머신러닝을 이용한 부정형 필지의 유형화

홍성조,이윤서 대한건축학회 2022 대한건축학회논문집 Vol.38 No.3

The shape of land parcels greatly affects land value, the density of buildings, and the shape of a building. Although the Korean system classifies parcel shapes into 6 types, there are irregularly shaped land parcels that cannot be classified. Irregular shaped land parcels impose many restrictions on the arrangement and form of buildings, and these restrictions are even more severe with small parcels. Until now, studies on the shape of parcels have been conducted, but studies on irregularly shaped land parcels have been insufficient. Therefore, this study aims to typify irregular shaped land parcels that are difficult for humans to distinguish by applying machine learning methodology and to identify the characteristics of each type. The subject of this study is irregular shaped land parcels in the class-II general residential areas of Seoul; there were 500 sample parcels extracted and used for analysis. Irregular shaped land parcels were typified using K-means clustering, which is a representative method of unsupervised learning to solve classification problems. Afterwards, the values of Shape Index (SI), STandard Index (STI), and With-depth Ratio (WR), which are indices related to parcel shape, were compared by type. Upon analysis, the types of irregular parcels could be divided into avocado type, potato type, corner type, bell type, stick type, and L-shaped type. The stick type and L-shaped type reflected small SI values. The avocado type, corner type, and L-shaped type revealed small STI values. Lastly, the WR value was substantial for the stick type and L-shaped type. 필지의 형태는 경제적 가치, 건물의 밀도, 건물의 형태 등에 큰 영향을 미친다. 국내 제도에서는 필지의 형태를 6가지로 분류하고 있으나, 여기에는 구분하지 못한 부정형 필지가 존재한다. 부정형 필지는 토지의 건축물의 배치와 형태에 많은 제약을 가하며, 이 같은 제약은 소형필지인 경우에는 더욱 심하다. 그동안 필지의 형태에 대한 연구가 이루어져 왔으나, 부정형 필지에 대한 연구는 매우 부족하다. 이에 본 연구는 사람이 구분하기 어려운 부정형 필지를 대상으로, 머신러닝 방법론을 적용하여 유형화고자 하고 유형별 특징을 확인하는 것을 목적으로 한다. 본 연구의 대상은 서울시 2종일반주거지역의 부정형필지이며, 500개의 표본을 추출하여 분석에 활용하였다. 분류문제를 해결하는 비지도학습의 대표적인 방법인 K-mean 클러스터링을 이용하여 부정형 필지를 유형화하였다. 이후 유형별로 필지 형상과 관련한 지수인 SI, STI, WR의 값을 비교하였다. 분석결과는 다음과 같다. 첫째, 부정형 필지의 유형은 아보카도형, 감자형, 모서리형, 종형, 막대기형, L형으로 나누어졌다. 둘째, 막대형과 L형은 SI 값이 작게 나타났다. 셋째, STI는 아보카도형, 모서리형, L형이 작게 나타났다. 셋째, 막대형과 L형은 WR값이 크게 나타났다.

시스템분석분야 교육안

홍성조 대한산업공학회 2006 대한산업공학회 추계학술대회논문집 Vol.2006 No.11

공학교육의 현장 Part 1 우수 공학교육혁신센터 소개 : 동국대학교 공학교육혁신센터 -미래산업을 주도할 글로벌 융합형 창의인재 양성

홍성조 한국공학교육학회(구 한국공학교육기술학회) 2015 공학교육동향 Vol.22 No.3

산업공학프로그램의 평가체제 구축 및 운영

홍성조,조성구,이종태,조암,권영식,박춘엽,박준영 동국대학교 교육연구원 2000 교육문제연구 Vol.15 No.-

송과체 부위 종양 20례에 대한 임상 분석

홍성조,신형식,이민성,문재곤,김윤모 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.8

A retrospective analysis was made of 20 patients with pineal region tumors who were treated at the Department of Neurosurgery, Capital Armed Forces General Hospital between May of 1987 and March of 1990. We performed ventriculo-peritoneal shunt in 17 patients with obstructive hydrocephalus. Tissue diagnosis was obtained in 7 patients before irradiation and 13 patients underwent irradiation without histological diagnosis. Among 7 biopsy-proven cases, 5 were germinoma, one was mixed germ cell tumor and another one was astrocytoma. The response to irradiation and tumor marker study revealed that 13 patients who did not have tissue diagnosis seemed to be germinomatous non-germinomatous germ cell tumors and endodermal sinus tumor. So, the following results were obtained. 1) The patients were all young males. 2) The main presenting symptoms and signs were headache, vomiting and papilledema. 3) The tumors were mainly presented as a round well-enhancing masses with calcification. 4) Based on the classification of pineal tumor, germinoma was predominant tumor type. 5) The extrapineal metastasis was found in 5 cases(25.0%). 6) The tumor marker (α-FP or HCG) was positive in 5 cases(25.0%). 7) Germinoma showed excellent prognosis after the irradiation.

