AIM Chat with Russell -Blyth .
9:51 AM
Good morning, all
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vnc is up
yup
but not qt
right
stand by
is it ok if I sit by?
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hello
What about QT?
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soon
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I was just playing with the Maple Calculator (having gotten paid today  and it's got some really nice features. I'll use "trace/tangent" in cal1.
9:55 AM
video up
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good morning
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vnc and video are up
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the video archives from yesterday afternoon are up now
QT just opened; g'mornin'
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10:00 AM
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peachy, how are you?
Ok
louder please...
all systems ok
that's good. thx.
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i didn't know Maple has command completion; that's great
can you change the current directory within maple?
ok
10:05 AM
great
assistant?!?
QT audio is spotty
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That's how the Car Guys do it!
Peggy, you may try restarting QT
I actually got to take a course in car repair from them, years before they went on the radio. Yes, they are that funny!
how could they not be?
lip syncing?

wow. pretty candlestick holder!
looks like a lathe project
that too. (Must be friday: we're chattier today)
The saved file still needs to be run IN Maple, right?
no, it's two women facing each other...
lol
Perhaps "teehee" is the right response 
I see you're getting to be an AIM expert, Peggy. Fancy smileys and everything!
10:10 AM
actually i want to turn that off - i prefer the actual : ) to the yellow face...
I don't see MakePackage on the syllabus - will it be posted?
I think they're posting the added stuff on the transcript page, not the syllabus page
will put this on the transcript page at the break
(it literally was completed 15 mins before the session)
very good
Gotcha!
I'm giving mike an A for that HW.

shades of python lists
and c/c++ array references
this is great - thanks
this is really helpful, thanks!
10:15 AM
"nops"?? No ops?
yes
that's what my programming colleagues calls the hopeless students...
# ops
ah
operands
my life has more nops than I care to have
One problem I have is with the set as opposed to the list. Also you can repeat a procedure and the answer may be {x=1,y=3} and then {y=3,x=1} the next time. Any helpful comments?
that's just too weird. did they mean for that to happen?
so, you can't force the output to be a list or array?
nice
10:20 AM
thanks. i needed that.
Can we run these with you, or just watch?
ok
I'm still trying to master how to best set up the text/math
me too.
right
ditto
I find that I LIKE when the code is in red. It makes the reader aware of it and encourages them to think about what the commands mean as they get results.
10:25 AM
I agree. When I write worksheets, I'm always struggling to decide whether to use the "pretty-print" of 2D math...or whether ot use the 1-D, which my studetns are much more likely to notice and execute.
I always use 1d
2D is sooo much easier to read.
even though it means students have to learn a slightly harder syntax, it's worth it because they acknowledge that it is code and treat it with respect
If we are trying to teach coding, that may be. I want them to use Maple as a tool.
Right. You need to be careful, though...if the only difference between text and executable code is the italics, students will not think to execute it.
I just meant that it teaches them to be careful about exactly what they are typing
I use 1D because 2D is real pain to type
I also personally prefer 1d so that probably biases me
They don't pick up as much from context as you might expect. (Even "execute this" doesn't seem to register that it's a good time to hit enter)
10:30 AM
it does take a while on this example
absolutely
The text Numerical Analysis by Burden and Faires has an excellent algorithm for minimization. The contour plots are very illuminating.
The within function is nice.
Note: I found that # comments out ALL CODE from there to the end of the block, not to the end of the line. ugh.
10:35 AM
Hmmm. I'll try again, but it really did go to end of block. (Windows; 11).
really messed me up when writing code... suddenly stuff quit executing...
I had real problems with Maple 11 in document mode, not recognizing ends of lines, and thinking line ended at a place it didnt. I finally switched to notebook mode, and did everything there.
ah ha: document mode is where i was. thanks
I don't have "notebook" mode. Did you mean "worksheet"?
That's it
thx.
10:40 AM
I like that comment "for some unknown reason". I found myself doing things like that too often. gotta be some basic structure of variables/expressions/functions I'm missing.
10:45 AM
Go Cards!
lol
More transoarent would make it even easier to visualize
if you add the transparency command into "display" you only need one
We're getting there
I mean that we have transparency in later copies of this graph
One of my students observed once that at the Metro Center subway station in DC you can SEE an actual intersection of two cylinders.
Change one of the colors to yellow
You can't see yellow on an overhead projector
Or green. It's sort of a bummer
green works ok on mine, but yellow is pretty hopeless
But Maple is not an overhead projector.
We don't have computer classrooms
10:50 AM
We show Maple on computer projectors during class, and are forever having trouble with viewing in class
I have a cable from my computer to a television and a dongle to make it possible to just project what is on my computer onto the tv.
yep, us too
Oh! That would be nice.
"dongle"? Is that a techincal term? : )
I often use Maple with a projector, and yellow seems to work for me. Green looks the same as blue on ours.
Ask for it. It is probably a very low-cost option.
is the tv really that much better than a projector?
yes.
dongle is a technical term
I think we can connect to the TVs if need be. Check with ITS
(seriously.. it is.)

