다도해해상국립공원 대흑산도의 상록침엽수림 식생구조

조영준 ( Cho Yeong-jun ),김하송 ( Kim Ha-song ),명현호 ( Myeong Hyeon-ho ),박정원 ( Park Jung-won ),오장근 ( Oh Jang-geun ) 한국도서(섬)학회 2018 韓國島嶼硏究 Vol.30 No.1

This research was carried out from April 2014 to January 2018 in the evergreen coniferous forest around Daehuksan Island in Dadohaehaesang National Park. A total of 77 plots were set up in this study area and the plant communities were divided into the following 14 communities : Pinus thunbergii community, Pinus thunbergii -Eurya japonica community, Pinus thunbergii-Camellia japonica community, Pinus thunbergii-Castanopsis cuspidata var. sieboldii community, Pinus thunbergii -Machilus thunbergii community, Pinus thunbergii-Pinus densiflora community, Pinus thunbergii -Eurya emarginata community, Pinus densiflora-Castanopsis cuspidata var. sieboldii community, Pinus densiflora-Machilus thunbergii community, Pinus densiflora -Camellia japonica community, Pinus densiflora-Eurya japonica community, Pinus densiflora-Pinus thunbergii community, Pinus densiflora-Carponus turczaninowii community, and Pinus densiflora community. In the case of dominant species studied in Daehuksan Island, Pinus thunbergii forest was dominated by the dominant species Pinus thunbergii community, Pinus thunbergii -Eurya japonica community, Pinus thunbergii-Camellia japonica community, Pinus thunbergii-Castanopsis cuspidata var. sieboldii community, Pinus thunbergii -Machilus thunbergii community, Pinus thunbergii-Pinus densiflora community, Pinus thunbergii -Eurya emarginata community, and Pinus thunbergii-Mallotus japonicus community. The investigated Pinus thunbergii community is a community identified by Pinus thunbergii, and it formsa community on coastal hillsides and southwestern slopes mainly in the Daehuksan Island Jinri, Eupdong, Mari and Sorasi village. In the case of dominant species studied in Daehuksan Island, Pinus densiflora forest was dominated by the dominant species Pinus densiflora-Castanopsis cuspidata var. sieboldii community, Pinus densiflora-Machilus thunbergii community, Pinus densiflora -Camellia japonica community, Pinus densiflora-Eurya japonica community, Pinus densiflora-Pinus thunbergii community, Pinus densiflora-Carponus turczaninowii community, and Pinus densiflora community. The investigated Pinus densiflora-Castanopsis cuspidata var. sieboldii community is a community identified by Pinus densiflora and Castanopsis cuspidata var. sieboldii, and it is clustered around the villages of Daehuksan Island Jinri, Yeri, Simri and Chilrak mountain and the Northeast slope. In Daehuksan Island, Pinus densiflora community and Pinus thunbergii community are mixed with evergreen broad-leaved forest, and natural transition occurs according to the ecological competition of these communities. The most important dominant species in the tree layer are Castanopsis cuspidata var. sieboldii, Machilus thunbergii, Pinus densifloraandPinus thunbergii. The most important dominant species in the subtree layer are Castanopsis cuspidata var. sieboldii, Eurya japonica, Camellia japonica, Machilus thunbergii, and Mallotus japonicus. The actual vegetation map produced by the main evergreen coniferous forest communities represented the survey area. The main evergreen coniferous forest communities represented in the vegetation map were divided into Pinus densiflora -Carpinus turczaninowii community, Pinus densiflora-Castanopsis cuspidata var. sievoldii community, Pinus thunbergii-Camellia japonica community, Pinus thunbergii-Castanopsis cuspidata var. sievoldii community, Pinus densiflora-Camellia japonica community, Pinus thunbergii-Eurya japonica community, Pinus thunbergii-Machilus thunbergii community, Pinus densiflora community, Pinus thunbergii community, and Pinus densiflora-Machilus thunbergii community. The area of evergreen coniferous forest in Daehuksan Island is 43.52% of the total forest area.

