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uj8efdkjfdshf's comments

uj8efdkjfdshf | 5 years ago | 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 | 6 years ago | 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 | 6 years ago | 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 | 6 years ago | 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 | 6 years ago | 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 | 6 years ago | on: Launch HN: Scanwell (YC S18) – At-home UTI test with same-day treatment options

Some questions here:

Is quantitative testing possible especially if you use a colour reference chart to compensate for lighting conditions?

Do you have any measures to prevent the patient from scanning the dip stick too soon?

What processes do you have in place to pick up red flags eg recurrent UTIs, pyelonephritis, urosepsis etc?

What measures do you have in place to ensure appropriate antimicrobial prescribing? This includes managing patient expectations in the event of a positive test result.

uj8efdkjfdshf | 6 years ago | on: Yakovlevian Torque

Given that the rostral (head) end of the neural tube literally bends inward (cephalic flexure) as it grows into the enclosed space of the head to later become the brain, and that the tip is also attached to a clump of cells that will become the heart (cardiac anlage) which is also migrating downwards with the tip of the neural tube and to the left side of the chest, it is altogether unsurprising that the brain should be slightly pulled to the left.

uj8efdkjfdshf | 6 years ago | on: I was seven words away from being spear-phished

That's interesting - there is indeed a grh37 at Cambridge but he's an undergraduate studying Chemistry at Selwyn. No idea about how that happened, but there's been a bunch of really poorly written Emotet/Heodo spam emails floating around the email system the past few years. I'd guess that he managed to get his account compromised while logged into Windows on a UCS computer (which would be a feat in itself, given how poorly written the first stage dropper is), his UCS account got compromised, and someone uploaded the malicious website to his public_html folder.

EDIT: Apparently they've blocked new user signups for DS-Web, but this is kinda pointless given that every new student is automatically given their very own live website until they graduate.

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