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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of The Korean Society of Civil Engineers
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Journal DOI :
Korean Society of Civil Engeneers
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Volume & Issues
Volume 35, Issue 6 - Dec 2015
Volume 35, Issue 5 - Oct 2015
Volume 35, Issue 4 - Aug 2015
Volume 35, Issue 3 - Jun 2015
Volume 35, Issue 2 - Apr 2015
Volume 35, Issue 1 - Feb 2015
Selecting the target year
Engineering Performance and Applicability of Eco-Friendly Concrete for Artificial Reefs Using Electric Arc Furnace Slags
Jo, Young-Jin ; Choi, Se-Hyu ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 533~544
DOI : 10.12652/Ksce.2015.35.3.0533
Unlike the concrete structure built on land, that exposed to the marine environment is greatly degraded in durability due to the exposure to not only the physical action caused by sea wind, tide, and wave, but also the harsh conditions, including the chemical erosion and freeze-thaw which result from
ions in seawater. In the process of the large scaled construction of submerged concrete structures, of course environmental hazardous substance, such as alkaline (pH) and heavy metals, may be leached. Thus, this issue needs to be adequately reviewed and studied. Therefore, this study attempted to develop a CSA (Calcium Sulfo Aluminate) activator using electric arc furnace reducing slags, as well as the eco-friendly concrete for artificial reefs using electric arc furnace oxidizing slag as aggregate for concrete. The strength properties of the eco-friendly concrete exposed to the marine environment were lower than those of the normal concrete by curing 28 days. This suggest that additional studies are needed to improve the early strength of the eco-friendly concrete. With respect to seawater resistance of the eco-friendly concrete, the average strength loss against 1 year of curing days reached 8-9%. the eco-friendly concrete using high volume of ground granulated blast furnace slags and high specific gravity of electronic arc furnace oxidizing slag demonstrated the sufficient usability as a freeze-thaw resistant material. With respect to heavy metal leaching properties of the eco-friendly concrete, heavy metal substances were immobilized by chemical bonding in the curing process through the hydration of concrete. Thus, heavy metal substances were neither identified at or below environmental hazard criteria nor detected, suggesting that the eco-friendly concrete is safe in terms of leaching of hazardous substances.
Projection of Future Snowfall and Assessment of Heavy Snowfall Vulnerable Area Using RCP Climate Change Scenarios
Ahn, So Ra ; Lee, Jun Woo ; Kim, Seong Joon ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 545~556
DOI : 10.12652/Ksce.2015.35.3.0545
This study is to project the future snowfall and to assess heavy snowfall vulnerable area in South Korea using ground measured snowfall data and RCP climate change scenarios. To identify the present spatio-temporal heavy snowfall distribution pattern of South Korea, the 40 years (1971~2010) snowfall data from 92 weather stations were used. The heavy snowfall days above 20 cm and areas has increased especially since 2000. The future snowfall was projected by HadGEM3-RA RCP 4.5 and 8.5 scenarios using the bias-corrected temperature and snow-water equivalent precipitation of each weather station. The maximum snowfall in baseline period (1984~2013) was 122 cm and the future maximum snow depth was projected 186.1 cm, 172.5 mm and 172.5 cm in 2020s (2011~2040), 2050s (2041~2070) and 2080s (2071~2099) for RCP 4.5 scenario, and 254.4 cm, 161.6 cm and 194.8 cm for RCP 8.5 scenario respectively. To analyze the future heavy snowfall vulnerable area, the present snow load design criteria for greenhouse (cm), cattleshed (
), and building structure (
) of each administrative district was applied. The 3 facilities located in present heavy snowfall areas were about two times vulnerable in the future and the areas were also extended.
