@robertosfield.bsky.social
Project lead of open source VulkanSceneGraph and OpenSceneGraph projects, software consultant, runner, tech transition tracker and family man.
JOB ALERT! 🦜🔭🌿
Are you passionate about #Birds, #Ecology, #Fieldwork, #Research?
The University of Salford is looking for a #ResearchTechnician to assist with ecological monitoring of #Ringneckedparakeets in Manchester, UK.
More info & how to apply 👇
Hurry! Closes 15 Dec
@salforduni.bsky.social
Do you know where it stands w.r.rt UK sales?
05.12.2025 22:20 — 👍 0 🔁 0 💬 0 📌 0
While the new Renault 5 is lovely and no doubt selling well it sadly isn't in the the top 10.
www.smmt.co.uk/vehicle-data...
Despite growth in BEVs Tesla shrank 5.91% year on year, increasing competition in the BEV space and folks being sick of Elon Musks conduct both having an effect.
Toyota fared even worse down 9.87%, despite HEV and PHEV segments growing. Once a leader in electrification of cars is being left out.
BEV, PHEV and HEV segments all grew year on year, while both Petrol and Diesel continue to shrink.
04.12.2025 10:45 — 👍 1 🔁 0 💬 1 📌 0
@smmtgroup.bsky.social have published their UK new car registration data for November and while BEVs only grew 3.6% year on year they did this despite the overall market shrinking 1.6% and remains on track for 50% share around mid 2027.
04.12.2025 10:38 — 👍 1 🔁 1 💬 1 📌 0Have you been able to improve the recharge rate of your battery?
03.12.2025 13:01 — 👍 0 🔁 0 💬 1 📌 0The app won't add any finer control just more convenience.
Reducing hysteresis will help kick in a recharge of the cylinder, but will lower efficiency as it'll be reheating from a higher temperature.
As you have a household battery the need to run low tariff period is lower.
Indeed you can, but it still take a while to get the hot water temperature back up so it's not something we do more than a couple of times year.
In the middle of winter when the heating is on when you switch on heating the cylinder you stop heating the house so best timed when you don't need heat.
We have 4 adults in the house right now so if 3 of us want to have a shower in quick succession then we can run out.
However, most of the year round we rarely run out. Increasing the cyclinder target temperature can help provide more hot water, but at the expense of efficiency.
We set up our recharge periods via our MyVaillant phone app so that it either runs during the 0:30 to 5:30 overnight Octopus Go low tariff period or during the day between 8:00 and 16:00.
If the hot water runs out outside of these periods it remains cold till the next recharge period.
Well at least they got the title subheading right...
"Despite generous subsidies, electrolyser numbers fall short of targets by a factor of 20"
Graphics Programming weekly - Issue 418 - November 30th, 2025 www.jendrikillner.com/post/graphic...
02.12.2025 14:00 — 👍 62 🔁 20 💬 0 📌 0Perhaps I'm looking at different figures but 308MW installed capacity vs 6GW target is 5%, rather than 0.5%.
Still a pitiful achievement. Goodness knows why some politicians remain committed to the delusion of a "hydrogen economy."
ImPlot 0.17 + ImPlot3D 0.30 released:
- github.com/epezent/impl...
- github.com/brenocq/impl...
brenocq (Breno Cunha Queiroz) main author of ImPlot3D took over maintenance of ImPlot, you can sponsor him at: github.com/sponsors/bre...
From Copernicus: This shows how the expected date for breaching 1.5C has been creeping ever closer in recent years. The orange date shows the baseline for the extrapolation; the red date shows when 1.5C is breached based on the trend...
30.11.2025 18:34 — 👍 155 🔁 78 💬 10 📌 7Five class of wild animals I've seen within 500 metres of my front door:
Birds of Prey: Sea Eagle, Buzzard, Red Kite, Sparrow hawk, Grey Herron
Small birds: Kingfisher, Swift, Swallow, Goldeneye
Mammals: Red squirrel, Red fox, Roe deer (evidence of Beaver)
Amphibians: Common Frog
Bats: Pipistrelle
I have tagged developer release for the VulkanSceneGraph, vsgXchange and vsgExamples projects. Big additions are new MipmapLayout class and ktx2 & basisu support, with libktx now being pulled in as an external dependency.
Further details on the VulkanSceneGraph forum:
github.com/vsg-dev/Vulk...
It's not long ago that most of us never even asked the question where the rubber on our tyres went when we realise we have to replace the worn ones. The obvious answer is: directly into nature.
New report shows that car tyres are the largest source of microplastics in Norway's natural environment.
Improved mental and physical health leads ton higher personal productivity in working and home life.
Higher productivity at work makes businesses and institutions we rely upon more profitable and functional.
Higher profits leads to more taxes and better international trade balances.
Good to see impact of EV adoption improving quality of life beyond those who drive the EVs, the whole of society benefits from lower noise and pollution.
Less noise leads to less stressful urban environments, which in turn leads to improved sleep which improves mental and physical health.
New blog post.
Real World UK Winter Heat Pump COP Performance
Highlighting that heat pump performance is not linear against the outside temperature with real data from my 5kW @vaillantuk.bsky.social Arotherm.
Hope this one is useful.
energy-stats.uk/uk-winter-he...
Funding: if your mid/large business uses Dear ImGui - and maybe you are approaching end of year budget/planning etc. - please consider reaching out (PM/email) so I can help you help Dear ImGui !
05.11.2025 20:00 — 👍 95 🔁 50 💬 0 📌 2Those of us who transitioned our households and businesses away from Fossil fuels can provide good examples of how it can work, and help build a Road Map for those left to transition.
24.11.2025 10:50 — 👍 0 🔁 0 💬 0 📌 0It could be by the end of the 2020's we'll look back on 2025 being peak Coal, peak Oil and peak Gas.
We all need to work to make this happen through education & action.
Those still using Fossil fuels need to look to efficiency gains to reduce their use, and to plan transition away from them.
Fossil CO2 emissions are still growing in 2025 which is deeply unhealthy for the planet. There are signs that 2026 could see humanity finally turn the corner. Look at the trajectory for Coal, Oil and Gas.
If we can achieve the same reduction in growth 2024 to 2025, it'll turn negative in 2026.
Most appliances on their own are under 3kW but if they are used at the same time do occassional go over. The grid fills the gap when we exceed the 3kW so not ideal cost wise but everything just works.
If we were attempting to work off grid the 3kW inverter would be way too small.
Go back and look at the diagram, it uses 0.3kW elec. input for 1.0kW of output, which is... an COP of 3.33.
We have had a heat-pump for past year and have averaged a COP of 3.84. This is nothing exceptional for modern heat-pumps, the 3.33 figure used is lower than an be expected for modern units.
Our old gas boiler, with an efficiency of 75%, an Gas CO2 intensity of 240g/kWh (taking into account Fugitive emissions) we get 320gCO2/kWh for heating.
14g vs 320g of CO2 per kWh of heating.
Our heat-pump usage has just 4.4% of the CO2 emissions of the Gas boiler it replaced.
Our heat-pump isn't just 5 times as efficient, it's also running of a largely de-carbonized grid.
Taking data from electricityinfo.org for the North Scotland and weighting for our monthly heat-pump elec. we get an average grid intensity of 53gCO2/kWh.
Equates to an average 14gCO2/kWh for heating.
