TGA 방법을 이용한 플라스틱과 하수·분뇨슬러지의 열분해 반응속도 연구

윤효숙,최성필,김성탁,원양수,신부영 嶺南大學校 環境問題硏究所 1997 環境硏究 Vol.16 No.2

요약문 도시 고형폐기물의 열분해 특성에 대한 기초 자료를 제시하고자 열중량분석기를 이용하여 가열속도를 실험변수로 하여 하수 및 분뇨슬러지와 5대 범용 플라스틱인 LDPE, HDPE, PP, PS 와 PVC의 열분해 반응속도인자 및 분해특성을 파악하였다. 활성화에너지는 가열속도에 상관없이 일정한 값을 나타내었으며 분해속도가 최고일때의 온도는 가열속도가 증가함에 따라 증가하였다. LDPE, HDPE, PP와 PS는 1단계 분해반응으로 350∼520 ℃에서 대부분이 완전분해되었으며, PVC는 2단계 분해반응으로 250∼550 ℃에서 분해가 진행되었다. 슬러지는 여러 단계의 분해반응으로 특정한 분해구간이 없이 전구간에 걸쳐서 분해가 진행되었다. PVC를 제외한 플라스틱은 완전분해되었으며, PVC는 약 10%의 잔류량이 있었고, 슬러지의 잔류량은 D 하수, S 하수, T 분뇨 슬러지의 순으로 43, 70, 28.5%를 나타내었다.Abstract The thermal decomposition of sewage/night soil sludge and LDPE, HDPE, PP, PS and PVC was studied by using a conventional dynamic thermogravimetric analyzer (TGA) in a flowing nitrogen environment at several heating rates between 5 ℃ and 40 ℃/min. The dynamic thermogravimetric analysis curve was analyzed to obtain the information on the kinetic parameters such as activation energy, reaction order, and Arrhenius preexponential factor. The activation energy keeps constant regardless of heating rates, and the temperature of he fastest decomposition increases with the heating rate. LDPE, HDPE, PP and PS were completely decomposed in the temperature range of 350∼520 ℃ including as the first step decomposition and PVC was decomposed in the temperature range of 250∼550 ℃ including the second step decomposition. Sludge was decomposed without specific temperature range as several decomposition step. Except of PVC, all plastics were decomposed completely. PVC keeps the remains of about 10%, and sludge keeps the remains of 43% for D sewage sludge, 70% for S sewage sludge, 28.5% for T night soil sludge.

신경회로망에서 뉴런간의 연결도를 이용한 4색 배치 문제 해결 알고리즘

임재윤,이기태,김덕주,현해진,강부식 濟州大學校工科大學附屬産業技術硏究所 1993 尖端技術硏究所論文集 Vol.4 No.-

In this paper we have proposed a method for solving a four-coloring problem using adjusted information transmission between adjacent neurons in neural networks. These algorithms are based on McCclloch-Pitts binary neuron model neural networks. If a map shares n regions, a 4×n neural array is used to color a map of n regions where each neuron as a processing element performs it. By programming these algorithm by a C-language in IBM PC 486 DX and adapting it to various examples, we have showed the ability of our system. If one neuron is selected among four neurons, the strength of order three neurons is wakened. So, by transmitting the information of selected neuron, adjacent neurons cannot share the same color.