Development of Seawater Intrusion Vulnerability Index Using AHP
Yang, Jeong-Seok ; Kim, Il-Hwan ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 557~565
DOI : 10.12652/Ksce.2015.35.3.0557
Sea level rise due to global warming causes seawater intrusion into aquifers in coastal areas. Seawater intrusion vulnerability index was developed using PSR (Pressure, State, Response) model and analysis hierarchy process (AHP). Coastal regions in Korea, Gangwon-do Sokcho-si, Incheon-si Ganghwa-gun, Chungcheongnam-do Taean-gun, Jeollanam-do Yeosu-si, Jindo-gun were chosen and 14 indicators were selected by considering the humanities, economic, social, environmental aspects. Re-scaling method was used for the standardization of indices and questionnaire survey was performed to calculate weight values for each index. The results showed that Yeosu-si was selected as the most vulnerable region to seawater intrusion. The seawater intrusion index developed in this research can be used to analyze the vulnerable regions to seawater intrusion and to establish a policy to minimize the seawater intrusion problems in coastal regions.
Assessment of Climate and Land Use Change Impacts on Watershed Hydrology for an Urbanizing Watershed
Ahn, So Ra ; Jang, Cheol Hee ; Lee, Jun Woo ; Kim, Seong Joon ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 567~577
DOI : 10.12652/Ksce.2015.35.3.0567
Climate and land use changes have impact on availability water resource by hydrologic cycle change. The purpose of this study is to evaluate the hydrologic behavior by the future potential climate and land use changes in Anseongcheon watershed (
) using SWAT model. For climate change scenario, the HadGEM-RA (the Hadley Centre Global Environment Model version 3-Regional Atmosphere model) RCP (Representative Concentration Pathway) 4.5 and 8.5 emission scenarios from Korea Meteorological Administration (KMA) were used. The mean temperature increased up to
and the precipitation showed maximum 21.2% increase for 2080s RCP 8.5 scenario comparing with the baseline (1990-2010). For the land use change scenario, the Conservation of Land Use its Effects at Small regional extent (CLUE-s) model was applied for 3 scenarios (logarithmic, linear, exponential) according to urban growth. The 2100 urban area of the watershed was predicted by 9.4%, 20.7%, and 35% respectively for each scenario. As the climate change impact, the evapotranspiration (ET) and streamflow (ST) showed maximum change of 20.6% in 2080s RCP 8.5 and 25.7% in 2080s RCP 4.5 respectively. As the land use change impact, the ET and ST showed maximum change of 3.7% in 2080s logarithmic and 2.9% in 2080s linear urban growth respectively. By the both climate and land use change impacts, the ET and ST changed 19.2% in 2040s RCP 8.5 and exponential scenarios and 36.1% in 2080s RCP 4.5 and linear scenarios respectively. The results of the research are expected to understand the changing water resources of watershed quantitatively by hydrological environment condition change in the future.
A Study on the Field Application of Nays2D Model for Evaluation of Riverfront Facility Flood Risk
Ku, Young Hun ; Song, Chang Geun ; Park, Yong-Sung ; Kim, Young Do ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 579~588
DOI : 10.12652/Ksce.2015.35.3.0579
Recent climage changes have resulted in increases in rainfall intensity and flood frequency as well as the risk of flood damage due to typhoons during the summer season. Water-friendly facilities such as ecological parks and sports facilities have been established on floodplains of rivers since the river improvement project was implemented and increases in the flood levels of rivers due to typhoons can lead to direct flood damage to such facilities. To analyze the hydraulic influence of these water-friendly facilities on floodplains or to evaluate their stability, numerical analysis should be performed in advance. In addition, it is crucial to address the drying and wetting processes generated by water level fluctuations. This study uses a Nays2D model, which analyzes drying and wetting, to examine its applicability to simple terrain in which such fluctuations occur and to natural rivers in which drying occurs. The results of applying this model to sites of actual typhoon events are compared with values measured at water level observatories. Through this comparison, it is determined that values of coefficient of determination (
), mean absolute error (MAE), and root-mean-square error (RMSE) are 0.988, 0.208, and 0.239, respectively, thus showing a statistically high correlation. In addition, the results are used to calculate flood risk indices for evaluation of such risk for water-friendly facilities constructed on floodplains.
