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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 22, Issue 6D - Nov 2002
Volume 22, Issue 6C - Nov 2002
Volume 22, Issue 6B - Nov 2002
Volume 22, Issue 5D - Sep 2002
Volume 22, Issue 5C - Sep 2002
Volume 22, Issue 5B - Sep 2002
Volume 22, Issue 2D - Mar 2002
Volume 22, Issue 2C - Mar 2002
Volume 22, Issue 1D - Jan 2002
Selecting the target year
Development and Application of GIS-based Resident-Prioritized Parking Design Support System
Kim, Hwang-Bae ; Kim, Si-Gon ; Kang, Seung-Pil ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1029~1035
The Purpose of this paper is to develop GIS-based Resident-Prioritized Parking Design Support System which can be used for designing the quantity of parking slots at the specific block or along the road inside residential area. The current situation and problems of parking are described at the road inside residential area in the beginning. The cause of parking problems are also analyzed. As one of solutions for relieving this problem, GIS techniques are introduced. Core functions for this Resident-Prioritized Parking Design Support System are boiled down into i) Parking demand and supply analysis and parking demand forecasting and ii) Query and statistic analysis fer database about parking issues. Finally, this system is developed and is applied to Nonhyundong at Kangnam area in Seoul.
Development of GIS-based Resident-Prioritized Parking Operation and Management System
Kim, Si-Gon ; Kim, Hwang-Bae ; Oh, Seung-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1037~1044
The Purpose of this paper is to develop GIS-based Resident-Prioritized Parking Operation and Management System which can be used for operating and managing Resident-Prioritized Parking area. In the beginning, the current situation and problems in operating and managing Resident-Prioritized Parking area are described. As one of solutions fer relieving this problem, GIS techniques are introduced. PDA and CCTV gadgets are also suggested for efficient parking operation and management. Core functions for this Resident-Prioritized Parking Operation and Management System are boiled down into i) Parking slot assignment and ii) Parking slot operation such as illegal parking and/or unhonest parking. Finally, this system is developed and is applied to Nonhyun-dong at Kangnam area in Seoul. For the better operation, Web-based Resident-Prioritized Parking Operation and Management System is also developed
Development and Application of the Microscopic Tollgate Simulator Using SIMPLUS
Cho, Yong-Sung ; Kim, Ho-Jung ; Lee, Sang-Keon ; Lee, Yong-Taeck ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1045~1055
The Macroscopic Toll Plaza Simulation Model using SIMPLUS has been developed for the evaluation of Toll Collection System including ETCS(Electronic Toll Collection System). The main purpose of this model is to support the establishment of toll plaza operation policies such as the number of opened toll booth, assignment of vehicle types to each booth, optimal number of ETCS lanes and so on. This model consists of several sub-modules like data input, car generation and lane assignment, toll plaza operation, toll booth assignment, car-following, lane change, MOE calculation and reporting module. This model well describe the traffic flow of toll operation as the results of the model validation to compare the field data with model output.
Estimation Model of Traffic Parameters by Measure of Traffic Noise
Oh, Ju-Sam ; Han, Dae-Cheol ; Cho, Yoon-Ho ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1057~1064
Current studies about traffic noises were focused on the side effects on the neighboring areas by traffic flows, speed, types of vehicles and/or types of pavement surface on highway. However, this papers concentrated on the methods to estimate traffic volume and occupancy by measuring magnitude of traffic noises. The field suey was performed on the two lane rural highways with asphalt pavement. The one was with small number of traffic volumes without any traffic obstacles near the highway, while the other was with large number of traffic flows with obstacles. Measuring traffic noises, data such as traffic volumes and occupancy were collected from traffic detectors installed on the survey spots. Through the researches, correlation was observed between traffic noises and traffic parameters. However, higher correlation was found when transforming the source data for traffic noises by filtering. A regression model that used the transformed variable as a independent variable was resulted in higher value of regression coefficient. (
for one point and 0.83 for the other) In addition, practical ranges of regression coefficient were observed between traffic noises and occupancy considering
for one point and 0.78 for the other. Therefore the proposed model that use magnitude of traffic noise can be used as a addition indicator for traffic volumes on the minor highway.
