow phenomena according to turbulence intensity distribution and flow separation around the floating body with vertical plate were obtained by two-dimensional PIV system.

• Journal of Korea Water Resources Association
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• v.50 no.3
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• pp.201-210
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• 2017

This study proposes a numerical model which is able to simulate turbidity currents intruding into a reservoir and resulting sediment depositions. The proposed model is applied to laboratory experiments by Toniolo and Schultz (2005), and propagation of turbidity currents, morphological change, and trap of suspended sediment are simulated. It is simulated that the turbidity current after plunging at the foreset of the model delta, propagates along the bottom. The thickness of the turbidity current increases significantly after being blocked by the dam, and this effect is propagated in the upstream direction. In addition, it is simulated that the foreset moves in the downstream direction due to both the bedload and suspended load and the thickness of the bottom set increases due to the suspended load. It is found that the height of the intake affects the thickness of the turbidity current and the location of the internal hydraulic jump. The impact of the height of the intake on the trap efficiency is not clear in the experimental results, however, overall trap efficiency is predicted quite successfully by the model. Also, sensitivity analysis is carried out, and the results indicates that the particle size affects the trap efficiency most.