Performance Analysis of OWC-MB Hybrid Wave Energy Harvesting System Attached at Caisson Breakwater
Seo, Ji Hye ; Park, Woo-Sun ; Lee, Joong Woo ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 589~597
DOI : 10.12652/Ksce.2015.35.3.0589
Wave energy harvesting system using OWC(Oscillating Water Column) and MB (Movable Body) attached at the caisson breakwater was studied. This system was suggested to maximize wave energy extraction using resonant phenomena of oscillating water column and buoy in wave channel (Park et al., 2014). Not only incident waves but also reflected waves from the breakwater can be used as sources of exciting force for harvesting wave energy efficiently. Using Galerkin finite model based on the linear wave theory (Park, 1991), the performance of the system was evaluated for various damping ratios of power take off system. Numerical results show that the proposed system is excellent in efficiency compared with that of conventional system and the performance of the system is governed by the resonance of oscillating water column in the wave channel. In addition, the additional efforts to minimize viscous damping was found to be necessary because viscous damping occurring in the channel and around the moving buoy is significant in generation efficiency.
Analysis of Landslide Hazard Map during Earthquake with Various Degrees of Saturation and Cohesion Values
Lee, Joonyong ; Han, Jin-Tae ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 599~606
DOI : 10.12652/Ksce.2015.35.3.0599
Damage of landslide due to earthquake covers a considerable part of total damage due to earthquake. Landslide due to earthquake affects direct damage of human lives and structures, and social system can be paralyzed by losing functions of roads, basic industries, and so on. Therefore, systematic and specialized research examining the factors affecting the slope stability by earthquakes should be needed. However, method of evaluation of slope stability problems due to earthquake contains somewhat uncertainty since many soil properties are predicted or assumed. In this study, influences of change of soil properties such as degree of saturation and cohesion value are analyzed in factor of safety and displacement using seismic landslide hazard maps based on GIS. As the degree of saturation increases or cohesion decreases, it is found that seismic landslide hazard area marked with factors of safety or displacements tends to increase. Therefore, to draw more exact landslide hazard map during earthquake, it is necessary to obtain accurate soil property information preferentially from site investigation data in the field.
Determination of Dimension of Vertical Curve Elements at Parking Lot Ramps
Kwon, Sung-Dae ; Kim, Yoon-Mi ; Hong, Jeong-Pyo ; Ha, Tae-Jun ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 607~616
DOI : 10.12652/Ksce.2015.35.3.0607
The demand for cars has been so steadily increasing based on the economic growth that the number of registered cars reached 18,870,000 as of the end of December, 2012. Due to this, the demand for the parking lots also rises continuously. Because of the limited ground space, the buildings ever becoming larger, and the trend of underground parking spaces, recent parking spaces are generally constructed underground. Accordingly, the parking lot ramps slope is limited to less than 17% by relevant laws to ensure the driver safety. However, when a driver enters a parking lot ramps whose slope is slightly steep, he frequently experiences his car body colliding with ramp brackets and often sees the scratches on ramp floor. Thus, this study is intended to prevent any damage to a structure and to contribute to ensuring the riding comfort and safety of drivers and passengers by presenting the details of proper vertical curve to prevent the collision of vehicles with ramp brackets through a vertical analysis of the first and last parts of a parking lot ramps. Because it is necessary to decide the appropriate and suitable vertical slope of a parking lot ramps, this study first identified the problems through site inspection, targeting the parking lot ramps of large buildings frequently that are used by many random people. Next, the possibility of mutual collision was assessed through a theoretical analysis of the first and last parts of a parking lot ramps. Lastly, the vertical curve of a parking ramp was analyzed to estimate its details, which was presented in this study. In conclusion, if the vertical curve presented through this study is used, it will help prevent any damage to the cars and structures, ensure the riding comfort and safety of the drivers, and further reestablish the criteria for vertical installation of a parking lot ramps.
An Analysis of the Effects of Walking Guidance System in Subway Stations using Genetic Algorithm
Kim, Jin-Ho ; Lee, Joo-Yong ; Kim, Tae-Wan ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 617~624
DOI : 10.12652/Ksce.2015.35.3.0617
The conflict of opposing pedestrian traffic-flow in a subway station(made up of stair, passageway, and escalator) diminishes the convenience and mobility of its users. In addition, the station's efficiency would be negatively affected by the growth of delay and queue length in pedestrian facilities. As these phenomena have been resulted by the overlapping in pedestrian's traffic-line, the separation of it would alleviate these problems. For the criteria and methodology of separation, this paper has investigated the bi-directional queue length and delay on the entrance of each facility (stair, passageway and escalator). Since the pedestrian flow exists bidirectionally, we have used the weighted average by inflow rate for the delay value. For the optimization of the separation, the Genetic Algorithm has been utilized in order to minimize the delay.
