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Secure Digital

Secure Digital
Secure Digital (SD) is a nonvolatile memory card used extensively in portable devices, such as mobile phones, digital cameras, GPS navigation devices, handheld consoles, and tablet computers. The Secure Digital standard was introduced in August 1999 as an evolutionary improvement over MultiMediaCards (MMC). The Secure Digital standard is maintained by the SD Association (SDA). SD technologies have been implemented in more than 400 brands across dozens of product categories and more than 8,000 models.[1] The Secure Digital format includes four card families available in three different form factors. There are many combinations of form factors and device families, although as of 2013, the prevailing formats are full- or micro-size SDHC and full/micro SDXC. The SDA uses several trademarked logos to enforce compliance with its specifications and assure users of compatibility.[5] Overview[edit] SD[edit] SDHC[edit] SDXC[edit] exFAT filesystem[edit] Ultra High Speed bus[edit] SDIO[edit] Speeds[edit]

Difference between Speed Class, UHS Speed Class, and Speed Ratings (performance) for SD/SDHC/SDXC cards Difference between Speed Class, UHS Speed Class, and Speed Ratings (performance) for SD/SDHC/SDXC cards What is the difference between Speed Class and Speed Ratings for SDTM/SDHCTM cards? The speed rating measures maximum transfer speed for reading and writing images to and from a memory card, expressed as megabytes per second. However, video doesn't need as big a data pipe because the video format is a smaller "fixed stream" that uses only a portion of the data pipe. Unlike card write speeds that measure maximum performance, class ratings measure the minimum sustained speed required for recording an even rate of video onto the card. What does this difference mean for me? Still digital images shot on high-megapixel cameras should utilize fast data throughput (a large data pipe), higher speed cards for improved performance. Speed Class is a minimum speed based on a worst case scenario test. The current SDHC specification defines Class 2, 4, 6, 8 and 10 as follows:

Hard disk drive A disassembled and labeled 1997 HDD laying atop a mirror. Overview of how an HDD functions The two most common form factors for modern HDDs are 3.5-inch in desktop computers and 2.5-inch in laptops. As of 2012[update], the primary competing technology for secondary storage is flash memory in the form of solid-state drives (SSDs). History[edit] Video of modern HDD operation (cover removed) HDDs were introduced in 1956 as data storage for an IBM real-time transaction processing computer[3] and were developed for use with general purpose mainframe and minicomputers. In 1961 IBM introduced the model 1311 disk drive, which was about the size of a washing machine and stored two million characters on a removable disk pack. Some high performance HDDs were manufactured with one head per track, e.g., IBM 2305 so that no time was lost physically moving the heads to a track.[8] Known as Fixed-Head or Head-Per-Track disk drives they were very expensive and are no longer in production.[9]

untitled iBooks Author iBooks Author (iBA) is an e-book authoring application by Apple Inc. Documents created with iBooks Author may be exported as PDF files or be published to the Apple iBooks Bookstore. iBooks Author is available free of charge. Apple released iBooks Author on January 19, 2012 at an education-focused special event in New York City.[2] Simultaneously, Apple also released iBooks 2 and a new iBooks Bookstore category for textbooks.[3] The software is proprietary and available only for Mac OS X. Apple offers it for free download in the Mac App Store. Apple describes iBooks Author as a tool for "educators and smaller publishers to create their own books".[2] Documents created by iBooks Author may only be sold for a fee if they are accepted by and distributed by Apple,[4][5] but authors also have the option to distribute their work anywhere if the work is being distributed for free.[6] A new version of iBooks Author was released on October 23, 2012. References[edit] External links[edit]

Het gebruik van administratieve mailbox - FAQ - Service Desk Naast persoonlijke e-mailadressen zijn er heel wat administratieve e-mailadressen in gebruik bijvoorbeeld voor congressen of secretariaten. Enkele voorbeelden:,,,, ... Deze administratieve postvakken hebben een ue-nummer en worden beheerd door één of meerdere personen. Het openen van een administratieve mailbox gebeurt via of via outlook Rechten verlenen aan de beheerder(s) van het postvak Diegenen die het administratief postvak moeten beheren, vragen rechten hiervoor aan de manager. in Outlook: zoek het administratief postvak (bv. Deze persoon kan via de webinterface de volgende rechten toekennen: full access en zenden als (deze laatste is incl. write personal information). Meer informatie over het toevoegen van Full-Access rechten vind je in het document gwbeheer Full-Access.pdf

