Qr example - QR decomposition writteninmatrixform: A = QR ,whereA 2 R m n,Q 2 R m n,R 2 R n: a 1 a 2 a n | {z } A = q 1 q 2 q n | {z } Q 2 6 6 4 r 11 r 12 r 1 n 0 r 22 r 2 n 0 0 r nn 3 7 7 5 | {z } R I Q TQ = I ,andR isuppertriangular&invertible I calledQR decomposition (orfactorization)ofA I usually computed using a variation on Gram-Schmidt procedure which is less sensitive …

 
May 14, 2023 · QR.Flutter is a Flutter library for simple and fast QR code rendering via a Widget or custom painter. ... example Flutter app in the /example directory. You can use ... . Airfare to london from nyc

2. I'm using Zebra ZPLII to create a label with a QR code to open an specific url. When I use iPhone camera to scan the QR phone shows "unusable data" and when I try with an external QR reader the text extracted from the QR is not the same from the label. For example if I write www.google.com the string that I have from reading the QR is ...For example, when this QR code is scanned it will redirect you to the Defender for Office 365 product page. QR Code Phishing on the Rise. Over the last few years QR Codes have seen a rise in popularity in legitimate use scenarios, in part due to COVID. You have probably seen them in restaurants, parking lots, and marketing.What is a QR Code? A QR Code is 2 dimensional Bar code which was initially designed in 1994 for the automobile industry in Japan. It’s an optical coded label that can be decrypted and read by machines. Generating your own QR Code. You can start this example by creating your own QR Code. Visit this website here and insert a sample text or url.Find & Download Free Graphic Resources for Qr Code Png. 100,000+ Vectors, Stock Photos & PSD files. Free for commercial use High Quality ImagesExample: QR decomposition of a 4x6 matrix. Case when the columns are not independent. When the columns of are not independent, at some step of the G-S procedure we encounter a zero vector , which means is a linear combination of .The modified Gram-Schmidt procedure then simply skips to the next vector and continues.. …this is my working example Java code to encode QR code using ZXing with UTF-8 encoding, please note: you will need to change the path and utf8 data to your path and language characters. package com.mypackage.qr; import java.io.File; import java.io.IOException; import java.io.UnsupportedEncodingException;While initial testing of 30 samples passed a validity test, it would take another year and more than 200 samples to obtain statistically significant results, …Feb 6, 2024 · For example, if you use an Image Gallery QR Code, you can upload multiple images, choose which image to highlight, add further info about your business, and even include a call-to-action (CTA) button that directs users to a website or landing page. With QR Codes, you never have to settle for something that doesn’t align with your marketing ... A QR code generator for React and React Native.. Latest version: 2.0.12, last published: 8 months ago. Start using react-qr-code in your project by running `npm i react-qr-code`. There are 172 other projects in the npm registry using react-qr-code. How to generate a QR code. Click "Generate a QR code," and you'll be redirected to the QR code app on Canva. Choose between using the QR code generator in a new or an existing design. If you're already on the Editor, go to the Apps tab on the left sidebar and search for "QR Code" or go to the "Create something new section," then select "QR Code." For example, according to the Better Business Bureau (BBB), a now-common scam involves sticking fraudulent QR codes on parking meters to trick drivers into sharing financial credentials when they try to pay for parking. The BBB has warned consumers they could encounter QR code scams in emails, in text messages, on …For example, brands can use QR codes in advertising campaigns to link customers to online content or in event tickets to provide access to personalized information. Static vs dynamic QR code. Static QR code. A static QR code contains a fixed destination since it stores data directly onto the pattern. You can’t change its data after you’ve ... A QR code. That QR codes encode and provide information along two axes (up-and-down and side-to-side) has numerous benefits. Speed is one of the most impactful; in fact, QR codes were invented in 1994 primarily to increase scanning speed. See our QR code vs barcode post for more information between the two. 4 QR Factorization 4.1 Reduced vs. Full QR Consider A ∈ Cm×n with m ≥ n. The reduced QR factorization of A is of the form A = QˆR,ˆ where Qˆ ∈ Cm×n with orthonormal columns and Rˆ ∈ Cn×n an upper triangular matrix such that Rˆ(j,j) 6= 0, j = 1,...,n. As with the SVD Qˆ provides an orthonormal basis for range(A), i.e., the ...QR.Flutter is a Flutter library for simple and fast QR code rendering via a Widget or custom painter. - theyakka/qr.flutter. ... There is a simple, working, example Flutter app in the /example directory. You can use it to play with all the options. Also, the following examples give you a quick overview on how to use the library. ...Download scientific diagram | An example of QR code from publication: The use of alignment cells in MMCC barcode | The QR code, a monochrome 2D barcode, is a popular and commonly used barcode ...Free QR Code Generator. Generate in under 30 seconds. Unlimited use of our QR Code Scanner. User Guide. 