WTF? that was 10th grade? I know I started sooner than most on electronics when I took apart my dad's HP (first or second HP RPN engineering calc made, forget the model) when I was 3, but wow! I was winding motors and series / parallel circuit stuff in elementary school.
Since I'm in a similar situation to the OP I'll ask: Was 10th grade the right time for this kind of stuff or do you think you could have handled the series/parallel circuit stuff in late elementary with winding motors somewhere in the 6th-8th grade? I would think that by 7th or 8th grade you should be able to reliably build a crystal radio with a coil form based kit and a soldering iron.
I'm trying to develop a science curriculum that can be used in the K-8 grade school my daughter attends that can be run partially in-class and partially as an after school activity. The hard part is honestly not to get the kids attention, but rather to develop something that can be taught by someone other than an electronics/science/geology/etc. geek (that and getting permission for chemistry demonstrations in schools these days). -nB
FWIW I'm looking at having to fund and "interesting" science curriculum for my daughters class.
I already have a standing wave tube built out of polystyrene beads in a 6 foot long, 6 inch diameter plexi tube. This would also be an awesome demo for the school kids for the OP. I'm looking to build a tennis ball canon powered by dropping a bowling ball down a tube. yeah, OP should expect to have to fund much of this himself. -nB
you may have missed it but I mentioned that the active compound (alumina powder in this version of thermite) pulls oxygen from *it's* environment, not _the_ environment. In the case of thermite, alumina's environment is [mixed with] the ironIII oxide.
nope, that's the very reason I thought I was right. I didn't elaborate about it though.
Specifically in any oxidizing reaction the active compound pulls oxygen from its environment to burn. In a silo explosion that is from atmosphere, in thermite it is from ironIII oxide. -nB
that's because the GPL binds software development and not use. IMHO the software should notify the user that it is GPL, and give a "Joe Sixpack" summary of the GPL so users understand it applies to software devlopers. -nB
Which of course is wrong: The Long Now has a solution. they are ~$20K a pop I think.
Basically a solid relatively inert metal (nickel) is laser etched to hold the data then cast in a glass sphere to provide magnification.
The machine readable version I imagine would be a nickel disk etched with pits and lands then CVD'd with titanium nitride or other suitable HardShit(tm) to further protect it. If done right this disk could possibly be playable in a CD-Rom reader, which should be around in one form or another for a long time (I can still find grammaphones, wire recorders, 8 tracks, VHS machines, etc. because they were popular). -nB
nevermind, even if the polish is gone you can take a peice of paper and a crayon and recover the data fairly easily (in the case of words cut into stone). -nB
The crystals are melted by passing a current through a BJT transistor. The heat given off melts the calcoginide(sp?) material. Reducing the current quickly causes it to freeze in an amorphous state, cooling it slowly produces a crystal. The resistance of the two phases is different, thus having memory.
Pros: *Naturally rad hardened since it is a physical state, not a charge like flash and DRAM. *Easy to erase in manufacture (the reflow temp is high enough to erase the whole memory) *3D memory arrays are possible. The same material can be used (with metal) to make a transistor, thus you can make layers of arrays. Traditional flash is one layer deep as it requires doped Si for the transistor.
Cons: *In prototypes we've seen cell phones erase themselves when left in a closed up black car on a black dash with a black interior on a hot Phoenix AZ summer day. *you can't factory program the memory, it must be programmed after reflow onto the device. (flash can be ordered from the factory pre-programmed in large unit orders). *Manufacturing defects have been an issue (bubbles in the calcoginide material.
I used to work for a company developing this stuff. We had prototype units in modified production cell phones as long as two years ago (when I left). Not sure if some of the cons have been fixed since then. -nB
Company I used to work for did something called commission draw: you make a base pay of $10.00/hr if your commission exceeds that you're paid commission. If your commission falls short (working hours when the store is not open could cause this) you are paid your base pay, with a catch. The catch: you owe the difference between your commission and the base pay next time your commission exceeds base pay.
I'm from the future. Hate to break this to you but DNF has new ownership. And to hel with the temporal prime directive. This part of space is all fscked up anyway.
That's just it. I feel like a radical. I describe myself as a Libertarian / Constitutional Fundamentalist and in so doing people look at me like I'm crazy. I honestly think the government sees people like me as a bigger threat than anyone else. It is our simple lack of organization that keeps us from being in the crosshairs...
damn I do sound like a nut. still, the point stands, wanting to bring back the constitution makes you a radical these days. -nB
when they ask "what's this" to your printouts, just call it "one of those pictures you have to look crosseyed at to see in 3D. They'll stare at it for a bit, decide they can't see anything and move you along. -nB
I wouldn't call that bad. I have three managers (and a couple wannabies). My offical manager has no clue what I'm doing, leaving my other two bosses that handle the day to day stuff to tell him I'm on-task. I am responsible for prototyping test automation "stuff". I work largely alone on a given project till I hand it off. I keep a running joke that there is a specific company award I'm hunting for that apparently I'm not allowed to have. So far no issues, and it's been a few years under this manager, 10 at the company.
