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이경락,최재신,김한순,Lee, Gyeong-Rak,Choe, Jae-Sin,Kim, Han-Sun 한국조류학회(藻類) 2003 ALGAE Vol.18 No.4
The physico-chemical characteristics and seasonal variations of phytoplankton community were investigated in the Paksil and Jungyang marshes. Water and phytoplankton samples for analyses were collected monthly from April 2002 to March 2003. A total of 421 taxa of phytoplankton belonging to eight classes identified. The number of taxa was highest in Bacillariophyceae, followed by Chlorophyceae, Euglenophyceae, Cyanophyceae, Chrysophyceae, Dinophyceae, Xanthophyceae and Cryptophyceae. The standing crops ranged from 1.25 ${\times}$ $10^6$ to 5.85 ${\times}$ $10^6$ cells ${\cdot}l^{-1}$ in Paksil marsh and 0.25 to 9.63 ${\times}$ $10^6$ cells ${\cdot}l^{-1}$ in Jungyang marsh. The highest algal density at Paksil marsh was recorded in October during the high development of Chlorococcales while the lowest value occured in July. In the Jungyang marsh, the maximum algal density was recorded in October when Cryptomonas sp. and Mallomonas sp. accounted for 64% to total cell numbers and the lowest cell density was observed in January due to the decrease of Chlorophyceae. The dominant species were represented by Euglena proxima, Trachelomonas oblonga, Trachelomonas volvocina of Euglenophyceae, Dictyosphaerium pulchellum, Monoraphidium griffithii, Oocystis parva of Chlorophyceae, Dinobryon sertularia, Kephyrion rubri-claustri of Chrysophyceae, Achnanthes minutissima of Bacillariophyceae and Cryptomonas sp. of Cryptophyceae in the Paksil and Jungyang marshes. Phytoplankton diversity(H’) and dominance index varied rather irregularly throughout the sampling period but they were significantly correlated. The highest diversity(H’Paksil = 3.68, H’Jungyang = 3.63) coincided with the lowest values of dominance(DPaksil = 0.05, DJungyang = 0.05)
낙동강에서 유기오염 및 SS 농도 변화에 따른 DOC 농도 변화의 특성
이규열 ( Kyu Yeol Lee ),김주언 ( Ju Eon Kim ),이권철 ( Kwon Chul Lee ),이경락 ( Kyung Lak Lee ),이인정 ( In Jung Lee ),임태효 ( Tea Hyo Im ) 한국물환경학회 2013 한국물환경학회지 Vol.29 No.4
Temporal increase of SS induces concentrations in various forms of organic matter including BOD, COD, TOC. Consequently, it causes hard to identify sources of water pollution during or after precipitation. The objective of this study is to investigate variations of DOC concentration caused by increase of flow and changes of external factors in river by comparing to SS concentration. In results, monitoring sites (e.g., Banbyeonchen) consisting of hard riverbed showed high correlation between SS and organic matters, except BOD. On the contrary, other sites (e.g., Naesungcheon) where riverbed consists of sand were found in a wide range of annual fluctuation in SS level, whereas these sites showed a narrow range in annual DOC fluctuation. In Gumhogang and Namgang, a lower correlation between SS and other factors was found most likely because of high concentration in organic matter. However, lower annual fluctuation values of DOC were observed in comparison to those of COD and TOC. Similar results were also confirmed in main river sites, Sangju and Mulgeum. In conclusion, DOC concentration is better indicator for monitoring organic matter which cannot be provided by BOD, COD, TOC in the Nakdong river basin.
이경락(Kyeongrak Lee),이상준(Sangjoon Lee),김상진(Sangjin Kim) 한국인터넷전자상거래학회 2015 인터넷전자상거래연구 Vol.15 No.4
Online automobile insurance means to provide automobile insurance services in cyberspace by leveraging the Internet and information communication. In previous relevant papers it has not been explained subscription intention with the interaction among users by social relationships, which is the most important features of the online automobile insurance. In this paper, we proposed an empirical model for the intention of continuous use of online automobile insurance by applying the uses and gratification theory. This model was developed based on a literature review and interviews with non-subscribers of online automobile insurance. And two antecedents factors, the relationship connection(bridging) and the relationship existence(bonding) was introduced based on social network theory for the main reasons of non-subscribing. We verified that the connectivity, informativeness, bridging and bonding had significant influence on the satisfaction of subscribing an online automobile insurance by regression analysis with statistically analyzed survey data. And we also verified the user satisfaction had significant influence on the continued usage intention. We found that the bridging and bonding appeared to be greater impact on user intention rather than connectivity and informativeness. It can be seen that forming customers relationship based on SNS is differentiation strategy compared with traditional pricing strategy in online automobile insurance. Contribution points of this paper are that the bridging and bonding factors used in social network theory and social capital theory are developed for online automobile insurance and that the significant relationship between satisfaction of subscribing online automobile insurance and continued usage intention was verified.
이경락(Lee, Kyungrag),염성원(Yeom, Sungwon) 한국OOH광고학회 2018 OOH광고학연구 Vol.15 No.4
민주적 정부는 정책의 소비자이자 수용자인 공중의 관계성을 중시할 수밖에 없고, 이러한 환경에서 소셜미디어는 공중과의 관계성을 안정적이고 긍정적으로 유지할 수 있는 주요 방법으로 인식된다. 이에 따라 우리 중앙행정기관들 역시 다양한 소셜미디어 채널을 이용해 정책을 홍보하고, 공중과의 관계성을 강화하고 있다. 다만 소셜미디어에 대한 사회적 기대와 달리 정부 부처의 소셜미디어 채널 이용 방식은 차별화되어 있지 않다. 대부분의 정부 부처가 동일한 메시지를 단순하게 다양한 채널을 통해서 배포하는 것에 주력하고 있고, 또한 동영상 콘텐츠처럼 젊은 세대들로부터 호응도가 높은 콘텐츠에 대한 활용도도 낮기 때문이다. 이와 관련해서 소셜미디어 PR 채널의 몇 가지 개선 방향을 도출할 수 있는데, 그 방안은 다음과 같다. 첫째, 블로그 운영을 통한 정보 전달 형태에서 벗어나 소셜미디어로 소통 채널을 확대하고 흥미성 있는 콘텐츠를 제작하는 방안을 고려해야 한다. 둘째, 동영상 콘텐츠에 대한 활용 비중을 더욱 높여야 한다. 셋째, 부처의 핵심 분야별로 개별적인 채널을 운영해야 한다. 넷째, 사용하지 않는 PR 채널을 폐쇄하고 부처의 특성에 따라 핵심적인 채널에 집중해야 한다. 소셜미디어를 이용한 PR에서 가장 핵심적인 요소는 알리고 전달하는 공보의 성격이 아니라, 정책 소비자·수용자와 소통을 하는 것이기 때문이다. The democratic government places importance on the relationship of the public, which is the consumer and detainee of the policy. In this environment, social media is perceived as the main way to maintain a stable and positive relationship with the public. As a result, our central government agencies are also using various social media channels to promote their policies and strengthen their relationship with the public. However, most government departments focus on distributing the same message simply through various channels, and the utilization of video contents is also low. In this regard, we can draw some improvement directions of social media PR channels. First, it is necessary to consider ways of expanding communication channels and creating interesting contents, away from the form of information transmission through blog operation. Second, government ministries should increase their use of video contents. Third, it is necessary to operate individual channels for each core sector of government departments. Fourth, close unused PR channels and concentrate on core channels according to the characteristics of the department.