α(t)-modification 을 이용한 수렴특성 개선에 관한 연구

李鍾烈,權誠河 國立 昌原大學校 産業技術硏究所 1987 産技硏論文集 Vol.1 No.-

Direct model reference adaptive control procedures were developed to control linear plants which satisfy a positivity condition. Using a combination of proportional and integral adaptive gains, these procedures achieved asymptotically perfect model output tracking with a large class of time-variable input commands. However, if perfect output tracking is not possible due to output measuring disturbances, the adaptive control system may diverge. Such divergence is to be eliminated, if the pure integration in the adaptive gains is replaced with a first order pole. But such a scheme cannot guarantee the convergence property, if disturbances are not present. In this paper, we use the reduced model to design the adaptive controller, and propose a modified adaptive law to guarantee the convergence property whether the disturbances are present or not.

지하철 배열이용 가능량에 관한 연구

김종열,김보철,김경철,최광환,금종수 동의공업대학 1998 論文集 Vol.24 No.1

Research on unused energy continues due to the limits of fossil fuel and the destruction of the environment. Therefore this study was performed as follows. The collectable amount of exhausted heat for an air-conditioning was calculated by the subway thermal environment prediction program. And the electric power needed by conventional heat source equipment was compared with one by unused heat source equipment when the exhausted heat was used by heat pump in heating and hot water supply. The results are summarized as follows 1. Forced ventilation should be conducted to keep optimal temperature in the subway tunnel in summer as well as in winter. According to the simulation, the temperature in tunnel was higher than that on the ground in summer when the forced ventilation was conducted only in the winter. 2. Ventilating time should be calculated out to the optimal condition for not only the saving power of the ventilation fan but reusing exhausted heat. By the simulation, it is certain that the exhausted heat should be eliminated in air-conditioning time. 3. The use of the exhausted heat source heat pump could save 8% of electric power per hour in comparison with existing heat pump. This was based on a present heat generation and traffic for ventilating time of general air-conditioning, but could be different by ventilating time. 4. As the traffic increases up to 1.5 or 2 times, electric power consumption of the conventional heat pump increases to 11% or 13.5% per mean hour in comparison with that of the exhausted heat source heat pump, though all-day ventilation.

事實上 理事에 관한 小考

박종렬 조선대학교 통일문제연구소 2002 統一 問題 硏究 Vol.15 No.-

雙補丸이 卵巢摘出로 骨多孔症을 誘發한 흰쥐에 미치는 영향

朴鍾元,崔相淳,金哲源,朴炳烈 한국전통의학연구소 2000 한국전통의학지 Vol.10 No.1

Aging is characterized by an age-dependent reduction in bone density. Pronounced bone loss by postmenopausal estrogen deficiency induces a bad effect on dynamic balance of bone metabolism. The purpose of this study is to examine what are the effects of the Ssangbohwan(SBH) on the ovariectomized rat model of postmenopausal osteoporosis. The results were summarized as follows : 1. Body weight in control group showed significant increase in comparison with sham, but that in SBH-treated showed no change in comparison with control. 2. The level of serum albumin in control group showed significant decrease in comparison with sham. That in SBH-treated was slightly decreased in comparison with control, which showed no efficacy. 3. The level of serum ALP activity in control group showed significant increase in comparison with sham, but that in SBH-treated was slightly decreased in comparison with control, which showed no efficacy. 4. The level of serum phosphorous in control group showed significant increase in comparison with sham, but that in SBH-treated showed no change in comparison with control. 5. The level of serum calcium in control group showed no change in comparison with sham, but that in SBH-treated was significantly decreased in comparison with control. 6. The level of serum T3 in control group showed no change in comparison with sham, but that SBH-treated showed significant decrease in comparison with control. 7. The level of serum T4 in control group showed significant increase in comparison with sham, and that in SBH-treated showed significant decrease in comparison with control. 8. Trabecular tibia strength in control group showed significant decrease in comparison with sham, but that in SBH-treated was slightly imcreased in comparison with control, which showed no efficacy. According to the above these results, SBH has shown to be capable of preventing and curing osteoporosis caused by old-aged and postmenopause

