Android Cookbook
by Ian F. Darwin · 9 Apr 2012 · 960pp · 140,978 words
// been taken } @Override public void onPictureTaken(byte[] data, Camera camera) { // manipulate uncompressed image data } } See Also Recipe 6.6 6.8. Scanning a Barcode or QR Code with the Google ZXing Barcode Scanner Daniel Fowler Problem You want your app to be able to scan a barcode or QR (Quick Response) Code
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Google ZXing barcode scanner. Discussion One of the great features of Android is how easy it is to tap into existing functionality. Scanning barcodes and QR codes is a good example. Google has a free scanning app that you can access via an Intent; thus an app can easily add scanning functionality
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(https://market.android.com/details?id=com.google.zxing.client.android). In Example 6-16 there are three buttons to choose to scan either a QR code, a product barcode, or something else. There are two TextViews to display the type of barcode scanned and the data it contains. Example 6-16
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_width="fill_parent" android:layout_height="wrap_content"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/butQR" android:text="QR Code" android:textSize="18sp"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/butProd" android:text="Product" android:textSize="18sp"/> <Button
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void onClick(View arg0) { Intent intent = new Intent("com.google.zxing.client.android.SCAN"); switch(arg0.getId()){ case R.id.butQR: intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); break; case R.id.butProd: intent.putExtra("SCAN_MODE", "PRODUCT_MODE"); break; case R.id.butOther: intent.putExtra("SCAN_FORMATS", "CODE_39,CODE_93
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intent.putExtra("SCAN_FORMATS", "CODE_39"). For multiple SCAN_FORMATS pass a comma-separated list, refer back to Example 6-17. SCAN_MODESCAN_FORMATS QR_CODE_MODE QR_CODE PRODUCT_MODE EAN_13 EAN_8 RSS_14 UPC_A UPC_E ONE_D_MODE As for product mode plus... CODE_39 CODE_93 CODE
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the time of this writing in the Android Market, so you have to visit the website and download it (there is a Quick Response or QR code for downloading, so start in your laptop or desktop browser). And since it’s not in the Market, before you can download it you’ll
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take_picture.py test.py weather.py weather.pyc laptop$ See Also The official SL4A website is http://code.google.com/p/android-scripting/; a QR code is available there to download the latest binary. In addition, several textbooks are now available on SL4a, also listed there. 20.5. Creating Alerts in
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a list. Figure 20-9 shows how my own document list looks. Figure 20-9. List of Google documents 20.7. Sharing SL4A Scripts in QR Codes Rachee Singh Problem You have a neat/useful SL4A script and want to distribute it packed in a Quick Response
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(QR) code. Solution Use http://zxing.appspot.com/generator/ or one of several other QR code generators to generate a QR code that contains your entire script in the QR code graphic, and share this image. Discussion Most people think of QR codes as a convenient way to share URL-type links
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. Indeed, the printed edition of this book uses QR codes for individual downloads of sample applications. However, the QR code format is
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Android user can get the script onto his device without retyping it. QR codes are a great way to share your scripts if they are short (QR codes can only encode 4,296 characters of content). Follow these simple steps to generate a QR code for your script: Visit http://zxing.appspot.com/generator/ in your
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20-10 shows how this looks in action. Figure 20-10. Barcode generated from the SL4A script Many QR code readers are available for Android. Any such application can decipher the text that the QR code encrypts. For example, with the common ZXing barcode scanner, the script is copied to the clipboard (this is
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editor, pick a name for your script, ideally the same as the original if you know it—depending on how it was pasted into the QR code generator it may appear as the first line—then long-press in the body area and select Paste. You are now ready to save the
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and run it! It should look like Figure 20-11. Figure 20-11. The script, downloaded I was able to run the script from the QR code with no further work other than commenting out the script name in the body and typing it into the filename field, then clicking “Save and
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Download URL drawing smooth curves, Problem, Source Download URL drawing spinning cubes, Problem, Discussion Nine Patch files support, Problem, Discussion scanning barcodes, Problem, Discussion scanning QR codes, Problem, Discussion taking pictures using Camera class, Problem, Discussion taking pictures using intents, Problem, Source Download URL graphs, displaying with AndroidPlot, Problem, Source Download URL
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outgoing calls? getExtras() method, Solution, Discussion getIntent() method, Solution getString() method, Solution putExtra() method, Problem, Discussion, Discussion, Discussion putParcelableArrayListExtra() method, Discussion scanning barcodes, Solution scanning QR codes, Solution taking pictures and, Discussion intents, Device features, Discussion, Problem, Source Download URL, Problem, Source Download URL, Problem, Discussion, Problem, See Also, Discussion, Discussion, Problem
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Download URL opening items with, Problem, Source Download URL registering apps to receive, Discussion retrieving data from subactivities, Problem, See Also scanning barcodes, Solution scanning QR codes, Solution sending emails with attachments, Problem, Discussion taking pictures using, Problem, Source Download URL, Discussion inter-process communication, Solution (see IPC) Interface type (Java), Method
