전기집진기에서 분진의 입자분포와 광폭집진면이 유효이동속도에 미치는 영향

고준호(Joon Ho Ko),임선기(Son Ki Ihm) 한국화학공학회 1995 화학공학의이론과응용 Vol.1 No.2

학술발표회 초록 : ( 분체공학 (1) ) ; Wire - Plate 형 전기집진기에서 하전공정과 집진효율간의 상호연관성에 관한 연구

고준호(Joon Ho Ko),임선기(Son Ki Ihm) 한국화학공학회 1994 추계학술발표회 Vol.- No.-

서울시 지하철체계 분석을 통한 지역별 최적 접근수단 모색

고준호 ( Joon Ho Ko ),이세희 ( Se Hee Lee ) 서울시정개발연구원 2008 연구보고서 Vol.2008 No.52

The subway system is a critical element of the urban transportation system in Seoul, covering about 35% of the total trips made in Seoul. However, it should be noted that the subway mode share has stayed at the same level even after the bus reform implemented in 2004, which incurred an increase of bus mode share from 26.0% to 27.6%. This situation implies that various efforts, including the establishment of an efficient access system to subway stations, should be made to increase the subway ridership. This study first makes an effort to identify the factors affecting the subway ridership based on regression analyses. In the analyses, district (Seoul is composed of 25 districts) was utilized as a spatial unit or a data collection unit. In doing so, the 25 districts were compared in terms of the subway modes share and subway ridership influencing factors, including the station catchment area ratio and the degree of connectivity of the transit stations within a district. In addition, access trip characteristics were identified on a district level. An interesting finding concerning the access modes is that the trunk line buses are as much used as local buses as an access mode. Local buses have been considered as a major access mode, together with walking, to subway stations. The bus reform in 2004, which introduced an unified transit fare scheme relying on only travelled distance, thus free transfer, may render the trunk line bus an another important access mode to stations. Before the bus reform, the fare of local buses was cheaper than that of trunk line buses, thus citizens preferred to using local buses as an access mode to stations. The estimated regression model with a determination coefficient of 0.79 is composed of four significant (at a significance level of 0.05) explanatory variables: degree of connectivity, ratio of station catchment area, number of local bus lines, and travel time of trunk line buses to stations. Another model with only two variables, degree of connectivity and ratio of station catchment area, showed, however, a determination coefficient of 0.70, implying these two variables can explain a significant portion of the variation associated with the subway mode share on a district level. This finding suggests that subway infra provision is a critical element as a way of attracting more passengers. This study also noted that an efficient access system should be placed as an important element that increases ridership, as suggested by the variables such as number of local bus lines and travel time of trunk line buses to stations which were identified as significant variables in the regression model. Policy makers should be advised that the subway service improvement can be achieved by obtaining adequate supports from the bus service network as well as walking environment surrounding the path to and from subway stations.

학술발표회 초록 ( 분체공학 (Ⅱ) ) : Wire - duct 전기집진기에서 전기장 특성 및 집진효율의 해석

고준호(Joon Ho Ko),임선기(Son Ki Ihm) 한국화학공학회 1994 춘계학술발표회 Vol.- No.-

그린카 스마트시티 구현을 위한 기초연구

고준호 ( Joon Ho Ko ),김태형 ( Tae Hyoung Gim ),이세희 ( Se Hee Lee ),심진섭 ( Jin Seop Shim ) 서울시정개발연구원 2011 연구보고서 Vol.2011 No.14

