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1 – 10 of 481This study draws on recent actor-network theory (ANT) literature to provide a nuanced understanding of the effect of time on activity networks in urban spaces. It investigates the…
Abstract
Purpose
This study draws on recent actor-network theory (ANT) literature to provide a nuanced understanding of the effect of time on activity networks in urban spaces. It investigates the role of time in multiplying these networks and producing urban change, which is limited in similar ANT-related research.
Design/methodology/approach
This ethnographic study of a cul-de-sac square within a housing project in the suburb of Dahiyat Al-Hussein in Amman, Jordan, documents the changes in its activity networks when comparing the 1990s with 2019. Data were collected through interviews and site observations covering the two time periods to investigate the different activities that occurred constantly over time, which reflect the temporal network stabilisation within the square.
Findings
The findings demonstrate the profound effect time has on the stability of activity networks related to playing, observing, walking, vending and their interrelations. Their overlaps and conflicts with each other and with other networks in the space were observed. Unpacking the stability of activity networks and their interrelations demonstrates the change in their actor relations and temporalities over time. This is significant in understanding urban change.
Originality/value
The study investigates the importance of time in recognising and extending the multiplicity of urban activities, which suggests new ways of understanding urban change. This exploration highlights new possibilities for creating more adaptable spaces according to residents' long-term needs.
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Over the past 15 years, there has been a growing interest in the potential of movement-based artistic practices for exploring aspects of the urban experience. As a visual artist…
Abstract
Over the past 15 years, there has been a growing interest in the potential of movement-based artistic practices for exploring aspects of the urban experience. As a visual artist and a geographer, I have become increasingly interested in how the movement-based practice of performative walking might be used as an ‘inventive method’ for examining and understanding aspects of how we live in cities.
In this chapter, I draw upon the insights gained from four recent projects to explore performative walking's potential as a mode of enquiry. These projects were conducted in and around Edinburgh, Scotland, between 2016 and 2019. Each project was designed to create an affective ‘friction’ and enhance participants' sensitivity to space and place through practices such as hyper-slow walking, repetitive walks, walking in the dark and creating spaces for imaginary games. The projects demonstrated to me that performative walking can help uncover emotional and hidden geographies by combining, and bringing to bear upon these spaces, the visual, sensory, historical, mythical, remembered, personal, projected and, importantly, the imagined.
I conclude that performative walking is a valuable form of research which should be given parity with other forms of urban inquiry, such as public consultations, in dialogues about our future cities. Furthermore, I propose that attempts should be made by those interested in developing ‘inventive’ methods in urban inquiry, including those interested in developing creative geographies, to evaluate more systematically the contribution that performative walking might make to ways in which we understand, and develop, our cities.
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David O'Brien, Sandra Carrasco and Kim Dovey
This paper analyses the incremental housing process developed at Villa Verde, a housing project designed by the Chilean architecture firm Elemental, whose director Alejandro…
Abstract
Purpose
This paper analyses the incremental housing process developed at Villa Verde, a housing project designed by the Chilean architecture firm Elemental, whose director Alejandro Aravena received the Pritzker Prize in 2016. This project is conceived within a social housing framework and designed as an affordable “half-house” to be incrementally extended by the owners.
Design/methodology/approach
This paper is based on research undertaken in August 2017 with data obtained through site surveys, trace analysis, interviews with 32 residents and photographic surveys. The researchers mapped the modifications made by all households at Villa Verde in the four years after occupation.
Findings
The strategy of designing a formal framework for informal additions has generally been successful with most houses undergoing substantial expansion to a high standard of construction. The paper raises concerns regarding the settlement's urban design, response to local climate and the quality of shared open space. We also find evidence of over-development as informal additions extend across front and rear yards that are in some cases fully enclosed.
Originality/value
This project is critiqued within the context of a long series of architectural attempts to harness the productive capacities of self-help housing. Villa Verde engages the freedom to build in a self-organised manner within a formal framework. But what will stop these additions from escalating into a “slum”?
