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I am extremely excited to announce that my latest article, a tutorial entitled Learn Geometry with Dr. Geo, will be published by opensource.com. This is the first article of this nature that I’ve written that someone else will publish. I think that they did a wonderful job presenting the article and using my screenshots. Thanks to opensource.com for publishing this article.
It will be available here on August 22, 2016 (that’s 22 August 2016 for the 6.68 billion people not living in the United States).
It’s been over a month since I published my last article, so I just wanted to check in with my readers. I have every intention of continuing this blog indefinitely, or as long as possible. My hiatus has been due to a recent lack of time. I have enrolled in courses to become an educational consultant, which has tapped into my time for this project. This project is one of the reasons that I am (eventually) leaving the field of teaching for that of being a consultant. This new career will provide me with the increased income that I need to develop this project adequately and to give it the chance to thrive that it so deserves.
In short, though my blogs will be less frequent until my courses are done, this blog, like my enthusiasm for the Energize Education project, will carry on. Thanks for reading.
I’d like to look at a nifty little media converter entitled WinFF. WinFF bills itself as an open source video converter. I refer to it as a media converter as it is capable of converting audio files as well. Truth be told, WinFF is actually a graphical front-end program for FFmpeg, which is a program run from the comand line that does the actual converting. WinFF simply allows users unfamiliar with the command line to run conversions using a graphic interface.
Before I begin, I want to say that I am running WinFF in Ubuntu Linux. Although WinFF is available for both Linux/UNIX and Microsoft Windows, the screenshots in this article will show WinFF being run on Linux and will also show a file manager, equivalent to Windows Explorer, displaying the contents of a CD, or as Linux refers to them, an Audio Disc, which is similar to a CD’s/DVD’s folder in Windows. That having been stated and without further adieu, let’s get to the point of this blog: converting media files using WinFF.
When initially launched, you will be presented with a window that should look like the screenshot at left. WinFF’s interface is WYSIWYG and you can see from the screenshot that the buttons on the toolbar (referred to as the Buttons in the WinFF documentation, which can be downloaded from their Web site) offer tooltips to provide more information about their function. Above the Buttons is a menu bar. Below these is an empty field where information is displayed during the conversion process. Below this are tabs pertaining to various types of media and a place to specify your output, or destination, folder.
I will be converting the CD shown in the screenshot at right. It was a gift from my niece (Love you, Ayla) and I’m anxious to add it to my MP3 collection. Place the audio CD in your DVD drive. A window will open asking you what to do with the disc that has been placed in the drive. Choose to open it in file manager. This way you can view the files on the CD. WinFF and FFmpeg support WAV files, but not CDA (Compact Disc Audio) files. Your CD is likely to have files in either format. Once you’ve checked the contents of the CD or, as WinFF refers to this type of media, Audio Disc, you can start WinFF.
Once WinFF has opened, click the Add button. This will open the Select Video Files window (shown at left), which looks like a file manager. Select the files that you wish to convert (Tip: You can press the CTRL and A keyboard keys simultaneously to select all pf the files) and click the Open button. This window will close and return you to the main WinFF window.
Now, set your desired conversion format and preset. For this type of action, Convert to should be set to Audio and the Preset to MP3. Next, choose your destination folder. This is important as it will make finding your converted files easier if you place them in a precise location. Clicking on the ellipsis (…) will allow you to select a more specific location than the default, which in Linux/UNIX is your home directory. When you are ready, click on the Convert button and the process will begin. The actual conversion process occurs in a terminal window as shown in the screenshot at right.
When the process is completed, you will be instructed to Press Enter to Continue (as shown in the screenshot above), which will close the terminal window and return you to the main WinFF window. The process is complete and you can now close WinFF. You may still want to rename your new MP3 files as they will still possess the generic name (e.g. “Track 1.mp3”) that they had while on the CD, but that can be done in a file manager at your leisure.
Ballard, F. (n.d.). FFmeg [software]. Lesser GNU General Public License.
Weatherford, M. (2013). WinFF 1.5 English Documentation.. GNU General Public License.
Weatherford, M. and Stoffberg, I. (2015). WinFF [software]. WinFF.org.
Energize Education through Open Source will be one of the books presented by Lulu Publishing at the Los Angeles Times’ annual Festival of Books at the USC campus on April 18 and 19, 2015. More information will be provided as it becomes available. For more information about the festival, click here.
This is a topic of great importance to anyone who has tried or wishes to try to introduce people to open source. For many computer users the mention of “open source” brings to mind Linux, what they perceive to be a computer geek’s operating system that is just too complex for regular people to use. Writer and technology coach Scott Nesbitt presents in this short video a viable way for people in the know to introduce open source to new users. He makes some damned good points, so you may want to take notes.
For this installment, I’d like to take a look at a piece of open source software (what else?) that allows you to view and modify hard drive partitions. If you have no idea what I’m talking about, please allow me to elucidate.
Modern hard drives offer an enormous amount of storage space. Imagine a massive warehouse in which you can store things. However, what if you need to section off space for certain things, such as office equipment? You might put in a room to house these things so that you can access them more readily. That’s where hard drives are like warehouses. You don’t always need one big space to store your data. You may want to section off, or partition, space on your hard drive for backup or maybe for personal files. If you use a recent version Microsoft Windows, your hard drive is already partitioned (one partition for your use and one partition for system restore files).
