CHARACTERISTICS OF SOLUBLE ORGANIC SUBSTANCES ACCUMULATED IN THE ANAEROBIC-AEROBIC ACTIVATED SLUDGE PROCESS WITH CROSS-FLOW ULTRAFILTRATION

김태동 安東大學校 工業技術硏究所 1998 공업기술연구논문집 Vol.5 No.1

To elucidate the characteristics of soluble organic substances, which accumulate in the anaerobic-aerobic activated sludge process with cross-flow ultrafiltration, a continuous wastewater treatment using synthetic wastewater was conducted in a bench-scale experimental apparatus. A cross-flow type ultrafiltration membrane module was used for solid-liquid separation step. As the treatment proceeded, soluble organic substances which included non-biodegradable substances have contained substances which were released as a result of cellular disruption, and metabolites produced by microorganisms. These substances effects to decrease the oxygen uptake rate and nitrification rate of the activated sludge. At the sane time, the lag time, the maximum growth rate and ultimate biomass concentration in the growth curve of E. coli. were affected by theses substances.

운동 선수들의 스포츠 의료 선호도에 관한 연구

김태동 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

The purpose of this study was to investigate and analyze preference factors on sport clothes of athletes, and to present basic data on effective development of sport clothes and to improve competitive ability. The subject were 1636 athletes. The following conclusion was come to draw through processing of this study. 1. Preference of sport clothes according to sex According to sex, all of price, quality, design/color, fashion, wearing factors was not showed statistically significant difference between male athletes and female athletes. 2. Preference of sport clothes according to subjects According to subjects, price factors was showed statistically significant difference between collegiate athletes and business athletes. 3. Preference of sport clothes according to exercise career According to exercise career, all of price, quality, design/color, fashion, wearing factors was not showed statistically significant difference. 4. Preference of sport clothes according to national team career According to national team career, all of price, quality, design/color, fashion, wearing factors was showed statistically significant difference

세가지 형태의 유기-무기물 복합체의 합성 및 이차 비선형광학 특성

김태동,이광섭,민유홍,윤춘섭 한국고분자학회 1998 한국고분자학회 학술대회 연구논문 초록집 Vol.1998 No.10

인삼(Panax ginseng)의 squalene synthase 유전자 발현양상 및 프로모터 분석

김태동,한정연,허경혜,최용의 한국임학회 2009 한국임학회 학술발표논문집 Vol.2009 No.-

활성슬러지 구성 미생물에 의한 폴리오바이러스의 감소 효과

김태동,최동혁,Kim, Tae-Dong,Choi, Dong-Hyuk 한국환경보건학회 2006 한국환경보건학회지 Vol.32 No.4

The biological wastewater treatment system is known to have an important role in reducing the quantify of enteric virus in water environments. To clarify the roles of activated sludge microbes in decreasing the virus infectivity, the behavior of the virus in bacteria, protozoa, and metazoa was examined by pure or mixed culture system using poliovirus type 1(Lsc, 2ab strain). In the bacterial culture systems, the virus infectivity in the liquid phase decreased by a reversible adsorption of the virus to the bacteria or bacterial flocs. On the other hand, in the protozoa and the metazoa culture systems using T. pyriformis and P. erythrophthalma, respectively, with a variety of bacterial strains as prey, the main virus decrease mechanism of reversible adsorption in early stage was changed to irreversible predation, which was not eluted in this study. The virus decrease was more effective in the P. erythrophthalma culture system, which had high predation and floc forming abilities. However, in the mixed culture system of Z. ramigera and P. erythrophthalma, the more rapid reversible adsorption of virus to Z. ramigera flocs preceded the irreversible predation of P. erythrophthalma.

스포츠 소비자의 제품지식이 경기장 유인에 미치는 영향 : 육상경기를 중심으로 A focus on the athlete

김태동 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.5

This research is begun with providing basic material for marketing strategy for inspection activity to the athlete as many audience come to stadium to enlarge of athlete member which is basic event of all sport and to encourage morale of the athlete which is non-popularity and alienation event. The subject was consist of 437. I got the result as follows. According to sex about the knowledge of sports manufactures affect a stadium attraction, in case of record knowledge, between high group and low group, men were significant difference on competition power, facilities and marketing factor, women were significant difference on competition power, public relation(P.R.) marketing factor and contest schedule. In case of the knowledge on a athlete, between high group and low group, only woman was significant difference on competition power, public relation(P.R.) facilities, marketing factor and contest schedule. The team knowledge was significant difference facilities factor, contest schedule, marketing factor between high group and low group in woman group. 1) The rule knowledge was significant difference on competition power, public relation(P.R.), facilities, marketing factor and contest schedule between high group and low group in woman and man group. 2) According to objects, in record and rule knowledge, there were significant difference between middle school and high school group, between high school and university group and office group, between middle school and university group and office group. 3) According to income, there were no significant difference in any group. 4) According to region, there were no significant difference in any group in the influence which the knowledge of sports manufactures affect a stadium attraction.