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Beatriz C. Maturana and Ralph Horne
Social integration is an important goal of contemporary urban policy in Chile. Using the concept of conviviality understood as the “art of living in community” (Esteva, 2012)…
Abstract
Social integration is an important goal of contemporary urban policy in Chile. Using the concept of conviviality understood as the “art of living in community” (Esteva, 2012), this work analyses two socially integrated housing developments in Chile. This paper argues that materially interspersing different socioeconomic groups within housing developments is insufficient on its own to achieve the objectives of social integration espoused in the national urban policy. In particular, it leaves aside community and cultural processes and therefore neglects considerations of inclusion, equity, and conviviality. Furthermore, it is insufficient on its own in meeting sustainable cities and quality of life objectives of the National Urban Development Policy. As a result, we raise critical questions for the implementation of national policy objectives to combat the segregation of cities. The concept of assessing conviviality is proposed as a means to further understand social integration.
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Informal dwellings describe makeshift lodgings made from temporary materials, such as plastic, corrugated iron, sheeting, packing cases, or wood. These units allow low-income…
Abstract
Purpose
Informal dwellings describe makeshift lodgings made from temporary materials, such as plastic, corrugated iron, sheeting, packing cases, or wood. These units allow low-income groups to informally occupy land and create their habitable space in a phased manner. This article focuses on elements of the urban morphology, such as density, accessibility, and operating assortment of informally built areas in the southern region of Montenegro.
Design/methodology/approach
The author examines the urban morphologies of four urban areas, whose informality is traditionally viewed as markers of decline and despair. Using observations, questionnaires, and semi-structured interviews, the investigator maps dwellings in Ulcinj, Budva, Tivat, and Herceg Novi neighbourhoods. The researcher interrogated participants about land distribution during the construction of sheds, buildings' outline and orientation toward the street, and activities performed in their dwellings, such as living, working, and accommodating relatives and guests. This methodology tests the hypothesis, formulated as a deeper understanding of urban morphology for examining the interweaving of informally built settlements with the rest of the city.
Findings
A cartographic investigation is used to reframe customary rights of low-income populations to land inclusion and their place in the city. The results clearly show that the location and lifestyle are designed to obfuscate the vulnerable populations from the public view, disconnected from policymaking, and ignored by urban planning projects. However, the interviewees' destinations orientation away from the downtowns represents the possibility of reconfiguring existing urban planning practices. For creating alternative urbanisation, the orientation of less visible neighbourhoods presents a model for building regulations embedded in social forces and cultural habits of all social and ethnic groups.
Research limitations/implications
This study did not address the implementation of social hosing policies and the logistical limitations of realising them by the local and national governments. During firework, the author encountered dwellers outside four studied low-income neighbourhoods in the south region of Montenegro. Mapping morphological elements of these generally small clusters of informal built units are left for future research. Future studies could examine how informality is performed in Montenegro by moderate and high-income groups as an assemblage of different power relationships and urban practices.
Practical implications
The argument is based on counter urbanism as the orientation and destination of less visible neighbourhoods for creating building regulations embedded in social forces and cultural habits of all social and ethnic groups. This study showed that the urban morphology of informality in the coastal cities of Montenegro lays the ground for alternative urban planning practices based on the different interconnection of districts. The outcome is a strong link between different social and ethical groups through self-building practices.
Social implications
In coastal cities of Montenegro, Roma, Ashkali, and Egyptian live with other low-income groups in unsanitary settlements characterised by poor living conditions, low-quality illegally built housing, no plumbing or sewage systems, and overcrowded urban areas. Mapping morphological elements of less visible urban areas propose shifting from top-down urban planning policies to a participatory model of developing urban areas.
Originality/value
The assemblage of informally built urban areas legitimise place in the city that goes against the housing market's dominant logic and exceeds alternative logics of building production. This article outlined the urban morphologies of four urban areas for turning the image of informality away from decline and despair to lessons of urban interconnection. By creating different maps, the author presented a diverse orientation of four case studies based on density, accessibility, and operating assortment.
