• Journal of information and communication convergence engineering
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• 제10권4호
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• pp.411-419
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• 2012

This paper proposes a semi-automatic image-based approach for 3-dimensional (3D) modeling of buildings along streets. Image-based urban 3D modeling techniques are typically based on the use of aerial and ground-level images. The aerial image of the relevant area is extracted from publically available sources in Google Maps by stitching together different patches of the map. Panoramic images are common for ground-level recording because they have advantages for 3D modeling. A panoramic video recorder is used in the proposed approach for recording sequences of ground-level spherical panoramic images. The proposed approach has two advantages. First, detected camera trajectories are more accurate and stable (compared to methods using multi-view planar images only) due to the use of spherical panoramic images. Second, we extract the texture of a facade of a building from a single panoramic image. Thus, there is no need to deal with color blending problems that typically occur when using overlapping textures.

• Journal of Communications and Networks
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• 제8권4호
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• pp.410-421
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• 2006

In this work, we propose an analytic framework for dimensioning the link capacity of broadband access networks which provide universal broadband access services to a diverse kind of customers such as patient and impatient customers. The proposed framework takes into account the flow-level quality of service (QoS) of a connection as well as the packet-level QoS, via which a simple and systematic provisioning and operation of the network are provided. To that purpose, we first discuss the necessity of flow-aware network dimensioning by reviewing the networking technologies of the current and future access network. Next, we propose an analytic model for dimensioning the link capacity for an access node of broadband convergence networks which takes into account both the flow and packet level QoS requirements. By carrying out extensive numerical experiment for the proposed model assuming typical parameters that represent real network environment, the validity of the proposed method is assessed.

• 소음진동
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• 제8권5호
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• pp.799-806
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• 1998

Noise and vibration due to railway traffic are major causes of environmental pollution in the city. In course of judging, assessing and coping with the problem, it becomes imperative to predict the vibration level induced by railway traffic passing through downtown in the city. The vibration due to railway traffic is transferred to the neighbouring buildings through the ground. In this study, as a method predicting vibration level of the buildings near railway, a vibration transfer formula is suggested. This formula is used to calculate vibration level occuring at the bottom of the neighbouring buildings, which are located at a certain distance from railway.

• 농촌지도와개발
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• 제3권1호
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• pp.83-93
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• 1996

This study examines the agricultural extension agents` satisfaction with their job and its related variables - personal characteristics, achievement motivation, and needs level. Based on die Job Descriptive Index, Brayfield-Rothe Index, and Porter Instrument, the survey was carried out on 127 agents. Results show 1) a significant difference in personal characteristics is found in position, farmer contact frequency, and service region applied for, but not in age, gender, scholastic ability, career, task, and another department contact frequency, 2) the achievement motivational level is related to job satisfaction, and 3) the needs level is not related to job satisfaction.

• 전자통신동향분석
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• 제35권6호
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• pp.107-118
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• 2020

The smart city agenda aims to solve various problems arising in cities and promote the welfare and happiness of citizens by utilizing the new technologies of the 4th Industrial Revolution. Smart city policies have been promoted at the national level, but until now, policy implementations have not been effective enough to fundamentally affect citizens. To realize a more realistic and practical smart city, it is necessary to examine the problems occurring in the city in depth and set the direction and tasks of the smart city accordingly. Therefore, this study specifies the issues and problems faced in 12 sectors, including manufacturing, logistics, medical care, and safety. Next, by referring to the existing literature, a future smart city integration model is proposed that can respond to these problems. That is, future smart cities should create detailed services with enhanced efficiency, sustainability, strong risk management, safety, and satisfaction as the main goals. This study is meaningful in that it suggests a vision and tasks of smart cities that can solve problems in various sectors in a form that can be felt by the citizens.

• 한국산학기술학회논문지
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• 제17권2호
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• pp.351-360
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• 2016

본 연구는 서울시를 대상으로 개인의 행복수준에 영향을 미칠 것으로 예상되는 도시환경 특성요소를 추출하고 실제 주민들의 행복수준에 영향을 미치는 요인을 실증적으로 분석함으로써 보다 행복한 도시환경을 조성하기 위한 도시정책과 도시계획 방향을 제시하는데 목적이 있다. 개인의 행복수준에 영향을 미치는 도시환경 요소를 구성하기 위해 도시환경 특성(물리적 환경, 자연적 환경, 사회적 환경) 변수와 개인 특성(개인의 사회 경제적 특성) 변수를 구성하여 분석하였다. 본 연구의 주요 분석결과는 다음과 같다. 첫째, 도시의 물리적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과 인구밀도가 낮고 보행환경만족도가 높을수록 개인의 행복수준이 높아지는 것으로 나타났다. 둘째, 도시의 자연적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과 1인당 공원면적이 넓고 녹지만족도가 높을수록 개인의 행복수준이 높아지는 것으로 나타났다. 셋째, 도시의 사회적 환경이 개인의 행복수준에 미치는 영향을 분석한 결과, 사회적 신뢰가 행복수준에 영향을 미치는 것으로 나타났다.

