지형도(地形圖) 축척(縮尺)에 따르는 하천 수로망(水路網)과 본류(本流) 하천길이에 관한 Fractal Dimension

전민우,조원철,Jeon, Min Woo,Cho, Won Cheol 대한토목학회 1992 대한토목학회논문집 Vol.12 No.4

하천 수로망(水路網)의 수로길이와 본류(本流) 수로길이는 사용된 지형도(地形圖) 축척(縮尺)에 따라 각각 다른 값을 나타내며, 이와 같은 지형도상(地形圖上)의 수로길이는 Fractal로 간주할 수 있다. 수로망(水路網)의 하천길이와 본류(本流) 수로길이를 Horton 법칙을 적용함으로써 유역면적비(Ra)만의 함수로 나타내어, 수로망(水路網)의 하천길이에 관한 Fractal Dimension(D)와 본류(本流) 수로길이에 관한 Fractal Dimension(d)를 길이의 비(比)($R_L$)과 유역면적비(比)($R_a$)의 함수로 각각 유도하였다. 유도된 결과식을 금강수계내(錦江水系內) 산성(山城)유역의 수로망(水路網)에 적용하여 기(旣) 발표된 공식과 비교 검토하였으며, Fractal Dimension은 수로망(水路網)의 경우 지형도(地形圖) 축척(縮尺)이 클수록 2에 가까운 값을 나타낸 반면에, 본류(本流)수로의 경우는 1에 가까운 값을 나타내었다. 본 연구의 결과는 지형도(地形圖) 축척(縮尺)에 따르는 수로망(水路網)구성의 정량적(定量的) 분석에 도움이 되리라 생각된다. Total length of stream networks and main stream length vary with topographic map scales, and the stream length of drainage basin on topographic map can be viewed as a fractal. Total length of stream network and main stream length are represented as only stream area ratio($R_a$) based on Horton's laws, thereafter the fractal dimensions of stream network and main stream length are derived as a simple function of stream length($R_L$) and stream area ratios($R_a$) respectively. The derived equations of fractal dimension are applied to Sansung basin in Kum River and compared with the equations already existed. The stream network appeared as space filling with fractal dimension near 2 as map scale increases, while main stream length shows near 1. The results of this study are expected to be helpful in the quantitative analysis of drainage network composition with map scale.

개수로흐름 해석에서 운동량방정식의 특성

전민우,전종기,Jeon,Min-Woo,Jeon,Jong-Ki 한국방재학회 2008 한국방재학회논문집 Vol.8 No.3

본 연구는 운동량방정식을 이루는 각 항의 상대적 크기를 해석적 방법으로 비교분석하였다. 운동량방정식의 매개변수인 하상 경사와 조도계수를 유출영향인자로 하여 각항의 시간적 변화를 분석하였다. 국지가속도와 대류가속도항의 크기는 서로 상쇄되는 경향을 보이며, 중력항을 제외한 나머지항들의 첨두치 발생시각은 수문곡선 상승부의 변곡점 발생시각과 일치함을 알 수 있다. 각 항의 상대적 크기는 하도특성에 따라 변하며, 특히 완경사 하천과 조도계수가 큰 경우는 압력항을 무시할 수 없음을 알 수 있다. The relative magnitudes of the individual terms of the momentum equation are analyzed and compared by analytical methods. The temporal variations of each term are analyzed for the influence factors to runoff expressed by the parameters of the momentum equation, stream slopes and roughness coefficients. The magnitudes of local acceleration and convective acceleration offset each other. The peak time of each term except the gravity term coincides with inflection point of the hydrograph rising limb each other. The magnitudes of each term vary with the channel characteristics, especially when the roughness coefficients are dominant or for the mild stream slopes the pressure term can not be negligible.

합성단위도를 위한 Snyder방법의 개선

전민우(Jeon Min Woo) 대한토목학회 2003 대한토목학회논문집 B Vol.23 No.5B

문래동의 어버니티 재생을 위한 프로덕트디자인 제안에 관한 연구

전민우 ( Jeon Min Woo ) 한국기초조형학회 2020 한국기초조형학회 학술발표논문집 Vol.2020 No.1

강우분포형에 따르는 이동강우의 유출해석

전민우(Jeon Min Woo),한건연(Han Kyun Yeun),조용수(Cho Yong Soo),최규현(Choi Kyu Hyun) 대한토목학회 2004 대한토목학회 학술대회 Vol.2004 No.10

