Elisabete Silva

University of Cambridge | Cam · Department of Land Economy

Large-scale geotagged social media data have been increasingly used for exploring human movement patterns in cities. Challenges of this new data type, such as non-representative users and the lack of activity purposes, remain unsolved and limit its applications in exploring activity-based human patterns in cities. To deal with the above challenges,...

COVID-19 raises attention to epidemic transmission in various places. This study analyzes the transmission risks associated with human activity places at multiple scales, including different types of settlements and eleven types of specific establishments (restaurants, bars, etc.), using COVID-19 data in 906 urban areas across four continents. Thro...

The COVID-19 pandemic has resulted in cities implementing lockdown measures, causing unprecedented disruption (e.g. school/shop/office closures) to urban life often extending over months. With the spread of COVID-19 now being relatively contained, many cities have started to ease their lockdown restrictions by phases. Following the phased recovery...

The global urban population is expected to grow by 2.5 billion over the next three decades, and 90% of this growth will occur in African and Asian countries. Urban expansion in these regions is often characterised by ‘informal urbanization’ whereby households self-build without planning permission in contexts of ambiguous, insecure or disputed prop...

Delineating urban functional use plays a key role in understanding urban dynamics, evaluating planning strategies and supporting policymaking. In recent years, Points of Interest (POI) data, with precise geolocation and detailed attributes, have become the primary data source for exploring urban functional use from a bottom-up perspective, using lo...

The development of smart transport technologies, methods, strategies and infrastructures has drawn much attention in recent years, owing to the rise of smart cities paradigms and the rapid technological advancements in the transport sector. New transport technologies create opportunities and challenges for English cities to move towards a more sust...

The relationship between the built environment and travel behavior has long been a hot research topic. However, most existing research focus on aggregate measures of the patterns of daily travel (e.g. vehicle miles travelled, total distance travelled), while the mechanisms and processes that lead to these outcomes are much less researched. We there...

In a time of data science, online crowdsourced data and advanced data analytics would be a waste of resources and knowledge if these tools wouldn’t assist urban planning. This paper uses sentiment analysis to understand policy debates’ present in online media in a re-urbanized city and discusses how these tools and new datasets can help planners an...

The penetration of devices integrated with location-based services and internet services has generated massive data about the everyday life of citizens and tracked their activities happening in cities. Crowdsourced data, such as social media data, POIs data and collaborative websites, generated by the crowd, has become fine-grained proxy data of ur...

Although topics regarding “996 work system” and overtime working have aroused hot arguments, there is scant literature that analyses the spatial distribution and movement patterns of people who work overtime. This article fills this gap by adopting big data analysis and examining the mobile phone signal data which allow the calculation of the appro...

The term “behavioral” has become a hot topic in recent years in various disciplines; however, there is yet limited understanding of what theories can be considered behavioral theories and what fields of research they can be applied to. Through a cross-disciplinary literature review, this article identifies sixty-two behavioral theories from 963 sea...

Cities in Sub-Saharan Africa are undergoing massive spatial transformation owing to rapid urbanization. For many cities in the Global North, Latin America and Asia, spatial transformation has been traditionally characterised by a shift from monocentric to polycentric urban patterns. In the case of Sub-Saharan Africa, however, it is unclear whether...

This paper explores two main objectives: first, simulates the urban growth of a Ghanaian city-region with a CA model, drawing implications for urban planning and policy; and, second, explores the sensitivity of CA models to predominantly informal and un-regulated urban growth trajectories. CA model, SLEUTH, is calibrated for Accra city-region, and...

Cities in Sub-Saharan Africa are undergoing massive spatial transformation owing to rapid urbanization. For many cities in the Global North, Latin America and Asia, spatial transformation has been traditionally characterised by a shift from monocentric to polycentric urban patterns. In the case of Sub-Saharan Africa, however, it is unclear whether...

Data from long-term systematic pavement condition surveys provide opportunities to understand better the pavement degradation process. To provide more accurate predictions on future pavement conditions, spatial conditions are incorporated into degradation models of pavements in this paper. Long-term, city-scale pavement condition data from the San...

Over the years, many city managers, policy makers and academics alike have turned to high-rise buildings as pathway to sustainable urban development. However, the sustainability of such types of development in various geographical contexts, especially in sub-Saharan Africa, is a subject less explored. Amidst the promotion of high-rise development i...

In this paper, we developed a new integrated analysis environment in order to thoroughly analyses urban-building energy patterns, named IUBEA (integrated urban building energy analysis), which focuses on energy modeling and analysis of a city’s building stock to support district or city-scale efficiency programs. It is argued that cities and towns...

PM2.5 pollution has been a major environmental concern in Chinese cities for the past decade. In order to understand how pollution has proceeded, we produced a calendar view of the daily concentration of PM2.5 in Beijing from 2008 to 2017. The graphic shows that the pollution in Beijing intensified from 2008 to 2011 and then began to alleviate in 2...

Socio-spatial differentiation has been identified not only in capitalist market economies but also in transitional countries, including post-reform China. However, most prior studies on this topic in Chinese cities are limited to a spatial resolution of the sub-district level, and finer scale analyses remain scarce. Drawing on this gap, this articl...

