Author: Allan B. Jacobs
Publisher:
ISBN: 9780674863866
Category :
Languages : en
Pages : 168
Book Description
Allan Jacobs has written a city planning book for everyone with a passion for urban environments. His message--conveyed in word and vivid image--is that the people who make changes in cities base their decisions upon what they see, and that their visions and actions, which affect the lives of millions, have too often been faulty. Jacobs shows us how to read cities by identifying and discussing the many visual clues and their various meanings in different environments.
Looking at Cities
Why Cities Look the Way They Do
Author: Richard J. Williams
Publisher: John Wiley & Sons
ISBN: 0745691846
Category : Social Science
Languages : en
Pages : 179
Book Description
We tend to think cities look the way they do because of the conscious work of architects, planners and builders. But what if the look of cities had less to do with design, and more to do with social, cultural, financial and political processes, and the way ordinary citizens interact with them? What if the city is a process as much as a design? Richard J. Williams takes the moment construction is finished as a beginning, tracing the myriad processes that produce the look of the contemporary global city. This book is the story of dramatic but unforeseen urban sights: how financial capital spawns empty towering skyscrapers and hollowed-out ghettoes; how the zoning of once-illicit sexual practices in marginal areas of the city results in the reinvention of culturally vibrant gay villages; how abandoned factories have been repurposed as creative hubs in a precarious postindustrial economy. It is also the story of how popular urban clichés and the fictional portrayal of cities powerfully shape the way we read and see the bricks, concrete and glass that surround us. Thought-provoking and original, Why Cities Look the Way They Do will appeal to anyone who wants to understand the contemporary city, shedding new light on humanity’s greatest collective invention.
Publisher: John Wiley & Sons
ISBN: 0745691846
Category : Social Science
Languages : en
Pages : 179
Book Description
We tend to think cities look the way they do because of the conscious work of architects, planners and builders. But what if the look of cities had less to do with design, and more to do with social, cultural, financial and political processes, and the way ordinary citizens interact with them? What if the city is a process as much as a design? Richard J. Williams takes the moment construction is finished as a beginning, tracing the myriad processes that produce the look of the contemporary global city. This book is the story of dramatic but unforeseen urban sights: how financial capital spawns empty towering skyscrapers and hollowed-out ghettoes; how the zoning of once-illicit sexual practices in marginal areas of the city results in the reinvention of culturally vibrant gay villages; how abandoned factories have been repurposed as creative hubs in a precarious postindustrial economy. It is also the story of how popular urban clichés and the fictional portrayal of cities powerfully shape the way we read and see the bricks, concrete and glass that surround us. Thought-provoking and original, Why Cities Look the Way They Do will appeal to anyone who wants to understand the contemporary city, shedding new light on humanity’s greatest collective invention.
Planet of Cities
Author: Shlomo Angel
Publisher: Lincoln Inst of Land Policy
ISBN: 9781558442450
Category : Political Science
Languages : en
Pages : 343
Book Description
Nearly 4,000 cities on our planet today have populations of 100,000 people or more. We know their names, locations, and approximate populations from maps and other data sources, but there is little comparable knowledge about all these cities, and none that can be described as rigorously scientific. The Planet of Cities together with its companion volume, the Atlas of Urban Expansion, contributes to developing a science of cities based on studying all these cities together—not in the abstract, but with a view to preparing them for their coming expansion. The book puts into question the main tenets of the familiar Containment Paradigm, also known as smart growth, urban growth management, or compact city, that is designed to contain boundless urban expansion, typically decried as sprawl. It examines this paradigm in a broader global perspective and shows it to be deficient and practically useless in addressing the central questions now facing expanding cities outside the United States and Europe. In its place Shlomo Angel proposes to revive an alternative Making Room Paradigm that seeks to come to terms with the expected expansion of cities, particularly in the rapidly urbanizing countries in Asia and Africa, and to make the minimally necessary preparations for such expansion instead of seeking to contain it. This paradigm is predicated on four propositions:1. The expansion of cities that urban population growth entails cannot be contained. Instead we must make adequate room to accommodate it.2. City densities must remain within a sustainable range. If density is too low, it must be allowed to increase, and if it is too high, it must be allowed to decline.3. Strict containment of urban expansion destroys the homes of the poor and puts new housing out of reach for most people. Decent housing for all can be ensured only if urban land is in ample supply.4. As cities expand, the necessary land for public streets, public infrastructure networks, and public open spaces must be secured in advance of development.The first part of the book explores planetary urbanization in a historical and geographical perspective, to establish a global perspective for the study of cities. It confirms that we are in the midst of an urbanization project that started in earnest at the beginning of the nineteenth century, has now reached its peak with half the world population residing in urban areas, and will come to a close, possibly by the end of this century, when most people who want to live in cities will have moved there. This realization lends urgency to the call for preparing for urban expansion now, when the urbanization project is still in full swing, rather than later, when it would be too late to make a difference.The second