In Search Of... A Few Good Developers
Occasionally I get a chance to poke my head up and see what is new and different and occasionally I get asked if I know anyone that could help. This is one of those cases.
I got a nice email from Mike Lebo, N6IEF, this afternoon, asking if I knew of any Open Source developers, interested in tackling a project that he has in mind, and he sent me along the guts of it.
If you want to jump right into what he has in mind, he has posted it to GoogleDocs. For the rest, let me paraphrase. Mike is out to modify and write software needed to convert the analog voice of a ham radio operator into narrow band digital modulation and convert the received digital modulation into a selectable synthetic voice.
Now, I am sure you are asking: Why do this?
The bandwidth of voice is about 2,400 Hz. When speech is reduced to 125 Hz, the gain is 12.8 dB (19.2 times). Processing gain by a computer is cost free. This project receives weak signals 9 dB below the SSB (Single Side Band) noise floor of a radio.
OK, this is pretty geeky stuff! (If you thought Amateur Radio was just a bunch of old white guys warming their hands over tubes, think again!) Mike added, in his email: I want to do phone moon bounce and it is very hard with ssb. Now that is really geeky. (Yes, there is a whole subculture of operators that live to bounce signals off the moon to each other.)
So, if you are looking for a summer project and hacking the kernel just seems so ... yesterday, here is a perfect project for you to flex your muscles on.
Now, if you will excuse me, I have to crawl back into KVM.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
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.
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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