도시 소하천 유지용수 확보를 위한 오수의 재이용 가능성에 관한 연구

이상우,문병현,이택순,서규태 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

A feasibility study was conducted to estimate domestic wastewater recycling for drought urban stream restoration. Nam-cheon flowing in the city of Changwon was selected for the study. Estimated low water flow of Nam-cheon was 0.25CMS. However it was calculated that the in-stream flow of Nam-cheon should be 0.78CMS. Although 0.31CMS was deficient to meet the calculated target flow considering inflow of tributaries(0.22CMS), the 0.23CMS of sewage was set to intake from existing trunk sewer in the study area. For the sewage of the concentration higher than 200 mg/L both BOD and SS, a pre-treatment was necessary to meet the target water quality. Chemical precipitation could produce the wastewater quality 81.2 mg/L as BOD and 69.6 mg/L as SS. The experimental result gave the effluent water quality 7.5 mg/L as BOD and 6.7 mg/L as SS after two stage treatment by contact oxidation using gravel and charcoal media, which meet the river water quality standard 10 mg/L as BOD for recreational and ornamental use. It was found that preaeration of sewage was necessary to maintain DO 4 mg/L for the proper treatment in the treatment system. However more economic and environmentally friendly treatment process should be given in further study.

전해응집공정을 이용한 염색폐수의 처리

이용택,한승우,조영개,이현문,김태근,손인식,양병수 한국환경과학회 2000 한국환경과학회지 Vol.9 No.4

This research studied the characteristics and applicability of electrocoagulation using aluminium electrode for the color and COD removal in textile wastewater. Electrocoagulation reactor used two different electrode, Fe and Al, since in the general chemical wastewater treatment, aluminium and ferrous salts were used as coagulants. Aluminium electrode showed higher removal efficiency of color and COD than ferrous electrode did. The COD and color removal efficiency improved at the 0.192A/dm^2 current density. Thus, the electrocoagulation process with bipolar aluminium electrode showed better efficiency in the decolorization and COD removal rate of textile wastewater effluent than custom coagulants did.

노후공동주택의 거주성능평가요소에 관한 연구

이병태,현택수,정의용 대한건축학회 2004 대한건축학회논문집 Vol.20 No.2

This study aims to propose the comprehensive evaluation of Performance multi-family housing. Most of the existing studies for the reproduction have evaluated the deterioration by the safety of structure. Therefore those pass over the functional factors which is important for the evaluation of residential qualities. This study represents that the reproduction renovation should not be secured the safety of structure but established the quality of life. And questionnaire asking expert's opinion also supplemented. As a result, the item for examination and the weight for evaluation are suggested in functional deterioration. The results of this study are summarized as follows: 1. Existent redevelopment criteria are not appropriate to decide the environmental comfort, the vital function of housing and the residential management finance. 2. The future criteria have to evaluate the existing environmental comfort, be reconstructed to put first general deterioration. 3. Evaluation elements was extracted throughout the document research. evaluation elements analysis system was separated in residential area, suburb of dwellings, community, and housing complexity environmental assesment. 4. Each category of influence ratio was extracted to assess total deterioration throughout the expert question survey. 5. Each category analysed : ① 0~30%: function is good (unnecessary to improve) ② 31~40%: average (necessary of partial improvement) ③ 41~59%: bad (necessary of total improvement) ④ 60~100%: the worst (unable to improve throughout the repair)

노후공동주택의 성능개선을 위한 거주자 설문조사에 관한 연구

이병태,현택수 대한건축학회 2005 대한건축학회논문집 Vol.21 No.1

The purpose of this study is to analyze the criteria of existing system and grasp the way of current implementation for the reconstruction and reuse projects Confirm the new possibility of reforming developments through the comparative analysis between related matters and actual state of foreign cases Suggest the reconstruction plans by types and the reuse plans in three areas (unit dwelling, housing site environment, equipments and facilities) Finally, the suitable solutions are suggested to Improve residential environment for reconstruction projects or reuse plans in the future The results of this study can be summarized as follows The concrete plans for reconstruction projects by types were set up in the regulational aspect, functional aspect, and environmental aspect The regulational and social devices for reuse planning were formulated the strengthening of reconstruction criteria, the regulations defining of reuse planning, the publicity for better understandings of reuse, the development of high-quality human resources for reuse construction, the application of appeasement policies as a residential environment Improvement, and so on The adaptable solutions In the aspects of dwelling unit, building block, and site planning were provided the enlargement of unit space or area, the renovation of facade, the functional change for dwellings on the ground level, the open piping of circulation systems, the expansion of community facilities the build up of spatial hierarchy, and lastly, the housing development set reuse planning forth as a premise

용지 호수공원의 수질관리 방안에 관한 연구

이춘수,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was performed for water quality management of Yonggi Lake Park in Changwon City. The results are as follows; The water quality of the lake was deteriorated during summer season because of algal blooming. It was estimated that existing treatment capacity of the lake water was not sufficient to meet the target lake water quality. And so the lake water circulation period, 40 days should be shorten to below 30 days by increasing the treatment capacity. Fountain and air supply facilities for 02 supply and mixing caused rather resuspension of solid settled at the bottom of the lake. It was also evident that the extended detention of water in the lake resulted in water quality deterioration. Consequently it is important to supply high quality water from other sources. Especially lower temperature water had better effect on improvement of the water quality.

