Random Thoughts 7

  • Thread starter Evo
  • Start date
  • #876
Every year, scores of boaters travel the 6,000-mile route around the Eastern United States.
https://www.atlasobscura.com/articles/loopers-great-loop-experience
The Great Loop has been called the last great adventure in North America, a 6,000-mile journey from the Mississippi River to the Gulf Intracoastal Waterways, around Florida and then up the Atlantic coast, across the Erie Canal, and through the Great Lakes. In 2022, only 227 boats returned to their point of origin, “crossing their wake” and earning the privilege of flying the gold Great Loop burgee (flag). Most “Loopers,” traveling in boats at least 30 feet long, took about a year to complete the route. Omaha Nebraska’s Mike Straub completed the loop in just 91 days. He did the whole thing on a Sea-Doo jet ski.

I think retracing the Lewis and Clark expedition would be a great adventure.
 
  • Like
Likes Borg
Physics news on Phys.org
  • #877
Anyone know how to interpret a 'perimeter acre'?

Perimeter Acres133,489.06

from: https://www.kptv.com/wildfires/

perimeterperimeter acres
1.14179.5
3.86226.09
4.4701
50.8218432.12
147.4384364.39

Plugging in the numbers from the above fires, I get an R² of 1.000 for a quadratic function: y = 2.1122x² +264.07x -474.36

where y is 'perimeter acres' and x is the perimeter, in miles.
 
  • #878
OmCheeto said:
Anyone know how to interpret a 'perimeter acre'?

Perimeter Acres133,489.06

from: https://www.kptv.com/wildfires/

perimeterperimeter acres
1.14179.5
3.86226.09
4.4701
50.8218432.12
147.4384364.39

Plugging in the numbers from the above fires, I get an R² of 1.000 for a quadratic function: y = 2.1122x² +264.07x -474.36

where y is 'perimeter acres' and x is the perimeter, in miles.
A perimeter acre is probably defined as
$$\frac{\text{length of the wildfire's perimeter}}{\text{area of wildfire}}.$$
 
  • #879
I'm guessing that "perimeter acres" means the area (near the perimeter) that is actually on fire, assuming the area in the middle is burnt out.

Then the average width of the burning area is approximately the "perimeter area" divided by the "perimeter length" (assuming the width is a lot smaller than the length).

NamePerimeter length
##p## miles
Perimeter area
##a## acres
Estimated perimeter width
##a/(640p)## miles
Converted
to yards
##\times 1760##
Lemolo
2.14​
179.5​
0.13106​
231​
Ore
3.86​
226.09​
0.09152​
161​
Trail
4.4​
701.38​
0.24907​
438​
Larch Creek
50.82​
18432.1​
0.56671​
997​
Lone Rock
147.43​
84364.4​
0.89411​
1574​

The values seem plausible.

(For readers outside the UK and US, a yard is about one metre.)
 
Last edited:
  • Like
Likes OmCheeto
  • #880
Crowdstrike, anyone? Ive yet to look at my computer. ( Assuming people who have more than one OS installed).
 
Last edited:
  • #881
OmCheeto said:
Anyone know how to interpret a 'perimeter acre'?

Perimeter Acres133,489.06

from: https://www.kptv.com/wildfires/

perimeterperimeter acres
1.14179.5
3.86226.09
4.4701
50.8218432.12
147.4384364.39

Plugging in the numbers from the above fires, I get an R² of 1.000 for a quadratic function: y = 2.1122x² +264.07x -474.36

where y is 'perimeter acres' and x is the perimeter, in miles.
Seems not to be defined at x=1, where you get a negative value.
 
  • #882
DrGreg said:
(For readers outside the UK and US, a yard is about one metre.)
And I thought it as a little place behind the house. :cool:
 
  • Haha
Likes OmCheeto
  • #883
fresh_42 said:
And I thought it as a little place behind the house. :cool:
With two dogs in it.
 
  • #884
WWGD said:
With two dogs in it.
Must be Chihuahuas if it is limited to 91 cm.
 
  • Haha
Likes pinball1970
  • #885
docnet said:
A perimeter acre is probably defined as
$$\frac{\text{length of the wildfire's perimeter}}{\text{area of wildfire}}.$$
So it's 1/length? Length is like wavelength, and 1/wavelength is frequency, so....
What's the frequency, Docnet?

DrGreg said:
I'm guessing that "perimeter acres" means the area (near the perimeter) that is actually on fire, assuming the area in the middle is burnt out.

Then the average width of the burning area is approximately the "perimeter area" divided by the "perimeter length" (assuming the width is a lot smaller than the length).

NamePerimeter length
p miles
Perimeter area
a acres
Estimated perimeter width
a/(640p) miles
Converted
to yards
×1760
Lemolo
2.14​
179.5​
0.13106​
231​
Ore
3.86​
226.09​
0.09152​
161​
Trail
4.4​
701.38​
0.24907​
438​
Larch Creek
50.82​
18432.1​
0.56671​
997​
Lone Rock
147.43​
84364.4​
0.89411​
1574​

The values seem plausible.

(For readers outside the UK and US, a yard is about one metre.)
I agree, that this seems like a plausible answer.
But I suspect it is wrong.
I loosened up my Google search parameters and discovered this PDF of a 1976 document, where I found on page 64:

Figure 7.--Approximate​
area of wind-driven​
fires, using Anderson's​
double-ellipse formulae​
in appendix II. In​
this figure, the area within the approximate​
perimeter (acres) has​
been divided by the​
squared distance (in​
chains) from the point​
of origin to the head​
of the fire. Thus,​
this ratio decreases with windspeed while​
the area itself actually increases.​

where they use 'chain' as a unit of measure, and Anderson's double-ellipse formulae in appendix II looks to be a rabbit hole of maths.


