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Challenges, Volume 3, Issue 1 (June 2012) – 3 articles , Pages 1-69

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454 KiB  
Review
Methodology for Assessment and Optimization of Industrial Eco-Systems
by Shyamal Gondkar, Sivakumar Sreeramagiri and Edwin Zondervan
Challenges 2012, 3(1), 49-69; https://doi.org/10.3390/challe3010049 - 19 Jun 2012
Cited by 1 | Viewed by 6919
Abstract
There is an emerging trend in evaluating industrial activities using principles of industrial ecology because of the emphasis on sustainability initiatives by major process industries. Attention has also been targeted at developing planned industrial ecosystems (IEs) across the globe. We point out the [...] Read more.
There is an emerging trend in evaluating industrial activities using principles of industrial ecology because of the emphasis on sustainability initiatives by major process industries. Attention has also been targeted at developing planned industrial ecosystems (IEs) across the globe. We point out the current state-of-the art in this exciting discipline and subsequently identify the challenges that have not been encountered by the scientific community yet. Ecological Input Output Analysis (EIOA) may be considered as an “all-inclusive model” for the assessment of an IE because of its ability to capture the economic, environmental, and societal behavior of an IE. It could also be utilized to illustrate the detailed inter-relationships among the entities of an IE. Optimization of a fully integrated IE using conventional multi-objective optimization techniques would be too complex. For such multi-objective optimization problems, Hierarchical-Pareto optimization discussed in the literature has shown promise, but there is a need to establish a methodology to assess and/or improve the robustness of an IE using such techniques. Full article
(This article belongs to the Special Issue Challenges in Chemical Processes)
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1047 KiB  
Article
Wetland Loss and Research Orientation
by Xi Chen, Mark Bain, Patrick J. Sullivan and Ziyan Wang
Challenges 2012, 3(1), 43-48; https://doi.org/10.3390/challe3010043 - 12 Jun 2012
Cited by 1 | Viewed by 6579
Abstract
The literature analysis method used in this paper outlines variations in research topics. We tested whether research on wetlands is topic-centered, comparative of different wetland classes, or aimed at wetland loss. We analyzed research papers to identify clusters of research activity and interpreted [...] Read more.
The literature analysis method used in this paper outlines variations in research topics. We tested whether research on wetlands is topic-centered, comparative of different wetland classes, or aimed at wetland loss. We analyzed research papers to identify clusters of research activity and interpreted these clusters relative to wetland function and type. Furthermore, a case study on 61 papers was conducted in order to find a critical path of wetland loss induced by different causes. From this case study, it was determined that agriculture is regarded as a root cause of wetland loss. Full article
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977 KiB  
Article
Eco-Polycentric Urban Systems: An Ecological Region Perspective for Network Cities
by André Botequilha-Leitão
Challenges 2012, 3(1), 1-42; https://doi.org/10.3390/challe3010001 - 03 Apr 2012
Cited by 9 | Viewed by 10040
Abstract
The research presented in this paper is a work in progress. It provides linkages between the author’s earlier research under the sustainable land planning framework (SLP) and emergent ideas and planning and design strategies, centered on the (landscape) ecological dimension of cities’ sustainability. [...] Read more.
The research presented in this paper is a work in progress. It provides linkages between the author’s earlier research under the sustainable land planning framework (SLP) and emergent ideas and planning and design strategies, centered on the (landscape) ecological dimension of cities’ sustainability. It reviews several concepts, paradigms, and metaphors that have been emerging during the last decade, which can contribute to expand our vision on city planning and design. Among other issues, city form—monocentric, polycentric, and diffused—is discussed. The hypothesis set forth is that cities can improve the pathway to sustainability by adopting intermediate, network urban forms such as polycentric urban systems (PUS) under a broader vision (as compared to the current paradigm), to make way to urban ecological regions. It discusses how both the principles of SLP and those emergent ideas can contribute to integrate PUS with their functional hinterland, adopting an ecosystemic viewpoint of cities. It proposes to redirect the current dominant economic focus of PUS to include all of the other functions that are essential to urbanites, such as production (including the 3Rs), recreation, and ecology in a balanced way. Landscape ecology principles are combined with complexity science in order to deal with uncertainty to improve regional systems’ resilience. Cooperation in its multiple forms is seen as a fundamental social, but also economic process contributing to the urban network functioning, including its evolving capabilities for self-organization and adaptation. Full article
(This article belongs to the Special Issue Challenges in City Design: Realize the Value of Cities)
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