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    1. Ask a cosmology PhD student (almost) anything!

      Hi all, I am a PhD student focusing in cosmology. I wanted to up the science content here on Tildes, and I thought that one way to do so is to have an informal little Q&A session. As such, feel...

      Hi all,

      I am a PhD student focusing in cosmology. I wanted to up the science content here on Tildes, and I thought that one way to do so is to have an informal little Q&A session. As such, feel free to use this post to ask any questions you might have about cosmology specifically, and physics in general.

      This may not be as exciting as some other science AMAs given that I am a rather early graduate student, so there may be a lot of questions I don't know the answer to. However, I'm willing to try my best and answer over the next few days, and to let you know I don't know if I don't!

      A bit about myself: I did my undergraduate degree at the University of Chicago where I studied physics and mathematics, and then I was a student researcher in a computational cosmology group at a national lab. I subsequently enrolled at UC Davis to continue studying cosmology. Ask me anything about physics, cosmology, or high performance computing!

      I also invite anyone else with expertise to chime in as well!

      23 votes
    2. Entry-level oscilloscope and function generator

      Hi physics tilderinos, I'm about to move into my own apartment and have my own space for the first time in a long time. I'm a software engineer by profession, but I'm an avid electronics hobbyist,...

      Hi physics tilderinos, I'm about to move into my own apartment and have my own space for the first time in a long time. I'm a software engineer by profession, but I'm an avid electronics hobbyist, and I'd love to get my own simple lab set up. I already have the essential handheld gear - soldering iron, multimeter, etc - but I don't have access to an oscilloscope or a decent function generator.

      I do know how to use a scope, though only analog, since my last one in high school was a Beckman Industrial Circuitmate 9020 20MHz analog scope from the 90s. I'm considering the Rigol DS1054Z, since it's recommended by a lot of hobbyists and the software options are all hackable (so you can buy the cheap version and get all the options free). I'd love to know of alternatives and any issues with this scope, or advice on how to find a better one (noting that $400 is really the absolute top of my price range).

      For a function generator, on the other hand, I have absolutely no idea what to buy. I was looking at a couple of DDS generator kits, but a $75 generator kit seems like it would be a biiiit sketch. Any help is appreciated.

      8 votes