• 대한토목학회논문집
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• 제34권2호
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• pp.549-559
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• 2014

도시의 급격한 팽창과 함께 주택부족 현상이 나타나게 되자, 정부는 주택부족 문제 해결을 위해 대규모 택지개발을 통하여 주택보급을 확대시켰다. 이러한 현상으로, 공동주택은 우리나라 전체 주택의 83% 수준을 유지하고 있고, 그 중 아파트가 차지하는 비중은 50%로 꾸준한 증가 추세를 보이고 있다. 이로 인해 아파트의 경우 입주민들의 승용차 보유 증가에 따른 아파트 단지 내 주차공간 부족문제 등 제반 주차 관련 문제가 발생하고 있다. 특히, 주차계획대수 수립 시 교통영향평가의 주차수요예측 중 전용면적을 고려한 주차원단위 산정 방법은 기존 계획보다 세대수는 증가하여도 전용면적이 작아지면 계획주차대수는 감소하는 것으로 나타나, 보다 현실적인 주차원단위 산정이 필요한 실정이다. 이에 본 연구는 공공주택 아파트를 대상으로 현실에 적합한 주차원단위를 산정하고자 한다. 현장조사 및 설문조사를 실시하고, 구득자료에 대한 분석을 수행함으로써, 기존 교통영향평가의 주차원단위 산정 문제점을 도출하였다. 또한, 주차수요예측에 영향을 미치는 요인 선정을 통해 주차원단위 산정모형을 개발하였다. 마지막으로 실제 조사된 아파트 주차원단위 자료를 통해 기존 교통영향평가의 주차원단위 산정과 본 연구에서 제시한 주차원단위 산정모형을 비교 분석하였다. 향후 본 연구에서 개발된 주차원단위 산정모형은 주차장법 기준 정립은 물론 보다 현실적인 주차수요예측 수행에 적극 활용될 수 있을 것으로 판단된다.

• 토지주택연구
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• 제9권3호
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• pp.29-36
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• 2018

This study aims at suggesting directions to make children's parks considering the actual groups using them by comparative analysis of age distribution in residents within area of use and locations of children's parks with regards to changes in population structure of low birth rate and aging. Cheongju was selected for the study, and the current status of children's parks and population structure were categorized into six stages and the investigation and analysis were conducted by statistics by population group and by using Arc GIS Program. As a result of the analysis, children under 13 were 13.1% of the entire population in Cheongju and share of middle-aged and aged group including middle-aged was 31.3%. Park area per one children under 13 was 5.9㎡ and based on walking use area(250m), average number of parks available by autonomous district was eight. As a result of the analysis of characteristics of distribution of children's parks, they are densely located in old downtowns or the distribution density was relatively high in newly developed areas such as Osong-eup or Ochang-eup. However, outer rural areas have no children's parks or relatively low rate. As a result of the analysis on population structure and co-efficient of park location, in nine autonomous districts, aged group is increasing, leading to decrease use of children's parks. If resident rate aged group is higher in the region where a children's park is located, it is necessary to re-compose the existing one to different one or to change purposes of parks to be planned. Also, in the area with similar rates in both children's group and aged group, composing complex parks for both of them could be considered. This study has limitations by not conducting field studies about the current status of use of children's parks in areas where the population structure has been changing and not suggesting specifically new types of parks according to changes in population structure. It is necessary to conduct the following studies about relationship between children's parks and policies for composing parks responding to changes in population structure in neighboring regions in future.

• Computers and Concrete
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• 제22권3호
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• pp.327-336
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• 2018

Increase in population and its daily increasing in our today society results in an increase in housing demand while traditional methods are not applicable. The project preparation and realization processes, based on theoretical and empirical studies, a creation of goods, services, and technologies, are the most important human activities. Selection of effective technological systems in construction is a complex multi-criteria decision-making task. Many decision-makers refuse innovations once faced with similar difficulties. Therefore, using modern materials and methods in this industry is necessary. Modern methods increase quality and construction speed in addition to decrease energy consumption and costs. One of the problems in the way of any project is selecting construction system compatible with the project needs and characteristics. In the present research, different concrete structures such as common reinforced concrete (RC) structure, prefabricated, Insulating Concrete Formwork (ICF), 3D Panel and Tunnel Concrete Formwork (TCF) for buildings with limited floors in Iran are studied and compared from the viewpoint of different criteria like cost, time, applicability and technical characteristics with industrialization approach. Therefore, some questionnaires filled out by construction industry experts in order to compare criteria and sub-criteria in addition to evaluation of optimized structural systems. Then, results of the questionnaires ranked by Analytic Hierarchy Process (AHP) and the most effective alternative selected. The AHP results show that 3D Panel system 36.5%, ICF 21.7%, TCF 19.03%, prefabricated system 13.3% and common RC system 9.3% are the most and the least efficient systems respectively.