랜덤서비스를 갖는 비축출형 우선 순위 대기행렬시스템의 대기시간 분석

홍성조 동국대학교 산업기술연구원 1999 산업기술논문집 Vol.14 No.-

본 연구는 단일 서버에 의해 서비스되고 있는 시스템에 복수개의 서로 다른 우선권을 가진 메시지가 각각 복합포아송과정에 따라 도착하고, 서버는 우선 순위에 따라, 그리고 같은 우선 순위를 가진 메시지에 대해서는 랜덤한 순서로 서비스하며, 낮은 우선 순위를 가진 메시지의 서비스 도중에 보다 높은 우선 순위를 가진 메시지가 도착하면 비축출휴가를 가질 수 있다. 이와 같은 대기행렬시스템에 대하여, 임의의 메시지가 도착하였을 때 서비스기준에 따라 서비스한다. 또한 서버는 대기중인 메시지가 없을 경우 복수의 때의 시스템의 상태에 다른 조건부 대기시간을 구하고, PASTA성질을 이용하여 임의의 시점에서 임의의 메시지의 대기시간 분포를 라플라스-스틸체스변환 형태로 구하고, 대기시간에 대한 1차, 2차 모멘트를 구한다. We consider a nonpreemptive priority queue with server vacations and random order of service. Each message belongs to one of several priority classes, and the messages of each class arrive at the queue in a compounded Poisson process. As soon as the system becomes empty, the server leaves the system for a vacation. If the server finds at least one message when he returns from the vacation, the server immediately begins to serve the messages. If not, he leaves for another vacation. Messages are preferentially served in the order of priority, and for each priority in the order or random. By considering the conditional waiting times given the states of the system when an arbitrary message arrives, we derive the Laplace-Stieltjes transforms and explicitly obtain the first two moments of the waiting time distribution. Based on this result, we plot the numerical values of the mean and the coefficient of variation of the waiting.

사회연결망 분석을 이용한 충북지역의 인구이동 특성 분석 : - 세종시 출범 전후의 비교를 중심으로 -

홍성조 한국교통대학교 2017 한국교통대학교 논문집 Vol.52 No.-

The aim of this study is to analyze migration patterns in Chungbuk region through social network analysis. This study used raw data of 2011 & 2016 migration statistics to compare migration pattern before and after the construction of the Sejong city. We extract 266,698(2011: 131,887 / 2016: 134,811) moving cases which are moving into Chungbuk or moving out from Chungbuk. And we conducted social network analysis. The results may be summarized as follows. First, Population exchange with outside areas except for Sejong City in 2016 decreased from 2011. Second, since the start of Sejong city, the population movement pattern of Cheongju City, which has the largest population movements in Chungbuk region, has changed from inflow to outflow. Third, in 2016, the centrality of Cheongju, Chungju and Jecheon decreased compared to 2011, and the centrality of Sejong rose. Fourth, the inflow centrality of Jincheon and Eumseong are increasing and the outflow centrality decreased. Fifth, Cheongju and Chungju are the centers of migration in Chungbuk area.

다세대·다가구주택 밀집지역의 도시조직에 관한 연구

홍성조 한국교통대학교 2014 한국교통대학교 논문집 Vol.49 No.-

Despite the importance of multi-family houses(Dasaedae·Dagagoo), there is a lack of studies on urban fabric of areas with concentrated multi-family houses. Therefore, purpose of this study is to classify types of blocks & lots in areas with concentrated multi-family houses by in-depth analysis of spatial structure. To achieve this we selected 6 areas that multi-family houses contains more than 75% of total residences in area. And we built data on lots and blocks in these areas. The results of this analysis are as follows. There are 10 types of block in the areas. 2 or 4 row deep blocks are common, and 4 row deep blocks generally have 40~55m depth, and 2 row deep blocks generally have 20~35m depth. 4 row deep blocks have under 4m width dead-end alleys or loop shaped alleys to serve middle lots in block. There are 12 types of lots in the areas. Average area of lots in the areas is bigger than whole average area of Seoul. Slenderness ratio of lots in object areas is 1.67 which is bigger than general slenderness ratio of lots in low-rise residential areas in seoul

우선권이 있는 복수 계층 대기행렬시스템의 대기 시간의 분석

홍성조 동국대학교 산업기술연구원 1996 산업기술논문집 Vol.7 No.-

복수 계층을 가지고 단일 서어버에 의해 제한서비스 규칙 혹은 게이트서비스 규칙에 따라 서비스되는 대기행렬시스템에 있어서 고객의 평균 대기 시간을 구하는 새로운 방법을 제시하였다. 즉, 시스템의 상태와 대기 시간에 관련된 비용함수를 정의하고, 일반적인 바쁜 기간 분석, 리틀의 공식 및 PASTA성질을 이용하여 정상 상태에 있어서의 평균 대기 시간을 구할 수 있는 연립방적식을 유도하였다. 또한 이를 행렬의 형태로 나타내어 실제의 계산 알고리즘을 쉽게 구축할 수 있게 하였다. We investigate a multi-class priority queue with gated-limited service disciplines, and propose a new approach to the analysis of waiting times of customers. We formulate mean waiting times as cost functions on the state of the system. We first consider the system at an arbitrary state to obtain explicit formulae for the mean waiting times. Then we derive their steady state values using the PASTA(Poisson Arrivals See Time Averages) property and Little's formula.

Hybrid 가드채널이 있는 이동통신시스템의 성능 평가

홍성조,최진영 한국산업경영시스템학회 2006 한국산업경영시스템학회지 Vol.29 No.4

We analyze a voice/data integrated traffic model of the cellular mobile communication system with hybrid guard channels for voice and handoff calls. In a multi-service integrated wireless environment, quality of service guarantee is crucial for smooth transportation of real time information. Real time voice traffic requires a guaranteed upper bounded on both delay and packet error rate, whereas data traffic does not. Voice traffic has high transmission priority over data packets. Thus one of the important problems is the design of admission control schemes which can efficiently accommodate the differential quality of service requirements. In this paper, a hybrid guard channel scheme is considered in which arriving calls are assigned channels as long as the number of busy channels in the cell is below a predetermined first threshold. When the number of busy channels reaches the first threshold, new originating data calls are queued in the infinite data buffer. Then reaches second threshold, only handoff calls are assigned the remaining channels and new originating voice calls are blocked. We evaluate the system by a two-dimensional Markov chain approach and generating function method and obtain performance measures included blocking probability and forced termination probability.