614 karma · joined June 26, 2013
> However, a key drawback of this “power-to-gas-to-power” route, if electrolysis is used for hydrogen production, is the round-trip efficiency, which is “around 45%,” it says. The report provides an example to illustrate the cost penalty per MWh associated with the power-to-gas-to-power route: “Hydrogen generation from low-cost renewables at $25/MWh with a capacity factor of 50% yields a cost of $1.70/kg of hydrogen produced. Storing this hydrogen underground will add about another $0.30/kg, thus the hydrogen costs $2/kg. If this hydrogen is used to generate power, the resulting cost is $100 to $200/MWh. In ideal conditions (e.g. a CCGT turbine at 60% utilisation), the cost is $100/MWh, while simple-cycle turbines at 25% utilisation would deliver power at $200/MWh.”
> Still, the report is optimistic. Because hydrogen production costs will drive up to 80% of total power generation costs (Figure 3), if the technical feasibility of a 100% hydrogen turbine is proven, the capital expense of hydrogen turbines could “rival that of natural gas turbines by 2030,” it says. For now, however, “companies should use hydrogen-based power for high-value flexible generation first, and two, hydrogen baseload power generation for deep decarbonisation in situations with constrained renewables potential will require strong policy support.”
New Firefox: (go to settings to enable non-default search engines to be displayed) Best case: tap the address bar, enter your search term, press return or one of the non-default search engines and then return.
The problem is that after adding a custom search engine, it ends up at the bottom of the list, meaning that in order to select it after typing my search terms, I have to scroll down, causing the keyboard to collapse. After selecting the right search engine firefox doesn't search automatically but rather I have to tap the address bar again and then press return. So, where in the past I had a "tap, type, tap, (search results)" experience, now it is "tap, type, scroll, tap (bottom of screen to select SE), tap (top of screen into the address bar to get the keyboard back), tap (bottom of screen [return key on keyboard]), search results"
I very much would like to go back to the old behavior.
Now I'm wondering whether I'm mistaken? If my connection to a website/device is properly encrypted (SSL/TLS), can a mitm attack (eg by an embedded hw bug) strip that encryption away? If so, that would be bad and would invalidate large parts of my argument above. If it doesn't however, then it wouldn't really matter that much I think. Unless... the device somehow saves a copy of the traffic for later decryption with better hardware down the line. That seems doable but not really feasible at scale. (Then again, maybe a few bugs in the routers installed at a few critical facilities or locations like downtown DC are enough to gobble up enough juicy traffic?)
I think on the whole it was a bad idea to offshore virtually all production capabilities for chips and computer hardware. (This is especially true for Europe which lost its hw production to Asia and its software production to the US.) Now we have to cope with this situation as it is though, and it seems to me that the best way to do that is to improve transparency by doing what I wrote above, radically reducing complexity of protocols and the tech stack (eg openssl vs wireguard) and forcing companies to clean up their act wrt IT practices. Not easy at all, I know.
The solution to all of this is to work together and increase the security of the overall system and ditch security through obscurity and security through NDA, go open-source and full inspectability for all critical infrastructure, be it comms, industrial controls, medical infrastructure, transport etc. And E2E encrypt all communications. Everything else is just screwing around with the symptoms instead of addressing the root causes.