Thermal Design and Numerical Prediction of Heat Transfer for Hybrid Heat Exchanger

The aim of the present study to develop the design program of a hybrid heat exchanger using the method. The design program is developed for the design to use easily with the help of GUI, menu program and dialog boxes. The concept of hybrid heat exchanger is to adopt the merits of both shell and tube heat exchanger and plate heat exchanger. The plate of hybrid heat exchanger is pressed in the shape of elliptical dimples. The correlations of heat transfer and pressure drop for elliptical dimples are not published. In the present study, the characteristics of the heat transfer and the fluid flow over the dimpled plate are predicted by using the Fluent 6.2. A grid system is got by ICEM-CFD using output file parasolid of 3D modelling of Unigraphics.Abstract 사용기호 표목차 그림목차 제 1 장 서 론 1.1 연구 배경 1 1.2 연구 목적 4 제 2 장 하이브리드 열교환기 2.1 하이브리드 열교환기의 구성요소 5 2.2 전열판 형상 6 제 3 장 하이브리드 열교환기 설계 3.1 E-NTU법 10 3.2 직교류열교환기 설계 기본식 13 3.3 직교류열교환기의 레이팅과 사이징 15 3.4 총괄열전달계수 17 3.5 프로그램의 구성과 기능 18 제 4 장 수치해석 4.1 지배 방정식 23 4.2 이산화방정식 26 4.3 격자계 28 4.4 Hybrid 판형내 유동 32 4.5 Hybrid 열전달 특성 33 제 5장 결론 43 참고문헌 4

Local Port Development Strategy for Ulsan New Port(Focused on local shippers needs)

The port of Busan and Gwangyang are hub ports of South Korea which are necessary to restructure their development policy. To measure development scale of a container terminal, various features must be considered. For example, complementary role of ports has a great ripple effect on local economy and employment. Ulsan, the largest industrial city of South Korea plays an important role in the national economy and the port of Ulsan as a gateway of the city also takes a critical part of the region. Furthermore, Ulsan Port is located in the vicinity Busan port and with its continuous needs for shipping from the industrial part of the city, the port can meet requirements to become a successful port. Besides, it is required to strengthen the network between local ports and hub ports and establish the competitive characteristics of export and production route from and to the hinterland. Especially, it is important to develop hinterland by the right positioning of local ports to ensure competitive cost and needs regarding co-opetition among local ports. Hereby, this study reviews existing quantitative analysis and compare the results and try to take advantage of each studies to enhance the new port development strategy. Furthermore, case analysis which can be applied to the development of Ulsan new port and logistic simulation is also reviewed in this thesis.제1장 서론 1.1 연구의 배경 및 목적 1 1.2 연구방법 및 범위 2 1.3 선행연구 고찰 2 제2장 울산항 경제 환경 현황 2.1 울산경제 현황 4 2.2 울산항 시설현황 9 2.3 울산항 항만운영 현황 14 제3장 울산항 물동량 분석 3.1 물동량 예측치 비교분석 18 3.2 울산항 물동량 특성분석 24 3.3 글로벌 및 국내 배후지 지수 36 제4장 울산신항 인근 경쟁 항만 비교분석 4.1 포항 영일신항 현황 39 4.2 경쟁 항만의 마케팅 전략 비교 42 4.3 항만 시설 사용료 비교 47 4.4 인근 경쟁항만 컨테이너 운송요율 비교 52 4.5 부산항과의 울산지역 수출 컨테이너 화물 운임 비교 59 제5장 울산신항 발전방향 5.1 항만 마케팅 및 포트세일즈 강화 61 5.2 울산신항 차별화 전략 65 제6장 결론 6.1 결론 68 6.2 연구의 한계 및 향후 연구방향 69 참고문

