11 Matching Annotations
  1. Feb 2019
  2. Jan 2019
    1. If one object is part of another object, then we use a diamond at the start of the arrow (next to the containing object), and a normal arrow at the end.

      Another way of thinking of this is, if the original owner (source) object and the owned (target) object share the same life cycle -- that is, the owned exists only when the owner does -- we say that the owner aggregates owned object(s). They share a whole-part relationship.

      What I did like very much about the video, was when the instructor pointed out that there's a small fallacy: aggregation, in OOD, does not really imply that owned object(s) must be a list.

  3. Oct 2018
    1. A more active stance by librarians, journalists, educators, and others who convey truth-seeking habits is essential.

      In some sense these people can also be viewed as aggregators and curators of sorts. How can their work be aggregated and be used to compete with the poor algorithms of social media?

  4. Jun 2018
    1. there have always been far more users/consumers than suppliers, which means that in a world where transactions are costly owning the supplier relationship provides significantly more leverage.
    2. The value chain for any given consumer market is divided into three parts: suppliers, distributors, and consumers/users. The best way to make outsize profits in any of these markets is to either gain a horizontal monopoly in one of the three parts or to integrate two of the parts such that you have a competitive advantage in delivering a vertical solution. In the pre-Internet era the latter depended on controlling distribution.
  5. Nov 2017
    1. And that, in fact, is a pretty good description of the IMS standard in development called Caliper, which is why I am so interested in it. In my recent post about walled gardens from the series that Jonathan mentions in his own post, I tried to spell out how Caliper could enable either a better LMS, a better world without an LMS, or both simultaneously.
    2. Stephen Downes built gRSShopper ages ago
    3. Jim Groom's ds106 uses a WordPress-based aggregation system, the current generation of which was built by Alan Levine
    4. Jim Groom's ds106 uses a WordPress-based aggregation system
  6. Aug 2015
    1. Quality (DRG) 1.2675 0.61

      It seems there is no statistically significant differences in the Quality measured between the two aggregation levels.

    2. Hospital quality and, in some cases, its relationship with effi-ciency differs depending on aggregations.

      They are talking about diagnosis (procedures) //activity// aggregation.

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