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, Problem, See Also native handset functionality from WebView, Problem, Discussion running apps natively, Problem, Source Download URL running Linux command, Problem sharing SL4A scripts in QR codes, Problem, Discussion ProgressBar class, Discussion ProgressDialog class, Use case 2: Processing in the foreground, Use case 2: Processing in the foreground, Problem about, Use case
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, Discussion, See Also S Saltsman, Adam, Solution Scalable Vector Graphics (SVG) format, Discussion, Discussion ScaleBarOverlay class, Solution scaling view backgrounds, Problem, Discussion scanning barcodes or QR codes, Problem, Discussion screen considerations, Screen size and density, Screen size and density, Problem, Source Download URL, Discussion, Discussion, Problem, See Also, Problem, Discussion creating loading
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, Problem, Discussion, Problem, Discussion creating alerts in, Problem, Discussion fetching and displaying Google Documents, Problem, Discussion getting started with, Problem, See Also sharing scripts in QR codes, Problem, Discussion scroll-wheel picker, Problem, Problem ScrollView class, Discussion SD (Secure Digital) card, Discussion, Problem, Problem app testing and, Discussion getting file information, Problem
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, Problem, Discussion, Problem, Discussion creating alerts in, Problem, Discussion fetching and displaying Google Documents, Problem, Discussion getting started with, Problem, See Also sharing scripts in QR codes, Problem, Discussion SlideME app store, Problem, See Also SlidingDrawer class, Problem, See Also, See Also, See Also, See Also, See Also, Problem, Problem animateOpen() method
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, Discussion date and time formats, Discussion displaying text fields, Problem gravity attribute, Discussion KeyListener examples, Discussion opening additional screens example, Discussion scanning barcodes, Discussion scanning QR codes, Discussion SlidingDrawer class and, Discussion textstyle attribute, Discussion Tipster program and, Examining Tipster.java typeface attribute, Discussion TextWatcher interface, Problem, Discussion, Discussion, Discussion, Discussion, Discussion
How to Turn Down a Billion Dollars: The Snapchat Story
by Billy Gallagher · 13 Feb 2018 · 359pp · 96,019 words
help users add friends—and potentially much more. In September 2014, Snapchat paid $50 million to acquire Scan, a Provo, Utah, startup that specialized in QR code (a type of barcode) scanning. Garrett Gee started Scan as a student project at Brigham Young University, where he captained the varsity soccer team. Gee
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, Kirk Ouimet, and Ben Turley became obsessed with QR code scanners and the idea of using your smartphone to interact with the physical world. But every QR code scanner they had downloaded and used was terrible. So they built Scan, a simple, intuitive way to
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physical world. Users could hover over an advertisement and pull up a one-pager on a product and purchase it. People could create their own QR code for their website or social media accounts. When the three founders were at a party at BYU, someone mentioned they had cracked twenty-seven downloads
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prohibited contestants from displaying URLs on camera but allowed Scan to use a big presentation board featuring a QR code for a demonstration. Before the show aired, Gee changed the end address that the QR code would lead to from a dummy URL that they’d used for filming to Scan’s Instagram page
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. While Scan ultimately did not receive funding from the Sharks, over three thousand people watching the show scanned the QR code, hundreds of whom followed their Instagram. A little over a year later, Gee was in Hawaii when Evan reached out to him about bringing Scan
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way to use Scan to realize its vision of bridging the digital and physical world. In its vision, you would tap on the barcode or QR code of an item in a store—say, a book like this one—and instantly receive a short page of information on it. You could learn
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reader to the publisher’s Discover page in Snapchat or to a page to download Snapchat. On a desktop, the links led users to a QR code that they could scan on their phone to open the content. Despite shutting down its Snap Channel, Snapchat still made original content opportunistically. Stephen Colbert
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grew ever more popular with media companies and celebrities, many took to making their profile pictures on Facebook and Twitter a Snapcode—a Snapchat-generated QR code that allows one user to add a second user on Snapchat if the first user takes a snap of the second’s
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QR code. Facebook and Twitter didn’t like these influencers using their sites to grow their Snapchat followings. Facebook suggested to one media company that if they
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so you will be able to buy from it.” Snapchat has also been experimenting with new types of advertising that take advantage of Snapchat’s QR code-scanning technology. Remember the earliest promotion on Snapchat? Frozen yogurt chain 16 Handles messaged its followers a coupon they had to use in the store
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before the ten-second photo disappeared. Snapchat’s new ads could do that at scale, letting users scan a QR code that unlocks a special time-sensitive deal on an advertiser’s product. Once again, Snapchat could look to Asian messaging giant Line, which they had
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from the last time you were there, provided you’d saved them to Snapchat Memories. The company has been fond of making old technologies like QR codes and top friend lists cool again, and could easily resurrect something like Foursquare’s mayor badges (whoever checked in the most at the local burger
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phone out, tap a button, and be whisked away to wherever you’d like to go. Snapchat could fulfill the original goal of Scan, the QR code-scanning app it acquired, and bridge the digital and physical world. Snapchat has been investing deeply in machine learning and image recognition, and it has