So, how do you partition a hard drive? This is usually done using a program called fdisk prior to installing an operating system. The reason for this being that adding or removing hard drive partitions can erase data on the hard drive in question. The only alternative is to use software designed to allow this process to occur while simultaneously protecting your data. This is where GParted comes into play.
Let’s take a look at the GNOME Partition Editor, or GParted, for short. When you start GParted, the program window will open and immediately start looking for hard drives and hard drive-like devices connected to your computer. Once such devices have been identified, GParted is ready to use. The screenshot on the left shows GParted displaying the partition table for the author’s primary hard drive (/dev/sda).
As you can see, GParted provides information regarding partition type, size and usage. In the case of the author’s hard drive, information regarding unallocated space is also included. Right-clicking on a partition will open a menu providing options such as unmounting the partition in question, resizing/moving the partition and even more information about said partition. Unavailable options are grayed out. Here you can also toggle the partitions from which your computer will try to boot, using boot flags. A toolbar provides moderate functionality, however, the menu bar near the top of the window provides the quickest access to features.
To demonstrate how easily partitions can be created, the author chose to create a partition on a 1 TB external hard drive. Simply right-click on unallocated space on your device and choose New from the menu. This will open the Create New Partition dialog box (as shown in the screenshot at right). Here you can enter such information as the size of the new partition, the file system (operating system type) and even a label for the new partition. When ready, click the Add button and GParted will do all the work.
When the process is completed, you’ll be presented with the main GParted window, which will display your newly created partition (see the screenshot to the left). Looking at the top pane in the screenshot, you can see that my new partition occupies the entire hard drive. Below this, a pane provides specific information. You will notice that the aptly named “New Partition #1” has a fat32 (usually spelled FAT32) file system. I have given it the label “My Passport,” which is the name assigned to this device by the manufacturer. You’ll also notice that its size is 931.48 GB. Used space and unused space are blank and this partition has not been flagged as bootable.
So, what types of partitions does GParted support? The screenshot on the right shows a GParted window displaying compatible file systems. Not all file systems are supported. However there are a few worth noting. The file systems ext2, ext3 and ext4 are the most common Linux/UNIX file systems. You’ll also notice file systems fat16 and fat32, the latter of which I used for my partition on the external hard drive. These file systems were used in DOS and Microsoft Windows 95,98 and ME. Finally, you’ll see ntfs, which was/is used on Microsoft Windows NT, 2000, XP, Vista, 7 and 8.
This leads me to one of GParted’s strongest features -the capacity to possibly restore data from a hard drive. If you’re running GParted in Linux, gpart must be installed. If you’re using a live CD/DVD version of GParted, this shouldn’t be a problem. I used an older EIDE hard drive that had been damaged in a system-wide crash a few years ago. Click on the GParted option on the menu bar, hover over the Devices option and select the desired device from the list that unfurls. GParted will analyze the device and display its report as shown in the screen shot on the left. Clicking the View button next to each file systems found will open a file manager in read-only mode. Here you can peruse the recovered data and even relocate it to a safer place.
The best thing of all is that you don’t need to be using Linux to use GParted. The GParted Web site offers a download for an ISO file that can be burned onto CD/DVD, as mentioned above. Your computer can then boot from this disc into GParted. Once booted up, you can readily partition any hard drives you need to or engage in data recovery in the event of a crash. How cool is that?
GNOME Partition Editor (GParted)
Hakvoort, B., Gedak, C. et al. (2014). GNOME Partition Editor [software]. GNU General Public License.
I’m currently working on an article about a brilliant piece of open source software called Scratch. It’s created and maintained by MIT and designed to teach beginning computer programming to young people, but gives them the opportnity to create interactive stories and games. These can then be shared with others online. I’m really excited about this fun and versatile application. The screenshot below provides a preview of Scratch.
Today I want to focus on the KDE Education Project or KDE-Edu. As you may know, KDE (K Desktop Environment) is an open source graphical interface for UNIX-based operating systems like Linux. KDE-Edu is a project started by the people at KDE with the intention of developing educational open source software for all ages, both learners and teachers.
The software that they produce addresses language arts, mathematics, science and social studies as well as other areas of learning, such as computer programming and occupational therapy. Language arts appplications range from KHangman, a variation of the popular word game to KWordQuiz, a vovabulary builder, to Parley, a powerful vocabulary assessment tool. Mathematics applications range from KBruch, a tool for quizzing users about fractions and facotrizations to applications addressing more advanced topics, such as KAlgebra for graphing algebraic expressions and Kig, an interactive geometry tool.
In terms of science software, KDE Edu has some interesting offerings. These include, but are not limited to, an interactive periodic table of the elements, Kalzium, a virtual planetarium for your computer desktop, KStars and Step, an application that allows users to create virtual two-dinmensional physical science experiments. If you’re looking for social studies applications, check out Marble, a virtual globe that allows users to view Earth from various perspectives including geographical, historical and climate or KGeography, an application that quizzes users on their geographical knowledge including locations, capitol cities and flags.
Other applications include KTurtle, a program teaching beginning computer programming, KTouch, a typing/keyboarding tutor and KLettres, a tool for teaching younger students how to write their letters.
I cannot do KDE-Edu justice in this short space. There are more applications available than I have discuessed here. I urge you to check them out. They’re open source, free and will soon (as of this writing) be available for Microsoft Windows.