Since DOS is a command line type of operating system, it is really important that you understand the syntax of commands. The good news is that the system will do what you tell it to do. But the bad news is that it will do what you tell it to do. You have to tell it in the precisely correct way, and that means Syntax. And with a number of commands you can modify them using Switches. And where do you learn all about Syntax and Switches? Why, in the HELP system, of course!

Links:

https://www.ahuka.com/dos-lessons-for-self-study-purposes/dos-lesson-6-syntax-and-switches-help-system/

In this episode, the Inlaws are hosting Neil Johnson, VP of Engineering at Element. But this is

not just about this popular Matrix graphical user interface but rather about this federated communication

network dubbed as the next big thing after Mastodon and Discord, soon to take over the world (pretty

much like the Inlaws themselves - it's gonna get crowded... :-).

Links:

The Matrix Foundation: https://matrix.org/foundation

Element: https://github.com/vector-im/element-web

Synapse (Matrix reference implementation in Python): https://github.com/matrix-org/synapse

Dendrite (Matrix implementation in Gloang): https://github.com/matrix-org/dendrite

Conduit (Matrix implementation in Rust): https://github.com/timokoesters/conduit

EU interoperability: https://ec.europa.eu/isa2/sites/default/files/eif_brochure_final.pdf

Terry Pratchett: https://en.wikipedia.org/wiki/Terry_Pratchett#Works

This episode covers some of the differences between C# and Haskell. I'm probably going to omit lot of things accidentally.

Origin: practical language for solving real world problems vs. programming language research

Main paradigm: object oriented vs purely functional

Changing data: mutability vs. immutability

Data structures: inheritance vs. composition

Execution model: strict vs. nonstrict

Side effects: anywhere vs. specifically marked areas in the code

Thanks for listening, if you have any questions or comments, you can reach me via email or in fediverse, where I'm [email protected]. Or even better, you could record your own hacker public radio episode.

Partial list of albums

Journey - Frontiers

Journey - Evolution

Journey - Greatest Hits

Journey - Departure

Chicago - 2 albums - unknown titles

John Denver - Rocky Mountain Christmas

Inside Star Trek (1976)

SIDE I Inside Star Trek Star Trek Theme William Shatner Meets Captain Kirk The Origin of Spock Sarek's Son Spock The Questor Affair

SIDE II The Enterprise Runs Aground McCoy's Rx for Life The Star Trek Philosophy Asimov's World of Science Fiction A Letter From a Network Censor The Star Trek Dream Ballad I/Ballad II)*

Inside Star Trek album: Cover

Click the

thumbnail to see the full-sized image - -

Inside Star Trek album: Contents

Click the thumbnail to see the full-sized image - -

I found a turntable at the thrift store, and the spindle ran, but the platter did not. The belt had slipped off, and here is the fix.

https://www.youtube.com/watch?app=desktop&v=rXkOoaIVsvE

How to remove platter

Click the thumbnail to see the full-sized image - -

Belt placement

Click the thumbnail to see the full-sized image - -

Routing Audio from a USB Turntable to HDMI using a Raspberry Pi

https://www.rickmakes.com/routing-audVmmsio-from-a-usb-turntable-to-hdmi-using-a-raspberry-pi

Send input to output

alsaloop -t 500000 -C hw:CARD=CODEC,DEV=0 -P default:CARD=b1

alsaloop man page

https://linux.die.net/man/1/alsaloop

-t | --tlatency= Requested latency in usec (1/1000000sec).

Parameter b1 is found by

pi@retropie:~ $ aplay -l

**** List of PLAYBACK Hardware Devices ****

card 0: b1 [bcm2835 HDMI 1], device 0: bcm2835 HDMI 1 [bcm2835 HDMI 1]

Raspberry Pi as a USB audio capture device

https://scruss.com/blog/2012/11/20/raspberry-pi-as-a-usb-audio-capture-device

arecord -D 'pulse' -V stereo -c 2 -f dat -d 900 out.wav

arecord -D 'hw:CARD=CODEC,DEV=0' -V stereo -c 2 -f dat -d 900 out.wav

Used hw:CARD=CODEC,DEV=0 derived from 'arecord -L'

hw:CARD=CODEC,DEV=0

USB Audio CODEC, USB Audio

Direct hardware device without any conversions

arecord man page

htt

Upload today!

https://hackerpublicradio.org/calendar.php

RULES:

only new host or existing host interviewing a 3rd party

I pick the winner

don't abuse the system to win the prize ;P

HAM Radio Organizations

The HAM Page of the Swiss Federal Office of Communications, BAKOM: https://www.bakom.admin.ch/bakom/de/home/frequenzen-antennen/frequenznutzung-mit-oder-ohne-konzessionen/amateurfunk.html

Union of Swiss Short Wave Amateurs, they manage the local associations and the use of the frequencies for relays and automated stations: https://www.uska.ch/en/

Training

Most likely the best way to prepare for the exam is attending a preparation course from a local Association, of have a brother who did and forwarded all the background info and documents to me. ;) But apart from having a brother I did the following:

The online version of the books I read: https://www.darc.de/der-club/referate/ajw/darc-online-lehrgang/ - again in German. They're mainly geared towards the German exams but the knowledge contained is useful for the Swiss exams, too.

I mainly used the HamRadioTrainer to prepare for the exam. This is a Windows application which however works pretty well in wine. I was told that the Swiss questions are rather old, 2017ish.

I was told that there are mobile apps with more recent questions but I couldn't be bothered to check whether they exist on F-Droid.

