활성오니를 이용한 인 및 질소의 생물학적 제거

최승태,박미연,장동석 ( Seung Tae Choi,Mi Yeon Park,Dong Suck Chang ) 한국수산과학회 1994 한국수산과학회지 Vol.27 No.6

Simultaneous removal of phosphorus and nitrogen from wastewater was studied by the anaerobic-aerobic system of activated sludge. In the anaerobic stage, most of the influent glucose was removed and orthophosphate was released, when the nitrate and/or nitrite concentration in the wastewater was almost zero. The amount of the released phosphorus was found to be directly proportional to the amount of the removed glucose. When the ratio of phosphorus to glucose in the influent was less than 0.04, the phosphorus in the wastewater was almost completely removed during the aerobic state. Under the anaerobic condition, activated sludge released phosphate and excess removal of phosphate occurred during the aerobic condition. Namely, the stress received in anaerobic period stimulated the uptake of phosphorus in aerobic period. The amounts of phosphorus release in the anaerobic and uptake in the aerobic stage were less in proportional to the concentration of NO_x-N. Further, if the initial ratio of NO₂-N/glucose was less than 0.37, the inorganic nitrogen in the influent could be completely removed.

종교의식으로서의 성만찬에 대한 가치탐구

최승태(Choi, Seung Tae) 한국종교학회 2008 宗敎硏究 Vol.52 No.-

교회표지에 대한 몰트만의 재해석이 한국교회에 주는 의미

최승태 ( Seung Tae Choi ) 한국조직신학회 2011 한국조직신학논총 Vol.31 No.-

Moltmann`s reinterpretation of the marks of the church gives an important message to the Korean Church which has been criticized as a community separated from society. For his reinterpretation suggests a way that the Korean Church can get out of the criticism. In short, Moltmann`s understanding of the church`s marks emphasizes that the church should not be separated from the world, but has to perform its mission in the world. This indicates a spirituality of participation, not escape. In the history of the church, there was a tradition giving up everything secular. The monasticism in the middle ages was an example. But this was an attitude to imitate Christ who gave up all things and became poor voluntarily. Thus it was not a simple escape from the world. However, the Korean Church possesses what it should give up, such as riches and power, but it has lost what it should keep, such as freedom, poverty, partisanship, and suffering that Christ possessed. If the Church had preserved these values, it would not have faced with this kind of crisis. Now the Korean Church must again find those values that it has lost just as what Moltmann suggests. The Korean Church should endeavor to perform the unity in freedom, the sanctification in poverty, the universality in partisanship, and apostolicity in suffering. In this way, the Korean Church can become a beloved Christian community by the Korean people just as it was.

압입 시험방법을 이용한 고분자 막의 기계적 물성 측정에 대한 논평

최승태(Seung Tae Choi) 한국자동차공학회 2011 한국자동차공학회 지부 학술대회 논문집 Vol.2011 No.4

The mechanical behavior of polymers is usually described in terms of their viscoelastic and viscoplastic characteristics, depending on the time (or frequency) as well as the temperature, which complicate the mechanical response of polymer systems. The time-dependent characteristics of polymers are often referred to as creep or relaxation, depending on the controlling parameters in quasi-static experiments. On the other hand, upon the assumption of thermo-rheologically simple materials, the temperature tends to shift the mechanical response of the system in a logarithmic time scale, which is distinct around the glass transition temperature of polymers. In this study, instrumented indentations on elastic or viscoelastic polymer films are reviewed, and the underlying theories to extract the elastic and viscoelastic properties of polymer films are also reviewed. The contact analysis of polymers is complicated by their viscous behavior when they are in adhesive contact with other bodies. Even for a spherical elastic solid pushed into a plane surface of a viscoelastic body with constant force, the contact area continuously changes with time due to the creep characteristics of the viscoelastic body. Thus, the analysis of instrumented indentations to measure viscoelastic and viscoplastic properties can be quite complicated, depending on the shape of the indenter tips. The theory of adhesive contact between viscoelastic polymers is also reviewed.

BLU backlight용 EEFL불량검사를 위한 네트워크기반 멀티비전 통합시스템 구현

최승태(Seung-Tae Choi),허윤(Choi Yoon),최태호(Tae-Ho Choi) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.11

본 논문에서는 LCD backlight용으로 사용되고 있는 EEFL(External Electrode Fluorescent Lamp)의 불량 검사를 위한 네트워크기반 멀티 비전시스템에 대해 기술하였다. 개발된 검사시스템은 고속의 생산라인에 대응하기 위해 복수개의 EEFL을 동시에 검사할 수 있도록 여러 대의 비전시스템이 결합된 멀티비전시스템으로 구성되었다. 이러한 멀티비전 시스템에서는 각 시스템의 제어와 시스템간의 실시간 정보교환을 위해 효과적인 인터페이스가 필요하게 된다. 본 논문에서는 멀티비전 시스템을 위한 로컬 네트워크를 기반으로 하는 시스템 인터페이스를 구축 하였고, 이를 EEFL검사 장비에 적용하여 그 효용성을 검증하였다.

신소재를 활용한 공동주택 환기설비 항균 토탈패키지 시스템에 관한 연구

최승태(Seung Tae Choi),김준(Jun Kim),이영주(Young Ju Lee),이재욱(Jae Wook Lee) 대한설비공학회 2021 대한설비공학회 학술발표대회논문집 Vol.2021 No.6

The purpose of this study was to identify the total ventilation system which controls the indoor air quality in the most effective way, and which also inhibits the growth of bacteria. As a result of the application of this antibacterial system by UV C/A LED and M.O.F materials, the reduction rate of viruses and bacteria was 99.999%.