part of the book seeks to deepen our understanding and thus lessen our fear of urban expansion by providing detailed quantitative answers to seven sets of questions regarding the dimensions and attributes of urban expansion:1. What are the extents of urban areas everywhere and how fast are they expanding over time?2. How dense are these urban areas and how are urban densities changing over time?3. How centralized are the residences and workplaces in cities and do they tend to disperse to the periphery over time? 4. How fragmented are the built-up areas of cities and how are levels of fragmentation changing over time?5. How compact are the shapes of urban footprints and how are their levels of compactness changing over time?6. How much land would urban areas require in future decades?7. How much cultivated land will be consumed by expanding urban areas?By answering these questions and exploring their implications for action, this book provides the conceptual framework, basic empirical data, and practical agenda necessary for the minimal yet meaningful management of the urban expansion process.The companion volume, Atlas of Urban Expansion, was also authored by Lincoln Institute visiting fellow Shlomo “
Publisher: Lincoln Inst of Land Policy
ISBN: 9781558442450
Category : Political Science
Languages : en
Pages : 343
Book Description
Nearly 4,000 cities on our planet today have populations of 100,000 people or more. We know their names, locations, and approximate populations from maps and other data sources, but there is little comparable knowledge about all these cities, and none that can be described as rigorously scientific. The Planet of Cities together with its companion volume, the Atlas of Urban Expansion, contributes to developing a science of cities based on studying all these cities together—not in the abstract, but with a view to preparing them for their coming expansion. The book puts into question the main tenets of the familiar Containment Paradigm, also known as smart growth, urban growth management, or compact city, that is designed to contain boundless urban expansion, typically decried as sprawl. It examines this paradigm in a broader global perspective and shows it to be deficient and practically useless in addressing the central questions now facing expanding cities outside the United States and Europe. In its place Shlomo Angel proposes to revive an alternative Making Room Paradigm that seeks to come to terms with the expected expansion of cities, particularly in the rapidly urbanizing countries in Asia and Africa, and to make the minimally necessary preparations for such expansion instead of seeking to contain it. This paradigm is predicated on four propositions:1. The expansion of cities that urban population growth entails cannot be contained. Instead we must make adequate room to accommodate it.2. City densities must remain within a sustainable range. If density is too low, it must be allowed to increase, and if it is too high, it must be allowed to decline.3. Strict containment of urban expansion destroys the homes of the poor and puts new housing out of reach for most people. Decent housing for all can be ensured only if urban land is in ample supply.4. As cities expand, the necessary land for public streets, public infrastructure networks, and public open spaces must be secured in advance of development.The first part of the book explores planetary urbanization in a historical and geographical perspective, to establish a global perspective for the study of cities. It confirms that we are in the midst of an urbanization project that started in earnest at the beginning of the nineteenth century, has now reached its peak with half the world population residing in urban areas, and will come to a close, possibly by the end of this century, when most people who want to live in cities will have moved there. This realization lends urgency to the call for preparing for urban expansion now, when the urbanization project is still in full swing, rather than later, when it would be too late to make a difference.The second part of the book seeks to deepen our understanding and thus lessen our fear of urban expansion by providing detailed quantitative answers to seven sets of questions regarding the dimensions and attributes of urban expansion:1. What are the extents of urban areas everywhere and how fast are they expanding over time?2. How dense are these urban areas and how are urban densities changing over time?3. How centralized are the residences and workplaces in cities and do they tend to disperse to the periphery over time? 4. How fragmented are the built-up areas of cities and how are levels of fragmentation changing over time?5. How compact are the shapes of urban footprints and how are their levels of compactness changing over time?6. How much land would urban areas require in future decades?7. How much cultivated land will be consumed by expanding urban areas?By answering these questions and exploring their implications for action, this book provides the conceptual framework, basic empirical data, and practical agenda necessary for the minimal yet meaningful management of the urban expansion process.The companion volume, Atlas of Urban Expansion, was also authored by Lincoln Institute visiting fellow Shlomo “
Cities for Life
Author: Jason Corburn
Publisher: Island Press
ISBN: 1642831727
Category : Architecture
Languages : en
Pages : 290
Book Description
In cities around the world, planning and health experts are beginning to understand the role of social and environmental conditions that lead to trauma. By respecting the lived experience of those who were most impacted by harms, some cities have developed innovative solutions for urban trauma. In Cities for Life, public health expert Jason Corburn shares lessons from three of these cities: Richmond, California; Medellín, Colombia; and Nairobi, Kenya. Corburn draws from his work with citizens, activists, and decision-makers in these cities over a ten-year period, as individuals and communities worked to heal from trauma--including from gun violence, housing and food insecurity, poverty, and other harms. Cities for Life is about a new way forward with urban communities that rebuilds our social institutions, practices, and policies to be more focused on healing and health.
