studiot

Now you are finally beginning to answer a question, though I am not comfortable with all the bif words, many of which are IMHO just journalistic fluff. The question includes all Science, not just

How far back does you memory of 'computing power' go ? For instance the language Forth was developed for processors no more powerful than the humble 6502 (and if you know what that was you will know its address space and instruction list). Forth was used to control alrge (at the time) astronomical telescopes for precision survey and study of the heavens. I used to use a program called Design View, which was a luxury simulation program with full colour 3D visual capability that was originally designed for DOS - I still have the 3 floppies for loading it. I say luxury because it was luxury for mechanical systems compared to a spreadsheet.

So provide some examples of how the same data might require different treatment or lead to different conclusions interpretation in different parts of Science.

Congratulations I confirm my suspicion that you are adept at avoiding answering questions.

Not only is it multifactorial, but many of the factors are not economic ones at all.

Really ? And there was me thinking that the Earth moves approximately 1 degree relative to the Sun in the time it takes to revolve once on its own axis. That is why we have leap years.

Have you ever been taught how to provide a reference ? Or have you ever studied the subject of the science of measurement errors ? In particular do you understand the definitions of and differences between accuracy, precision, tolerance, limits and fits, significant figures, boundedness ? The last one is particularly relevent as Seth has quoted an inequality.

Very interesting about the vitamins, I had no idea, especially in a northern country that lacks the environment to grow the more tropical and subtropical produce. Many foods, including bread. are fortified by law in the UK. Noted Bear in mind yesterday's local elections where Farage seems to have done rather well.

I just noticed what to me is a new forum function, although it may be just that I never noticed it before. I have two screenshots of the summary function showing what I was offered at the top of a thread and what happened when I accepted the offer of a thread summary. Can someone explain how 'the most posts are selected' please ? I am not complaining about this function, just trying to understand it.

I would be interested to learn why you think this is so.

I'm glad there is something we can agree on. You keep referring to a stored version and similar concepts..... The universe is defined as everything there is. So where is this stored copy kept ? The only way I can see to make your model workwould be if the universe was actually like The Matrix (this time I am referring to the films). There is a problem with perception in that it can be tricked. Have you heard of Trompe L'Oeil for instance. All our senses can be fooled. That is why scientists strive for objectivity. Granting your little scheme to fool folks by changing the clocks could be achieved in a thought experiment, it would still fail becasueof external markers. For instance if I were to have my sleep by the seaside and be woken 2 hours early, with my watch advanced the extra 2 hours, I would immediately know this was wrong becasue of the incompatible state of the tide. I include information for you that I thought was relevant. If you don't even acknowledge it, this ceses to be a discussion.

What makes you think I haven't aready done that ?

But that didn't answer my question. FYI My family's association with the medical sector goes back generations. My daughter has a medical degree from Edinburgh and post graduate Pharmacy from Aberdeen. Her childhood friend who is the daughter of one of my wife's London University friends is now a consultant (if you know what that means) radiologist with the South london Hospitals group. (radiologists are in even shorter supply than radiographers). Of my daughter's medical friends one male is a consultant gynaecologist in Belfast, others have taken up various specialities. So, although not personally a medical professional I have long been very close to it.

You are posting a large number of statements and claims about certain aspects of Medicine. How much personal experience do you have of this? Or is this just stuff you are digging up to prolong the discussion?

Unfortunately you don't seem to understand what I am saying. You would not expect time and space to be exactly the same or there would be no point distinguishing between them. But They do share some common properties in our universe at least. One such property is that of continuity. Your model breaks that continuity, which is what I was trying to demonstrate with my train analogy. Most folks perfer and understand the train analogy more readily than taking cross sections. Perhaps your background would lead you to prefer that. Again Actually something like this already happens in reality. (what constitutes reality is a good subject for another discussion ). I mentioned the Terminator and tried to add a joke (mantion of Arnie was a joke but I can't get the joke emojis to work). It is the correct technical term for the dividing line between day and night which allegedly moves or seeps acroos the land (or around the globe). But of course actually the Terminator stays put and it is the the globe which revolves under it. Which brings me to another o0f your ideas. Have you heard of the block universe ? Because back along you only seem to accept that the present 'exists' (another word which needs clarification) so consider past, present and future and how they work. There are several possibilities. In the block universe they all coexist and time does not flow. Alternatively the present is some sort of terminator as a line between past and future and in your last post you seem to think that the past somehow disappears once the present has passed over it, just as the day dissapears when the terminator brings the night. Which brings us back to 'reality' . Night and day are abstract nouns but they and their difference have a dramatic effect on the material world. However as the terminator changes day into night it does not mean that New York dissapears, it is still there. Another common property of space and time is the behaviour of wavefronts. If you just write numbers along the space axis or the time axis the wave and wavefront appears indistinguishable (and continuous). Your description of a future which is not set is similar to a wavefront spreading out, but again from the source to the front is still there although the front has passed that region. So you need to consider all possibilities and choose one, giving your reasons for the choice. Then again you have not responded to my comment about the special meaning of the word event and coordinate systems which also has implications. As a final question can something which does not exist affect reality ?

