Author: Daniel Elazar
Publisher: Routledge
ISBN: 1351323342
Category : History
Languages : en
Pages : 658
Book Description
The Opening of the Cybernetic Frontier is the third in-J. stallment in the Cities of the Prairie project. It completes an ongoing multi-generational, comparative study of ten medium-sized communities located in five Prairie and Plains states - Illinois, Iowa, Minnesota, Wisconsin, and Colorado. This long-term study was initiated by Daniel J. Elazar in 1959 to develop a comprehensive theory explaining and forecasting the development of the civil community based upon the changing relationship between internal developments and external factors.In this new volume, Elazar and his colleagues trace developments in these communities during the 1980s and 1990s. The study examines how local communities function politically, socially, and economically, and then analyzes the impact that regional, national, and international trends and patterns have on local political systems in general and the cities of the prairie in particular. It revisits these communities at the dawning of a new frontier, the city-cybernetic frontier, which is characterized by a knowledge-intensive economic base made possible by computer and communication technologies. Changing technology has accelerated the settlement patterns that emerged after World War II. Ongoing population sprawl means that individuals are leaving the suburbs to live in the exurbs and beyond, creating a citybelt phenomenon that relies upon new technologies.
The Opening of the Cybernetic Frontier
Author: Daniel Elazar
Publisher: Routledge
ISBN: 1351323342
Category : History
Languages : en
Pages : 658
Book Description
The Opening of the Cybernetic Frontier is the third in-J. stallment in the Cities of the Prairie project. It completes an ongoing multi-generational, comparative study of ten medium-sized communities located in five Prairie and Plains states - Illinois, Iowa, Minnesota, Wisconsin, and Colorado. This long-term study was initiated by Daniel J. Elazar in 1959 to develop a comprehensive theory explaining and forecasting the development of the civil community based upon the changing relationship between internal developments and external factors.In this new volume, Elazar and his colleagues trace developments in these communities during the 1980s and 1990s. The study examines how local communities function politically, socially, and economically, and then analyzes the impact that regional, national, and international trends and patterns have on local political systems in general and the cities of the prairie in particular. It revisits these communities at the dawning of a new frontier, the city-cybernetic frontier, which is characterized by a knowledge-intensive economic base made possible by computer and communication technologies. Changing technology has accelerated the settlement patterns that emerged after World War II. Ongoing population sprawl means that individuals are leaving the suburbs to live in the exurbs and beyond, creating a citybelt phenomenon that relies upon new technologies.
Publisher: Routledge
ISBN: 1351323342
Category : History
Languages : en
Pages : 658
Book Description
The Opening of the Cybernetic Frontier is the third in-J. stallment in the Cities of the Prairie project. It completes an ongoing multi-generational, comparative study of ten medium-sized communities located in five Prairie and Plains states - Illinois, Iowa, Minnesota, Wisconsin, and Colorado. This long-term study was initiated by Daniel J. Elazar in 1959 to develop a comprehensive theory explaining and forecasting the development of the civil community based upon the changing relationship between internal developments and external factors.In this new volume, Elazar and his colleagues trace developments in these communities during the 1980s and 1990s. The study examines how local communities function politically, socially, and economically, and then analyzes the impact that regional, national, and international trends and patterns have on local political systems in general and the cities of the prairie in particular. It revisits these communities at the dawning of a new frontier, the city-cybernetic frontier, which is characterized by a knowledge-intensive economic base made possible by computer and communication technologies. Changing technology has accelerated the settlement patterns that emerged after World War II. Ongoing population sprawl means that individuals are leaving the suburbs to live in the exurbs and beyond, creating a citybelt phenomenon that relies upon new technologies.