Publisher: Island Press
ISBN: 1642831727
Category : Architecture
Languages : en
Pages : 290
Book Description
In cities around the world, planning and health experts are beginning to understand the role of social and environmental conditions that lead to trauma. By respecting the lived experience of those who were most impacted by harms, some cities have developed innovative solutions for urban trauma. In Cities for Life, public health expert Jason Corburn shares lessons from three of these cities: Richmond, California; Medellín, Colombia; and Nairobi, Kenya. Corburn draws from his work with citizens, activists, and decision-makers in these cities over a ten-year period, as individuals and communities worked to heal from trauma--including from gun violence, housing and food insecurity, poverty, and other harms. Cities for Life is about a new way forward with urban communities that rebuilds our social institutions, practices, and policies to be more focused on healing and health.
The City-State of Boston
Author: Mark Peterson
Publisher: Princeton University Press
ISBN: 0691209170
Category : History
Languages : en
Pages : 764
Book Description
A groundbreaking history of early America that shows how Boston built and sustained an independent city-state in New England before being folded into the United States In the vaunted annals of America’s founding, Boston has long been held up as an exemplary “city upon a hill” and the “cradle of liberty” for an independent United States. Wresting this revered metropolis from these misleading, tired clichés, The City-State of Boston highlights Boston’s overlooked past as an autonomous city-state, and in doing so, offers a pathbreaking and brilliant new history of early America. Following Boston’s development over three centuries, Mark Peterson discusses how this self-governing Atlantic trading center began as a refuge from Britain’s Stuart monarchs and how—through its bargain with the slave trade and ratification of the Constitution—it would tragically lose integrity and autonomy as it became incorporated into the greater United States. The City-State of Boston peels away layers of myth to offer a startlingly fresh understanding of this iconic urban center.
Publisher: Princeton University Press
ISBN: 0691209170
Category : History
Languages : en
Pages : 764
Book Description
A groundbreaking history of early America that shows how Boston built and sustained an independent city-state in New England before being folded into the United States In the vaunted annals of America’s founding, Boston has long been held up as an exemplary “city upon a hill” and the “cradle of liberty” for an independent United States. Wresting this revered metropolis from these misleading, tired clichés, The City-State of Boston highlights Boston’s overlooked past as an autonomous city-state, and in doing so, offers a pathbreaking and brilliant new history of early America. Following Boston’s development over three centuries, Mark Peterson discusses how this self-governing Atlantic trading center began as a refuge from Britain’s Stuart monarchs and how—through its bargain with the slave trade and ratification of the Constitution—it would tragically lose integrity and autonomy as it became incorporated into the greater United States. The City-State of Boston peels away layers of myth to offer a startlingly fresh understanding of this iconic urban center.
