Thursday 20 October 2022

variant of game - server room twister jenga yoga tai-chi frogger ...

New game for Scouts or engineering geeks maybe ;)
Good idea triggered by comment from a work colleague of mine.

Server rooms come in all sorts of shapes and sizes.
Some are well organised and others have more chaos!
When you work in them you often have to step carefully and elegantly and dodge and twist around equipment and cables.
Especially if you are debugging you might have to move in new equipment and search for boxes and follow different cables and plug in / un-plug and re-plug cables.
It can become quite an epic single-person twister jenga yoga tai-chi game!

This is maybe less common now with servers moving to cloud managed in big datacentres which are probably more organised with respect to cable routing and connectivity.
Even the area behind your TV should be getting more simple.

Anyway.

Game is a bit like jenga as well as twister - with elements of yoga and tai-chi - and frogger(slippy log croc dodging river crossing).
You don't hold the position like twister (unless a really cruel session of routing re-plugging multiple cables is needed! - or indeed cleaning optical cables before connecting)
In real life server rooms without a map lots of the clambering can be needed to just find the right boxes and ports.
I have had great fun in past.

Ideal location and equipment:

Old decomissioned server room with some old unused boxes, cables(power, ethernet and other), etc etc
Old network routers and modems are good which do not have a fixed home in rack so they end up on top of or under other boxes or just on the floor.
Probably best not to use live electrical sockets - a selection of power extension cables is needed.
Other unconnected electrical and telephone/modem sockets are optional.

Add in old household modems and TV/audio-visual and computer equipment of any sort.
You can also include kitchen appliances - anything with plug and cable.

Alternate location:

An area with a specific boundary - room or carpet or map (or tent?).

Alternate "equipment":

You can make pretend machines from cardboard boxes or other with ports for connecting rope cables. Get people to bring any WEEE(Waste Electrical and Electronic Equipment) and bring all to recycling centre after you are done.

Audit equipment and cables and floor space.

Label each cable end as A or B

Make a random choice generator for 1. items of equipment 2. cables and end A or B
Optional random generator for specific port in each equipment(optional) matching cable.

Play:

Run random choice generators.

You must take the item of equipment and plug specified cable end into a compatible port.
(into the specified port if playing that variant)

You may move the item of equipment (as long as some other item of equipment or cable doesn't fall or break).

You cannot stand or bash into cables or equipment.

As the game runs you cannot unplug items.
The room should get more difficult to navigate as game progresses.
It would be good to keep some sort of order so that clutter is not too bad but .. well .. see how it goes.
You could setup room at start with heavy equipment down middle or at sides e.g. real server racks or fridges/...

Decoration: disco balls, shiny blinky lights, ...

Have fun!

Empty server room racks
Empty server room racks


Network router on floor under debug console
Network router on floor under debug console

Debug console on pile of PCs
Debug console on pile of PCs

Further reading:

https://www.theregister.com/2016/01/22/cabling_horrors/

https://www.dreamstime.com/photos-images/messy-server-room.html


Monday 17 October 2022

lunchtime chat: refining knowledge on ocean tides - tidal ranges for Ireland and worldwide, tide timing pattern/periods and tidal bores on rivers.

Tidal ranges 

Ireland has pretty decent tidal range Dublin from 1m up to 5m (average 3m) tide-forecast.com/..Dublin-Ireland.. and Shannon marine.ie/../tidal-flows-around-ireland Shannon Estuary 4.5m-5.5m average range, average world tidal range is 0.6m open ocean.  wikipedia.org/..Tidal_range ../M2_tidal_ranges.jpg 

Thanks to wikipedia. Tidal ranges around the world. The M2 tidal constituent, peak amplitude indicated by color. White lines are cotidal lines spaced at phase intervals of 30° (a bit over 1 hr).[8] Amphidromic points are the dark blue areas where the lines come together.


Largest tidal ranges in world: 

#1 Bay of Fundy, Canada (16m average) 

#2 Severn Estuary, UK (15m average)

tides.today/../where-are-the-worlds-largest-tidal-ranges

noaa.gov/faq.html#08 Q: Where are the highest tides? list of locations

See also: https://www.weather.gov/jetstream/fundy_max Bay of Fundy: The Highest Tides in the World


Tidal patterns/periods

Tidal pattern/period is diurnal following Moon influence around alot of the world but water sloshes about giving other different tide periods (as well as tidal bores), e.g. look at chart of Kinvara in Galway bay: http://www.marine.ie/site-area/data-services/real-time-observations/tidal-observations-imos clickable chart for Ireland. 