II Cybernetic Frontiers
Author: Stewart Brand
Publisher: Random House (NY)
ISBN:
Category : Computers
Languages : en
Pages : 104
Book Description
Publisher: Random House (NY)
ISBN:
Category : Computers
Languages : en
Pages : 104
Book Description
The Cybernetic Border
Author: Iván Chaar López
Publisher: Duke University Press
ISBN: 1478059036
Category : Social Science
Languages : en
Pages : 158
Book Description
In The Cybernetic Border, Iván Chaar López argues that the settler US nation requires the production and targeting of a racialized enemy that threatens the empire. The cybernetic border is organized through practices of data capture, storage, processing, circulation, and communication that police bodies and constitute the nation as a bounded, territorial space. Chaar López historicizes the US government’s use of border enforcement technologies on Mexicans, Arabs, and Muslims from the mid-twentieth century to the present, showing how data systems are presented as solutions to unauthorized border crossing. Contrary to enduring fantasies of the purported neutrality of drones, smart walls, artificial intelligence, and biometric technologies, the cybernetic border represents the consolidation of calculation and automation in the exercise of racialized violence. Chaar López draws on corporate, military, and government records, promotional documents and films, technical reports, news reporting, surveillance footage, and activist and artist practices. These materials reveal how logics of enmity are embedded into information infrastructures that shape border control and modern sovereignty.
Publisher: Duke University Press
ISBN: 1478059036
Category : Social Science
Languages : en
Pages : 158
Book Description
In The Cybernetic Border, Iván Chaar López argues that the settler US nation requires the production and targeting of a racialized enemy that threatens the empire. The cybernetic border is organized through practices of data capture, storage, processing, circulation, and communication that police bodies and constitute the nation as a bounded, territorial space. Chaar López historicizes the US government’s use of border enforcement technologies on Mexicans, Arabs, and Muslims from the mid-twentieth century to the present, showing how data systems are presented as solutions to unauthorized border crossing. Contrary to enduring fantasies of the purported neutrality of drones, smart walls, artificial intelligence, and biometric technologies, the cybernetic border represents the consolidation of calculation and automation in the exercise of racialized violence. Chaar López draws on corporate, military, and government records, promotional documents and films, technical reports, news reporting, surveillance footage, and activist and artist practices. These materials reveal how logics of enmity are embedded into information infrastructures that shape border control and modern sovereignty.
The Metropolitan Frontier and American Politics
Author: Daniel Elazar
Publisher: Routledge
ISBN: 1000679853
Category : Education
Languages : en
Pages : 353
Book Description
American civilization has been shaped by four decisive forces: the frontier, migration, sectionalism and federalism. The frontier has offered abundance to those who would/could take advantage of its opportunities, stimulated technological innovation, and been the source of continuous change in social structure and economic organization; migration has been responsible for relocating cultures from the Old world to the New: various sections of geographic territories have adjusted to the overall American culture without losing their individual distinctiveness; and federalism has shaped the United States' political and social organization., The Metropolitan Frontier and American Politics was begun in the late 1950s under the auspices of the University of Illinois Institute of Government and Public Affairs as a study of the eight "lesser" metropolitan areas in Illinois. What started out as a design for "community maps" of each area, with the intent to outline their particular political systems, led to a major study of metropolitan cities of the prairie-the "heartland" area between the Great Lakes and the Continental Divide-with an examination of the processes that have shaped American politics. The distinctive features of the geographic areas that Elazar discovered can best be understood as reflections of the differences in cultural backgrounds of their respective settlers. Proper understanding of these communities therefore requires an examination of their place in the federal system, the impact of frontier and section upon them, and a study of the cultures that inform them as civil communities. The volume is consequently divided into three parts: "Cities, Frontiers, and Sections," "Streams of Migration and Political Culture," and "Cities, States, and Nation," each of which explores Elazar's concerns in discovering the interrelationship between the cities of the frontier and American politics., A prequel to The Closing of the Metropolitan Frontier, The Metropolitan Frontier and American Politics will be of great interest to students of politics, American history and ethnography.
Publisher: Routledge
ISBN: 1000679853
Category : Education
Languages : en
Pages : 353
Book Description
American civilization has been shaped by four decisive forces: the frontier, migration, sectionalism and federalism. The frontier has offered abundance to those who would/could take advantage of its opportunities, stimulated technological innovation, and been the source of continuous change in social structure and economic organization; migration has been responsible for relocating cultures from the Old world to the New: various sections of geographic territories have adjusted to the overall American culture without losing their individual distinctiveness; and federalism has shaped the United States' political and social organization., The Metropolitan Frontier and American Politics was begun in the late 1950s under the auspices of the University of Illinois Institute of Government and Public Affairs as a study of the eight "lesser" metropolitan areas in Illinois. What started out as a design for "community maps" of each area, with the intent to outline their particular political systems, led to a major study of metropolitan cities of the prairie-the "heartland" area between the Great Lakes and the Continental Divide-with an examination of the processes that have shaped American politics. The distinctive features of the geographic areas that Elazar discovered can best be understood as reflections of the differences in cultural backgrounds of their respective settlers. Proper understanding of these communities therefore requires an examination of their place in the federal system, the impact of frontier and section upon them, and a study of the cultures that inform them as civil communities. The volume is consequently divided into three parts: "Cities, Frontiers, and Sections," "Streams of Migration and Political Culture," and "Cities, States, and Nation," each of which explores Elazar's concerns in discovering the interrelationship between the cities of the frontier and American politics., A prequel to The Closing of the Metropolitan Frontier, The Metropolitan Frontier and American Politics will be of great interest to students of politics, American history and ethnography.
