Advanced Treatment of Food Waste Leachate Using the Aeration Reactor with High Efficiency Pure Oxygen

Sang-Houck Lee,Jae-Chun Ko 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.2

고농도 질산성 질소를 함유한 산세폐수의 생물학적 처리에 관한 연구

박상진 ( Sang Jin Park ),이상혁 ( Sang Houck Lee ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.3

The purpose of this study is the efficient biological treatment of highly concentrated nitrate nitrogen by calcium ion control present within the pickling wastewater. In laboratory scale’s experiments research was performed using a sequencing batch reactor and the evaluation of denitrification reaction in accordance with the injection condition of calcium ions, the surface properties of microorganisms, and the evaluation of sludge precipitability were performed. Results of the study showed that the denitrification reaction was delayed when injecting more than 600 mg/L of the calcium ion within the denitrification process. In addition, we observed the absorption form of calcium ions absorbed on the surface of microorganisms following an increase in the calcium ion dose. It was found that as the calcium ion dose increased the sludge precipitability also increased continuously and it is judged that a smooth denitrification induction is possible when treating the nitrate nitrogen by the calcium ion control of pickling waste water and the shortening of precipitation time enables a liquid operation to increase the reaction time.

적산온도 기반의 무선센서 네트워크를 이용한 동절기 현장적용 콘크리트의 압축강도 추정

김상민(Kim, Sang Min),신세준(Sin, Se Jun),현승용(Hyun, Seung Yong),경영혁(Kyoung, Young Houck),한민철(Han, Min Cheol),한천구(Han, Cheon Goo) 한국콘크리트학회 2020 한국콘크리트학회 학술대회 논문집 Vol.32 No.1

대중음악 흥행결정요인이 국내대중음악 흥행성과에 미치는 영향 : 기획사와 유통사의 조절효과를 중심으로

김양석,이상혁,Kim, Yang Sug,Lee, Sang Houck 한국벤처창업학회 2015 벤처창업연구 Vol.10 No.1

K-Pop이 사회, 문화 그리고 경제적인 분야에서 긍정적인 요소로 작용하고 있음에도 불구하고, 국내에서는 관련 연구가 아직 활발히 진행되고 있지 않다. 이에 본 연구에서는 대중음악의 흥행결정요인들이 국내대중음악의 흥행성과에 미치는 영향을 규명하고자 하였다. 기존의 선행연구를 바탕으로 대중음악 흥행결정요인을 파악한 후 가수의 역량, 미디어 영향, OST 영향, SNS 영향 그리고 발매 첫 주 순위를 독립변수로 정하였다. 더불어 2013년 7월 둘째 주부터 2014년 7월 첫째 주까지 가온차트 내 디지털차트 순위에 진입한 국내대중음악을 선별하여 100위 순위 내 유지한 기간을 곡 별로 조사한 후 이를 주 단위로 측정하고 흥행성과인 종속변수로 정하였다. 기획사와 유통사의 역량울 조절변수로 설정한 후 국내대중음악의 흥행결정요인과 흥행성과와의 영향관계에 있어서 조절작용을 하는가를 연구가설로 설정하였다. 연구 결과, 가수의 역량, 미디어의 영향과 SNS의 영향 그리고 발매 첫 주 순위 등이 국내대중음악의 흥행성과에 정(+)의 영향을 미치는 변수로 분석되었으나 OST의 영향은 가온차트 내 디지털차트의 순위유지기간에 유의미한 영향을 미치지 못하는 것으로 분석되었다. 기획사의 역량은 자체적으로는 국내대중음악의 흥행성과에 부(-)의 영향을 미치는 것으로 나타났지만, 조절변수로 작용을 할 경우, 대중음악 흥행결정요인과 국내대중음악 흥행성과에 크게 영향을 미치는 것으로 나타났다. 유통사의 역량은 조절변수로 작용을 할 경우, 대중음악 흥행 결정요인과 국내대중음악 흥행성과에 정(+) 영향을 미치는 것으로 나타났다. The purpose of this study is to find the factors of the box office record in Korean popular music. For this purpose, 1.239 musics were selected in the Gaon digital weekly album chart from second week July 2013 to first week July 2014. The result can be summarized as follows: First, entertainment of music company, distribution of music company, singer, OST(Original Sound Track), television show, SNS and high ranking in the first week of its release are the factors of the box office record in Korean popular music. Second, entertainment of a large number of music production company is more effective than the others, but there is no difference in the case of distribution music company. Third, musics of singers who have large number of music ranked Gaon digital chart and appearance of television show program are effective in the box office record in Korean popular music. Fourth, SNS are great factors to promote Korean popular music. Fifth, it is important to rank high position in the first week of its release.