품새(태권도), 카타(가라데), 투로(우슈) 경기규정 비교를 통한 품새 경기규정 개선방향에 관한 연구

전민우(Jeon-Min, Woo),임신자(Sin-Ja, Lim),전익기(Ik-Ki, Jeon) 한국무예학회 2009 무예연구 Vol.3 No.2

본 연구는 태권도의 품새보다 앞서 국제종목에 진입한 우슈의 투로와 가라데의 카타 경기규정을 비교하고 품새가 다른 두 종목보다 미흡한 부분을 파악하여 경기규정의 개선방안에 대한 방향성을 제시하고자 하였다. Bereday(1964)의 4단계 비교방법을 수정, 활용하여 각 종목의 연맹에서 발간한 경기규정을 대상으로 경기방식, 심판관련요인, 채점기준으로 분류하고 분석과 비교를 실시하였다. 연구결과 품새가 카타나 투로보다 폭 넓게 연령층을 세분시켜 청소년부터 장년층까지 다양한 연령층의 참여가 가능하도록 실시하고 있었고 경기에서 실시하고 있는 품새, 카타, 투로의 종류는 카타가 84가지, 품새 13가지, 투로 12가지로 나타났다. 각 종목 별 채점 기준에서 나타난 결과는 품새는 각 품새별로 세부적인 채점 기준을 정하고 있으며, 카타는 전통적인 방식과 원칙을 강조하고 있다. 투로는 앞의 2가지 측면과 함께 창의적인 측면에 대한 요인을 경기규정으로 정하고 있는 것으로 나타났다. Taekwondo Pumsae(patterns) competition has played a positive role in improving various aspects of Taekwondo, such the chivalry feature, martial art feature, and every day life sport feature, shifting away from the focus on duels. As a result, a growing number of people are practicing Pumsae, and more than 10 Pumsae competitions have been held nationwide. Moreover, Pumsae was adopted as a new type of sports in Summer Universiade Competition, one of international competitions, and Pumsae is expected to become a formal sports as duel. However, the development of Pumsae competition have given rise to many problems. As problems arose from important factors of competition, such as the method for competition, umpire, criteria for scoring, etc, the situation is not favorable for Pumsae to become an official sport in international competitions. This study attempted to suggest the direction of improving the rule of match by comparing the Turo of Ushu and Kata of Karate, which were adopted as international sports and identifying the shortcomings of Pumsae compared to the aforesaid two different rules of match. By modifying and applying the 4 step method for comparison that had been created by Bereday(1964), three categories were classified, which were the 'method for competition', 'factors associated with umpire', and the 'criteria for scoring', as to the rule of match issued by the federation of each sport, and subsequently, the analyses and comparisons were conducted. The findings of the study indicated that Pumsae was practiced in a way that enabled people of various age groups, such as adolescents and middle-aged people, to participate as it was segmented more broadly than Kata or Turo, and it was found that Kata had 84 patterns, Pumsae 13 patterns, and Turo 12 patterns that were practiced in matches. Kata practiced both the 'optional type' which recognizes the patterns modified by the class of instructor and the 'compulsory pattern' that has to be demonstrated exactly according to the traditionally original type, and furthermore, the demonstration which applies the motions of type called "Breakdown Demonstration“ to the real fight was performed compulsorily in the group competition final match. Turo match was performed according to the rule by referring to the difficulty of each motion beforehand, such as Changsinnando. The motions of Pumsae are demonstrated according to the predefined rule. Turo allows music to be utilized, while Kana and Pumsae do not allow music to be used. In relation to the scoring, the performance of Pumsae is evaluated on the basis of 7-umpire or 5-umpire system with the scores being determined by deducting the scores according to the rule based on the accuracy(5 scores) and presentation(5 scores) and then calculating the average scores after excluding the highest score and lowest scores given by umpires. The scoring system of Kata is based on 3-umpire or 5-umpire system, and the winner is selected through the scores and blue-and-red flag system. In Turo, 10 umpires are grouped separately: Group A is composed of 10 umpires, and Group B is composed of 4 umpires. And Group C consists of 3 umpires. Group A evaluates the motion mass(5 scores) and Group B evaluates the level of presentation(3 scores). Meanwhile, Group C evaluates the level of difficulty to the player(2 scores). The scores of Group A are the scores that take the confirmed deduction in scores into account, and the scores of Group B are derived by deducting the grade scores of presentation(performance) level, which are given by two umpires, from scores deducted for the formation error of the remaining two umpires. The scores of Group C are derived by adding the scores, given by more than 2 umpires, for the motion difficulty and connection difficulty of player, and the final scores are calculated by adding and deducting scores for the Changsinnando of umpire to and from the total scores of Group A, Group B, and Group C. Turo is the only one tha