다도해 해상국립공원 대흑산도의 상록활엽수림 식생구조

조영준 ( Cho Yeong-jun ),김하송 ( Kim Ha-song ),명현호 ( Myeong Hyeon-ho ),박정원 ( Park Jung-won ),오장근 ( Oh Jang-geun ) 한국도서(섬)학회 2017 韓國島嶼硏究 Vol.29 No.1

This research was carried out from April of 2014 to January of 2017 in the evergreen broad-leaved forests around Daehuksan Island in Dadohaehaesang National Park. A total of 38 plots were set up in this study area, and plant communities were divided into 8 communities of Castanopsis cuspidata var. sievoldii community, Castanopsis cuspidata var. sievoldii-Pinus densiflora community, Pinus densiflora-Castanopsis cuspidata var. sievoldii community, Castanopsis cuspidata var. sievoldii-Pinus thunbergii community, Pinus thunbergii-Castanopsis cuspidata var. sievoldii community, Machilus thunbergii community, Quercus acuta community and the Camellia joponica community. Overall, in order to extract vegetation units based on the vegetation ecological information of the evergreen broad-leaved forest in Korea Peninsula, a comparasion study was conducted. The distribution area, habitat characteristic and its main distribution of Castanopsis cuspidata var. sievoldii community, Machilus thunbergii community, Quercus acuta community and the Camellia joponica community were compared for this study. The investigated Castanopsis cuspidata var. sievoldii community is a community identified by the Castanopsis cuspidata var. sievoldii. It forms a community in the southwestern slope and valleys of the Daehuksan Island Yeri, Sari, Simri and Sorasi village. The investigated Machilus thunbergii community is a community identified by Machilus thunbergii. It forms a community in and around towns, mostly in Daehuksan Island Yeri, Sorasi and the Mari village. The investigated Quercus acuta community is a community identified by Quercus acuta, and it forms a community in the top of Mt. Munam and the upper part of Viri village. The investigated Camellia joponica community is a community identified by Camellia joponica, and it was distributed around Daehuksan Island Sari, Simri village, and lowlands and the hilly area. However, there were many areas where tree vegetation was disterbed due to human interference. The actual vegetation map produced by the main evergreen broad-leaved forest communities represented the survey area. The main evergreen broad-leaved forest communities represented in the vegetation map were divided into Castanopsis cuspidata var. sievoldii community, Castanopsis cuspidata var. sievoldii-Pinus densiflora community, Pinus densiflora- Castanopsis cuspidata var. sievoldii community, Castanopsis cuspidata var. sievoldii-Pinus thunbergii community, Pinus thunbergii-Castanopsis cuspidata var. sievoldii community, Machilus thunbergii community, Quercus acuta community and the Camellia joponica community. The area of evergreen broad-leaved forest in Daehuksan Island is 58.0% of the total forest area.

Mg(OH)₂를 이용한 습식탈황에서 폐슬러리 처리특성연구

김근범,이은덕,박영성,임봉수 大田大學校 環境問題硏究所 1998 환경문제연구소 논문집 Vol.3 No.-

Properties analyses and treatment characteristics of waste slurry discharged in the wetted flue gas desulfurization process using Mg(OH)₂as a absorbent were investigated. Aeration and coagulation test were carried out to evaluate variation of some factors such as COD, SS, T-N, etc. related to waste slurry treatment. The hydraulic retention time(HRT) and coagulant dosage rate were applied as operating variables in experiment. As experimental results, the reduction effects of COD, SS in aeration test were distinct, due to oxidation of SO₃ and floc, formation of suspended solids. It was also found that the reduction efficiencies of SS and T-P in coagulation test are higher than 90%.

總括生産計劃에서 適定 퍼지수 比較法의 選擇에 관한 硏究

李相玩,朴永和,南賢祐,尹延根 동아대학교 공과대학 부설 한국자원개발연구소 1992 硏究報告 Vol.16 No.1

When using any of the aggregate production planning techniques mentioned in previous studies, it is generally assumed that the inputs of information are deterministic and easy to generate. However, the problem is more complex if the criteria and informations are expressed imprecisions. Therefore, it requires suitable method to deal with imprecisions. For select proper comparison method of fuzzy numbers in aggregate production planning with imprecise informations or criteria, this study use Dubois & Prade fuzzy number comparison method and Li-Lee fuzzy number comparison method among comparison methods fuzzy numbers. And then, proper method between two methods is selected. Also it is presented illustration.

