Sharing Pedagogy with Java
As this project has developed, the applets have evolved, in part due to user comments and suggestions. The HTML page for each applet has a mailto: tag to allow the user to send e-mail directly to me. Also, I have learned new Java tricks and thought of improvements. So, the code-change dates are provided on the index page. Future improvements will include homework-type problems with each applet.
After several months of hosting the applets, it became clear that some academic programs were being hampered by long download times in using the applets over the Internet. I now provide an archive file created with tar containing all the source code and HTML pages, so that the Java programs can be run locally at other universities. This tar file contains a Makefile, which provides a convenient way for the system administrator to compile all the source code at once. After installation, the local user points a web browser at the directory containing the applets and then proceeds in the same way as the user on the Internet, but faster. If you want to try this or see the source code, the anonymous FTP site is www.coastal.udel.edu and the file javapp.tar.Z is in the /pub/programs directory.
I could improve access speed for the Internet user in a couple of ways. For each applet, I could compress all the class files for a particular applet into a single zip file, reducing the number of times the downloading browser has to connect with my machine. (For Internet Explorer users, the files would need to be in CAB format.) Another option would be to move to the Java bean model. The problem with this solution is that the language is evolving rapidly, so the applets would also have to evolve.
I view the pedagogical advantages of applets such as these to be paramount and potentially leading to large changes in the way education material is delivered (until the next more convenient tool comes along). Another major implication deals with free delivery of course content. What is the motivation for people to provide these programs and what is the benefit to their institutions, particularly if there is a reduced need for textbooks?
Several scenarios may play out in the future. Free course content may soon dominate the Internet. This would follow the model of the Linux operating system and other free software packages. What do the developers get? Recognition. What do the institutions get? The same as they now get with textbooks—recognition. Alternatively, the advent of methods to bill small amounts of money safely over the Internet might permit such sites to charge for each use. This will most likely happen for sites that deliver an entire course on-line.
Java offers a new and flexible way to provide active educational content to augment classroom instruction, both for the local institution and institutions everywhere. Through the Internet or local downloads of applets or applications, the examples developed by one instructor can be shared by all.
Robert A. Dalrymple (firstname.lastname@example.org) directs the Center for Applied Coastal Research (http://www.coastal.udel.edu/) at the University of Delaware. He has written LJ articles on Scilab, Xfig, Xfm and EXT2tools. He has been using Linux at home and work since 1.0 came out. This spring he built ORCA, a parallel computer consisting of 8 Pentium II machines linked with a high-speed Ethernet switched network.
Practical Task Scheduling Deployment
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
Free to Linux Journal readers.View Now!
|The Firebird Project's Firebird Relational Database||Jul 29, 2016|
|Stunnel Security for Oracle||Jul 28, 2016|
|SUSE LLC's SUSE Manager||Jul 21, 2016|
|My +1 Sword of Productivity||Jul 20, 2016|
|Non-Linux FOSS: Caffeine!||Jul 19, 2016|
|Murat Yener and Onur Dundar's Expert Android Studio (Wrox)||Jul 18, 2016|
- Stunnel Security for Oracle
- The Firebird Project's Firebird Relational Database
- Murat Yener and Onur Dundar's Expert Android Studio (Wrox)
- SUSE LLC's SUSE Manager
- Managing Linux Using Puppet
- My +1 Sword of Productivity
- Non-Linux FOSS: Caffeine!
- Google's SwiftShader Released
- Doing for User Space What We Did for Kernel Space
- SuperTuxKart 0.9.2 Released
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide