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Joshua Davidson
Attended University of Western Australia
Lived in Perth, Australia
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Joshua Davidson

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Perfection.

Imagine a universe that is perfect. Can it change? Is change part of perfection? If it doesn't change, can anything in the universe admire and recognise its perfection? If it isn't the entirety of all that is, is that then not really the universe?

Let us pretend that change is required for the universe. The next instant of time the universe is different in some way. That change can be compared. If the universe is better, then the old universe was not perfect, it was imperfect. At some point the universe will become worse. In which case the previous universe can't have been perfect, as a perfect universe would not become imperfect.

So the universe cannot be perfect.

Perhaps the room you are in could be perfect. Imagine the room you are in is perfect. As soon as you open the door, the room next door can now affect the room you are in, for better or worse. It could before too, but now it is obvious. If that room next door is not perfect, then your room is not perfect. Any system (such as the room) that touches another system measures its perfection in the sum of the systems, not the parts. Hence the universe is the place to start, hence if you can only see the universe from outside, then that observer is affecting the perfection of the universe... thus is part of the universe.

So perfection and change are not compatible.

I change. From the moment of conception to the moment of death is a long series (I hope it's long) of changes. Each one of these means that no single moment is perfect. But are they good enough?

Even at the lowest of the lows, the worse of my worst, I have learned and grown from them. Even if I failed to do so and just become worse and worse, I have the opportunity to choose to change into something greater, something better. I can chose to improve. I can learn from each horror, grow from each failure, and evolve from each mistake. That means that each of these lows and worsts is but a part of my being, a part of growing a part of becoming. They are not a mark of my lack of perfection, but a mark of me being good enough.

I have had some horrid experiences in my life. Quite horrid. They are things I use in my life now to help understand others. Thus they weren't useless horrors. They have been used to make me a better person. Not perfect, just better.

At each moment of my life I have been good enough. There is no point that I can look at, place my finger on my time line and say "there - that is where I wasn't good enough". I can merely say "there - I wasn't choosing that bit" or "wow - I learned a lot from that experience". I was good enough, despite the horrors that happened or the mistakes I made.

The only times that I can rightly look at my life and decide that it was bad is when I look at an experience and think "I can learn nothing from that". So far I have yet to do that. So there is no waste of my life, there is only experience that I can use to make improvements on now, to help me create a path of my improvement. And that is good enough.
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Today's cute
 
Beautiful photo of snail captured by Ukrainian photographer Vyacheslav Mishchenko
Via: Tolexo.com
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Water bending squirrel!
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lol
 
And they usually stop at p-n junction.
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Today's cute - bonus round
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Today's cute
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Today's cute
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Sponge Bob was a friend of mine.
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+Shaeolaura Davidson​ - clearly the best ghost buster :-)
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OMG YES
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Why you shouldn't get physicists drunk
 
It's not magic, it's physics.
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Perspective...
 
Sugihara's illusion explained

Wow!  These plastic cylinders look round - but in the mirror they look diamond-shaped.  If you turn them around, they look diamond-shaped - but in the mirror they look round!

This video was made by Kokichi Sugihara, an engineer at Meiji University in Tokyo.  How did he do it???

To answer this question, we should "science the hell out of it", as Matt Damon said in The Martian.   Figure out how objects change appearance when you look at them in a mirror... and design an object that does this!

And what's what +David Richeson has done:

https://divisbyzero.com/2016/07/05/sugiharas-circlesquare-optical-illusion/

You can also see Sugihara's whole video here.

The basic idea is this.  The top rim of this object is not flat.  More precisely, it's not horizontal: it curves up and down!  This affects how it looks.  If you're looking down on this object, you can make part of the top look farther away  by having it be lower

But a mirror reflects front and back.   So in the mirror, part of the top looks closer  if it's lower.

By cleverly taking advantage of this, we can make this object look round, but diamond-shaped in the mirror. 

And if we turn it around, this effect is reversed!

Here's a bit more of the math.  +David Richeson gives the details, so I'll try to present just the basic idea. 

Suppose you're making a video.  Suppose you're looking down at an angle of 45 degrees, just as in this video.   Suppose you're videotaping an object that's fairly far away.

Think about one pixel of the object's image on your camera's viewscreen.

Its height on your viewscreen depends on two things.  It depends on how far up that piece of the object actually is.  But it also depends on how far back that piece of the object is: how far away it is from your camera.   Things farther away give higher pixels on your viewscreen.

There's a simple formula for how this works:

pixel height = actual object height + actual distance back

(It's only this simple when you're looking down at an angle of 45 degrees and the thing you're videotaping is fairly far away.)

But what if we're looking in a mirror?  You may think a mirror reverse left and right, but that's wrong: it reverses front and back.  So we basically get
 
mirror image pixel height = actual object height - actual distance back

So, you just need to craft an object for which

actual object height + actual distance back

and

actual object height - actual distance back

give two different curves: one round and one a diamond!

But now for some puzzles:

Puzzle 1.  All that sounds fine: by cleverly adjusting the top rim of the object we can make it look different in a mirror.  But look at the bottom of the object!   What's going on there?  How do you explain that?

Puzzle 2.  Sometimes I know the answers to the puzzles I'm posing.  Sometimes I don't.  What do you think: do I know the answer to Puzzle 1 or not?

Finally, I should admit that I simplified the formula for the mirror image pixel height.  Actually we have

mirror image distance back = constant - actual distance back

and thus

mirror image pixel height =
actual object height + mirror image distance back =
actual object height + constant - actual distance back

In other words, I ignored a constant.  This constant is why the whole mirror image looks higher on your viewscreen than the original object!
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Work
Occupation
Social Worker, Recovery expert, Mental Health, Thriving
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  • Social Worker, Recovery expert, Mental Health, present
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Previously
Perth, Australia
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Tagline
A catalyst for change, promoting a positive future
Introduction
I was born, I have lived, and I learn.
Bragging rights
Have a daughter - that's right, I managed to breed!
Education
  • University of Western Australia
    Bachelor of Social Work, 2001 - 2007
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Joshua, Pantera, JoMiDa
Joshua Davidson's +1's are the things they like, agree with, or want to recommend.
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