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  2. Profile of Colin2B
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Messages - Colin2B

Pages: [1] 2 3 ... 282
1
General Science / Re: What caused rope to spin while pulling stuff 6 stories up?
« on: Yesterday at 23:16:34 »
Quote from: jfoldbar on Yesterday at 18:26:43
from the underneath side looking up, the scaffold spun clockwise.
That would make sense. Most ropes of this sort are 3 strand with a right hand lay. This means that in construction the rope is tightened by twisting the end anticlockwise, so when it is stretched (as described by @Bored chemist ) it will untwist clockwise when viewed from below.

2
General Science / Re: Are space and time just two sides of the same coin?
« on: Yesterday at 16:59:06 »

Might be time to take a pause and look at some basics here because I think there are some misunderstandings.

Minor point. Ideas generally come before models, but not always. Take eg of Copernicus, before him the idea was that the sun orbited the earth. The top mathematicians of the day, the Arabic scholars, struggled to find a model that worked with this idea. Copernicus came up with a different idea, that the earth orbits the sun from which a model of the planetary system could be developed.

Quote from: Seafire on 30/06/2022 01:37:06
Perhaps you're still convinced that movement needs a time dimension to facilitate it but are unwilling to stand up for your conviction.  ;)
That depends what you mean by dimension and what you mean by facilitate.
Physics defines seven primary dimensions: length, mass, time, temperature, electric current, amount of light, and amount of matter. I suspect you would only consider one of those to be a dimension, that’s because the common usage of dimension is very different from the physics usage.
Facilitate movement? Certainly we know that any movement has a start position and time, and an end position and time (physics calls these points events and there are an infinite number of such events between start and finish). Whether you consider time to facilitate that movement is debatable, but I would say not. For example, we measure the temperature dimension, but it would be unusual to suggest that the dimension facilitates temperature. Temperature is facilitated by other causes, we just measure the effect.

Quote from: Seafire on 30/06/2022 01:37:06
The idea that there is a past, present and future is speculation when all we know is the present. I remember where objects were before they moved (past), and I can predict where objects will be after they move (future) but memory and prediction of movement is far from being evidence of a time dimension. This is a mistake and one that is rearly admitted.
I’m not sure who you think rarely admits it. I would agree if you are talking about the general population, but physicists (and philosophers) frequently debate this area. Your view is a form of temporal presentism, but there are many other options including block universe. So, you have nailed your colours to a particular wall, some would agree with you, but there are others who would say you are wrong to do so.
I tend to think in terms of a dynamic view of time. Do I believe that somewhere in spacetime Anne Boleyn is still being executed, or WWII is still being acted out, no. However, I would never be as arrogant as to say that my view is correct and all other views wrong.
@Halc has probably looked at all the different philosophies, but I suspect your accusatory tone might have put him off further discussion.

Quote from: Seafire on 01/07/2022 18:15:00
…….as long as you remember they are just imaginary.
Imaginary has a different meaning in physics to common usage. It does not equate to not real, as in unicorns are not real.

Quote from: Seafire on Yesterday at 03:25:47
Quote from: Origin on 02/07/2022 12:17:38
I understand you for some reason don't like that time is a dimension,
Pesky empirical evidence. :o
If you can devise an experiment that will provide unequivocal empirical evidence of your idea, then you will be in line for a Nobel prize. The reason there is so much debate and varying views in this area is because there is no empirical evidence.
There is, however, a lot of evidence that our common sense view of distance is affected by relative movement, and that what is the past for me might in some circumstances be the present for someone else. Distance is also affected by gravitational potential, so 2 people at different heights above the earth could disagree on vertical measurements.
Experiments in particle accelerators also tell us that distance is not what our ‘common sense’ might suggest.

Quote from: Seafire on Yesterday at 03:25:47
I want to meet you at Joe's in 10 unicorns, of course we will have to set up a convention for one unicorn like the swing of a pendulum or the movement of the sun, however we won't need to set up a convention for the spatial dimensions because they actually exist and we can measure them directly.
As Origin points out, you are confusing units with dimensions.
Hours and unicorns are units and arrived at by convention, so are distance units.
Also, there are many things we cannot measure directly, but that doesn’t mean they don’t exist.
Interestingly there are many people who have a very good sense of time and can tell to within 15mins what time it is, and musicians have a very good time sense otherwise there would be no consistent rhythm.

All in all this is quite a complex subject, but I’m glad you are taking the time to think about it.

3
New Theories / Re: An essay in futility, too long to read :)
« on: 02/07/2022 07:54:20 »
Quote from: alancalverd on 01/07/2022 17:34:28
Quote from: yor_on on 01/07/2022 10:07:43
Then we have temperatures and green house gasses as carbon dioxide, each one limiting your crop yields.
Indeed. Local market gardeners add CO2 to their greenhouses (never mind 400 ppm - these guys go for a toxic 1 - 5%) to maximise crop yields. Forestry officers around the world have noticed steadily improved tree growth over the last 150 years.

