Recent content by Solkar

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    A Spectral Classification Syntax for Binaries

    Yep, So more precisely, I think the only option for me is to an accessible version of the doc ... And indeed! There indeed is one: [RA91] Rao, S. S. & Abhyankar, K. MK morphological study of Am stars at 66 Å/mm. Journal of Astrophysics and Astronomy, Springer, 1991, 12, 133-178...
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    A Spectral Classification Syntax for Binaries

    Yes, of course. It's generally used both for separating alternative subclasses and luminosities - "alternative" here as opposed to "between" (that would be "-"). Here however it's unclear, especially because the "A" and" "F" classification are given en suite without such any seperator. But...
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    A Spectral Classification Syntax for Binaries

    for α Cnc one gets from http://simbad.u-strasbg.fr/simbad/sim-id?Ident=alpha+cancri a spectral type of kA7VmF0/2III/IVSr I don't get behind this special use of "/" - Syntax - what's that that meant to denote? kA7Vm+F02III xor kA7Vm+F02IVSr? Anything else?
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    Bring Back PF Chess - Have Fun & Interact with Members

    There is nice feat on chess.com called "vote chess": Two groups play a game and the teams, consisting of members of the respective groups, discuss and vote on the moves to be made. That's good fun.
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    Find the median of two sorted arrays

    Put it this way - the interviewer was in a position to play silly games with you: adding constraints on the prob and solution AFTER the candidate already started working on the solution is eristic for the lesser gifted. If that guy had been your team leader, be glad you won by getting out of...
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    Homework - time dilation problem (Lorenz factor is unknown)

    Sorry, it should by a minus, \Delta t'= \gamma\left(\Delta t - \Delta x \frac{u}{c^2}\right) not a plus in the Δt' expression; I had missed your typo in my first answer. Now do yourself a favor, set c:=1, and continue \Delta t'= \gamma\left( \Delta x/u - \Delta x\, u\right) = \gamma\left(...
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    Homework - time dilation problem (Lorenz factor is unknown)

    Right. And the Lorentz-γ solemnly depends on your "u", and you've given data for Δt', Δx, and Δt = Δx/u to be matched. So simply substitute and solve for u.
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    Calculating Projectile Height: 30 Degrees vs. 60 Degrees

    Don't put in sample numbers at an early stage; look at the big picture first and find proportionalities. Let "_v" denote vertical, "_h" denote horizontal components, "∝" means "is proportional to" Decompose momentum p =: p_v + p_h, consider Energies V ~ mgh => V ∝ h T = p²/2m and think...
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    Python How Can I Vectorize a Computation in a Python Device Simulation Algorithm?

    You're sure there's no constraint related to its eigenspaces?
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    Finding the Shortest Distance between Skew Lines

    It's not right ahead the minimal distance d between the lines g_1, g_2 you find by selecting those arbitrary points p_1, p_2 on each, you do this for getting representations of the parallel planes to be constructed: A plane P can be described in many ways, one of them is - a normal n - and a...
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    Python How Can I Vectorize a Computation in a Python Device Simulation Algorithm?

    Trivially by partioning α's range for each ij, but I would rather try to exploit this G_{i\alpha} G^{*}_{j\alpha} = \left(G_{j\alpha} G^{*}_{i\alpha}\right)^{*} or/and(given Σ is real, what I suspect) premultiplying all (G_{i})_{\alpha} vectors component-wise by a vector made of the Σ diag...
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    Are People Born with Talent or Is It Developed?

    As I said, that's my layman's pov only. It's only "based" on my personal reading of some Freud writings, some very good (physics) mentor's advice regarding learning efficiency and subsequent observation and self-observation and attempts to recap what I learned at which age and why. And on...
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    What is the Best Saxophone Song?

    The Vulcan Science Directorate has determined that, although there may still be uncertainty which of their songs is "the best", it would not even be self-consistent to assume that the very best song could be from anyone else than Led Zeppelin. :biggrin:
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    Fortran Integrating User-Defined Functions in Fortran 95: Troubleshooting Runtime Errors

    Because that's the normal distribution, but even just handling polynomials would imply having to deal with unary "-", binary "+", "*", "x^i" operator associativity and precedence rules.
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    Are People Born with Talent or Is It Developed?

    I tend to consider the human brain before and shortly after birth simply as an widely untrained neural network, not significantly predisposed to anything. Incoming neural stimuli train the brain one way or the other; and that's, up to my private, totally unsupported, laymanly theory, the...
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