Joe Rowing
@jrowing.com
Physics. Education. Other things. https://www.JRowing.com
I often recommend doing the “radioactive balloon” demo (charge balloon, hang it up to collect daughter ions of natural decay processes, wait, measure) when talking about background. Here’s the trace from before, to after placing the deflated balloon next to the Radiacode.
May 21, 2025 at 8:38 AM
I often recommend doing the “radioactive balloon” demo (charge balloon, hang it up to collect daughter ions of natural decay processes, wait, measure) when talking about background. Here’s the trace from before, to after placing the deflated balloon next to the Radiacode.
Another shot of the Radiacode app. The green is a 7day background reading I took at home, in modern brick built. The yellow is current picture building up underground in an old stone home in Devon.
May 21, 2025 at 7:11 AM
Another shot of the Radiacode app. The green is a 7day background reading I took at home, in modern brick built. The yellow is current picture building up underground in an old stone home in Devon.
Just a couple of shots of the app, location redacted.
May 20, 2025 at 6:40 PM
Just a couple of shots of the app, location redacted.
Not sure if I shared this here - this is my new Radiacode detector the WWII clock that lives (in a case) on my desk at home. Using it with the app is even better.
May 20, 2025 at 7:36 AM
Not sure if I shared this here - this is my new Radiacode detector the WWII clock that lives (in a case) on my desk at home. Using it with the app is even better.
Getting fancy now with my Birdnet plots #Birdnetpi #pretty_graphs
May 7, 2025 at 12:18 PM
Getting fancy now with my Birdnet plots #Birdnetpi #pretty_graphs
Apparently red is the most common colour on a national flag, but not everyone uses the same red. (I'm interested why it's so common). It's not my idea then but I was able to make it with R. Having ideas like this is really helping me learn the language. I wonder what I should do next.
May 6, 2025 at 4:37 PM
Apparently red is the most common colour on a national flag, but not everyone uses the same red. (I'm interested why it's so common). It's not my idea then but I was able to make it with R. Having ideas like this is really helping me learn the language. I wonder what I should do next.
New toy for pointing out stars. It’s supposed to be sub 1mW. I really don’t think it is. Remember folk, these are not toys, they’re jolly dangerous and it is criminal to sell lasers under rated like this. If anyone has a good source for a genuinely 1mW green laser pointer, please let me know.
May 6, 2025 at 11:56 AM
New toy for pointing out stars. It’s supposed to be sub 1mW. I really don’t think it is. Remember folk, these are not toys, they’re jolly dangerous and it is criminal to sell lasers under rated like this. If anyone has a good source for a genuinely 1mW green laser pointer, please let me know.
Sankey diagrams for exam paper analysis? Why not.
May 5, 2025 at 7:19 PM
Sankey diagrams for exam paper analysis? Why not.
Did a bit more playing this morning:
April 29, 2025 at 7:24 AM
Did a bit more playing this morning:
Joy-bird, the intersection of pop album covers and data from the garden.... www.jrowing.com/posts/MoreBi...
April 28, 2025 at 7:43 PM
Joy-bird, the intersection of pop album covers and data from the garden.... www.jrowing.com/posts/MoreBi...
I've been playing with my BirdnetPi recently. A good excuse to learn some R and brush up on the statistics. In the manner of an irreformable tinkerer, I've re-written my website (again), another thing done in R.
www.jrowing.com/posts/Confid...
www.jrowing.com/posts/Confid...
April 28, 2025 at 9:48 AM
I've been playing with my BirdnetPi recently. A good excuse to learn some R and brush up on the statistics. In the manner of an irreformable tinkerer, I've re-written my website (again), another thing done in R.
www.jrowing.com/posts/Confid...
www.jrowing.com/posts/Confid...
It has been a little while since I did a radioactivity, or any CPD sessions. Looking forward to talking to ITT teachers from Exeter University. Resources at bit.ly/keepfitonthewireless #iTeachPhysics
December 8, 2023 at 10:48 AM
It has been a little while since I did a radioactivity, or any CPD sessions. Looking forward to talking to ITT teachers from Exeter University. Resources at bit.ly/keepfitonthewireless #iTeachPhysics
Yep. Pretty cool things.
November 28, 2023 at 2:43 PM
Yep. Pretty cool things.
Another day, another proof of gravitational attraction. I'd like to try and get a value for G sometime. #iTeachPhysics
November 22, 2023 at 10:23 AM
Another day, another proof of gravitational attraction. I'd like to try and get a value for G sometime. #iTeachPhysics
Staggeringly this actually worked in that the central bar rotated over 40mins and rotated back on the removal of the bowling balls #iTeachPhysics
November 17, 2023 at 2:22 PM
Staggeringly this actually worked in that the central bar rotated over 40mins and rotated back on the removal of the bowling balls #iTeachPhysics
How does the mirror KNOW? (Spoiler: it doesn't, it's just reflection) www.geogebra.org/m/kfvrkxnf
November 11, 2023 at 10:55 PM
How does the mirror KNOW? (Spoiler: it doesn't, it's just reflection) www.geogebra.org/m/kfvrkxnf
I am often moving around between lab rooms and schools. This is my trunk of essentials. I'll list what I have soon but I was wondering what you would include... #iTeachPhysics
November 8, 2023 at 2:29 PM
I am often moving around between lab rooms and schools. This is my trunk of essentials. I'll list what I have soon but I was wondering what you would include... #iTeachPhysics
Found some old photos of "my" inductive gate. Just up the road from me. The induced e.m.f. in this gate is enough to light a bulb, or create a spark to an earthed passing walker (yes, me).
November 7, 2023 at 9:56 PM
Found some old photos of "my" inductive gate. Just up the road from me. The induced e.m.f. in this gate is enough to light a bulb, or create a spark to an earthed passing walker (yes, me).
Graph drawing practice...
November 7, 2023 at 9:38 PM
Graph drawing practice...
Awesome - Off to Europa! (well, in name anyway)
November 7, 2023 at 8:35 AM
Awesome - Off to Europa! (well, in name anyway)
Posted this elsewhere recently but it's too good... Note: it's a re-used balloon, please don't waste helium. Also note - the box has a mass inside that looks like it's balancing it but in reality it's taped to the table. Moral: even the obvious solution might not be as it seems #iTeachPhysics
November 6, 2023 at 8:57 PM
Posted this elsewhere recently but it's too good... Note: it's a re-used balloon, please don't waste helium. Also note - the box has a mass inside that looks like it's balancing it but in reality it's taped to the table. Moral: even the obvious solution might not be as it seems #iTeachPhysics
Now look what you made me do....
November 6, 2023 at 8:47 PM
Now look what you made me do....
Whilst I'm on the topic of old favourites:
November 6, 2023 at 8:18 PM
Whilst I'm on the topic of old favourites:
One of my favourite images - I really need to update it though #iTeachPhysics
November 6, 2023 at 8:08 PM
One of my favourite images - I really need to update it though #iTeachPhysics