Virtual Cities
Author: Konstantinos Dimopoulos
Publisher: Unbound Publishing
ISBN: 1783528508
Category : Games & Activities
Languages : en
Pages : 257
Book Description
Virtual cities are places of often-fractured geographies, impossible physics, outrageous assumptions and almost untamed imaginations given digital structure. This book, the first atlas of its kind, aims to explore, map, study and celebrate them. To imagine what they would be like in reality. To paint a lasting picture of their domes, arches and walls. From metropolitan sci-fi open worlds and medieval fantasy towns to contemporary cities and glimpses of gothic horror, author and urban planner Konstantinos Dimopoulos and visual artist Maria Kallikaki have brought to life over forty game cities. Together, they document the deep and exhilarating history of iconic gaming landscapes through richly illustrated commentary and analysis. Virtual Cities transports us into these imaginary worlds, through cities that span over four decades of digital history across literary and gaming genres. Travel to fantasy cities like World of Warcraft’s Orgrimmar and Grim Fandango’s Rubacava; envision what could be in the familiar cities of Assassin’s Creed’s London and Gabriel Knight’s New Orleans; and steal a glimpse of cities of the future, in Final Fantasy VII’s Midgar and Half-Life 2’s City 17. Within, there are many more worlds to discover – each formed in the deepest corners of the imagination, their immense beauty and complexity astounding for artists, game designers, world builders and, above all, anyone who plays and cares about video games.
Publisher: Unbound Publishing
ISBN: 1783528508
Category : Games & Activities
Languages : en
Pages : 257
Book Description
Virtual cities are places of often-fractured geographies, impossible physics, outrageous assumptions and almost untamed imaginations given digital structure. This book, the first atlas of its kind, aims to explore, map, study and celebrate them. To imagine what they would be like in reality. To paint a lasting picture of their domes, arches and walls. From metropolitan sci-fi open worlds and medieval fantasy towns to contemporary cities and glimpses of gothic horror, author and urban planner Konstantinos Dimopoulos and visual artist Maria Kallikaki have brought to life over forty game cities. Together, they document the deep and exhilarating history of iconic gaming landscapes through richly illustrated commentary and analysis. Virtual Cities transports us into these imaginary worlds, through cities that span over four decades of digital history across literary and gaming genres. Travel to fantasy cities like World of Warcraft’s Orgrimmar and Grim Fandango’s Rubacava; envision what could be in the familiar cities of Assassin’s Creed’s London and Gabriel Knight’s New Orleans; and steal a glimpse of cities of the future, in Final Fantasy VII’s Midgar and Half-Life 2’s City 17. Within, there are many more worlds to discover – each formed in the deepest corners of the imagination, their immense beauty and complexity astounding for artists, game designers, world builders and, above all, anyone who plays and cares about video games.
Cities in Layers
Author: Philip Steele
Publisher: Big Picture Press
ISBN: 1536203106
Category : Juvenile Nonfiction
Languages : en
Pages : 64
Book Description
The world's most famous cities through the ages! Walk around any famous city and layers of history start to emerge. In London, Roman walls are dwarfed by office blocks. In Rome, ancient treasures like the Colosseum stand shoulder to shoulder with buildings from the Renaissance. In New York, skyscrapers from the 1920s and 1930s predate enormous glass towers. In Cities in Layers: Six Famous Cities Through Time, six major world cities are shown at different stages throughout history. A clever die-cut element allows readers to really peel back layers of time.
Publisher: Big Picture Press
ISBN: 1536203106
Category : Juvenile Nonfiction
Languages : en
Pages : 64
Book Description
The world's most famous cities through the ages! Walk around any famous city and layers of history start to emerge. In London, Roman walls are dwarfed by office blocks. In Rome, ancient treasures like the Colosseum stand shoulder to shoulder with buildings from the Renaissance. In New York, skyscrapers from the 1920s and 1930s predate enormous glass towers. In Cities in Layers: Six Famous Cities Through Time, six major world cities are shown at different stages throughout history. A clever die-cut element allows readers to really peel back layers of time.
