Characterisation of urban environment and activity across space and time using street images and deep learning in Accra

The urban environment influences human health, safety and wellbeing. Cities in Africa are growing faster than other regions but have limited data to guide urban planning and policies. Our aim was to use smart sensing and analytics to characterise the spatial patterns and temporal dynamics of features of the urban environment relevant for health, liveability, safety and sustainability. We collected a novel dataset of 2.1 million time-lapsed day and night images at 145 representative locations throughout the Metropolis of Accra, Ghana. We manually labelled a subset of 1,250 images for 20 contextually relevant objects and used transfer learning with data augmentation to retrain a convolutional neural network to detect them in the remaining images. We identified 23.5 million instances of these objects including 9.66 million instances of persons (41% of all objects), followed by cars (4.19 million, 18%), umbrellas (3.00 million, 13%), and informally operated minibuses known as tro tros (2.94 million, 13%). People, large vehicles and market-related objects were most common in the commercial core and densely populated informal neighbourhoods, while refuse and animals were most observed in the peripheries. The daily variability of objects was smallest in densely populated settlements and largest in the commercial centre. Our novel data and methodology shows that smart sensing and analytics can inform planning and policy decisions for making cities more liveable, equitable, sustainable and healthy

Characterisation of urban environment and activity across space and time using street images and deep learning in Accra

The urban environment influences human health, safety and wellbeing. Cities in Africa are growing faster than other regions but have limited data to guide urban planning and policies. Our aim was to use smart sensing and analytics to characterise the spatial patterns and temporal dynamics of features of the urban environment relevant for health, liveability, safety and sustainability. We collected a novel dataset of 2.1 million time-lapsed day and night images at 145 representative locations throughout the Metropolis of Accra, Ghana. We manually labelled a subset of 1,250 images for 20 contextually relevant objects and used transfer learning with data augmentation to retrain a convolutional neural network to detect them in the remaining images. We identified 23.5 million instances of these objects including 9.66 million instances of persons (41% of all objects), followed by cars (4.19 million, 18%), umbrellas (3.00 million, 13%), and informally operated minibuses known as tro tros (2.94 million, 13%). People, large vehicles and market-related objects were most common in the commercial core and densely populated informal neighbourhoods, while refuse and animals were most observed in the peripheries. The daily variability of objects was smallest in densely populated settlements and largest in the commercial centre. Our novel data and methodology shows that smart sensing and analytics can inform planning and policy decisions for making cities more liveable, equitable, sustainable and healthy

Comparative assessment of the vulnerability and resilience of 10 deltas : work document

Background information about: Nile delta (Egypt), Incomati delta (Mozambique), Ganges-Brahmaputra-Meghna (Bangladesh), Yangtze (China), Ciliwung (Indonesia), Mekong (Vietnam), Rhine-Meuse (The Netherlands), Danube (Romania), California Bay-Delta, Mississippi River Delta (USA

Drylands Facing Change

This edited volume examines the changes that arise from the entanglement of global interests and narratives with the local struggles that have always existed in the drylands of Africa, the Middle East, and Central Asia/Inner Asia. Changes in drylands are happening in an overwhelming manner. Climate change, growing political instability, and increasing enclosures of large expanses of often common land are some of the changes with far-reaching consequences for those who make their living in the drylands. At the same time, powerful narratives about the drylands as ‘wastelands’ and their ‘backward’ inhabitants continue to hold sway, legitimizing interventions for development, security, and conservation, informing re-emerging frontiers of investment (for agriculture, extraction, infrastructure), and shaping new dryland identities. The chapters in this volume discuss the politics of change triggered by forces as diverse as the global land and resource rush, the expansion of new Information and Communication Technologies, urbanization, the COVID-19 pandemic, and the spread of violent extremism. While recognizing that changes are co-produced by differently positioned actors from within and outside the drylands, this volume presents the dryland’s point of view. It therefore takes the views, experiences, and agencies of dryland dwellers as the point of departure to not only understand the changes that are transforming their lives, livelihoods, and future aspirations, but also to highlight the unexpected spaces of contestation and innovation that have hitherto remained understudied. This edited volume will be of much interest to students, researchers, and scholars of natural resource management, land and resource grabbing, political ecology, sustainable development, and drylands in general. The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license

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Why governance matters: a comparative study of the causes of deforestation in the miombo woodlands of Zambia and Mozambique, 1990 - 2010