1. Data type. Popular. Website URL. Plain Text. …Creating a QR Code step by step. This JavaScript demo application visualizes in detailed steps, how a text string is encoded into a QR Code barcode symbol. The content of this …Dec 17, 2023 · Click the Generate Dynamic QR Code button to create the QR code. The dynamic QR code allows you to update its content, eliminating the need and hassle of creating a new QR code for different purposes. Jan 16, 2024 · Here is a list of 31 actions that you can get your audience to take: 1. See a webpage. A Website URL QR Code is one of the most common types of QR Codes. By creating a website QR Code, you can drive traffic to your website. Just enter the page URL and create your QR Code. As people scan it, they will be taken to visit the encoded page. QR TIGER, the free QR code generator online, offers numerous QR code solutions that you can effectively use for your flyers and brochures. Here are some of the practical ideas for your brochures and flyers with QR code campaign. Feel free to scan these QR code flyer example to see how they actually work: 1. Portal to online stores and …Learn how to create QR Codes for different purposes, such as URL, vCard, SMS, WiFi, and more. Customize your QR Codes with colors, frames, and logos, and track their …Example Generating AIM QR-Code with FNC1 in Second Position. When generating AIM QR-Code symbols, the first AI is required directly after the ~2 in parentheses. The parentheses will not be encoded and are only used to encode the first AI within the symbol. If additional FNC1s need to be encoded, they should be encoded as ~2 in any mode.QR TIGER, the free QR code generator online, offers numerous QR code solutions that you can effectively use for your flyers and brochures. Here are some of the practical ideas for your brochures and flyers with QR code campaign. Feel free to scan these QR code flyer example to see how they actually work: 1. Portal to online stores and …QR Code Explained. QR is a two-dimensional or matrix code that can encode up to 4,000 characters or 7,000 digits. The code is easily recognized by the characteristic three finder patterns in the corners of the symbol: Those patterns are quite large, so the code needs more space than other 2D symbologies, at least with small amounts of data.For example, a QR code may contain a video file, a URL file, a PDF, word file that presents information to the end-user when the QR is scanned using the mobile device. However, like all of the technological advancement that is surging every now and then, it will always require doing a test to see how it works, how it works, and how it should. ...Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the companyFind & Download Free Graphic Resources for Qr Code. 99,000+ Vectors, Stock Photos & PSD files. Free for commercial use High Quality ImagesFor example: If you have an App in the Apple and Google Play Store you need just one QR Code. ... QR Codes are created using a QR Code generator that encodes the information for a QR Code reader. The QR Codes can then be read with almost any smartphone that has an integrated camera.Aug 12, 2021 · Here’s how: Open the camera app. Select the rear-facing camera in Photo or Camera mode. Center the QR code that you want to scan on the screen and hold your phone steady for a couple of seconds ... QR Code Example: This is a sample Plain Text QR Code with just words: Plain text QR Code can fit up to 300 alphanumeric characters: It can also include special characters such as a comma, @ symbol, and much more! And yes, you can also add emojis 😀 instead of :-) to make it more fun 😍Frequently Asked Questions. What is a QR Code and how does it work? The quick response, or QR, Code is a two-dimensional version of the Barcode able to convey a …ESP32-S3 QR Code Recognition Demo. This example project demonstrates how an ESP32-S3 can be used to scan QR codes. This demo is an ESP-IDF application. Aside from ESP-IDF, it relies on several components from IDF Component Registry: espressif/esp32-camera — to obtain an image from the camera. espressif/esp32_s3_eye — board …QR Code, a type of bar code that consists of a printed square pattern of small black and white squares that encode data which can be scanned into a computer system. The black and white squares can represent numbers from 0 to 9, letters from A to Z, or characters in non-Latin scripts such as Japanese kanji.. QR Codes