The Cybernetics Moment
Author: Ronald R. Kline
Publisher: JHU Press
ISBN: 1421416727
Category : Technology & Engineering
Languages : en
Pages : 351
Book Description
How did cybernetics and information theory arise, and how did they come to dominate fields as diverse as engineering, biology, and the social sciences? Winner of the CHOICE Outstanding Academic Title of the Choice ACRL Outstanding Academic Title, Choice Cybernetics—the science of communication and control as it applies to machines and to humans—originates from efforts during World War II to build automatic antiaircraft systems. Following the war, this science extended beyond military needs to examine all systems that rely on information and feedback, from the level of the cell to that of society. In The Cybernetics Moment, Ronald R. Kline, a senior historian of technology, examines the intellectual and cultural history of cybernetics and information theory, whose language of “information,” “feedback,” and “control” transformed the idiom of the sciences, hastened the development of information technologies, and laid the conceptual foundation for what we now call the Information Age. Kline argues that, for about twenty years after 1950, the growth of cybernetics and information theory and ever-more-powerful computers produced a utopian information narrative—an enthusiasm for information science that influenced natural scientists, social scientists, engineers, humanists, policymakers, public intellectuals, and journalists, all of whom struggled to come to grips with new relationships between humans and intelligent machines. Kline traces the relationship between the invention of computers and communication systems and the rise, decline, and transformation of cybernetics by analyzing the lives and work of such notables as Norbert Wiener, Claude Shannon, Warren McCulloch, Margaret Mead, Gregory Bateson, and Herbert Simon. Ultimately, he reveals the crucial role played by the cybernetics moment—when cybernetics and information theory were seen as universal sciences—in setting the stage for our current preoccupation with information technologies.
Publisher: JHU Press
ISBN: 1421416727
Category : Technology & Engineering
Languages : en
Pages : 351
Book Description
How did cybernetics and information theory arise, and how did they come to dominate fields as diverse as engineering, biology, and the social sciences? Winner of the CHOICE Outstanding Academic Title of the Choice ACRL Outstanding Academic Title, Choice Cybernetics—the science of communication and control as it applies to machines and to humans—originates from efforts during World War II to build automatic antiaircraft systems. Following the war, this science extended beyond military needs to examine all systems that rely on information and feedback, from the level of the cell to that of society. In The Cybernetics Moment, Ronald R. Kline, a senior historian of technology, examines the intellectual and cultural history of cybernetics and information theory, whose language of “information,” “feedback,” and “control” transformed the idiom of the sciences, hastened the development of information technologies, and laid the conceptual foundation for what we now call the Information Age. Kline argues that, for about twenty years after 1950, the growth of cybernetics and information theory and ever-more-powerful computers produced a utopian information narrative—an enthusiasm for information science that influenced natural scientists, social scientists, engineers, humanists, policymakers, public intellectuals, and journalists, all of whom struggled to come to grips with new relationships between humans and intelligent machines. Kline traces the relationship between the invention of computers and communication systems and the rise, decline, and transformation of cybernetics by analyzing the lives and work of such notables as Norbert Wiener, Claude Shannon, Warren McCulloch, Margaret Mead, Gregory Bateson, and Herbert Simon. Ultimately, he reveals the crucial role played by the cybernetics moment—when cybernetics and information theory were seen as universal sciences—in setting the stage for our current preoccupation with information technologies.
New Jersey Politics and Government
Author: Barbara G. Salmore
Publisher: U of Nebraska Press
ISBN: 9780803292567
Category : Political Science
Languages : en
Pages : 474
Book Description
Discussing such issues as the development of a more activist posture within the state government and the response of the New Jersey polity to growing suburbanization, Barbara G. Salmore and Stephen A. Salmore present the only comprehensive overview of politics and government in New Jersey. This second edition includes a new chapter on the political changes in New Jersey since the book?s original publication in 1993.
