Welcome to Digital Preservation Fall 2016

This is the course blog for LBSC 784 Digital Preservation at the University of Maryland.You can find the syllabus for the course online here. If you look around, you will also see that it is the same course blog I have used for my other digital preservation, curation and history courses. 

If you are taking the course, here are a few things you should do in advance of our first class on September 1st. 

  1. Read the syllabus. 
  2. Pick the three weeks that you want to blog about the readings and act as a discussant for and put in your name on that week on the syllabus. 
  3. Do the readings for the first week of class. 
  4. Register for an account on the blog, then email me (trevor dot johnowens at gmail dot com) your username so that I can give you permission to post to the blog. 

Tutu App | Download for iOS or Android

Tutu app, lately that has been very preferred for downloading and install cost-free apps and games particularly modded variation of Pokemon Go. It is a chinese appstore that provides fractured applications as well as ready free. This app store is now incredibly popular and also receiving substantial amount of visitors from all over the world although it remains in chinese language. The basic reality that it has actually ended up being popular is it was the initial platform that released the fully modded pokemon go video game version with strolling hack, gps hack, fake place hack and more. \.

Besides tutu application also has a lot of other modded, cracked and hacked apps and also video games too that are not conveniently available anywhere else. Worst thing is, this appstore has users from all around the globe, yet the language it is in is just chinese which will trouble you a little locating the applications however you will get made use of to it as soon as you began using this app. TutuApp Features
Some amazing and stunning features of tutu app are,

Most importantly and most valuable, it is free on both iOS and Android.
In iOS it can be downloaded on jailbroken and unjailbroken devices.
In Android it can be installed on rooted and unrooted devices.
Optimized for both tablets, phones and desktops.
User interface is efficient and pretty decent to use.
It also has built-in, memory optimizer and cache cleaner which are handy.
Download and Install Tutu App for Android – TutuApp Apk
To download tutuapp for android follow these steps below.
First of all unlock your phone and connect to any internet connection.
Open any web browser on your device.
Type the URL: “tutuapp.com” search.
Tutuapp’s official website will open and below will appear an option to download the app for your android device. This app is also called Rabbit Aide. So, you could also search it for by using the name bunny assistant. This application has a monogram of a tiny cute Rabbit as the name suggests. So men lets start tutuapp download.

Tutu Application– Android and also iphone.

Tutuapp Android as well as tutuapp iphone is offered for both the iOS and also android operating systems. And also I am here today since I will certainly show you how you can download tutuapp for both iphone as well as Android. Separate steps by step tutorials will certainly are given both for iphone as well as Android.

So, men to download tutu app on your phone simply follow the treatment below. In addition the application is available to download without jailbreak on iphone and also without origin on Android. twitter If chinese language is an issue then you can use TutuApp Vip version which is in English.
Tutuapps main website will open and below will appear an option to download the app for your android device.

Digital Projects in Special Collections Presentation

I hope you all enjoyed Susan McElrath’s presentation on Digital Projects in Special Collections at American University. I thought her presentation did a great job at addressing how the work we have been looking at and engaging in fits into the institutional objectives of the University.

She has generously offered to share her slides with us. I thought the best way forward would be to share them here with everyone.

Digitization, Digital Preservation, and File Formats

So I successfully scared everyone off from blogging about the The NINCH Guide to Good Practice in the Digital Representation and Management of Cultural Heritage Materials. If you get a bit lost in this reading I suggest reading over mwest24’s post on it from last year.

Along with the post I would suggest the following vocabulary terms that we should all become familiar with. I will weave these terms together into a bit of a how computer files and storage work discussion that will help set us up for Kirschenbaum’s book.

As this is technical info, I am just going to crib most of it for Wikipedia. Don’t get too lost in the details, but please read these over and click the links out to Wikipedia if you have no idea about some of the terms.

Key Terms for File Characteristics 

Dots per inch (DPI) is a measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm). The DPI value tends to correlate with image resolution, but is related only indirectly.

character encoding system consists of a code that pairs each character from a given repertoire with something else—such as a bit pattern. In our work, the most useful things to know about are ASCII and Unicode.

Data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation. Compression can be either lossy or lossless. Lossless compression reduces bits by identifying and eliminating statistical redundancy. No information is lost in lossless compression. Lossy compression reduces bits by identifying marginally important information and removing it.

Embedded Metadata: Metadata that is embeded inside a given file instead of existing outside the file in some other database or something. Examples include ID3 tags for MP3 audio files and Exif for image files.

Storage Terms

binary file is a computer file which may contain any type of data, encoded in binary form for computer storage and processing purposes; for example, computer document files containing formatted text

bit (a contraction of binary digit) is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states. These may be the two stable states of a flip-flop, two positions of an electrical switch, two distinct voltage or current levels allowed by a circuit, two distinct levels of light intensity, two directions of magnetization orpolarization, the orientation of reversible double stranded DNA, etc.

The byte (play /ˈbt/) is a unit of digital information in computing and telecommunications that most commonly consists of eight bits. Historically, a byte was the number of bits used to encode a single character of text in a computer[1][2] and for this reason it is the basic addressable element in many computer architectures.

disk image is a single file or storage device containing the complete contents and structure representing a data storage medium or device, such as a hard drivetape drive,floppy diskoptical disc, or USB flash drive. A disk image is usually created by creating a complete sector-by-sector copy of the source medium and thereby perfectly replicating the structure and contents of a storage device.

File Types:

Documents: Of particular importance for us are .txt .doc .pdf .xml and .html

Images: Of particular importance for us are .jpg .tiff  and JP2000

Audio: Of particular importance for us are .mp3 .wav

Digital Video Encoding: this one is tricky, we will talk about .mov .mpg .swf .mp4 and .avi

http://www.digitalpreservation.gov/formats/fdd/descriptions.shtml