#solar #energy #pricing record in January 02020 in #Qatar was US$15.67 per megawatt hour (US$0.01567/kWh) with a 25-year PPA for 800 MW #photovoltaic
Electrical #energy #pricing in the #USA in 02019 for new PPAs averaged US$27.40 per megawatt hour, down 4.7% from 02018, including non-renewables. #Solar, nearly all #photovoltaic, dropped slightly, wind rose slightly. #Google was the biggest buyer globally.
#Solar #energy #pricing in the #USA southwest is killing coal plants; the coal-fired San Juan Generating Plant in New Mexico costs US$44.90/MWh (cost of production), triple “the just-approved solar PPA” at US$15/MWh for 100 MW; the Palo Verde trading hub price averaged US$26.58/MWh in 02019.
in August, 02019, analyst Tom Heggarty speculates that recent low #photovoltaic PPAs like Portugal’s US$16.48/MWh #pricing represent not the true LCoe but a bet that the market value of the #solar plant in 15 years will be substantially higher than it is today, because the market price of electrical #energy is, like, US$34/MWh or US$56/MWh: after the PPA is over they can sell on the spot market. VP of Development at Scale Microgrids @duncan__c agreed on Twitter, and BNEF analys Jenny Chase also confirmed that “seemingly negative NPV PPA bids” are now common
Tableau data explorer of #USA #solar PPA #pricing (mostly #photovoltaic) historical data since 2006
#language similar to expsystem by Tesler from 1968
#PDF #paper by Tesler from 1968 about a #language similar to expsystem
overview of the #STM32 F4 series and the "Black Pill" boards with them
"LiteBSD" is a port of 4.4 #BSD to the PIC32MZ #ARM #microcontroller, which has a paging MMU and half a mebibyte of RAM.
This guy got 2.11 #BSD running on a #PDP-11 #emulation on an #ESP32 #microcontroller.
The #PDP-11 #emulation for an #ESP32 #microcontroller #hardware with a 3-D printed VT102 that can run #BSD.
a 960×540 #eink #hardware kit for US$69 with an #ESP32 #microcontroller in it and a two-point touchscreen.
#Wuhan #COVID #history footage from January 02020, when they were first realizing that it was a big deal.
Time Magazine's initial #COVID #history article: ‘This “does not rule out the possibility of limited human-to-human transmission, but the risk of continuous human-to-human transmission is low,” Li said. “With the implementation of our various prevention and control measures, the epidemic can be prevented and controlled.”’
The Russian #math #pedagogy magazine Quantum was translated into English for several years, 01990 to 02001, and is available as #PDF #ebook files.
Peer review rejection of classic #object-capability #security paper “Capability Myths Demolished”
how to make your #Matrix server invite-only
The Long #COVID paper from the #UK ONS with truly staggering rates of new diabetes and cardiovascular disease among survivors, even those who were not hospitalized
oh hey a US$4 #Raspberry-Pi #microcontroller "RP2040" with device and host USB and 264 KiB RAM. The 8-threaded “pioasm” coprocessor for hardware control things like WS2812 interfacing sounds pretty interesting (32 instructions per PIO program, an assembly language with 9 instructions), with a Python implementation using a function decorator ☺
review of J. Storrs “Utility Fog” Hall’s “Where is my Flying Car?” #futurism #predictions
Crockford’s explanation of the Pratt #top-down-operator-precedence #parsing algorithm; Crockford presents a #JS parser that can parse the JS subset it’s written in, cut down from his JSlint. #algorithms #smallisbeautiful
Fredrik Lundh’s explanation of Pratt’s #top-down-operator-precedence #parsing algorithm in Python. #algorithms
Eli Bendersky’s article on Pratt’s #top-down-operator-precedence #parsing algorithm, using as an example infix arithmetic with parentheses in Python. #algorithms