Certainly CO2 is a plant growth promoter. In the Early Carboniferous, global atmospheric carbon dioxide levels were around 1,500 parts per million, astronomical in comparison to modern values and was part of the reason for such large plants. The plants pumped oxygen into the atmosphere in large concentrations, and carbon dioxide started to be locked into our, now, coal & oil seams.  Carbon dioxide levels were down to around 350 parts per million by the Middle Carboniferous and the high plant growth reduced.

4
Chemistry / Re: Phase Transfer Catalyst(PTC)
« on: 01/07/2022 08:37:51 »
Please amend your post title as a question and ask a science question in the first post
Thank you

5
Chemistry / Re: Importance Pharmaceutical And Chemical Industries
« on: 01/07/2022 08:37:09 »
Please amend your post title as a question and ask a science question in the first post
Thank you

6
Technology / Re: What Question Could You Ask To Determine Sentience Of An AI ?
« on: 30/06/2022 21:53:29 »
Quote from: alancalverd on 30/06/2022 18:59:51
The fun question to ask of an AI system is whether it could design a tool that would allow it to do something it isn't already designed to do.
I seem to recall that there has been an attempt to patent an invention in the name of an AI. I must check, but I think British patent office said only people can be named as inventor, but somewhere else allowed it.

I’m thinking of retraining as an AI psychologist. As there can’t be that many around I ought to be able to train myself.

7
Just Chat! / Re: FAULT on the website?
« on: 30/06/2022 16:28:14 »
I'll have a look

8
Just Chat! / Re: FAULT on the website?
« on: 30/06/2022 13:52:25 »
What size of post are you working on?

9
Technology / Re: What Question Could You Ask To Determine Sentience Of An AI ?
« on: 29/06/2022 23:00:07 »
Quote from: neilep on 29/06/2022 12:25:38
seems that there's a hurdle of definitions which need to be agreed before one can even ask the question i.e. agree on the definition of the question ?
We even need to agree what the answers might mean.
Putting aside the obvious question “do androids dream of electric sheep” we might ask whether the réponse from AI could be interpreted as in any way similar to our experience of consciousness.
Take the fear of death=fear of being turned off or erased. The AI might say it fears being erased, but for us fear is a combination of effects, adrenaline, anxiety, increased heart rate etc which the AI will not experience. So is it saying it fears death as a genuine fear (whatever that means) or just responding in a way that the average person might ie giving an expected response.
It might be worth starting with an easier question, such as is a sheep sentient and what question would you ask to determine that state?

10
General Science / Re: How much of me is original?
« on: 29/06/2022 22:13:57 »
Quote from: Harri on 29/06/2022 21:14:17
I know my dna remains the same
I wouldn’t be so sure about that. DNA does mutate as it passes from cell to cell and we age.

Quote from: Harri on 29/06/2022 21:14:17
For instance, will any of the original heart I was born with remain with me now?
I would say not a lot, if any, of the original cells. Usual quoted cell replacement is between 7 & 10 years, but can be shorter for important organs.

11
New Theories / Re: An essay in futility, too long to read :)
« on: 29/06/2022 22:05:58 »


Quote from: yor_on on 27/06/2022 21:36:49
If Mr Putin has expressed it that way, I would say he's correct. It reminds me very much of a gang of bullies in the schoolyard, fighting and threatening, and then onlookers, unsure of whom to cheer.
When I was at school the bullies were often the bigger, older boys who would pick on the weaker newcomers. Either you had something they wanted or just didn’t like the way you looked, talked etc.
Generally this tactic of aggression worked, but occasionally they misjudged the strength of an assumed weaker opponent and got a bloody nose. Or friends of the victim rallied round to provide a defence.
These defenders were never considered bullies, but protectors of the weak. The thing that defined the bully was that they used violence first.

12
New Theories / Re: An essay in futility, too long to read :)
« on: 29/06/2022 10:18:47 »
Quote from: yor_on on 29/06/2022 09:43:19
Hmm. I will state from my point of view, which is fairly simple…
I have never altered anyone’s posts to change the meaning.
I can only speak to actions I have taken, whether you choose to believe or not is entirely up to you.

13
New Theories / Re: An essay in futility, too long to read :)
« on: 29/06/2022 09:18:08 »
 
Quote from: yor_on on 28/06/2022 13:43:49
It's easier handling trolling
That’s because we’ve been helping you out by sending warnings to the trollers and removing some of their inappropriate posts, some you might not have seen.

