1

Just Chat! / Re: Mathematics is a decent science.

« on: 17/06/2021 00:32:25 »

Hi.

   Why do you (Nakedscientists) have a thousand sections for life sciences (that was just a rough count) and not one section for Mathematics?  Mathematics is everywhere but life sciences are only useful in a small number of real world situations.
   Let's say Jane went shopping and picked up a thing that required her to evaluate an integral over a closed path on the complex plane.  Alternatively consider John, who was out walking in the sunshine when he had a need to generate an infinite sequence of numbers that are co-prime but not primes.    Where are these people going to get help with their serious problems?

General maths is not a science, unlike economics or statistics which is a way of interpreting data through maths.

2

COVID-19 / Re: How effective are the Russian and Chinese coronavirus vaccines?

« on: 24/05/2021 23:10:23 »

Effective is different for each person's viewpoint in my opinion. Astra zenica is 100 percent effective from stopping deaths according to the US study, but only 60 per ent effective at total prevention, but really the stopping of deaths is the important bit. The China vaccine is apparently 60 percent effective, yet has made no impact on the mortality rate in Chile as of today, with 40 percent totally immunised.

www.bbc.com/news/world-latin-america-56731801.amp

Given that 2 in 3 people never know that they had corona, the 60 percent figure of total effectiveness begins to look questionable.

3

Just Chat! / Re: Spammy product

« on: 18/05/2021 21:11:49 »

Mmmmm, spam.

4

Just Chat! / Re: I'm a Troll

« on: 05/05/2021 21:38:09 »

R0d7fe0505d6a23bdc91d43e01ad69dd8.png (336.04 kB . 588x1737 - viewed 2382 times)e

5

Physiology & Medicine / Re: Does castration (physical or chemically induced) eliminate sexual desire?

« on: 27/04/2021 22:23:22 »

Anecdotal evidence based on vicars' legs suggests that it doesn't work on pets, so there's no reason to suppose it would work on humans.

We'll never achieve peace and order and discipline while there is human sexual desire. Only when sex is thrown away, will real scientific civilisation become possible.

That is the root of much in religion. We are not fornicating animals, but higher intelligences. The fixation on what is a biological reproductive neceßity is contrary to the conscious awareness and soul of humans.  But the hormones get the better of people.

6

Technology / Re: How to de-ice cable-stayed (and suspension) bridges while open for traffic?

« on: 24/04/2021 02:27:19 »

You may find this enlightening.

https://www.powerandcables.com/impact-mitigation-of-icing-on-power-network-equipment/

7

Physics, Astronomy & Cosmology / Re: What's the brightness of a star 16 times wider but half as hot as the Sun?

« on: 20/04/2021 22:06:01 »

would a star with a radius 16 times that of the sun, but a surface temperature 0.5 times that of the sun, be more or less luminous than the sun?
You can assume the surface area of a sphere is A=4 pi r squared

I cant seem to work this out. Can anyone help please?

As a measure of lumens as in luminosity, given that star  temperature is pretty much indicative of star colour, less energy than would be mathematically expected by the formula for surface area, that is to say less high end light. I am not sure of neutrons.

Could a star have a diameter increaced of only 16 times yet be less luminous? Some sort of red dwarf?

8

Just Chat! / Re: Top ten medical breakthroughs the past four decades?

« on: 08/04/2021 01:19:36 »

4 decades? That would mean 1980.  I think you are showing your age.

9

Physics, Astronomy & Cosmology / Re: What causes nuclear power plant meltdowns?

« on: 03/04/2021 22:30:19 »

Fukushima was correctly designed to withstand the "100 year" tsunami but not the 1000 year beast that killed it.

With pumps situated on the floor. D'oh.

10

Physiology & Medicine / Re: Is it desirable for Mankind to be smaller in stature?

« on: 27/03/2021 00:59:44 »

Reputable information from that authority on alien intelligence (the MIB franchise) suggests that it is possible to hide a tiny alien inside a robot dog... (IIRC)

Tiny_Alien_MIB.png (249.2 kB . 589x320 - viewed 3965 times)

Nope I believe he was a tall sanguine man


If the brain stayed the same size but the body shrank Mankind would be phenomenally clever.

https://en.m.wikipedia.org/wiki/Brain-to-body_mass_ratio

Bigger people need bigger brains to keep parity, but also require more food and bodies seem to be subject to greater strain. Given that Mankind is in its evolutionary position because of the brain but is also in reaching in size due to the brain, we seem to be going down an evolutionary defeating path.

11

Physiology & Medicine / Re: Could human beings hibernate?

« on: 09/03/2021 22:53:02 »

Technically, we can. Bears and even some primates are able to hibernate, which means us humans are also able to do so.

Technically bears do not hibernate, the go into something called a torpor. I am unsure of the primates. Hibernation has the body temperature drop to ambient to the point that some animals drop just below 0c body temperature, the head being just above. The metabolic rate almost ceases unlike in bears.

https://sciencesimplyexplained.com/do-bears-hibernate-in-winter/

I have just remembered humans who cease to breath and circulate blood often are capable of being revived if they have been at very low temperatures even if it is a matter of hours without breath, so in a way hiberhation is possible in humans. I am not sure of the medical processes of decomposition or damage, really you need a medical person for that, but cold seems to stop this. I believe it requires a quick chill though.

https://www.sciencedirect.com/science/article/pii/S0300957214005243

12

Physiology & Medicine / Re: Could human beings hibernate?

