Yoo K.-Y.,The Seoul Institute |
Yi S.,Daejeon Development Institute
Journal of Material Cycles and Waste Management | Year: 2014
For strategic planning of municipal solid waste management, the goals and action plans should be predicted and adopted after proper evaluations of the previous achievements. Thus, this long-term plans for past and future 10 years were evaluated and developed by completing the procedures for current and future status analysis, the evaluation of the 2nd Seoul Solid Waste Management Plan (SWMP), the development of the 3rd Seoul SWMP, expert forum, public hearing, and "Prior Environmental Review" of Korea Ministry of Environment. The greatest achievements during the 2nd Seoul SWMP (2002-2011) were good performances of waste treatment methods and their rates and greenhouse gas (GHG) saving effects. The 3rd Seoul SWMP induces three policy stances and six directions of waste management from 2012 to 2021 in Seoul. The project section in this plan is divided into six policy stages and eighteen action plants in whole. The goals of the 3rd plan are direct landfill 5.4 % and resource recovery 72 % by 2021. Optimization index analysis shows the increases of the index from 62.2 % in 2009 to 79.2 % in 2021. As well as optimization index analysis, further analysis results for public budget, GHG emissions, and job creation supports that the 3rd Seoul SWMP has been successfully planned. These findings suggest several courses of action for evaluation and development of long-term solid waste management plan in various countries. © 2014 Springer Japan.
Yoo K.-Y.,The Seoul Institute |
Yi S.,Daejeon Development Institute
Journal of Material Cycles and Waste Management | Year: 2015
For strategic planning of municipal solid waste management, the goals and action plans should be predicted and adopted after proper evaluations of the previous achievements. Thus, this long-term plans for past and future 10 years were evaluated and developed by completing the procedures for current and future status analysis, the evaluation of the 2nd Seoul Solid Waste Management Plan (SWMP), the development of the 3rd Seoul SWMP, expert forum, public hearing, and “Prior Environmental Review” of Korea Ministry of Environment. The greatest achievements during the 2nd Seoul SWMP (2002–2011) were good performances of waste treatment methods and their rates and greenhouse gas (GHG) saving effects. The 3rd Seoul SWMP induces three policy stances and six directions of waste management from 2012 to 2021 in Seoul. The project section in this plan is divided into six policy stages and eighteen action plants in whole. The goals of the 3rd plan are direct landfill 5.4 % and resource recovery 72 % by 2021. Optimization index analysis shows the increases of the index from 62.2 % in 2009 to 79.2 % in 2021. As well as optimization index analysis, further analysis results for public budget, GHG emissions, and job creation supports that the 3rd Seoul SWMP has been successfully planned. These findings suggest several courses of action for evaluation and development of long-term solid waste management plan in various countries. © 2014, Springer Japan.
Jeong J.-H.,Inha University |
Park J.-Y.,Inha University |
Park J.-Y.,Samsung |
Lim J.-S.,Inha University |
And 2 more authors.
Road Materials and Pavement Design | Year: 2014
This paper presents the results of an analysis of the interlayer friction characteristics between a concrete slab and various types of subbases, which are commonly used in concrete pavement construction. The interlayer friction characteristics were examined by conducting push-off tests on concrete slabs placed on top of lean concrete, crushed stone, or asphalt subbase, with and without separation membranes, under a range of saturated conditions. Throughout the tests, the friction resistance force and horizontal displacement, along with different types of subbases, were measured during the first application of a load, steady conditions, and saturated conditions. The measured interlayer friction resistance force and horizontal displacement after applying the first load showed results similar to other studies. To incorporate the test results into an analysis, a simple method was developed to estimate the maximum friction resistance force, initial slip displacement, and friction stiffness based on bilinearisation from the field-measured nonlinear friction resistance force, displacement relationship using the energy method. The finite element programs, ABAQUS and EverFE, were incorporated to analyse a concrete pavement. The interlayer friction behaviour was considered both with nonlinear and bilinear models in finite element programs and the interlayer friction characteristics were modelled with connector elements. The maximum tensile stress and horizontal displacement under temperature loading conditions were calculated using analytical models and the results were compared with field data. The results of the bilinear model based on the energy method matched the field data. © 2013 © 2013 Taylor & Francis.
Lim H.,The Seoul Institute |
Kim J.,Ajou University |
Potter C.,Korea University |
Bae W.,Chung - Ang University
Habitat International | Year: 2013
The definition of gentrification has expanded significantly since its initial application in the US and UK nearly 50 years ago to cover any process by which urban space is produced for more affluent users. Some authors are now questioning the utility of such a broad concept, arguing that it is virtually indistinguishable from the process of urban regeneration. Through an exploration of land use changes in Seoul's historical central business district in the wake of the widely touted Cheonggye Stream Restoration Project, this paper argues that urban regeneration and gentrification are irreducible views of the same process that concentrate on the interests of different stakeholders. Therefore, the paper concludes that the broad definition of gentrification is more useful since it focuses public debate on the ideological and ethical question of favoring some stakeholders' interests over those of others. © 2013.
