플라즈마 화학증착법에 의한 Al[2]O[3]단층피막 과 Al[2]O[3]/(Ti[0.5]Al[0.5])N 이중피막의 제조 및 특성에 관한 연구

손경석 서울대학교 대학원 2000 국내석사

地方議會와 執行機關間의 葛藤解消方案硏究

손경석 순천대학교 경영행정대학원 2003 국내석사

The era of Local autonomy in Korea has extensively reopened by composing both a base city council and a megalopolis council in April and July of 1991, since it was stopped in 1961. Having had high expectations and disappointments, it has been created to have new system of local assembly. In spite of finding the reasons for the existence to serve local citizens, the local assembly and the executive agency frequently disappointed us, with failed trust and lack of support for their residents; for instance, there was discord between the city council and the executive agency, there was conflict between councilmen, and there was controversy surrounding a city council secretariat. The executive agency and the local assembly are the two axises which will lead the local government. The chief of the local government, who plays a role to implement his/her authorities given by law and to execute the matters for decision, represents the local government. The local assembly, a representative body for residents, carries out control functions; such as Ordinance establishment, Deliberation & Decision of city budget, and Audits for administrative affairs, against the chief of the local government. An essential functions of the local assembly is not only to observe but also to criticize the executive agency. Therefore, it is a positive phenomenon that inside the agency confrontation type both the local assembly and the executive agency always maintain the tension relationship they have established. On the other hand, a rather negative aspect would be the falling adhesion situation between both agencies. Accordingly, The local assembly has to faithfully comply with their original duties, which are deciding on proceedings, monitoring against the executive agency, and must contribute to develop local autonomy. The executive agency, as a representative agency for residents, consists of members to be elected by citizens. it needs to set up ideal relationships with the local assembly to avoid their conflict and enmity, by admitting various projects proposed by city council into city policies. After systematically analyzing the conflicts which became an obstacle in the development of the local autonomy between both agencies, I divided the conflicts into similar cases referring to newspapers and related documents. In addition to this, I studied cases in Gwangyang city and divided them into similar types; "What is the cause of conflict?" and "What is the scheme of solving conflict between both agencies?". Moreover, I also divided the cases into Behavioral Conflict, Systemic Conflict, Functional Conflict, and Environmental Conflict. Firstly, The Behavioral conflict focused on the actions and attitudes between both councilmen and executive government officials. Secondly, The Systemic conflict has been caused by differing views between the central and local governments. Thirdly, The Functional conflict is found within a range of systems which are the work between councilmen and executive agency members. Lastly, The Environmental conflict depends on whether or not the groups of the local government, consists of the central government, a political party and local resident group, participate in or concerned with administrative procedures. The conclusion of analyzing differing opinions between both the city council and the executive agency, is as follows; ten Functional conflicts, seven Behavioral conflicts, six Systemic conflicts, and four Environmental conflicts. These are recent cases of Gwangyang city, which are classified into three conflict types from a total of 27 cases. Hereby, in the decisions of general policy cases, conflicts between both agencies compositively appeared at the same time. In the introduction of the local autonomy system, we were faced with more Behavioral conflicts among controversial cases in the nation. According to the cases between both agencies in Gwangyang city with in the past 10 years, Functional conflict has increased. Even though several schemes of solving conflicts between both agencies were provided, It is not a perfect solution to all conflicts. Finally, there is a possibility for local autonomy, when Members of the Local government, the chief of local government, councilmen, and residents all together, make an effort to solve conflicts. This is key to making a bright future of Local autonomy. I am really looking forward to continue studying this area, and accelerating the development for Local autonomy.

