Comandante

I am in urgent need of software that can be used to limit bandwidth to all computers on a local area network connected via a router. Preferably this software could be controlled from a single ('main') pc where I could set all necessary restrictions. I've been looking around but didn't find anything useful, if anyone has anything to suggest... feel free!

well, as it turns out, not many people play with chemicals around here... what a pity.

I have Netgear router with 2 types of firewalls' on it (or so it says, normal firewall and SPI (stateful packet inspection) for protection against DoS attacks), then I have Zone Alarm firewall on each pc on the network(have a very good reason for that), along with NOD32 antivirus system on each. I use Mozilla for web browsing (not the best but fine with me), and Mozilla Thunderbird as email client. I also occasionally scan with Ad-Aware, spybot S&D and a full system scan (every month) with NOD32 which takes about 7hrs due to my 270GB of HDD space. For wireless I use MAC filtering, WPA-PSK protection and hide my ssid in the broadcast. My passphrase is over 50 characters in length and key lifetime set to 60minutes (default). I also make sure I ocassionaly check my processes and msconfig for any abnormalities in the system startup programs. And last but not least, I always turn off my cable modem during the night (i.e. - when I go to sleep or am not home) and place my router's wireless antenna to horizontal position to decrease it's coverage domain. To evaluate, I have not had any problems with this setup, and it's been running for a while. There was 'something' - a virus or something of a kind, that tried to spread over the network at one stage but NOD32 caught it in flight and carbonized it on the spot (not to mention ZA's eager allow/disallow system which does the job well too). This just reminded me of another little program that I Must have - and I do - a piece of software called BC Wipe. It utilizes a patent to delete a file from a hdd for good (leaving no chance for it to be revived, also used by the military or so I hear) which I sometimes use to delete sensitive files and even some tough adware from safemode. My bad on using Win XP but hey, noone's perfect . So if you use XP you can use my setup, it will keep you safe.

Damn that sounds intense! I take it it's worse than SO2 gas? I'm asking 'cause a little bit of SO2 knocked me down hard

A question about health hazards; If I was to inhale chlorine gas of concentration like the one on woelen's photo, what is the worst thing that can happen to me? What is most likely to happen to me? Assume I inhaled about.. 20mL.

Interesting. I will try to find AC PS to perform your experiment woelen and if we have 2 sets of results that produced copper(II) then we could conclude that electrolysis does indeed work with AC but to a limited extent. Obviously it's not good for any practical use as there's all sorts of things happening in there (judging from your results), nevertheless it disproves the statement 'electrolysis with AC does not work' ... (We should have another go at it to make sure of that though, but I think your experiment meets my satisfaction, I always wondered if AC would work for electrolysis at all.) (by the way thanks for changing my title whoever did it ) I'll take a guess at saying that different electrodes would experience a similar effect and I doubt it would make any difference as far as AC is concerned... However, I don't wish to imply so until I try it

Following YT2095's logic the electrodes should remain in their original states after being exposed to AC in the solution for a certain time. That's what I thought as well. But in that experiment of yours you are saying that both electrodes did corrode and H2 gas was released. I have one question, if there was no copper chloride formed, does that mean that electrolysis did not work, despite the hydrogen gas and corroded electrodes?

i have a power supply that i use for electrolysis and it's only DC. what if i was to try an AC PS for electrolysis? what would happen? (couple of shots at google revealed that this would apparently not work) my guess would be - nothing much, not that i tried, but there should be something happening there no? i'd be thankful to anyone who can explain the effect in a bit of detail.. edit: title meant to be 'electrolysis with/by AC'

hey this downtime is still happening a lot and it's getting rather annoying, is anything being done to fix it?

Yes, I believe I had the misfortune to try some lame beer, not once but a few times, and so I don't like it. Anything you'd recommend? (Apart from the Belgian ones

heh, easy for you my friends... if you lived in australia you'd know how hard is it to obtain some of the stuff from your lists... can't even buy water without getting harassed .. hope they dont install geiger counters on the doors or something. at least i 'feel' safe

hey Frederik, interesting that with beers , are you saying belgian beers are as good as brunt circuit boards ... i dont like beer anyway lol YT2095 if you succeed with that isolation let us know (did you try TCP? aparently something commercially available in UK, never heard of it before http://en.wikipedia.org/wiki/TCP_%28antiseptic%29 ... edit: of course that won't work lol, how about that fungicide they mentioned trichlorophenol?)

just out of curiosity, what would you consider to be your top 10 favorite chemicals (single element's fine too)? here's my list 1. potassium nitrate 2. hydrogen peroxide 3. sulfuric acid 4. ammonium nitrate 5. iron oxide 6. hydrochloric acid 7. potassium sulfate 8. copper 9. aluminium 10. water

ah cool. thx. surely i wasnt intending to taste it or anything just asking. and no i won't get hold of it literally , if i find it tho it'll be a small glass bottle with some phenol in it

try browsing scienceforums.net in older threads in chem and physics, i'm sure you'll find stuff

lol what's the taste like? Asked to know what kind of precaution should I exercise if I happen to get a hold of it, didn't look like a harmless chemical at first sight, that's why

LOL, you mean the perfume caught fire? of course, majority of perfume is alcohol, burns well. you sprayed it on the stove gas that was burning as well? that'll burn yeah. i dont see how perfume bottle absorbed fire tho LOL sounds funny. did you have glass bottle, open cap, and then the fire followed into the bottle after you sprayed? wouldn't that be a bit dangerous, i never tried it

Beakers, flasks, stirring rods, lab bottles and the rest of glassware I get cheaper from ebay. The quality may not be the best but as long as it can withstand >500°C and has a decent accuracy for measurement it should be fine for that science level and even some more advanced stuff, so I'd def. recommend you try ebay (http://search.ebay.com/search/search.dll?sofocus=bs&sbrftog=1&catref=C6&from=R10&submitsearch=Search&satitle=&sacat=26231%26catref%3DC6&sargn=-1%26saslc%3D2&sadis=200&fpos=ZIP%2FPostal&ftrt=1&ftrv=1&saprclo=&saprchi=&fsop=2%26fsoo%3D2&coaction=compare&copagenum=1&coentrypage=search )

According to wiki benzene's health rating is 2 ("2. Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. (e.g., chloroform)") however for phenol the rating is 4 ("4. Very short exposure could cause death or major residual injury. (e.g., hydrogen cyanide)"). Is phenol really that dangerous? How feasible is it to work with it? Is it possible to inhale vapours and die or anything like that?

I don't think you've put your thread in the right section there, as far as I can see it doesn't fit in modern physics.

I see, sounds like a more efficient method. I'll actually give it a go sometime.

cooling fins on them? interesting. also, as a matter of fact, if u have cubes of ice in a bucket it's still a big surface area isn't it? i mean the cubes aren't laid down perfectly, the air can go all the way to the bottom of the bucket, through the gaps in the cubes, and to make it even better small holes can be made on the bottom of the bucket to let the water down into the next compartment. it's still a small bucket though, probably woudln't make much difference to the overall room temp, but i could add more ice again. and this is way impractical too if you ask me, but it's a valid way to cool the air without regular air conditioning system Ndi, thanks for the nice engineering info there

Actually I'll be happy to read about this if anyone has a nice technique.

why would surface area matter when its all going to melt down quick enough anyway, actually i've seen a device they call 'air conditioner' or something, it has a fan blowing behind a box in which ice can be put. that one works ok. but to cool the room as hot as mine right now... a bucket of ice will be nothing! i might consider a barrel

think i'll go and put a bucket of ice under my ceiling fan that will surely cool it down