The Consideration on Calculation of Optimal Travel Speeds based on Analysis of AVI Data
Jeong, Yeon Tak ; Jung, Hun Young ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 625~637
DOI : 10.12652/Ksce.2015.35.3.0625
This study aims to calculate optimal travel speeds based on analysis of the AVI data collected in the uninterrupted traffic flow, and the results are as follows. Firstly, we looked into the distribution of the sectional travel times of each probe vehicle and compared the difference in the sectional travel speeds of each probe vehicle. As a result, it is shown that outliers should be removed for the distribution of the sectional travel times. Secondly, there were differences among type 1(passenger automobiles) & type 2(automobiles for passengers and freight) and type 4(special automobiles) in the non-congestion section. thus it was revealed that there is a necessity to remove type 4(special automobiles) when calculating the sectional travel speeds. Thirdly, Based on the results of these, the optimal outlier removal procedures were applied to this study. As a result, it showed that the MAPE was between 0.3% and 2.0% and RMSE was between 0.3 and 2.3 which are very similar figures to the actual average traffic speed. Also, the minimum sample size was satisfied at the confidence level of 95%. The result of study is expected to serve as a useful basis for the local government to build the AVI. In the future, it will be necessary to study to integrate AVI data and other data for more accurate traffic information.
A Study on Priority Evaluation of the Rope-type Platform Safety Door(RPSD) Installation by Multi-criteria Decision Analysis
Jung, Byung Doo ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 639~645
DOI : 10.12652/Ksce.2015.35.3.0639
Recently, a study on the commercialization of Rope type Platform Safe Door (RPSD) technology has commenced. The study focuses on RPSD, in which a rope screen ascends to allow safe passage from the platform to the transit vehicle in aboveground stations. Currently, a pilot installation has taken in place with Daegu Metro Line 2 in MoonYang station starting from March of 2013. However, there is a need to select an appropriate pilot installation's object for the improvement in the future RPSD. An appropriate designation would correspond with the needs of the railroad corporation and as a historic railway platform with safe facilities. This study tried to usa Analytic Hierarchy Process (AHP) to determine the priority of the KTX stations to attain a list of appropriate designations for future RPSD installations by analyzing the followings: management of the facilities, operational risks, and intent of business projects. As a case study, it was applied to the evaluation of the KTX stations. For the application, it used relative measurement to calculate the weight of upper level structuring, and absolute measurement for low level structuring instead of pairwise comparisons.
A Study on the TOD Planning Elements Affecting the Number of Public Transportation Users - Focused on the Subway and Railway Station in Incheon -
Kim, Ki Hyung ; Lee, Joo Hyung ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 647~662
DOI : 10.12652/Ksce.2015.35.3.0647
This study analyzes the factors that influence the number of public transportation passengers. By comparing the major TOD planning elements such as mixed-use level, job-housing proximity level, comparison of the density and pure density in the 66-autonomous city townships through a comparison such as TOD plan element achievements and indicators are chosen. A model is derived by correlation analysis and regression analysis of the parameters. The result of the regression analysis of the station influence area (SIA) in Incheon, the parameters that effect the number of passengers of public transportation are the number of employees, population, number of bus stops in the SIA, and the distance between the bus stop and the subway entrance. Therefore, as the number of employees and the resident population increase, the volume of traffic increases. Also, the number of public transportation users increases when there are more bus stops and when the distance between the bus stop and the subway entrance is short. This study shows that subways and SIA has achieved many parts of the TOD in Incheon, because the SIA around 29 subways and 11 Seoul-Incheon trail stations already included important TOD planning elements.