Publisher: U of Nebraska Press
ISBN: 9780803292567
Category : Political Science
Languages : en
Pages : 474
Book Description
Discussing such issues as the development of a more activist posture within the state government and the response of the New Jersey polity to growing suburbanization, Barbara G. Salmore and Stephen A. Salmore present the only comprehensive overview of politics and government in New Jersey. This second edition includes a new chapter on the political changes in New Jersey since the book?s original publication in 1993.
Progress
Author: Robert David Sack
Publisher: JHU Press
ISBN: 9780801868726
Category : History
Languages : en
Pages : 166
Book Description
"The connection between geography and progress is fundamental," writes Robert Sack in the introduction to the present volume. Touching on both moral and material progress, six of the world's leading geographers and environmental historians explore differing aspects of this connection. Thomas Vale discusses whether progress is discernible in the natural realm; Kenneth Olwig examines fundamental changes that occurred to the notion of progress with the rise of modernity, while David Lowenthal and Yi-Fu Tuan discuss recent geographical changes that have resulted in an increasing societal disenchantment and anxiety. Nicholas Entrikin looks at progress as "moral perfectibility, and its connection to democratic places," a theme which Robert Sack further explores by prescribing ways in which geographers and citizens can evaluate and create places that increase our awareness of reality in its variety and complexity. Contributors: J. Nicholas Entrikin, University of California-Los Angeles; David Lowenthal, University College, London; Kenneth Olwig, University in Trondheim, Norway; Robert David Sack, University of Wisconsin-Madison; Yi-Fu Tuan, University of Wisconsin-Madison; Thomas R. Vale, University of Wisconsin-Madison.
Publisher: JHU Press
ISBN: 9780801868726
Category : History
Languages : en
Pages : 166
Book Description
"The connection between geography and progress is fundamental," writes Robert Sack in the introduction to the present volume. Touching on both moral and material progress, six of the world's leading geographers and environmental historians explore differing aspects of this connection. Thomas Vale discusses whether progress is discernible in the natural realm; Kenneth Olwig examines fundamental changes that occurred to the notion of progress with the rise of modernity, while David Lowenthal and Yi-Fu Tuan discuss recent geographical changes that have resulted in an increasing societal disenchantment and anxiety. Nicholas Entrikin looks at progress as "moral perfectibility, and its connection to democratic places," a theme which Robert Sack further explores by prescribing ways in which geographers and citizens can evaluate and create places that increase our awareness of reality in its variety and complexity. Contributors: J. Nicholas Entrikin, University of California-Los Angeles; David Lowenthal, University College, London; Kenneth Olwig, University in Trondheim, Norway; Robert David Sack, University of Wisconsin-Madison; Yi-Fu Tuan, University of Wisconsin-Madison; Thomas R. Vale, University of Wisconsin-Madison.