As the Seoul Metropolitan Government (8MG) is trying to encourage the use of electric vehicles as the Green Car Smart City declaration, it is necessary to develop an electric vehicle (EV) delivery plan considering Seoul`s transportation characteristics. This study aims to identify strategies and issues associated with the introduction of various types of EVs based on transportation data In addition, this study proposes organizational frameworks for fulfilling the plan and estimates benefits such as emissions reduction and energy saving and costs for the plan implementation. Although the SMG set up a plan for delivering mire than 20,000 private EVs among the total 40,000 EVs, the encouragement of the private EV use was found to be significantly difficult because of high EV prices and short of charging infrastructure. Meanx4tile, taxies and buses were found to be less difficult and more economical because of their long travel distances5 fixed route operations (for buses) and easier installment of charging stations in depot. For EV taxies, pilot projects may be implemented cooperating with large taxi companies with mare than 100 fleet, The location of rapid charging stations may be determined depending on the amount of taxi traffic volumes. In the case of IN buses, buses operated on rather short routes5 for example less than 20km can be the target. In addition, some portions of niitorcycles and rental cars may be converted to EVs. For private EVs, 3,500 EVs may be on the road by mid 2013, ``which include 2,200 new cam annually, 720 company fleet vehicles, 150 rental cars and 390 car sharing fleet. Concerning rapid charging thciities, 80 charging posts located at 40 different places may be provided in order to ease the EV drivers`` anxiety. Candidate locations would be district offices, near the ramps of inner circular expressway, roadways crossing the city boundary and Hangang bridges. Besides these, 20 more fast charging posts may be installed in 10 depols of company taxies. For public standard chargers, several public facilities such as public parking lots, civic centers and libraries would be candidate locations. In the private sector, large buildings with a floor area of more than 30,000m2 would be the target for the installment of chargers. The pace of the charging facility provision should be coupled with the nunfrr of EV purchases. The proposed ratio of the nunters of EVs to public chargers are 5:1 until mid 2013, and alter then the ratio may be adjusted to 8:1. These plans would be implemented by public-private partnership where the SMG may provide administrative and financial supports. As an active measure; the SMG may take the role to lead the plans, directly managing and controlling the EVs by selling up an WV center. The analysis on expected benefits and costs for the dep1oynnt of 40,000 EVs indicated that Seoul may see greater benefits of emissions reduction and fuel savings than the cost incurred by EV purchase subsidy and infrastructure construction. In more detail, the analyses suggested that B/C ratio for the four vehicle types (private car, bus, taxi, and motorcycle) would range between 0.90 and 1.01 depending on electricity prices if the benefits last five years. If it lasts seven years, B/C ratio would range between 1.26 and 1.41. Considering that the B/C ratio of private WV sector resulted in only 0.49 0.77, the public sector EVs such as taxies and buses would generate great benefits. Meanwhile, the low B/C ratio for the private EVs implies that government should lead the promotion of EV uses in the private sector for vitalizing related industries and spreading environment friendly transportation modes.

연구발표초록 ( 공업화학 (Ⅱ) ) : 광섬유 모제 제조에 관한 모델링과 그의 해석

고준호(Joon Ho Ko),김교선(Kyo Seon Kim),임선기(Son Ki Ihm) 한국화학공학회 1990 추계학술발표회 Vol.- No.-

서울시 교통수요 및 교통류 관리방안 연구

고준호 ( Joon Ho Ko ),조영재 ( Young Jae Cho ) 서울시정개발연구원 2008 연구보고서 Vol.2008 No.13

Increasing demand for the vehicle use coupled with the increasing vehicle ownership in the Seoul Metropolitan area requires more efficient travel demand management (TDM) strategies toward an optimal use of roadway facilities. In particular, the recent high-rising oil price stresses the importance of the private vehicle trip conversion to alternative modes. This study identifies that future TDM strategies should focus on the reduction of vehicle trip distance by applying value pricing and customized approaches tailored to the target groups and areas. This study recognizes that the distance-based fee system such as mileage-based insurance program, mileage-based vehicle tax, and mileage-based congestion charging would be an alternative to the current transportation policies. In fact, the distance-based system can provide an extra incentive to drive less and opportunities to save transportation costs for the drivers who intend to reduce their car reliance. Thus, the distance-based system can be a more equitable and efficient approach generating social benefits such as reduced emissions and lowered congestion levels. The three distance-based fee systems are reviewed and the effectiveness of the distance-based congestion charging system for urban expressways is evaluated. For the evaluation, two freeways, Olympic Expressway and Gang-byun-buk-ro are selected for the implementable target corridors as the two corridors are heavily congested routes running east-west along the Han River. The evaluation results indicate that an introduction of the mileage-based congestion charging system would reduce traffic demand for the corridors by 12.6%. In addition, travel speed is estimated to increase by more than 20%, little adversely affecting the whole roadway network in Seoul. These achievements from the new policy appear to be crucial in that the corridors should provide an enhanced mobility service to drivers. This study suggests that the distance-based user fee system should be a viable approach that can mitigate the external effects from traffic congestion. In particular, the system seems superior in that it is equitable and efficient to fix traveller`s behavior encouraging an use of transportation resources in an efficient manner. Future studies should identify any obstacles in adopting such policies and at the same time solutions to overcome the obstacles.