« on: 05/03/2021 11:00:41 »

Technically, we can. Bears and even some primates are able to hibernate, which means us humans are also able to do so.

Technically bears do not hibernate, the go into something called a torpor. I am unsure of the primates. Hibernation has the body temperature drop to ambient to the point that some animals drop just below 0c body temperature, the head being just above. The metabolic rate almost ceases unlike in bears.

https://sciencesimplyexplained.com/do-bears-hibernate-in-winter/

13

Just Chat! / Re: I think I know why many don't accept global warming

« on: 24/02/2021 20:56:11 »

Does everyone not accept climate warming, the argument seems to be the cause.

Everyone accepts that the Earth's climate naturally changes over time. That's why the Earth has been through a succession of Ice Ages, and warm Interglacial periods, for the past 3,000,000 years.  And much further back than that. Heck, 700,000,000 years ago, the entire planet was supposedly frozen all over as Snowball Earth. And in the later Carboniferous Period, the planet was a giant hothouse, with huge ferns and 18" dragonflies swarming all over.

All that is part of the natural order of things. 

I think what gets people's goat is this: the modern suggestion, pushed in our faces remorselessly by the media, that whenever the climate changes nowadays, even a bit:

IT'S ALL OUR FAULT!

This suggestion is so ludicrous that can you wonder why people don't accept it. And suspect some conspiratorial motive behind it.

Don't forget this is pushed into the face of the proletariat by idealistic monied people's with no real proof of the cause and lots of the "why don't you buy bamboo clothes and drive electric cars?".

14

Just Chat! / Re: Member type

« on: 21/02/2021 22:59:39 »

So Chris is very lazy.

15

Just Chat! / Re: Why should I be bothered with lockdown?

« on: 21/02/2021 22:52:42 »

I think that we shouldn't have done any "lockdowns".  We should've just let the virus run its course.

We'll have to do that in the end.  All this flim-flammery of lockdowns is just a futile attempt to stave off the inevitable.

We can't beat the virus. It's too microscopic  Face-masks won't block it.. It will get everywhere. And infect everyone.

It's just Nature's way. 

The vulnerable could have shielded without the general population, their experience would have at worst been exactly the same, but probably lots better than the one that they and everyone  else have experienced. Anybody anybody over 55 or who needed to  protect themselves could have been put on a pension.

Face masks clearly do not work.

https://www.thenakedscientists.com/forum/index.php?topic=80639.0

16

New Theories / Re: Is Bilĺ Gates the problem more then the solution?

« on: 02/02/2021 01:30:55 »

Are not all these vaccines" not for profit" ?

17

Physiology & Medicine / Re: Could electrical interference disrupt your body without making contact?

« on: 30/01/2021 09:42:36 »

And these ovens, as you know, can cook meat.  And as our brains are, essentially, made of meat, they can be cooked by the microwaves.

Time was that you were told not to put your head in the gas oven. Nothing has changed.

That was with town gas, these days you don't need to put your head in the oven with natural gas, just wait for the explosion.

There is a serious risk for people with pacemakers from areas that have heavily saturated magnetism.

https://www.heart.org/en/health-topics/arrhythmia/prevention--treatment-of-arrhythmia/devices-that-may-interfere-with-icds-and-pacemakers

18

COVID-19 / Re: Would an extended dosage interval work for the Oxford vaccine?

« on: 13/01/2021 00:41:03 »

I think the single astra zenica is similar the published 2 dose efficacy of 70%. Probably one of the reasons the government opted for one dose.

19

Physics, Astronomy & Cosmology / Re: What falls faster: heavy or light objects?

« on: 09/10/2020 22:11:34 »

Galileo was wrong and the aristotlewas correct, his balls did hit the floor at different times,it's just not really percept able.

What falls faster a neutron star or the comet that killed the dinosaurs?

20

Technology / Re: Altering orbits using earth's magnetic field or generated fields from earth?

« on: 27/05/2020 22:35:24 »

I assume the energy you are hoping to create is due to your movement through the field ? This is a law of physics that escapes me at the minute but it had something to do with an airplane oving through the earths magnetic field and how much charge it would create its also constrained by energy conservation, basically you have to put energy in to the movement to get the electrical energy out.

Is it possible to use the earth's magnetic field to move around in space, or even take off from earth?

The earth’s magnetic field is very weak compared to the force required to move a spaceship. It can move a magnetised needle on a low friction support, but anything heavier like a bar magnet on a desk doesn’t move. Also even a weak bar magnet will easily overpower the earth’s field and influence a compass needle
As we get further from earth the earth’s magnetic field gets weaker, but a magnet will still be able to align along the field see

Notice how the magnet is stronger than the earth’s magnetic field.

How about the radiation fields ?