Knowledge-intensive businesses (KIBs) are one of the fastest developing subsectors that play an integral role in the world's economy; they have been outperforming the total economy in terms of economic and regional growth and job creation recently. The KIBs are usually driven by qualified and skilled workers capable of contributing to the creativit...

International agreements such as those developed under the UN Framework Convention on Climate Change (UNFCCC) clearly aim at reducing greenhouse gas (GHG) emissions and emphasize the need for a strong international collaboration to build a global framework to be agreed on and implemented in the face of competing national interests has not emerged t...

Spatial metrics are quantitative measures for evaluating the physical characteristics of geographical features, such as urban settlements and structures (Reis, 2015 ; Reis et al., 2015). Just like other quantitative methods of spatial analysis, spatial metrics have garnered a growing interest of international research during the past two decades (C...

Over the years, many city managers, policy makers and academics alike have turned to high-rise buildings as pathway to sustainable urban development. However, the sustainability of such types of development in various geographical contexts, especially in sub-Saharan Africa, is a subject less explored. Amidst the promotion of high-rise development i...

Given the present size of modern cities, it is beyond the perceptual capacity of most people to develop a good knowledge about the qualities of the urban space at every street corner. Correspondingly, for planners, it is also difficult to accurately answer questions such as ‘where the quality of the physical environment is the most dilapidated in t...

Given the present size of modern cities, it is beyond the perceptual capacity of most people to develop a good knowledge about the qualities of the urban space at every street corner. Correspondingly, for planners, it is also difficult to accurately answer questions such as ‘where the quality of the physical environment is the most dilapidated in t...

Description Geographical Information Systems is a computer system used to capture, store, analyze and display information related to positions on the Earth’s surface. It has the ability to show multiple types of information on multiple geographical locations in a single map, enabling users to assess patterns and relationships between different info...

Over the years, urbanization has triggered complex spatial processes, such as the evolution of city-regions that defy traditional administrative regional boundaries. However, despite the growing body of research on city-regions, the evolution of this phenomenon and its implications for contemporary spatial governance remains a huge gap in urban pla...

Business model innovation has seen a recent surge in academic research and business practice. Changes to business models are recognised as a fundamental approach to realise innovations for sustainability. However little is known about the successful adoption of sustainable business models (SBMs). The purpose of this paper is to develop a unified th...

Much of the focus of research on creative industries’ influence upon urban land use has been around the investment in specific regeneration projects or flagship developments rather than addressing the nature and location of the infrastructure, networks and agents engaged. In other words, the complexity of the institutional/temporal and spatial inte...

This paper explores newspapers’ representation of different actors in infrastructure projects, and analyses the power relations between them through a case study in Hong Kong. The case in question is the highly controversial Express Rail Link, which connects Hong Kong to the extensive high-speed railway network in mainland China. It finds that unde...

This paper explores newspapers’ representation of different actors in infrastructure projects, and analyses the power relations between them through a case study in Hong Kong. The case in question is the highly controversial Express Rail Link, which connects Hong Kong to the extensive high-speed railway network in mainland China. It finds that unde...

Urban land change phenomena include spatial and a-spatial dynamics. As Holland (1995) suggests "a city's coherence is somehow imposed on a perpetual flux of people and structure." However, it seems that most of the traditional economic and geographic studies have tried to separate the two entities associated with land use change (human decision-mak...

Given the size of modern cities in the urbanising age, it is beyond the perceptual capacity of most people to develop a good knowledge about the beauty and ugliness of the city at every street corner. Correspondingly, for planners, it is also difficult to accurately answer questions like 'where are the worst-looking places in the city that regenera...

This paper presents an extension to the agent-based model "CID-USST (Creative Industries Development-Urban Spatial Structure Transformation)" by incorporating GIS data. Three agent classes, creative firms, creative workers and urban government, are considered in the model, and the spatial environment represents a set of GIS data layers (i.e. road n...

https://www.jtlu.org/index.php/jtlu/article/view/806/603 Updated information on article history can be found on the journal's website as follows: Article History: Received: May 9, 2014 Revised submission: September 30, 2014 Accepted: January 7, 2015 Available online: July 6, 2015

There has been an increasing interest in applying machine learning methods in urban energy assessment. This research implemented six statistical learning methods in estimating do-mestic gas and electricity using both physical and socio-economic explanatory variables in London. The input variables include dwelling types, household tenure, household...

This article reviews existing literature on spatial metrics, presenting a portfolio of metrics addressing the spatial patterns of growing and shrinking cities and discussing their potential and limitations. A wide and diverse set of spatial metrics was found. While these metrics address most of the identified spatial patterns of urban growth, spati...

This is the author accepted manuscript. The final version is avaible from Institution of Civil Engineers at http://www.icevirtuallibrary.com/content/article/10.1680/udap.2015.168.3.113.

http://www.routledge.com/books/details/9780415727952/

This is the author's accepted manuscript version and will be under embargo indefinitely. It will be replaced by the final published pdf version of article which will be under embargo for 12 months from the date of publication. The article will be published I the Proceedings of the ICE - Urban Design and Planning (http://www.icevirtuallibrary.com/co...

