포스트콜로니얼리즘 미학의 양가성

이석호 한국외국어대학교 1996 국내박사

3차원 공간 질의를 위한 위상학적인 네트워크 데이터 자동생성 및 효율성 분석

이석호 서울시립대학교 일반대학원 2011 국내석사

In recent years, a large and complex three-dimensional space has increased by developing construction and IT skills and people are living there for many hours. Accordingly, in this complex three-dimensional space, services for preparation for emergencies or to provide convenience information are needed. In order to provide these services efficient understanding of topological relationships of the complex space should be supported by default. A method of understanding the topological relationships and its efficiency can vary according to each topological data model. B-rep based data model is the most widely used for storage and representation of topological relationships, and from early 2000s, a lot of research of a network based topological data model has been conducted. Network based topological data model was proposed to improve the inefficiency aspect of B-rep based data model for determine the spatial relationship. In this study, 1) automatic generation algorithms of topological(adjacency, connectivity) network data based on network based topological data model is developed using geometric data, and 2) the efficiency of topological network data for spatial queries is verified. This verification is performed through comparative analysis of efficiency for spatial queries between network based topological data model and B-rep based data model. Criteria of comparative analysis are data storage, response time of query. As a result, experimental basic theory of efficient topological data model is established between these two data model. 최근 들어 건축과 IT기술이 발전함에 따라서 대규모의 복잡한 3차원 공간이 증가하고 있고, 사람들 또한 이러한 공간에서 생활하는 시간이 늘어나고 있는 추세이다. 이에 따라 복잡한 3차원 공간 내에서 유사시를 대비한 또는 편의 정보를 제공하기 위한 서비스가 필요하게 되었고, 이러한 서비스를 제공하기 위해서는 복잡한 공간에서의 효율적인 위상학적 관계성 파악이 기본적으로 뒷받침이 되어야 한다. 관계성 파악은 위상학적 관계를 저장하고 표현하는 각각의 데이터 모델에 따라 그 방법과 효율성이 달라진다. 위상학적 관계성 저장과 표현에 있어서 가장 널리 사용되어 왔던 데이터 모델은 B-rep 기반의 데이터 모델이고, 2000년대 초반에 네트워크 기반 위상학적 데이터 모델에 관한 연구가 많이 진행되었다. 네트워크 기반 위상학적 데이터 모델은 공간의 위상학적 관계파악에 있어서 B-rep 기반 데이터 모델의 비효율적인 면을 개선하고자 제시된 데이터 모델이다. 본 연구에서는 1) 네트워크 기반 위상학적 데이터 모델에 따른 위상학적(인접성, 연결성) 네트워크 데이터를 기하학적 데이터를 이용하여 자동 생성하는 알고리즘을 개발하고, 2) 공간질의에 대하여 위상학적 네트워크 데이터의 효율성을 검증한다. 위상학적 네트워크 데이터의 효율성은 기존에 많이 사용되어 온 B-rep 기반 데이터 모델과 데이터의 저장용량, 인접성 및 연결성 질의 응답속도를 기준으로 하여 수행하였다. 이에 따라 두 데이터 모델간의 효율성 비교검증의 실험적 기초이론을 다진다.

情報技術 발달이 組織構造에 미치는 影響 : 新聞 製作部暑를 중심으로

이석호 한남대학교 1996 국내석사

탄소섬유 강화 에폭시 복합소재로부터 탄소섬유 회수

이석호 부경대학교 2010 국내석사

Recently, the amount of thermosetting plastic wastes has increased with the production of reinforced plastic composites and causes serious environmental problems. The epoxy resins, one of the versatile thermosetting plastics with excellent properties, cannot be melted down and remolded as what is done in the thermoplastic industry. In this research, a series of experiments that decompose epoxy resin and recover carbon fibers from carbon fiber reinforced epoxy composites was performed. We experimentally examined decomposition process using nitric acid aqueous solution and compared their decomposition efficiencies and mechanical property of recovered carbon fibers at different operating parameters. For the prevention of tangle of recovered carbon fibers, each composites specimen was fixed with a teflon supporter and no mechanical mixing was applied. The recycling system is composed of hexahedral circulating flow reactor made of quartz, Teflon supporter, acid resistance pump and auxiliaries. Epoxy matrix in the composite was effectively decomposed by nitric acid aqueous solution in the circulating flow reactor and carbon fiber could be recycled without any tangle or disturbance. Optimum conditions for the recycling process have been experimentally established. Decomposition products were analyzed by scanning electron microscope, gas chromatography mass spectrometer , and universal testing machine. Carbon fibers could be completely recovered from decomposition process using nitric acid aqueous solution. The tensile strength losses of the recovered carbon fibers were less than 4%.