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users’ photographs and provide information about them, like a Google search or a visual Shazam. Or they could take a photograph—of a barcode or QR code to start, but of a product itself in the future—of something they want to buy in a store, and be offered options to purchase
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://sriramk.com/building-unmeasurable-things Panzarino, Matthew. “How a Startup Accidentally ‘Hacked’ Shark Tank with a QR Code.” TechCrunch, February 4, 2014. https://techcrunch.com/2014/02/04/how-a-startup-accidentally-hacked-shark-tank-with-a-qr-code/ Wadhwa, Vivek. “Wearable Tech and the Futurists’ Conundrum.” Washington Post, April 23, 2013. https://www
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-facing cameras Platco, Michael. See MPlatco (Michael Platco) Poke (Facebook app) Polaroid camera pornography Powell, Amy Primack, Dan Qualcomm Quinn, David Quinn Emanuel Urquhart & Sullivan QR codes Snapcode Randall, Mike Recode Red Bull Reid, L. A. Revel Systems Rhodes, Mike Rice, Condoleezza Riggs, Jason Robinhood Rodriguez, Jon Rosenblum, Mendel Ross, Blake Rothfels
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Ryan, Rob Sacca, Chris Sahami, Mehran Salesforce Salzhauer, Michael. See Dr. Miami (Michael Salzhauer) Samsung Sandberg, Sheryl Sanders, Bernie Saturday Night Live Sawyer, Diane Scan (QR code app) Schiffer, Eric Schmidt, Eric Sculley, John Secret (app) Sehn, Tim selfies Academy Awards (2014) selfie with Ellen DeGeneres first photographic self-portrait history of
Lonely Planet Pocket Hong Kong
by Lonely Planet
Kowloon to Central for the most inspiring vistas, or go aboard at around 8pm to catch the Symphony of Lights from the water. Scan this QR code to book Star Ferry Water Tours online. All Aboard Consider a trip on the Star Ferry as the ultimate Hong Kong orientation, a floating observation
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the Central–Mid-Levels escalator, which connects via a footbridge. Museum and art exhibitions open from 11am to 7pm (some are closed Mondays). Scan this QR code to sign-up for free daily guided tours in English. Big Station Meaning ‘Big Station’ in Cantonese, Tai Kwun is how locals have long referred
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makes all the difference. Get a nine-day local forecast at the Hong Kong Observatory website, and a pollution forecast at aqicn.org. Scan this QR code to book advance tickets for the Peak Tram and Sky Terrace 428. All Aboard the Peak Tram Departing every 15 minutes from its base station
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lives of residents. Book online. There are also monthly themed preservation, haunted and treasure-hunt tours. Open Monday to Sunday 10am to 6pm. Scan this QR code to learn more and book tours. More Than a House The Blue House isn’t just a pretty pit stop for photos. On the ground
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properly. The temple is near the Blue House Cluster and Wan Chai Market, so you can tick off multiple sights in one go. Scan this QR code for more information and opening times. Admire the Architecture Before stepping inside, take a moment to appreciate the temple’s exterior. Admire the ridge of
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of the harbour, take the sampan ferry across to Ap Lei Chau and back. Flash your Octopus card to board (HK$2.50). Scan this QR code to book tickets for the Aberdeen 1773 Fishing Heritage Tour. Mess Around in Sampans Harbour tours in squat Chinese boats called sampans are Aberdeen’s
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a donation. To avoid crowds, visit on weekdays instead of weekends. Pick a clear weather day to visit as some areas are outdoors. Scan this QR code for more information and opening hours. Go Big or Go Big Sik Sik Yuen Wong Tai Sin Temple is one of Hong Kong’s largest
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Nan Lian Garden in one visit. These two Tang dynasty–style attractions are connected by a footbridge and right next to each other. Scan this QR code for more information and an aerial map. History of a Convent Life Established in 1934, the nunnery provided a haven for women monastics during the
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and beautiful gifts. Browse from a wide range of items, including tea sets, bookmarks, journals, bags, fans, dried goods, veggie sauces and more. Scan the QR code for more information and an aerial map. Picture Perfect Noise barriers are put in place all over the garden to help shield it from the
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opening after sundown. There’s not much happening in the day, but come 8pm crowds start to flock to this open-air market. Scan this QR code for more information and opening times. Food Glorious Food Since 2023, a section of Temple Street Night Market, stretching from Jordan Rd to Nanking St
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spot tends to be crowded, with tour groups arriving by the busload. To avoid crowds, visit on a weekday rather than the weekend. Scan this QR code for practical information and opening hours. Altar to the City Once celebrated as the ‘Vatican of the Far East’, the Church of St Paul was
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than enough time at this temple. Group your visit together with the nearby Mandarin’s House and Chapel of Our Lady of Penha. Scan this QR code for more information and opening times. It’s All in the Design The first thing you’ll notice is the grandeur of the exterior. The
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PRIDE Fly the flag at the annual Hong Kong Pride parade, which usually takes place in November at Victoria Park. Find more information using the QR code. PINK DOT The largest annual gay event is in October at Tamar Park or West Kowloon. Everyone wears pink, with the crowd forming a giant
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are plenty of water fountains throughout Hong Kong. You can find them at MTR stations and around the city. Find your nearest fountain using the QR code. KIDSADA MANCHINDA/SHUTTERSTOCK © Tours Rather than zipping around by taxi or car, discover a different side of Hong Kong and explore its culture, food scene
