Recent content by jhae2.718
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Finding intelligent life like us elsewhere as a main goal
I'd settle for finding intelligent life on our own planet first.- jhae2.718
- Post #25
- Forum: General Discussion
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Blackboards vs. Whiteboards: A Scientist's Perspective
Whiteboards, then blackboards. Smartboards? Absolutely not.- jhae2.718
- Post #18
- Forum: Computing and Technology
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Your favorite mathematical theorems
I am particularly fond of the Cayley transformation,\begin{align*}C&=(1-Q)(1+Q)^{-1} = (1+Q)^{-1}(1-Q)\\Q&=(1-C)(1+C)^{-1} = (1+C)^{-1}(1-C)\end{align*}where C is an orthogonal matrix and Q is a skew-symmetric matrix. Why? The right hand side commutes. The forward transformation is the...- jhae2.718
- Post #2
- Forum: General Math
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What's Coming in Physics Forums 4.0?
May I suggest HTTP 418?- jhae2.718
- Post #15
- Forum: Feedback and Announcements
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Should I choose Aeronautical or Astronautical engineering?
Most programs these days are aerospace engineering, which cover both atmospheric and space flight.- jhae2.718
- Post #2
- Forum: STEM Academic Advising
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Identifying Unknown Aircraft Model Found by Family Member
Looks like X-47B.- jhae2.718
- Post #9
- Forum: Computing and Technology
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C++ Tutorial Books: Easy to Complex | Advice
This is what our CS department uses for C++ [0]. It's also since been updated to use C++11 and C++14. As a general reference, having a copy of Stroustrup's The C++ Programming Language can't hurt. [0] My claim to fame for this thread is that Stroustrup's office is 3 floors above mine...- jhae2.718
- Post #10
- Forum: Science and Math Textbooks
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Graduate Geometric Product: Definition and Calculation
No problem, it gave me a reason to dig out my copy of New Foundations for Classical Mechanics and play with that. :D- jhae2.718
- Post #5
- Forum: Differential Geometry
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Bode Plot Matlab Homework: High Pass Filter
I'm late to the party, but the problem is you've defined the transfer function incorrectly. N=[1]; D=[1 w]; will produce\frac{1}{s+\omega_0};to get the desired TF of\frac{s}{s+\omega_0}you need to do N=[1 0]; D=[1 w]; The vectors defining the numerator and denominator of the TF...- jhae2.718
- Post #4
- Forum: Engineering and Comp Sci Homework Help
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Graduate Geometric Product: Definition and Calculation
\newcommand{\a}{\boldsymbol a}\newcommand{\b}{\boldsymbol b} From the original post I'm going to assume the question is answered, so here are the steps to the final solution for anyone interested (noting that I've only done a bit of work with geometric algebra after seeing a talk by David...- jhae2.718
- Post #3
- Forum: Differential Geometry
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Book recommendation for classical mechanics
Goldstein is good, are are the books by Greenwald. The books by Kane are worth reading as well; Kane's approach to dynamics, while somewhat procedural/methodical, is still useful for arbitrary systems and multibody systems. For a specific look at nonholonomic systems the classic text is by...- jhae2.718
- Post #14
- Forum: Science and Math Textbooks
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Are SSDs susceptible to data corruption from power loss?
I've had good results with Intel and Samsung drives. I've been running an Intel 520 series (or something like that) in my big ThinkPad and a Samsung Evo 840 in my tablet ThinkPad.- jhae2.718
- Post #20
- Forum: Computing and Technology
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Online password requirements have gotten ridiculous
Honestly, passwords are horrible and shouldn't be used. Not sure what the best alternative is though...good luck getting people to use PKI properly.- jhae2.718
- Post #37
- Forum: Computing and Technology
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Windows SW for advanced data analysis
I generally use MATLAB or Python (using the Anaconda distribution on Windows).- jhae2.718
- Post #2
- Forum: General Engineering