Blood levels of cadmium and lead in residents near abandoned metal mine areas in Korea

Park, Dong-UK,Kim, Dae-Seon,Yu, Seung-Do,Lee, Kyeong-Min,Ryu, Seung-Hun,Kim, Soo-Geun,Yang, Won-Ho,Park, Doo-Yong.,Hong, Yeong-Seoub,Park, Jung-Duck,Lee, Byung-Kook,Moon, Jai-Dong,Sakong, Joon,Ahn, Se Springer-Verlag 2014 Environmental monitoring and assessment Vol.186 No.8

A Study at Investigating the Climate Change in East Asia with Changing Sea Surface Temperature

Park, Geun-Yeong,Lim, Yong-Jae The Basic Science Institute Chosun University 2020 조선자연과학논문집 Vol.13 No.1

The unsustainable human activities like increased use of automobiles, heavy industrialization and the use of large volumes of fertilizers, chemicals and pesticides in the agricultural land cause climate change problems in one way or another. Under normal circumstances, the heat radiations from the sun will be reflected back. An excessive volume of GHGs in the atmosphere would prevent these radiations from reflecting back. East Asia is facing severe climate change issues in recent times. A lot of climate change problems such as hurricanes and floods have been reported from this region in the last couple of decades. The study aimed at investigating the climate change in East Asia with changing Sea Surface Temperature (SST). The study adopted a quantitative research method with a case study research design where a deliberate focus was made on the East Asia Region. Secondary data was gathered and analyzed to yield both descriptive and inferential statistics. The study concluded that the impact of East Asia Climate variability was significant mainly for some extreme events. Also, the study concluded that there was a significant link between the change of the East Asia climate variability and that of the sea surface temperature. Further, the study concluded that a linear relationship existed between the sea surface temperature and the climate of East Asia. Hence, a linear regression was a significant predictor of the East Asia Climate (EAC) based on changing sea surface temperature. The model revealed that 37.4% of the variations in the climate change index were explained by the changes in the sea surface temperature. The climate was expected to change with a value of 49.48 for a unit change in the sea surface temperature.

Microwave Processing for Recovery of C-14 From Spent Ion Exchange Resin

Ga-Yeong Kim,Ki-Rak Lee,Hwan-Seo Park,Geun-il Park,Hyeon-Oh Park,Gi-Hyeon Kwon 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

Ion exchange resins are commonly employed in the treatment of liquid radioactive waste generated in nuclear power plants (NPP). The ion exchange resin used in NPP is a mixed-bed ion exchange resin known as IRN-150, which is of nuclear grade. This resin is a mixture of cation exchange resin and anion exchange resin. The cation exchange resin removes cationic radionuclides such as Cs and Co, while anion exchange resin handles anions (e.g., H14CO3 -), effectively purifying the liquid waste. Spent ion exchange resins (spent resin) containing C-14 are classified as low and intermediate level radioactive waste, and their radioactivity needs to be reduced as it exceeds the disposal limit regulated by law. Therefore, the microwave technology for the removal of C-14 from spent resin has been investigated. Previous studies have successfully developed a method for the effective removal of C-14 during the resin treatment process. However, it was observed that, in this process, functional groups in the resin were also removed, resulting in the generation of off-gases containing trimethylamine. These off-gases can dissolve in water from process, increasing its pH, which can subsequently hinder the recovery of C-14. In this study, we investigated the high-purity recovery of C-14 by adjusting the moisture content within the reactor following microwave treatment. Mock spent resins, consisting of 100 g of resin with HCO3 - ion-exchanged and 0, 25, or 50 g of deionized water, were subjected to microwave treatment for 40 or 60 minutes. Subsequently, the C-14 desorption efficiency of the mock spent resins was evaluated using an acid stripping process with H3PO4 solution. The functional group status of the mock spent resins was analyzed using 15N NMR spectroscopy. The results showed that the mock spent resins exhibited efficient C-14 recovery without significant functional group degradation. The highest C-14 desorption efficiency was achieved when 25 g of deionized water was used during microwave treatment.

Is the size of the epidermal cyst the same as or different from the size measured by ultrasonography?

( Byeong Geun Park ),( Hyunwoo Park ),( Ju Young Jo ),( Jae Yeong Jeong ),( Il-hwan Kim ) 대한피부과학회 2022 대한피부과학회 학술발표대회집 Vol.74 No.1

관광동기가 브랜드자산 및 행동의도에 미치는 영향 : 한국의 DMZ(DeMilitarized Zone)를 중심으로

박근영(Park, Geun-Yeong),최현준(Chio, Hyun-Jun),김광용(Kim, Kwang-Yong) 한국호텔외식관광경영학회 2020 호텔경영학연구 Vol.29 No.1

자동차 차제 경량화를 위한 알루미늄 합금 저항 점용접부접합강도 경향성 연구

박영도(Yeong-Do Park),진은근(Eun Geun Jin),Siva Prasad Murugan,고세진(Se Jin Ko),이영호(Yeong Ho Lee) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6