재난환경내 건축재료 및 연기에 따른 드론 전파 감쇠에 대한 연구

김태동,염인수 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.12

재난환경에서 연기와 건축물재료에 따른 전파 감쇠에 관한 실험적 연구를 제시하였다. 화재와 같은 재난환경이 발생하면 드론 운용시 건축자재에 의한 통신장애나 화재 시 발생하는 연기로 인해 전파 감쇠가 발생한다. 이에 따라 본 논문에서는 벽체와 연기에 따른 드론의 전파 특성을 비교·분석하였다. 먼저 벽체 종류 및 두께에 따른 전파 감쇠를 분석하기 위해 완전 차폐 공간인 무향실(3m x 1m x 1m)에서 4가지 벽체에 해당하는 전파 특성을 실험하였다. 또한 연기밀도에 따른 전파 특성 시험을 위해 컨테이너 공간(5.8m x 2.8m x 2.2m)을 구성하였고 광 소멸법을 이용하여 공간내 동일한 연기밀도를 구성한 후 4종류의 연기에 대한 전파감쇠를 비교하였다. 본 연구에서는 실험에 사용될 픽스호크 기반의 모듈을 제작하고 비행관제용 433㎒, 제어용 2.4㎓, 그리고 영상수신용 5㎓ 대역에서 전파 감쇠에 관한 연구를 수행하였다. 벽체 종류 및 두께에 따라 수신감도가 크게 감소하여 감쇠의 주요 원인이 되었다. 연기에 의한 전파 감쇠는 크지 않지만, 우레탄, 플라스틱, 고무 등의 연료는 목재에 비해 상대적으로 감소하였으며, 2.4㎓와 영상수신용 5㎓대역에서는 감소폭이 상대적으로 크게 나타났다. This study examined microwave attenuation according to the smoke and wall type in a disaster environment. When a disaster such as a fire occurs, there is a distortion of drone communication within the building. An experimental study was performed to compare the microwave attenuation of drones according to the building materials and smoke. First, the microwave characteristics corresponding to the four types of walls in a specially designed anechoic chamber (3m x 1m x 1m) were examined to determine the microwave attenuation for building materials. The propagation attenuation was studied according to the four types of smoke with the same density in the container space (5.8m × 2.8m × 2.2m). In this study, a communication module based on Pixhawk was designed and was conducted on microwave attenuation in 433㎒ for mission mode, 2.4㎓ for remote controller control, and 5㎓ for image receiving. The microwaves were not transmitted and decreased significantly depending on building materials at the radio frequency, which is the leading cause of attenuation. Although microwave attenuation was not huge according to the fuels in smoke, fuel like urethane, plastic, and rubber have a relatively reduced compared to wood. In the 2.4㎓ and 5㎓ bands, the decrease in microwave energy was relatively large.

서대문형무소역사관에서 유적을 활용한 역사교육

김태동 한국박물관교육학회 2019 박물관교육연구 Vol.- No.21

계속기업 강조사항과 회계정보 적시성과의 관계 : 감사보고시차를 중심으로

김태동,배창현,임현지 한국회계정보학회 2017 한국회계정보학회 학술대회발표집 Vol.2017 No.2

[연구목적] 본 연구의 목적은 적정의견을 받은 기업을 대상으로 강조사항에 계속기업으로서 의 존속능력에 대한 불확실성 기재 여부와 회계정보 지연과의 관계를 살펴보는 것이다. [연구방법] 계속기업으로서의 존속능력에 중대한 불확실성이 존재한다는 것은 기업이 파산에 이를 가능성이 존재함을 의미한다. 이처럼 계속기업으로서의 존속능력을 판단하는 것은 감사인에게도 매우 어렵고 힘든 작업이므로 감사에 보다 많은 시간이 투입될 것이다. 이는 감사보고의 지연과 감사보고시차의 증가로 나타날 것이다. 한편, 감사인의 규모에 따라 동일한 회계원칙을 적용함에 있어 보수적인 정도가 다를 수 있는데 계속기업 강조사항의 기재여부에 따른 감사보고시차의 차이가 감사인의 규모에 따라 달라지는지 분석하였다. [연구결과] 계속기업 강조사항을 보고한 기업은 그렇지 않은 기업에 비해 감사보고시차는 길어지는 것으로 나타났으며 회계정보의 적시성은 낮게 나타났다. 이는 감사위험이 상대적으로 높은 상황에서 감사인이 더 많은 감사노력을 투입한 것으로 해석된다. 또한 대형회계법인에게 감사를 받은 기업은 계속기업 강조사항이 기재될 경우 감사보고의 지연이 나타났으나, 비대형회계법인의 경우 계속기업 강조사항의 기재여부가 감사보고시차에 유의한 영향을 미치지 않는다는 결과를 확인할 수 있었다. [연구의 시사점] 본 연구의 공헌점으로는 계속기업 강조사항에 대한 정보이용자의 주의를 환기시키고 있다는 점에 있다. 즉, 강조사항에 계속기업과 같은 의견이 포함되었다는 의미는 감사인이 해당 기업에 위험이 존재하고 있음을 정보이용자에게 보내는 신호(signal)이기 때문에 외부정보이용자들은 감사의견과 함께 강조사항에 주의를 기울여야 할 필요가 있다. 아울러 감사보고시차에 영향을 주는 요인에 추가적으로 계속기업 특기사항이 고려될 수 있다는 결과를 보임으로써 후속 연구에 활용될 수 있을 것이다.

‘찾아가는박물관’ 프로그램의 변화양상 고찰: 국립민속박물관 ‘찾아가는박물관’ 을 중심으로

김태동 국립민속박물관 어린이박물관과 2017 어린이와 박물관 연구 Vol.- No.12