were developed …For example, if you are planning to print your QR code in a billboard type, SVG format is the best option. PNG Portable Network Graphics is a format to use online but can also be printed, although a PNG has less quality than an SVG. It is a raster graphics file format that supports lossless data compression.This subroutine computes the QR factorization of a general matrix. A = QR. where: For SGEQRF and DGEQRF, Q is an orthogonal matrix. For CGEQRF and ZGEQRF, Q is a unitary matrix. For m ≥n, R is an upper triangular matrix. For m < n, R is an upper trapezoidal matrix. Table 1. Data Types.The system, which will be managed by Malaysia’s Immigration Department, will involve workers using a unique QR code to cross immigration instead of having their …ESP32-S3 QR Code Recognition Demo. This example project demonstrates how an ESP32-S3 can be used to scan QR codes. This demo is an ESP-IDF application. Aside from ESP-IDF, it relies on several components from IDF Component Registry: espressif/esp32-camera — to obtain an image from the camera. espressif/esp32_s3_eye — board …Apr 4, 2024 · 4. QR Code link example: L’Oreal engages customers on the go with QR Codes. Another example of brands using QR Codes is when L’Oreal partnered with Glamour and used QR Codes inside taxis to capture customers stuck in traffic. The campaign promoted the range of Lancôme and Yves Saint Laurent product lines by linking QR Code campaigns to ... PHP QR Code is open source (LGPL) library for generating QR Code, 2-dimensional barcode. Based on libqrencode C library, provides API for creating QR Code barcode images (PNG, JPEG thanks to GD2). Implemented purely in PHP, with no external dependencies (except GD2 if needed). ... Because main purpose of this demo is provide …Learn how to make a QR code for various purposes, such as websites, forms, or phone calls, using online generators or Chrome. Find out how to optimize …Find React Qr Scanner Examples and Templates. Use this online react-qr-scanner playground to view and fork react-qr-scanner example apps and templates on CodeSandbox. Click any example below to run it instantly or find templates that can be used as a pre-built solution! react React example starter project. react-qr-reader4.4 QR Factorization 4.1 Reduced vs. Full QR Consider A ∈ Cm×n with m ≥ n. The reduced QR factorization of A is of the form A = QˆR,ˆ where Qˆ ∈ Cm×n with orthonormal columns and Rˆ ∈ Cn×n an upper triangular matrix such that Rˆ(j,j) 6= 0, j = 1,...,n. As with the SVD Qˆ provides an orthonormal basis for range(A), i.e., the ...Feb 28, 2024 · These pixelated black-and-white squares may seem simple at first glance, but their versatility and effectiveness in marketing campaigns are remarkable. Let’s delve into some compelling examples of QR Codes in marketing and how they are revolutionizing marketing strategies across various industries. 1. Restaurants and food chains. Householder QR. Householder transformations are simple orthogonal transformations corre- sponding to re ection through a plane. Re ection across the plane orthogo- nal to a unit normal vector vcan be expressed in matrix form as H= I 2vvT: At the end of last lecture, we drew a picture to show how we could construct a re ector that maps a given ...May 14, 2023 · QR.Flutter is a Flutter library for simple and fast QR code rendering via a Widget or custom painter. ... example Flutter app in the /example directory. You can use ... chillerlan/php-qrcode. A PHP QR Code generator based on the implementation by Kazuhiko Arase, namespaced, cleaned up, improved and other stuff. It also features a QR Code reader based on a PHP port of the ZXing library. Attention: there is now also a javascript port: chillerlan/js-qrcode.1. Directing Customers to a Landing Page or Website. 2. A Quick Way to Download an App. 3. An Easy Way to Pass on Your Business Details. 4. Use a QR …Integer, Example = 10 A.K.A frame per second, the default value for this is 2 but it can be increased to get faster scanning. Increasing too high value could affect performance. ... This also enables scanning QR code using the front camera on mobile devices which are sometimes mirrored. This is false by default and I recommend changing this ...QR Code, a type of bar code that consists of a printed square pattern of small black and white squares that encode data which can be scanned into a computer system. The black and white squares can represent numbers from 0 to 9, letters from A to Z, or characters in non-Latin scripts such as Japanese kanji.. QR Codes were developed …Write a Code to Generate a QR code. Now, let's create a simple C# program to generate a QR code using the IronQR library. First, import the necessary namespaces: using IronQr; using IronSoftware.Drawing; Next, you can define a method to generate a QR code and save it as an image file: static void Main(string[] args) {.By endroid. This Symfony bundle