There is no need to apologise, no one knows everything the main thing is that we learn when when encounter something we did not know before. The word event is specialised in spacetime theory as meaning a point in spacetime with specific coordinates (x,y,z,t) or (x, y, z ct) However nice as such a system is it actually contains redundant inappropriate information. Eddington explored this and also the consequences of multiple time axes. Both of these have consequences for any notion of time travel. Perhaps I am misunderstanding what you mean by individualistic ? Take a 1 metre ruler. It hast a beginning at 0 metres and an end at 1metre. In just the same way I am suggesting that I have a start point when I first arrive and a finish point when I die, in the time domain, allbeit that these points are a bit fuzzy. What I am suggesting is that just as you can't move the 0.5 metre point of the ruler to another location and still have a ruler, You can't move me aged 50 to another time and still have me.

Hey, guys I wouldn't have posted the link if I had though it was going to start a war.

I don't know who or what c. l. dean is or was, and don't really care as he is clearly not an ancient greek. This paradox is one of Zeno's and sounds rather clever. So clever that it took over 2 thousand years to resolve. Note a paradox is an apparent self contradiction, not an actual one. The secret of this lies in Cauchy sequences. Cauchy was the first to discover that the sum to infinity of a series or sequence can itself be finite and discuss the mathematics of this phenomenon. So the distance between each point diminishes as the divisions become finer and finer. So each division will take a shorter and shorter amount of time to traverse until zero time is reached for the 'last one' But it can be proved that the sum of all these times adds up to a finite total which happens to correspond to the distance = speed times time equation, just as all the inter division distances sum to the finite distance between the points. Note as a new member you have only one post left in your first 24 hours. Use it wisely.

Exactly +1 There was a recent health news BBC article about this subject. BBC NewsMale workers should be able to carry out mammograms, expe...The Society of Radiographers says allowing men to do mammograms would reduce staff shortages.

Firstly be aware that new members are allowed 5 posts only i9n their first 24 hours, for security reasons. So use your last post wisely, I don't think you are supporting your proposal very well as you are just reiterating what you have already said, although you are misusing some words which have a special meaning in Science in particular 'the fact that..' ; event ; I can't tell from this if you are agreeing or disagreeing with swansont but the onus is on you to support it. There are too many claims without support in your text and in particular it is not a fact that I as I did not say that, quite the reverse actually. SF stands for Science Forums not Science Fiction.

Reported Information should be presented on SF not elsewhere.

I agreed, but have you read the whole thread ? It has rambled far and wide. In particular my comment on definitions applies. The word Science has a range of definitions and it depends upon which one you choose.

The thing is that before you can talk about time travel you heve to define/explain exactly what you mran by 'time travel'. Consider railway trains. A railway train has a front and a back and, set aside relativity for the moment, a definite length in space. When referring to the train, space travel refers to the train as a whole, not to some individual carriage in the middle. We do not mean take a carriage out of the middle and replace it somewhere else on the track, leaving the rest of the train travelling along the track with a gap in the middle. So why should time travel refer to an object (living or not) in this way ? Why should time travel not refer to the entire duration of the object in time not just a chunk taken out of the middle somewhere ? No it is not a recording, anymore than the light and dark sides of a planet are a recording as the terminator (back in your box Arnie) passes over .

Trial aims to make airport operations sustainable https://www.bbc.co.uk/news/articles/cy9vwpqe5y8o

Had you read the rules you signed up to you would already know why your thread was moved to speculations. It was not dismissed at all. By way of explanation this site distinguishes carefully between mainstream Science and Hypotheses or Speculations. This is because it is also partly a teaching site and the owners do not want to put non tested hypotheses in with mainstream so ther should be no danger of the site disseminating inappropriate information. In order to do this the site has a speculations section, where there are some additional rules to place the onus clearly on the promoter of the hypothesis to support their proposals. I am telling you all this because it is a teasing suggestion and I look forward to you actually supporting it.