牧民心書「戶典六條」에서 보는 社會淨化의 哀情과 農村復興의 基調

朴宗烈,洪鍾雲 춘천교육대학교 새마을연구소 1981 새마을 교육연구 Vol.2 No.-

韓醫學에 있어서 姙娠의 成立에 關한 文獻的 考察

金鍾桓,金哲源,朴炳烈 圓光大學校 韓醫學硏究所 1993 원광한의학 Vol.3 No.1

This study was carried out in order to secure th foundamental material on the conceptive completetion which is able to apply to sterility, contraceptive methodog and family planning practically in a view of Oriental Medicine. As I researched the contents written in 30 kinds of classical literatures from Whangjaenaikyung(黃帝內經) to the Chung(淸) dynasty. The results of the study are as follows. 1. The conception is supervised by the Kidney(腎) which is the visera have a reproductive function in male and female and the place where the conception is forfomed directly is the Uterus(女子胞). 2. 20 years of age off and on is a mature period of Yin(陰) and YANG(陽) and from that is the suitable periods for the conception. 3. The conditions, regulation of menstral disturbances(調經) and beginning of sexual fuction(天癸) for female, invigoration of sperms(壯精; to promote the Kidney function for increasing vilility and sexual potency of the male) by tonifying the Kidney(補腎) for male, Tao of aggregation for semen(聚精之道), that of obtainment for species(種子之道) and so, are neccesary for the conception. 4. The fetus is formed by reciprocal cohension of Chung(精) and Hyeol(血), with a according that Chung(精) and Hyeol(血) is respectively explained to a sperm and a ovum. 5. Because of having cyclic changes of ovary which is extremely susceptible to fertilization namely ovulation period. If sexual intercourse, female can make the fetus surely. Thus that period is called inonzyhu(絪蘊之候), geokhu(的候) and kagi(佳期) in Oriental Medicine. It is thought that the obtained results will be help to treatments of clinical diseases on the associated with the conception and family planning. So further study on this is desired continuosly.

세인트루이스 모델의 政策有效性 論爭에 관한 小考

朴壬求,崔宗烈 全北大學校 1989 論文集 Vol.31 No.-

Since the 1930s there has been a running debate about the relative efficacy of monetary and fiscal policy. Especially, the controversy accelerated in many empirical studies since the St. Louis model was developed by L.C. Andersen, J.L. Jordan, and K.M. Carlson. They conducted firstly the empirical test on the subject by using the St. Louis equation[Andersen-Jordan(1968), Andersen-Carlson(1970)]. Their conclusion is that monetary policy has a significant and lastinf effect on nominal GNP but fiscal policy has no lasting effect. A number of critiques appear after the publication of the A-J and the A-C papers. The criticisms are focused on various technical and applied econometric aspects of their works such as the specification error, simultaneous equation bias, inappropriate indicators of policy actions, and inappropriate restrictions. The purpose of this parper is to survey the literature of the empirical results and the criticisms that emerges following the publication of the St. Louis equation, and finally to evaluate the St. Louis model that has been used mostly as a forecasting tool.

태양열 이용 냉난방 공조시스템 중 재생기의 하계 재생 능력에 관한 연구

김보철,최광환,금종수,김경철,김종렬 동의공업대학 1998 論文集 Vol.24 No.1

The humidity control is conducted not only for industrial applications but also for domestic ones. High humidity is a factor causing discomfort, thus the importance of using a LiCl(Lithium Chloride) solution has been recognized in recent years in connection with the high quality of goods to be manufactured. as well as cleanliness in a special environment against air pollution and environmental protection. This paper will examine the solar energy regenerator as a part of an open cycle solar energy absorption system for dehumidifying and drying purposes using LiCl solution. An outdoor experiment was done to find out how much could be regenerated in summer. It was found that regeneration rate was about 10kg/day at best in August, and about 5kg/day in September.