lets you generate QR Codes using the endroid/qr-code library. It provides the following features: Configure your defaults (like image size, default writer etc.) Support for multiple configurations and injection via aliases. Generate QR codes for defined configurations via URL like /qr-code//Hello.The best selection of Royalty Free Scan Qr Sample Vector Art, Graphics and Stock Illustrations. Download 240+ Royalty Free Scan Qr Sample Vector Images.Open Chrome and navigate to the web page you want to link to with your QR code. Click the Share icon in the URL bar (it looks like a square with an upward-facing arrow). You'll see a QR code icon and the words Create QR Code on the right side. Click on it. Chrome will generate a QR code, ready for you to save and share.Create a New Android Application Project. Tip. You may skip project creation and jump directly to the beginning of the example below. Open Eclipse IDE and go to File → New → Project → Android Application Project. Figure 1. Create a new Android project. Specify the name of the application, the project and the package and then click Next ...Frequently Asked Questions. What is a QR Code and how does it work? The quick response, or QR, Code is a two-dimensional version of the Barcode able to convey a …Creating a QR Code step by step. This JavaScript demo application visualizes in detailed steps, how a text string is encoded into a QR Code barcode symbol. The content of this … Encode text as a QR Code. WIFI QR Code. Used to give WIFI access. Bookmark QR. Used to bookmark an URL . Auto QR. Used to display an URL. Proudly powered by WordPress . Suitable for established business, enjoy all support and unlimited items. 1 digital menu. Unlimited items per menu. Full menu customization. Unlimited QR Scans. Support converting PDF menu to digital. Custom domain. Custom menu …QR Code Explained. QR is a two-dimensional or matrix code that can encode up to 4,000 characters or 7,000 digits. The code is easily recognized by the characteristic three finder patterns in the corners of the symbol: Those patterns are quite large, so the code needs more space than other 2D symbologies, at least with small amounts of data.Open Chrome and navigate to the web page you want to link to with your QR code. Click the Share icon in the URL bar (it looks like a square with an upward-facing arrow). You'll see a QR code icon and the words Create QR Code on the right side. Click on it. Chrome will generate a QR code, ready for you to save and share.Feb 6, 2024 · For example, if you use an Image Gallery QR Code, you can upload multiple images, choose which image to highlight, add further info about your business, and even include a call-to-action (CTA) button that directs users to a website or landing page. With QR Codes, you never have to settle for something that doesn’t align with your marketing ... Learn how to create QR Codes for different purposes, such as URL, vCard, SMS, WiFi, and more. Customize your QR Codes with colors, frames, and logos, and track their …To create a QR code for wedding RSVP, use a QR code generator like QR TIGER. Visit the QR TIGER website, select the QR code type (e.g., Google Form), customize it with event details, generate the code, and share it with your guests. They can scan it with their smartphones to confirm attendance. Easy and efficient. Written by a …Integer, Example = 10 A.K.A frame per second, the default value for this is 2 but it can be increased to get faster scanning. Increasing too high value could affect performance. ... This also enables scanning QR code using the front camera on mobile devices which are sometimes mirrored. This is false by default and I recommend changing this ...Creating a QR Code step by step. This JavaScript demo application visualizes in detailed steps, how a text string is encoded into a QR Code barcode symbol. The content of this …In the Email field, enter the target or the recipient’s email address. This email address will be used to receive emails sent by scanning this QR Code. If you must, you can also add multiple email addresses separated by a comma. For example, [email protected], [email protected], [email protected]. Next, enter the subject of the email.Apr 4, 2024 · 4. QR Code link example: L’Oreal engages customers on the go with QR Codes. Another example of brands using QR Codes is when L’Oreal partnered with Glamour and used QR Codes inside taxis to capture customers stuck in traffic. The campaign promoted the range of Lancôme and Yves Saint Laurent product lines by linking QR Code campaigns to ... QR decomposition has following formula: A = QR, where: A is original matrix we want to decompose. Q is orthogonal matrix. R is upper triangular matrix. Main goal is rather simple, decompose matrix into matrices Q and R. To find a orthogonal matrix Q, we could used Gram-Schmidt process. This process takes input matrix and makes …1. QR Code advertising