ITS Strategic Plan for Regional Level - Case of Kyonggi Province -
Bae, Sang-Hoon ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1065~1076
In the field of transportation, ITS was emerged in oder to meet the societal issue. Korean government has put various efforts to fulfill the goal of ITS since early nineties. The Ministry of Construction and Transportation played key role to enact Transportation System Efficiency Act that provides a foundation fer driving ITS. In addition, ITS R&D and deployment projects were launched. However, local governments that are main bodies of deploying ITS for their regions are not clear about their directions of driving ITS. In fact, they are not so certain about how to use national ITS strategic plan and ITS architecture when they initiate a project. This research, therefore, focuses on above-mentioned issues. Concretely, the first goal of the project was to establish the goal of the regional level ITS plan, and utilization of strategic plan. The second goal of the research is to focus on developing strategy for Kyonggj province as a sample case. This research will be a good starting point for further study for the advancement of ITS.
Development of Accident Prediction Models at Freeway Curve Section Based on Geometric Characteristics
Kang, Min-Wook ; Son, Bong-Soo ; Dho, Cheol-Ung ; Kang, Jung-Kyu ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1077~1088
Traffic accidents associated with road geometric characteristics are generated in any road section even though roads were well constructed with given design criteria. Geometric characteristics are the only factors under controling of human being. Therefore, road planners should make clear the relationships between traffic accidents and road geometric characteristics and furthermore, apply them to plan route location and design. This paper studies the effect of key geometric characteristics on crash rate for Ho-Nam Expressway. Accident data collected by Korea Highway Corporation for a five year period
were used. The accident analysis were focused on horizontal curve sections and classified them into single curve sections(SCS) and spiraled reverse curve sections(SRCS) according to decision sight distance. As a result, accident rate of SRCS were more higher than that of SCS. In addition, we developed two models available on each type of horizontal curve sections.
A Study for Road System Dependent Pre-timed Signal Control
Lee, Kwang-Hoon ; Shin, Chee-Hyun ; Lee, Sang-Gu ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1089~1103
This paper is a revisited research on an existing pre-timed signal control brought into attention in the course of converting a traffic signal control system into a real-time traffic responsive signal control. The pre-timed signal controls have been implemented in isolated intersection controls as well as in coordinated controls aiming at neighboring intersection groups. In these cases, most of the signal control parameters have been determined based on approaching features of traffic demands. The concept of the pre-timed coordinated control, newly proposed in the paper, exploits the idea of forcing traffics departing from an origin intersection to travel along the control-target segments without any stopping action by taking a distance, which is derived from the relationship between cycle and average travel speed, as a control-unit distance. In this case, the same amount of traffics departs from the destination intersection in the opposite direction, and then the separate offset values are calculated in proportion to distance differences from the departure point to intersections or to pedestrian crossings located along the target segments. Therefore, not only does this concept enable various phase combination, but also the minor-road traffic signal control can be designed without any confliction by taking advantage of spatial gap differences associated with directional traffic platoons and traffic platoons on the same direction. The NETSIM model, a traffic simulator, is adopted to verify the proposed concept. The various simulation results demonstrate that the proposed road-system-dependent pretimed signal control has a potential to be applied into real traffic simulations through some experimental field tests.
A Study of Perception Response Time on Various Operating Speeds
Lee, Soo-Beom ; Kim, Won-Chul ; Hong, Da-Hui ; Oh, Dong-Seob ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1105~1116
Current driver's perception response time(PR time) in road design is 2.5 seconds. This value is determined by the American Association of State Highway Officials(AASHO) in 1950's. In Korea, this value(2.5 seconds) has been adapted without any Justification. However, since driver's characteristics in Korea are different from ones in US, appropriate verification is needed for applying the foreign standard in Korea. In this paper, the driver's behaviors at signalized intersections have been recorded by video and the collected data are analyzed to find out the driver's perception response time in alerted condition. The results show that the perception response time varies with speeds. In low speeds, the driver's perception response time is longer than one in high speeds. Also, the collected values are compared with the current design standard (2.5 seconds). It shows that 90th percentile of collected data is justified with the current design standard.
A Traffic Control Strategy for Congested Exit-Ramp Area in Urban Freeway
Kim, Young-Chan ; Kim, Sung-Ryun ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1117~1124
Traffic control strategy for heavily congested exit ramps in urban freeway, especially for Ring-Road in Seoul, is presented in this paper. A new concept of traffic signal control was prepared fur the traffic signals engaged in the exit ramp and the immediate area. Traffic signal control methodology far oversaturated traffic conditions such as equity offset and imbalanced splits were applied. The exit ramps suffering from serious traffic congestion were selected for the test of the proposed control strategy. After simulation trials, it was found that the control strategy was effective in preventing main-line queue spill-back, and managing queue lengths between the exit traffic and the adjacent street traffic. Field test was conducted at Hongeun exit ramp. The traffic congestion at the Hongeun exit ramp was significantly relieved due to the exit ramp control.
