|
Yes, I realized how stupid that sounded after posting it. Plenty of other countries have fog, it is just the stereotype from what I've read. London = rain and fog, California = sunshine (not the CP variety) etc
Why 1957 in particular?
|
|
|
|
|
Indivara wrote: I've read. London = rain and fog,
I've read. Japan = Samurai warriors and peasants!
We have less rain than many countries these days; it is hot (26C) and dry as I type this.
Indivara wrote: Why 1957 in particular?
It was round about then that the government banned the use of coal (and other dirty fuels) for domestic use, thus reducing the pollution in the air and the resulting smog(smoke filled fog) in the winter. The overall weather patterns and infrastructure also began to change which affected the amount of fog produced.
|
|
|
|
|
It has been almost that thick here since yesterday in Vancouver BC. Unfortunately due to the smoke from all the forest fires this year... 
|
|
|
|
|
That is terrible. I was over there this time last year and the air was beautiful and clean. Although not quite as clean as when I was travelling there between 1963 and '65.
|
|
|
|
|
I get a two week head start on this problem.
The flight leaves at a very early hour.
Realistically, I'll have to leave my home around 04:00 local (four in the morning) to make it.
On normal days, I awaken around 07:00
The last time I needed to make an early flight, the power went zero right smack dab in the middle of my shower.
Result: Missed flight // Me the big fool
I'm telling you, that was a solarbanite day.
The suggestion has been made that I just stay up all night, get a shower at 03:00, and drive to the airport and sleep in the terminal and on the plane.
Anybody got a better idea ?
|
|
|
|
|
How many time zones are you going to be crossing and in what direction? Can you not forego the shower or is it meant to wake you up more than clean you?
What you really need is a nice strong man to lift you sleeping from your bed, transfer you to the airport, check you in and carry you on to the flight all without waking you but I don't suppose you know anyone that would do it! 
|
|
|
|
|
When I came back from Germany, I stayed overnight in St Louis. I had a dream that I missed my flight and was running through the airport try to catch it. Woke up then. Scared me so bad I stayed up the extra 5 hours.
But that was before the days where we had cell phones that had alarms built into them....
You can lead a developer to CodeProject, but you can't make them think.
The Theory of Gravity was invented for the sole purpose of distracting you from investigating the scientific fact that the Earth sucks.
|
|
|
|
|
Man up.
Prepare something light you can get into as soon as you wake up (caffeinated if that's your thing - but just enough to get you to the airport). Ensure you have all your stuff ready to go, then just set your alarm at 3:30, wake, shower, eat or drink whatever you prepared, get in the car and go.
You eat at the airport or on the plane. Sleep on the plane (not at the gate, blissfully sleeping as your plane rolls out). Hit the coffee at whatever is your normal time and get on with it. You'll be totally fine for the morning, a little rough mid afternoon, and so plan an early night.
Staying up all night is a bad idea: you'll be useless the next day. If you're crossing lots of timezones and you're spending the day on a plane then maybe that would work for you, but ensure you get the times right otherwise you'll just make it worse.
cheers
Chris Maunder
|
|
|
|
|
Depending on how long your flight will be, you will be quite dead when you arrive. Sleeping at the terminal either will make you feel even worse or et you miss your flight.
As an old soldier, I would have everything packed and ready. When the alarm (clock, not the sarge anymore  ) goes off, I jump into the shower, then jump into my clothes, grab my stuff and off I go. I am still used to doing that in complete darkness, but I still have some of those.[^]
Hamid: What's that?
Rambo: It's blue light.
Hamid: What does it do?
Rambo: It turns blue.
Who said you can't learn anything useful from watching Rambo?
The language is JavaScript. that of Mordor, which I will not utter here
This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a f***ing golf cart.
"I don't know, extraterrestrial?"
"You mean like from space?"
"No, from Canada."
If software development were a circus, we would all be the clowns.
|
|
|
|
|
That was my Monday morning every week for three years, I know this game.
Rules are:
- Sunday have a good lunch and only light dinner.
- As per Chris, get everything ready before you go to bed.
- I always showered before bed, but whatever tickles you is fine.
- Go to bed in good time, you can nip off two hours from a normal nights sleep if you must but get to bed in good time.
- I used one, but maybe have two alarms.
- Aim to be active and fast, but not rushed, from when you get up. I used to be up, dressed and out of the door inside ten minutes.
- When you get to the airport, checked in and air side then you can relax a bit. Make sure you know where the gate is and then get a good coffee and try to relax.
veni bibi saltavi
|
|
|
|
|
In accordance with lounge rules "discussing anything in a software developer's life that takes your fancy except programming questions", here's a request for feedback on a time dilation example -
The movie Interstellar includes examples of time dilation.
My objective is to be able to provide a simple explanation and example of time dilation.
Is my link below a good time dilation example or does it require correction or more clarification?
http://www.oproot.com/a/nav/if/time-dilation.html[^]
To access via mobile device, go to oproot.com > experiments > time dilation example
Position and time were once thought to be absolute. Newton's laws of motion discredit absolute position in space. Einstein's theory of relativity discredits absolute time. The time dilation effect comes from the nature of spacetime.
Time and space are now seen as dynamic quantities with each individual particle, or planet, having its own unique measure of time depending on where and how each is moving.