全地球 海洋 混合層에서의 慣性 海流 및 慣性 에너지 平衡

학위논문(박사)--서울대학교 대학원 :지구환경과학부,2007.Docto

PHOTOSENSITIVE THERMOSETTING COMPOSITION CONTAINING COPOLYMER SUBSTITUTED PHOTOSENSITIVE THERMOSETTING AGENT

본 발명은 감광성 열경화제로 치환된 공중합성 단량체를 포함하는 감광성 열경화성 조성물에 관한 것으로, 이 조성물은 (ⅰ) UV 조사에 의해 산이나 염기를 발생하는 단량체, (ⅱ) 공중합성 라디칼 광개시제; (ⅲ) 이온성 광중합용 단량체, 에폭시기를 갖는 올리고머 또는 이들의 혼합물; (ⅳ) 라디칼 광중합용 에틸렌계 불포화 화합물; (ⅴ) 증감제; 및, (ⅵ) 희석제를 구성성분으로 하고 있다. 본 발명의 감광성 열경화성 조성물은 포토레지스트 패턴을 형성하는 공정 중, 레지스트피막에 남아있는 용매를 제거하기 위해 실시하는 열건조 공정에서 에폭시의 경화제가 열경화 반응을 일으키지 않고 있다가, UV조사에 의하여 산성기와 염기성기를 발생하고 이어 열경화 반응을 일으켜서 포토레지스트의 현상성을 향상시킨다

Resonance frequency analysis validation on the initial stability of orthodontic mini implant

치의학과/박사[한글] 성견 2마리의 상악과 하악의 치조정과 협측골에 교정용 미니 임플란트 52개를 식립하고 250mg-300mg의 교정력을 가한 후 식립토오크를 측정하고 6주동안 1주 간격으로 Periotest, RFA를 측정하였다. 교정용 미니 임플란트의 안정성 평가 방법 중 RFA와 다른 측정방법들간의 상관성을 비교하고 교정용 미니 임플란트의 성공군과 탈락군의 차이를 분석하여 교정용 미니 임플란트의 안정성에 대한 RFA의 신뢰성을 평가하였다. [영문]ope

Semi-longitudinal study on vertical growth pattern of children aged 7 to 16 following ratio of anterior facial h

치의학과/석사[한글] 정상 또는 비정상적인 안모를 가진 사람들의 측모두부방사선 사진에 대한 연구는 많은 연구자들에 의해 연구되어온 과제중의 하나이다. 그러나, 두개안면부위의 정상계측치에 관한 연구는 인종, 성별, 지역등의 영향을 받아 상호간에 많은 변이를 보이며 특히 골격형태의 유형에 따라서도 많은 차이를 보였다. 그러므로, 각 개인에 있어서 다양한 형태로 나타나는 성장양상을 분류, 유형화하여 정상적 안모에 대한 기준을 설정하는 것은 어렵고도 중요한 일이라 할수있다. 그래서 선학들은 각 평가방법에 의해 안모유형을 구분하고 이들의 성장양상을 분석하였다. 본 연구는 골격성 단안모군과 골격성 장안모군의 성장 양상을 비교하기 위하여 분류기준을 총전방안면고경에 대한 전방하안면고경의 비로하여, 7-16세 남녀 아동을 대상으로 준종단적으로 연구하여 다음과 같은 결과를 얻었다. 1. 총전방안면고경의 성장은 사춘기 이전에는 장안모군과 단안모군사이에 차이를 보이지 않았으나 11세 이후부터 남, 여 모두 두 군 사이에서 유의성 있는 차이를 보였다. 2. 총전방 안면고경의 성장은 사춘기 이전에는 같은 안모유형에서 남, 여의 차이를 보이지 않았으나 장안모군은 15세 이후부터 단안모군은 14세 이후부터 남, 여의 유의성 있는 차이를 보였다. 3. 후방안면고경과 하악지고경은 남, 여 모두 장안모군과 단안모군사이에서 차이가 없었다. [영문] Lateral cephalometric study on normal or abnormal facial type is one of the subject has been studied by many investigator. But, growth and development of craniofacial region is influenced by race, sex and sereveral factor, specially skeletal pattern. and individual growth pattern is very variable. Therefore, It is important to standize normal facial type and to compare the normal and abnormal facial type. The purpose of this study was to compare between vertical growth pattern of skeletal long face and that of skeletal short face following ratio of anterior facial height. We evaluated lateral cephalometric X-ray films of 289 Korean boys and girls aged from 7 to 16 by semi-longitudinal study. As a result of this study, following were observed. 1. Total anterior facial height was not significant difference between long face and short face before pubertal stage on both male and female. But, there was significant difference between different facial type after 11 age on both male and female. 2. Total anterior facial height was not significant difference between male and female before pubertal stage on both two group. but, long face was significant difference after 15 age between male and female, short face was after 14 age. 3. Posterior facial height and ramal height were no significant difference between long face and short face on both male and female.restrictio