Between 1990 and 2010 sub-Saharan Africa experienced some of the highest levels of deforestation anywhere in the world. The problem has been particularly acute in what are known as the miombo woodlands of southern Africa. These occupy a unique ecological niche and are crucial to the livelihoods of millions of people in the region, yet are disappearing rapidly. The aim of this thesis is to identify the structural causes of this phenomenon in two of the miombo countries, Zambia and Mozambique. Standard ‘resource based’ explanations for deforestation in both countries tend to focus primarily on demographic and economic factors, emphasising the impact of economic reforms, population growth, rural migration, poverty, minimal access to electricty and a lack of institutional resources. However I argue that these explanations do not account for Mozambique’s relatively better record on deforestation during the period in question, and that a more convincing account is offered by a ‘governance based’ explanation, which emphasises different forms of forest governance and institutional arrangements affecting the forest sector in each country. Specifically, Mozambique has fared better than Zambia thanks to its more secure system of traditional land tenure, the implementation of more progressive legislation and a sustained commitment to community based natural resource management. The implication is that future initiatives to curb deforestation in these countries should concentrate on addressing institutional and policy based shortcomings before implementing market based mechanisms designed to encourage conservation

Women’s Lived Landscapes of War and Liberation in Mozambique : Bodily Memory and the Gendered Aesthetics of Belonging

This book tells the history of the changing gendered landscapes of northern Mozambique from the perspective of women who fought in the armed struggle for national independence, diverting from the often-told narrative of women in nationalist wars that emphasizes a linear plot of liberation. Taking a novel approach in focusing on the body, senses, and landscape, Jonna Katto, through a study of the women ex-combatants’ lived landscapes, shows how their life trajectories unfold as nonlinear spatial histories. This brings into focus the women’s shifting and multilayered negotiations for personal space and belonging. This book explores the life memories of the now aging female ex-combatants in the province of Niassa in northern Mozambique, looking at how the female ex-combatants’ experiences of living in these northern landscapes have shaped their sense of socio-spatial belonging and attachment. It builds on the premise that individual embodied memory cannot be separated from social memory; personal lives are culturally shaped. Thus, the book does not only tell the history of a small and rather unique group of women but also speaks about wider cultural histories of body-landscape relations in northern Mozambique and especially changes in those relations. Enriching our understanding of the gendered history of the liberation struggle in Mozambique and informing broader discussions on gender and nationalism, this book will be of interest to students and scholars of African history, especially the colonial and postcolonial history of Lusophone Africa, as well as gender/women’s history and peace and conflict studies.Peer reviewe

Women’s Lived Landscapes of War and Liberation in Mozambique

This book tells the history of the changing gendered landscapes of northern Mozambique from the perspective of women who fought in the armed struggle for national independence, diverting from the often-told narrative of women in nationalist wars that emphasizes a linear plot of liberation. Taking a novel approach in focusing on the body, senses, and landscape, Jonna Katto, through a study of the women ex-combatants’ lived landscapes, shows how their life trajectories unfold as nonlinear spatial histories. This brings into focus the women’s shifting and multilayered negotiations for personal space and belonging. This book explores the life memories of the now aging female ex-combatants in the province of Niassa in northern Mozambique, looking at how the female ex-combatants’ experiences of living in these northern landscapes have shaped their sense of socio-spatial belonging and attachment. It builds on the premise that individual embodied memory cannot be separated from social memory; personal lives are culturally shaped. Thus, the book does not only tell the history of a small and rather unique group of women but also speaks about wider cultural histories of body-landscape relations in northern Mozambique and especially changes in those relations. Enriching our understanding of the gendered history of the liberation struggle in Mozambique and informing broader discussions on gender and nationalism, this book will be of interest to students and scholars of African history, especially the colonial and postcolonial history of Lusophone Africa, as well as gender/women’s history and peace and conflict studies

Towards Our Common Digital Future. Flagship Report.

In the report “Towards Our Common Digital Future”, the WBGU makes it clear that sustainability strategies and concepts need to be fundamentally further developed in the age of digitalization. Only if digital change and the Transformation towards Sustainability are synchronized can we succeed in advancing climate and Earth-system protection and in making social progress in human development. Without formative political action, digital change will further accelerate resource and energy consumption, and exacerbate damage to the environment and the climate. It is therefore an urgent political task to create the conditions needed to place digitalization at the service of sustainable development

Modelling spatial processes of infectious diseases

Human movement plays a key role in the spread of infectious diseases, leading to spatial heterogeneities in disease transmission. An understanding of the causes of these heterogeneities is important in the design, application, and evaluation of public health interventions. In this thesis, we developed a range of statistical models to elucidate spatial dependencies of infection patterns in different populations, and embed existing mobility models within a principled statistical framework. We applied a spatio-temporal generalized linear mixed model to include both climate and non-climate effects on malaria incidence in Malawi while implicitly accounting for spatial dependency and the role of human movement. We further developed methods for real-time assessment of an epidemic by adding spatial information in the calculation of reproductive numbers to account for spatial heterogeneities. A detailed review of mobility models and their use in infectious disease modelling was performed to identify current gaps and opportunities in the field. Finally, a model describing the rate at which human social contact is made in different locations was developed to identify individual-level differences in mobility. The implications for understanding epidemic process and informing control are discussed. With increasing availability of fine-scale mobility data, studying and understanding mobility patterns and their relationship with infectious disease spread will play a key role in developing efficient surveillance and control of emerging and re-emerging diseases