생태계보전협력금 제도 활성화를 위한 부과금 개선 방안 연구

김경호 ( Gyung Ho Kim ),이상혁 ( Sang Houck Lee ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2011 한국환경복원기술학회지 Vol.14 No.6

Korea introduced the cooperation charge on conservation of ecosystem for minimizing damage of ecosystem due to development projects and their effects and for preparing resources for natural environment conservation projects. Advanced countries have made efforts by expanding investment in natural environment conservation and restoring projects to promote prevention of global warming and improvement of biological diversity, are establishing nationwide strategies and plans. To examine the reality of projects by returns of the cooperation charge on conservation of ecosystem, microsite projects in schools and public facilities take the largest share while their project budgets are only about 100~300 KRW, relatively small, which might be attributable to budget restrictions in accordance with the calculating method of levying cooperation charge on conservation of ecosystem and problems of project proceeding in the system of returning fund for projects in general. The conclusion which this study suggests on invigoration of cooperation charge on conservation of ecosystem and its operation are as followings. First, although the cooperation charge on conservation of ecosystem has been introduced in 2001, the amount of imposition per unit area remains unchanged. It is desirable to increase the amount into 1,400 KRW/㎡ as of August, 2011 as the price index has been continuously rising for the past 10 years and the upward adjustment of imposition per unit area should be notified by the decree of the Ministry of Environment every January. Second, the ceiling amount of the cooperation charge on conservation of ecosystem should be abolished. Now the ceiling amount is defined as 1 billion KRW but it was found that there was not any ceiling amount specified according to the comparative analysis of similar systems with the Korean environmental improvement fund. The ceiling should be abolished so that medium level businesses are carried out and ecosystem recovering projects in the true sense of the word can be made smoothly. Third, weight should be introduced in calculating amounts in accordance with ecologic and economic values. Harmony between development and environment can be achieved by applying differentiated weights of constant regional coefficient by use zone and ecologic and economic values. Continuous efforts of improving cooperation charge on conservation of ecosystem should be made more than anything else so that projects by returns of cooperation charge on conservation of ecosystem get effectiveness.

硏究論文 : 영산강,섬진강 수계 수변구역 매수토지의 관리 현황 및 개선 방안- 순천시 지역을 중심으로-

변성수 ( Seong Soo Byon ),이상혁 ( Sang Houck Lee ) 한국환경복원기술학회(구 한국환경복원녹화기술학회) 2012 한국환경복원기술학회지 Vol.15 No.6

This study observes the purchased lands in riparian areas of Suncheon City region and proposes a reasonable management method. For the study, the site surveying and analysis on the neglected purchased lands is executed, then, based on the site analysis result, the appropriate management method for each neglected purchased land is established. Each management method is approached from the ecological restoration perspective. According to site surveying and analysis of the neglected purchased lands, most of the sites were bare and agricultural lands. The reason for this is thought to be as when purchasing a land, the areas with higher nonpoint source pollution are bought preferentially. As for the dominant species coverage, 26% (364,000m2) of the total neglected purchased land area in Sucheon City was covered with the dominated species, and for the exotic species coverage, 17% (232,000m2) of the total neglected purchased land area in Sucheon City was covered with the exotic species. The survey site constituted of five different invasive species such as Japanese Hop (Humulus japonicus), Daisy Fleabane (Erigeron annuus), and Evening Primrose (Oenothera odorata). As for the natural succession on site, about 47% of the area showed poor natural succession process. The reason for this outcome is understood as having a lack of appropriate management for purchased lands. Based on the site surveying and analysis, especially the current management state of the and its location, the research site was categorized into preservation, restoration, and improvement sites. During the establishment of the ecological riparian belt, the comprehensive management for preservation, restoration, and improvement of the purchased lands should be executed.