An Importance-Performance Analysis(IPA) for Bus Users Travel Time by Using Structural Equation Model(SEM)
Ahn, Woo-Young ; Lee, Sol ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 663~670
DOI : 10.12652/Ksce.2015.35.3.0663
In most public transportation related master plans, decisions for investment priorities are initially made by facilities with lower installation rates or lower satisfaction (performance) levels. In general, the decisions are made without conducting importance factor analysis. In this study, a combined method of importance-performance analysis (IPA) model for bus users related in travel time is proposed by using Structural Equation Model (SEM). The results of the IPA for Metropolitan users show that the categories need improvement are number of bus stops, number of intersections, headways, waiting times for boarding and traffic signal operations in order. On the other hand, Non-Metropolitan uses show that the categories need improvement are traffic signal operations, waiting times for boarding, headways, bus exclusive lanes and number of intersections that is in reverse order to Metropolitan users.
Evaluation of the Less Development Indicator Based on Transportation Connectivity
Park, Shin Hyoung ; Kim, Dongsun ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 671~678
DOI : 10.12652/Ksce.2015.35.3.0671
When evaluating the feasibility of construction projects of large-scaled transportation facilities such as roads or railways based solely on the result of the economic analysis, less development indicators are politically reflected on the investment decision-making because regions whose socio-economic indicators are poor may be disadvantaged or underserved for the projects. Existing less development indicators, however, does not consider the transportation connectivity which indicates how effective the transportation networks are established for the transport of people and goods. In this study, travel time contour maps, travel distance and travel time between regions, and a route curvature were utilized to define new indices which reflect transportation connectivity on the less development indicators. When the new indices are applied, the existing rankings of under-developedness were changed, which means that transportation connectivity could effect on the political decision. In this study, we also suggested the necessity of considering the transportation connectivity when evaluating less development indicators, developed measures of inter-regional linkages, and performed the whole procedures of combining existing and new indices to evaluate the less development indicators.
Development of Optimum Traffic Safety Evaluation Model Using the Back-Propagation Algorithm
Kim, Joong-Hyo ; Kwon, Sung-Dae ; Hong, Jeong-Pyo ; Ha, Tae-Jun ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 679~690
DOI : 10.12652/Ksce.2015.35.3.0679
The need to remove the cause of traffic accidents by improving the engineering system for a vehicle and the road in order to minimize the accident hazard. This is likely to cause traffic accident continue to take a large and significant social cost and time to improve the reliability and efficiency of this generally poor road, thereby generating a lot of damage to the national traffic accident caused by improper environmental factors. In order to minimize damage from traffic accidents, the cause of accidents must be eliminated through technological improvements of vehicles and road systems. Generally, it is highly probable that traffic accident occurs more often on roads that lack safety measures, and can only be improved with tremendous time and costs. In particular, traffic accidents at intersections are on the rise due to inappropriate environmental factors, and are causing great losses for the nation as a whole. This study aims to present safety countermeasures against the cause of accidents by developing an intersection Traffic safety evaluation model. It will also diagnose vulnerable traffic points through BPA (Back -propagation algorithm) among artificial neural networks recently investigated in the area of artificial intelligence. Furthermore, it aims to pursue a more efficient traffic safety improvement project in terms of operating signalized intersections and establishing traffic safety policies. As a result of conducting this study, the mean square error approximate between the predicted values and actual measured values of traffic accidents derived from the BPA is estimated to be 3.89. It appeared that the BPA appeared to have excellent traffic safety evaluating abilities compared to the multiple regression model. In other words, The BPA can be effectively utilized in diagnosing and practical establishing transportation policy in the safety of actual signalized intersections.
Experimental Study on the Long-term Performance of TiO
Concrete for Road Structures
Lee, Jun Hee ; Kim, Young Kyu ; Lee, Seung Woo ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 691~698
DOI : 10.12652/Ksce.2015.35.3.0691
In the area of high traffic volume, such as expressway across large cities, the amount of nitrogen oxides (NOx) emitted into the atmosphere as air pollution can be significant since NOx gases are the major cause of smog and acid rain. Recently, the importance of NOx removal has arisen in the world. Titanium dioxide (
), that is one of photocatalytic reaction material, is very efficient for removing NOx. Therefore, application of
concrete is a good alternative in order to remove NOx which is a main cause of air pollution. This experimental study aimed to evaluate the long-term performance of
concrete such as NOx removal efficiency due to performance period and environmental resistance for application of road structures. It was found that the
is reasonable applicable on the road structure because
concrete has a long-term performance.
