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em99010pepe
11-28-2007, 04:12 AM
One of the reasons I've been away from Free-DC forum is due to my preparations to my master thesis. The subject will be about dust explosions and the goal there is to determine the minimum ignition energy of the dust, minimum ignition temperatures of the dust, etc.
Dust explosions are more violent than gas explosions....
I already have all tests apparatus in order to start the tests, just reading the ASTM and European standards. I'll also post some pictures of the test installation.
The master thesis will be written in Portuguese but I hope to have an English version to share with you all.

The other reason is that I am helping RPS on prime hunting. lol

Best Regards,

Carlos

Digital Parasite
11-28-2007, 12:36 PM
Cool, good luck with the thesis work. We would definitely be interested in seeing some pics.

It was a little over a year ago that I finished my Masters so I know what you are going through. Just make sure you don't blow yourself up!!!

Guilherme
11-28-2007, 12:43 PM
Good luck, Carlos. Looks like an interesting topic.

wirthi
11-28-2007, 05:03 PM
You'r not the only one working on your master thesis right now. My "working title" is Model-Based Generation of End-User Programming Environments. In other words: I will write an Eclipse-based IDE that adapts to the needs of users that are no experts in software engineering. The interface itself is not hardcoded but modelled so it can easily be adapted.

paleseptember
11-28-2007, 08:50 PM
PhD pure mathematics at the moment :D

Actions of semigroups on k-graphs. We consider a small category with a degree map satisfying a unique factorisation property, and consider actions represented as automorphisms on elements of the category. These pass canonically to C*-algebras, which means we can analyse these complicated structures by considering the generating graph.

And to those two of you who didn't fall asleep during that, I enjoy it and it's interesting, and that's what matters!

LAURENU2
11-28-2007, 11:09 PM
That was a mouth full for me. :bonk: I just wish I could understand that stuff.
But thats what I get for not reading anything but blueprints and codes for the past 40 years:bang:
Education sure has come a long way from my time :thumbs: and thats a good thing.


Dust explosions are more violent than gas explosions....


PS
If I remember right back in the 50's there was a grain dust explosion from a ship that was loading And it flattened like a mile around the blast.
A mini atomic bomb

em99010pepe
11-29-2007, 12:03 PM
Some pictures (http://celppinho.googlepages.com/dust). Don't look at the work area because it is a mess!!!!

Scoofy12
11-30-2007, 07:51 PM
Looks like fun. Have you published any papers? Theses are a lot easier to write if so. My MS thesis (entitled High-Performance Network Intrusion Detection through Parallelism) was basically 2 research papers slapped together with a little glue text. Easy! (of course it was a lot of work getting them in the first place).
Alas, I was too dumb to get out of grad school, and now I'm getting Piled Higher and Deeper (http://www.phdcomics.com/)

gopher_yarrowzoo
11-30-2007, 09:31 PM
Lauren2u - all I will say is this why you think there are No Smoking signs up all over the place at warehouses that store flour that is even more lethal than grain.
Easy expriment to show the effects
Take 1 empty tin which has a tight fitting lid.
Clean out and cut a small hole in the side, this is where you blow a small quantity of flour in, and affix something suitable that can withstand heat such as a solid metal syringe or similar, no needle required.
Put a tea candle in the base so the hole has to be high enough to pass over this.
Prepare a small dose of flour and add to the syringe.
Fit syringe to side, close lid..
Blast Flour in
BOOOM! it should basically explode and blow the lid off, sometimes it works sometimes it don't but it shows the effect.
Look on a pack of flour at the Energy values...
Now if it's like overhere it will say 1.2Kcal 5Kj or something like that it should say 1.2 calories as
1 calorie is defined as the energy required to raise 1 litre of water by 1 degree C i.e the specific heat capacity of water or 4180 J..
Now work the size of your average grain hopper in kilo's or lb's whatever measure it has on the side of the bag and multiply it by the figure on the side (multiply that up if required to get to nearest whole unit of Kilo's or lb's.)
:scared: or :shocked:

em99010pepe
12-01-2007, 04:29 AM
Looks like fun. Have you published any papers?

I have two but not related to dust explosions...
(Keywords: Heat transfer, Turbulence, Laminar flow, Flame characteristics, Numerical simulation.)