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uj8efdkjfdshf

76 karma · joined June 26, 2019

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uj8efdkjfdshf··on Plastic-Eating Mushrooms (2021)
It's the difference between a plastic that eats mushrooms and a mushroom that eats plastic.
uj8efdkjfdshf··on I should have loved biology
Do cable bacteria[0] count?

[0] https://en.m.wikipedia.org/wiki/Cable_bacteria

uj8efdkjfdshf··on James Webb telescope reaches its final destination in space, million miles away
IMO grammatical gender in Indo European languages (of which the Germanic and Romance language families are a part of) reflect how nouns and their references (pronouns, adjectives etc) are semantically linked by modifying the word endings of the latter to better reflect those of the original noun - I like to think of it as the equivalent of type suffixes in assembly language.
uj8efdkjfdshf··on The Linux Experiments YouTube channel has been terminated
I mean, it's quite likely the ivermectin and hydroxychloroquine has some effect against the virus in the early stages of infection, but their use needs to be balanced against their side effects, of which there are many. It's like how bleach kills cancer cells, but you really shouldn't be treating cancer with it...
uj8efdkjfdshf··on Man can change his pupil size on command
You're not wrong - the cornea (front of the eye) has about 3x the refractive power of the lens. Both function as converging lenses, and the only difference is that the refractive power of the lens can be changed.
uj8efdkjfdshf··on Man can change his pupil size on command
It's the accommodation reflex [0] at work here - pupillary constriction goes hand in hand with a shortening of the focal length of the lens, and the eyes also converge together. This is a brainstem level response, so I doubt there'd be any easy way to dissociate these movements consciously.

[0] https://en.wikipedia.org/wiki/Accommodation_reflex

uj8efdkjfdshf··on Pressure-induced high-temperature superconductivity retained at ambient
It seems like they're describing a phenomenon where a material remains in a metastable configuration associated with a higher critical temperature, even after the pressure is removed and the sample warmed to room temperature.

That said, the Tc of this phase is still fairly low at about 30+ K, so this does not superconduct at room temperature, regardless of the pressure.

uj8efdkjfdshf··on Nominet Board voted out by members
Apparently it's to do with the board awarding themselves more pay and donating less to charity.

https://www.theregister.com/2021/03/18/nominet_board_support...

uj8efdkjfdshf··on Ask HN: Hackers locked my dad out of WhatsApp – need advice
I'm leaning towards no at the moment - mainly because the hackers appear to be based in a different country, and because they appear to be brute forcing the WhatsApp verification code API. Also, his phone could still do outgoing calls when he tried it earlier.

He said that he got a ton of SMS verification messages from WhatsApp and random phone calls from Argentina, Mexico and the US over the past few days that he was ignoring - not sure how they managed to bypass rate limiting on that.

uj8efdkjfdshf··on Space Tethers: Stringing Up the Solar System
There are mods that let you extend the physics range, but they don't address the underlying issue of the KSP physics engine bring numerically unstable over long distances
uj8efdkjfdshf··on Backblaze Hard Drive Stats Q2 2020
Cost and availability, especially at the higher capacities. Note that HGST was bought out by WD in 2012, and WD started sunsetting the HGST brand in 2018.
uj8efdkjfdshf··on I tried starting a manufacturing unit in India
Some questions:

- How much would you expect to spend if you were to pay all the bribes? Are you unable to afford them, or is this more of a moral issue?

- Is there any reason why you are effectively purchasing agricultural land and rezoning it to industrial land, rather than buying existing industrial land? What is your plan if you cannot obtain all the necessary NOCs?

- Is there any utility/road/rail access to your land? If not, have you looked into how much it will cost to build the necessary infrastructure?

- Is the area at risk for natural disasters (especially flooding)?

uj8efdkjfdshf··on Dorking: the use of search engines to find very specific data
You could always keep Google Chrome open to rerun these specific queries, as the captchas are less irritating to solve then.
uj8efdkjfdshf··on Why Are Plants Green? To Reduce the Noise in Photosynthesis
I think the point is that since the power available at these wavelengths vary sharply with frequency in these regions of the solar spectrum, the plant can easily compensate for brightness fluctuations in these portions of the spectrum with minor tweaks to the target wavelength of the relevant photosystems
uj8efdkjfdshf··on Public asked to report receipt of any unsolicited packages of seeds
Yep, they now exist in capacities of up to 1 TB. Also, SanDisk were the first (and probably only) company to sell 200/400 GB microSD cards, supposedly so that they could lay claim to having the highest capacity micro SD card.

https://www.techradar.com/sg/news/this-1tb-microsd-card-high...

uj8efdkjfdshf··on “Industrial Society and its Future”: the writings of the Unabomber
It's an English idiom used to describe someone mentally deranged.
uj8efdkjfdshf··on 2+1=4, by quinoa
The 1 cup of quinoa that you added to the start contributes the final missing cup (its packing ratio does not change much, it's just the water that changes its packing ratio).
uj8efdkjfdshf··on NASA rushing to complete Mars launch before planet moves out of range
Well, yes, NASA does rely a lot on external contractors due to the budgetary flexibility it entails. While there is some cross-communication between teams, it's generally limited by the extreme degree of specialisation needed. Also, as a general rule almost all of the hardware for any given mission is custom built for that mission, so the necessary knowhow to operate it is both unique and irreplaceable.