Order without Design
Author: Alain Bertaud
Publisher: MIT Press
ISBN: 0262550970
Category : Political Science
Languages : en
Pages : 429
Book Description
An argument that operational urban planning can be improved by the application of the tools of urban economics to the design of regulations and infrastructure. Urban planning is a craft learned through practice. Planners make rapid decisions that have an immediate impact on the ground—the width of streets, the minimum size of land parcels, the heights of buildings. The language they use to describe their objectives is qualitative—“sustainable,” “livable,” “resilient”—often with no link to measurable outcomes. Urban economics, on the other hand, is a quantitative science, based on theories, models, and empirical evidence largely developed in academic settings. In this book, the eminent urban planner Alain Bertaud argues that applying the theories of urban economics to the practice of urban planning would greatly improve both the productivity of cities and the welfare of urban citizens. Bertaud explains that markets provide the indispensable mechanism for cities’ development. He cites the experience of cities without markets for land or labor in pre-reform China and Russia; this “urban planners’ dream” created inefficiencies and waste. Drawing on five decades of urban planning experience in forty cities around the world, Bertaud links cities’ productivity to the size of their labor markets; argues that the design of infrastructure and markets can complement each other; examines the spatial distribution of land prices and densities; stresses the importance of mobility and affordability; and critiques the land use regulations in a number of cities that aim at redesigning existing cities instead of just trying to alleviate clear negative externalities. Bertaud concludes by describing the new role that joint teams of urban planners and economists could play to improve the way cities are managed.
Publisher: MIT Press
ISBN: 0262550970
Category : Political Science
Languages : en
Pages : 429
Book Description
An argument that operational urban planning can be improved by the application of the tools of urban economics to the design of regulations and infrastructure. Urban planning is a craft learned through practice. Planners make rapid decisions that have an immediate impact on the ground—the width of streets, the minimum size of land parcels, the heights of buildings. The language they use to describe their objectives is qualitative—“sustainable,” “livable,” “resilient”—often with no link to measurable outcomes. Urban economics, on the other hand, is a quantitative science, based on theories, models, and empirical evidence largely developed in academic settings. In this book, the eminent urban planner Alain Bertaud argues that applying the theories of urban economics to the practice of urban planning would greatly improve both the productivity of cities and the welfare of urban citizens. Bertaud explains that markets provide the indispensable mechanism for cities’ development. He cites the experience of cities without markets for land or labor in pre-reform China and Russia; this “urban planners’ dream” created inefficiencies and waste. Drawing on five decades of urban planning experience in forty cities around the world, Bertaud links cities’ productivity to the size of their labor markets; argues that the design of infrastructure and markets can complement each other; examines the spatial distribution of land prices and densities; stresses the importance of mobility and affordability; and critiques the land use regulations in a number of cities that aim at redesigning existing cities instead of just trying to alleviate clear negative externalities. Bertaud concludes by describing the new role that joint teams of urban planners and economists could play to improve the way cities are managed.
Cities
Author: Monica L. Smith
Publisher: Penguin
ISBN: 0735223696
Category : History
Languages : en
Pages : 306
Book Description
"A revelation of the drive and creative flux of the metropolis over time."--Nature "This is a must-read book for any city dweller with a voracious appetite for understanding the wonders of cities and why we're so attracted to them."--Zahi Hawass, author of Hidden Treasures of Ancient Egypt A sweeping history of cities through the millennia--from Mesopotamia to Manhattan--and how they have propelled Homo sapiens to dominance. Six thousand years ago, there were no cities on the planet. Today, more than half of the world's population lives in urban areas, and that number is growing. Weaving together archeology, history, and contemporary observations, Monica Smith explains the rise of the first urban developments and their connection to our own. She takes readers on a journey through the ancient world of Tell Brak in modern-day Syria; Teotihuacan and Tenochtitlan in Mexico; her own digs in India; as well as the more well-known Pompeii, Rome, and Athens. Along the way, she presents the unique properties that made cities singularly responsible for the flowering of humankind: the development of networked infrastructure, the rise of an entrepreneurial middle class, and the culture of consumption that results in everything from take-out food to the tell-tale secrets of trash. Cities is an impassioned and learned account full of fascinating details of daily life in ancient urban centers, using archaeological perspectives to show that the aspects of cities we find most irresistible (and the most annoying) have been with us since the very beginnings of urbanism itself. She also proves the rise of cities was hardly inevitable, yet it was crucial to the eventual global dominance of our species--and that cities are here to stay.
