Daily Archives: March 10, 2015

Parallel universes

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What do these parallel universes mean?

Let me begin with the term “parallel universes”. It is a term that seems to be exciting for a certain large group of the laymen (and filmmakers) although it creates almost no excitement among most professional physicists. The phrase has been given at least three vastly different meanings:

– different histories that could occur in quantum mechanics interpreted with the many-worlds interpretation

– different stringy vacua that may or may not be connected with ours by bubble nucleation within eternal inflation

– different branes that may be parallel to our, Standard Model brane in our world if it is a braneworld

Again, professionals would never confuse these three concepts but the laymen and filmmakers often do – because what they really understand about these concepts are just the two words, “parallel universes”. With this poor resolution of their wavelets, the very different concepts above may coincide.

— Lubos Motl

2015.03.10 Tuesday ACHK

Market price 2

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Joel Spolsky

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Livingston: If people have to pay more, they take the product more seriously?

Spolsky: Definitely. There was a five-user license that was like $199, and that just feels like shareware, practically. But today, when you say that a ten-user license is $999, it starts to feel like a more substantial product. In that market, it still is actually a good deal. But you really have to have a price point that conveys what you think the product positioning should be. Many people will judge where your product fits in the market based on its price.

— Joel Spolsky, Cofounder, Fog Creek Software

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2010.11.23 Tuesday ACHK