examples: Taco Bell makes QR Codes edible. Taco Bell has been incorporating QR Codes as part of its promotional campaigns for quite a …Generally, you are required to provide details of the DuitNow QR payment made such as date, time, amount and receipt or reference number of the payment. Additionally, you may also be asked to provide details of the Merchant such as store name, location, reason for the dispute or request for refund and/or and any other information as deemed ...Feb 28, 2024 · These pixelated black-and-white squares may seem simple at first glance, but their versatility and effectiveness in marketing campaigns are remarkable. Let’s delve into some compelling examples of QR Codes in marketing and how they are revolutionizing marketing strategies across various industries. 1. Restaurants and food chains. QR Code Scanner. is a handy application for scanning a QR code with a smartphone. Create codes with our free QR generator of codes. Comprehensible interface, variety in choosing the type of your QR-code, the ability to view statistics! Easy QR code maker. Create QR code in two clicks: 👉 upload your link, 👉 generate QR and 👍 download it! 4. McDonald's QR Code Commercial Campaign. A global leader in fast food, McDonald's has always been at the forefront of implementing cutting-edge marketing techniques. They used QR codes well in ...Creating a QR Code step by step. This JavaScript demo application visualizes in detailed steps, how a text string is encoded into a QR Code barcode symbol. The content of this … A QR code. That QR codes encode and provide information along two axes (up-and-down and side-to-side) has numerous benefits. Speed is one of the most impactful; in fact, QR codes were invented in 1994 primarily to increase scanning speed. See our QR code vs barcode post for more information between the two. QR TIGER, the free QR code generator online, offers numerous QR code solutions that you can effectively use for your flyers and brochures. Here are some of the practical ideas for your brochures and flyers with QR code campaign. Feel free to scan these QR code flyer example to see how they actually work: 1. Portal to online stores and …4. In order to create the QR code image, you will need to generate a bitmap in your application. Sample code to do this is: 'Create a new QR bitmap image. Dim bmp As New Bitmap(21, 21) 'Get the graphics object to manipulate the bitmap. Dim gr As Graphics = Graphics.FromImage(bmp)The flowers and plants are labelled with small labels. To make the labels, we use ZPL codes. On the labels we use a barecode which gives the data about the plants. My project is to change that barcode into a QR code. Now we use this ZPL to create the barcode: ^XA. ^FO100,63^ABB,30,18^FDBRAZIL^FS. Encode text as a QR Code. WIFI QR Code. Used to give WIFI access. Bookmark QR. Used to bookmark an URL . Auto QR. Used to display an URL. Proudly powered by WordPress . You can find the full article on QR code tracking on Microsoft Docs. The following is a breakdown of each C# script in the sample app: QRCode.cs - This script is attached to the QR code object and populates the text displayed in the scene with the QR code properties on Start.. QRCodesManager.cs - This is the main class that handles the QR SDK, …Right-click on the page. Select “Create QR Code for this Page”. Download the QR code. You’ll notice the QR code has a dinosaur in the middle of the interior. If you’re using the code for marketing materials, this method might not work best, but if you need the code for quick, simple access, it can work perfectly.EPC QR code. The European Payments Council Quick Response Code guidelines define the content of a QR code that can be used to initiate SEPA credit transfer (SCT). It contains all the necessary information in clear text. These QR code guidelines are used on many invoices and payment requests in the countries that support it (Austria, Belgium ...Sample API crypto QR code output of URL above. Now just replace the example Bitcoin address with your own or change the crypto style to represent the type of crypto you need to generate a QR code for. Once you obtain the API URL address, integrating it into your website or (d)app is a breeze. Simply use the APIs URL as the image location.QR Code, a type of bar code that consists of a printed square pattern of small black and white squares that encode data which can be scanned into a computer system. The black and white squares can represent numbers from 0 to 9, letters from A to Z, or characters in non-Latin scripts such as Japanese kanji.. QR Codes were developed …

Generally, you are required to provide details of the DuitNow QR payment made such as date, time, amount and receipt or reference number of the payment. Additionally, you may also be asked to provide details of the Merchant such as store name, location, reason for the dispute or request for refund and/or and any other information as deemed .... Coloring book app