Dynamic Backcalculation of Asphalt Concrete Pavement Moduli Using Artificial Neural Network
Choi, Suk-Myung ; Choi, Jun-Seong ; Kim, Soo-Il ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1125~1135
A pitfall of existing, widely used techniques for backcalculate pavement layer moduli from FWD results is that they are based on a static analysis of pavement responses. Significant errors in moduli can accrue from the discrepancy between this static assumption and the dynamic nature of the FWD test. This limitation can be overcome by applying artificial neural network technologies to the backcalculation procedure. Therefore artificial neural networks provide a fundamentally new approach to backcalculation of pavement layer moduli from Falling Weight Deflectometer(FWD) deflection basins. According to the bedrock depth (2, 4, 6, 8m), four backpropagation neural networks are trained to backcalculate pavement moduli for three-layer flexible pavement. Deflection basins obtained by using a commercial FEM code, ABAQUS. are used to train networks in the context of backcalculation. A neural network can also be trained to approximate the inverse function by repeatedly showing it forward problem solutions. Based on the comparison with psudo-static back-analysis, it is found that the most important advantage of using neural networks for back-calculation is speed. Neural networks trained in this study are much faster than conventional gradient search algorithm. Such speed makes realtime backcalculation of moduli possible. Also trained networks can backcalculate a wide broad of moduli, because a wide variety of layer moduli and thicknesses are used to train networks. Validity and applicability of artificial neural network proposed in this study were verified from numerical model tests and field test data of FWD and MDD test.
Determination of Performance Grade Varying with each Region for Securing the Resistance to Rutting in Asphalt Concrete Pavement
Ko, Seok-Beom ; Park, Tae-Soon ; Kim, Soo-Sam ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1137~1146
The main purpose of this study is to determine Performance Grade f3r the selection of optimum binder in major highway regions to minimize rutting in asphalt concrete pavement. The model to predict the pavement temperature is suggested through regression analysis from the relationship between the 3-year pavement temperature measured in the field and the 20-year air temperature using weather data analysis. The model of pavement temperature suggested in this study is compared with those of SHRP (1993) and Akiyama (1976). Based on the model suggested in this study, the national maximum and minimum pavement temperatures are determined from the air temperature which considered the probability of weather change for the past 20 years. The guideline to the application PG asphalt binder in major highway regions is drawn up to secure rutting resistance through reliability analysis of 50%, 70%, and 98%. The application of asphalt binder in Korea is examined from the guideline of PG application. Asphalt binder used currently in Korea satisfies the probability design of 50% while not satisfactory in more than 70%. The test results show that PG 70-22 binder should be used to reach 70% probability when the traffic and weather conditions are considered.
A Study of Using Soil of Weathered Granite and Slow Curing for Asphalt Mixtures
Cho, Gyu-Tae ; Han, Dong-Kyu ; Nam, Young-Kug ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1147~1155
The purpose of research find out strength property of soil(soil of weathered granite)-asphalt mixtures. As for the strength property of soil-asphalt mixtures, we carry out the experiment in the basis property and the various laboratory tests(Marshall Stability Test, Compression Strength Test, Shear Strength Test, Indirect Tension Test). The results of laboratory test were comparison and analysis by ASTM, Specification and the property of dense grade asphalt mixtures. The results of soil-asphalt mixture estimate the availability of the practical application for site and possibility of pavement materials. The result of the laboratory, the strength properties of soil-asphalt mixture are the same as dense grade asphalt mixtures and physical and mechanical properties are satisfied with ASTM and Specification. Soil-asphalt mixtures have got the good the physical and mechanical properties. It is possible to use new pavement material, when the emulsified cost will be down and more researches about the easy construction methods.
