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Everything posted by openspaceman

  1. I think @tree-fancier123 has covered it. As I read it most infected people out in the open air will cough out relatively large droplets, the chance of breathing one in will be small beyond 2 metres. In other, indoor, situations where droplets may be smaller ( I don't know why but they mention hospital procedures) the virus stays in the air and half of them disappear after 3 hours, it would take a further 3 hours to half the remainder and so on. Now this may have limited consequence to most of us while only a small proportion of the public are infected and in the environment, where droplets and contact with surfaces will remain the main means of infection but with doctors and nurses up close and personal it looks like it becomes significant. IMO they should only be examining people with a full hood, just like those Porton Down technicians did in Salisbury and not worry what the patient thinks.
  2. You misquoted me, I reported a half life in air. A quote from this lady: Dr. Angela Rasmussen (interview recorded March 15, 2020) "Yeah, so a great pre-print just came out. I like to pitch my collaborators at Rocky Mountain Labs, this is Neeltje van Doremalen who is with Vincent Munster at NIAI Rocky Mountain Labs have just released a preprint with some of their colleagues, I believe at Princeton, showing that SARS-coronavirus-2 and SARS classic have some different properties as well as some similar properties for remaining infectious on various surfaces. So they looked at experimentally generated aerosols, which for SARS-coronaviruses is only an issue for the most part in hospital settings where there are aerosol generating procedures, but they showed that for both of these, the aerosol half-life is only about three hours. So that's good news in that you know, if somebody that you love or care about is working in a hospital or an ICU or is getting treated there, these aerosols are not going to persist for days at a time in the environment. They also looked at survival of the virus on copper, stainless steel, plastic and cardboard, and the virus lasts the longest on stainless steel and plastic. So it lasts 48 to 72 hours, and it can potentially be there for longer than that, but what's important to note is that there was a three-log reduction, so a thousand times less virus that was infectious after 72 hours. So, even though you can detect infectious virus on surfaces, plastic or stainless steel surfaces after three days, it's a greatly reduced amount of virus. Compared to SARS classic, SARS-coronavirus-2 lasted longer on cardboard, however it didn't last longer than 24 hours. So before everybody gets worried about getting packages in the mail or opening letters or calling, ordering stuff from Amazon it, it also was essentially undetectable after 24 hours. So cardboard is probably not a surface that's going to retain the virus for, for days and days at a time. What we don't know is the effect that temperature and humidity and other environmental conditions would have on this "
  3. Which I worry is how so many medics are succumbing to it, true a droplet can contain many viruses and falls to the floor quickly but the virology suggests a virus has a half life in air of 3 hours. What is unknown is what viral load entering the lungs will overcome normal defences.
  4. I worked briefly alongside an old lag who was mustard with furniture restoration, a very quiet bloke but he did tell me how his boss would buy a select piece and then he would disassemble it and make new parts, when he reassembled them there were two antiques for sale. He did the time, his boss didn't.
  5. No it's 3ph and draws 12 amps when switched as delta and 7 when switched as star. I think that means you start it star and then once it's running switch to delta although both those voltages time Amps give the same ~2.7kW it makes 2.7 kW with a power factor of .8 so you need to supply 1.25 as many amps at the voltage to get that power. A 3ph Tesla powerwall perhaps might run it.
  6. I've a pond which was excavated in chalk on the woodland I volunteer on, it was lined with clay but plainly leaks as it empties in the summer. how deep does the clay have to be to seal a pond?
  7. Does no one else think this 2m distancing mantra gives a false sense of security? The virus has a half life of 3 hours in air and this 2m advice is based on the rate at which a droplet containing the virus will settle out of the air. I think statistically it may be a decent predictor but, to my mind, because of the rate of infection and morbidity in less than elderly medical staff severe exposure is much worse. ATM no one knows how many viruses infected people shed nor how many virus actually survive the body's defences and mucus membrane to enter a cell and replicate RNA
  8. There was 3 years between my using a 261 and a 550 mk2 but I was impressed by the 550 moreso than the 261 and I felt the shape was better.
  9. My brother's widow gave it away before I could get my hands on it. I got the two bikes though 🙂
  10. I can't see much plastic being released from a plastic net twixt producer and consumer's black waste bin, washing polyester shirts or strimming grass however...
  11. So you sit it out for the rest of your quarantine, get cleared to travel home and have to start a quarantine as you have to assume you have become infected travelling but your wife is vulnerable and needs shielding, rock or hard place.
  12. Full guidance on staying at home and away from others - GOV.UK WWW.GOV.UK This is the HTML link and I'd say it is still ambiguous. It looks like if you work alone and don't meet people you can or have I missed something?
  13. Good grief David, fingers crossed for a good outcome and yes if daughter is on chemo she is definitely in the vulnerable group and needs shielding.
  14. Starlings and Yaffles seem to hunt for them, I tend to use Nikwax spray or neatsfoot and beeswax if mine gets scuffed
  15. I wish, I haven't seen a live one since it left my garage 2 years ago, I still have half a bag of hedgehog food
  16. The perceived wisdom is that they happily coexist when there is plenty of food but badgers will take them when not. Of course in past times badgers were hunted so their population has grown and hedgehogs haven't learned to cross the road and not curl into a ball when a car approaches.
  17. It's the microscopic nature of the plastic in a tea bag getting into compost that annoys me, I can dispose of a net bag sensibly by putting it in the black bag rubbish but I don't want to put something that is otherwise compostable into the black bag.
  18. There's a couple of points I've been dwelling on, yes it will persist and most will catch it, current effort seems to be to drive the reproducibility below 2, i.e. currently each infected person is infecting two others, such that the number infected is doubling every 3 days. Japan is down to doubling every 20 days. The other thing is that the young doctor who tried to publicise the outbreak in china himself died which worries me. Could it be that our immune system can cope with a small initial infection but constant exposure becomes lethal?
  19. 1969 the first edition had a song called Ruby, I was at Finthen airbase in Germany and first came across homogenised milk, it was flown in from US everyday, the planes went back with black plastic bags for the return trip, the song was banned on the base.
  20. 25 allowed in crematorium chapel but that may change on Monday, service relayed by loudspeaker to those outside. Wake was cancelled Friday I was surprised but my daughter's dog, in my profile picture, will be allowed to travel in the limo and enter the chapel.
  21. I dearly wish you never have to
  22. My younger daughter's funeral and close family will have a cup of tea and scones in the garden after. We will have a proper gathering at a later date.
  23. I recently got a bag of dried food for the dog so no problem there for a few weeks. I was unable to buy bread and eggs in the village, don't need much else. We have a family do which cannot be postponed but my wife was able to get some basics from the local garden centre café as they destock, mostly by doing take away till Monday. As it's reported that 25% of our food comes from takeaways, cafes, pubs etc it would seem sensible for them to maintain their supply chains and do some retail to take the pressure off elsewhere.
  24. Nor I, they used the cylinder over pressure from a port where the decompressor is on many saws now, @adw is the expert on them


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