生存函數의 非母數的 推定에 관한 硏究

이광호 경북대학교 1988 국내박사

능동차폐 MRI 초전도 자석에 대한 최적 설계 방법

이광호 동아대학교 대학원 1998 국내석사

MRI (Magnetic Resonance Imaging) 용 초전도 자석은 고 균일 자계를 발생한다. 이로 인해 누설 자장이 증가하기 때문에 자기 차폐 방법 필요하게 된다. 자기차폐 (Magnetic Shielding) 에는passive shield 방법과 active shield 방법이 있는데 주 코일 외부에 초전도 차폐 코일을 배치하여 역자장을 발생 시켜 누설 자장을 차폐하는 방법이 주로 사용되고 있다. 본 연구에서는 고자계, 고균일 초전도 마그네트의 누설 자장 억제 장치로 능동차폐를 사용하는 경우에 차폐 마그네트의 최적설계 방법 및 특성 해석에 대하여 논하였다. 최적설계 방법으로는 가중 최소 2승법을 적용하여 능동 차폐의 마그네트 배치와 형상 최적치수를 도출하고, 설계 검증으로는 유한 요소법을 적용하여 자속분포 특성 등을 고찰하였다. An optimal design approach is presented for homogeneity superconducting magnet with superconducting active shield especially for use in magnetic resonance imaging system. This paper describes an optimal design method for Magnetic Resonance Imaging (MRI) system. The applied optimal design technique if weighted least square(WLS) method for solving the nonlinear system problem. WLS is used to select configurations using the least amount of conductor, exhibiting the smallest level of field inhomogeneity and resulting in the least level of stray field. The interest in better actively magnetic shielding configuration is the minimum volume of superconducting magnet. This model is used to develop a multiple-shield configuration for a 1.5 T MRI magnet. A weighted least square method is used to select configuration using the least amount of conductor, exhibiting the smallest level of field inhomogeneity and resulting in the least level of stray field. The field homogeneity is the 5 gauss stray field contour is within 4m axially and 3m radially from origin. In this paper, active shield method is studied that shielding coils out of main coils can reduce the stray field by producing opposite field.

PZT 인치웜 메카니즘을 이용한 고하중/대변위 구동시스템 개발

이광호 강원대학교 대학원 2008 국내석사

This paper presents the design of inchworm motor for high precision actuator system of large-displacement and high-force. The inchworm motor can realize the long stroke with high load capacity and resolution by clamping and extending sequences of the PZT. It can attain high resolution and high force from the accurate displacement of extension and contraction motion. The proposed inchworm actuator consists of two clamping parts on the top and the bottom side of the inchworm body, and one extension part in the middle of the actuator. The two clamping PZT are provide the holding force and the extending PZT is provide the displacement of tool guide. In generally, PZT has the low tensile strength and shear. Therefore, design of the inchworm motor has been focused on optimizing the pre-load housing mechanism to reduce the shear force. The preload also creates additional return forces to aid in the release of the clamping mechanisms. The detailed design of the pre-load mechanism was performed using finite element analysis. A prototype of the inchworm motor was fabricated and tested with respect to the variations of the serial and parallel connection of the PZTs.