고려 초 지방제도 개편과 주현속현제도의 성립

After the dynastic foundation, the Goryeo government inherited the late Silla dynastys the local governing System based on hierarchic counties called Juh-Gun-Hyeon system(州郡縣制度), but it partially reorganized the local governance units according to political and military needs. The Goryeo governments demarcation of country units was performed in 941(King Taejos 23th year) on the basis of local governing Systems reforms accumulated since the dynastic foundation. Establishment of the 12 Mok(牧) counties, dispatch of the local management to the 12 Mok counties and launch of the new local functionary system(鄕史制度), all carried out in 983(king Seongjongs 2nd year), were significant foundations on later consecutive reorganizations of local governing System. The 10Do(道) system and Juhhyeon system(州縣制度)s launch of 995(King Seongjongs 14th year) were performed for the purpose of attaining centralized local governing System the Goryeo dynasty had aimed for since its foundation. King Hyeonjong made the new system named Juhhyeon-Sokhyeon system(主縣屬縣制度) in 1018. This system revised local government System based on Juhhyeon(主縣, control country) and Sokhyeon(屬縣, subordinate country) structure. Those two local governenmt Systems considerably succeeded to the late Sillas experiences on managing local government system. Especially, the two systems revised control and subordinate relations formed between counties since the late Silla period and the Goryeo government developed a unique local governing System through dispatching the local management on control counties. The Juhhyeon-Sokhyeon system(主縣屬縣制度) of 1018 organized the Juhhyeon-Sokhyeon unit((主縣屬縣單位) and dispatched the local management from the central government to the Juhhyeon(主縣, control country). It was the most important to decide which country should be a Juhhyeon(主縣, control country) when the government revised the control and subordinate relations between counties in the process of the 1018 Juhhyeon-Sokhyeon system(主縣屬縣制度)s establishment. Most of control counties designated by the central government in the 1018 reform had played the functions of main local place since the late Silla period, and some other control counties were the places which became militarily key strongholds after the foundation of Goryeo dynasty.이 연구는 숙명여자대학교 2015년 교내연구비 지원에 의해 수행되었음

Study on stress response-related WDL and OsPUB15 in rice

DoctorGlobal climate changes cause abiotic stresses, which are the greatest threat to cereal production and security in worldwide. Especially, drought accelerates the salinity of irrigated land, continues to expand desertification. Better knowledge of the molecular and genetic bases of the mechanisms promoting tolerance to abiotic stress will help in improving a plant's capacity to adapt to a limited environment, which in turn will enable an increase in the current production levels. Here, I report characteration of two rice mutants, which showed altered response to abiotic stresses. One, named wilted dwarf and lethal 1 (wdl1), was dwarfed and died at the seedling stage because of an increased rate of water loss. This mutant had smaller stomatal and pavement cells, suggesting that WDL1 affects epidermal cell differentiation. T-DNA was inserted into a gene encoding a protein within the GDSL lipase superfamily. SEM analysis showed that the leaves of this mutant had a disorganized crystal wax layer. Cross-sectional analysis revealed loose packing of the cuticle and irregular thickness of the cell wall. Detailed analysis of the epicuticular wax showed no significant changes in the total amount and amounts of each monomer, and in the levels of lipid polymers, including cutin and other covalently bound lipids, attached to the cell wall. These results indicate that WDL1 is involved in cutin organization, affecting depolymerizable components. The other mutant was hypersensitive to oxidizing stress, and showed severe growth retardation and a seedling-lethal phenotype. This mutant gene, Oryza sativa Plant U-Box15 (OsPUB15), encoded a protein of the Class II PUB family. Self-ubiquitination assays showed that bacterially expressed MBP-OsPUB15 had E3 ubiquitin ligase activity. Mutant seeds did not produce primary roots, and their shoot development was significantly delayed. Transgenic plants expressing the OsPUB15 antisense transcript phenocopied these mutant characters. The abnormal phenotypes were partially rescued by two antioxidants, catechin and ascorbic acid. Germinating seeds in the dark also recovered the rootless defect. The levels of H2O2 and oxidized proteins were higher in the knockout mutant than in the wild type. OsPUB15 transcript levels increased upon H2O2, salt, and drought stressesthe plants overexpressing the gene grew better than the wild type under high salinity. These results indicate that PUB15 is a regulator that reduces ROS stress and cell death