qr example

QR Code Model 1 and 2: This is the QR Code we see on a daily basis. More than 30+ different types of QR codes can be created for business or personal use. Some of these QR Codes are more suited to a particular QR Code use case, whereas some can help your QR Code marketing endeavors. Some of the most common types of QR Codes include: URL QR Code. These samples demonstrate how to build apps for the different classes of digital eyewear devices. The Unity samples for HoloLens 2 and Magic Leap 2 show how to attach an AR experience to an Images, Model Targets and VuMarks. The Vuzix M400 and RealWear HMT-1 is supported similar to any Android device with the samples in the Core Features …ZXing TypeScript Examples. ZXing ("zebra crossing") TypeScript is an open-source, multi-format 1D/2D barcode image processing library ported to TypeScript from Java. The library can be used from browser or from node. Below are links to browser demo & examples. More information can be found in GitHub project home page .For example, if you run IT consultancy like Computers in the City, you might want to consider requiring certificates with QR codes from your potential employees. Banking: Banks and financial institutions can use QR codes to send banking information, such as deposit certificates securely.orthogonal, for example at the first step: ... • Compute the factor R of a QR factorization of m × n matrix A (m ≥ n) • Leave result in place of A, store reflection vectors vk for later use Algorithm: Householder QR Factorization for k = 1 to n . x = A. k:m,k v. k = sign(x 1An example of QR Code campaign tracking with QR Code Generator PRO. Seamless connection between print and digital. Contrary to common belief, print advertising isn’t dead. Print marketing tools like flyers, brochures, and business cards still contribute to the success of marketing campaigns because they create tactile connections and build ...Example: QR decomposition of a 4x6 matrix. Case when the columns are not independent. When the columns of are not independent, at some step of the G-S procedure we encounter a zero vector , which means is a linear combination of .The modified Gram-Schmidt procedure then simply skips to the next vector and continues.. …Apr 4, 2024 · 4. QR Code link example: L’Oreal engages customers on the go with QR Codes. Another example of brands using QR Codes is when L’Oreal partnered with Glamour and used QR Codes inside taxis to capture customers stuck in traffic. The campaign promoted the range of Lancôme and Yves Saint Laurent product lines by linking QR Code campaigns to ... EPC QR code. The European Payments Council Quick Response Code guidelines define the content of a QR code that can be used to initiate SEPA credit transfer (SCT). It contains all the necessary information in clear text. These QR code guidelines are used on many invoices and payment requests in the countries that support it (Austria, Belgium ...Abstract — QR i.e. “Quick Response” code is a 2D matrix code. that is designed by keeping two points under consideration, i.e. it. must store large amount of data as compared to 1D barcodes ... This allows you to set dynamic QR box dimensions based on the video dimensions. See this blog article for example: Setting dynamic QR box size in Html5-qrcode - ScanApp blog. This might be desirable for bar code scanning. If this value is not set, no shaded QR box will be rendered and the scanner will scan the entire area of video stream. In the Email field, enter the target or the recipient’s email address. This email address will be used to receive emails sent by scanning this QR Code. If you must, you can also add multiple email addresses separated by a comma. For example, [email protected], [email protected], [email protected]. Next, enter the subject of the email.QR code-based identity documents and the threat of QR code attacks. In some instances, organizations and governments are considering the use of QR codes …Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Talent Build your employer brand ; Advertising Reach developers & technologists worldwide; Labs The future of collective knowledge sharing; About the company A QR code. That QR codes encode and provide information along two axes (up-and-down and side-to-side) has numerous benefits. Speed is one of the most impactful; in fact, QR codes were invented in 1994 primarily to increase scanning speed. See our QR code vs barcode post for more information between the two. QR decomposition: examples. This matrix is full column rank. Indeed, the matlab command [Q,R]=qr (A,0) yields a and a : This shows that is full column rank since is invertible. ( is not full column rank, as it was constructed so that the last column is a combination of the first and the third.) We observe that the last triangular element is ... .

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