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Suranga Hettiarachchi and William M. Spears
The purpose of this paper is to demonstrate a novel use of a generalized Lennard‐Jones (LJ) force law in Physicomimetics, combined with offline evolutionary learning, for the…
Abstract
Purpose
The purpose of this paper is to demonstrate a novel use of a generalized Lennard‐Jones (LJ) force law in Physicomimetics, combined with offline evolutionary learning, for the control of swarms of robots moving through obstacle fields towards a goal. The paper then extends the paradigm to demonstrate the utility of a real‐time online adaptive approach named distributed agent evolution with dynamic adaptation to local unexpected scenarios (DAEDALUS).
Design/methodology/approach
To achieve the best performance, the parameters of the force law used in the Physicomimetics approach are optimized, using an evolutionary algorithm (EA) (offline learning). A weighted fitness function is utilized consisting of three components: a penalty for collisions, lack of swarm cohesion, and robots not reaching the goal. Each robot of the swarm is then given a slightly mutated copy of the optimized force law rule set found with offline learning and the robots are introduced to a more difficult environment. The online learning framework (DAEDALUS) is used for swarm adaptation in this more difficult environment.
Findings
The novel use of the generalized LJ force law combined with an EA surpasses the prior state‐of‐the‐art in the control of swarms of robots moving through obstacle fields. In addition, the DAEDALUS framework allows the swarms of robots to not only learn and share behavioral rules in changing environments (in real time), but also to learn the proper amount of behavioral exploration that is appropriate.
Research limitations/implications
There are significant issues that arise with respect to “wall following methods” and “local minimum trap” problems. “Local minimum trap” problems have been observed in this paper, but this issue is not addressed in detail. The intention is to explore other approaches to develop more robust adaptive algorithms for online learning. It is believed that the learning of the proper amount of behavioral exploration can be accelerated.
Practical implications
In order to provide meaningful comparisons, this paper provides a more complete set of metrics than prior papers in this area. The paper examines the number of collisions between robots and obstacles, the distribution in time of the number of robots that reach the goal, and the connectivity of the formation as it moves.
Originality/value
This paper addresses the difficult task of moving a large number of robots in formation through a large number of obstacles. The important real‐world constraint of “obstructed perception” is modeled. The obstacle density is approximately three times the norm in the literature. The paper shows how concepts from population genetics can be used with swarms of agents to provide fast online adaptive learning in these challenging environments. In addition, this paper also presents a more complete set of metrics of performance.
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Nyakundi Momanyi Michieka, Donald John Lacombe and Yiannis Ampatzidis
The purpose of this study is to examine the net effect of golf courses’ proximity on home sale prices in Kern County, California.
Abstract
Purpose
The purpose of this study is to examine the net effect of golf courses’ proximity on home sale prices in Kern County, California.
Design/methodology/approach
A spatial Durbin error model is used with sales price data for 1,693 homes sold in Kern County in the third quarter of 2018. This paper compares 90 different spatial econometric models using Bayesian techniques to produce posterior model probabilities which guided model selection and the number of neighbors to use.
Findings
The results show that significant spatial dependence exists in home values in Kern County. Point estimates indicate that homes abutting golf courses are valued at less than those which are not. This study also finds that the farther away from golf courses the average home is, the higher its value.
Originality/value
This study contributes to the existing literature in three dimensions. First, this paper analyzes whether proximity to golf courses impacts home values in Kern County where a study of this nature has not been conducted. Second, the analysis uses transaction data for 2018 which was a period when the sport’s popularity was fading and golf courses closing. Third, Bayesian model comparison techniques are used to select the appropriate model.
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Toyota's internationally coordinated production system in Asia and its selection of supply bases in South America and South Africa highlights the significance of recognizing…
Abstract
Toyota's internationally coordinated production system in Asia and its selection of supply bases in South America and South Africa highlights the significance of recognizing global network firms and the global hub-and-spoke logistics system that has been developed to meet their needs. This system underpins the expansion of container shipping, air freight and telecommunications. Recognition of Main Street, linking Europe, Asia and North America with cui-desacs in Africa, Australasia and Central and South America, provides a framework for examining the relative importance of the system's hubs and terminals across different modes and regions. This analysis provides the basis for identifying and ranking key regional logistics platforms in Northeast Asia and their attraction as headquarter sites for global network firms. Examining the logistical situation pertaining after the end of the Cold War in the early 1990s and a decade later is used to gauge progress towards regional economic integration in Northeast Asia.
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