Web GIS-Based Flood Management System for the Architectural Heritage

학위논문 (석사)-- 서울대학교 대학원 : 건축학과, 2015. 2. 이현수.In recent years, flood damage is drastically increasing due to global warming, urbanization, irregular weather condition and so on. Especially, flash flood by torrential rain and locally heavy rainfall damage the architectural heritage before an appropriate measure is taken. Multilateral efforts are put into solving the issue, however, weakness in effectively responding to the flood risk toward the cultural heritage buildings located all over the nation exists. To solve the problem, the Cultural Heritage Administration conducted researches from 2009 to 2012. Despite efforts, however, there are difficulties in actively corresponding to the flood disaster due to unclassified research data, low accessibility to the information and so on. To address these limitations, this research attempts to present an effective flood management system by integrating Web Geographic Information System (Web-GIS) with Relational Database Management System (RDBMS) and using real-time rainfall data. Compared to the traditional system, suggested Web GIS based flood management system is expected to be more efficient, adaptable and flexible. Ultimately, this research aims to be more supportive tool for flood risk managers decision making.Chapter 1 Introduction 1 1.1 Research Objective 1 1.2 Research Scope and Process 2 Chapter 2 Literature Review 5 2.1 Flood Risk Management for Architectural Heritage 5 2.2 Flash Flood and Response Time 8 2.3 Flood Risk Managers Decision Making 10 2.4 Summary 12 Chapter 3 Database for the System 13 3.1 Database Overview 13 3.2 Data Classification and DB Development 15 3.3 Entity Relationship Diagram Design 18 3.4 Summary 20 Chapter 4 Web Geographic Information System 21 Chapter 5 Flood Management System 23 5.1 System Requirements 23 5.2 System Architecture Design 25 5.3 System Interface and Function 27 5.4 Expression of Real Time Flood Risk 29 5.5 Provision of Reaction Manual 33 5.6 Summary 35 Chapter 6 System Usability Evaluation 36 6.1 Overview 36 6.2 Selection of Subjects 37 6.3 Evaluation Factor 38 6.4 Result and Analysis 39 Chapter 7 Conclusion 42 7.1 Research Results 42 7.2 Contributions 43 7.3 Limitations and Future Researches 44 Reference 45 Abstract (Korean) 50Maste

쇤(D. A. Schon)의 실천적 인식론에 나타난 교육적 실습의 조건분석

학위논문(석사)--서울대학교 대학원 :교육학과 교육학전공,2000.Maste

메타게노믹 방법에 의한 다양한 환경으로부터의 신규 지방 분해 효소 탐색 및 생화학적 특성 분석

Metagenomic libraries consisting of 81,100 (Edison Seamount), 80,050 (intertidal flat), 60,132 (Arctic), and 6912 (Upo wetland) clones were constructed using high molecular weight DNA samples isolated from three marine sediments and soil sample. To screen esterase/lipase-producing clones, the fosmid or cosmid clones were plated onto LB agar plates containing 1% tributyrin (TBN). Consequently, 18 positive clones (designated as pFosEM3L1, pFosEM3L2, pFosEM3L3, pFosEM3L4, pFosEM3L6, pFosEM3L7, pFosKT1, pFosKT3, pFosKT4, pFosKT7, pFosKT9, pFosAT1, pFosAT3, pFosAT5, pFosAT6, pFosAT7, pFosAT11, and pCosU1) were obtained by the appearance of clear zones around the colonies. The sequence analysis revealed that those clones contained open reading frames, showing 30-68% amino acid identity with putative lipolytic enzymes in the public database. Based on the phylogenetic analysis with previously characterized lipase/esterases, the enzymes were assigned to various families such as Family I (EM3L7), Family IV (EstKT4, EstKT7, EstKT9, EstAT1, EstAT5, EstAT7, and EstAT11), and Family V (EM3L1, EM3L3, and EM3L6), EstD2 group (EM3L2), Feruloyl esterase group (FeKT1) or Patatin-like protein group (PlAT6). EstKT4, EstKT7, and EstKT9 belonging to Family IV seemed encode distinct members in the family, forming a new subfamily in the Family IV of bacterial lipolytic enzymes. Of particular, 3 enzymes (EM3L4, EstKT3, and EstAT3) were assigned to three new groups that have never been described, and as discussed in the later section of abstract, EstU1 isolated from Upo swamp sample was assigned to Family VIII. In an attempt to express the esterase/lipase genes in E. coli, problems with solubility were encountered. By employing a combination of approaches such as removing the hydrophobic region in the N-terminus, co-expression of chaperone genes, and low temperature induction, 14 lipolytic genes were expressed as soluble form, and the recombinant proteins were purified to homogeneity by metal chelating affinity chromatography, followed by biochemical characterization. The optimum activities of the purified enzymes were determined in the temperature range of 20-45 °C and the cold-active profile that more than half of maxium activity remained even at 4 °C could be observed for seven enzymes. While 14 enzymes showed esterase activity toward short-chain fatty acid esters (C2-C10), EM3L4 showed lipase activity by hydrolyzing long-chain fatty acid esters (C16-C18), implicating that the probability of getting a true lipase is very low by applying this approach. EstKT4, EstKT7, and EstKT9 belonging to new subfamily displayed significant salt tolerance that over 50% of the maximum activity remained in the presence of 3 M NaCl (or KCl). Among 14 purified enzymes tested in this study, EstAT1 and EstAT11could hydrolyze racemic ofloxacin esters, and further EstAT11 hydrolyzed preferentially (S)-racemic ofloxacin butyl ester with an enantiomeric excess (eep) value of 70.3%. EstU1 classified as a member of Family VIII was investigated further since the sequence analysis of the clone revealed the presence of an open reading frame (estU1) encoding a polypeptide of 426 amino acids, retaining a S-X-X-K motif that is conserved in class C β-lactamases and Family VIII carboxylesterases. The relationship between the two families was suspected, but never been proven. To address the issue, estU1 gene was overexpressed in E. coli, and the purified recombinant protein (EstU1) was further characterized. EstU1 showed esterase activity toward various chromogenic p-nitrophenyl esters. In addition, it exhibited hydrolytic activity toward nitrocefin, leading us to investigate whether EstU1 could hydrolyze β-lactam antibiotics. EstU1 was able to hydrolyze first-generation β-lactam antibiotics, such as cephalosporins, cephaloridine, cephalothin and cefazolin. In a kinetic study, EstU1 showed a similar range of substrate affinity for both p-nitrophenyl butyrate and first-generation cephalosporins, while the turnover efficiency for the latter was much lower. The structure of EstU1 adopts a two-domain structure composed of a small helical domain including two β-sheets and a mixed α/β domain such as the structure of class C β-lactamases and penicillin-binding proteins (PBSs). The overall structure of EstU1 was also homologous to those of EstB carboxylesterase, R61 DD-peptidase and AmpC β-lactamase. Through structural-based phylogenetic analysis of EstU1 with DD-peptidases and β-lactamases, this result showed that the serine β-lactamases and the carboxylesterases including EstU1 are sister taxa and that the divergence of the DD-peptidase predated the divergence of the serine β-lactamases and the carboxylesterases Accordingly, the lipolytic proteins obtained by metagenomic libraries in this study revealed novel enzymes in terms of the primary sequences, the activity profiles and substrate spectra. These enzymes might be useful in biotechnological application such as organic synthesis and industrial processes.Docto

