Ferrite 觸媒에 의한 一酸化炭素의 轉位反應에 관한 硏究

姜京熙 단국대학교 1986 論文集 Vol.20 No.-

This research has been Performed on the purpose to reveal the reaction order and to examine how temperature, mole ratio, activity energy and space velocity on the conversion in using Feerrite cata1yst to convert. CO-gas into CO_2. These catalyst were prepared by copreciption and characterized by means of X-rays diffraction and BET studies. The result of experiment on carbon-monoxide-gas conversion reaction reaction are as follows; a) the conversional reaction of carbon monoxide is the first order reaction. b) Reaction temperature was revealed as range from 553K to 573K. c) the mole ratio of carbon monoxide vs oxygen was showed with in the range of 1.34. d) The activity energy of stronger than of any others was revealed at copper ferrite catalyst.

식물플라크톤의 세포외배출유기물을 고려한 소양호의 1차생산과 유기물 부하

남궁현,김범철,황길순,최광순,김철구 江原大學校 附設 環境硏究所 2001 環境硏究 Vol.18 No.-

The autochthonous and allochthonous organic carbon loading were measured in Lake Soyang, to estimate the amount of carbon loading into the lake and the contribution of their sources to the lake's carbon loading. Autochthonous carbon loading was estimated from phytoplankton primary production with the extracellular organic carbon(EOC). Allochthonous loding was determined by measuring dissolved organic carbon(DOC) and particulate organic carbon(POC) concentration in the main inflowing Soyang River. Both autochthonous and allochthonous organic carbon loading were high during the summer, from July to September, and accounted for 43.2% and 71.7% of the annual loading, respectively. Primary productivity was elevated up to 1,000 mgCm^(-2)d^(-1)during summer and lowest in winter. EOC production from phytoplankton was also large in summer, resulting in a high DOC concentration in the lake water. Primary production of phytoplankton and allochthonous organic matter loading from the watershed contributed to 53.6% and 46.4% of total loading, respectively. The EOC production accounted for 4.4~21.2% of POC primary production, implying that EOC production of phytolankton must be considered in estimation of primary production.

XML을 이용한 요양기관 청구 전자문서거래(EDI) 시스템의 설계 및 구현

김경태,최은하,김진호,최황규 강원대학교 정보통신연구소 2002 정보통신논문지 Vol.6 No.-

Many companies are using EDI(Electronic Data Interchange) for the electronic transmission of documents and information to and from other companies. The appearance of Internet can enhance existing EDI systems. Existing EDI systems have several problems such as poor system interoperability and high expense of VAN. This paper proposes a new EDI system utilizing Internet to provide open communication environment by using XML(eXtensible Markup Language) and this applies it to the EDI service for Hospital Demand. XML is a mark-up language extending HTML which is a standard language for expression of WWW(World-wide web) pages. XML is more structural than HTML, thus it is more suitable for the repetitive tasks of EDI and for the maintenance of databases. XML can transmit EDI documents in the open communication environment of Internet and users can easily access the documents with web browsers. Therefore we can provide EDI services within more open environment and we can build an EDI system with lower expense.

Nickel 觸媒에 의한 일산화탄소의 轉化反應에 관한 硏究

姜京熙 단국대학교 1988 論文集 Vol.22 No.-

The Conversion of Carbon monoxide to Carbon dioxde on Nickel Catalyst was investigated by Continuous reaction technique Nickel Catalyst were Prepared by the sream distillation pure Nickel hydroxide under Vacuum(Ca, 10^-2 Torr) at 290℃ for three hours and Characterized by means of X-ray diffraction and BET studies. The Nickel Catalyst is investigated by residual gas analysis for differential partial pressure of carbon monoxide and oxygen and temperature from 220℃ to 290℃. The Kinetic analysis of conversion data indicates the occurrence of first order, also molratio of p_O2/P_CO is 1.3. The activation energy of Nickel catalyst was 12.5Kcal/mole, also, equation of reaction Velocity is rate V=Ae^(-2.29×104/Rt) P^0.99_CO P^9.50_Po2

遲滯時間이 貯留函數 모델에 미치는 影響

남궁달 충북대학교 농업과학기술연구소 1995 農業科學硏究 Vol.12 No.2

The experiment was conducted to elucidate the differences of isozyme pattern and activity to esterase in susceptible and chlorpyrifos-(Rc), dichlorvos-(Rd) and permethrin-(Rp) resistant strains of female house flies(Musca domestica L.) using the methods of agar gel electrophoresis and filter paper test. And the results were summarized as follows. 1. Esterase isozyme showed eleven bands in the susceptible and three resistant strains by agar gel electrophoresis. 1) Esterase isozyme bands were Estα1β1, Estα2β2, Estα3β3, -Estα1β1 in the head, Estα1β1, Estα2β2, Estβ6, -Estα1β1, -Estα4β4 in the thorax and Estα1β1, Estα2β2, -Estα1β1, -Estα5β5 in the abdomen of the susceptible and resistant strains. 2) Estα5β5 was detected in all part(head, thorax, abdomen) of resistant strains, and Estα4β4 was not detected in the head and thorax of resistant strains. 3) -Estα2β2 showed more high activity in the thorax of Rc strain than the other strains. 4) Only -Estα3β3 was detected in all part of Rd strain. 5) -Estα2β2 was not detected in all part, and Estα3β3, Estα4β4, Estβ6 were not detected in the abdomen of Rp strain, however, those were detected in susceptible strain. 2. Esterase-α and -β activities appeared in the head, thorax and abdomen of susceptible and resistant strains by filter paper test. 1) Esterase-α showed more high activity than esterase-β. 2) Esterase-α activities were 1.15, 1.18 and 1.03 times in the head, 0.87, 1.18 and 0.89 times in the thorax and 0.82, 1.51 and 1.30 times in the abdomen of Rc, Rd and Rp strains to the susceptible strain, respectively. 3) Esterase-β activities were lower 0.66, 0.77, 0.70 times in the head, 0.84, 0.90, 0.90 times in the thorax of Rc, Rd and Rp strains than susceptible strain, but higher 1.19, 1.28, 1.25 times in the abdomen, respectively.