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the world. There are many carbon calculators online that allow travellers to estimate the carbon emissions generated by their journey; try resurgence.org using the QR code, right. Accessible Travel Accommodation When booking hotels in Hong Kong, ask beforehand about accessibility. Trusted global brands like Hilton and Marriott offer reliable options. Consider
Lonely Planet Hong Kong
by Lonely Planet
deck has the best views and is air-conditioned in summer. Note that ferry fares are nominally higher on weekends and public holidays. Scan the QR code to contact the Transport Complaints Unit hotline. Ferries While Lantau can be reached by MTR and bus, for the other Outlying Islands boats remain the
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. It’s a waterborne commute dressed up as a dirt-cheap sightseeing cruise. Get set for those skyline views. Ruslan Kokarev/Shutterstock © PRACTICALITIES Scan this QR code to access the booking portal for Star Ferry’s ‘Water Tour’ cruises. STAR FERRY SIGHTSEEING TOURS For a more substantial voyage than the sub-ten
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spots for food and cocktails, and sobering law-and-order exhibits in the old prison blocks and courthouse. Lee Yiu Tung/Shutterstock © PRACTICALITIES Scan this QR code to sign-up for free daily guided tours in English. DON’T MISS Parade Ground Barrack Block heritage gallery JC Contemporary Central Magistracy B Hall
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Wu-Tang Clan. Another Clockenflap followed just nine months later in order to get the event back on its regular November/December timeline. Scan this QR code for tickets & line-ups Hong Kong’s OG Milk Tea A cuppa without compare Lan Fong Yuen, a rickety cha chaan tang (Hong Kong tea
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trips if you have time: many find the night view even more spectacular. Peak Tower, Victoria Peak | Ian Dagnall/Alamy Stock Photo © PRACTICALITIES Scan this QR code to book advance tickets for the Peak Tram and Sky Terrace 428. DON’T MISS Peak Tram Lions View Point Pavilion Peak Circle Walk Victoria
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buildings) with cast-iron balconies. The structure once housed diverse businesses like hospitals, temples and even a kung fu studio. leungchopan/Shutterstock © PRACTICALITIES Scan this QR code for opening hours, tours, events and workshops. DON’T MISS Free guided tours in English (11am Saturdays) Hong Kong House of Stories Orange, Yellow and
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temple offers a rare, peaceful and spiritual pocket of calm amidst the high-rises and dramatic Banyan trees. robertharding/Alamy Stock Photo © PRACTICALITIES Scan this QR code for more information and opening hours. DON’T MISS Dragon sculptures Lotus flower lanterns Antique bells Lighting an incense stick Copper statue of Pak Tai
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, you can discover traces of their community along Aberdeen’s harbour promenade and on the water via sampan boat tours. leungchopan/Shutterstock © PRACTICALITIES Scan this QR code to book tickets for the Aberdeen 1773 Fishing Heritage Tour. DON’T MISS Harbour tours Boat noodles Aberdeen Promenade Pier 6 Museum Ap Lei Chau
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major celebrations like Buddha’s birthday and Chinese New Year, worshippers come here to pray and seek fortune-telling. Hanna Yohanna/Shutterstock © PRACTICALITIES Scan this QR code for more information and opening hours. DON’T MISS Main Hall Three Saints Hall The Zodiac Statues Burning incense Good Wish Garden Taisui Yuanchen Hall
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these two Tang dynasty-style attractions are connected by a footbridge and right next to each other. Nan Lian Garden | TTstudio/Shutterstock © PRACTICALITIES Scan this QR code for more information and opening times. DON’T MISS Lotus pond garden Hall of Celestial Kings The rockery Bonsai courtyard Spring Hill waterfall Golden Pavilion
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the ‘Vatican of the East’, the magnificent facade stands as a testament to the city’s history and resilience. Daniel_Ferryanto/Shutterstock © PRACTICALITIES Scan this QR code for more information and opening hours. DON’T MISS The stairway Facade details Crypt & ossuary Museum of Sacred Art Na Tcha Temple Remains of St
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-Ma (also known as Mazu or Tin Hau), the temple is set on different levels and built into the hillside. Weerawayfarer/Shutterstock © PRACTICALITIES Scan this QR code for more information and opening hours. DON’T MISS Gate Pavilion Memorial Arch Prayer Hall Hall of Benevolence Hall of Guanyin Zhengjiao Chanlin Lighting an
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into the protection and conservation of wetland habitats in the face of climate change. Eastern Cattle Egret, Mai Po | Danita Delimont/Shutterstock © PRACTICALITIES Scan this QR code to book tours. Around 60,000 species of migratory waterbirds from the north spend their non-breeding season here. Alongside birds, it is also home
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has served as a witness to – and victim of – China and Hong Kong’s turbulent 20th century. Yung Chi Wai Derek/Shutterstock © PRACTICALITIES Scan this QR code to apply for your free permit to visit Sha Tau Kok. DON’T MISS Sha Tau Kok Railway Station Chung Ying Street Sha Tau Kok
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boat tour into the park is a rewarding and relaxing day out. Hexagonal volcanic rock columns, Hong Kong Geopark | Terry Sze/Shutterstock © PRACTICALITIES Scan this QR code to book tours in the Geopark. DON’T MISS Hexagonal Rock Columns High Island East Dam Biu Tsim Kok Lookout Concrete Dolosse Lai Chi Wo
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it an easy place to get lost - or as lost as you can on a 1.16 sq-km island. friendskevin/Shutterstock © PRACTICALITIES Scan this QR code to see the ferry timetable. DON’T MISS Ping Chau Country Trail Cham Keng Chau, ‘Chopped Neck Islet’ Lung Lok Shui, ‘Dragon Descend into Water
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scalable peaks, its oldest temple, and the peaceful and picturesque Po Toi O, the fishing village that time forgot. Gorma Kuma/Shutterstock © PRACTICALITIES Scan this QR code to celebrate Tin Hau’s Birthday at Joss House Bay. DON’T MISS High Junk Peak Country Trail Tin Ha Shan High Junk Peak Joss