초등교사가 인지하는 학습조직문화 교사학습동기, 학교장과의 교환관계(LMX), 수업전문성 간의 구조적 관계

이광호 숭실대학교 대학원 2015 국내박사

본 연구는 초등교사가 인지하는 학습조직문화, 교사학습동기, 학교장과의 교환관계(LMX), 수업전문성 간의 구조적 관계를 분석하는 데, 목적을 두었다. 연구목적 달성을 위하여 다음과 같이 연구문제를 설정하였다. 첫째, 학습조직문화는 교사학습동기에 영향을 미치는가? 둘째, 학습조직문화, 교사학습동기는 학교장과의 LMX에 영향을 미치는가? 셋째, 학습조직문화, 교사학습동기, 학교장과의 LMX는 수업전문성에 영향을 미치는가? 본 연구를 위해 2015년 2월 2일부터 27일까지 서울특별시 소재 초등학교 교사 802명을 대상으로 설문을 실시하였으며, 그 중 744부를 분석에 사용하였다. 연구모델을 통계적으로 검정하기 위해 SPSS 18.0과 Amos 18.0 프로그램을 사용하였다. 분석결과를 요약하면 다음과 같다. 첫째, 학습조직문화는 교사학습동기에 직접적으로 영향을 미치는 것으로 나타났다. 둘째, 학습조직문화와 교사학습동기 중 외적학습문화는 학교장과의 LMX에 직접적인 영향을 미쳤으나, 내적학습동기는 영향을 미치지 않았다. 셋째, 학습조직문화와 교사학습동기는 수업전문성에 직접영향을 미쳤다. 그러나 학교장과의 LMX와 수업전문성의 영향관계는 확인할 수 없었다. 마지막으로, 학습조직문화는 수업전문성에 직접 영향을 미쳤으며, 교사학습동기를 매개변수로 하여 간접적으로 영향을 미쳤다. 이와 같이 본 연구의 결과 학습조직문화, 교사학습동기, 학교장과의 LMX와 수업전문성 간의 구조적 관계가 입증되었으며, 학교장과의 LMX와 수업전문성 관계를 제외하고 기존의 연구 결과들과 대부분 일치하는 것으로 나타났다. 즉, 학습조직문화와 교사학습동기가 수업전문성에 영향을 미치는 변인이라는 것을 확인하였으며, 교사학습동기 중에서도 내적학습동기가 외적학습동기보다 수업전문성에 더 관련이 깊다는 것을 입증하였다. 또한 학습조직문화는 교사학습동기와 학교장과의 LMX에도 영향을 미치는 것으로 밝혀졌다. 그러므로 수업전문성을 높여 학교교육력을 제고하기 위해서는 교사의 학습동기를 강화하고, 학습조직문화의 수준을 높이는 것이 효과적인 것으로 나타났다. The purpose of the study was to analyze the structural relationships between the variables of learning ㅐorganization culture, teacher's learning motivation, LMX of principal-teacher, teaching professionalism perceived by elementary school teachers. The study focused on three research questions. First, does the learning organization culture affect teacher's learning motivation? Second, do the learning organization culture and the teacher's learning motivation affect LMX of principal-teacher? Third, do the learning organization culture, the teacher's learning motivation and LMX of principal-teacher affect teaching professionalism? From February 2, 2015 to February 27, 2015, questionnaires were distributed to 802 elementary school teachers working in Seoul, Korea. Of these, 744 questionnaires were ultimately used in this study. SPSS 18.0 and Amos 18.0 were used to verify the research model statistically. The results of the study were as follows: First, the learning organization culture directly affected the teacher's learning motivation. Second, the learning organization culture and extrinsic motivation as a teacher's learning motivation affected LMX of principal-teacher, but intrinsic learning motivation didn't affected. Third, the learning organization culture and teacher's learning motivation directly affected teaching professionalism, but the relationship between LMX of principal-teacher and teaching professionalism can't. confirmed. Finally, the learning organization culture directly affected teaching professionalism and indirectly affected teaching professionalism through teacher's learning motivation. Thus, structural relationship between the learning organization culture, teacher's learning motivation, LMX of principal-teacher and teaching professionalism was verified. These findings mostly corresponded with previous study results. but relationship between LMX of principal-teacher and teaching professionalism was not verified. In order words, the learning organization culture and teacher's learning motivation was identified as the most influential variable for a teaching professionalism, and intrinsic motivation as a teacher's learning motivation was affected better than extrinsic learning motivation for a teaching professionalism, Also the learning organization culture and teacher's learning motivation were directly affected LMX of principal-teacher. Therefore, to enhance teaching professionalism, it is effective to intensify teacher's learning motivation and to improve the level of learning organization culture.