Evaluation on the Quality Characteristics of Recycled Asphalt Mixtures
Cho, Gyu-Tae ; Hwang, Hyo-Sub ; Nam, Young-Kug ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1157~1172
The fellowing research method has been adopted to recycle the reclaimed asphalt concretes in this study. The reclaimed asphalt pavement(RAP) collected from five street in Seoul. Collected RAPs were crushed, centrifuged, and extracted to separate asphalt binders from aggregates, and aggregate gradation, specific gravity, asphalt content, and binder penetration were measured. As the result, aggregate gradation was fumed out to satisfy the corresponding specification of the domestic surface and base layers. Specific gravity of aggregates was in the range of 2.61-2.85 for coarse aggregates and 2.55-2.68 for fine aggregates, and 2.56-3.02 for fillers. Asphalt content appeared to be close to or a little over the upper limit of design specification, while penetration depth was in the range of 30-60 that was capable of recycling. Virgin materials and their proportions in the mixture were evaluated to properly recover the original properties of mixtures from the aged concretes. And after recycled asphalt mixture specimens were made by fellowing the Marshall design method, quality were tested on the basis of the domestic specification of new asphalt mixtures (KS F 2349). To evaluate quality of RAPs, Marshall testing for 100% reclaimed materials were used and the results produced Marshall stability values of over 1000kg. Test samples made by adding additional new aggregates and virgin binders resulted in better values than the 100% reclaimed ones. Also, results of mechanical testing such as creep and resilient modulus test indicated that obtained test values of the recycled mixtures were in the similar range of those for new hot asphalt ones. It was concluded that all test results confirm capability of recovery of the original properties by recycling the reclaimed asphalt concretes, and the quality of recycled mixtures turned out to be superior. That is, recycling of the reclaimed asphalt concretes should be positively recommended and must actively practice to save natural resource and eliminate environmental problems. Finally, recycling technology must be spread widely by practicing in the everyday pavement construction under a strict quality control.
Evaluation of Mechanical Characteristics of SBS Polymer Modified Asphalt Mixtures upon Variation of Filler Contents
Park, Tae-Soon ; Cho, Hyuk-Ki ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1173~1182
Comparing with conventional asphalt binder, SBS polymer modified asphalt binder shows higher stiffness and has wider range of filler contents (2-10%), generally, suggested fur mix design. This study is conducted to investigate the different mechanical properties of SBS mixtures upon variation of the contents of filler which were varied 3, 6, and 9%. The test results include the optimum asphalt contents, temperature susceptibility, rutting resistance, and moisture susceptibility. The test results show that the optimum asphalt contents are decreased with increasing the contents of filler. The relationship between the mechanistic properties and the filler contents shows that with increasing the filler contents, the cracking resistance is improved. However, the temperature susceptibility and the rutting resistance are decreased. It can be concluded from the test results that the contents of filler should be controlled in order to meet the site conditions of the pavement constructed.
Application of Recycled Aggregate into Lean Concrete for Highway PCC
Yeo, Sung-Hun ; Im, Young-Hwan ; Cho, Yoon-Ho ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1183~1191
About 20 millions tons of construction wastes are produced in the Korea every year. As recycled aggregate is manufactured using these construction wastes, it is of interest how to recycle it into highway construction. This paper focus on the possibility of applying the recycled aggregate into lean concrete by testing environment impact and strength development. The strength of the concrete with 100% recycled aggregate is about
of the one with natural aggregate under the same w/c ratio. However, it meets specification because 7-day compressive strength of concrete specimen using recycled aggregate shows higher value than
, which is required for material used in subbase for the expressway. The strength of the concrete using natural fine aggregate is about 40% stronger than that of recycled concrete using recycled fine aggregate. In addition the recycled aggregate should no environmental problem because it is not leaching any heavy metal ions. Therefore it is convinced that the recycled aggregate can be used in sub-structure layers in PCC pavement. When impurity content is over 25% by volume, however, it may cause structural failure due to low strength, so that it can not be applied to pavement structure.
A Study on the Improvement of Certified Qualification Program
Lee, Tai-Sik ; Bae, Keon ; Park, Jong-Hyun ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1193~1203
Certified Qualification Program is introduced to cope with the opening of the construction market followed by the emergence of the WTO and the harmonious supply of the construction workforce demands. Though the Qualification program has contributed to achieve the purpose, harmonious supply of the technical workforce demands, it does have caused additional problems. Therefore, the problems of the Certified Qualification Program and its improvement were considered in this study, through analyzing advanced country's qualification system and comparing with Japanese one that is similar to domestic program. Additionally, This paper argues the necessary plans of both the policy trends of qualification program being promoted by government and the private qualification program.