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worship at the altar of Walt Disney. So don those Mickey Mouse ears, buy the ticket and get in line. chingyunsong/shutterstock © PRACTICALITIES Scan this QR code to book your tickets. DON’T MISS World Of Frozen Hong Kong Disneyland Railroad Hyperspace Mountain Iron Man Experience Jungle River Cruise & Tarzan’s Treehouse
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Territories and well worth the trip, particularly via the epic cable car ride through the mountains from Tung Chung. Adrian Baker/Shutterstock © PRACTICALITIES Scan this QR code to get your Ngong Ping tickets. DON’T MISS Ngong Ping Cable Car Tian Tan Buddha Po Lin Monastery Vegetarian Restaurant Hikes from Po Lin
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where you can fill up your own container. The Water For Free mobile app has over 1500 water-dispenser locations mapped in HK. Scan this QR code for water-dispenser locations. Think Twice about Seafood Almost all food in HK is imported, including most seafood. Some species are under threat, while others
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Nest (next to St John’s Cathedral) and Café 8 (above the Maritime Museum). Between them they employ 25 staff with learning difficulties. Scan this QR code to read more about these social enterprise cafes. Support the Work of WWF Hong Kong Support the World Wide Fund for Nature’s work on
Digital Bank: Strategies for Launching or Becoming a Digital Bank
by Chris Skinner · 27 Aug 2013 · 329pp · 95,309 words
I looked at a new LCD TV on Google last night for $499 and, as I walk past the electronics store, will offer me a QR-coded coupon to buy that TV now for $449 at a saving of 50 bucks. The Digital Bank is already here, in fact. Just look at
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the internet of things. Today, you buy things by taking them to the teller; tomorrow, if you want to buy something, you just read the QR code or hold your phone over its RFID tag. In addition, in the near future, the internet of things will be driven by the mobile internet
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deposited. This is one of the most talked about developments in mobile applications in the USA. Meanwhile, in Asia, images are being used along with QR codes[18] to support completely automated banking. For example, Jibun Bank and eBank in Japan both accept account opening on the basis of just a photograph
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checked with the government’s driving database. As long as all is aligned, the account is opened. More recently, Barclays Bank in the UK introduced QR codes to their P2P payments app, Pingit. The app allows billing companies to send paper payment requests to customers with a
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QR code and, if the customer uses their smartphone to read the code, all of the billing information and customer account information is embedded with the code
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a Point-of-Sale (PoS) system in 2011 that will allow Bitcoins to be traded on merchants terminals in stores. The system is based upon QR codes – digital barcodes for mobile – and these are printed by the Verifone terminal. The customer can then scan this into their phone. Equally, they can make
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a Bitcoin payment by presenting the QR code on their phone for the merchant to scan. This does not mean that Bitcoins emergence into the public domain has been without issue. For example
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, in May 2012, Barclays went one step further and launched Barclays’ Pingit for Corporates. Now they’re pushing for merchants to offer Pingit via simple QR codes and Corporate Identifiers. The idea of the Corporate ID is that firms can buy Pingit accounts such that customers just put in “Tesco” or “Waterstones
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’s pretty cool. Even better is that you can embed all the data you need in a QR code. So, as you walk past an ad for a charity campaign, hold your phone over the QR code and make an immediate donation or, even better for the utility firms, send out a bill to
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a customer with a QR code embedded that includes all the payment details and the payment amount. All the customer needs to do then is hold their phone over the code,
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then attracted corporate interest, and so we have since been launching several services for corporate to work with that consumer app, such as paying with QR codes via Pingit for utility bills. And what sort of results have you found since moving into the mobile payments space? The speed of growth of
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pay to a company just by typing in the company’s registered name and amount to pay. We then introduced this ability to pay by QR code. QR stands for Quick Response, and is a barcode of black dots that can be used on mobile telephones by reading them on a smartphone
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name, account details as well as the customer’s name and account details. Similarly, firms can send out a bill to a customer with a QR code embedded that includes all the payment details and the payment amount. All the customer needs to do then is hold their phone over the code
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Phones sold. See http://www.forbes.com/sites/tristanlouis/2013/08/10/how-much-do-average-apps-make/ for more info. [18] A Quick Response (QR) code) is a barcode that is readable by camera telephones. The code consists of black modules arranged in a square on a white background and can
Mastering Blockchain, Second Edition
by Imran Bashir · 28 Mar 2018
: bitcoin payment request (using Blockchain wallet) The sender either enters the receiver's address or scans the QR code that has the Bitcoin address, amount and optional description encoded in it. The wallet application recognizes this QR code and decodes it into something like Please send <Amount> BTC to the Bitcoin address <receiver's
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here with values: Please send 0.00033324 BTC to the Bitcoin address 1JzouJCVmMQBmTcd8K4Y5BP36gEFNn1ZJ3. This is also shown in the screenshot presented here: Bitcoin payment QR code The QR code shown in the preceding screenshot is decoded to bitcoin://1JzouJCVmMQBmTcd8K4Y5BP36gEFNn1ZJ3?amount=0.00033324 which can be opened as a URL in Bitcoin wallet. In the
