nicwi - Slashdot User

Comment Re:5G frequencies (Score 3, Informative) 47

by nicwi on Sunday November 04, 2018 @04:25PM (#57590686) Attached to: Apple's First 5G iPhone Will Arrive In 2020, Says Report

Can someone comment on data throughput as a function of frequency. Do lower frequencies limit tower data rates?

There is more bandwidth available at the higher frequencies. More bandwidth allows for higher capacity.

Comment ABC80 (Score 1) 857

by nicwi on Sunday April 16, 2017 @03:49AM (#54243387) Attached to: Ask Slashdot: What Was Your First Home Computer?

A Z80-based computer with 16k RAM, builtin BASIC and 72x78 block graphics, developed by Swedish companies Dataindustrier and Luxor, back in 1978. Easily the most popular computer in Swedish homes and schools at that time. I added 16k memory, developed several games (yes, with 72x78 graphics), and some development tools (HJÄLPARE) that were spread through the Swedish community ABC-klubben, in an early open-source movement. Eventually me and a couple of friends developed a 240x240 pixel graphics extension that we tried to sell, without success. Very good learning project!

Submission + - SpaceX Test Fires First Raptor Engine (techcrunch.com)

Submitted by Thelasko on Monday September 26, 2016 @11:40AM

Thelasko writes: Elon Musk is preparing to unveil his plans to colonize Mars at IAC tomorrow. As a tease to his lecture, he has released some details about the Raptor engine on Twitter, including pictures.

Mr. Musk states that, "Production Raptor coal is specific impulse of 382 seconds and thrust of 3 MN (~310 metric tons) at 300 bar." He goes on to note that the specific impulse spec is at Mars ambient pressure.

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