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- Hagson, Anders, 1950, et al.
(författare)
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Vad hindrar respektive möjliggör tät och blandad stadsutveckling?
- 2015
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Diskussionen om framtidens hållbara och mer resursvänliga samhälle tar ofta sikte på den täta och funktionsblandade staden. Men om många kan vara överens om principerna, så visar sig den så kallade blandstaden svår att definiera mer precist. Vad innebär en tät och blandad stad, och hur ser förutsättningarna ut för att genomföra den?
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| 2. |
- Andersson, Claes, 1973, et al.
(författare)
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The urban economy as a scale-free network.
- 2003
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Ingår i: Physical Review E. - 2470-0045 .- 2470-0053. ; 68, s. 036124-
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Tidskriftsartikel (refereegranskat)abstract
- We present empirical evidence that land values are scale free and introduce a network model that reproduces the observations. The network approach to urban modeling is based on the assumption that the market dynamics that generates land values can be represented as a growing scale-free network. Our results suggest that the network properties of trade between specialized activities cause land values, and likely also other observables such as population, to be power-law distributed. In addition to being an attractive avenue for further analytical inquiry, the network representation is also applicable to empirical data and is thereby attractive for predictive modeling.
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| 3. |
- Andersson, Claes, 1973, et al.
(författare)
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The urban economy as a scale-free network
- 2003
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Ingår i: Physica A: Statistical Mechanics and its Applications. - 0378-4371. ; 345:1, s. 227-244
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Tidskriftsartikel (refereegranskat)abstract
- AbstractPower laws in socioeconomic systems are generally explained as being generated by multiplicative growth of aggregate objects. In this paper we formulate a model of geographic activity distribution with spatial correlations on the level of land lots where multiplicative growth is assumed to be dominant but not exclusive. The purpose is to retain the explanatory power of earlier models due to Simon, Gibrat and others while attaining some additional properties that are attractive for both empirical and modelling purposes. In this sense, the model presented here is a combination of the two factors that have been identified as central to urban evolution but rarely appear unified in the same model: transportation costs and multiplicative growth. The model is an elaboration of a previously reported complex network model of geographical land value evolution. We reproduce statistical properties of an empirical geographical distribution of land values on multiple hierarchical levels: land value per unit area, cluster areas, aggregated land value per cluster and cluster area/perimeter ratios. It is found that transportation effects are not strong enough to disturb the power law distribution of land values per unit area but strong enough to sort nodes to generate a new set of power laws on a higher level of aggregation. The main hypothesis is that all these relations can be understood as consequences of an underlying growing scale-free network of geographic economic interdependencies.
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| 7. |
- Hagson, Anders, 1950, et al.
(författare)
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Redefining Urban Development Strategies for Effective and Efficient Future Mobility Solutions
- 2018
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The main question of this pre-study is if there is a coherence between future sustainable urban development and urban transportation models. The current rapid development of new technologies will result in new innovative transportation models. To what extent are they compatible with urban models? The population and urban growth change urban mobility in space and stress the word infrastructure. Urban transport is one of the major challenges on a local, regional and national level, where decision and planning processes in cities are extremely complex. A polycentric model of growth to avoid pressures on the urban centres, has been accompanied by developing transport networks along existing corridors. The problems however remain: shortage of land, growing traffic congestion, pollution, etc. This aims to define new innovative urban transport solutions with a larger flexibility in response to the growing dynamic urban development. Is there a paradox between urban development along existing corridors and the idea of flexibility of mobility? New technologies and new transportation modes are already accessible. However, alternative city structures for new transportation system models are not widely discussed in the city development strategies. This pre-study is based in Gothenburg as a case city. Research outputs are presented as following: I. Historical perspective. Description of how urban forms and land use changes as a consequence of new transportation technologies; II. How will different new innovative transportation systems (i.e. private, mixed, and public) affect a) accessibility to destinations for different socio-economic groups b) distribution of goods?
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| 8. |
- Lundgren Alm, Elisabet, 1967, et al.