cross-layer design and multi-carrier system optimization

학위논문(석사) - 한국과학기술원 : 전기및전자공학전공, 2008.2, [ iv, 63 p. ]In this thesis, we provide a resource management framework for multi-hop multi-carrier systems. First, we deal with a cross layer design issue in relay-enhanced MCN (multi-hop cellular network). Under per-flow queueing scenario, we develop a cross layer control algorithm comprised of 1)flow control, 2)link scheduling and 3)resource allocation. The performance analysis proves that the derived cross layer control algorithm achieves arbitrarily close long-term optimal utility while guaranteeing the stability of the queueing system. After then, our focus moved onto the resource allocation problem in multi-hop multi-carrier systems, which will replace the resource allocation part of the cross layer control algorithm. By considering prohibitive complexity of the combinatorial problem, we propose a stepwise approach comprised of 1) STEP-1 FSA (fast subcarrier allocation) and 2) STEP-2 JSPA (joint subcarrier and power allocation). The STEP-1 FSA itself is one finished computationally efficient subcarrier allocation algorithm with equal power level on each subcarrier. In STEP-2 JSPA, each transmitting node performs joint subcarrier and power allocation for the given set of subcarriers to its outgoing links. By incorporating STEP-2 JSPA with STEP-1 FSA, much better and optimized performance can be achieved especially for the broadband systems.한국과학기술원 : 전기및전자공학전공

Screening of biocatalysis from metagenomic libraries of marine sediments

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Studies on the physiological function and biochemical properties of the frhAGB-encoding hydrogenase from a non-methanogenic hyperthermophilic archaeon

The F420-reducing hydrogenase has been known as a key enzyme in methanogenesis. Its homologs identified in non-methanogenic hyperthermophilic archaea were distinguished from those of most methanogens with respect to the phylogenetic analysis of the α and β subunits, organization of frhAGB genes, and conservation of F420-coordinating residues in the β subunits. The trimeric enzyme complex was purified from T. onnurineus NA1 and exhibited catalytic activity toward the electron acceptors such as viologens and flavins but not the deazaflavin coenzyme F420. The phenotypic changes associated with deletion and overexpression of frhAGB genes were investigated in T. onnurineus NA1. The deletion and overexpression of those genes enhanced growth on the CO- and formate-containing media, respectively. Transcriptional and translational levels of several hydrogenase genes were affected by frhAGB deletion, leading to the change in H2 productivity. The correlation between frhAGB-encoding hydrogenase and other hydrogenases will be discussed.s of the α and β subunits, organization of frhAGB genes, and conservation of F420-coordinating residues in the β subunits. The trimeric enzyme complex was purified from T. onnurineus NA1 and exhibited catalytic activity toward the electron acceptors such as viologens and flavins but not the deazaflavin coenzyme F420. The phenotypic changes associated with deletion and overexpression of frhAGB genes were investigated in T. onnurineus NA1. The deletion and overexpression of those genes enhanced growth on the CO- and formate-containing media, respectively. Transcriptional and translational levels of several hydrogenase genes were affected by frhAGB deletion, leading to the change in H2 productivity. The correlation between frhAGB-encoding hydrogenase and other hydrogenases will be discussed.1

Construction of metagenomic libraries from Edison seamount sediments and screening of metabolic activities

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