The BAKOM also has a site about the exams, containing PDFs with example questions, of course again everything in German: https://www.bakom.admin.ch/bakom/de/home/frequenzen-antennen/funkerpruefungen/amateurfunk-pruefungen.html

Overview

On Christmas Day 2021 at 12:20 UTC the James Webb Space Telescope was launched. This is the largest telescope ever sent into space and the project has been delayed for many years. The entire astronomical community was very nervous about the launch and about the phase that will follow as the telescope is set up for use.

Andrew Conway was previously a professional Astronomer, and Dave is very interested in the subject as an amateur. They got together on Mumble to witness the launch, and the dialogue was recorded and is presented here.

The JWST

Quote from Wikipedia (a page that is being updated as the project proceeds):

The James Webb Space Telescope (JWST) is a space telescope developed by NASA with contributions from the European Space Agency (ESA), and the Canadian Space Agency (CSA). The telescope is named after James E. Webb, who was the administrator of NASA from 1961 to 1968 and played an integral role in the Apollo program. It is intended to succeed the Hubble Space Telescope as NASA’s flagship mission in astrophysics. JWST was launched 25 December 2021 on Ariane flight VA256. It is designed to provide improved infrared resolution and sensitivity over Hubble, and will enable a broad range of investigations across the fields of astronomy and cosmology, including observations of some of the most distant events and objects in the Universe such as the formation of the first galaxies, and allowing detailed atmospheric characterization of potentially habitable exoplanets.

JWST’s primary mirror, the Optical Telescope Element, consists of 18 hexagonal mirror segments made of gold-plated beryllium which combine to create a 6.5 meter (21 ft 4 inch) diameter mirror – considerably larger than Hubble’s 2.4 m (7.9 ft) mirror. Unlike Hubble, which observes in the near ultraviolet, visible, and near infrared (0.1–1.0 μm) spectra, JWST will observe in a lower frequency range, from long-wavelength visible light (red) through mid-infrared (0.6–28.3 μm). This will enable it to observe high-redshift objects that are too old and too distant for Hubble. The telescope must be kept very cold to observe in the infrared without interference, so it will be deployed in space near the Sun–Earth L2 Lagrange point, about 1.5 million kilometers (930,000 mi) from Earth. A large sunshield made of silicon- and aluminum-coated Kapton will keep its mirror and instruments below 50 K (−223 °C; −370 °F).

The NASA Goddard Space Flight Center (GSFC) in Maryland managed the development and the Space Telescope Science Institute is operating JWST. The prime contractor was Northrop Grumman.

Development began in 1996 for a launch that was initially planned for 2007 with a US$500 million budget. There were many delays and cost overruns, including a major redesign in 2005, a ripped sunshield during a practice deployment, a recommendation from an independent review board, the COVID-19 pandemic, issues with the Ariane 5 rocket and the telescope itself, and communications issues between the telescope and the launch vehicle. Concerns among the involved scientists and engineers about the launch and deployment of the telescope have been well-described.

Construction was completed in late 2016, when an extensive testing phase began. JWST was launched 12:20 UTC 25 December 2021 by an Ariane 5 launch vehicle from Kourou, French Guiana and was released from the upper stage 27 minutes later. The telescope was confirmed to be receiving power, and as of December 2021 is traveling to its target destination.

The complete shownotes are available in our mumble how-to.

When using Mumble you should always use a microphone and headset positioned close to your mouth but slightly off to the side.

The Mumble website offers download and install instructions for different operating systems.

Once you have installed the client then connect to the HPR Room on Mumble.

There is a first run wizard that will step you through the process of configuring Mumble the first time. This will open up a series of configuration options.

It is very important that you set Push to Talk (PTT) and you Disable Text-To-Speech, as you will disturb the other people in the room if you select the other methods. It may seem to be working fine to you, but it will result in issues for the others.

You are expected to have a digital certificate when connecting to Mumble servers. An automatically created one is usually fine.

Once you have the Mumble client set up we can now start the process of connecting to the HPR Room on Mumble.

If at any time you need to add the HPR server open mumble and press Server - Connect, press Add New...and enter the following information for the HPR server:

Address: chatter.skyehaven.net

Port: 64738

Username: Your Username

Label: chatter.skyehaven.net

Think about your username a bit as if you register it on the server you will not be able to change it again.

Before connecting to any room it's good etiquette to make sure your audio is working correctly. The room Audio Test will allow you to speak and the OpieTheRepeatherBot will record your speech and after 10 seconds will play it back for you.

Hi to all HPR listeners this is a short show just to say Hi and a happy New Year to those in HPR land I may not have talked to over the Mumble marathon (and that is most of you). My main news is my new Juno PC which I got just before Christmas and It is a massive upgrade for me from my old Gen 3 i7 PC I was using. In real world tests it is about 5 times faster than my old PC and editing Audio and images is a breeze. I got the Brutus 5000 with a Ryzen 9 5900 CPU 32Gb RAM and a 1TB Nvme SSD. It came pre loaded with Ubuntu 20.04 but I installed Linux Mint 20.2 and after getting the details of the PPA for the Juno Drivers everything is working fine. Ports wise for a tiny PC it is OK but I have added a USB 3 powered Hub with 4 extra ports and in the new year will get one with a few more to help me tidy up the wiring snakes on the desk.

For some reason it no longer sees any bootable USB drives at boot after pressing of the boot menu key so a bit of investigation is needed to get that to work again, but on the whole I am a happy camper.

Well that's me for this show short as it was if you want more of my ramblings along with my fellow hosts Moss and Dale pop over to Distrohoppers' Digest and see what we have been up to, we record a new show about once a month.

https://junocomputers.com/product/brutus-5000/

https://distrohoppersdigest.blogspot.com/

table td.shrink {

white-space:nowrap

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New hosts

Welcome to our new host:

Mechatroniac.

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