Comparative study of design methods for sliding of perforated wall caisson breakwater

학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2014. 2. 서경덕.케이슨 방파제를 설계함에 있어서 방파제의 주요 파괴 모드인 활동에 대하여 안전율을 이용하는 결정론적 설계법이 사용되어 왔다. 하지만 구조물에 작용하는 하중과 구조물의 저항력 등에 대한 불확실성을 안전율이라는 간단하지만 경험적인 상수를 대신하기 때문에 활동량에 대한 정량적, 상대적인 평가가 어려워 구조물을 과대 혹은 과소 설계할 가능성을 내포하고 있다. 이러한 설계변수의 불확실성을 확률적 개념으로 고려하여 케이슨의 활동량을 계산하는 성능 설계법이 제안되고 있다. 무공케이슨 방파제의 성능 설계법은 과거 여러 연구자들에 의해 연구가 진행되어 왔으며, 현재 그 틀이 거의 잡혀져 있다 해도 과언이 아니다. 반면, 유공케이슨 방파제의 경우 전면의 유공벽 구조에 의한 파력 감쇄에 따라 구조물의 안정성이 증대되는 효과가 있음에도 불구하고 이와 관련된 연구는 국내∙외적으로 아직 많이 이루어지지 않았다. 본 연구에서는 기존의 무공케이슨 방파제의 성능 설계법 이론을 유공케이슨 방파제에 확장, 적용하여 이론의 적용 가능성 여부를 판단한다. 또한 결정론적 설계법의 결과와 비교 분석하여 합리적인 설계법을 결정 한다. 이는 유공케이슨 방파제의 성능 설계법에 대한 기준을 제시하기 위해 수행되는 기초 연구이다. 따라서 향후 유공케이슨 방파제의 성능 설계에 매우 중요한 지표가 될 것으로 예상된다.In the design of a caisson breakwater against sliding, the deterministic design method has been used with consideration of certain margin of safety factor. However, it is difficult to quantitatively and comparatively evaluate the sliding distance using the safety factor because of the uncertainty of the design variables. It may cause the over- or under-design of the structure. Therefore, it is required to develop probabilistic design methods (e.g., performance-based design method) to consider the uncertainties of the design variables by computing the sliding distance of the caisson. The performance-based design method of a solid-wall caisson breakwater has been investigated by many researchers and its framework is almost completed. On the other hand, researches on a perforated-wall caisson breakwater have been scarcely made despite the fact that it has greater structural safety due to decreased impulsive wave force at the perforated-wall. In this study, the conventional performance-based design method of the solid-wall caisson breakwater has been expanded and applied to the perforated-wall caisson breakwater in order to examine the feasibility of its application. In addition, a comparative analysis is made between the deterministic design method and performance-based design method. It will serve as a basic research to standardize the criteria of the performance-based design method of a perforated-wall caisson breakwater. Moreover, it is expected to be an important and useful tool in designing a stable perforated-wall caisson breakwater in the future.ABSTRACT..................................................................................................... i LIST OF TABLES ......................................................................................... v LIST OF FIGURES ...................................................................................... vi LIST OF SYMBOLS..................................................................................... ix CHAPTER 1 INTRODUCTION .................................................................. 1 1.1 Necessity and background of research ................................................... 1 1.2 Research trends ...................................................................................... 3 1.3 Research details and methodology......................................................... 7 CHAPTER 2 THEORITICAL BACKGROUND ..................................... 10 2.1 Deterministic design method................................................................ 10 2.2 Reliability design method..................................................................... 12 2.2.1 Overview of reliability design method.......................................... 12 2.2.2 Level III reliability design method................................................ 13 2.2.3 Performance-based design method................................................ 14 CHAPTER 3 DESIGN VARIABLES......................................................... 18 3.1 Deepwater wave ................................................................................... 18 3.2 Significant wave period........................................................................ 20 3.3 Significant wave height at breakwater site........................................... 22 3.3.1 Directional spreading function...................................................... 22 3.3.2 Frequency spectrum ...................................................................... 24 3.3.3 Wave transformation..................................................................... 25 3.4 Individual wave.................................................................................... 31 3.5 Calculation of wave force acting on solid-wall caisson breakwater .... 33 3.6 Calculation of wave force acting on perforated-wall caisson breakwater .................................................................................................................... 37 3.7 Doubly-truncated normal distribution.................................................. 42 3.8 Uncertainty of design variables............................................................ 48 3.9 Time series of wave force .................................................................... 50 3.9.1 Time series of wave force acting on solid-wall caisson................ 50 3.9.2 Time series of wave force acting on perforated-wall caisson ....... 53 3.10 Expected sliding distance................................................................... 58 3.11 Exceedance rate.................................................................................. 60 CHAPTER 4 RESULTS AND ANALYSIS ............................................... 62 4.1 Validation of model.............................................................................. 62 4.2 Design conditions of caisson breakwater ............................................. 65 4.3 Computation results ............................................................................. 68 4.4 Comparison and analysis...................................................................... 84 CHAPTER 5 CONCLUSIONS AND FUTURE STUDY ......................... 92 5.1 Conclusions.......................................................................................... 92 5.2 Future study.......................................................................................... 95 References ..................................................................................................... 97 초 록............................................................................................................ 101Maste