(författare)
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Grönstrukturens synliggörande; en förutsättning för integration av kunskaper om grönstrukturen i stadsplaneringen
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- This is the final report from the project ”Green Structure in urban design and planning” within the research programme ”Sustainable urban development and Urban Structures” (SUUS). The green structure is vital to a sustainable urban development. It constitutes a large part of the urban landscape and it plays important roles in relation to the cultural, social and technical urban structures. Further, the urban dwellers are engaged in the outdoor environment in a concrete and emotional way, which can be seen a potential for engagement supporting local participation in the planning processes. Finally, urban greenery constitutes an important link between urban dwellers and the nature, a link, which is often very vague, as our fundamental need for the ecosystem has become abstract and almost invisible to us. Thus, it is very relevant to state that urban development and planning should be characterized by competent strategies in order to safeguard the green resources. However, the lack of such strategies is an important point of departure for this project. The searching for ways to understand and methods to integrate green structure-knowledge into urban planning aiming at sustainable urban development is thus a main objective here.The research problem is the lack of methods to express and maintain the qualitative significance of green structure in relation to urban design and planning. Following this, the main focus for this project is the critical discussion of challenges and possibilities of the green structure planning, reflecting the issue’s complexity and the need to find localized and situation-adapted strategies. Thus, the research objectives are:– How does contemporary green planning work?– In what ways can knowledge about the multifunctional potential of greenstructure be visualised and useful in local situations?– In what ways can geographical information systems (GIS) be used to createefficient tools supporting communication about this multifunctional potential?The main conclusion is that the lack of strategies for the safeguard and maintaining of green resources is related to the inability of physical planning to visualize and make use of green qualities at different planning levels and in different contexts. Visualisation is thus a key to the realisation of such strategies. This project has dealt with five aspects of the visualisation and utilization of green qualities, here formulated as challenges to urban design and planning: (1) to open up for new levels in physical planning, (2) to see the green structure as a whole, no matter the ownership, (3) to avoid getting caught in sector division but to connect different urban planning issues in planning across sectors, (4) to take care of experience-based knowledge from different actors, and (5) to pay attention to the cultural aspects affecting people’s use of the green structure.Keywords: green structure, sustainable urban development, urban design and planning, green structure planning.
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| 9. |
- Stahre Wästberg, Beata, 1974, et al.
(författare)
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How to Visualize the Invisible Simulating Air Pollution Dispersions in a 3D City Model
- 2013
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Ingår i: 13th International Conference on Computers in Urban Planning and Urban Management, CUMPUM 2013; Utrecht; Netherlands; 2 July 2013 through 5 July 2013. ; 2013, s. 1-4
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This is a work in progress on how to visualize air pollution dispersion in 3D from a street perspective. Invisible environmental factors, such as air pollution, are hard to present in a comprehensible way, and thus difficult to grasp. Consequently these questions often get low priority in urban planning processes. In order to create a better understanding for e.g. air pollution at street level, a visual concept for 3D-city models needs to be developed, where a walk through perspective at street level with pollution levels is included. An urban area in central Gothenburg (Fig 1A,B) is studied regarding the quality of air following changes in the built environment. The project explores different ways to represent environmental factors in 3D-city models. Spreading calculations for particles are carried out, based on the plan for new buildings in the area. For comparison, a scenario of the current situation are produced, based on existing calculations for emissions from traffic and harbour activities. Finally, the air pollution visualization will be integrated in the 3D city model of Gothenburg.
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| 10. |
- Stenborg, Per, 1962, et al.
(författare)
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Digital Time-Travels: Communicating Historical GIS and TGIS-Information in Museum Environments
- 2009
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Ingår i: GIS in the Humanities and Social Sciences International Conference — Innovating — Collaborating — Sharing, October 7-9 2009, Academica Sinica, Taipei. Proceedings. ; , s. 365-380
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Konferensbidrag (refereegranskat)abstract
- The Digital Time Travels Project is an interdisciplinary, collaborative initiative which seeks to develop and evaluate new methods for the distribution and representation of digital archaeological information to the public. Toward that end, the project has developed two tools for museum and online use: The first is a physical, tactile model of the Göta Älv river valley in western Sweden, which has been combined with an overhead projector that project a TGIS-based animation of the valleys natural and cultural landscape development from roughly 12500 BP to the present onto the surface of the model. The model is designed to be touched, with various components such as archaeological sites, shoreline locations, and land elevation changes represented by different textures which are also intended to make the model more accessible to the visually impaired. Secondly, a computer application which uses GIS data, 3D scans of archaeological objects, 3D reconstructions and animations of past sites and landscapes to present information about the past in an interactive, multilingual format via touch screen interfaces as well as on the World Wide Web (web). Both the museum exhibit and the web application are under evaluation in order to determine how they are used and how to improve them. In this presentation we outline the development of these tools, evaluate their use, and discuss future plans for their improvement. The museum exhibition opened at Lödöse Museum, in the center of the Göta River Valley on June 13th 2009, and a web version of the computer application will later become available through the project website.
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