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서해 태안반도 연안에서 오터트롤에 채집된 저서생물의 종조성 및 계절변동
정경숙 ( Gyeong Suk Jeong ),차병열 ( Byung Yeul Cha ),임양재 ( Yang Jae Im ),권대현 ( Dae Hyeon Kwon ),황학진 ( Hak Jin Hwang ),조현수 ( Hyun Su Jo ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.3
To investigate specie composition and seasonal variation of demersal organisms in the coastal waters off the Taean peninsula, otter trawl surveys were conducted from April 2010 to January 2011. A total of 75 species were collected including 44 species of Pisces, 19 species of Crustacea, 6 species of Cephalopoda, 4 species of Gastropoda, and I spe-cies each of Bivalvia and Echinoidea. The dominant species in each season were Palaemon gravieri in spring, Cha-rybdis bimaculata in summer, Loligo japonica in autumn, and Crangon hakodatei in winter. The number of species, individuals and biomass were highest in autumn and lowest in winter. The diversity index was highest in summer and lowest in winter. The dominance index was highest in winter and lowest in summer. The richness index was highest in autumn and lowest in winter. The evenness index was highest in summer and lowest in autumn. A cluster analysis showed that demersal organisms were divided into two groups; spring and winter organisms (Group 1) and summer and autumn organisms (Group 2). We detected a significant difference (P<0.05) between these groups, mainly owing to Platycephalus indicus, Repomucenus koreanus, and Paralichthys olivaceus within Pisces: Trachysalambria curvi-rostris, Metapenaeopsis dalei, P. gravieri and C. hakodatei within Crustacea: and L. japonica within Cephalopoda.
Phosphorus Removal in Pilot Plant Using Biofilm Filter Process from Farm Wastewater
Shin, Sung-Euy,Choi, Du-Bok,Lee, Choon-Boem,Cha, Wol-Suk The Korean Society for Biotechnology and Bioengine 2006 Biotechnology and Bioprocess Engineering Vol.11 No.4
Various environmental conditions affecting total phosphorus removal from farm wastewater in a biofilm filter process were investigated using loess balls and Chromobacterium LEE-38 at a pilot plant. When Chromobacterium LEE-38 was used, the removal efficiency of total phosphorous was approximately 10- or 5-fold higher than that of Acinetobacter CHA-2-14 or Acinetobacter CHA-4-5, respectively. When a loess ball of $11{\sim}14mm$ manufactured at a $960^{\circ}C$ calcining temperature was used, the removal efficiency of total phosphorous was 90.0%. When 70% of the volume fraction was used, the maximum efficiency of total phosphorus removal was 93.1%. Notably, when the initial pH was in the range of 6.0 to 8.0, the maximum removal efficiency of total phosphorus was obtained after 30 days. When the operating temperature was in the range of 30 to $55^{\circ}C$, the maximum removal efficiencies of total phosphorus, 95.6 to 94.6%, were obtained. On the other hand, at operating temperatures below $20^{\circ}C$ or above $40^{\circ}C$, the removal efficiency of total phosphorous decreased. Among the various processes, biofilm filter process A gave the highest removal efficiency of 96.4%. Pilot tests of total phosphorus removal using farm wastewater from the biofilm filter process A were carried out for 60 days under optimal conditions. When Acinetobacter sp. Lee-11 was used, the average removal efficiency in the p-adsorption area was only 32.5%, and the removal efficiencies of chemical oxygen demand (COD) and biological oxygen demand (BOD) were 56.7 and 62.5%, respectively. On the other hand, when Chromobacterium LEE-38 was used, the average removal efficiency was 95.1%, and the removal efficiencies of COD and BOD were 91.3 and 93.2%, respectively.