A procedure for the computer-guided implant planning: A narrative review

Prosthetic-driven implant placement is a concept considering the dental implant restoration first based on the final form of that prosthesis to be restored. The latest development of the imaging technology and digital dentistry was able to be obtained the high quality images of CBCT with low radiation exposure and it has also enabled the process to reconstruct the intraoral state in three dimensions due to the development of the intraoral, model and impression scanner. Computer-guided implant placement simulations and template production was able to be more widely used in this context. In this narrative review, the features and the types of implant surgical guides will be introduced. It will also be described the diagnosis and treatment plan using computerguided implant software to reduce the number of visit and to increase the accuracy of the implant surgery through the top-down approach based on the shape and location of the final prosthesis.ope

Fabrication of immediate complete denture using Campagna tray technique

An immediate complete denture is considered as restoration for lost natural teeth, which is fabricated following the extraction of the remaining teeth. Current esthetics and function can be retained by using immediate denture without edentulous period. However, the major disadvantages of immediate denture relate to the difficulties associated with taking accurate definitive impression and predicting the results of immediate denture. In this case report, the Campagna tray technique was used to take the final impression in a 49-year-old male patient presented with all remaining teeth diagnosed as hopeless teeth. Surgical templates were used for alveoloplasty after extraction. The immediate complete dentures were then delivered. The clinical assessments of immediate dentures showed good esthetic and functional outcomes. The patient showed high level of satisfaction.ope

Molecular characterization of whole genome duplication in Panax ginseng

학위논문 (박사)-- 서울대학교 대학원 : 식물생산과학부(작물생명과학), 2015. 8. 양태진.Panax ginseng, belonging to Araliaceae, has been used as medicinal plant for centuries. Even though medicinal effect of ginseng is well-studied, the genomic information of ginseng is very limitedly available. Genome of P. ginseng has been considered to be experienced two rounds of whole genome duplication (WGD) based on expressed sequence tag (EST) sequences. However, there was no sign of the WGD at the genomic sequence level, except that multiple band patterns have been consistently observed during PCR amplification even though we used unique gene sequences in P. ginseng. Here, I tried to define the genome duplication at the sequence level. First, I analyzed the sequences of multiple bands derived from unique EST-SSR markers and at second, I deeply investigated four paralogous gene-rich genome blocks using whole genome draft sequence of P. ginseng. Re-amplification and sequencing of the individual bands for EST-SSR markers revealed that two bands around the expected size were genuine amplicons derived from two paralogous loci. Sequences derived from the two loci showed high similarity including the same primer-binding site, but each locus could be distinguished by the based on SSR copy number variations and additional SNPs or InDels. The comparison of the paralogous blocks in the draft sequence revealed that sequences are highly conserved between two recent duplicated paralagous scaffolds although there was some InDels derived from transposable elements. However, paleo duplicated paraloguous blocks showed little conservation only in genic regions. The paralogous gene pairs were identified and molecular clocks were calculated in four genome blocks. I estimated that first WGD happened at around 25.8 million years ago (MYA) which is common phenomena in all Panax species, and another recent WGD happened at around 2.54 MYA between P. ginseng and P. quinfuefolius only. Since high sequence homology between recent WGD blocks interrupts the amplification of single band in marker development, I developed the strategy of designing sequence tagged site (STS) primers, one for dCAPS based on single nucleotide polymorphism (SNP) site between cultivars, and another complementary primer for locus-specific primer based on SNP between paralogs. Genetic mapping using two STS markers derived from recent paralog blocks, Block 1 and Block 2, showed different segregation pattern in F2 population between Yunpoong and Chunpoong, which indicates that two recent duplicated paralog blocks are located independently at chromosomal locus and those were derived from WGDs. This study provide the first insight for WGD-derived genome structure in sequence level. The information and finding will be helpful for further ginseng genomics study for improving draft sequence quality and chromosome anchoring of scaffolds, and genetic mapping.GENERAL ABSTRACT I LIST OF TABLES VII LIST OF FIGURES VIII LIST OF ABBREVIATIONS IX GENERAL INTRODUCTION 1 REFERENCES 3 CHAPTER I 6 Evidence of genome duplication revealed by sequence analysis of multi-loci expressed sequence tag-simple sequence repeat bands in Panax ginseng Meyer ABSTACT 7 INTRODUCTION 8 MATERIAL AND METHODS 10 Sample preparation and preliminary PCR 10 Sequencing of each individual band among multiple bands 10 Sequence analysis and design of locus-specific primer for gm47n marker 11 RESULTS 12 Separation and re-amplification of individual bands 12 Sequence comparison of Band-A and Band-B 14 Locus-specific PCR amplification for the gm47n marker 18 DISCUSSION 21 PCR amplification of two paralogous loci derived from genome duplication in P. ginseng 21 Sequence variation between paralogous bands 22 Additional artifact bands are caused by coexistence of two paralogous bands 22 Development of locus-specific markers and future application 23 REFERENCES 25 CHAPTER II 29 Micro-collinearity within Panax ginseng genome sequences resulted from two rounds of whole genome duplication ABSTRACT 30 INTRODUCTION 32 MATERIAL AND METHODS 34 Plant material and extraction of DNA and RNA 34 Genome sequencing, assembly and repeat masking 35 Transcriptome sequencing and assembly 35 Selection of homoeologous scaffolds and comparative analysis 36 Gene annotation and expression profiling of homoeologous scaffolds 36 Development of STS markers in micro-collinearity blocks 37 RESULTS 39 Genome sequence and transcriptome assembly. 39 Identification of homoeologous scaffolds from draft sequence. 42 Annotation of the homoeologous scaffold sequences 46 Comparative analysis of the homoeologous scaffold sequences 48 Paralogous gene pairs and its divergence in four paralogous blocks 59 Expression profiles of paralogous gene pairs. 62 Designing locus-specific SNP markers 66 DICUSSIONS 69 REFERENCES 75 APPENDIX 81 ABSTRACT IN KOREAN 92Docto