Urban land change phenomena include spatial and a-spatial dynamics. As Holland (1995) suggests “a city's coherence is somehow imposed on a perpetual flux of people and structure.” However, it seems that most of the traditional economic and geographic studies have tried to separate the two entities associated with land use change (human decision-mak...

http://www.routledge.com/books/details/9780415727952/

Creative industries have been widely adopted to promote economy growth, urban regeneration and innovation. It is expected that this strategy can produce a sustainable development model. However, in reality it is not effective enough because the implemented policy based on linear analysis is misleading. This chapter aims to fill this gap by examinin...

Urban land use change is a complex and dynamic process. It is therefore important to understand the complexity involved with system dynamics and choose appropriate modelling approaches. For this purpose, this paper firstly reviews how artificial intelligence (AI) approaches provide solutions to aid urban land dynamics modelling. The three dimension...

Creative industries have been widely adopted to promote economy growth, urban regeneration and innovation. It is expected that this strategy can produce a sustainable development model. However, in reality it is not effective enough because the implemented policy based on linear analysis is misleading. This chapter aims to fill this gap by examinin...

This paper brings to light some of the problems deriving from not systematically using regional planning as a strategic governance tool in land reform policy. With concrete examples from land reform sites in Northeast Brazil, we argue that factors leading to suboptimal results include the lack of a suited space for planned conjunct actions as a mea...

Modern urban regions are highly complex entities. Despite the difficulty of modeling every relevant aspect of an urban region, researchers have produced a rich variety of models dealing with the manifold processes of urban change. This article reviews the models discussed in the literature in order to understand the most important aspects in modeli...

https://ipea.gov.br/ppp/index.php/PPP/article/view/282/270

This article makes a case for using regional planning to improve the social and economic regional impact of land reform policy in developing countries. We focus on rural settlements in the Brazilian north-east, where land reallocation has been approached in a variety of ways over many decades. The study identifies problems deriving from the lack of...

This work reviews recent research efforts in the area of land reform in the developing world and comparatively evaluates different planning approaches per country. The historical antecedents, socio-economic circumstances, legal framework and different degrees of governmental intervention influencing the access to land in the countryside are covered...

IntroductionComputation: the raster–pixel aproachCells: migrating from basic pixelsAgents: joining with cellsCells and agents in a computer's “artificial life”The hexa-dpi: closing the cycle in the digital ageConclusions References

When developing a new urban area, town and transport planners have to establish the type of transport infrastructure and service that best fits the particular site and its future inhabitants. However in the existing urban areas one does not have the advantage of a " blank sheet " start, several restrictions have to be faced if one is to manage mobi...

Artificial intelligence (AI) systems are widely accepted as a technology offering an alternative way to tackle complex and dynamic problems in urban studies. The goal of this article is a review of current literature in the field of planning and AI. The aim of this review is to increase the understanding of how AI approaches urban and land dynamics...

Spatial planning is about dealing with our 'everyday' environment. In A Planner's Encounter with Complexity we present various understandings of complexity and how the environment is considered accordingly. One of these considerations is the environment as subject to processes of continuous change, being either progressive or destructive, evolving...

This paper develops a comprehensive approach to the definition of transportation analysis zones (TAZ), and therein, presents a new methodology and algorithm for the definition of TAZ embedded in geographic information systems software, improves the base algorithm with several local algorithms, and comprehensively analyses the obtained results. The...

Transportation analysis is typically thought of as one kind of spatial analysis. A major point of departure in understanding problems in transportation analysis is the recognition that spatial analysis has some limitations associated with the discretization of space. Among them, modifiable areal units and boundary problems are directly or indirectl...

Urban land use change is a complex and dynamic process. It is important to understand the complexity and dynamics in the change process of urban land (and choose correct data models) by analyzing the driving forces and its associated dynamics, in order to predict changes in the speed, intensity or trajectory (the process known as bifurcations or ph...

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The countervailing cellular automata (CVCA) is a loose coupled program designed to work in conjunction with SLEUTH (an urban cellular automata simulation model). CVCA operationalises a set of landscape ecological strategies for urban planning. CVCA first assesses a landscape against a set of landscape metrics. It then evaluates the proposed urban c...

In most transport planning studies, one of the first steps is the definition of a zoning scheme into which the study area is divided and the corresponding space is discretized. There are no clear rules on how to carry out this operation in an optimal way, and the dominating practice is to proceed on the basis of experience, trying to mix a certain...

What role does expert information play in the planning process, and how can the role be enhanced by integrating information management and simulation modelling tools into a participatory decision-making exercise? We examine these questions through a survey of pertinent planning literature, and a case study. This paper reports a workshop with expert...

The neighborhood of Campo de Ourique in Lisbon, Portugal, was evaluated for land use and transportation needs, and a proposal was made for a mobility plan. GeoMedia Professional, a fundamental part of the evaluation, was used to identify problems and opportunities at the neighborhood level and determine action areas and good practices. Methodology...