The Cybernetics Moment
Author: Ronald R. Kline
Publisher: JHU Press
ISBN: 1421416719
Category : Computers
Languages : en
Pages : 351
Book Description
Choice Outstanding Academic Title Cybernetics—the science of communication and control as it applies to machines and to humans—originates from efforts during World War II to build automatic antiaircraft systems. Following the war, this science extended beyond military needs to examine all systems that rely on information and feedback, from the level of the cell to that of society. In The Cybernetics Moment, Ronald R. Kline, a senior historian of technology, examines the intellectual and cultural history of cybernetics and information theory, whose language of “information,” “feedback,” and “control” transformed the idiom of the sciences, hastened the development of information technologies, and laid the conceptual foundation for what we now call the Information Age. Kline argues that, for about twenty years after 1950, the growth of cybernetics and information theory and ever-more-powerful computers produced a utopian information narrative—an enthusiasm for information science that influenced natural scientists, social scientists, engineers, humanists, policymakers, public intellectuals, and journalists, all of whom struggled to come to grips with new relationships between humans and intelligent machines. Kline traces the relationship between the invention of computers and communication systems and the rise, decline, and transformation of cybernetics by analyzing the lives and work of such notables as Norbert Wiener, Claude Shannon, Warren McCulloch, Margaret Mead, Gregory Bateson, and Herbert Simon. Ultimately, he reveals the crucial role played by the cybernetics moment—when cybernetics and information theory were seen as universal sciences—in setting the stage for our current preoccupation with information technologies. "Nowhere in the burgeoning secondary literature on cybernetics in the last two decades is there a concise history of cybernetics, the science of communication and control that helped usher in the current information age in America. Nowhere, that is, until now . . . Readers have in The Cybernetics Moment the first authoritative history of American cybernetics."—Information & Culture "[A]n extremely interesting and stimulating history of the concepts of cybernetics . . . This is a book for everyone to read, relish, and think about."—Choice "As a whole, the book presents a comprehensive in-depth retrospective analysis of the contribution of the American scientific school to the making, formation, and development of cybernetics and information theory. An unquestionable advantage of the book is the skillful use of numerous bibliographic sources by the author that reflect the scientific, engineering, and social significance of the questions being considered, competition of ideas and developments, and also interrelations between scientists."—Cybernetics and System Analysis "Dr. Kline is perhaps uniquely situated to take on so large and complicated [a] topic as cybernetics . . . Readers unfamiliar with Wiener and his work are well advised to start with this well-written and thorough book. Those who are already familiar will still find much that is new and informative in the thorough research and reasoned interpretations."—IEEE History Center "The most comprehensive intellectual history of cybernetics in Cold War America."—Journal of American History "The book will be most valuable as historical background for the large number of disciplines that were involved in the cybernetics moment: computer science, communications engineering, information theory, and the social sciences of sociology and anthropology."—IEEE Technology and Society Magazine "Ronald Kline’s chronicle of cybernetics certainly does what an excellent history of science should do. It takes you there—to the golden age of a new, exciting field. You will almost smell that cigar."—Second-Order Cybernetics "Kline’s The Cybernetics Moment tracks the rise and fall of the cybernetics movement in more detail than any historical account to date."—Los Angeles Review of Books
Publisher: JHU Press
ISBN: 1421416719
Category : Computers
Languages : en
Pages : 351
Book Description
Choice Outstanding Academic Title Cybernetics—the science of communication and control as it applies to machines and to humans—originates from efforts during World War II to build automatic antiaircraft systems. Following the war, this science extended beyond military needs to examine all systems that rely on information and feedback, from the level of the cell to that of society. In The Cybernetics Moment, Ronald R. Kline, a senior historian of technology, examines the intellectual and cultural history of cybernetics and information theory, whose language of “information,” “feedback,” and “control” transformed the idiom of the sciences, hastened the development of information technologies, and laid the conceptual foundation for what we now call the Information Age. Kline argues that, for about twenty years after 1950, the growth of cybernetics and information theory and ever-more-powerful computers produced a utopian information narrative—an enthusiasm for information science that influenced natural scientists, social scientists, engineers, humanists, policymakers, public intellectuals, and journalists, all of whom struggled to come to grips with new relationships between humans and intelligent machines. Kline traces the relationship between the invention of computers and communication systems and the rise, decline, and transformation of cybernetics by analyzing the lives and work of such notables as Norbert Wiener, Claude Shannon, Warren McCulloch, Margaret Mead, Gregory Bateson, and Herbert Simon. Ultimately, he reveals the crucial role played by the cybernetics moment—when cybernetics and information theory were seen as universal sciences—in setting the stage for our current preoccupation with information technologies. "Nowhere in the burgeoning secondary literature on cybernetics in the last two decades is there a concise history of cybernetics, the science of communication and control that helped usher in the current information age in America. Nowhere, that is, until now . . . Readers have in The Cybernetics Moment the first authoritative history of American cybernetics."