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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for November 30th, 2020

Keep alive SSH connection with server in MacOs Mojave – Ask Different

Posted by jpluimers on 2020/11/30

Reminder to self: check if this has been worked-around yet: [WayBack] Keep alive SSH connection with server in MacOs Mojave – Ask Different

In El Captain, to maintain active a SSH connection you should edit ~/.ssh/config file to add your additional rules.

nano ~/.ssh/config

To maintain active for 1 hour you should add:

Host *
   ServerAliveInterval 3600

I cannot recreate the same situation is MacOS Mojave, it continue to close connections after some minutes. Any suggestions about this?

Via: [WayBack] Ask Different on Twitter: “Can you answer this? Keep alive SSH connection with server in MacOs Mojave #ssh”

–jeroen

 

Posted in Apple, Mac OS X / OS X / MacOS, Power User | Leave a Comment »

NOx value measurement is an indicator for much wider forms of pollution (was: Definitiv ein lesenswerter Artikel, trotz der plakativen Schlagzeile)

Posted by jpluimers on 2020/11/30

Basically:

In other words (and she’ll say that later in an interview): It’s not the NO2 limit we’re talking about here, it’s all the air pollutants we inhale day after day. The discussion about diesel bans and the reduction of NO2 emissions misses the real problem, because if only the NO2 is reduced and not the other pollutants, that does not help much.

Google translated from:

Mit anderen Worten (und das sagt sie auch noch später in Interview): Es ist gar nicht der NO2-Grenzwert, um den es hier geht, es sind die gesamten Luftschadstoffe, die wir Tag für Tag einatmen. Die Diskussion um Dieselfahrverbote und Reduzierung des NO2-Ausstoßes geht am eigentlichen Problem vorbei, denn wenn nur das NO2 reduziert wird und nicht die weiteren Schadstoffe, hilft das nicht viel.

[WayBack] Definitiv ein lesenswerter Artikel, trotz der plakativen Schlagzeile: > Es geht bei dem Grenzwert nicht nur um die Gesundheitswirkung des Reizgases NO2… – Thomas Mueller (dummzeuch) – Google+

–jeroen

Posted in About, History | Leave a Comment »

Android: measuring sound levels

Posted by jpluimers on 2020/11/30

Two Android apps I tried that work quite OK for measuring dBA or Sound Pressure Level:

Measuring sound levels is not easy, especially the calibration is important. That’s why professional devices are relatively expensive.

These are no full replacements for those professional devices, but the first comes close enough for me.

–jeroen

Posted in Android Devices, LifeHacker, Power User | Leave a Comment »