- The Illustrated A Brief History of Time, Stephen Hawking, Page 45
In the example link, there are 4 observers with 4 synchronized clocks. 2 observers are on the surface of the earth. 1 observer is in space above the earth. 1 observer has returned from a high-speed space mission.
When regrouping the clocks are different -
Observer 1 surface clock is 12:25. (O1)
Observer 2 surface clock is 12:25. (O2)
Astronaut 1 clock is 12:28. (A1)
Astronaut 2 clock is 12:21. (A2)
Extra credit question -
Are there any science experiment ideas (on a budget) that can be performed to demonstrate time dilation?
|
|
|
|
|
|
Thank you for the feedback and catching the axis/longitude error. I've updated the text. 
|
|
|
|
|
The record holder in time travel by time travel time dilation, as far as I know, is still the Russian who was stuck on the space station Mir 25 years ago when the Soviet Union came to an end and they took their time to get him down. He gained something like half a second total.
The language is JavaScript. that of Mordor, which I will not utter here
This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a f***ing golf cart.
"I don't know, extraterrestrial?"
"You mean like from space?"
"No, from Canada."
If software development were a circus, we would all be the clowns.
|
|
|
|
|
What helped me understand time dilation, not that I 'understand' it, was the explanation of how the speed of light is constant within a reference point.
In order to maintain this constant speed of light, time dilation takes place. So for a person travelling in a car, at 50 mph, for their reference point the light coming out of the headlamps is not the speed of light +50mph but the speed of light(i.e. if they measured the speed of the light coming out of their headlamps) as their time dilates due to the 50mph speed their car is travelling at.
Now it gets more interesting when two cars are moving towards each other with a closing speed of 100mph - the light from the opposite car is still perceived as travelling at the speed of light and not the speed of light +50mph(the light speed measuring car's 50mph having been explained in the previous paragraph).
If someone can explain how time dilation works in this context that would be great 
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
modified 6-Jul-15 2:10am.
|
|
|
|
|
- Each car is moving toward the other at 50 km/h relative to an observer on the ground.
- The relativistic addition of velocities gives a relative velocity for the two cars of slightly less than 100 km/h (first instance of time dilation).
- Light emitted at a given frequency carries its own clock with it, namely the frequency. Therefore when this "clock" is read in another frame of reference, it will exhibit both the classical Doppler effect and time dilation, together known as the relativistic Doppler effect (second instance of time dilation).
I hope this helps a bit.
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
|
|
|
|
|
Brilliant, thanks
I will read up more on this now, the light carrying its own clock with it helps.
“That which can be asserted without evidence, can be dismissed without evidence.”
― Christopher Hitchens
|
|
|
|
|
As far as I understood, space is bent stronger around a fast object (or a large mass, which is essentially the same due to E = mc^2). The light has to travel a longer distance through the curvature.
The language is JavaScript. that of Mordor, which I will not utter here
This is Javascript. If you put big wheels and a racing stripe on a golf cart, it's still a f***ing golf cart.
"I don't know, extraterrestrial?"
"You mean like from space?"
"No, from Canada."
If software development were a circus, we would all be the clowns.
|
|
|
|
|
You are confusing gravitational lensing (an effect due to General Relativity) with time dilation (and effect due to Special Relativity).
The essential difference between Special and General Relativity is that Special Relativity ignores gravity and only gives a partial treatment of acceleration, while General Relativity assumes that as we cannot tell the difference between gravity and acceleration, they should be treated as equivalent. All manner of problems are solved (and created) by this assumption...
If you have an important point to make, don't try to be subtle or clever. Use a pile driver. Hit the point once. Then come back and hit it again. Then hit it a third time - a tremendous whack.
--Winston Churchill
|
|
|
|
|
An experiment to demonstrate (prove) Relativity in the kitchen is stretching things a bit.
However real evidence of the predictions of Relativity (General and Special) is present in the global GPS system. The orbiting GPS clocks would gain about 38 microseconds relative to earth clocks causing about a 10km error every day. This is made up of a loss of 7 microsecs due to the speed of orbit and a gain of 45 microsecs due to the effect of gravity. This is accounted for by making the GPS clocks tick more slowly by 38 microsec a day done before they are launched.http://www.astronomy.ohio-state.edu/~pogge/Ast162/Unit5/gps.html[^]
Peter Wasser
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts." - Bertrand Russell
modified 5-Jul-15 21:19pm.
|
|
|
|
|
|
The Operator wrote: The movie Interstellar includes examples of time dilation
Bad examples. REALLY bad examples.
With regards to the water planet they said that they'd had 2 decades (or whatever) of data from the person who was meant to land, but when they arrived they all suddenly surmised that the previous astronaut had landed mere minutes before them.
ARGH!
Time still passed. Both parties left from the same place and arrived at the same place and travelled more or less through the same gravitational fields, so if they left 20 years apart they would arrive 20 years apart. It's just that their clocks wouldn't match the clocks back on earth (or a clock outside of the pull of the nearby blackhole)
/bangs head.
cheers
Chris Maunder
|
|
|
|
|
|
I feel you would be better off concentrating on one effect at a time, and first discuss the effects of speed/acceleration, then maybe adding in gravity. Einstein once said (supposedly) 'moving clocks run slow' - this doesn't explain anything, but confirms what needs explaining.
|
|
|
|
|
I'm sorry but...
The only thing I can say for sure about the movie "Interstellar" and time (dilated or otherwise) is that it was a complete waste of mine 
Sometimes, it just is, OK!
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