Quote from: yor_on on 28/06/2022 11:04:21
You don't want this essay here, it's pretty controversial, am I correct? Then just say it.
That’s a strange statement considering the efforts we’ve made to keep you from being banned, despite your best efforts to the contrary. As long as you respect the spirit of the rules there is no problem.
I don’t see anything controversial here, most is quoted information or opinions of others.
If I had time I would make comments on your views around superposition and decoherence, but I think you’ve found some references that help you see what is really happening - I’ll check.
Anyway, I will look back and see if there are points I can contribute to and keep your thread a discussion as per rules, and I’m sure Alan will do the same.

14
General Science / Re: Are space and time just two sides of the same coin?
« on: 29/06/2022 08:53:56 »
Quote from: Seafire on 29/06/2022 03:30:32
[it's liberating to admit mistakes, you should try it.
I often do. Why do you assume I don’t?

15
Geology, Palaeontology & Archaeology / Re: What animal made this footprint?
« on: 29/06/2022 08:51:00 »
Quote from: Petrochemicals on 29/06/2022 06:45:52
…plus there appears to be an 'L' under neath the middle toe, so it must be a left foot.
Ha ha  ;D

16
Technology / Re: What Question Could You Ask To Determine Sentience Of An AI ?
« on: 28/06/2022 18:02:12 »
Quote from: Halc on 28/06/2022 15:44:28
But Lambda can be copied like we cannot, so if I were to ask it any questions, I'd pose my queries along those lines: What if you were copied?  What if two copies were somehow merged? What if you were 'moved' to new faster hardware? Would the old hardware fear being turned off still?
That’s an interesting one. It echoes the question raised in Star Trek, does a transported person die on disassembly and be reborn at the other end. Certainly cloning to new hardware and then turning off should mean death to the old AI.

17
Physics, Astronomy & Cosmology / Re: How does special relativity explain dimensional components ...
« on: 28/06/2022 17:47:41 »
Quote from: Dimensional on 27/06/2022 22:33:12
Quote from: Origin on 27/06/2022 22:10:12
Quote from: Dimensional on 27/06/2022 21:01:07
Here may be a clearer way to see my issue.  Imagine a very simple universe where there only exists object A and an object B.  They are on a collision course.  Scientist A, (from another dimension) uses object A as a point of reference.  But scientist B (from yet a different dimension than scientist A) uses object B as a reference.  Each scientist is going to end up with a different description of this universe from using special relativity.
So what's your issue?
That each scientist is going to end up with a different description of this universe from using special relativity.
This really doesn’t need scientists from a different universe and it isn’t down to special relativity.
It was Galileo who first pointed out that if you were in a cabin on a ship you would not be able to tell if the ship was moving, or in which direction unless you had information from outside the room. He concluded that it was reasonable to consider two moving ships as one stationary and the other moving or vise versa and the laws of physics remain the same. For example, if a ship is moving and firing a cannon at a stationary ship, the trajectory of the cannon ball relative to the first ship is exactly the same if the first ship is stationary and the second moving. When we consider this scenario in space where there are no fixed references, it becomes more obvious. It is called Galilean Relativity. Einstein added the effects of the constancy of the speed of light and extended Galileo’s principle to Special Relativity.

18
New Theories / Re: An essay in futility, too long to read :)
« on: 28/06/2022 10:42:20 »
Quote from: yor_on on 28/06/2022 09:19:32
Still not about the essay Collin.
It’s very much about that and clarity of what you are trying to say.

19
New Theories / Re: Origin of magnetic force
« on: 28/06/2022 07:16:55 »
Quote from: paul cotter on 27/06/2022 22:14:02
Bored chemist, much as I hate to do this, you are in error. I have it on good authority that there is only one unicorn. Hence the correct expression is "the unicorn did it". I don't have to remind you of the rigour needed in all such scientific matters, correct units, correct dimensions and of course correct unicorn.
Please state your authority.
I have it on excellent authority, my granddaughter, that multiple unicorns exist, apparently in many colours. However, I will concede that it is possible that only one unicorn was involved in the action (usually the pink one if I recall @Bored chemist correctly), so your expression would remain correct.

20
General Science / Re: Are space and time just two sides of the same coin?
« on: 28/06/2022 07:04:25 »
Quote from: Seafire on 28/06/2022 03:04:48
I would like to explore with you nothing more than the available evidence, that being the three observable dimensions of space and the three dimensional objects that move in it. Time therefore is just another way of expressing the three spatial dimensions. eg. I am 3 miles from home or I am 3 minute from home.
Ignoring relativity for the moment, 3 miles is a fixed dimension - assuming say shortest distance, but 3 minutes is a variable depending on your speed. How does your model handle that?

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