unsrsly

9 ms·

31.
by unsrsly 6y ago
A rough summary: narratives are a form of lossy compression that enable us to make sense of events so that we can plan actions and coordinate with others. In the past, influential and powerful individuals would compress events into a Narrat
32.
by unsrsly 6y ago
In the real world, all of the dimensions are discretized. The input dimensions are theta (gantry angle), n (detector channel), and z (table position). The output dimensions are x, y, z. For a fixed z, the plot of projection intensity as a f
33.
by unsrsly 6y ago
Random aside: once you've had a few physics or engineering classes on waves, filters, etc, it feels really impressive that the cochlea performs something similar to a wavelet transform on incoming sound waves: https://www.nc
34.
by unsrsly 6y ago
In fact, the 3D CT image itself is reconstructed from projections! See https://en.wikipedia.org/wiki/Tomographic_reconstruction
35.
by unsrsly 6y ago
This debate is sort of in the weeds. The models are not that important. We have plenty of real world evidence to be very concerned about Covid19. The following facts are not contradictory: 1. The code is bad, maybe even unreliable 2. Scient
36.
by unsrsly 6y ago
Interesting. My sense is that valuable patents end up in court almost 100% of the time (e.g. CRISPR).
37.
by unsrsly 6y ago
Hyperpolarized 13C MR?
38.
by unsrsly 6y ago
I'm not sure the HN community participates in the CABG PCI wars, but maybe your comment will lead to a fiery debate.
39.
by unsrsly 6y ago
MRSA is known to "hide" from the immune system on indwelling hardware. Often, part of the treatment for MRSA infection is to explant the hardware (source control). So even though MRSA infection is not a "device failure,"
40.
by unsrsly 6y ago
From firsthand experience, I can tell you the handheld versions make it more challenging to obtain a diagnostic quality image. Also, many of them are intended to be plugged into a personal device (like an iPhone) which I would not want to b
41.
by unsrsly 6y ago
LOL. I agree with you- healthcare should be way more accessible and affordable. But I suspect that if you looked at what it costs to train and deploy a field medic in today's military, you would find that it is a lot. And the many reas
42.
by unsrsly 6y ago
I will make the (likely unpopular) comment that point of care ultrasound (POCUS) doesn't have a large impact for Covid-19, because Covid-19 is primarily diagnosed via PCR of a nasopharyngeal swab, and pneumonia is primarily a clinical
43.
by unsrsly 6y ago
A few thoughts below as a medical student with some ML background. I'm quite interested in hearing what others think: 1. The majority of clinical ML applications are still focused on narrow (e.g. binary) image recognition tasks. This m
44.
by unsrsly 6y ago
Previously: https://news.ycombinator.com/item?id=22782980
45.
by unsrsly 7y ago
Sorry, I could have been clearer and said something like RNA fragments (non-infectious residue of the virus). It's true that in a clinical situation, you need to treat the positive PCR as infectious until proven otherwise. But from a r
46.
by unsrsly 7y ago
It is unclear whether these patients are shedding viral RNA particles from their prior infection or actual infectious virus from an ongoing infection. The way to tell the difference would be to perform viral cultures instead of the PCR-base
47.
by unsrsly 7y ago
Thanks for adding that. Interestingly, Eric Feigl-Ding is a bit like Nicholas Christakis in that he is not an expert in infectious diseases, however he has positioned himself as an expert on COVID19. This seems to have annoyed some of the r
48.
by unsrsly 7y ago
The R is a function of human behavior, so sheltering in place lowers it (ideally below 1) which also reduces deaths in the future.
49.
by unsrsly 7y ago
For example, Guérin, C., Reignier, J., Richard, J.C., Beuret, P., Gacouin, A., Boulain, T., Mercier, E., Badet, M., Mercat, A., Baudin, O. and Clavel, M., 2013. Prone positioning in severe acute respiratory distress syndrome. New England Jo
50.
by unsrsly 7y ago
Great question! You are referring to ECMO. The main limitations of ECMO come from the serious complications that can occur, which can include life-threatening bleeding, blood clots, infections, strokes, and brain damage. The number of hospi
51.
by unsrsly 7y ago
Pleural effusion = fluid around, but not inside of, the lungs. It is treated using thoracentesis. Suction = for removing secretions inside of the larger airways. Consolidation = fluid inside of the lungs, specifically within the alveoli. It
52.
by unsrsly 7y ago
Sedation should always be preferred to restraints, but for various reasons it is not possible to sedate someone 100% of the time in the ICU. The use of restraints described in the article is disturbing, but more context would be needed to u
53.
by unsrsly 7y ago
This is an interesting question! Note that human stem cells and cancer cells do not have a limit on how many times they can divide. This is because they possess the enzyme telomerase. Also, note that in human reproduction, there is an unbro
54.
by unsrsly 7y ago
Lisinopril and losartan are usually stopped in patients admitted to the hospital for an infection.
55.
by unsrsly 7y ago
Lisinopril is a competitive inhibitor of ACE that prevents it from converting Angiotensin I to Angiotensin II
56.
by unsrsly 7y ago
The Sievert unit is based upon the Gray unit of radiation dose, but it also includes a weighting factor for the type of biological tissue that is exposed to radiation. You can also read up on the linear no-threshold model of radiation expos
57.
by unsrsly 7y ago
Fun fact: Faraday cages don't block low frequency magnetic fields. But mu metal and active magnetic shielding can :)
58.
by unsrsly 7y ago
I am loving the troll-y nihilism! <i>Knowledge</i> and experience are the basis for prioritizing information, efficiently handling a patient's complaint(s) without doing a week of reading, and accessing reference sourc
59.
by unsrsly 7y ago
Love it. Ok- then do some reading and answer my question!
60.
by unsrsly 7y ago
Medical student here. It sounds like you can do the job of a doctor, but I can't be sure yet. Case vignettes are the medical equivalent of the coding interview. Let's start with an easy question. If someone comes to you with a fev

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