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User: sfalc

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  1. Refractive surgery is not elegant on Laser Eye Surgery, Revisited 10 Years Later · · Score: 1

    Since I'm a PhD-student in ophthalmology and my subject touches this I'd like to add my two ören...

    Fundamentally all refractive surgery creates two optical systems where there previously was one. I.e a small central area in the cornea with the new refraction and a periphery with the original refractive error. So in darkness the vision will be worse. This is not an elegant solution. Further, the incision to create the corneal flap permanently severs the (some) nerves going to the flap. This might lead to problems such as dry eyes etc. Annoyingly the cornea heals badly. Thus, the corneal flap is much weaker than the rest of the cornea, so in case of trauma it can break.

    It is problematic that the standard measurement of visual function is (best corrected) visual acuity. Visual acuity measures only a small subset of our visual function. A more correct measurement is contrast vision and the contrast sensitivity function (CSF) of the eye. The CSF is analogous to the optical transfer function of the eye, but it also incorporates the neuronal contrast transfer at the retina.
    The CSF can be, slightly incorrectly, described as the information transfer ability of the eye and visual system. The problem with refractive surgery is that while you might increase the visual acuity it often comes at the expense of decreased contrast vision. But since contrast vision is seldom tested....

    Generally ophthalmologists aren't keen on having refractive surgery, at least those at the university hospital where I work.

  2. We have had it for quite some time in Sweden on BBC Crowdsources 3G Coverage Map · · Score: 3, Informative

    The internet registrar that manges the Swedish top lever domain, .se, has done a similar thing for a couple of years now. Crowd sourced using an app for iPhone/iPad as well as Android.
    They have a cool map where you can see mobile coverage and connection speed in Sweden. Intrestingly enough it also covers a large part of Europe, probably swedes on holiday.
    http://www.bredbandskollen.se/mobile.php

  3. IBM OmniFind - a simple easy solution on How To Manage Hundreds of Thousands of Documents? · · Score: 1

    IBM OmniFind should do the trick, It indexes your files and then you can search the index very quickly. It also does caching of documents and other nifty stuff. It is based on Apache Lucene and there is a free (as in beer) version, IBM OmniFind Yahoo Edition. The free version will work with up to 500 000 documents. I used it for searching a number of networked drives with circa 50 000 files on them which it did very well.

  4. Oddities in the Swedish law on It's Hard To Run a Blog In Sweden · · Score: 3, Informative

    It's all because of foolish requirements in the fifth and sixth section of the "Lag om ansvar för elektroniska anslagstavlor " , approximately translated, The Electronic bulletin board responsibility act.

    Which states that the provider is responsible for the comments if they obviously contains either illegal content (hate speech, child pornography, calls for riots) or
      illegally republished copyrighted content (i.e a very blatant copyright violation).

    And even if you didn't have the time to check all the comments or if you missed something, you are responsible, since you have been negligent ( sixth section).

    However even if he had been covered by the Freedom of the Press part of the Swedish constitution he would have been under investigation anyway, since hate speech is exempt.

    He will probably receive a small fine and that's the end of it.