• 대한예방한의학회지
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• 제21권1호
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• pp.67-81
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• 2017

Objectives : The purpose of this study was to analyze the report conducted in 2014 by the Ministry of Health and Welfares on influences of private insurance coverage on the use of Korean medicine. Methods : We analyzed Ministry of Health and welfares report on the use and consumption of Korean medicine to fit the purpose of this study. Comparison between private insurance holders and non-holders was made in the areas of sociodemographic characteristics, patient distribution by disorders, total number of disorders and existence of complex diseases, general perception of Korean medicine, and medical expenses and visits. Logistic regression analysis was made to verify the private insurance coverage. Results : Among sociodemographic characteristics, significant differences were observed in age distribution, education, professions, income level, and housing factors. But genders, area of residence, and marital status didn't show significant differences. Other significant differences including side effects, experience with Korean medicine, herbal medicine and acupuncture treatments, and main visiting facilities were shown between private insurance holders and non-holders. Majority of disorders treated with Korean medicine were musculoskeletal issues, and criteria of number of disorders, multiple diseases factors, and medical expenses/visits showed significant differences between the two groups. Conclusions : Summarizing above results indicate that holding a private insurance in addition to National Health Insurance contributes significant influences on the use of Korean medicine.

• 한국태양에너지학회 논문집
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• 제40권5호
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• pp.23-34
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• 2020

Concentrator photovoltaic (CPV) system consists of high-quality complex optical elements, mechanical devices, and electronics components and can have the advantages of high integration and high-efficiency energy sources. III-V compound semiconductor cells have proven performance based on high reliability in the aerospace field, but have characteristics that require absolute support of the balance of systems (BOS) such as solar position trackers, receivers with heat sinks, and housing instruments. To determine the optimum parameters of secondary optical elements (SOEs) design for CPV systems, we designed three types of CPV modules, classified as non-SOEs type, reflective mirror type, and CPC lens type. We measured the I-V and P-V characteristics of the prototype CPV modules with the angle of inclination varying from 0° to 12° and with a 500-magnification Fresnel lens. The experimental results assumed misalignment of the solar position tracker or module design of pinpoint accuracy. As a result, at the 0° tilt angle, the CPC lens produced lower power due to the quartz transmittance ratio compared to that by other SOEs. However, for tilt angles greater than 3°, the CPC lens type module achieved high efficiency and stability. This study is expected to help design high-performance CPV systems.

• 한국지역지리학회지
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• 제6권1호
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• pp.29-49
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• 2000

본 연구는 대구시의 대표적인 주공혼재지역인 북구 노원1 2가동을 사례로 산업지역사회의 관점에서 주공혼재지역으로의 형성과정과 영세제조업체의 존립기반을 분석하였다. 연구대상지역은 1993년 준공업지역에서 준주거지역으로의 용도지역 변경을 계기로 영세 제조업체 및 관련 서비스업과 주택이 혼재하고, 생산활동과 생활활동이 공존하는 전형적인 산업지역사회로 급속하게 변모하였다. 산업지역사회 기반으로서의 영세제조업체의 핵심적 존립기반은 중소 생산자본을 중심으로 한 생산과정상의 수평적이고 역내 통합적 네트워크 생산체계와 그 보완장치로서의 사회적 네트워크를 매개로 한 산업환경으로 집약된다.

• 토지주택연구
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• 제4권4호
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• pp.417-424
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• 2013

본 연구에서는 2012년에 입주되는 신축공동주택을 대상으로 실시된 실내공기질 측정결과를 통하여 실내공기질의 계절별 특성을 조사하고자 하였다. 측정대상은 전국에 걸친 43개의 공동주택 단지였으며, 입주 전 베이크아웃이 실시된 상태였다. "실내공기질공정시험기준"(환경부)에 준하여 측정하였으며, 포름알데히드, 벤젠, 톨루엔, 에틸벤젠, 자일렌, 크실렌의 6개 항목의 단지별 평균방출량을 분석하였다. 측정결과, 실내온도가 $30^{\circ}C$까지 상승하는 하절기로 갈수록 실내공기오염물질이 다량 방출되는 특성을 확인할 수 있었으며, 모든 항목이 권고기준 이하로 나타났다. 포름알데히드 평균 방출농도는 실내온도가 $25^{\circ}C$이상 높아지는 6월~9월의 방출량이 높게 나타나는 것을 알 수 있으며, 벤젠의 평균 방출농도는 모든 계절에 소량으로 방출되는 것으로 나타났다. 톨루엔 및 에틸벤젠의 평균 방출농도는 실내온도 $22^{\circ}C{\sim}30^{\circ}C$까지 상승하는 4월~8월에 방출량이 다소 높게 나타났으며, 자일렌, 스티렌 방출량은 모두 4월에 많이 방출된 것으로 나타났으나 일년에 걸쳐 큰 편차없이 고르게 방출되는 것으로 나타났다. 향후에는 세부적인 온도조건과 오염물질 방출량과의 상관관계를 조사하기 위해서는 현장에서 측정세대마다 온도조건을 다르게 조절하여 오염물질방출량 측정분석을 통해 정량적 상관관계를 살펴 볼 필요성이 있을 것으로 판단된다.