Lee J.-S.,The Seoul Institute |
Nam J.,University of Seoul |
Lee S.-S.,Land and Housing Institute
International Journal of Sustainable Transportation | Year: 2014
This study examines the impacts of the built environment measures based on two geographic scales, i.e., traffic analysis zone and one quarter-mile buffer on individual mode choice in the Houston metropolitan area. It is confirmed that they have significant impacts on mode choice in varying degrees. The models including the buffer-based measures are more reasonable than those with conventional zone-based variables for both home-based work and other trips. Finally, the elasticity estimates suggest the built environments are undervalued in the conventional transportation practices. Both land use and transport pricing measures should be considered complementary to control the demand for driving. © 2014 Copyright Taylor and Francis Group, LLC.
Yoo C.,Korea University |
Jun C.,Korea University |
Park C.,The Seoul Institute
Journal of Hydrologic Engineering | Year: 2015
In this study, the Weiss approach to derive the CF (the conversion factor to convert the fixed-interval annual maximum rainfall into the true-interval one) was examined and revised to consider the rainfall temporal distribution. As examples, several rainfall temporal distribution models currently being used in the rainfall-runoff analysis, along with several simple distributions such as triangular or pentagonal, were considered to derive the CF. The resulting CFs were then compared with the CFs estimated by analyzing the observed rainfall data, both in Korea and in several other countries, such as the United States, the United Kingdom, Australia, and New Zealand. The findings from this study can be summarized as follows. First, the effect of the temporal distribution of rainfall is very significant on the estimation of the CF. The CF for the impulse rainfall was the smallest at 1.0, and that for the uniformly-distributed rainfall was the highest at 1.333. Second, the CFs derived for the temporal distribution models considered in this study were higher than the empirical CFs used worldwide. Finally, it was found that, among simple distributions and temporal distribution models analyzed in this study, the quadratic functional form and the Keifer and Chu method provide the most similar CF value to the empirical CF values used in many countries mentioned above. © 2015 American Society of Civil Engineers.
Ko J.,The Seoul Institute |
Shim J.-S.,Korea Transportation Safety Authority
International Journal of Sustainable Transportation | Year: 2016
As climate change and severe air pollution become life-threatening, numerous attempts have been made to encourage the use of electric vehicles as alternative fuel vehicles. One such proposal is the introduction of electric taxis supported by the battery exchange station (BES) system. This article presents the framework on how the BESs should be located in a city considering the demand and practical constraints using Seoul, South Korea, as the case study. As a solution approach, p-median models are applied for 25 candidate locations and modeling results are presented and interpreted. © 2016 Taylor & Francis Group, LLC.
Kim D.,Transportation Institute |
Ko J.,The Seoul Institute |
Park Y.,Korea Rural Economic Institute
Transportation Research Part D: Transport and Environment | Year: 2015
There are growing concerns on traffic congestion, climate change and parking problems in major cities. Faced with these concerns, policy makers have sought sustainable transportation options including electric vehicle sharing programs (EVSPs). The city of Seoul with 10 million people also has recently launched an EVSP to provide citizens with an alternative travel mode. This study attempts to explore factors affecting the EVSP participants' attitudes about car ownership and program participation. To do this, a web-based survey was conducted for the participants of the Seoul EVSP, asking their satisfaction levels for the components of the EVSP. Then, using 533 responses of 1772 EVSP members (a response rate of 30%), ordered probit models were developed for three types of attitudes: (1) willingness to dispose of a car, (2) willingness to purchase an EV and (3) willingness to continue participating in the EVSP. The estimated models suggested that participants' social and economic perspectives were the most important factors affecting the participants' attitudes. In addition, the attitudes varied depending on personal characteristics such as gender, age and income. Although this study was conducted in the early stage of an EVSP, its results are expected to provide insights into a better EVSP design. © 2015 Elsevier Ltd.
Lee J.-S.,The Seoul Institute |
Lee S.K.,Dongshin University |
Jun J.,Kangwon National University
Journal of Urban Planning and Development | Year: 2014
This paper examines the causal connections between land use and household driving distance in the Houston-Galveston metropolitan area by introducing the directed acyclic graphs. It is found that population density and roadway design measure have direct causal relationships with total household driving distance. In terms of elasticity estimates of driving distance with respect to land-use measures, the impacts of land use on household driving distance are found to be overrated in the conventional regression analyses compared with the results based on the directed acyclic graphs. Urban development and design strategies can play a significant role in reducing household driving distance, which then helps moderate air pollution and climate change. © 2014 American Society of Civil Engineers.
Huh T.,The Seoul Institute
Journal of Environmental Policy and Planning | Year: 2014
This paper explores the dynamics and discourse of governance for sustainable development (SD) in the formulation of the National Strategy for SD and the Framework Act on SD in South Korea. It reveals that accepted conventions regarding the relationship between governance and SD are ill-founded and that the dynamics and process of governance is in fact imbued with contradictions and tensions in the Korean context. In particular, this article underlines the two underlying causes which bring about the tension: the lack of common understanding between participants on the substantial values of SD and the lack of agreement as to the extent of power or authority which should be given to governance. The tension is differently shown as the 'procedure orientation' and 'substance orientation', based on the divergent assumptions between governance and representative democracy, different governance discourse and environmental discourse. This paper argues that the formulation process of the National Strategy and Framework Act failed to create a 'convergent zone' (the field of consensus) in terms of the governance arrangements (dynamics) and the common recognition of participants (discourse) where most of the actors (not only 'procedure-oriented' but 'substance-oriented') could agree with. © 2013 © 2013 Taylor & Francis.