WWGD said:
Seems not to be defined at x=1, where you get a negative value.
At least it didn't include the square root of negative 1.

In any event, never mind.
 
  • Like
Likes WWGD
  • #886
OmCheeto said:
So it's 1/length? Length is like wavelength, and 1/wavelength is frequency, so....
What's the frequency, Docnet?
The quantity perimeter/(surface area) is just a concrete measure of... perimeter per surface area (sorry for the redundancy, but it was so self-explanatory that I'm just so puzzled with your question.

If it helps, the quantity could be loosely interpreted as the "oscillation count" of the perimeter to measure how "wavy" or "curvy" the perimeter is. But there is probably no benefit in defining it using frequencies and wavelengths. The quantity would have a minimum value (corresponding to a circle) and no maximum value (corresponding to certain fractals).

In any case, it may not be the right interpretation of the data, continuing this tangent may not be helpful. I was just trying to offer an alternative.
 
  • #887
jack action said:
  • At 18, they ask for 5-year experience;
  • At 50, you are too old to work;
  • At 62, you are too young to retire.

So true, to complete the story:

- I notified management on April Fool's that I plan to retire on May 1st
- I retired on May 1st and
- I got to exclaim May Day! May Day!

As so many retirees don't know what to do in the days following retirement.

Retirement is NEVER what you expect it to be.
 
  • Like
Likes fresh_42
  • #888
jedishrfu said:
As so many retirees don't know what to do in the days following retirement.
I may try being a rock star full time.
 
  • Like
  • Haha
Likes BillTre and fresh_42
  • #889
pinball1970 said:
I may try being a rock star full time.
Honestly?

I wish you all the best and seriously hope you will!
I mean, if Taylor can.
 
  • #890
WWGD said:
Crowdstrike, anyone? Ive yet to look at my computer. ( Assuming people who have more than one OS installed).
Crowdstrike provides security add-on to Windows for businesses, not personal computers. Are you a business? Do you pay them to provide their service to you?
 
  • Like
  • Informative
Likes Astronuc and BillTre
  • #891
fresh_42 said:
Honestly?
A little tongue in cheek yes, BUT there would be no more restrictions on practice and gigs.
If we have a gig in London or Scotland we have to set off 12ish so I have to book days off.
Certainly make things easier that way.

EDIT: The bassist is 68 and seems relaxed with his retirement and still doing music. Hopefully I can find similar.
 
Last edited:
  • #892
Retirement has kept me surprisingly busy.
 
  • Like
  • Love
Likes Astranut, collinsmark, Borg and 2 others
  • #893
fresh_42 said:
Honestly?

I wish you all the best and seriously hope you will!
I mean, if Taylor can.
Yes, he can jerk about global warming while touring the globe solo in his mega jet. Taylor did it.
Leason. Be more like Roger Taylor, not the other one.
 
  • #894
phinds said:
Crowdstrike provides security add-on to Windows for businesses, not personal computers. Are you a business? Do you pay them to provide their service to you?
Hence the "anyone?".
 
  • Informative
Likes phinds
  • #895
WWGD said:
Yes, he can jerk about global warming while touring the globe solo in his mega jet. Taylor did it.
Leason. Be more like Roger Taylor, not the other one.
We all manage to fit in one van for gigs so the planet is safe from me!
 
  • Haha
  • Like
Likes Astranut, BillTre, WWGD and 1 other person
  • #896
WWGD said:
Yes, he can jerk about global warming while touring the globe solo in his mega jet. Taylor did it.
Leason. Be more like Roger Taylor, not the other one.
What do you have against Swift? Ok, it's a bit clumsy, however, it's simple.
 
  • Like
Likes BillTre
  • #897
pinball1970 said:
We all manage to fit in one van for gigs so the planet is safe from me!
I haven't had a car in a while. My gas is the only contributor. I see people avoid me, but only within a 100ft radius.
Edit: Just please leave the van. Down by the river!
 
  • #898
Musk moving X and Space X from California to Texas.
 
  • Informative
  • Like
Likes Astranut and pinball1970
  • #900
WWGD said:
I haven't had a car in a while. My gas is the only contributor. I see people avoid me, but only within a 100ft radius.
Edit: Just please leave the van. Down by the river!
It is a horrible, ugly, uncomfortable, old thing but we love it. Even when It broke down in Macclesfield when we had a gig in Derby! It is a re-done UK Royal mail van. We only take two vehicles if we are also supplying the PA as well.
I took this from vehicle 2 on way to Lakes.

IMG_20230923_153637_224.jpg
 
  • Like
  • Haha
Likes OmCheeto, Astranut, WWGD and 1 other person
  • #904
I hate CC. My body needs less energy to heat up and I struggle to lose weight.
 
  • Like
Likes pinball1970
  • #905
CC?
 
  • #906
Climate Change.
 
  • Sad
Likes pinball1970
  • #907
fresh_42 said:
I hate CC. My body needs less energy to heat up
So you are saying that you are the one to blame for global warming because you are not picking up your share of heat?
 
  • Like
Likes WWGD
  • #908
jack action said:
So you are saying that you are the one to blame for global warming because you are not picking up your share of heat?
I blame it because I do pick up my share of heat.
 
  • #909
I just stay out of the kitchen.
 
  • #910
It may have been Karma. I was asked to introduce two people( new hires) to each other. I told them wrong names of each other and told them both the other was very hard of hearing. Then I had to work with them and it was a nightmare.
 

Similar threads

Replies
3K
Views
143K
Replies
2K
Views
156K
Replies
14
Views
2K
Replies
4K
Views
213K
Replies
1
Views
760
  • Sticky
Replies
0
Views
2K
Replies
8
Views
1K
Back
Top