I value a hands off manager more than anything else. Give me a task, give me time+resources and let me work. I'll give you results.
My last project was so nebulously designed that had more than one person been working on it, it wouldn't have gotten off the ground for lack of "requirements documentation". The task was: Do X Must be interoperable with Y Needs to produce results Z1, would like results Z2 as well.
My prototype was so popular (reduced 2.5 man-weeks of testing down to 36 hours of machine automation) that the proto went straight to production, without the planned re-write. Thus I am glad I wrote it as if production to begin with, rather than chicken scratched something out.
I don't know about you, but I'm thinking of a batch job that needs to run over the weekend and be *done* by Monday AM. Reliably.
If the've taken a C/C++ app and decided that it should be a.NET C# app (it's still C language right;), and yes I've encountered that) then I could see this making the product no good.
I'd take the TV remotes and the hard disks. Leave everything else untouched...
Burglary to fsck with people sounds more fun than anything else... -nB
as a victim of a burglary recently I must note that I would kill me if I ever caught me doing said things. Also, that the first thing I thought when I saw the door busted was *please god not the server*.
What if you *genuinely* thought the person was joking.
As in I am asking you if you would like to help me overthrow the government tomorrow. you would (rightly) assume I am not going to do this. But I have asked you, seriously, would you like to help me overthrow the government? If I go off and do it tomorrow would anyone seriously believe you to be an accessory before the fact?
Maybe his friend assumed he was joking, maybe he assumed his friend wouldn't go through with it solo?
To be fair, there has to be reasonable judgment applied to any "before the fact" accusations. I have no idea which way this one should fall. -nB
in the case of polish you act on one nail at a time in the case of screws you drive one at a time in the case of teeth you brush many at a time. [/nit]
Wow... Can I go to jail in your country now? I assume entering the country illegally should do ok right? Do us Yanks need a passport to visit? I can burn mine if that'll help me go to jail (or do I need to pretend that the war of independence hasn't finished up yet?) -nB
Slashdot Mirror
I'm genuinely *not* dissing you here...
WTF? that was 10th grade? I know I started sooner than most on electronics when I took apart my dad's HP (first or second HP RPN engineering calc made, forget the model) when I was 3, but wow! I was winding motors and series / parallel circuit stuff in elementary school.
Since I'm in a similar situation to the OP I'll ask:
Was 10th grade the right time for this kind of stuff or do you think you could have handled the series/parallel circuit stuff in late elementary with winding motors somewhere in the 6th-8th grade? I would think that by 7th or 8th grade you should be able to reliably build a crystal radio with a coil form based kit and a soldering iron.
I'm trying to develop a science curriculum that can be used in the K-8 grade school my daughter attends that can be run partially in-class and partially as an after school activity. The hard part is honestly not to get the kids attention, but rather to develop something that can be taught by someone other than an electronics/science/geology/etc. geek (that and getting permission for chemistry demonstrations in schools these days).
-nB
FWIW I'm looking at having to fund and "interesting" science curriculum for my daughters class.
I already have a standing wave tube built out of polystyrene beads in a 6 foot long, 6 inch diameter plexi tube.
This would also be an awesome demo for the school kids for the OP.
I'm looking to build a tennis ball canon powered by dropping a bowling ball down a tube.
yeah, OP should expect to have to fund much of this himself.
-nB
you may have missed it but I mentioned that the active compound (alumina powder in this version of thermite) pulls oxygen from *it's* environment, not _the_ environment. In the case of thermite, alumina's environment is [mixed with] the ironIII oxide.
nope, that's the very reason I thought I was right. I didn't elaborate about it though.
Specifically in any oxidizing reaction the active compound pulls oxygen from its environment to burn. In a silo explosion that is from atmosphere, in thermite it is from ironIII oxide.
-nB
that's because the GPL binds software development and not use. IMHO the software should notify the user that it is GPL, and give a "Joe Sixpack" summary of the GPL so users understand it applies to software devlopers.
-nB
hopefully the latter will happen. Then FOSS will see an uptick.
-nB
this material is an Oxide. Thus it is already "burnt".
Which of course is wrong:
The Long Now has a solution.
they are ~$20K a pop I think.
Basically a solid relatively inert metal (nickel) is laser etched to hold the data then cast in a glass sphere to provide magnification.
The machine readable version I imagine would be a nickel disk etched with pits and lands then CVD'd with titanium nitride or other suitable HardShit(tm) to further protect it. If done right this disk could possibly be playable in a CD-Rom reader, which should be around in one form or another for a long time (I can still find grammaphones, wire recorders, 8 tracks, VHS machines, etc. because they were popular).
-nB
(economical) != (archival-grade)
nevermind, even if the polish is gone you can take a peice of paper and a crayon and recover the data fairly easily (in the case of words cut into stone).
