Image | |
EAN-13 | 9780393082876 |
Product Name | Smart Cities: Big Data, Civic Hackers, And The Quest For A New Utopia |
Language | English |
Category | Book / Magazine / Publication |
Short Description | Height:0 inches / Length:0 inches / Weight:0 pounds / Width:0 inches |
Amazon.com | Buy on Amazon ~ 0393082873 |
Price New | 15.99 US Dollars (curriencies) |
Price Used | 2.00 US Dollars (curriencies) |
Width | 1.4 inches (convert) |
Height | 9.6 inches (convert) |
Length | 6.6 inches (convert) |
Weight | 26.88 ounces (convert) |
Author | Anthony M. Townsend |
Page Count | 400 |
Binding | Hardcover |
Published | 10/07/2013 |
Features | Smart Cities |
Long Description | An unflinching look at the aspiring city-builders of our smart, mobile, connected future. We live in a world defined by urbanization and digital ubiquity, where mobile broadband connections outnumber fixed ones, machines dominate a new "internet of things," and more people live in cities than in the countryside. In Smart Cities , urbanist and technology expert Anthony Townsend takes a broad historical look at the forces that have shaped the planning and design of cities and information technologies from the rise of the great industrial cities of the nineteenth century to the present. A century ago, the telegraph and the mechanical tabulator were used to tame cities of millions. Today, cellular networks and cloud computing tie together the complex choreography of mega-regions of tens of millions of people. In response, cities worldwide are deploying technology to address both the timeless challenges of government and the mounting problems posed by human settlements of previously unimaginable size and complexity. In Chicago, GPS sensors on snow plows feed a real-time "plow tracker" map that everyone can access. In Zaragoza, Spain, a "citizen card" can get you on the free city-wide Wi-Fi network, unlock a bike share, check a book out of the library, and pay for your bus ride home. In New York, a guerrilla group of citizen-scientists installed sensors in local sewers to alert you when stormwater runoff overwhelms the system, dumping waste into local waterways. As technology barons, entrepreneurs, mayors, and an emerging vanguard of civic hackers are trying to shape this new frontier, Smart Cities considers the motivations, aspirations, and shortcomings of them all while offering a new civics to guide our efforts as we build the future together, one click at a time. |
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Created | 06-28-2013 1:43:17am |
Modified | 04-30-2020 7:25:10pm |
MD5 | a15ff83f17e8b5f8feddbd0935a6f16e |
SHA256 | 80921f8c3577d1707931c95afc85789ad5899c17c3e137c3ee33df73b3b50b49 |
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Code39 Barcodes
Code39 also known as Code 3 of 9 allows you to encode text using characters A-Z and 0-9 and some punctuation. Using an extended encoding system, it is possible to encode the entire ASCII character set.
Each character is made up of 10 elements where 5 are bars and 5 are spaces. You may have seen this described as 9 elements on other sites where 5 are bars and 4 are spaces but there is always a narrow space stripe between characters which means we might as well consider that trailing narrow space part of each character making the total number of elements 10. The final trailing narrow space simply appears to be absorbed into the quiet zone to the right of the final barcode. There is no check digit in this symbology unlike others. The variation between the width of the bars is what define the value of each character.
In the image below you will notice the start and stop block are the same. In most Code39 fonts,this is encoded as the asterisk (*) character although may or may not be displayed under the barcode. The text under the barcode is optional and is for human use only. The start and stop asterisks are not decoded when scanned and may or maynot bedisplayed. Also how the text is displayed depends on the process used to create the barcodes. Often, the text is simply under the barcode without the indent displayed in our sample.
Normally, there are only 43 characters that can be encoded using Code39. But if you want to encode the full ASCII characterset, you can prefix letters with special characters to get the characters you need including lower case and special characters. Although it is possible to encode the full ASCII set, if you actually need to do this it is better to use Code128 because it will produce a smaller barcode.
If you want to create your own Code39 barcode, you can visit our very own barcode generator page.