A. Vivaldi 의 Concerto for Two Trumpets에 대한 분석 연구

이광호 강원대학교 2009 국내석사

트럼펫은 금관악기 중에 가장 오래된 역사를 가지고 있으며, 현재 가장 자주 사용되는 악기이며 그 기능과 구조면에서 많은 진보를 가져온 악기이다. 중세 시대의 트럼펫은 악기소리의 힘찬 성격으로 인해 주로 군사적인 목적이나 궁전의 의전행사용으로써 신호나팔이나 화려한 팡파레를 연주하는데 사용되었다. 그 후 바로크 시대에는 오케스트라 속에 들어오게 되어 오페라와 교회음악에서 주로 기쁨과 승리의 감정을 표현하였으며, 19세기에 이르러 밸브 시스템이 발명되어, Bb조 트럼펫이 모든 종류의 음악에 널리 쓰이기 시작하여 오늘날의 이르게 되었다. 비발디(Antonio Vivaldi 1678~1741)는 바하(J. S. Bach, 1685~1750), 헨델 (G. F. Handel, 1685~1759)과 함께 바로크 음악의 대표적 작곡가로 소나타, 심포니아, 오페라, 콘체르토, 모테트, 미사 등 다양한 장르의 걸쳐 많은 작품을 남겼다. 특히 비발디는 많은 작품의 콘체르토를 작곡하였으며, 코렐리(A. Corelli, 1653~1713)와 토렐리(G. Torelli, 1658~1707)의 영향을 받아 바로크 콘체르토의 형식과 악장구성 및 짜임새를 확립하였다. 또한 바하를 비롯한 동시대의 많은 다른 작곡가들에게 전형적인 콘체르토의 틀을 제시하여 고전 콘체르토의 기틀을 마련하는데 공헌하였다. 비발디의 1711년에 작곡한 ??트럼펫 두 대를 위한 협주곡??(Concerto for Two Trumpets) 는 극소수의 트럼펫 협주곡 중의 하나이며, 두 대의 트럼펫을 위한 협주곡은 이 곡이 유일하다. 베네치아의 팡파르 주제가 상쾌하기 그지없는 제 1악장, 제 1악장과 제 3악장을 연결하는 교량 역할을 하는 제 2악장 'Largo', 상승 분산 화음으로 경쾌하고 화려한 제 3악장이 모두 비발디가 남긴 바로크의 찬란한 음악 유산이다. 본 연구는 트럼펫의 기원과 역사적인 변천 과정을 통하여 어떻게 현대의 트럼펫의 이르게 되었는가를 조사 한 후 비발디의 생애와 음악적 성향, 그리고 그의 작품을 살펴보고, 각 악장에 대하여, 형식, 선율, 조성, 리듬, 화성적 특징을 분석하고, 바로크 시대의 음악과 협주곡의 초기 발전 과정을 통해 이를 토대로 연구해 보고자 한다. Antonio Lucio Vivaldi(1678~1741), who was a priest, is the one of the most influential composers of the late baroque instrumental music. He composed many religious vocal music, songs including 40 operas. Especially his instrumental music plays an important role in the history of music. In concertos, he developed the forms by Corelli, and composed solo and ensemble concertos for strings or wind instrument. His decisive juxtapositional attempt of ritornello and solo part brought up the new possibility that the soloist can show his(/her) own technician. More than 450 tunes are well known or can be traced: 220 concertos for a violin, 37 concertos for a bassoon, 27 concertos for a cello, 25 concertos for two violins, 11 concertos for an oboe, 10 concertos for a flute. 32 concertos for over three instruments are belonged to before-mentioned category, but they have their own field. Vivaldi Concerto for Two Trumpets in Bb Major, RV.537 has the musical features like these on each movement. The first movement as the sonata form has the repeated structure of the exposition and passage. This represents its subject by progressing repeatedly. Although the second movement has little phrase, it plays the connective role of the first and the third movements by giving a life to the harmony fairly in a slow tempo. The structure of the third movement, a rondo form, is transformed and magnified. The tonic cord and the dominant cord are the main keys and they certainly make an appreciation on its exposition. Also its melody has the tonic and the dominant keys, and it repeats going-up or going-down and order or leap passages. These elements express the theme copiously. Above all things, concord leap often appears, and this makes the canto and the accompaniment more harmonic. From this study, we can understand the musical characteristics of Vivaldi Concerto for Two Trumpets in Bb Major, RV.537 and Vivaldi's own world about his whole works, and moreover it helps us to comprehend the structural and the harmonic features of the classicism concertos.

Web-cam을 이용한 WLAN 기반 모니터링 시스템 구현

이광호 群山大學校 大學院 2006 국내석사

Recently provided Home network industry is widely used because of electric home appliances, digitality and internet in home. The increasing of mutual communication in all electric home appliances TV, digital camera, sensor device is predicted. It is not only the inside but also the outside as per the need and convenience of automatic control. This thesis is purpose for the proof of the usefulness and implementation of technology by linux based on embedded system, 802.11b Ap(Access point). Iptables, the control of wireless system using web service implementing supervising system using web cam. After this we have to develop a device driver for wireless data transport with other devices and transporting easily multimedia data in over 100Mbps. The study of accessible confirmation and security technology in a system is demanded for the user who is confirmed.