Water Level, OD Malin (m)Observed16. Oct17. Oct-2.75-2.5-2.25-2Monday, Oct 17, 10:00-10:14







See world chart here Diurnal/Semidiurnal/other tidal phase patterns: http://canuck.seos.uvic.ca/SEOS/EOS110/tides/tides.html 



Tidal bores (on rivers mostly, and a bit on harbour/estuaries

Does every river have a tidal bore at some location ? Maybe minor ones. It is said that tidal bores are not that common around the world. About 100 rivers around the world have a tidal bore.

Tidal bores are pretty cool. They can be stronger on spring tides or if wind/weather conditions raise sea level at river mouth.  I understand they happen mostly on rivers with long slow mouth where river joins the sea https://education.nationalgeographic.org/resource/tidal-bore

The Bay of Fundy and Severn Estuary both have tidal bores.
https://ntslf.org/about-tides/tidal-river-bores The Severn, The Dee and the Mersey, the Qiantang (Hangzhou in China - largest tidal river bore in the world)

"Human activity can change or even remove tidal bores. A century ago, the Seine River in France had a strong tidal bore, called the mascaret. Years of river management (canalsdamsirrigation systems, dredging) eliminated the mascaret. Before the French began managing the Seine, the unpredictable mascaret was responsible for the loss of hundreds of ships. The wave would rush up the river, upsetting cargo ships and destroying docks."

Some significant tidal bores - some have names. https://en.wikipedia.org/wiki/Tidal_bore Info collected mostly from wikipedia there but filling in some extra info:

Tidal bores, Mascaret, Pororoca (1). Myths, Fables and Reality !!!
by Hubert CHANSON (h.chanson@uq.edu.au)

Tidal currents


Further reading - some cool reports on tidal energy

Tidal amplitude - environmental impacts of tidal power schemes


Catalog of Worldwide Tidal Bore Occurrences and Characteristics
 

Friday 14 October 2022

Route card for Kippure Hike - komoot app works nicely

You can use App like e.g. komoot.com to help draw route and fill in route card details.
komoot is the latest favourite as you can draw route on phone or at computer.
You can take distances travelled and height gain/loss from app.
App also helps estimate pace - komoot adjusts estimate depending on incline and track type and surface.
I have been doing a few route cards in google sheets.

Add a new tab duplicate of Blank Template when new route is to be done:
Anyone should be able to view that and make a copy for their own use.
Be careful if sharing - you don't leak your hike details to general public until after you do your hikes.
Access restricted but I can share it if you would like to see - just request access.

PROCEDURE: Duplicate route card Blank Template ...

0. fill in title, date, start time 1. Draw route in app and publish. 2. Fill in each waypoint description (following your route in app). 3. fill in Grid ref/lat long and Altiture and Total dist (use app) Optionally use irish.gridreferencefinder.com to fill in ITM grid refs 4. for each segment (view route and select segment can help) fill in Bearings, height climb/fall and incline, length 5. fill in route note e.g. "no path" "follow forest track then hill path" 6. Add up segment lengths and altitude gain/loss and check with total. 7. Fill in estimated time (time with no breaks) 8. add in break/lunch/view point/other stop times 9. Add in Escape notes. 9. Review card, verify distance, height gain/loss, surface and times. 

Break complicated legs into 2 or more by adding rows. 

Route can be shared first with other Scouters and with Scouts for planning.


Print to .pdf and share for non google sheet users.

https://drive.google.com/file/d/1r4q_XtAPxNcmxoSoyZgkX_pZ9Tr-MDOV/view?usp=sharing .pdf

 (access restricted but I can share no problem it after we have done hike - just request access)

e.g. also save .gpx and .kml files from App for load into other map apps and other uses:

https://drive.google.com/file/d/14QGkl4F2X8Nlt93fQa61HXUkrcAMjQTi/view?usp=sharing .gpx




Also, how to embed komoot route view in Google Doc.

Make a local .html file and paste in embed content. 

Open that local .html file in your browser (start with link file:///), select the embedded komoot, Copy and then Paste into google doc. 

embed map kippure komoot