균형측 교합장애로 인한 하악운동 및 저작근 활성도의 변화에 관한 연구

이윤정,박남수,최부병 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.2

The purpose of this study was to investigate the influence of balancing interference on the mandibular movement and masticatory muscle activity. 5 subjects(male, average age of 24.3) without dysfuction in masticatory system were selected. The balancing interference was provided by construction of cast metal crown and onlay on the upper and lower first molars. Clinical examination, changes of mandibular displacement and velocity, and muscle activity were recorded and analyzed by means of BioPak system(Bioresearch Inc., Milwaukee Wisconsin, USA). The results were as follows ; 1. In clinical examination, various symptoms were reported by all subjects after application of interference. Almost symptoms were subsided after elimination of interference. 2. In the border movements in frontal plane, lateral border movement toward non-interference side was changed according to the interference after application of interference. Immediately after removal of interference, border movements' pattern was recovered as same as before experiment. 3. Duringguru chewing on the non-interference side, horizontal movement was decreased immediately after application of interference(p<0.05). 1 week after application of interference, horizontal movement was more decreased in 3 subjects and showed a chopping type masticatory stroke. But in 2subjects, horizontal movement was increased to avoid interference. 4. In EMG of the mandibular rest position, no significant changes were showed in the experiment period(p>0.05). 5. During gum chewing on the interference side, the activity of opposite temporal muscle was increased immediately after application of interference(p<0.05). 1 week after application of interference, The activity of ipsilateral temporal muscle and left and right masseter muscles was increased (p<0.05). 1 week after elimination of interference increased muscle activity was recovered about the same level as before experiment. 6. During gum chewing on the non-interference side, 1 week after application of interference, the activity of ipsilateral temporal muscle was increased (p<0.05). 1 week after elimination of interference, increased muscle activity was returned about the same level as before experiment.

차량의 정속주행을 위한 지능형 제어기의 설계

한창훈,박윤명,임영도,최부귀 東亞大學校 附設 情報通信硏究所 1998 情報通信硏究所論文誌 Vol.6 No.1

This paper describes an intelligent cruise control system for automobile. With the remarkable numerical increase of automobiles on the road, the optmized traffic flow control using the cruise control is one of the very important traffic problems to overcome the limitation of an existing road capacity. Based on this idea that minimize the fuel cost and the air pollution, and accept a driver's need for driving, we have developed an intelligent cruise control system for vehicle. This proposed intelligent fuzzy cruise controller was successfully implemented using the fuzzy algorithm, the i80c196 μ-controller board and the throttle valve actuator. The field test results on an linear road was introduced.

다꾸지법을 이용한 구리와 타이타늄 마찰압접부의 용접변수의 영향에 관한 연구

金成演,延倫模,鄭承富,徐昌濟 대한금속재료학회 2002 대한금속·재료학회지 Vol.40 No.7

This paper describes a fundamental investigation of the friction welding condition for the pure copper/ pure titanium joining and the effect of friction time, upset pressure on the mechanical and metallurgical properties of the joint. Taguchi method has been adopted for investigating the contribution of welding variables. Under a constant upset pressure, the tensile strength have a little difference with an increase in friction time. At a constant friction time, the tensile strength increased with an increase in the upset pressure. The tensile fracture of Cu to Ti joint occurred at the Cu base material near the interface.

신경회로망에서 뉴런간의 연결도를 이용한 4백 배치 문제 해결 알고리즘

현해진,김덕주,강부식,이기태,임재윤 濟州大學校 工科大學 産業技術硏究所 1993 産業技術硏究報告 Vol.4 No.-

In this paper we have proposed a method for solving a four-coloring problem using adjusted information transmission between adjacent neurons in neural networks. These algorithms are based on McCclloch-Pitts binary neuron model neural networks. If a map shares n regions, a 4×n neural array is used to color a map of n regions where each neuron as a processing element performs it. By programming these algorithm by a C-language in IBM PC 486 DX and adapting it to various examples, we have showed the ability of our system. If one neuron is selected among four neurons, the strength of order three neurons is wakened. So, by transmitting the information of selected neuron, adjacent neurons cannot share the same color.

PI형 퍼지제어기를 이용한 강인한 자기동조 시스템 설계

김민정,이인용,조용성,박윤명,최부귀 동아대학교 정보기술연구소 2001 情報通信硏究所論文誌 Vol.8 No.2

Fuzzy logic controllers(FLC's) have been reported to be successfully used for a number of complex and nonlinear processes. PI-type FLC/s are most common. But kike conventional PI-controllers, performance of PI-type FLC's for higher order systems, systems with integrating elements or large dead time, and also for nonlinear systems may be very poor due to large overshoot and excessive oscillation. The proposed FLC's are also used for marginally stable and unstable systems where well-known Ziegler-Nichols tuned PI or PD controllers exhibit very poor performance. The simulation results showed that in each case the proposed scheme outout forms its conventional counterpart.