That said, some of the extra cost is due to scope creep, or due to changes in launch vehicle availability requiring the mission to be redesigned.

uj8efdkjfdshf··on NASA rushing to complete Mars launch before planet moves out of range
Because Mars and Earth takes different amounts of time to complete an orbit around the Sun, launching at the right point in time is absolutely essential to ensure that your transfer orbit takes you to the distance of Mars' orbit at the exact point in time that Mars will happen to be there. You can mess around with your transfer orbit parameters to give you a bit of leeway, but ultimately limits on available delta V and on maximum relative velocity on encounter limit the window of time that you have to launch your mission. See https://trajbrowser.arc.nasa.gov.

They have until mid August to launch the mission[0]. If not, the additional cost of keeping personnel employed and hardware maintained for the next 2 years or so while waiting for Earth and Mars to return to the same relative positions can easily cost $150m, if the InSight mission delay is any guide. [1]

[0] https://spacenews.com/mars-2020-launch-slips-three-days/ [1] https://spacenews.com/insight-delay-adds-150-million-to-miss...

uj8efdkjfdshf··on Weather widget reverse engineering and automation
There are many ways to do this, but the easiest way is to look at the Network tab in the browser developer tools as you load the page, type an address in, and generate the code.
uj8efdkjfdshf··on Researchers develop ‘poisoned arrow’ to defeat antibiotic-resistant bacteria
Well, antibiotic use is associated with diarrhoea and increased risk of C. difficile infections for this very reason. But the gut eventually gets recolonised by commensal bacteria - either from food or from the appendix[0]. In the worst case, we could always resort to probiotics or fecal transplants.

[0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3551545/

uj8efdkjfdshf··on The 180th Meridian (2016)
Why not just internally represent longitude as being between 0 to 360 (mod 360)? This way you won't have a discontinuity in direction when going from one longitude to another.
uj8efdkjfdshf··on Amphibious Warship USS Portland Shot Down a Drone with Its New High-Power Laser
Is that a Real Genius (movie) reference?

[0] https://en.wikipedia.org/wiki/Real_Genius

uj8efdkjfdshf··on Air-filtering bus to launch across six regions in the UK
It's interesting to note that the 65g was removed from the air over 9000 miles, which averages to particulate matter being produced at a rate of about 0.0045g/km. However, the parent article suggests that the buses have engines that conform to the Euro 6 standard, which according to Wikipedia[0] allows for up to 0.01g/kWh of particulate emission for heavy duty diesel engines in trucks and buses (0.0045g/km for all other categories). Given that [1] suggests energy consumption levels of around 2-5 kWh/km depending on powertrain type, it looks like the bus produces upwards of 5-10x the amount of pollution it actually cleans up.

So overall it looks like it would be more appropriate to market these buses as having a lower contribution to particulate matter pollution rather than actually cleaning up the air. Here's hoping that these buses actually transport people...

[0] https://en.wikipedia.org/wiki/European_emission_standards

[1] http://tf.llu.lv/conference/proceedings2015/Papers/060_Graur...

uj8efdkjfdshf··on Everything I Know About SSDs
It's over a disagreement between Cloudflare and the owner of Archive.is regarding the forwarding of EDNS metadata.

See here: https://news.ycombinator.com/item?id=19828317

uj8efdkjfdshf··on An idea from physics helps AI see in higher dimensions
May I recommend 4D Toys? It's made by the same guy who's developing Miegakure and it has a VR version. The controls are a bit limited though in that user-initiated rotations are limited to 3D.
uj8efdkjfdshf··on Particle accelerator fits on the head of a pin
I see. Well with high enough laser intensities the back reflection portion plateaus due to plasma formation [0], while the specular reflection portion could probably be minimised with a suitable prepulse[1,2] to pattern the surface. That said, the reflected intensity is probably still going to be pretty high, so I guess laser weapons are probably best reserved for long range combat.

[0] https://pureadmin.qub.ac.uk/ws/portalfiles/portal/124726142/... [1] https://www.ncbi.nlm.nih.gov/pubmed/21935245 [2] https://www.sciencedirect.com/science/article/pii/S016943321...

uj8efdkjfdshf··on When good ideas make bad business
Realistically, while I feel that the author is on the right track with this data driven approach to evidence based medicine, the fact remains that the advantages/disadvantages between drugs within the same class of medicine tend to be negligible compared to drug costs. There are then other specific concerns that must be considered eg pregnancy/breastfeeding, liver failure, kidney failure and often what ends up is that one defaults to a standard drug per drug class with alternatives in specific circumstances.

The real benefit IMO would be marketing this to countries with a top down healthcare purchasing system (eg the UK) or as a tool to drug companies/researchers looking to make their own meta analyses (eg abstrackr). It might also be better instead to diversify into correlating symptom clusters with diseases because then the utility to the end user is bigger.

uj8efdkjfdshf··on Particle accelerator fits on the head of a pin
What about masers? The atmosphere should be fairly transparent in that frequency range so no need to worry about scattering, and the wavelength is short enough so you don't have to worry too much about near field effects.
uj8efdkjfdshf··on Kutt – a modern, open-source URL shortener
If anyone is interested, I made a single page URL shortener some while back (technically 2 if you count the required .htaccess file).

[0] https://g.sia.nz/public-html/shortener/tree/master

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