• 토지주택연구
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• 제14권1호
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• pp.33-46
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• 2023

본 연구는 코로나19 팬데믹 기간 동안 서울시 대규모 아파트단지를 대상으로 가격 영향 요인을 도출하고, 이질적 시장으로 인식되고 있는 강남권과 비강남권 지역의 차이를 비교하였다. 분석방법은 본 연구의 요약과 시사점은 다음과 같다. 첫째, 서울시 모형 분석결과 대규모 단지 아파트 가격의 변화는 기존 연구결과와 달리 아파트의 개별특성은 유의한 영향을 주지 않는 반면 거시경제변수인 이자율과 통화량에 의해 영향을 받는 것으로 나타났다. 한편, 이자율과 총통화량 변수의 단위를 고려했을 때 두 변수들이 아파트 매매가격에 영향을 미치는 정도가 매우 높은것으로 판단된다. 둘째, 강남권 모형 분석결과 서울시 전체 모형과 같이 아파트 가격의 변화는 이자율과 통화량에 의해 크게 영향을 받으며, 세대수와 평균면적이 클수록 아파트가격은 높아지는 것으로 나타났다, 셋째, 비강남권 모형 분석결과 또한 이자율과 통화량에 의해 아파트가격이 크게 영향을 받는 것으로 나타났으나, 강남권 모형과 달리 미시특성변수 중 지하철역과의 거리, 용적률이 매매가격에 영향을 주는 것으로 나타났다. 마지막으로, 세 모형 분석결과 이자율과 통화량이 공통적으로 아파트가격 변화의 주요한 영향요인으로 나타났으나, 비강남권 지역의 대규모 단지 아파트가격이 이자율과 통화량의 변화에 보다 민감하며, 이에 비해 강남권 지역의 아파트가격은 이들 변수에 대해 둔감하게 반응하는 특징을 보여주고 있다.

• 한국도로학회논문집
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• 제20권3호
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• pp.47-57
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• 2018

PURPOSES : The permeable pavement type has been rapidly developed for solving problems regarding traffic noise in the area of housing complex and heavy rainwater drainage in order to account for the climate change. In this regards, the objective of this study is to figure out the characteristics of pavement types. METHODS : The laboratory test for deriving optimum asphalt content (OAC) was conducted using the mixtures of the permeable asphalt surface for the pavement surface from Marshall compaction method. Based on its results, the pavement construction at the test field was conducted. After that, the site performance tests for measuring the traffic noise, strength and permeability were carried out for the relative evaluation in 2 months after the traffic opening. The specific site tests are noble close proximity method (NCPX), Light falling deflectometer test (LFWD) and the compact permeability test. RESULTS : The ordered highest values of the traffic noise level can be found such as normal dense graded asphalt, drainage and porous structure types. In the results from LFWD, the strength values of the porous and drainage asphalt types had been lower, but the strength of normal asphalt structure had relatively stayed high. CONCLUSIONS :The porous structure has been shown to perform significantly better in permeability and noise reduction than others. In addition to this study, the evaluation of the properties and the determination of the optimum thickness for the subgrade course under the porous pavement will be conducted using ground investigation technique in the further research.

• Structural Engineering and Mechanics
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• 제56권4호
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• pp.667-694
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• 2015

The suspended dome system is a new structural form that has become popular in the construction of long-span roof structures. Suspended dome is a kind of new pre-stressed space grid structure that has complex mechanical characteristics. In this paper, an optimum topology design algorithm is performed using the enhanced colliding bodies optimization (ECBO) method. The length of the strut, the cable initial strain, the cross-sectional area of the cables and the cross-sectional size of steel elements are adopted as design variables and the minimum volume of each dome is taken as the objective function. The topology optimization on lamella dome is performed by considering the type of the joint connections to determine the optimum number of rings, the optimum number of joints in each ring, the optimum height of crown and tubular sections of these domes. A simple procedure is provided to determine the configuration of the dome. This procedure includes calculating the joint coordinates and steel elements and cables constructions. The design constraints are implemented according to the provision of LRFD-AISC (Load and Resistance Factor Design-American Institute of Steel Constitution). This paper explores the efficiency of lamella dome with pin-joint and rigid-joint connections and compares them to investigate the performance of these domes under wind (according to the ASCE 7-05), dead and snow loading conditions. Then, a suspended dome with pin-joint single-layer reticulated shell and a suspended dome with rigid-joint single-layer reticulated shell are discussed. Optimization is performed via ECBO algorithm to demonstrate the effectiveness and robustness of the ECBO in creating optimal design for suspended domes.