제7차 개정 교육과정 개정안 중학교 수학교과서 및 익힘책 비교분석 : '정수와 유리수'단원

손경석 아주대학교 교육대학원 2010 국내석사

블랙-숄즈 모델을 이용한 수치적 옵션 가격결정

손경석 한양대학교 대학원 2011 국내석사

There are various techniques for the numerical solution of mathematical model of derivative securities. Mostly numerical methods to be used for option pricing are Lattice method, Monte-Carlo simulation and finite difference method. We apply finite element method for solving Black-Scholes model. We apply finite element method to the approximation of the American option value. American put has a free boundary on which the optimal exercise take place. Derivative securities with more complicated payoffs than European options tend to be increasing. For example, There are barrier option, Asian option etc. These are called Exotic options. Finite element methods is proposed in various Exotic options.

분말활성탄과 정밀여과막을 이용한 가축분뇨의 후처리 공정

손경석 충북대학교 2010 국내석사

This experiment was conducted to research into the optimum filtration velocity(Flux) and operation factors in order to control COD(Mn) which has been recognized with problem on the process of swine waste water so that was performed to use the process which Micro-filtration and PAC (Powdered Activated Carbon) to treat the wastewater discharged from the DAF(Dissolved Air Flotation) chemical treatment and MLSS of being operated by PACT (Powdered Activated Carbon Technology). The filtration was normally performed about 15days at the point of 13.9LMH in case of adding the NaOCl constantly when the filtration of MLSS to be operated by PACT in the process of using MF and PAC. From this result, Continuous filtration will be possible if the chemical cleaning would be carried out by periods to recover the membrane permeability. Besides, from the result of the filtration test on the waste water discharged from the DAF, fouling has been observed on the condition fo 10,000mg/L PAC and 19.2LMH and Continuous filtration without chemical polishment was able to be performed for 40days at the point of 13.9LMH in the condition of 20,000mg/L PAC addition. Also Trans membrane pressure(TMP) in condition fo 30,000mg/L, 13.9LMH was increased much quicker than the filtration duration of 20,000mg/L. To conduct the filtration process successfully it must be keep the permeability from the accumulation of organic compounds on the membrane surface by the PAC adsorption effectively. Reasonable PAC dosage amount must be estimated from a experiment because the luxury PAC addition could bring about the negative effect by it`s cake layer characteristics and it would be necessary to research more to acquire the influence factors by polymer on the fouling mechanism. In the adsorption test by Freundlich equation base to use the PAC, k, 1/n values was 0.61, 0.98 and in this case K value on the PAC was not high. In the adsorption of PAC, the COD(Mn), Color Unit(C.U) was decreased as much as to add the PAC dosage but its efficiency was getting declined. The decrease rate of COD(Mn), and C.U was similar that is to say the removal efficiency of COD(Mn), C.U was reaching about 68.7%, 89.0% in respective at 4,000mg/L PAC dosage and the removal efficiency of C.U was generally higher about 20% than that of COD(Mn) Finally optimum flux and reasonable dosage amount to operate the filtration process is 13LMH and 20,000mg/L PAC and Withdrawal to regulate the PAC concentration in reactor must be necessary continuously including of consideration on the polymer influences.