Work Management Model to Integrate Cost and Schedule by Using Work Task
Park, Hong-Tae ; Kang, Leen-Seok ; Lee, Young-Dae ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1205~1217
Recently our government operates earned value management system (EVMS) for improving work management system of the construction projects over specific scale. The EVMS is based on the integrated management between construction cost and schedule, the existing systems, however, are focused on the cost management by using work quantity. This study suggests a work management model to integrate construction cost with activity information. The model introduces a work task concept as a tool that can connect construction cost to activity information. The suggested model in this study is verified by using actual data for the applicability to practical construction projects.
Technical & Economical Feasibility Analysis for the Development of a Hume-Pipe Laying Manipulator
Won, Young-Ho ; Son, Seok-Ho ; Kim, Young-Suk ; Lee, Jun-Bok ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1219~1234
The home concrete pipe laying works are conducted in most of the construction sites. In the case of advanced countries, several systems fer automating the hume pipe laying works have been developed to improve productivity, safety, and quality, and gain potential savings in costs. But there have been little efforts to accumulate technical know-how and develop a new method or equipment related to the hume pipe laying works in domestic construction industry. The main purpose of this study is to analyze technical and economical feasibility for the development of an automated hume concrete pipe laying system. The study then proposes low system alternatives, which are suitable for automating the existing hume concrete pipe laying works, and examines the technical feasibility of each alternative. This study also includes the result of economical feasibility analysis fer the automated hume concrete pipe laying works using the Stewart Pipe Manipulator proposed in this study.
The Precise Measurement of Pile Rebound and Penetration Movement using a High-Speed Line Scan Camera for the Safe foundation Work
Lim, Mee-Seub ; Yun, In-Sik ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1235~1245
When a construction company builds a high structure. many piles should be driven into the ground by a hammer whose weight is 7,000 in order to make the ground under the structure safe and strong. So, it is essential to determine whether a pile is penetrated into the ground enough to support the weight of the structure since ground characteristics at different locations are different each other. This paper proposes a visual measurement system for pile rebound and penetration movement including vibration using a high-speed line-scan camera and a specially designed mark to recognize two-dimensional motion parameters of the mark using only a line-scan camera. A mark stacking white and black right-angled triangles is used for the measurement, and movement information for vertical distance, horizontal distance and rotational angle is determined simultaneously. Especially, by adopting a line-scan CCD camera whose line rate is 20, the measurement performance of dynamic characteristics of the pile at impact instant is improved dramatically.
Development of Rail-transport Operation Control by Stability Evaluation of Railway Embankment under Rainfall
Kim, Hyun-Ki ; Kim, Jung-Ki ; Park, Young-Kon ; Shin, Min-Ho ; Kim, Soo-Sam ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1247~1255
Infiltration of rainfall causes railway embankment to be unstable and may result in failure. Basic relationship between the rainfall and stability of railway embankment are defined to analyze the stability of embankment by rainfall. A pressure plate test is also performed to obtain soil-water characteristic curve of unsaturated soils. Based on this curve, the variables in the shear strength function and permeability function are also defined These functions are used for the numerical model fur evaluation of railway embankments under rainfall. As comparing the model and case studies, the variation of shear strength, the degree of saturation and pore-water pressure for railway embankment during rainfall can be predicted and the safety factor of railway embankment can be expressed as the function of rainfall amount, namely rainfall index. Therefore, it is judged that this rainfall index can be a good tool for the rail-transport operation control.
Design of Shock-absorbing Reinforced Rail over the Joning Area of Bridge and Embankment
Yang, Sin-Chu ; Kang, Yun-Suk ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1257~1269
When a train is travelling along the bridge-approach joining area, dynamic behaviors of rail system and train are abruptly changed. The increasing impact force results in the reduced running stability of running train, damage of track components, and the increase of maintenance cost. The laying of additional rails except existing rails over the joining section may be a efficient method to reduce the impact loading. In this paper, a track/train interaction analytic method over the joining section is developed. Parametric studies for the support stiffness of track of bridge and embankment in each side, and for the type and length of reinforced rail are performed to obtain important design variables of the track with the reinforced rail track
Analysis of Corrections in the New Map Coordinates for Korea
Lee, Young-Jin ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1271~1279
The Global Positioning System(GPS) enables precise positioning anywhere on earth with a few millimeters, if an approprate reference frame and positioning infrastructure is in place. The proposed projections for Korea are intended to be GPS compatible, and therefore must be ITRF and the GRS80 ellipsoid. The effects of the unified TM projection for Korea, in this paper, have been compared to existing projections in relation to scale correction, area and convergence.