(A) Study on Chemical Mechanical Planarization Characteristics of Polycrystalline Chalcogenide Material

이석호 한양대학교 대학원 2013 국내박사

Phase-change Random Access Memory (PCRAM) is increasingly becoming one of the most candidates for nonvolatile memories in the future memory market. In the fabrication process for the confined cell structure below 30nm design rule, chemical mechanical polishing (CMP) should be adopted after the deposition of Ge2Sb2Te5 GST on the bottom electrode contact followed by patterning the confined cell. The effect of slurry pH and hydrogen peroxide (H2O2) on polycrystalline Ge2Sb2Te5 (pc-GST) CMP performance was investigated. The polishing rate of pc-GST film increased when the slurry pH decreased or increased from neutral pH. In addition, pc-GST polishing rate was highly affected by adding H2O2, resulting in a high pc-GST polishing rate at pH 2-11. However, a noticeable difference in surface roughness of pc-GST film polished was observed between acidic (pH 2) and alkaline (pH 11) regions. Low RMS of roughness as well as a high polishing rate of pc-GST film was obtained in the acidic pH region with 1wt% H2O2. In contrast, in the alkaline region a high RMS of roughness of pc-GST film was observed owing to enhanced selective corrosion between Ge, Sb, and Te elements. And the role of H2O2 in alkaline slurry on the polishing rate of pc-GST film was investigated. The polishing rate of pc-GST films increases sharply with the H2O2 concentration up to 0.2 wt % and then increases slightly with a further increase in H2O2 concentration up to 3.0 wt%. However, the polishing rate of SiO2 films very slightly increases with H2O2 concentration up to 3 wt%. Polishing selectivity of pc-GST films to SiO2 films of over 100:1 can therefore be achieved by adding H2O2 to the slurry. And the chemical mechanical planarization (CMP) mechanism of pc-GST using nitric acid slurry without or with 1.0 wt% H2O2 was investigated. Without H2O2, the pc-GST film surface undergoes selective corrosion of Ge and Sb, resulting in pitting corrosion. Otherwise, with H2O2, the pc-GST film surface produces a Ge, Sb, Te oxide layer, thereby introducing a cyclic polishing process such as chemical oxidation, chemical and mechanical polishing, and sequential chemical oxidation. As a result, the polishing rate increased up to ~1000 Å/min and the surface roughness was decreased 0.86 nm.

靑少年非行의 環境的 原因分析과 豫防對策

이석호 朝鮮大學校 大學院 1989 국내석사

Recently, juvenile delinquency has increased quite a lot In its quantity and also become more brutalized, organized, and intellectulaized in its qualify. That phenomenon is common to various countries of the world under the process of industrialization even though there is a little difference in it. Juveniles should be protected and well brought up by our society. Juvenile delinquency should be prevented, for they will have a great effect on the development of OUT future society. This paper attempts to analyze environmental causes for juveile delinquency and devise a prepared countermeasure. In view of this goal, research papers, books, and recent statistical material on juvenile delinquency were singled out for special focus. The contents of this paper are as follows: Chapter I introduces the concepts o f juvenile delinquency. Chapter II deals with theoretical survey o f juvenile delinquency. Chapter III analyzes general aspects o f juvenile delinquency. Chapter IV studies and analyzes environmental factors of juvenile delinquency. chapter V deals with preventive countermeasures of juvenile delinquency. The aim of prevention of juvenile delinquency cannot be attained simply by legal measures and experts' guidance. Thus, all institutions including home, school, society, and goverment should make efforts in order to prevent juvenile delinquency. First, home is a primary society in which we start our first human relations, and p a r e n t s and their children live together on basis of affection, respect and mutual confidence. So home education should b e emphasized and frequent conversations between parents and their children should be made f o r mutual understanding. Second, school education on values and moral viewpoints should be established and encouraged for juveniles to be brought up whole-minded. Guidance and counseling in and around school should be made thoroughly. Third, the entire community should remove such social phenomena harmful for sound juvenile grouth and make efforts for building up sound social environment. Fourth, government and public institutions should not only prevent juvenile delinquency but also provide long and comprehensive counter measures for preventing it. Fifth, Guidance of juveniles should not be confined to an individual or a particular institution, but it should be made on a whole-nation scale. Sixth, social environment and counseling institution should be well provided to bring forth new youth cultures. In conclusion, recovery of morality is urgently needed, Home, school, government arid other social institutions should exert their best efforts for human morality to be recovered.

