Paul Sutton

Personal Blog & website

Worlds oldest shipwreck

How the world's deepest shipwreck was found – BBC Future

This is a really interesting article from the BBC Futures website, US navy ship sunk during a battle with the Japanese navy during WWII has been found deep in the Ocean 70+ years after it was lost at sea.

As the article suggests 'We know more about outer space than the Oceans', however, there is another article following on from this on how NASA are using what we are learning about deep sea exploration and using that to help with space exploration. If you scroll down the page then you should find:-

Why Nasa is exploring the deepest oceans on Earth

Which gives more information, it shows how an interest or experience in what would seem very different, can be applied elsewhere, so an Oceanographer for example can work with NASA to help explore planetary systems.

So perhaps some very exciting things to come in the future.

Demo of Physics Ideas

I am in a slow process of collecting some materials for the Five DIY physics demos from Symmetry Magazine. So far I have:-

  • String
  • Rubber Balls
  • Small metal ball bearings
  • Rubber Sheet
  • Ping pong balls

With a 30cm x 30cm sheet of 1mm thick rubber. This can be used to demonstrate space and a ball or other object placed on this will bend the sheet around it.

The image from Open Clip art – sort of illustrates this in terms of a black hole.

warping

This makes sense if you understand the physics, just hard to explain here.

I need some tennis balls, but I can pick them up easy enough. Hopefully I can do some of this at the next STEM group meeting, if not it is something that can be undertaken in a school, where I can get help from teachers & technicians. I don't think a TA is expected to do the whole demo :)

I am not sure if I can get hold of iron sand easily, but a school can though.

On a sort of related note, chemistry related I have downloaded a worksheet to investigate neutralisation of toothpaste from the Royal Society of Chemistry education resources. Again this could be useful when working in a school.

Searching for information – Debian release notes

One essential skill is to be able to search for information. This is expected of people before they ask questions. In looking for Debian release notes I tried a search on the Debian website, only to find a link to Debian 3, and also Debian 12 which is the next release.

release notes

If you get a similar issues, I would suggest redoing the search in something like DduckDuckGo or similar . Searx, is a privacy respecting meta data search engine.

Links

TAGS

#Debian,#Website,#Search,#ReleaseNotes,#Results


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Use pastebin from command line

Use pastebin from command line

Quite often, when you have a problem where, in order to get help you need to paste the contents of a file,or command output so that it can be shared, for example on IRC (Chat) or a forum, this can be challenging to begin with.

As it is depreciated that you paste more than 2 lines in to IRC chat. The way round this is to use a service called pastebin. Debian [1] has it's own service for this [2]. There is a tool called pastebinit which is really helpful from the command line.

The first step is to switch to the root user. Sear for and install the package pastebinit as per below.

Search

root@Desktop:/home/user# apt search pastebinit
Sorting... Done
Full Text Search... Done
pastebinit/stable 1.5.1-1 all
  command-line pastebin client

Install

root@Desktop:/home/user# apt install pastebinit
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages were automatically installed and are no longer required:
  linux-image-5.10.0-7-amd64 linux-image-5.10.0-8-amd64
Use 'apt autoremove' to remove them.
The following NEW packages will be installed:
  pastebinit
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 46.6 kB of archives.
After this operation, 342 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian bullseye/main amd64 pastebinit all 1.5.1-1 [46.6 kB]
Fetched 46.6 kB in 0s (342 kB/s)
Selecting previously unselected package pastebinit.
(Reading database ... 190310 files and directories currently installed.)
Preparing to unpack .../pastebinit_1.5.1-1_all.deb ...
Unpacking pastebinit (1.5.1-1) ...
Setting up pastebinit (1.5.1-1) ...
Processing triggers for man-db (2.9.4-2) ...
root@Desktop:/home/user# 

Once complete switch back to normal user (usually type exit)

user@Desktop:~$ cat /etc/apt/sources.list > pastebinit
user@Desktop:~$ cat /etc/apt/sources.list | pastebinit
https://paste.debian.net/1228146/

In this example I have used the cat command and piped the contents in to pastebinit, this has given me a url to paste in to chat, (or copy manually)

Open this in a browser and you and others can see the contents, and people can help you further.

paste bin it output

This is really useful too if you are stuck at the command prompt, without a graphical interface.

Links

1 Debian 2 pastebin – debian 3 Paignton Library STEM Group TAGS

#Debian,#GNULinux,#Paste,#Text,#Pastebin,#Share,#Troubleshooting


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Trojans boot camp 2022 5

Fantastic work today. Next session is on :-

Date : Sunday 30th January 2022 Time : 10 am —> 13:00

Location : Foxhole playing field, Bellfield Road, Paignton

2022 is here, so on with training and we are no upping the training to include contact football in preparation for the season ahead.

Tilde – text editor

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Tilde is a nice, curses based text editor. It is useful for if you are at the console or terminal in Linux and want a menu driven editor.

tilde

While other tools are more command driven (nano, emacs, vi, vim and joe to name a few). Tilde is being mentioned for those of you who may find it useful

As you would expect with a modern editor, tilde has support for syntax highlighting.

Tilde Syntax Highlighting

Which is really useful for programming or editing website code for example.

REFERENCES

TAGS

#YearOfTheFediverse,#Linux,#TextEditor,#Editor,#Text, #Tilde,#Programming,#SyntaxHighlighting,#console, #terminal

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Google Analytics declared illegal in the EU

This news has just broken.

Could have some interesting implications, even though the UK has left the EU, the UK has adopted the GDPR.

A good step for people currently using google analytics would be to swtich to something like Matomo (see link below) which is an alternative.

Links

Tags

#EU,GDPR,Ruling,#GoogleAnalytics,#Illegal,#Alternative,#Matomo,#Data,#Privacy,#DataProtection

2021 — DIVISIONAL PLAYOFF

NFL Division playoff

22nd and 23rd Jan 2022

Smart windows can significantly reduce indoor pathogens

Smart windows can significantly reduce indoor pathogens

Posted to Mastodon.

The researchers found that, compared to windows with blinds, the smart windows significantly reduce bacterial growth rate and their viability. [1]

Comment

An idea / question from this is could this technology be used on space missions to help protect spacecraft from harmful UV radiation but also take advantage of sanitising properties of UV Radiation. As a quick reference, I have put a link to a wikipedia article below, please note: Wikipedia is not an academic source of information the link is there for reference purposes only.

Perhaps discuss at a STEM group meeting or on a forum. Links

TAGS

#YearOfTheFediverse,#FediverseRising,#Science,#Technology,#ScienceDaily,#ScienceDaily,#SmartWindows,#UVFilters,#Pathogens


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References

University of British Columbia Okanagan campus. “Smart windows can significantly reduce indoor pathogens: Daylight can disinfect surfaces.” ScienceDaily. ScienceDaily, 19 January 2022. www.sciencedaily.com/releases/2022/01/220119121350.htm.

Journal Reference:

Man In Lam, Kinga Vojnits, Michael Zhao, Piers MacNaughton, Sepideh Pakpour. The effect of indoor daylight spectrum and intensity on viability of indoor pathogens on different surface materials. Life Sciences (accepted), 2022 [abstract]