Stephen A. Boyd, Ph.D.
@StephenABoydPh1
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Chemist; ²³³U fan; be the best father I can; Per. Table explained! prescient Chaplin quote ⬆; 0 science w/o 📐; RT≠ endorse; he/him; Opinions mine alone
Metro NYC/Terrapin Station
Joined March 2020
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In anticipation of @Apple's most hyped event today. #WWDC23 Here are 15 of my favorite Steve Jobs quotes 👇 1. The people who are crazy enough to think they can change the world are the ones who do. 2. Innovation distinguishes between a leader and a follower. 3. You can't connect the dots looking forward; you can only connect them looking backwards. 4. Quality is more important than quantity. One home run is much better than two doubles. 5. Design is not just what it looks like and feels like. Design is how it works. 6. It's really hard to design products by focus groups. A lot of times, people don't know what they want until you show it to them. 7. I’m as proud of many of the things we haven’t done as the things we have done. Innovation is saying no to a thousand things. 8. That’s been one of my mantras — focus and simplicity. Simple can be harder than complex; you have to work hard to get your thinking clean to make it simple. 9. If you don’t love something, you’re not going to go the extra mile, work the extra weekend, challenge the status quo as much. 10. Being the richest man in the cemetery doesn't matter to me. Going to bed at night saying we've done something wonderful, that's what matters to me. 11. Technology is nothing. What’s important is that you have a faith in people, that they’re basically good and smart, and if you give them tools, they’ll do wonderful things with them. 12. Remembering that you are going to die is the best way I know to avoid the trap of thinking you have something to lose. You are already naked. There is no reason not to follow your heart. 13. Don’t let the noise of others’ opinions drown out your own inner voice. 14. I want to put a ding in the universe. 15. Stay hungry. Stay foolish. (Quotes above are in no particular order) I hope you found these as inspiring as I did! Are you watching the event? Or if you’re seeing this after it ended, thoughts?
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@DickBuffett @annesheraton @lyssasphere Cheers - it’s all based on DFT: density functionAL theory. I emphasize “AL” because DFT (& the like 15 varieties of it) are based on the functionALs: the eigenvalue minima for a given system. You’re searching for the energetic ground state, b/z that’s where most molecules live.
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@DickBuffett @annesheraton @lyssasphere This outstanding paper was published in 2017. You can imagine the advancements that have been made in the last 7 years:
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@DickBuffett @annesheraton @lyssasphere Even the rank-2 tensor values in single-crystal samples are all easily calculable now.
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@DickBuffett @annesheraton @lyssasphere To use your own on/off-axis example, all possible angles (θ, Φ) are calculable. Even the Euler angles (θ_ij, Φ_i’j’) are calculable.
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@DickBuffett @annesheraton @lyssasphere Yes - massive changes since you have studied. All of the possible states are calculable, so the observer is irrelevant. Those are the eigenstates. Given an initial set of input conditions (pressure, temp, etc.), you calculate the density matrices.
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RT @tonyiommi: We're so pleased to have Tom Morello on board as the musical director for our #BackToTheBeginning show this summer. Tickets…
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@VHaoly @annesheraton @lyssasphere No, it doesn’t. Take the original example: water. We know everything about the degrees of freedom for a single water molecule in the solid, liquid and gaseous phases. S = k (lnΩ) and Boltzmann.
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@DickBuffett @annesheraton @lyssasphere Reread my post: no measurement is needed. Over the decades, we’ve accrued mountains of data: we can now simulate the eigenstates & predict the outcomes. SCALE, Q-Espresso, Gaussian - that’s just three of >20 software packages. We’ve even amassed a variety of basis sets.
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RT @newscientist: A tiny chip on the tip of a fibre-optic cable can perform AI computations as light passes through it, dramatically reduci…
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RT @historyrock_: Tom Jones and David Gilmour with a rousing rendition of Prince’s "Purple Rain" on Tom’s show in 1992. The Welsh twang o…
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@DickBuffett @annesheraton @lyssasphere The states are degenerate, but you don’t need to observe it. We know that the superpositions of quantum states all interact with one another: they’re the eigenvalues for each subsystem, so we can solve for them, including temperature effects.
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RT @QuantaMagazine: David Hilbert envisioned a “complete” mathematics, a firm foundation from which all mathematical truths could be derive…
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@annesheraton @lyssasphere Quantum states are inherent properties, so no interaction is required: the two protons are dipoles, so I = |1/2>; the oxygen is >99.7+% ¹⁶O, but the scarce ¹⁷O isotope (0.038%) S= -|5/2>; You have E_rot, E_vib and E_rot•vib (Raman). You’ll also get hyperfine interactions.
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RT @PhysInHistory: February 10, 1923 – Remembering Wilhelm Röntgen ✍️ The pioneer of X-rays, Wilhelm Röntgen revolutionized medical scienc…
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