• 0 Posts
  • 45 Comments
Joined 1 year ago
cake
Cake day: September 14th, 2023

help-circle




  • 4 times in the last 5 years.

    There’s a combination of flaws. The strainer basket doesn’t do a very good job keeping debris out of the impeller. There’s little separation between the steainer and the impeller. So long hairs that are partially caught in the strainer can still wrap around the impeller.

    The pump itself has a terrible impeller design. The impeller is nylon and is press fit onto a 1/8 brass rod that just has a flat ground on it, no knurling or splines. The nylon cracks easily and ends up free spinning.

    They use the same pump in loads of washer models. So yes, there’s a very large user base, but that’s a lot of people with part failures. The pump is garbage and lg should not be using it.







  • I could be wrong, but I think XRD requires very pure crystals of sufficiently large size. That can help you ascertain the structure and composition of something you can synthesize and crystalize, but I don’t believe xrd can image specific regions of interest like single doping sites like this article talks about.

    Synchrotron XRD also has a major drawback in having a very significant equipment requirement that requires being able send samples away for analysis at a dedicated facility. That puts limits on sample preparation and stability time, as well as sharing beam time with lots of other groups.

    It’s been a while since I’ve read up on synchrotron xray diffraction though, so there could be workarounds for some of those limitation or I could be misremembering details.


  • These images are generated from processing many out of focus images while scanning across the area. They use the differences between the out of focus images to compute what must have caused those differences.

    So this technique is pretty far from being able to capture real time events as it requires capturing hundreds of images to produce a single computed image. The paper talks about how thermal motion of the nuclei is what now dominates the limits of resolution for this method.

    There are other ultrafast imaging techniques that can capture essentially real-time chemical reactions, but I believe those don’t come close to this spatial resolution.