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, digitally signed, broadcasted, validated and added to the block will become clear in the following sections. From a user's point of view, once the QR code is decoded the transaction will appear similar to what is shown in the following screenshot: Send BTC using Blockchain wallet Note that in the preceding
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to 30 characters in order to allow storage where physical space is limited, for example, etching on physical coins or encoding in damage-resistant QR codes. The QR code becomes more damage resistant because more dots can be used for error correction and less for encoding the private key. The private key encoded using
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readers can find more information here https://en.bitcoin.it/wiki/Casascius_physical_bitcoins. A Casascius physical bitcoin's security hologram paper with minikey and QR code The Bitcoin core client also allows the encryption of the wallet that contains the private keys. Public keys in Bitcoin Public keys exist on the
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. A typical bitcoin address looks like a string shown here: 1ANAguGG8bikEv2fYsTBnRUmx7QUcK58wt This is also commonly encoded in a QR code for easy distribution. The QR code of the preceding bitcoin address is shown in the following screenshot: QR code of a bitcoin address 1ANAguGG8bikEv2fYsTBnRUmx7QUcK58wt Currently, there are two types of addresses, the commonly used P2PKH and
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the following screenshot: Vanity address generated from https://bitcoinvanitygen.com/ In the preceding screenshot, on the right-hand bottom corner the public vanity address with QR code is displayed. The paper wallets can be stored physically as an alternative to electronic storage of private keys. Multisignature addresses As the name implies, these
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name suggests, are installed on mobile devices. They can provide various methods to make payments, most notably the ability to use smartphone cameras to scan QR codes quickly and make payments. Mobile wallets are available for the Android platform and iOS, for example, Blockchain, breadwallet, Copay, and Jaxx. Jaxx mobile wallet The
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solutions can be used, whereas in traditional, physical shops, point of sale terminals and other specialized hardware can be used. Customers can simply scan the QR code with the seller's payment URI in it and pay using their mobile devices. Bitcoin URIs allow users to make payments by simply clicking on
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links or scanning QR codes. Uniform Resource Identifier (URI) is basically a string that represents the transaction information. It is defined in BIP 21. The QR code can be displayed near the point of the sale terminal. Nearly all Bitcoin wallets support
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example, US Dollars Once the value is entered in the system the terminal prints a receipt with QR code on it and other relevant information such as amount The customer can then scan this QR code using their mobile Bitcoin wallet to send the payment to the Bitcoin address of the seller embedded within
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the QR code Once the payment is received on the designated Bitcoin address, a receipt is printed out as a
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users, Bashir and Irshad. If Irshad requests money from Bashir, then she can send a request to Bashir by using QR code. Once Bashir receives this request he will either scan the QR code or manually type in Irshad's Ethereum address and send Ether to Irshad's address. This request is encoded as
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a QR code shown in the following screenshot which can be shared via email, text or any other communication methods. You can download
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Jaxx wallet from https://jaxx.io. QR code as shown in the blockchain wallet application Once Bashir receives this request
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he will either scan this QR code or copy the Ethereum address in the Ethereum wallet software and initiate a transaction. This process is
Deadly Quiet City: True Stories From Wuhan
by Murong Xuecun · 7 Mar 2023 · 236pp · 73,008 words
the southwest, hundreds of millions of Chinese people must report their location and status to the government like criminals on parole. Everyone has a personal QR code which is required to prove you are legal and uninfected just to be able to take subway journeys, enter restaurants, or shop at supermarkets. No
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. When the day comes that COVID-19 is no longer a pandemic, Xi Jinping will not relinquish ruling by QR code. It will shackle China for a long time to come because the QR codes report people’s movements; and when required it can be changed to ensure that ‘petitioners’ and dissidents, as well
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congregants, have no options to seek justice. This is an advanced technology for controlling people that even George Orwell never imagined. Every few days, uncomplaining ‘QR code citizens’ line up at booths inside which there is a person, or sometimes a robot. They then squat down, open their mouths, and wait for
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be discriminated against and cold-shouldered for a long time. Even after being completely cured, they wouldn’t be able to work or travel. The QR code that everyone must carry would remind everyone they encounter. Look out! Here’s an infected person, a dangerous and unclean infected person. Some observers outside
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. Not long after the epidemic broke out, the Communist Party rolled out its ‘rule by QR code’. First in Zhejiang and then nationwide, every Chinese citizen has to live a QR-code life. They must swipe their own QR code to get on a bus, a subway or a taxi, and at train stations and restaurants
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bloom, Yang Min is still living under surveillance and house arrest. Across the nation, at malls, supermarkets, train stations and airports, everyone has to scan QR codes to record their health details, movements and modes of transport. Yang Min suspects her mobile phone has been tampered with. ‘I can never scan the