Internet Survey에 관한 연구

이성희,정병택 목원대학교 사회과학연구소 1999 社會科學硏究 Vol.- No.3

일반적으로 사회과학분야의 연구에서는 응답자의 태도 및 의견을 "질문지"라는 매체를 통해 연구가설이 과학적 타당성을 부여한다. 최근 인터넷 및 컴퓨터의 빠른 보급으로 인해 이윤을 목적으로 하는 단순 앙케이트에서 여러 연구분야에서 인터넷을 통한 여론조사를 검토중이며 확산될 전망이다. 따라서 본 연구에서는 인터넷을 통한 여론조사방법을 개괄하고, 이에 필요한 환경 및 집계방법을 제시하는데 있다. 또한, 통계패키지 SAS를 이용하여 분석한 사례를 제시한다.

社會體育振興을 위한 國民意識 再考方案

金柄斗,蔡鴻遠,安禹洪,李敏炯,申榮吉,金基學,鄭相澤,林銖遠 慶北大學校 體育科學硏究所 1987 체육과학연구지 Vol.3 No.-

The purpose of this paper is to investigate and analyze the nation's consciousness about the social physical education by regional groups(big cityes, middle cityes, farm village, fishing villge). And the researchers are to find a way to populize this movement. These subjects for this investigation were chosen at random among the citizens in four region. 4,450 sheets of questionnaire were given to the citizen. And 3,587(81%) sheets of them were received from male(2,582) and female(975) citizens. The results of this investigation are as follows: 1. The nation's consciousness has not been still modernized and the nation tend to depend on their doctors rather than on the new active leisure sports, which is a passive and conventional way, to keep their health. 2. Most people have spent their leisures on nonactive hobby such as reading, listening to music, and watching TV rather than sports. 3. Most residents pointed out lack of facilities, and needed professional directors and various programs they could participate. 4. The opening of citizen athletic field and the gymnasiums to citizens was needed to recruit the lack of facility, and the participation to commercial sport ws differed by economical status and leisure time, however, they usually participated such activities as table-tennis, swimning and tennis. 5. To activate social physical education, first of all, an expansion of the facilities such as athletic fields and gymnasium is needed under the active support of government. 6. The facilities for young men and the handicapped is insufficient, and to prevent juvenile delinquency and guide them into the right way, we should lead them out to participate sports activity. And the facility for the handicapped is needed too.

FET형 반도체 마이크로센서 개발(Ⅱ)

손병기,이흥락,박이순,조진호,이성필,최평,서화일,고성택,박재윤,서장수,김창수 경북대학교 센서기술연구소 1994 연차보고서 Vol.1994 No.-

현재 의료진단, 화학공정의 모니터링이나 환경공학적 감시 및 제어 등의 분야에서 사용되고 있는 기존의 센서는 고가이며 용적이 클 뿐만 아니라 분석시간이 길고 사용하기 까다로운 것 등 여러 가지 문제점이 있다. 또한 측정환경에 영향을 주지 않을 만큼 충분히 작으며 빠른 분석시간을 가진 센서를 필요로 하고 있다. 본 연구에서는 기존의 센서들의 난점을 극복할 수 있는 새로운 형태의 FET형 전해질(electrolyte : H^+, K^+, Ca^2+, Na^+)분석 시스템, 용존가스(O_2, CO_2)분석 시스템의 개발을 중점적으로 추진하며, FET형 압력센서, 습도센서, 방사형 온도센서 등의 개별 FET형 센서에 관한 연구도 병행하고자 한다. Recently various kinds of sensors have been developed, being applicated to their own purpose. There are lots of difficulties to apply them to measurements in which the real-time monitoring is required without disturbing the surrounding environment. FET type semiconductor sensors, fabricated by the semiconductor integration technologies, have many advantages for their miniaturization, standardization, mass-production and in vivo/in situ monitoring. They also hold a very proper configuration for multi-functional sensors or integrated smart sensors, and wide availability by forming various kinds of physical or chemical sensing materials onto their sensing gates.

정수처리 공정에서 철과 망간 잔류 농도에 관한 연구

최미리,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was to investigate the cause of the color and turbidity in a small-scale water treatment plant using lakes water as water supply source. Water qualities in aqueducts, in depth of the lakes and in each process were measured. And effects of prechlorination on each unit operation in the water treatment, especially on iron and manganese removal, were studied. The concentration of iron and manganese was 0.13, 0.08 mg/L in the surface water and 1.93 and 0.433 mg/L in 15 m depth of the lake. Higher iron concentration of the inlet was measured to 5.35 mg/L which was caused by the steel aqueduct corrosion. The optimun coagulation dosages of Poly Aluminum Chloride(PAC) and Liquid Aluminum Sulfate (LAS) were 17.5 mg/L and 35 mg/L. Pretreatmnet of raw water with CaCOl improved the removal efficiencies of iron and manganes. However, more efficient method for removing iron and manganes was required.

잡음환경에서의 음성인식

문현택,이병수 순천향대학교 부설 산업기술연구소 1997 순천향 산업기술연구소논문집 Vol.3 No.2

In this thesis, problems connected with present speech recognition systems are pointed out and methods for performance improvement are proposed. Especially, a recognition system for use in a car noise environment is proposed and estimated. A speech recognition system comprises feature extraction, distance measure and pattern classification methods. Recently, weighted cepstral distance measures using LPC-cepstral coefficients as feature vectors have given high recognition rates, with HMM and DTW are widely used for pattern classification. But speech recognition rates drop rapidly in a noisy environment. To improve recognition accuracy in noise, an endpoint detection method which takes noise into account, a modified DTW, an autocorrelation subtraction method and a distance measure robust to noise are used to give improved speaker dependent isolated word recognition performance.