Home » The M-DISC™ AirStash review Take a wireless router, make it run on battery, add an SD card slot and shrink the whole thing down. Congratulations, you just made an AirStash. Read on for the review. The AirStash is a device that aims to fix the issue that iOS devices have with lack of expandable memory. By creating its own Wifi network to allow any Wifi enabled device to access its content it essentially adds a wireless memory card reader to those devices. This way you can stream data as well as write data to a memory card, all without a physical connection between the memory card and the device.Obvisouly this is aimed at iOS devices first and foremost since those lack memory card slots, but it can also be used with other devices that either have no full sized memory card slot or need more memory that one slot can provide. Before going further into how it works, let me address the elephant in the room. Design The AirStash basically looks like a large USB SD card reader. How it works Writing files to the AirStash

Portable Document Format Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems.[1] Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. In 1991, Adobe Systems co-founder John Warnock outlined a system called "Camelot"[2] that evolved into PDF. While Adobe Systems made the PDF specification available free of charge in 1993, PDF was a proprietary format, controlled by Adobe, until it was officially released as an open standard on July 1, 2008, and published by the International Organization for Standardization as ISO 32000-1:2008,[3][4] at which time control of the specification passed to an ISO Committee of volunteer industry experts. History[edit] In 2008 Adobe Systems' PDF Reference 1.7 became ISO 32000:1:2008. Adobe specifications[edit] The specifications for PDF are backward inclusive. PDF 1.7[edit]

Reset settings for Brother HL-4040CN for more toner life » Computer Help I have a brother HL-4040CN colour laser printer, and it just started saying that ALL 3 colour toner cartridges had run out (and would refuse to print) Now, I know I print more yellow than any other colour, so telling me that all 3 need to be replaced it just a lie! I find out that the cartridges that I use are compatible with the following numbers: TN-115, TN-135, TN-155, TN-175 I had a look at the cartridges, and on the side, is a small circular “window” of clear plastic, where I assume the printer shines a light, to see if it gets to the other side (and then guess how much longer the cartridge will last before it actually runs out. Obviously their guess is wrong (and I suspect its deliberately wrong… for financial reasons… it means Brother gets to sell more toner). This is particularly annoying, when I see the clear window is half way between the top and the bottom of the cartridge. So after a bit of searching, I find a way to trick the printer into using all the toner: 4 Comments »

DjVu DjVu has been promoted as an alternative to PDF, promising smaller files than PDF for most scanned documents.[4] The main difference between DjVu and PDF is that DjVu is a pure raster file format while a PDF file can contain both vector and raster graphics. The DjVu developers report that color magazine pages compress to 40–70 kB, black and white technical papers compress to 15–40 kB, and ancient manuscripts compress to around 100 kB; a satisfactory JPEG image typically requires 500 kB.[5] Like PDF, DjVu can contain an OCR text layer, making it easy to perform copy and paste and text search operations. Free browser plug-ins and desktop viewers from different developers are available from the website. History[edit] The Djvu technology was originally developed[5] by Yann LeCun, Léon Bottou, Patrick Haffner, and Paul G. The DjVu library distributed as part of the open source package DjVuLibre has become the reference implementation for the DjVu format. Compression[edit]

EPUB EPUB (short for electronic publication; sometimes styled ePub) is a free and open e-book standard by the International Digital Publishing Forum (IDPF). Files have the extension .epub. EPUB is designed for reflowable content, meaning that an EPUB reader can optimize text for a particular display device. EPUB also supports fixed-layout content. History[edit] EPUB became an official standard of the IDPF in September 2007, superseding the older Open eBook standard.[3] In August 2009, the IDPF announced that they would begin work on maintenance tasks of the EPUB standard.[4] Two broad objectives were defined by this working group: "One set of activities governs maintenance of the current EPUB Standards (i.e. On April 6, 2010, it was announced that a working group would form to revise the EPUB specification.[6] In the working group's charter draft, 14 main problems with EPUB were identified, which the group was to address. Features[edit] File format[edit] Version 3.0.1 (current version)[edit] <? <?