차석기 安岩敎育學會 1994 한국교육학연구 Vol.1 No.1
조선 서학사상은 外來文化를 수용하는 방식과 영향에 따라서 달리 해석할 수 있는 가능성을 가지고 있다. 특히 사상·문화 등의 상부구조의 세계에 있어서는 하부구조의 제약 이외에도 다른 사회에서 이식한 사상과 문화의 영향을 받게 된다. 조선의 서학사상과 문화는 바로 발전과정으로서의 근대교육에 대한 평가체제라고도 할 수 있다. 특히 16, 17세기 예수회 선교사의 한역서학서는 성리학적 지배체제를 극복하고 사회개혁 의지를 보였던 실학지들이 주로 연구하였다. 서학이 지니는 종교적 측면과 과학기술적 측면에 대한 연구가 확대되면서 서학에 대한 학문적 논의가 이론화되고 부정과 긍정이 상반되는 인식까지도 초래하였다.
차선영,이석기,김한수,박영성 大田大學校 環境問題硏究所 1999 환경문제연구소 논문집 Vol.4 No.-
H2S adsorption characteristics of the impregnated activated carbon adsorbent were investigated. KOH reagent was used for impregnating the activated carbon. For analyses of the impregnated activated carbon adsorbent, various methods such as TGA test and acid-base titration, as well as measurements of BET surface and pH were adopted. As operating variables, adsorption temperature (25~45℃) and H₂S concentration(4.96~18.23mg/ℓ) were applied. The experimental results showed that the H₂S adsorption equilibrium capacity of KOH impregnated activated carbon adsorbent increased with increasing temperature and H₂S concentration.
마라톤 참가자들의 행동분석 연구 : 2003년 중앙일보 국제 마라톤대회를 중심으로 A case study of JoonAng Seoul Marathon
차석빈 순천향대학교 사회과학연구소 2004 순천향 사회과학연구 Vol.10 No.1
Using empirical survey methods, this study analyzed the marathon-related behaviors of 10km runners. Research findings are as follows. First, people started marathon exercises mainly for their health improvements. Second, marathon boom in our society appeared to be less than 3-4 years. Third, information sources people sought for the marathon race were diverse including mass media, past marathon experience, neighbors' recommendations, and marathon clubs. Finally, regarding service quality related to races, people thought on-spot management races such as depositories, street closing, and distance marked as important.
차석빈,김종문,우경식 한국문화관광학회 2000 문화관광연구 Vol.2 No.1
The development of internet environment in the society caused the travel industry to proceed into the internet business competitively. However, a little research has been conducted on the netizens' behavior in the internet travel businesses. This study attempted to address the behavioral aspects related to the internet use for salaried men visiting internet travel agencies(ITA). Research findings are as follows: 1)Netizens seemed not to invest much time in searching travel-related sites. Major purposes of their visiting ITA were acquiring travel information, hotel/condominium reservation, package product reservation, etc. 2) They thought the provision of travel information, protection of private information, and internet connecting speed important in purchasing travel product through internet. 3) They revealed high intention to visit ITA, but low to purchase goods. However, netizens who had experience of purchasing goods show higher intention to visit or purchase than those who did not visit ITA even one time.
차석빈,윤은형 순천향대학교 사회과학연구소 2000 순천향 사회과학연구 Vol.6 No.2
This study conducted an empirical research to analyze the usage behavior and satisfaction level of the foreign customers staying at executive floors(EFLs) in 10 deluxe hotels. Research findings revealed that respondents sought information on the EFL mainly through their past experience and chain hotel network. Respondents themselves, friend/companion, secretary and co-operator in Korea were major influential sources in selecting EFLs. In importance and satisfaction comparison, statistical significance was shown in in-room service. Finally, employee personnel service was revealed as the most influential service category in terms of total satisfaction guaranteed for EFL customers, followed by lounge and in-room service, respectively.
차석빈,오지연 순천향대학교 사회과학연구소 2000 순천향 사회과학연구 Vol.6 No.1
As people need the lifelong education in the 21st century, our society launched cyber education as a new education paradigm two years ago. This study attempted to evaluate the operation system of five cyber demonstration universities in Korea. Research finding indicate that there leave room for improvement ion several aspects. This study suggests that cyber education in the future need to consolidate the 'humanware', 'hardware', 'software' and ' baseware' to function effectively as well as to solve the problems that have been appeared during the last two-year demonstration period.