환경보호를 위한 토지이용규제법 및 토지공개념의 대안에 대한 고찰 : 공공신탁이론과 국민신탁(National trust)

학위논문(석사)--서울대학교 대학원 :법학과,2005.Maste

무선 센서 네트워크에서의 클러스터 기반 프로토콜에 관한 연구

Thesis(doctors)--서울대학교 대학원 :전기. 컴퓨터공학부,2008.2.Docto

위기 이후 프로스포츠팀 사회적 책임 활동의 적합성이 팀 충성도에 미치는 영향: 강등과 승부조작을 중심으로

학위논문 (석사)-- 서울대학교 대학원 : 체육교육과, 2015. 2. 강준호.본 연구의 목적은 위기관리 차원에서 프로스포츠팀 사회적 책임 활동의 효과를 검증하는 데에 있다. 특히 위기유형에 따라 적합성 측면에서 그 차이를 팀 충성도로 알아보았다. 본 연구에서는 강등과 승부조작이라는 위기를 통해 국내 프로스포츠팀 사회적 책임 활동의 효과를 극대화하기 위한 전략적 접근방식을 시도하고자 하였다. 본 연구의 결과는 다음과 같다. 첫째, 승부조작은 강등보다 팀 충성도에 부정적인 영향을 미치는 것으로 나타났다. 둘째, 강등이 팀 충성도에 미치는 영향은 사회적 책임 활동의 적합성이 높을수록 줄어들었지만, 승부조작에서는 적합성이 조절효과를 갖지 못하였다.Ⅰ. 서 론 1 1. 연구의 배경 1 2. 연구의 필요성 4 3. 연구의 목적 8 Ⅱ. 이론적 배경 10 1. 기업의 사회적 책임(Corporate Social Responsibility) 10 1) 사회적 책임 활동의 개념과 효과 10 2) 적합성과 동기추론 13 3) 스포츠와 사회적 책임 활동 15 4) 위기와 사회적 책임 활동 16 Ⅲ. 연구모형 및 가설 18 1. 위기유형과 팀 충성도 19 2. 위기유형과 적합성에 따른 팀 충성도 20 Ⅳ. 연구방법 21 1. 연구대상 및 자료표집 21 2. 실험 자극물 및 조사도구 22 3. 자료처리 23 Ⅴ. 연구결과 25 1. 신뢰도 분석결과 25 2. 가설 검증 26 1) 가설 1 검증 결과 26 2) 가설 2 검증 결과 29 Ⅵ. 논의 및 결론 32 1. 논의 32 2. 결론 39 참고문헌 41Maste

금속 나노 구조체의 물리화학 및 유기분자 자기조립 특성 규명과 표면 증강 라만 산란 기질로의 응용에 관한 연구

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수퍼그래픽에 나타난 일루젼 표현에 관한 연구

학위논문(석사)--서울대학교 대학원 :산업디자인과 시각디자인전공,1995.Maste

우리나라 사금융시장의 문제점과 개선방안 : 대부업을 중심으로

학위논문(석사)--서울대학교 대학원 :소비자학과,2004.Maste