Publisher: Penguin
ISBN: 0735223696
Category : History
Languages : en
Pages : 306
Book Description
"A revelation of the drive and creative flux of the metropolis over time."--Nature "This is a must-read book for any city dweller with a voracious appetite for understanding the wonders of cities and why we're so attracted to them."--Zahi Hawass, author of Hidden Treasures of Ancient Egypt A sweeping history of cities through the millennia--from Mesopotamia to Manhattan--and how they have propelled Homo sapiens to dominance. Six thousand years ago, there were no cities on the planet. Today, more than half of the world's population lives in urban areas, and that number is growing. Weaving together archeology, history, and contemporary observations, Monica Smith explains the rise of the first urban developments and their connection to our own. She takes readers on a journey through the ancient world of Tell Brak in modern-day Syria; Teotihuacan and Tenochtitlan in Mexico; her own digs in India; as well as the more well-known Pompeii, Rome, and Athens. Along the way, she presents the unique properties that made cities singularly responsible for the flowering of humankind: the development of networked infrastructure, the rise of an entrepreneurial middle class, and the culture of consumption that results in everything from take-out food to the tell-tale secrets of trash. Cities is an impassioned and learned account full of fascinating details of daily life in ancient urban centers, using archaeological perspectives to show that the aspects of cities we find most irresistible (and the most annoying) have been with us since the very beginnings of urbanism itself. She also proves the rise of cities was hardly inevitable, yet it was crucial to the eventual global dominance of our species--and that cities are here to stay.
The Cities Book
Author: Lonely Planet
Publisher: Lonely Planet
ISBN: 1787011666
Category : Travel
Languages : en
Pages : 1305
Book Description
Lonely Planet's bestselling The Cities Book is back. Fully revised and updated, it's a celebration of 200 of the world's most exciting urban destinations, beautifully photographed and packed with trip advice and recommendations from our experts - making it the perfect companion for any traveller deciding where to visit next. - Highlights and itineraries help travellers plan their perfect trip - Urban tales reveal unexpected bites of history and local culture - Discover each city's strengths, best experiences and most famous exports - Includes the top ten cities for beaches, nightlife, food and more - Lonely Planet co-founder Tony Wheeler shares his all-time favourite cities - Fully revised and updated with the best cities to visit right now About Lonely Planet: Lonely Planet is a leading travel media company and the world's number one travel guidebook brand, providing both inspiring and trustworthy information for every kind of traveller since 1973. Over the past four decades, we've printed over 145 million guidebooks and grown a dedicated, passionate global community of travellers. You'll also find our content online, on mobile, video and in 14 languages, 12 international magazines, armchair and lifestyle books, ebooks, and more. TripAdvisor Travelers' Choice Awards 2012, 2013, 2014, 2015 and 2016 winner in Favorite Travel Guide category 'Lonely Planet guides are, quite simply, like no other.' - New York Times 'Lonely Planet. It's on everyone's bookshelves; it's in every traveller's hands. It's on mobile phones. It's on the Internet. It's everywhere, and it's telling entire generations of people how to travel the world.' - Fairfax Media (Australia) Important Notice: The digital edition of this book may not contain all of the images found in the physical edition.
Publisher: Lonely Planet
ISBN: 1787011666
Category : Travel
Languages : en
Pages : 1305
Book Description
Lonely Planet's bestselling The Cities Book is back. Fully revised and updated, it's a celebration of 200 of the world's most exciting urban destinations, beautifully photographed and packed with trip advice and recommendations from our experts - making it the perfect companion for any traveller deciding where to visit next. - Highlights and itineraries help travellers plan their perfect trip - Urban tales reveal unexpected bites of history and local culture - Discover each city's strengths, best experiences and most famous exports - Includes the top ten cities for beaches, nightlife, food and more - Lonely Planet co-founder Tony Wheeler shares his all-time favourite cities - Fully revised and updated with the best cities to visit right now About Lonely Planet: Lonely Planet is a leading travel media company and the world's number one travel guidebook brand, providing both inspiring and trustworthy information for every kind of traveller since 1973. Over the past four decades, we've printed over 145 million guidebooks and grown a dedicated, passionate global community of travellers. You'll also find our content online, on mobile, video and in 14 languages, 12 international magazines, armchair and lifestyle books, ebooks, and more. TripAdvisor Travelers' Choice Awards 2012, 2013, 2014, 2015 and 2016 winner in Favorite Travel Guide category 'Lonely Planet guides are, quite simply, like no other.' - New York Times 'Lonely Planet. It's on everyone's bookshelves; it's in every traveller's hands. It's on mobile phones. It's on the Internet. It's everywhere, and it's telling entire generations of people how to travel the world.' - Fairfax Media (Australia) Important Notice: The digital edition of this book may not contain all of the images found in the physical edition.