변형된 IPA 분석기법을 활용한 도시부 도로 서비스 질 평가

김태호,고준호,원제무,Kim, Tae-Ho,Ko, Joon-Ho,Won, Jai-Mu 한국도로학회 2008 한국도로학회논문집 Vol.10 No.2

The quality of service on urban roadways have been evaluated mainly based on such quantitative measures as travel speed and delay. However, in addition to the quantitative aspects, drivers traveling on urban roadways are subject to be influenced by qualitative measures such as aesthetic aspects of the roadway and other drivers' violation of traffic laws. Based on this notion, this study attempts to identify roadway service quality indices, considering both qualitative and quantitative aspects and evaluate the quality of service using the modified Importance-Performance Analysis (IPA), a technique often applied in the field of marketing. The modified IPA is proposed in this study as a way to evaluate the service quality, reflecting the relative performance between study areas and performance indices. A case study is implemented over the Gangnam and Gangbuk areas in Seoul, resulting in identifying the items needed to be improved for each study area. 현재 도시부 도로에 대한 서비스 수준 평가는 통행속도, 지체 등과 같은 정량적인 부분만을 고려하였다. 하지만 도시부 도로를 이용하는 운전자들은 정량적인 부분이외에도 도로의 청결, 타운전자의 법규위반 등의 정성적인 측면에서도 영향을 받고 있는 것이 현실이다. 이에 본 연구에서는 정량적인 부분과 정성적인 부분을 함께 고려하여 평가지표를 도출하고, 서비스 측면의 개선사항 도출시 주로 경영분야에서 사용되고 있는 Importance-Performance Analysis (IPA) 기법을 변형하여 사용하였다. 본 연구에서 제안된 변형된 IPA 분석기법은 분석대상 및 항목간 상대적 수준을 반영하여 서비스 수준이 평가될 수 있도록 구성되어 있다. 사례분석 지역으로 서울시 강남 3개구, 강북 3개구를 선정하여 도시부 도로의 서비스 질 평가가 수행되었으며, 변형된 IPA 평가를 토대로 도로 서비스 질 향상을 위한 지역별 개선항목을 도출하였다.

운전능력에 연관된 인적특성의 연령 임계점 연구

김태호 ( Tae Ho Kim ),고준호 ( Joon Ho Ko ),원제무 ( Jai Mu Won ),허억 ( Ec Hu ) 한국안전학회 2008 한국안전학회지 Vol.23 No.3

도시고속도로 Road Pricing 도입 방안 및 효과분석 연구

안기정 ( Ki Jung Ahn ),고준호 ( Joon Ho Ko ),이종덕 ( Jong Deok Lee ) 서울시정개발연구원 2009 연구보고서 Vol.2009 No.20

Introduction of road pricing on urban highway in Seoul is urgently needed from reasons of low service quality, financing operating and maintenance costs, and enhancement in efficiency by correcting inefficient allocation of traffic volume. However introduction of it is very difficult due to the practical and political reasons. In the study, we investigate the way to introduce the road pricing by studying the cases of success and failure of foreign cities and analyze the effect of road pricing on urban highways in Seoul. By investigating the case of foreign cities such as ALS and ERP in Singapore, Tolling in Oslo, Bergen an Tronheim, CCS in London, Value Pricing on SR-91 Express Way and I-15 Interstate Highway, and Ecopass in Milan, we found that consensus among citizens on bad road conditions, confirmative promotion on road pricing, programs including expansion of mass transportation, feedback of opinions of citizens on road pricing program, support from contral government, and leadership of leader who makes decision on road pricing are greatly needed. Lack of these condition might lead to the failure of road pricing, which is shown by the cases of Dennis Package in Stockholm, Environment Charging Scheme in London, ERP in Hongkong, Congestion Charge in Edinburgh and Manchester, and Randstad in Netherland. To introduce the road pricing successfully in urban highway in Seoul, amendment of related laws and regulation, promotion of necessity of road pricing on the reason from environment as well as congestion delay, and support from central government could be required. By investigating the effect of road pricing, we found that road pricing would lead to the improvement of service of urban highway, full coverage of maintenance and operating cost on urban highway. The remaining toll revenue might be used for subsidy for financing the deficit in public transport operation and improvement on service of public transports.