공압식 좌심실 보조장치의 Diaphragm-Housing 접합방법의 개발 및 평가

李光虎 단국대학교 2002 국내석사

공압식 좌심실 보조장치(Ventricular Assist Device; VAD)의 내구성 및 제작 방법의 개선을 위하여 diaphragm과 blood housing의 접합 부분에 공정에 적용했던 mesh의 삽입은 diaphragm의 기계적 내구성은 증가 시킬 수 있었지만, mesh의 접합부분의 혈전 현상 및 반복되는 응력으로 인한 diaphragm과 blood housing의 일탈 현상을 관찰 할 수 있었다. 본 논문에서는 mesh 삽입으로 인한 VAD 기계적인 내구성과 더불어 blood housing내의 혈액 적합성의 개선을 위해서 강도 및 경도가 우수하고 화학적으로 안정하며 내마모성이 우수한 Alumina Ball을 이용한 Milling 공정을 mesh 삽입 후 diaphragm-blood housing 접합에 도입하였으며, milling통한 diaphragm-blood housing의 접합부분의 표면의 물성 변화를 optical microscope, scanning electron microscope, 및 atomic force microscope으로 관찰하였으며, 인장강도 및 연신율의 변화를 측정하여 기계적 내구성의 증가를 증명하였으며, 혈액적합성에 대한 평가는 단백질 흡착, 혈소판 점착 실험을 통하여 Alumina Ball Milling으로 인한 표면의 압착 및 평탄화로 혈액 적합성의 향상을 관찰 할 수 있었다. 공압식 VAD의 제작공정에 Alumina Ball Milling 도입함으로써 diaphragm-blood housing 접합부분 대한 신뢰성을 높일 수 있었으며, 기계적 성능의 증가와 더불어 물리적인 혈액 적합성의 향상으로 인한 VAD의 내구성을 증가시킬 수 있었다. 주요어: 공압식 좌심실 보조장치(Ventricular Assist Device; VAD), Alumina Ball Milling(ABM), Diaphragm-Blood housing 접합, 혈액적합성 This paper describes a novel Alumina Ball Milling (ABM) technique for fabrication of pneumatic Ventricular Assist Device (VAD). The diaphragm must be firmly attached to the blood housing, during the designed lifetime for the VAD pump cycle. During gluing the diaphragm, the mesh is used to increase the adhesive strength between the diaphragm and the housing. But in this case, the meshed diaphragm-the housing junction(D-H junction) has an irregular and rough surface. In order to overcome this problem, a novel ABM technique to improve mechanical durability and blood compatibility of D-H junction is suggested and its feasibility is proved by the various evaluation methods. 3 chemically stable alumina balls, of which diameter is about 5mm and which is made from sintering alumina powder, are exploited for the ABM. The balls located on the junction track rotate as the diaphragm-housing assembly revolves. By the impact generated by the centrifugal force, the surface of D-H junction is flattened and firmly adhered. To evaluate the modified the D-H junction, the surface is observed by the optical microscope, the scanning electron microscope(SEM), and the atomic force microscope(AFM). The mechanical properties of the D-H junction was examined by measuring the tensile strength and elongation break curves. The blood compatibility was tested by the protein adsorption and platelet adhesion. The results of evaluation demonstrated improved superficial smoothness, mechanical properties and blood compatibility. As a conclusion, the proposed ABM technique proved to be the useful method for the enhancement of D-H junction. Key-words: Ventricular Assist Device (VAD), Alumina Ball Milling (ABM), Mesh, Diaphragm-Housing Junction (D-H Junction)

