A 1988 keynote by Gordon Bell on the history of personal workstations.
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@amoroso @weekend_editor very cool, I wonder if there are any infos/images of those machines with a color board & screen?
@symbolics I've never seen a screenshot of Interlisp-D in color. I'm not sure whether the color logo in this AAAI 82 photo is an actual monitor or just a sign.
https://interlisp.org/photos/AAAI82/AAAI82_9_hu_4a14d9fb5d0b6063.jpg
Gli ultimi otto messaggi ricevuti dalla Federazione
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@hipsterelectron I wonder how many CVEs have been filed against the CVE website
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OF COURSE THE CVE WEBSITE DOESN'T WORK ON FIREFOX
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why is it "oh grow up!" and not "get down on my hormonal level will you?"
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-il suo livello di napoletano?
-eccellente!
-allora mi traduca "sembra il mio amico proveniente dalla capitale francese"
-par is!
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Building a Hydraulic Gear Pump Isn’t So Easy
The gear pump prototype in action. (Credit: Artisan Makes, YouTube)
Hydraulic gear pumps are deceptively simple: just two gears rotating together, forcing the hydraulic oil from one side to the other where the teeth don’t meet, and thus providing the ability to pressurize said oil to make hydraulic cylinders, final drives, etc. do their thing. As with most machining projects like this, the devil is absolutely in the details, particularly in the tolerances. This is the crash course that the [Artisan Makes] channel on YouTube is currently going through.In this part one of a series on a DIY gear pump, scrap aluminium is used for the housing, along with 1045 medium carbon steel for the gears and W1A high carbon steel for bearings and other wear surfaces. Since at least one of the gears needs to be driven, a lip seal rated for 10 bar is used to provide a path for the shaft. As noted in the video, this is supposed to be a learning experience, ergo it’s a simplified design that merely targets being functional as a gear pump.
With the basic design figured out, the parts were created on the lathe and mill, followed by assembly. Most of the controversy is about the tolerances within the housing, as any leakage will reduce the efficiency. This means the spacing between the gears and housing, space between the gears and bearings, as well as that provided by the gasket that seals the housing base and top. This is where the comment section somewhat explodes with criticism and advice.
As can be seen in the demonstration with a better gasket, there is absolutely flow when driven at 1200 RPM, but also clearly severe leakage as evidenced by said flow not moving quite as fast as it should. We’re looking forward to the next part, in which addressing these tolerances is tackled, with hopefully a much more performant gear pump resulting.
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Che poi, spacciano per Made in Italy ciò che non lo è, ma il vero Made in Italy costa. Gli italiani, in massa, hanno perso la capacità di capire la qualità, quindi vanno di schifezze a prezzi bassissimi. Il Casentino ti dura una vita ma costa. Quando avranno capito che il low cost non esiste perché qualcuno il prezzo lo paga, la filiera italiana sarà morta e sepolta. Amen.
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@Linkshaender
che meraviglia!
buonanotte Armin 🌌
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frugando nella scatola dei ricordi 🐾«la Mimì col Trottola»
mag.1991
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Il 13 ottobre 1994 Netscape Communications annunciò che avrebbe reso gratuito, per uso non commerciale, il browser Netscape Navigator 1.0, poi rilasciato il 15 dicembre.
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1 ottobre 1954#accaddeoggiIBM annuncia il computer Modello 705, a valvole termoioniche e character-oriented (7 bit, parole da 35).
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29 settembre 1983#accaddeoggiLancio di Microsoft Word, sviluppato da Charles Simonyl e Richard Brodie, ex Xerox, assunti da Gates e Allen nel 1981.
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24 settembre 1986#accaddeoggiHoneywell, azienda attiva storicamente nel settore informatico, annunciò che stava iniziando colloqui per una possibile fusione delle sue attività informatiche con la giapponese NEC e la francese Groupe Bull.
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