typodupeerror

## Comment Re:Sleep (Score 2, Informative)259259

Ah, the life of a night owl.

I know it sounds weird, but you might try keeping a sleep journal. It could help you collect data and maybe see what's going on. I just started using a program called SleepChart. Seems like it will take a long time to gather enough data, but maybe it will be helpful.

IANAD or anything, though. Just someone else who isn't a morning person.

## Comment Re:Eigenmath (Score 1)776776

It may look like it is calculating something impossible; however, I believe it is actually taking a shortcut. Its assuming that you want to take the dot product of two vectors.

You can confirm this by using letters instead of numbers.

X=(a,b)
X*X
a^2 + b^2

Y=(c,d)
dot(X,Y)
ac + bd

I believe MATLAB has similar "shortcuts" that you have to be careful of.

If you're worried, it does in fact check the matrix dimensions:

Z=((a,b),(c,d),(et,f))
dot(Z,Z)
Stop: inner: tensor dimension check

dot(transpose(Z),Z)
[ displays a large, correct matrix :) ]

## Comment Re:Slide rule all the way (Score 1)776776

I would actually like to learn how to use a slide rule. Do you know of any good places where I could purchase one? I would prefer a linear one, rather than a circular/pilot style slide rule. Thanks!

## Comment Octave (Score 1)776776

No problem! I do what I can :)

This has been posted several times in this thread, but I thought it was worth a link since you mentioned MATLAB...

GNU Octave claims to be a free replacement to MATLAB. Even says so in the FAQ: "Octave is a high-level interactive language, primarily intended for numerical computations that is mostly compatible with Matlab." Cheers!

## Comment Eigenmath (Score 1)776776

If anyone actually reads this far down, Eigenmath is an awesome open source graphing calculator that supports scripting. It has good symbolic support, calculus and matrix functions, and really good documentation (for an open source app).

Think of it as MATLAB-lite.

## Comment Re:Technical Paper (Score 1)241241

Wow, that is a fantastic find for us engineering-types. I was surprised to actually find some things that I recognized from my controls and multi-body kinematics classes. Thank you! I'm off to build my own mech now... :D

## Submission + - Giant Open Source Video Conferencing Robot

oogie writes: "My brother and I ( regular slashdot readers ) have started a company to make human height Video Conferencing robots. The telepresence robot, nicknamed the Giraffe, lets you "be in two places at once" by letting you project your presence ( see, hear, be seen, be heard, and move around ) across the internet. These robots run GNU/Linux ( Ubuntu ) and the software is open source! The robots will retail for between \$1800 and \$3000. The robots are useful for many things including telecommuting, remote team management, and robotics research. The robots feature a privacy switch so that if desired, incoming calls need to be 'answered.'"

## JournalJournal: U.S. cartoons drawn in North Korea77

In what can only be considered something only to be discussed in the dark, smoke-filled rooms of some far off country, several cartoons which were run in the U.S. had parts of them made in North Korea, including The Lion King.

## JournalJournal: Slashdot Cookbook: tofu

This next recipe is not vegetarian, but does use tofu: Red-Cooked Chicken, Vegetables and Tofu

## JournalJournal: Chinese Flashcards for Mobile Phones22

I recently wrote a Chinese flashcard program for mobile phones - mostly to help my own Chinese language skills, but I decided to put it online for free download from my website for anyone who wants to use it.

## JournalJournal: Looking for an old game???11

Hey, everyone or anyone I'm trying to track down an old, old computer game. I'm not sure if it was for apple or PC but I think it was PC. It's called Fairy Tales, but it's not like mother goose fairy tales. You started off as one of three brothers, when you died as one brother, you would become the one of the other brothers. T he only difference between brothers was the shirt and hair colors. It was like Ultima because you could do just about anything, steal, kill innocent people, it was the f

## JournalJournal: Battle of the Sexes: Shower Style33

Time-sharing is the junk-mail part of the computer business. -- H.R.J. Grosch (attributed)

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