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QR codes,’ she says. ‘Other people scan just once, but when I try, it just keeps on spinning, but nothing ever appears on the display.’ Almost inaudibly,
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(c)(3) nonprofit organization; if you wish to support our work with a tax-deductible gift please visit www.thenewpress.com/donate or use the QR code below. © 2022 by Murong Xuecun Preface © 2023 by Murong Xuecun All rights reserved. No part of this book may be reproduced, in any form, without
Lonely Planet Egypt
by Lonely Planet · 476pp · 132,840 words
is a necropolis dedicated to ancient Egypt’s 4th dynasty so take your time and explore beyond the major monuments. KANUMAN/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Great Pyramid of Khufu Interior of the Great Pyramid Sphinx Pyramid of Menkaure Pyramid of Khafre Tomb
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its galleries (an ongoing process), creating a more approachable space for you to explore the riches within. Sphinx of Hatshepsut | LEXOSN/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Narmer Palette Limestone statue of Zoser Statue of Khafre Wooden statue of Ka-Aper Death masks of
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. Even with half the site out of bounds, though, you’ll need a good two hours to get through everything. WITR/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. WHAT’S OPEN? On our last visit only the Mosque of Mohammed Ali, Mosque of An Nasir Mohammed, the two
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, finely carved and painted tombs, and catacombs for sacred bulls make for Cairo’s best day out. Hypostyle hall | LEONID ANDRONOV/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Step Pyramid Mastaba of Ti Tomb of Mereruka Serapeum Tomb of Kagemni Tomb of Maya Pyramid of
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. At the moment, there is nowhere else in the country where ancient Egypt’s artistry feels so alive. Hathor columns | NATSUMI/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Ceiling paintings of sky goddess Nut Western stairway reliefs Osiris and Isis scenes on the roof Reliefs
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of Places) – was Egypt’s most significant place of worship. Today it’s a highlight of a Luxor visit. MATYAS REHAK/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS View from the first pylon Great Hypostyle Hall Obelisk of Hatshepsut Sanctuary of Amun Sacred Lake Open
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temple marks the spot where Horus defeated his murderous uncle, Seth, to avenge the death of his father Osiris. FABIO IMHOFF/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Pylon carvings of Ptolemy XII smashing the skulls of his enemies The granite statues of Horus at
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unique in being dedicated to two gods: Sobek and Haroeris, his brother, otherwise known as Horus the Elder. EMILY MARIE WILSON/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS Well-preserved carvings of Sobek on the columns in the Hypostyle Hall The Festival Calendar Cartouche of
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higher ground in 1968 to save them from being submerged by the rising waters of the High Dam. EMILY MARIE WILSON/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DID YOU KNOW? The original temple was aligned in such a way that on the 21st of February and October
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now one of Egypt’s major cultural venues, a centre of scholarship and home to a collection of interesting museums. STUKKEY/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DON’T MISS The exterior architecture and view of the sea The main reading hall The Manuscript Museum The Modern
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October 1942. There are also memorials to the fallen Axis forces of Italy and Germany, and a small military museum. MAGUEDM/SHUTTERSTOCK © PRACTICALITIES Scan this QR code for prices and opening hours. DID YOU KNOW? The 1942 victory at El Alamein was the first time British and Commonwealth forces defeated Axis forces
The Launch Pad: Inside Y Combinator, Silicon Valley's Most Exclusive School for Startups
by Randall Stross · 4 Sep 2013 · 332pp · 97,325 words
startups. So too does Envolve, a chat service that can be integrated into any other company’s Web site, and Paperlinks, which helps companies use QR codes in their marketing materials. The founders of TightDB, Alexander Stigsen and Bjarne Christiansen, are not close to completing work on the TightDB software, but they
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NFC.” “So this is what we were thinking about,” Taggar says. “This whole outdoor advertising angle? We wouldn’t just be NFC. It would be QR codes and SMS and near-field. This came up in our conversation with Sequoia.” A partner with the venture capital firm had told them, “There’s
…
shit? Bus stop advertising!” “On the guerrilla side of that, we’ve actually printed up these labels, which are like, ‘Tap here’ or ‘Scan a QR code.’ We’re going to put them up on MUNI stops around San Francisco. Just to see what people do.” Geoff Ralston speaks up. “Aren’t
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a lot of people doing that kind of thing?” He knows that there is a startup in this batch that is doing QR codes—Paperlinks. “Isn’t that really a crowded space? Or becoming one?” Graham tries to turn the conversation back to the question: how is the company
…
it off?” “Ten centimeters,” says Taggar. “It depends on the size of the thing.” Ralston reviews Tagstand’s strategic options. Move to outdoor advertising and QR codes. Go international. Or simply hunker down and try to survive doing what they are currently doing, selling small lots of tags used as experiments by
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be irrelevant.” “NFC seems like it’s going to be something real, more so than maybe QR codes,” says Buchheit. “Because it’s useful for payments or whatever.” “I guess so,” says Ralston. “The thing about QR codes is I’m starting to see them in places that are really surprising to me.” “They
…
more practical, as he imagines using it to pay for things or unlock the door of his house with a wave of his cell phone. “QR codes are so much cheaper than these things. So much cheaper,” says Graham. Ralston is unconvinced that tapping an NFC tag is considerably easier than scanning