혼합과채주스의 청징 및 농축에 관한 연구

손경석 대구대학교 2002 국내석사

고품질 청징주스의 실험적 기초자료를 제시하기 위하여 원심분리, 효소 처리, 한외여과처리, 병행처리를 통한 청징 및 반응표면분석(response surface methodology, RSM)을 이용하여 최적 청징조건을 찾아 내었으며 탁도, 색도 및 일반성분을 분석하고 한외여과농축, 진공동결농축, 회전증발농축을 이용하여 농축 특성을 비교하였다. 혼합과채주스는 원심분리, 효소처리, 한외여과, 병행처리에서 탁도가 모두 99% 이상의 청징효과를 보였으며, 원심분리한 경우 단일 및 혼합시료의 모든 실험대상에서 10,000 rpm, 5℃일 때 뛰어난 청징효과를 보였다. 그러나 초기탁도에 대한 청징비율은 초기 5분 동안에서 현저히 높은 값을 나타냈다. 효소처리한 경우 단일시료인 사과, 오렌지, 당근이 각각 0.03%, 40℃, 60분, 0.03%, 40℃, 40분 그리고 0.05%, 20℃, 80분에서 우수한 청징효과를 보였고 당근의 함량이 높을 경우 청징에 많은 효소가 소비되었다. 한외여과의 청징이 다른 청징방법들에 비해 우수하게 나타났으며 투과플럭스를 감안하여 보았을 때 고온·고압조건에서 높게 측정되었다. 병행처리에 의한 청징 역시 우수하였으나 한외여과에 비해 청징이 개선되지 않았다. 청징방법에 따른 색도 변화에서 밝기를 나타내는 L^* (lingtness) 값과 적색도를 나타내는 a^* (redness) 값 및 ΔE 값은 한외여과방법이 높았으며, 황색도를 나타내는 b^* (yellowness) 값은 원심분리한 방법에서 가장 높게 나타났다. 일반성분에서 비타민 C는 초기시료에 비해 혼합시료에서 낮은 함량을 나타냈으며 한외여과에 의한 청징 시 함량이 가장 낮았다. pH는 모든 청징방법에서 비교적 변화가 적었고, 가용성 고형분은 대체로 낮아지는 경향을 보였으나 감소 폭은 크지 않았다. 총당 및 환원당은 한외여과와 병행처리 방법에서 감소 폭이 크게 일어났다. 회전증발농축에서 탁도가 높게 측정되었고, 한외여과 및 진공동결농축에서 L^* 값이 높았다. a^* 값 및 b^* 값은 회전증발농축에서 높은 값이 측정되었다. 회전증발농축 시 비타민 C의 함량이 가장 낮았고 가용성 고형분의 함량이 높게 측정됐다. 그러나 pH 및 비중은 농축방법에 크게 영향을 받지 않았다. We found the most suitable clarification conditions of high quality juice to supply the experimental basis data and analyzed turbidity, color changes and general compositions using the centrifugation, enzyme treatment, ultrafiltration, combined treatment (centrifugation·enzyme treatment and ultrafiltration) and the response surface methodology and compared the concentration characteristics in the ultrafiltration, vacuum freeze, rotary evaporator concentration methods. Mixed fruit and vegetable juice using the centrifugation, enzyme treatment, ultrafiltration, combined treatment was measured the clarification effect that is more than 99Yo in turbidity and when do centrifuge, showed superior clarification effect in 10,000 rpm, 5℃ in the single and mixed samples. But, the clarification rate about the initial turbidity was expressed high value remarkably for initial 5 minutes. In case of the enzyme treatment, an apple, orange, carrot that is single samples were showed superior clarification effect each in 0.03%, 40℃, 60 minutes, 0.03% 40℃, 40 minutes and 0.05%, 20℃, 80 minutes and in case of carrot consumed enzyme much to clarify. The clarification method using the ultrafiltration, when consider the transmission flux, was measured more excellent than other methods in high temperature-pressure. The clarification by combined treatment was also superior but the clarification was not improved as compare with the ultrafiltration method. L^* value that express brightness degree, a* value that express redness degree and ΔE value in the color changes by the clarification method was mesured high and b^* value that express yellow degree appeared high in the centrifugation. In general compositions, vitamin C content decreased in the mixed samples as compare with the initial samples and in the ultrafiltration method. pH decreased in all clarification methods and also soluble solids decreased on the whole but not great. Total sugar and reducing sugar decreased greatly in the ultrafiltration and combined treatment. Turbidity was measured high in the rotary evaporator concentration, and L^* value were high in the ultrafiltration and the vacuum freeze concentration. a^* and b^* value were high in the rotary evaporator concentration. In the rotary evaporator concentration, content of vitamic C was the lowest and content of soluble solids were measured high. But, pH and specific gravity were not influenced greatly in the concentration methods.