Information Modeling for Construction Equipment Interface in Earthwork
Moon, Sungwoo ; Cho, Kyeongsu ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 699~706
DOI : 10.12652/Ksce.2015.35.3.0699
Earthwork is executed to provide a space for facility structures, and plays an important role in the construction operation. Contractors usually put a combination of construction vehicles to execute the earthwork operation. These construction vehicles need to interface with each other for productivity improvement. The objective of this study is to prototype an earthwork supportive system for information interface between construction vehicles. The study is conducted in a sequence of 1) analysis of information interface during earthwork; 2) data modeling of earthwork attributes; and 3) development of a prototype for the earthwork supportive system. The output screen images of the prototype show that the earthwork supportive system can improve communication between construction vehicles by facilitating information interface during earthwork.
Development of a Prototype for an Earthwork BIM Environment
Moon, Sungwoo ; Son, Jihong ; Hong, Soonheon ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 707~714
DOI : 10.12652/Ksce.2015.35.3.0707
The national government is pushing hard the adoption of the BIM (Building Information Modeling) technology in the construction industry. The BIM application provides a visualized environment where the construction manager can inspect the structure of buidling structures. The application also provides information on activity progresses as well as earned values. However, BIM is mostly applied to visualize a structural object with definite forms. The BIM technology needs to be extended to include an object with non-definite forms such as earthwork operations. The objective of this study is to present a prototype of earthwork BIM in the construction operation. The prototype has been built on the attributes of geological information, construction equipment and positioning. The prototype of earthwork BIM shows a 3D graphic simulation of construction equipment moving around for digging and loading.
An Earthwork Districting Model for Large Construction Projects
Baek, Hyeon Gi ; Kang, Sang Hyeok ; Seo, Jong Won ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 715~723
DOI : 10.12652/Ksce.2015.35.3.0715
Earthwork in a large construction project such as a land development generally costs 20-30% of the total cost. The earthmoving process, comprising of four repetitive tasks: loading, hauling, unloading, returning, is quite simple and it does not need delicate or advanced techniques. Therefore, earthmoving earthwork planning can heavily affect the cost and time., and Even a slight deviation from the plan can increase or decrease the cost and time. This study presents a planning model that minimizes average haul distance in a large complex construction project. Based on earthwork planning, practitioners' heuristics, a districting algorithm and Simulated Annealing algorithm were employed to build the model. Districting algorithm plays a role that divides in dividing an earthmoving area into several sections. Simulated annealing provides a function that decides whether a new generated solution is confident. Finally, the proposed model was applied to a real earthmoving project of a large land development. It was found that the model showed approximately 14% improvement in average hauling distance compared to the actual design plan.
A Study on the Factors Determining Officetel Price in Busan
Choi, Yeol ; Kim, Hyeong Jun ; Yeo, Jung Hoon ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 725~735
DOI : 10.12652/Ksce.2015.35.3.0725
The aim of this study is to specifically understand the officetel market by empirical analysis for the determining factors that affect determining the price of the officetel in Busan. In my opinion, it can help officetel providers to select the appropriate size and location that analysis for the factors determining officetel price with market price, and also it can help customers officetel to choice depending on the purpose. So I was conducting this study. In this study, I analyzes the factors determining the price of Officetel using a OLS linear regression, semi-log model, and a robust regression-Busan area Officetel Real Transaction Price as the dependent variable and factors representing the physical characteristics, locational characteristics and regional characteristics as independent variables.
A Study on the Improvement of Building Maintenance System - Focusing on Comparison with Japanese Case -
Yoon, Hyo-Jin ;
Journal of The Korean Society of Civil Engineers, volume 35, issue 3, 2015, Pages 737~745
DOI : 10.12652/Ksce.2015.35.3.0737
The purpose of this study is to clarify the challenges and suggest regulatory improvement strategy by investigating the Japanese building maintenance system which had been conducted for decades. The efficiency and problems of the current building maintenance system of Korea are analyzed by stake holders and purpose of management. The results show that several strategies are important to improve the quality of building maintenance. They include check list focusing on the purpose of maintenance, efficient and fair criteria, rational checking period considering owner's budget, cooperation with professionals in facilities, and promotion of professional companies participation. The results imply that the challenges should be solved systematically rather than individually.