Automatic Mapping of Large Scale Ortho-Image by Using an Air-photograph and DEMs
Lee, Young-Jin ; Cha, Sang-Hun ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1281~1287
As the all position relation with features and objects in the ortho-image map are same with topographic maps, we can get lot of quantitative information and qualitative information with good visual effect. This study focused on the automatic ortho-photo image mapping with a single photograph and Digital Elevation Models(DEMs). The techniques of differential rectification we applied to produce the large-scale ortho-photo images, the results are analysed.
Research of Fine-Movement for wall on Dock According to Dewater
Kim, Yeun-Jun ; Park, Hyung-Keun ; Kim, Dong-Moon ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1289~1296
Safety management of large size construction has important meaning fairly by gravity of damage and difficulty of movement analysis. GPS or Total Station etc. is utilized extensively preservation administration of large size construction and displacement watch etc. the recent geodesy and measurement field. This research could analyze conduct of construction by pouring in and backwater after construction completion of shipbuilding yard Dock construction which outside effect acts greatly, and could know that is available to stability analysis data of shipbuilding yard Dock construction late using Total Station.
Establishment of the World Geodetic System in Major Airport Facilities for Global Navigation Satellite System
Choi, Yun-Soo ; Park, Byung-Uk ; Kim, Woong ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1297~1304
While ICAO(International Civilian Aviation Organization) is establishing FANS(Future Air Navigation Systems), it decides to designate locations data based on WGS-84, a worldwide uniformed standard of locations and recommends using of it to all countries. Accordingly, GPS surveying was conducted and baseline analysis processing using precise ephemerides was done to decide precise location of runways and facilities in the major civil airports. After all differences of baselines in sessions of GPS surveyed data and the characteristic of precise ephemerides used in long baseline processing were reviewed, coordinates of runways and major airport facilities in Korea were determined in accordance with international standard.
Feasibility Assessment on Producing Topographic Map Using High Resolution Satellite Image
Park, Byung-Uk ; Han, Sang-Deuk ; Ahn, Ki-Won ; Park, Hee-Ju ; Kim, Chung-Pyung ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1305~1315
The purpose of this study is to assess feasibility of digital mapping with IKONOS and Alternative System satellite images of Im spatial resolution. Mapping experiments for these images were conducted with technical analysis on positional accuracy, describable features, and possible mapping scale. Regarding Alternative System and IKONOS CARTERRA Precision images which were provided with rectified image type, head-up digitizing method was applied to generate digital map. Test results show that Alternative System image is available fer 2-dimensional revision of 1/10,000 topographic map, and IKONOS CARTERRA Precision image for 1/5,000 map. Digital photogrammetric workstation was used for stereoplotting of IKONOS CARTERRA Geo stereo images. IKONOS CARTERRA Geo with precise RPC is presumed to be possible for l/5,000 digital mapping in support of ensile survey.
A Study of Land Suitabililty Analysis by Neural Network Operation Applying Back-Propagation and Genetic Algorithm
Lim, Seung-Hyeon ; Lee, Geun-Sang ; Yang, Ok-Jin ; Cho, Gi-Sung ;
Journal of The Korean Society of Civil Engineers, volume 22, issue 6D, 2002, Pages 1317~1326
Recently, various Geo-Spatial Information is constructed rapidly and many GSIS spatial analysis tools are offered to users. But, current GSIS spatial analysis tools are not supplying new spatial analysis method. This paper examines a potential that conventional spatial overlay method could be replaced by Neural Network Operation in land suitability analysis. The Neural Network Operation can get many advantages by using the most suitable connection weight that is derived through Neural Network Learning Process. In the Neural Network Learning, we applied the most general Back Propagation Algorithm and Genetic Algorithm that are as kinds of stochastic search algorithm that combines survival of the fittest principle of genetic chromosome with computer. Programs are written by C language for Neural Network learning and Operation. And, we applied Neural Network Operation described to conduct land suitability analysis and to produce optimal future landuse pattern for Naju-city urban planning area and obtained similar results with practical site allocation examples.