지형학적 인자에 의한 유역 저류상수의 결정

전민우 ( Min Woo Jeon ),조용수 ( Yong Soo Cho ),김훈 ( Hoon Kim ) 충북대학교 건설기술연구소 2005 建設技術論文集 Vol.24 No.1

Monte Carlo 기법에 의한 하천제방의 안정성 평가

전민우(Jeon Min Woo),김지성(Kim Ji Sung),한건연(Han Kun Yeun) 대한토목학회 2006 대한토목학회논문집 B Vol.26 No.5B

홍수범람 수위에 따른 제방의 안전은 홍수방지 시스템 구축에 있어서 매우 중요한 요소이다. 그러나, 기존의 확정론적인 방법을 통한 홍수위의 계산은 입력매개변수들이 내포한 불확실성을 반영할 수 없다. 본 연구의 목적은 Monte Carlo 기법을 활용한 부등류 해석에 의하여 설계홍수위 불확실도 계산방법의 개발에 있다. 제방의 신뢰도분석 모형에서, 본 연구에서는 Manning 조도계수, 설계유량, 하천의 단면좌표, 기점수위에 의한 홍수위의 불확실성을 고려하였으며, 정량화된 입력매개변수들의 변동성으로부터 하천홍수위의 변동성을 정량화하였다. 본 모형을 대구시를 관류하는 금호강 38.5 ㎞ 구간(95개 단면)에 적용하여, 각 단면에서 계산된 홍수위와 기설 제방고의 표고를 비교함으로써 월류 위험도를 분석하였다. 분석 결과, 기설 제방고와 비교하여 7개 단면에서 제방의 증고가 필요할 것으로 판단되었으며, 그 크기는 최소 1 ㎝에서 최대 56㎝로 계산되었다. 본 연구는 기존의 제방고 설계방법의 보완 및 홍수위험지도 제작, 홍수예측 시스템, 홍수피해완화 계획 설립 등에 활용될 수 있을 것으로 판단된다. The safety of levee that depends on the river flood elevation has been regarded as very important keys to build up various flood prevention systems. However, deterministic methods for computation of water surface profile cannot reflect the effect of possible inaccuracies in the input parameters. The purpose of this study is to develop a methodology of uncertainty computation of design flood level based on steady flow analysis and Monte Carlo simulation. This study addresses the uncertainty of water surface elevation by Manning's coefficients, design discharges, river cross sections and boundary condition. Monte Carlo simulation with the variations of these parameters is performed to quantify the variations of water surface elevations in a river. The proposed model has been applied to the Kumho-river. The reliability analysis was performed within 38.5 ㎞ (95 sections) reach considered the variations of the above-mentioned parameters. Overtopping risks were evaluated by comparing the elevations of the flood condition with the those of the levees. The results show that there is a necessity which will raise the levee elevation between 1 ㎝ and 56 ㎝ at 7 sections. The model can be used for preparing flood risk maps, flood forecasting systems and establishing flood disaster mitigation plans as well as complement of conventional levee design.

미호천유역 계획하폭 산정식의 결정

전민우 ( Min Woo Jeon ),임창우 ( Chang Woo Lim ) 충북대학교 건설기술연구소 2010 建設技術論文集 Vol.29 No.1

The decision of river width has aimed at flood control and good river conveyance. Furthermore the river width has been decided by practitioner`s subjective and emperical opinion. However, there is a need for more objective and thus quantitative decision method for decision of river width considering not only economical aspect but also social or environmental aspect. To determine the design river width in Miho stream basin, hydrologic and geographis characteristics, such as basin area, channel slope, stream length are investigated. The current equations of design width determination of small rivers are examined in this paper. The stream morphological characteristics of river basin has a close correlation with the hydrological and hydraulic characteristics of the basin. The design flood, basin area and channel slope of 23 medium rivers in Miho stream basin are collected. The design river width formulas are then determined by the least square method. Using the proposed method, It allows to prioritize various river width and make the optimal decision and this method can serve as a useful tool for river engineers in practice.

보청천 유역의 수리학적 특성

전민우 ( Min Woo Jeon ),조용수 ( Yong Soo Cho ) 충북대학교 건설기술연구소 2005 建設技術論文集 Vol.24 No.2