Calcium phosphate 결정 성장 최적화를 위한 Ti 표면의 BaTiO_3 박막 형성에 관한 연구

조진우,양홍서,박영준,황규석,송종은,이용렬 전남대학교 치과대학 2001 구강과학 Vol.13 No.2

This study was purposed to establish an optimized manufacturing process for a negatively charged ferroelectric thin flim on titanium substrate in order to develop a new implant system having the mechanical strength and bone forming ability. Ferroelectric materials show an alignment of positive and negative charges by poling treatment. Based on this property, this study was performed with the assumption that the Ca^2+ ions would be easily attracted on negatively charged surface and the attracted cation might behave as nuclei for bone-like crystal grownth in biological solutions. In order to have an osteoinducibility by the ferroelectric thin film coating, continuous and flawless crystalline thin film should be formed with ferroelectricity, and finally should be adequately poling treated. In this study, BaTiO_3 (BTO) was selected as a ferroelectric material. Before thin film coating process, most favorable poling condition was investiged with the evaluation of the difference in calcium phosphate (Ca-P) formation in simulated body fluid (SBF). Moreover, the parameters to form an optimum thin film were studied. Dense bulk BTO disks were fabricate using cold isostatic pressing(CIP) and sintered in air at 1300℃ for 2 hours. Sintered BTO disk was polished, and he crystallinity, microstructure, and ferroelectric characteristics were evaluated using an X-ray diffraction analysis (XRD), a field emission scanning electron microscope (FE-SEM), and an Impedance analyzer. To find the optimum poling condition for the calcium phosphate crystal formation, sintered bulk BTO specimens were treated with either of following poling conditions; 1) room temperature poling treatment [ polarizing field (Ep) = 25kV/cm, at 25℃ for 2 hours], 2) under Tc medium-temperaturepoling treatment (Ep=20kV/cm, from 85˚C to 25˚C for 2 hour), and 3) above Tc high-temperature poling were immesed in simulated body fluid (SBF) for 30 days, and the formation of calcium phosphate (Ca-P) layer n the surface was evaluated. The crystallinity, microstructure, and ferroelectric characteristic of BTO thin film were evaluated withthe variation of final heat treatment. It was performed after establishing the starting substance-solvent mixing ratio, coating times, and pre-heating temperature optimal to form continuous and flawless BTO thin film adequate for having ferroelectricity. Perparation of BTO thin film was made by dipping-pyrolysis technique using metal naphthenates as starting substances. BTO thin films was spin-coated on Ti substrate by dipping-pyrolysis technique using sol obtained by mixing Ba-naphthenate and Ti-naphthenate as starting substances. Pre-firing temperature of BTO thin film was performed at 450℃ because organic-solvent ws completely volatilized without any crystal growth, and the final heat treatment was performed at 600, 700 or 800℃, respectively. The results are as follows; 1. BTO disk sintered at 1300℃ for 2 hours showed average grain size of about 1㎛ and the relative dielectric constant at 1㎑ was abut 3000∼3500. 2. After immersing the sintered bulk BTO poled at respective conditions in SBF for 30 days, Ca-P layers were present on the negatively charged surfaces. In contrary, positively charged Bto surface did not show any noticeable charge of the surface microstructure after SBF immersion. 3. In he case of poling condition 1 and 2 treated with below Tc, Ca/P ratio showed a relatively low value of 1,.2∼1.5. While, in the case of poling condition 3 treated with above Tc, Ca/P ratio was 1.5∼1.67, which is similar to that of biological apatite. This phenomenon demonstrates that poling the BTO above the temperature of Tc is preferable for the Ca-P formation. 4. For thin film BTO coastin, the starting substance was prepared by an equimolar mixing of the Ba and Ti-naphthenate. Dilution of the starting substance with toluene was most appropriate at sol : toluene ratio of 5.2:4.8 Too thin sol produced porosity in film, and too thick sol resulted cracks in the film. By repeating the coating and pre-firing procedure 15 times, homogeneous film of 0.5㎛ thickness could be fabricated, and perfomed well during the poling treatment without breakdown. 5. The heat-treatmen of the BTO thin film at 700℃ produced a homogeneous crystalline structure without heterogeneous TiO2 formation. The BTO thin film heat-treated at 600℃ showed non-crystallinity and no ferroelectricity. Treatment at 800℃ produced heterogeneous TiO2 phase in the film, which is unfavorabe for having ferroelectricity by the distortion of the perovskite structure. The relative dielectic constant at 1 ㎑ was 152 and 112 by heat-treatment at 700 and 800℃, respectively. In summary, these results demonstrated that poling the ferroelectric B_aT_iO_3 surface negatively is effective for the formation of Ca-P layer in simulated body fluids. Poling condition at a temperature cooling from above Tc down to room temperature is most effective. By optimizing the method of BTO thin film coating on metal substrate for the formation of Ca-P layer, the data of this study might be applied for the manufacture of new bioactive implant system.

Review of the Theory of Natural Obligations

Jong Ryeol Park 한국디지털정책학회 2014 디지털융복합연구 Vol.12 No.5