Mountains of Gaeseong(開城) recorded in gaeseong-eupjis(開城邑誌) of Joseon Dynasty

This paper is written to organize mountains of Gaeseong that are recorded in gaeseong-eupjis After organizing mountains that were recorded in 『Goryeosa (高麗史)』, 『Sejongsillok-jiriji (世宗實錄地理志)』, and 『Dongguk-yeojiseungnam (東國輿地勝覽)』, all of which were published in the early Joseon dynasty, I have confirmed that the publication of 『Dongguk-yeojiseungnam』 was the turning point in recording mountains of Gaeseong. In the remaining gaeseong-eupjis, there are 『Songdo-ji』(『松都誌』, 1648), 『Songdo-ji』(『松都誌』, 1782), 『Songdo-sokjji 松都續誌』, 『Junggyeong-Ji(中京誌)』, and 『Songgyeong-gwanggo(松京廣攷)』. Gaeseong-eupjis were re-edited every time Gaeseong-bu(開城府) underwent a regional expansion; each edition brought about by the regional expansions increased the number of mountains in the region to be recorded in gaeseong-eupjis. Also, in the gaeseong-eupjis that were compiled after 『Songdo-sokjji 松都續誌』, mountains that belong to Jangdan-bu(長湍府) as well as mountains that are located on the borders of Gaeseong-bu and Jangdan-bu are recorded. This is because Gaeseong People considered mountains of Jangdan as those of Gaeseong and as their field of activities. In gaeseong-eupjis, there are pictiorial maps named seongnae-do(城內圖) and pogwon-do(幅員圖). Seongnae-do is in 『Songdo-ji』(『松都誌』, 1782), 『Junggyeong-Ji(中京誌)』, and 『Songgyeong-gwanggo(松京廣攷)』 and the content is almost the same. This ds due to the fact that seongnae-do that was created when 『Songdo-ji』 was compiled was succeed in 『Junggyeong-Ji(中京誌)』, and 『Songgyeong-gwanggo(松京廣攷)』. The mumber of mountains recorded on pogwond-do in gaeseong-eupjis gradually increased as Gaeseong-bu expanded its regional boundaries and the regional expansion had to be reflected on the pictorial maps (i.e., Pogwon-do), However, some mountains recorded on pogwon-do in gaeseong-eupjis are different from those recorded in sancheon(山川) of gaseong-eupjis

(A) Study on the family community for sustainable aging society

학위논문(석사) - 한국과학기술원 : 미래전략대학원프로그램, 2021.2,[iii, 61 p. :]산업구조변화에 따른 도시로의 인구 과잉은 주택 수요와 주거 문제를 발생시켰다. 이에 따른 대안으로 공급된 공동주택은 핵가족 확산에 큰 영향을 미쳤다. 특히, 과거 농경사회부터 이어져 내려온 확대가족, 그중에서도 2·3세대 동거 가구를 감소시켰다. 또한, 핵가족 확산과 더불어 저출산, 고령화 현상은 우리가 풀어야 할 당면 과제이다. 한국은 산업화, 정보화라는 거대한 두 파고를 슬기롭게 대응함으로써 세계가 인정하는 압축성장을 이룩했다. 하지만, 급격한 산업구조변화로 인해 가족 내 지위 구도가 변화하였고, 이에 따른 가족 내 갈등은 심화되었다. 그런데도, 현대사회의 가족구조는 확대가족 원리가 여전히 작동하는 수정확대가족을 이루고 있음이 확인되었다. 따라서, 본 연구는 선행연구를 바탕으로 여성의 일·가정 양립에 따른 저출산 문제, 노인 인구 증가에 따른 부양문제에 집중하였고, 국내외의 사례를 검토하였다. 그 결과, 일본의 인근접주거 촉진 지원제도에 주목하였다. 본 제도는 자녀와 부모가 동거 또는 가까이 살도록 독려하는 제도로써, 자녀가 부모를 살핌으로써 노인 부양문제를 해결하고, 부모가 손자녀 양육을 도움으로써 손자녀 양육 문제를 해결하는 데 순기능이 있는 것으로 드러났다. 또한, 가족 간 인·근거를 통해 정주 인구 확보하여 지역 소멸을 예방하고, 인구 유입 기대에 따른 빈집 해결 효과가 있는 것으로 드러났다.한국과학기술원 :미래전략대학원프로그램