No, but our classes come with tv's and the school (I am in public high school in a large county system) has only a few projectors for lots of staff to share.
I understand
i love it
Our kids have laptops, but I hate to make them bring them to class everyday
why?
I don't know of any way to use the overhead projector with a computer at all.
So I do a ton of projecting maple
too heavy

I use the maple calculator virtually every day
they need toughening up then
they sure do
ah, but mac's builtin calculator is SO nice! 3D graphs, etc. (Or it used to be...)

the pleasure of working for a very expensive private school--students expect coddling
and get it
where i am some rooms have digital projectors so you can show your laptop screen
sounds like more of the pain to me

Dell has a nice projector (About 1K??) for displaying the computer screen onto a pull down screen.
That looks really nice
we have projectors in the ceiling in every room - easy to connect, etc.
(the current plot, I mean)
Nice graphics
yes
yes, that's a really cool picture
almost art!
we do too, but I heard the set up cost $20K per room
good place to put grandkids at the end of the day
lol
My kids would love it
whoa. i don't think we paid that much. will ask.
10:55 AM
A cart, laptop, and projector is inexpensive.
even more fun
ooo eee! that was really pretty
Where will these Maple files be located for download?
Is there some way to force the 2sqrt(2) to stay sqrt(
on the transcripts page
That's right!
http://euler.slu.edu/GrantWebPages/PREP07Calc3Maple/transcripts.html
This problem was what my kids did on the last day of class.... only a few got to the three cylinders : )
three cylinders are really hard
Is there an inert form of sqrt? Like Sqrt?
Thanks!
GREAT! I've wanted that ' magic.
That's was a typical example of what happens to me all the time in 2D math when I try to use it. The s qrt I mean
yep
That's good idea
11:00 AM
Wow! Someone's been studying!
surd?
surd is a way to make Maple not barf with sqrt
it's more tolerant of possible negatives
even if the...thing under the root...won't be negative
Hmm shouldn't it be ab-surd?
The ab-surdity keeps coming. You know me, Rich
pretty picture, just not enough ice cream
Hmmm...how could we make more ice cream?
move the center?
a sphere atop

2 scoops
two spheres stacked...
Wow, I always get teh talkative classes

I think we find this volume 3 different ways...
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and yes, spherical is when they sigh with relieft
JQ: do you have vnc and video?
Yes
good
Tevian Dray has an activity like that in his Bridging the Vector Calculus Gap materials.
11:05 AM
I've never done it...but what if the sphere of ice cream has its center above the cone? Hmmm... more yummy anyhow...
yes, this can be done
ice cream hover craft
 I'll try that next year!
Very nice! Good written presentation
(no no: there's connection between the IC and the cone - just .... argh/ can't sketch here...)
yeah, I give that worksheet an A+
great worksheet
A+ seconded
Thanks
Thank you. I"m very intrigued by the ice cream hovercraft, myself
And a little hungry now
it is lunch time on the east coast, for sure
A++ only if you deliver the ice cream, otherwise A+
wouldn't A++ be B?
lol
11:10 AM
No, A++ would still be an A, but it would increment so the next time it would be B.
That's the beauty of an online course--on the internet no one knows you're a dog! So I could be eating, drinking, whatever.
I have to try several times before it will execcute the with(plots)
wow!
I am weak with 2d input as contrasted with the standard worksheets in Maple 9. Are these red commands in 2d input? The previous worksheet had 2d input as Maple commands in black
These are 1D
No, the red are 1-D
nasty thunderstorms
I don't think the with(Vectorcalculus) evaluated either
11:15 AM
yeah, I'm thinking I'll use all ";" for a long long time...
Should be counterclockwise
cool. that looks 3D
This plot initially was much larger, going almost across the whole width of the worksheet. I have no idea what I did to it that shrunk it.
You can grab one of the corners and enlarge it
and yellow?
Yellow id the original vector field
Nice!
got it
this plot is has some kind of 3d illusion effect. I thought the vectors were some kind of frame going around the ellipse
It's a nice visualization now that I understand it
Sorry, I switched the colors in the middle
The blue shopuld be red
and it's green's thm : )
11:20 AM
I brought in green-iced cupcakes that day...
That's just to scale the values to [0,1]
too kewl
Hue is 1/2 (blue) or 0 (red)
my kids do somehting like this to open a parachute smootly, in SVC euler lab 
my grandsons would enjoy that, especially with sprinkles and ice cream
Saturation changes from 0 to 1 as the function value goes further from 0. At the same time, value changes from 1 to 0.
this is great. i'll give you credit when i use it
11:25 AM
Those plots are so good
i agree. i googled a long time to find applets to do a lot of this... with less good results. this will pay for my copy of maple, for sure.
what does the "server:4" on the bottom line mean?
It tool about 250 sec on Jonathan's computer, and about 1800 seconds on my old piece of junk
ah - I didn't see the others: so many yours went to <>. got it.
that's 30 minutes
Peggy, I have applets at http://www.slu.edu/classes/maymk/MathApplets-SLU.html
How do we obtain info about purchasing a faculty copy at a reduced rate being in this workshop(not the adoption program)?
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Being in the program gets you a $99 copy. Go back to one of the original messages Mike sent.
11:30 AM
bye
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thanks
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thanks, bye!
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Thank you!
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I will spend more time on curvature... but am not likely to have anything better. Will send email 30 min before class to say for sure.
outstanding plot! Gotta go.
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kerley--The email with that info was from June 13
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11:35 AM
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