水性가스化 反應에 關한 硏究

姜京熙,李根培,辛源太 단국대학교 대학원 1982 學術論叢 Vol.6 No.-

The influence of reactant gas composition on the rate of the water gas shift reaction over an iron oxide chromirum oxide catalyst was studied. This method of analyzing experimental tests showed that the rate of initial reaction of the water gas shift reac tion had increased with increasing P_(H_2O), but that had decreased with increasing P_(CO_2). It was found that the mass tranfer affect the rate of the water gas shift reaction except catalyst system. And this experimental results showed that the rate of reaction had increased with increasing P_(CO_2) and P_(H_2O). At this experimental condition, the rate of initial reaction was established γ_0=kP_(CO_2) P_(H_2O)/1+K_(H_2O) P_(H_2O) and the reaction rate constant, K, 225(m㏖/g-cat. hr) and K_(H_2O) is 3.5(atm)^-1.

총의치의 교합면 형태에 따른 저작 효율 및 기능에 관한 연구

권긍록,박남수,최대균 慶熙大學校 齒科大學 1995 慶熙齒大論文集 Vol.17 No.1

This investigation was designed to determine the effectiveness of the posterior occlusal schemes on masticatory activity during mastication in complete denture. Twelve edentulous subjects were selected for this study. All subjects had no past history and no functional abnormality on masticatory system and TMjoint And, they had residual ridge of favorable morphology, firm mucosa and Class I skeletal jaw relationship, Twelve experimental denture with interchangeable occlusions(0-degree teeth, 30-degree teeth, Levin teeth and S-A teeth) were constructed for this study. The masticatory performance was analyzed by means of standard sieve(10, 16, 20, 30sieve), and the electrical activity from selected muscles(Temporalis and Masseter muscle) was recorded simultaneously with electromyography (Bio-Pak system) as the subject masticated test foods (rice, peanut and gum) with four different occlusal schemes. Mandibular movement was, also, measured with Sirognathography(Bio-Pak system). These recordings were performed in immediately , after 1 week and after 2 weeks of insertion of complete denture. The results were as follows; 1. The average masticatory performance of 0-degree artificial teeth was higher than any other artificial teeth. 2. Masticatory performance in denture wearer was affected preferentially by food and artificial occlusal schemes 3. During chewing, there was a statistical difference of EMG activity between masseter and temporal muscle(p<0.01). Especially, EMG activity of working masticatory muscle was highly affected by food rather than by artificial occlusal schemes. 4. In denture wearer, the velocity of opening was not affected by food, whereas, the velocity of closing was faster in soft food chewing than in hard food chewing, and the amount of vertical displacement was grater in chewing of soft and large bolus than in chewing of hard and small bolus. However, the amount of lateral displacement showed conversely(p<0.05). 5. It was considered that masticatory performance in denture wearer is not affected by the condition of residual ridge, the history of denture wear, the preference,the adaptation to artificial teeth and the total mesiodistal length of artificial posterior teeth.

성공적 정부개혁을 위한 동인(動因)으로서의 조직문화

朴慶孝 한국외국어대학교 사회과학연구소 1999 社會科學論集 Vol.17 No.-

선형 시스템의 모델 축약에 관한 연구

金慶哲,崔炯範 홍익대학교 산업기술연구소 1998 産業技術 Vol.8 No.-

The modelling of complex dynamic system is one of the most important subjects in engineering. A model is often too complicated to be used in real problems so approximation procedures are often used to achieve simpler models than the original one. The concepts of impulse energy approximation is introduced. The reduced model in obtained from the most significant pairs of alpha and beta parameters. There exists errors because from the most significant pairs of alpha and beta parameters. There exists errors because of the truncation. To overcome this problem an improved impulse energy technique is presented in the paper by appropriately selection alpha and beta parameters. There exists error because of the truncation. To overcome this problem an improved impulse energy technique is presented in paper by appropriately selecting alpha and beta parameters to retain more impulse response of the original system. This algorithm is programed using MATLAB language. A reduced-order model for the excitation system of power plants as an example study is considered This technique seems to be easy to perform and shows a good simulation results.

성직자 생활비에 대한 교회법적 고찰

남궁민 가톨릭대학교 사목연구소 1998 司牧硏究 Vol.6 No.-