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Main Junction: [Sticky] ASK WHITECHAPEL -- the You Can Haz Help Now thread (Closes 25th Nov)

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  1.  (10882.1)
    #BLOGS

    I'm at the stage in my art career where it's necessary to maintain a professional blog. A few people have recommended Wordpress, and I may go that route, but I'd like to have a few more options to choose from. Does anyone know of a decent blog service with easy site-building tools, that won't cost me both legs and a pint of blood?
    •  
      CommentAuthoroldhat
    • CommentTimeFeb 4th 2013
     (10882.2)
    #BLOGS

    Tumblr might be better for you.
    •  
      CommentAuthorglukkake
    • CommentTimeFeb 4th 2013
     (10882.3)
    #BLOGS

    I have a bunch of friends who also use squarespace as a wordpress alt - it also is required to host your site, so it's kind of all in one with a drag and drop interface to change the layout.
  4.  (10882.4)
    #blogs
    I'd have to say Tumblr is the easiest way to go. I tried to customise a WP blog once and it made me cry blood
    •  
      CommentAuthordorkmuffin
    • CommentTimeFeb 4th 2013 edited
     (10882.5)
    #BLAGS
    @Greasemonkey, I've seen a large number of artists use Tumblr with great success, plus it means people can reblog your images more easily.
  6.  (10882.6)
    #BLOGS

    Thank you all, I shall investigate both Tumblr and Squarespace.
  7.  (10882.7)
    #Crystal Spheres

    Calling all physicists/opticians/fortune-tellers of Whitechapel!

    For reasons too tedious to explain I'm trying to figure out the focal point of a solid diamond sphere (refractive index of 2.419). I've found two conflicting formulas online - both of which place the focal point inside the sphere.

    Is this plausible? Or am I screwing up the maths? (not unlikely really...)
  8.  (10882.8)
    #crystal spheres

    As the surface of the sphere is convex the focal point will be inside the sphere, the same way that your eye focuses the light entering it to your retina.

    Sp i guess your sums are correct

    are you using this formula to work out the angles (the numbers are supposed to be subscripts)

    n1sin?1= n2sin?2, where ?1 and ?2 are the angles of incidence of a ray crossing the interface between two media with refractive indices n1 and n2
    •  
      CommentAuthorcurb
    • CommentTimeFeb 8th 2013
     (10882.9)
    #weirdTweets

    Some of the accounts I follow on Twitter are in the habit of starting tweets with a '.' immediately before @ mentioning someone and responding to their question. So I see an answer to a question but, as I'm not following the person they're tweeting, not the question itself. They're corporate accounts, so am I right in thinking it's some kinda marketing voodoo to make me want to find out more? Or is this some kinda bug?
    • CommentAuthorArgos
    • CommentTimeFeb 8th 2013
     (10882.10)
    #weirdtweets

    Probably a marketing voodoo. I use periods before @ when I start a tweet mentioning someone, but isn't directed at them. For example ".@soandso thinks suchandsuch but I disagree. Twitter are they right?!" It's definitely an intentional thing people do so the tweet goes out to all their followers and not just the person being @'d.
    •  
      CommentAuthorcurb
    • CommentTimeFeb 8th 2013
     (10882.11)
    Ah I see, that makes sense. Thanks! Sounds like you're doing it right, as opposed to all of the ".@soandso 'yes'." tweets that plague my timeline. I should just unfollow these people, but then how would I hear about their delicious new beers?
  12.  (10882.12)
    #crystal spheres

    "As the surface of the sphere is convex the focal point will be inside the sphere, the same way that your eye focuses the light entering it to your retina."

    The eye focuses on the retina because of the double-convex shape of the lens, not because of the spherical shape of the eye.

    (I don't know enough about the math of optics to answer the original question. It seems possible though.)
    • CommentAuthorArgos
    • CommentTimeFeb 8th 2013
     (10882.13)
    #twitter

    well, there is the lists function, but I find it to be somewhat useless since I always forget it exists and never check my lists, heh.
  14.  (10882.14)
    #Crystal Spheres

    Plausible, yes. There's a reason lenses and mirrors are parabolic and not spherical (which is that spheres have weird focal points that are a pain in everybody's ass).

    [edit]Here's a page with some equations for spherical lenses. Running the math, it looks like the refraction index of the diamond will always result in an effective focal length that is less than the radius of the sphere, so: inside the sphere.
  15.  (10882.15)
    @Jason
    Duh! not thinking straight evidently
  16.  (10882.16)
    #fossils and fair use

    I'm looking to try an art project that involves using photos of fossils to make linocuts, but I don't live in easy distance of any museum that has a decent number of them on display for me to make my own shots. Now, there's a big hairy pile of photos online which would be ideal, but I'm fairly sure that wouldn't be Fair Use, and CC asks that I credit the original artist if I modify, which would look a bit clunky written on a print. I'm projecting the images, so I can't really say they're just reference either. Other than getting in touch with the owners and offering them a print-sized bribe to salve my credit-removing conscience, is there a work-around I'm not seeing or public-domain source I can't find?
  17.  (10882.17)
    #Crystal Spheres

    @DavidLeJeune - Running the math, it looks like the refraction index of the diamond will always result in an effective focal length that is less than the radius of the sphere

    Damnit! That's exactly the result I was getting. Looks like I'm going to have to completely redesign my death ray... ;)

    Thanks everyone!
  18.  (10882.18)
    #fossils and fair use

    Wikimedia Commons is a big repository of public domain images. It can be a bit tricky to navigate, but you should be able to find some suitable ones.
  19.  (10882.19)
    #fossils and fair use

    Wikimedia Commons is not public domain (at least not most of it). The typical license (CC-BY-SA) is pretty permissive, however, so it should be close enough.
  20.  (10882.20)
    #fossils and fair use

    Oh derp, my mistake.

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