학교체육 활성화 방안에 대한 연구(Ⅰ) : 강원대학교 교양체육 운영방법의 개선을 중심으로

이광재,문병용,노성규,박기동,홍관이,한상준,유옥재,엄기진,정청자,오수일,김윤래,박장평,부기원 江原大學校附設 體育科學硏究所 1986 江原大學校附設體育科學硏究所論文集 Vol.- No.11

Try to find a scheme for activation to College Physical Education, this Report informs the various kinds of Survey and process those were projected for improvement of management methods on Cultural Physical Education in Kang Weon National University. From experimentally carried out "Sports events Choosing System" not as usual be inforced "Total practical Skill System", Following Positive effects and sujestions were Presented; 1. "Sports events choosing system" gave birth to more students' interesting and more voluntary participation to the sports events they chose, and sports skill and instruction level was elevated due to charge of expert according to each sports events. This system would be managed continuously hereafter for it related to life sports. 2. This System needs to closed cooperations between College and Community, for the facilities of community are utilized by college. 3. To complete the plan for activation of college Physical Education, additionally, the successional study ; namely "autonomous extracurricular sports activity" should be excuted hereafter.

학문중심교육과정 유형에 따른 미술교과 융합인재교육(STEAM) 프로그램 개발

이부연 ( Boo Yun Lee ),현은령 ( Eun Ryung Hyun ) 서울과학기술대학교 과학문화전시디자인연구소 2014 한국과학예술융합학회 Vol.18 No.-

The purpose of this study was to develop a STEAM(science, technology, engineering, arts and mathematics) program, which has lately drawn much attention as a way to foster the creative elite. It``s specifically meant to develop a workable artcentered STEAM program on the basis of three basic discipline-centered curriculums, which were spiral curriculum, interdisciplinary curriculum and multidisciplinary curriculum, in an effort to nurture the convergence elite in a systemized manner. During the development of this program, it``s found that art subject was more characterized than any other subject of arts by "visibility," which is the most powerful stimulant to the five senses of learners. As there are various colors and forms in the output of art, it was possible to produce the somewhat stiff and difficult educational contents of mathematics in a manner to be intriguing and appropriate at learner level, which served, in turn, to facilitate the attainment of the cognitive and affective learning objectives.

중년여성을 위한 심뇌혈관질환 예방 교육프로그램의 효과

부윤정(Yun Jeong, Boo),임연길(Yeon Gil, Lim) 한국간호연구학회 2020 한국간호연구학회지 Vol.4 No.2

Purpose : This study was conducted to examine effects of a Cardiocerebrovascular Disease (CVD) prevention education program on knowledge, attitude, self-efficacy among middle-aged women. Methods : A non-equivalent control group pretest-posttest design was used. Participants were 53 middle-aged women who registered in a community health center in S city. The experimental group (n=25) received the Cardiocerebrovascular Disease prevention education program 6 times over 6 weeks. Knowledge, attitude, self-efficacy on Cardiocerebrovascular Disease of the participants were examined with self-report questionnaires. Data were collected between June 25 and August 3, 2018, and were analyzed using x2-test, Fisher’s exact test, Independent t-test, with SPSS/WIN 22.0. Results : After the intervention, the experimental group showed a significantly higher score in the level of self-efficacy(p=.040) compared to the control group. However, statistically, no significant difference were noted for knowledge(p=.717), attitude(p=.764) of Cardiocerebrovascular Disease prevention. Conclusion : Results suggest that a Cardiocerebrovascular Disease prevention education program can be an effective strategy to improve self-efficacy on Cardiocerebrovascular Disease in middle-aged women.