Pin계 완화형 강유전체의 치밀화 및 유전특성

이광호 서울대학교 대학원 2000 국내박사

<洪桂月傳> 硏究

이광호 韓國敎員大學校 1994 국내석사

The study is to closely inspect the different version of 〈Hongkyew□l-j□n〉 woman's heroic novel, its periodical and ideal background, aspects of conflict and the meaning of its conquest, and also to study the work on the whole through contrast with a similar heroic work-〈Ch□ngsuj□n-j□n〉. In chapter Ⅱ, Ⅰ closely exaelne bibliography, characteristic and sequency on the basis of 16 kinds of the handwritten verslon and two printed version which I come into contact with. As a result of this, I came to know that they are same kind. Because a difference between derivation and transformation doesn't nearly exist, the contents and structures are similiar. Two kinds af printed versions have some difference but most of them are nearly same. As a result of assumption of writing period of these different versions, I concluded that 〈Hongkyew□l-j□n〉 belongs to post type. On the other hand, Kim Dong-uk 6 bon (1879) was written earlier than any other version, and then Kim 4 bon (1891), Kim 2 bon and Ch□ng 7 bon (1893), Ch□ng 2 bon (1907), Chortg 5 bon (1911) and ch□ng 6 bon (1917) were completed sequently. Other different versions were possibly transcribed during the same period but we cannot assume it correctly. I assumed good versians according to content paragraph and structual element. From the standpoint of the structure of woman's heroic novel, I thought of the different versions which were composed of the meeting parents and retaliating of enemy as being completed. In chapter Ⅲ, I examine a periodical and ideal background. This work ivas created with the intention of the extension of woman's right through woman's heroic novel such as 〈Hongkyew□l-j□n〉, becasuse woman's self-consciousness began to come into existence in this period. The ideal background of this work have Confucian ideas, Buddhist ideas, Taoism ideas, Modern ideas, etc. Confucian ideas includes the idea of loyalty and filial piety, the idea rising in the world and gaining fame, the idea of ancestor worship. Buddhist ideas, the idea of defense of the fatherland, the idea of requital of kindness. Taoism ideas, the idea of a Taoist hermit with supernatural powers and hiding oneself from the world. Modern thonghts, the education of woman, woman's intention of rising in the world and the equality of the sexes. In chapter Ⅳ, I analyzed the developing ways of conflicts and meaning of conquest. The first conflict in this work is conflict between kyew□l, the hero and Manggil, the enemy's genera). The second is domestic conflict between kyew□l and Boguk, her husband. The other conflicts are her mental ones. In the course of those conflicts, kyew□l meets parents through processing to ouercome conflict with Manggil. And kyew□l thinks that loyality and filial piety will come true by saving the country in its crisis. In chapter Ⅴ, I examine the meaning and structure of this work. I analyzed this work into orderly and antagonistic structure, and caught hold of the meaning of the work. I divided the order structure of 〈Hongkyew□l-j□n〉 into 10 paragraphs: the birth and backfround of the hero →the remarkable characteristic (of the hero) →the trial and relief → the studying course and the passing the old state examinations → the enemy's invasion and going to war → the enemy's repelling and meeting of parents → the victory of the war and a remard → disclosure of her identity, marriage and conflict → reinvasion and going to war again → the happiness of hero and reminiscences. In chapter Ⅵ, I contrast this work with 〈Ch□ngsuj□n-j□n〉, and also examine something in common and differences and relationship. Or I study the meaning of history of novel. The studying vorsion of 〈Ch□ngsuj□n-j□n〉 is closely examined thvough 〈Ch□ngmuny□n 54 Jangbon〉 which has been knoivn as good version and 〈Y□jangkunj□n〉 . So 1 could see that 12 paragraphs are same or similiar in contents of 〈Hongkyew□l-j□n〉 and 〈Ch□ngsuj□n-j□n〉, and that 2 paragraphs newly discovered iq 〈Ch□ngsuj□n-j□n〉 when compared with 〈NY□jankun-j□n〉 . In historical novel point of view, this work is the most important work of woman's heroic novel which have been read up to the middle of 20th century and also had given influence to 〈Sinsos□l〉. Because the writer selected woman as hero, the domain of a subject matter expanded. At the same time this work overcame the limit of woman and contributed the extension of woman's right, rising in the world of woman, the equality of the sexes as advocating of woman's consciousness being equal with man. All things considered, We have enlarged the understanding of 〈Hongkyew□l-j□n〉 and to some extent made different versions, its structure ond conflict clear. about Different versions that haven't been acquired or have acquired must be made clear the right time of writing. We need to analyze writer and reader, and also need to be extensively compared with other woman's heroic novels. In this respect, it leaves much to be solved.

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이광호 한양대학교 대학원 2006 국내석사