—Information & Culture "[A]n extremely interesting and stimulating history of the concepts of cybernetics . . . This is a book for everyone to read, relish, and think about."—Choice "As a whole, the book presents a comprehensive in-depth retrospective analysis of the contribution of the American scientific school to the making, formation, and development of cybernetics and information theory. An unquestionable advantage of the book is the skillful use of numerous bibliographic sources by the author that reflect the scientific, engineering, and social significance of the questions being considered, competition of ideas and developments, and also interrelations between scientists."—Cybernetics and System Analysis "Dr. Kline is perhaps uniquely situated to take on so large and complicated [a] topic as cybernetics . . . Readers unfamiliar with Wiener and his work are well advised to start with this well-written and thorough book. Those who are already familiar will still find much that is new and informative in the thorough research and reasoned interpretations."—IEEE History Center "The most comprehensive intellectual history of cybernetics in Cold War America."—Journal of American History "The book will be most valuable as historical background for the large number of disciplines that were involved in the cybernetics moment: computer science, communications engineering, information theory, and the social sciences of sociology and anthropology."—IEEE Technology and Society Magazine "Ronald Kline’s chronicle of cybernetics certainly does what an excellent history of science should do. It takes you there—to the golden age of a new, exciting field. You will almost smell that cigar."—Second-Order Cybernetics "Kline’s The Cybernetics Moment tracks the rise and fall of the cybernetics movement in more detail than any historical account to date."—Los Angeles Review of Books
North Carolina Government & Politics
Author: Jack D. Fleer
Publisher: U of Nebraska Press
ISBN: 9780803268852
Category : Political Science
Languages : en
Pages : 380
Book Description
North Carolina has been a leader in the South and the nation since 1775, when it became "First in Freedom" by calling for its independence from British rule. Throughout its history, the state has had a reputation as a progressive force. This book offers both an assessment and an examination of the realities of the state's leadership. Analyzing a wide range of political actors and organizations, which includes the state legislature, the governor and executive branch, the judiciary, political parties, interest groups, and the media, Fleer illuminates North Carolina's rich political history, its evolving constitutional order, and its changing political culture. Although revealing a pattern of elitist paternalism in the state's political history, the book illustrates a parallel pattern of popular participation and control. Major forces of change are increasingly defining the state. These transitional factors include a significant biracial electorate, a stratified society, a diverse electorate, increasingly varied and mobilized political interest groups, a competitive political party system, and a more representative political leadership. New challenges to the state's future development are its aging population, the preparedness of its work force, the globalization of its economy, the protec-tion of its natural resources, and the education of its children for the next century. Each new political debate, policy choice, and election reminds North Carolinians of their fundamental challenge: establishing a government by enlightened and effective popular consent. Jack D. Fleer is a professor of political science at Wake Forest University and the author of North Carolina Politics: An Introduction.
Publisher: U of Nebraska Press
ISBN: 9780803268852
Category : Political Science
Languages : en
Pages : 380
Book Description
North Carolina has been a leader in the South and the nation since 1775, when it became "First in Freedom" by calling for its independence from British rule. Throughout its history, the state has had a reputation as a progressive force. This book offers both an assessment and an examination of the realities of the state's leadership. Analyzing a wide range of political actors and organizations, which includes the state legislature, the governor and executive branch, the judiciary, political parties, interest groups, and the media, Fleer illuminates North Carolina's rich political history, its evolving constitutional order, and its changing political culture. Although revealing a pattern of elitist paternalism in the state's political history, the book illustrates a parallel pattern of popular participation and control. Major forces of change are increasingly defining the state. These transitional factors include a significant biracial electorate, a stratified society, a diverse electorate, increasingly varied and mobilized political interest groups, a competitive political party system, and a more representative political leadership. New challenges to the state's future development are its aging population, the preparedness of its work force, the globalization of its economy, the protec-tion of its natural resources, and the education of its children for the next century. Each new political debate, policy choice, and election reminds North Carolinians of their fundamental challenge: establishing a government by enlightened and effective popular consent. Jack D. Fleer is a professor of political science at Wake Forest University and the author of North Carolina Politics: An Introduction.
Cyberpunk
Author: Katie Hafner
Publisher: Simon and Schuster
ISBN: 0684818620
Category : Science
Languages : en
Pages : 404
Book Description
Using the exploits of three international hackers, Cyberpunk explores the world of high-tech computer rebels and the subculture they've created. In a book as exciting as any Ludlum novel, the authors show how these young outlaws have learned to penetrate the most sensitive computer networks and how difficult it is to stop them.
Publisher: Simon and Schuster
ISBN: 0684818620
Category : Science
Languages : en
Pages : 404
Book Description
Using the exploits of three international hackers, Cyberpunk explores the world of high-tech computer rebels and the subculture they've created. In a book as exciting as any Ludlum novel, the authors show how these young outlaws have learned to penetrate the most sensitive computer networks and how difficult it is to stop them.