라돈 저감제를 이용한 건축자재의 라돈 방출 저감 연구

박경북,이상혁,Park, Kyung-Buk,Lee, Sang-Houck 한국환경보건학회 2014 한국환경보건학회지 Vol.40 No.6

Objectives: A radon emission reducing agent was prepared using charcoal and zeolite, and the amount was measured after coating construction materials with the agent. The availability of the radon emission reducing agent was evaluated. Methods: Construction materials (red brick, cement brick, and gypsum board) coated with reducing agent were placed in a chamber to measure radon emissions. The construction materials were coated one through three times. The spread volume for brick and gypsum board was 50 mL and 75 mL per application, respectively. The amount of radon emitted was measured by RAD-7 after 48 hours. Results: The reduction ratio increased with the number of coatings, and the reduction ratios for red brick, cement brick, and gypsum board were 63.3, 73.6, and 58%, respectively, in the case of three coatings of RA-1. The reduction ratios for red brick, cement brick, and gypsum board were 42.8, 58.1, and 26.2%, respectively in the case of three coatings with RA-2. RA-1 was slightly better than RA-2 in radon emission reduction. Conclusions: Radon emissions from construction materials decreased according to the concentration of reducing agent coating, and it was more effective than existing methods.

Biosorption of Chromium (VI) from Electroplating Wastewater using Pine Cone Powder

Chun-Ji Jin,Jiang-Li Shen,Sang-Houck Lee,Bo Xiao,Ping Yang 한국도시환경학회 2010 한국도시환경학회지 Vol.10 No.2

추출온도, 추출시간, 음용온도에 따른 커피 향미 특성 변화

김영선(Kim, Yeong Seon),김성진(Kim, Sung Jin),이상혁(Lee, Sang Houck) 한국벤처창업학회 2010 한국벤처창업학회 학술대회 Vol.2010 No.11

우리나라 茶人들의 茶書畵에 대한 인식조사 연구

이병인(Pyong-In Yi),이영경(Young-Kyoung Yi),이상혁(Sang-Houck Lee) 한국차학회 2008 한국차학회지 Vol.14 No.3

Tea calligraphy and painting refers to the calligraphies and paintings that are displayed in Tea rooms. Past studies with regard to tea paintings have been conducted mostly for Chosun Dynasty, which results in little information on current trend for tea calligraphy and paintings in modern tea life. This research aims to investigate the current trend and characteristics for tea calligraphy and paintings using questionnaire survey. The survey was performed to 201 tea peoples who consider themselves as having tea lives. The important findings on the current characteristics of tea calligraphy and painting are as follows: 1) Elegance(31.3%), spirit(27.9%), harmony(24.9%) were evaluated as the important conditions for the tea calligraphy and painting, 2) Zen calligraphy and painting(39.3%) and four gentlemen painting(26.4%) were found as the most popular categories of tea calligraphy and painting. 3) The desirable contents of tea calligraphy and painting were chosen as tea- related(47.3%), and nature-related(26.9%). 4) Scroll(47.8%) and frame(25.4%) were the most used forms of tea calligraphy and painting. The found characteristics of the owned tea calligraphy and paintings are as follows: 1) Among the participants, 112 people(55.7%) had their own tea rooms. 2) Zen calligraphy and four gentlemen painting occupied respectively 36.6% and 24.1% of the owned tea calligraphy and paintings. 3) the content were zen-related(36.6%), tea-related(29.5%), and nature-related(27.7%). 4) The popular forms were scroll(48.2%) and frame(36.6%). In conclusion, it was suggested that more research should be performed in the future in order to create the new tea-culture that can match modern tea life.