등분산 가정에 맞지 않은 자료에 대한 평균과 산포모수의 동시모형

이석호 서울대학교 대학원 2000 국내석사

휴머노이드 로봇을 위한 신경망 기반의 자기 적응 아키텍처에 관한 연구

이석호 한양대학교 대학원 2006 국내석사

이동통신 서비스품질이 고객만족에 미치는 영향 : 2G, 3G와 스마트폰 사용자 비교를 중심으로

이석호 대구가톨릭대학교 2011 국내박사

This study focused on analyzing the effects of service quality to ease of use, usefulness, switching barrier and of customer satisfaction and loyalty in the Korean telecommunication market. Also this study provided a momentum to investigate changes induced by introduction of a new product and service, i.e., smart phone. This study formulated a structural equational model, in which service quality was adapted as an exogenous variable and in which ease of use, usefulness, switching barrier were included as intermediate variables, having influences to the endogenous variable such as customer satisfaction and loyalty. First of all, since service quality of telecommunication terminals was looked upon as an essential factor in managing the service operation, it was unnecessary to consider its necessity in the model. In this study, ease of use and usefulness. In this study had adapted ease of use and usefulness of telecommunication terminals, originated from the TAM(technology acceptance model) to link the service quality with customer satisfaction. This study classified the service qualities of telecommunication into software quality and hardware quality in a practical point of view. The one is defined as call quality, terminal quality and telecommunication technology and the other is defined as charge rate, additional service, procedural convenience and customer supports. 17 hypotheses had been formulated, on which this research model was based, in order to test the significance of structured paths, suggested, in the previous articles, that having high interactive effects. This study collected the effective questionnaires of 693 respondents who had jobs nationwide and who used the telecommunication terminals and then analyzed with AMOS18 and SPSS18 to test the hypotheses. As a result, the conclusions are as follows: First, the service quality of telecommunication had significant effects on the switching barrier and showed the prominent difference between the technology generations. The users of generation 2 terminals had shown the highest switching barriers compared with the generation 3 and smart phone users. Also switching barriers played a significant role to link the service quality with customer satisfaction. Secondly, ease of use had a significant effect on the usefulness of customers, by which customers’satisfaction was influenced at low significant level. After all, the effects of service quality on ease of use, usefulness, switching barrier and satisfaction of the users of smart phones had shown at the highest level compared with the users of G2 and G3 users. The managerial policy could be suggested based on the results of this study as follows; First, the reinforcement of usefulness for the users of smart phone, having a high sensitiveness to the technological edges, should be noted. Second, for usefulness did not be linked directly and significantly with customer satisfaction, ease of use should be improved to enhance the usefulness for users of smart phone. Third, a sensitive strategy for the male users of smart phones must be necessary to improve the level of usefulness and switching barrier. Fourth, marketing efforts would be concentrated to improve the mobility propensity of the G3 users. Fifth, as the mobile variability of twenties had shown relatively high compared with the other generations, the same marketing efforts should be exerted to improve the inclination of retention. After all, the remarkable conclusion of this study should be paid attention that the survey was performed in the introduction stage of smart phone, and, from now on, the additional research would be necessary in the mature stage at the life cycle of smart phone.

불확실한 고장정보 하에서의 Fuzzy FTA에 관한 연구

이석호 仁川大學校 一般大學院 2001 국내석사

과거 산업설비들에 비해 요즈음의 산업설비들은 복잡하고 수많은 부품들로 구성이 되어 있다. 이런 특성 때문에 고장발생 빈도는 과거보다 낮아졌지만 고장으로 인한 파급효과는 증가하고 있다. 따라서 복잡한 구조의 시스템 및 부품들의 고장에 관한 적절한 해석과 분석의 필요성이 요구되었다. 기존연구에서는 대상 시스템 및 부품들에 대한 고장 예측을 하기 위하여 과거 그와 유사 시스템 및 부품들의 고장 데이터를 이용하여왔다. 하지만 고장을 예측하고자 하는 시스템 및 부품이 신제품을 경우 FT에서 정성적인 데이터와 정량적인 데이터가 동시에 주어질 경우 등과 같은 불확실한 고장정보를 가지고 있을 경우에는 전통적인 FTA를 사용하여 고장을 예측하는데 어려움이 있다. 따라서 본 연구는 위와 같은 경우에 있어서 퍼지이론을 사용하여 고장예측을 하기 위한 방법을 다루고 있다. 즉, 정확한 고장 데이터가 없는 경우 시스템이나 부품의 고장을 정성적인 언어변수로 표현한 후 퍼지이론을 이용하여 정량적인 값으로 변환, 그 값을 고장예측 값으로 이용하고자 하였다. Today, facilities are composed of many complex components or parts. Because of this characteristics, the frequency of failures is increasing, but the strength of failures is increasing; therefore, the failure analysis about many complex components or parts was needed. In the former research about Fault Thee Analysis, failure data of similar facilities have been for forecasting about target system or components, but in case that the system or components for forecasting failure is new or qualitative and quantitative data are given simultaneously, there are many difficulty in using Fault Tree Analysis with this incorrect failure data. Therefore, this paper deal with the Fault Tree Analysis method which be applied with Fuzzy theory in above case. In cast that, therefore, if there is no the correct failure data, it is represented a system or components as qualitative variable. subsequently, it converted to the Quantitative value using fuzzy theory, and the values used as the value for failure forecast.