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a QR code. Not so, says Buchheit. NFC is nothing but a tap. But a QR code requires several steps: “Let me unlock my phone, launch the app that does that, line it up—it’s
…
to have NFC. So it’s not necessarily now or four years. It might be a year.” This does sound promising. The partners return to QR codes and outdoor advertising, the direction in which Tagstand had said a few minutes earlier that it wants to head. “Remember the CueCat?” Buchheit asks the
…
you said, ‘This is extraordinarily stupid.’ You knew it immediately.” He does not feel the same about scanning QR codes, though. “Oh, no, no,” says Buchheit, making clear he did not mean to imply that QR codes are the same as the CueCat. “But it’s that same dream, ‘Oh, this is great, ’cause
…
to which their customers want to interact with the advertisements.” Ralston gets his phone out to see how long it takes him to scan a QR code. He succeeds quickly. “That was surprising,” Graham says, impressed. Buchheit tries it himself but does not succeed as quickly. Whether the
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QR code is easy to scan or not, Ralston does not want to see Tagstand pursue QR codes and outdoor advertising simply because the founders regard it as a decent business opportunity for the moment. They
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: Software for analyzing the fans that come to a business’s Facebook page Acquired by Unified Pandav: (See Embark) Paperlinks: Infrastructure for businesses that use QR codes Parse: Stores data in the cloud for developers of mobile apps Paystack: Online payment system for kids to use After YC, pivoted to work on
…
, 41 Portland, OR, 223 Posterous, 63, 147 PostgreSQL, 137 PowerPoint, 36 Pristavec, Venetia, 104 Procter & Gamble, 208 Providence, RI, 42 Puff Daddy, 164 Python, 124 QR codes, 152–53, 156–58 QuickBooks, 53 Quicken, 53 Rackspace, 101, 131 Rails, 122 Ralston, Geoff, 151–58 Rap Genius Altman, Sam, 196–202 Demo Day
Paintwork
by Tim Maughan · 28 Jul 2011 · 106pp · 30,173 words
about depth a lot. Depth, perspective. How to force and manipulate both. It is what he is best known for, second to being the best QR Code writer in South Bristol. Take the billboard in front of him right now, for example. It is meticulous, unblemished. The red and white of its
…
generic Coca-Cola design seems to shimmer under its protective nano-gloss. All around it though is chaos; every inch of wall is covered in QR Codes – some on stickers, some stencilled – until their matrix of barcodes has merged together to produce a disorientating mess of black and white pixels, like an
…
, sprawling mass. He doesn’t want to trigger a bombing or a throwup, and anyway he put most of them there. He knows where the QR Codes lead – the few that aren’t long dead links, at least – and he has no interest in his view being filled with flat flyers for
…
the other. So he waits for Tera’s signal before moving, and as he does he lets his eyes fall onto the billboard’s own QR Code, a thirty centimetre square black and white grid, shimmering under the protective nano-gloss. Untouched, unblemished. He focusses on it, and double-blinks acceptance. The
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him is passive, the girl trapped behind the wall of nano-gloss and beetle juice, waiting for his gaze to fall once again on the QR code. He resists, and waits. Something chimes behind his left ear, and in the top right of his periphery an icon appears. A cartoon head - goatee
…
the pack, initially grabbing and unrolling the first stencil. It’s of an empty square, perfectly cut to the same size as the billboard’s QR code. Then his other hand goes back in the bag, and out comes the aerosol of white beetle juice. His left hand struggles to hold the
…
onto the stencil. Quickly the beetle juice, the only thing 3Cube knows of that will actually stick to the nano-gloss, starts to obliterate the QR code until only a perfectly-formed white square is left. Then both hands are back in his bag. First out is the second stencil, followed by
…
near panic. He momentarily closes his eyes and focusses again. Gently he peels away the second stencil, and allows himself a little smile – the resulting QR code looks perfect, indistinguishable from the billboard’s own at first glance. And one glance is all it takes. 3Cube makes sure everything is back in
…
wearing spex. From where he’s standing he’s at a right angle to the actual billboard, and can’t see the ad or his QR code. Instinctively he darts across the road, oblivious to the angry beeps of the rush-hour traffic, so he can get a clear view. It looks
…
yet tell; there’s a signature, but it's written in indecipherable wild-style hieroglyphs. Right across his perfectly crafted, and now so effectively destroyed, QR code. 3Cube is frozen to the spot, numb, when a dirty looking minivan with an animated JCDecaux logo on its side pulls up to the kerb
…
, he thinks, there can be only one thing it is interested in, as it continues its horrific crawling descent to where his already near-obliterated QR code sits. It waits for a second, until the little man from JCDecaux air-types some more commands. And then, with the sort of machine precision
…
artist, it starts to spray short bursts of beetle juice from where its mandibles should be, white and black, gradually recreating the original ad’s QR code. His work is gone. The signature is gone. But the anonymous signatory’s art still remains, as bold and stark as ever. As if to
…
Nikes slip on damp steel as he clambers back down the fire escape. Safely on the ground he gazes back up at his freshly juiced QR code and activates it. Instead of a hole being blown through the billboard, this time cracks start to spread across its glossy surface – slowly at first
…
. Even the beetle is quiet now. 3Cube glances up. The beetle has stopped moving, even though it's a good six feet away from his QR Code. It’s frozen in place, and 3Cube wonders if it is broken. The silence is broken by more scratching and clanking. Another beetle has emerged
…
the Halfords bag make a clinking sound as 3Cube drops it on entering his room. Next he’s ripping shit down from his wall; old QR Code stickers, pictures of Brazilian porn stars, the faded, tea-stained poster of Leo Kim. Within a few minutes he’s cleared a section of wall
Designing Search: UX Strategies for Ecommerce Success
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