자외선을 이용한 활어용 수조수의 위생 대책 수립

최승태 ( Seung Tae Choi ),박미연 ( Mi Yeon Park ),장동석 ( Dong Suck Chang ) 한국수산학회 1995 한국수산과학회지 Vol.28 No.4

생선 횟집의 활어용 수조수에 대한 위생 대책 수립의 일환으로 자외선을 이용한 제균 효과를 검토하였다. 1. 물 두께 10mm(유수량; 730ml/sec, 등; 5조, 통과 시간; 2.4초)와 자외선 조사량 75W의 조건에서 자외선등 통과 직후의 해수에서의 생균수 감소율은 평균 85.0%였다. 2. 장염 비브리오균의 경우, 자외선 조사 후 1시간만에 3 log cycle 감소하였으며, 그 이후 큰 변화가 없었다. 3. 한편 쥐치에 같은 조건으로 72시간 처리했을 때 내장 세균의 감소는 거의 없었으나, 돌돔 및 쥐치의 표피와 아가미에서의 생균수 감소율은 약 2 log cycle이었다. 4. 패류의 여수율을 좋게 하기 위하여 수조수의 온도를 20~23℃로 조절한 수조에서 홍합과 굴을 같은 조건으로 처리했을 때 24시간 후에 생균수의 감소율은 홍합과 굴에서 각각 2 log cycle 정도였으며, 분변계 대장균의 경우는 각각 3 log cycle, 1.5 log cycle정도 감소하였다. The purpose of this study is to develop a sanitary aquarium for the safety slices of raw fish by using U.V. light. Water re-circulating system was composed of two tanks. One of the tanks (90×45×45cm in size) was used for rearing fish and the other (90×45×45cm in size) with 37 pieces of corrugated plastic plates was used for the growth of Nitrosomonas and Nitrobacter to remove ammonia from the water. Consequently, bactericidal effects of U.V. light were examined under the controlled condition of water with flow rate 730ml/sec (water flow thickness: 10mm), the width 41cm of water flow route, and the distance 4.75 cm from the lamp to its water bottom, and U.V. light 75W (5 lamps). The water of the aquarium tank will be theoretically circulated 1 cycle per 18 min. In these conditions the bactericidal effect was 85 % just after passing through U.V. light and 3 log cycle in aquarium tank water. The count of Vibrio parahaemolyticus just after irradiation was decreased by about over than 3 log cycle. Under the irradiation for 72 hours, viable cell counts in both skin and gill of fish reared were decreased into about 2 log cycle, but there was no significant decrease in viscera. When the temperature of the tank was controlled at about 20~23℃ under the same condition, viable cell counts were reduced about 2 log cycle, and fecal coliforms were reduced about 1 log cycle and 3 log cycle in Crassostrea gigas and Mytilus edulis, respectively.

아퀴나스를 통해서 이룩된 중세 가톨릭 성만찬 신학에 대한 루터의 비판

최승태 ( Seung Tae Choi ) 한국조직신학회 2012 한국조직신학논총 Vol.34 No.-

Martin Luther`s theology was basically established on the biblical viewpoint. By the biblical viewpoint he means a grammatical and literal understanding of the Bible, that is, seeing the Bible as it is. Luther had this kind of viewpoint because the Roman Catholic theologians in the Middle Ages put human thought on the superior position to the Bible by interpreting it from the perspective of philosophy, especially of Scholastic philosophy, Luther criticized the Catholic theory of the sacrament because it was based on human reason, namely philosophy rather than the Bible. According to Luther, when we saw the Bible as it was, Christ`s presence was realized not by transubstantiation but by means of coexistence of the substance of the body and blood of Christ in and with the bread and wine (consubstantiation). Like this, Luther asserted Christ`s real presence in the sacrament, and thus he also accepted the objective effect of the sacrament. Especially, Luther emphasized it opposing to Zwingli`s sacramental view. But while criticizing transubstantiation, Luther`s contribution was to rediscover the importance of faith in the celebration of the sacrament. Luther also criticized the Catholic Church`s understanding the eucharist as good work and sacrifice. From this understanding, the celebration of the eucharist made an effect even to those who did not attend, if someone offered it for them. Finally this understanding justified to sell the indulgence. Against this understanding, Luther asserted that the eucharist could not be good works and sacrifice, but rather it was Christ`s testament. By this assertion, Luther prevented the eucharist from becoming an instrument to content human desire. In this respect, Luther did not use his criticism of the Catholic theology of the eucharist merely for the Reformation. But rather he restored the essence of the eucharist as sacrament by discovering the original meaning of the eucharist as sacrament through the biblical understanding. At this point, we can say that Luther`s criticism of the Catholic theology of the eucharist pointed out the direction of how we should see and practice the eucharist.

편평한 다이아몬드 압입자와 탄성중합체 막 사이의 시간의존적인 접착력 측정

최승태(Seung Tae Choi),이승륜(Seung Ryoon Lee),엄윤용(Yoon Young Earmme) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.4

몰트만의 삼위일체론이 지닌 실천적 의의

최승태 ( Seung Tae Choi ) 한국조직신학회 2006 한국조직신학논총 Vol.17 No.-