Viewing profile — daddylonglegs

Active sonar has been back in use for searching for submarines for a few decades now, the article is out of date. Low frequency active sonar towed sonars are fitted to modern subma…

IIRC very few public transport systems make a profit on running costs - never mind capital costs. The rest operate as money pits. Useful systems have huge positive externalities th…

I think that - in theory - each case is unique and was individually tested at a trial where the evidence was weighed and judgement delivered. For each case lawyers need to prepare …

As I recall, Computer Weekly and Private Eye have been reporting this for over a decade. This is the second major scandal in recent decades where Computer Weekly , a trade rag, hav…

Thank you for id'ing the module. I can now see how using this would work for Facebook's needs. I think the XC7A100T is supported by the free (and limited) edition of Vivado [1]. Of…

Thank you, I will put a query on Github. However, I think they've used code from NetTimeLogic under a licence [1][2] that precludes distributing the source: > 3.2 Distribution Righ…

I cannot find any source files for the FPGA code in the repository (no .v .vhd .vhdl files and I can't see anything by looking around manually). The FPGA directory [1] contains som…

> So GPS doesn’t exactly need leap seconds but it really does care about how long a rotation of the earth takes which… amounts to the same thing. I don't think this is right. GPS e…

50 years was my (over optimistic) estimate of how long the CO2 would be left in the atmosphere before being sequestered by one of the carbon removal technologies being touted. In r…

Surely dissolving CO2 in the ocean acts as a buffer, not a sink? We will have to stop emitting all of that CO2 as well (and future generations will have to sequester it). The net a…

Most types of carbon capture technology [1] being touted are credit cards for climate change: You burn enough fuel to generate 4MJ worth of heat... Your internal combustion engine …

Much of the corn is being grown in a way that erodes the soil and depletes the water reserves being used, compromising our ability to grow crops in those areas in the future. Someo…

Yes, they reduce with hydrogen and then feed the sponge iron into an electric arc furnace: https://www.hybritdevelopment.com/articles/three-hybrit-pilo...

The abstract [1] states that the technique is "purely material-enabled" but that they still laid out their kinetic inductor in a spiral. It would seem to me that a big advantage fo…