• 한국조경학회지
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• 제35권1호
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• pp.59-68
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• 2007

This article statistically analyzed contributive levels of district image based on an effect and a similarity index through the evaluation of citizens and suggested the efficient management system of a city image according to the results. For this study, Busan City was selected as a case city by the preceding literature and was investigated concerning district image and city image through a questionnaire. The new evaluation method for analysis of a city image was presented in this process. The results of this research are as follows: 1. Busan City has a substantial positive and culturally unique image, and each of its districts have other image characteristics. for example, the CBD district has a positive image, and the sea shore district has a busy and prosperous image, but the backward sea shore district has an image of stagnancy. 2. The image of Yeonje-gu has the largest effect on the image of Busan. Next in influence are Jung-gu, Saha-gu, Suyoung-gu, respectively. The effect index is closely connected with the variance of evaluative adjectives. 3. Busanjin-gu and Haeundae-gu have similar images to Busan City. Next in similarity are Nam-gu, Jung-gu, Youngdo-gu, Suyoung-gu, respectively. The similarity index is closely connected with the correlation of evaluative adjectives. Busan City and its districts can establish their image strategies with the above analyzed results. This study is meaningful in that a statistical evaluative method was proposed. With continued follow-up research, this study may serve as a systematic and logical model to improve the urban landscape and image.

• Journal of Preventive Medicine and Public Health
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• 제28권1호
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• pp.123-139
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• 1995

This study investigated the stress of community residents in Kwang-Ju and Chonnam areas by using the General Health questionnaire(GHQ-60) as a instrument of stress measurement. The number of subjects were 445 residents who lived in three areas(large city, middle city, and rural area) and they were individually interviewed in March, 1994. The results of study showed that the degrees of stress measured by GHQ-60 were statistically significant in the residents' area, age, sex variables: (a) the residents in middle city among three areas had the highest level of stress; (b) the residents who were more than 60 in age had the highest level of stress: (c) the female residents had more stress than male residents, (d) particularly, the residents who were more than 60 years old in the middle city had the highest level of stress. Further, the results of factor analysis showed that there were three factors of social dysfunction, depression and anxiety and psychosomatic symptom. The social dysfunction factor was statistically significant in both age and resident area variables. The depression and anxiety factor was statistically significant in the residents' area, age, sex variables. The psychosomatic symptom factor was statistically significant in both age and sex variables. The study suggested that they should give a special attention to solve the old people's stress because stress was closely related to residents' age.

• 동아시아식생활학회지
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• 제3권2호
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• pp.73-81
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• 1993

The purpose of this study is to examine the level of customers' cognition, the patterns of shopping and the level of satisfaction for foods sold in "24-hour market stor", and thus to provide a guideling for establishment of 24-hour market store", and thus to provide a guideline for establishment of 24-hour market store, development of Korean-style food, and enhancement of desirable habit of eating. The study conducted a survey for the young customers (13-19 years old) and the old customers (20-38 years old), the residents in Tague City, for the period Sept. 1-Sept.30. The survey administered to a total of 700 respondents, and finally received 646 ansers. Data analysis incorporates Chi-square test, univariate analysis, Scheffe's test, and correlation analysis, running SPSS Pc+(Statistical Package for Social Science). The results were drawn as follows: In terms of the level of cognition, results show a high level in the aspects of availability, convenience, time-saving in cooking, a variety of goods, easy custody: a medium level in the aspects of taste and sanitation: a low level in the aspects of cheapness and import of foreign food, In terms of customers' shopping patterns, the results show that the respondents answered the most convenience in 24-hour open and nearby location. Shopping was mostly done during the evening time between 18:00 and 22:00, and frequently during the mid-night time. Most of the residents needed a high level in the price. in terms of the level of customers' satisfaction, the results show a high level in the aspects of convenience, packing, and variety ; a medium level in the aspects of taste and sanitation ; a low level in the aspects of nutrition, price, import of foreign goods.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.1175-1176
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• 1993

This paper introduces a new model for forecasting groundwater level on the basis of analysing defect of finite element method. The new model is built with fuzzy sets and neural networks. It is convenient for use. We computed the groundwater level of one city in P. R. China with it and got a very satisfactory result. It can be popularized to corecast groundwater level of mine.