-nB
without it's firmware it wouldn't boot, but yes, re-programming the phone brought it back to life.
I see the new temps Samsung has hit are high enough that this will not be a problem for them.
The crystals are melted by passing a current through a BJT transistor. The heat given off melts the calcoginide(sp?) material. Reducing the current quickly causes it to freeze in an amorphous state, cooling it slowly produces a crystal. The resistance of the two phases is different, thus having memory.
Pros:
*Naturally rad hardened since it is a physical state, not a charge like flash and DRAM.
*Easy to erase in manufacture (the reflow temp is high enough to erase the whole memory)
*3D memory arrays are possible. The same material can be used (with metal) to make a transistor, thus you can make layers of arrays. Traditional flash is one layer deep as it requires doped Si for the transistor.
Cons:
*In prototypes we've seen cell phones erase themselves when left in a closed up black car on a black dash with a black interior on a hot Phoenix AZ summer day.
*you can't factory program the memory, it must be programmed after reflow onto the device. (flash can be ordered from the factory pre-programmed in large unit orders).
*Manufacturing defects have been an issue (bubbles in the calcoginide material.
I used to work for a company developing this stuff. We had prototype units in modified production cell phones as long as two years ago (when I left). Not sure if some of the cons have been fixed since then.
-nB
You know, that might not be a bad marketing gimmick...
Company I used to work for did something called commission draw:
you make a base pay of $10.00/hr
if your commission exceeds that you're paid commission.
If your commission falls short (working hours when the store is not open could cause this) you are paid your base pay, with a catch.
The catch: you owe the difference between your commission and the base pay next time your commission exceeds base pay.
That was working in a vulture pit.
-nB
yeah this is gonna kill my existing mods...
I'm from the future.
Hate to break this to you but DNF has new ownership. And to hel with the temporal prime directive. This part of space is all fscked up anyway.
it all depends on what the definition of the word "is" is.
-nB
That's just it.
I feel like a radical. I describe myself as a Libertarian / Constitutional Fundamentalist and in so doing people look at me like I'm crazy. I honestly think the government sees people like me as a bigger threat than anyone else. It is our simple lack of organization that keeps us from being in the crosshairs...
damn I do sound like a nut.
still, the point stands, wanting to bring back the constitution makes you a radical these days.
-nB
when they ask "what's this" to your printouts, just call it "one of those pictures you have to look crosseyed at to see in 3D. They'll stare at it for a bit, decide they can't see anything and move you along.
-nB
I wouldn't call that bad.
I have three managers (and a couple wannabies). My offical manager has no clue what I'm doing, leaving my other two bosses that handle the day to day stuff to tell him I'm on-task. I am responsible for prototyping test automation "stuff". I work largely alone on a given project till I hand it off. I keep a running joke that there is a specific company award I'm hunting for that apparently I'm not allowed to have. So far no issues, and it's been a few years under this manager, 10 at the company.
I value a hands off manager more than anything else. Give me a task, give me time+resources and let me work. I'll give you results.
My last project was so nebulously designed that had more than one person been working on it, it wouldn't have gotten off the ground for lack of "requirements documentation". The task was:
Do X
Must be interoperable with Y
Needs to produce results Z1, would like results Z2 as well.
My prototype was so popular (reduced 2.5 man-weeks of testing down to 36 hours of machine automation) that the proto went straight to production, without the planned re-write. Thus I am glad I wrote it as if production to begin with, rather than chicken scratched something out.
-nB
I don't know about you, but I'm thinking of a batch job that needs to run over the weekend and be *done* by Monday AM. Reliably.
If the've taken a C/C++ app and decided that it should be a .NET C# app (it's still C language right;), and yes I've encountered that) then I could see this making the product no good.
hmmmmm ...
when all else fails, ad-hominum right?
you must be a pinko commie!
I'd take the TV remotes and the hard disks.
Leave everything else untouched...
Burglary to fsck with people sounds more fun than anything else...
-nB
as a victim of a burglary recently I must note that I would kill me if I ever caught me doing said things. Also, that the first thing I thought when I saw the door busted was *please god not the server*.
What if you *genuinely* thought the person was joking.
As in I am asking you if you would like to help me overthrow the government tomorrow.
you would (rightly) assume I am not going to do this.
But I have asked you, seriously, would you like to help me overthrow the government?
If I go off and do it tomorrow would anyone seriously believe you to be an accessory before the fact?
Maybe his friend assumed he was joking, maybe he assumed his friend wouldn't go through with it solo?
To be fair, there has to be reasonable judgment applied to any "before the fact" accusations. I have no idea which way this one should fall.
-nB
in the case of polish you act on one nail at a time
in the case of screws you drive one at a time
in the case of teeth you brush many at a time.
[/nit]
Wow...
Can I go to jail in your country now?
I assume entering the country illegally should do ok right?
Do us Yanks need a passport to visit? I can burn mine if that'll help me go to jail (or do I need to pretend that the war of independence hasn't finished up yet?)
-nB