I bumped into this a while ago, but since I’ve been doing quite a bit of research lately, it’s worth repeating.
–jeroen
Source: TwistedDoodles • The truth about Eureka. (I say bollocks… A lot!)
Archive for the ‘LifeHacker’ Category
TwistedDoodles • The truth about Eureka. (I say bollocks… A lot!)
Posted by jpluimers on 2018/08/30
Posted in Development, Fun, LifeHacker, Power User, science, Software Development | Leave a Comment »
If your mail auto-responder directs to a new email address, don’t have the new one also auto-respond
Posted by jpluimers on 2018/08/27
Base on the below (Dutch) tweet where an organisation had an auto-responder like this:
Thanks for your message. As of 20150701, we have a new email address: foo@example.org.
Did you use any of our old email addresses, then we forwarded it to the new one.
You will get a response to your e-mail within 5 working days.
Any mail to foo@example.org would get the same auto-response.
They should just leave out the first 2 sentences.
–jeroen
handig @zorgenzekerheid mail naar klantadvies.wlz@zorgenzekerheid.nl geeft reply “een nieuw e-mailadres: klantadvies.wlz@zorgenzekerheid.nl”
Share this:
Posted in LifeHacker, Power User | Leave a Comment »
Drone no-fly zones | ministerie van Infrastructuur en Milieu
Posted by jpluimers on 2018/08/20
If you ever want to fly a drone without a license in The Netherlands, be prepared that the flying zones are very limited, especially in : [Archive.is] Drone no-fly zones | ministerie van Infrastructuur en Milieu
The text isn’t very clear, even to Dutch people, so there is some discussion and explanation in these links:
- [WayBack] Tips voor de staatssecretaris voor veilig vliegen met drones in Nederland
- [WayBack] Drone Regels & Regelgeving Nederland 2017 | Online uitleg
- [WayBack] Ministerie geeft toelichting op regelgeving drones | Dronewatch
More temporary airspace restrictions are here:
–jeroen
Share this:
Posted in LifeHacker, Power User | Leave a Comment »
Ziggo – als je geen papieren factuur meer wilt
Posted by jpluimers on 2018/08/17
Als je bij Ziggo geen papieren factuur meer wilt, kun je dat op https://www.ziggo.nl/mijn-ziggo/gegevens/betalingsgegevens-wijzigen/ instellen.
–jeroen
via: [WayBack]
Share this:
Posted in LifeHacker, Power User | Leave a Comment »
Hack The Box :: Penetration Testing Labs
Posted by jpluimers on 2018/08/13
Cool playground:
An online platform to test and advance your skills in penetration testing and cyber security.
Via [WayBack] hackthebox – Penetration testing labs This is an amazing platform – super addictive! Hack The Box is an online platform al… – Jürgen Christoffel – Google+
–jeroen
Share this:
Posted in LifeHacker, Power User, Security | Leave a Comment »
Prepaid SIM cards for USA
Posted by jpluimers on 2018/08/06
This thread has some tips on pre-paid SIM cards for use in the USA: [WayBack] Telefonie en mobiel internet in de VS deel 2 – Pagina 9 – AllesAmerika.com Forum
This seems to be one of the few allowing for hotspot/tethering use: [WayBack] Arieli Mobile Unlimited + Tethering Data plan | Arieli Mobile – Prepaid USA SIM Card wireless provider
Via: [WayBack] T-Mobile vergroot databundels Travel & Surf-passen voor buiten EU – Tablets en telefoons – Nieuws – Tweakers
–jeroen
Share this:
Posted in LifeHacker, Power User | Leave a Comment »
Going to test some USB 3 gigabit ethernet adapters based on Realtek RTL8153 and Asix AX88179 chips
Posted by jpluimers on 2018/07/27
Later on, I might add a USB31000S in the mix, but I will do some initial testing with USB 3 gigabit ethernet adapters based on Realtek RTL8153 and Asix AX88179 chips.
Things I will focus on with my Retina MacBook Pro 2015 model are:
- CPU usage
- Throughput
- Duration between reconnect on USB after suspend, and renewing the DHCP lease
- Promiscuous mode capabilities
Some links for my references:
- [WayBack] The 8 Best USB to Ethernet Adapters of 2018 – FabatHome
- [WayBack] What USB to Ethernet Adapters to Buy And How Fast They Perform Based on Specs and Chipsets Used – GTrusted
- [WayBack] Any USB 3.0 Gigabit ethernet adapters that don’t require drivers? | MacRumors Forums
- [WayBack] Ethernet Adapter Compatablity – Raspberry Pi Forums
- [WayBack] Anatomy of a cheap USB to Ethernet adapter – Project Gus
- [Archive.is] nanog: Re: USB Ethernet Adapters
- [WayBack] nanog: Re: USB Ethernet Adapters
- [WayBack] USB to Ethernet Adapter and Promiscuous Mode – Wireshark Q&A
A first impression from the above links is that for Realtek chipset based devices, drivers are more readily included in operating systems, and these chipsets are better at VLAN handling.
–jeroen
Share this:
Posted in Ethernet, LifeHacker, Network-and-equipment, Power User, USB, USB, USB-C | Leave a Comment »
Hacking the Logitech C920 & C930e Webcams – Graves On SOHO Technology
Posted by jpluimers on 2018/07/20
via: [WayBack] Until recently I did not know that this was possible, but people are hacking the venerable Logitech C920 and C930e webcams. – Lars Fosdal – Google+
–jeroen
Some nice pictures of stereo camera configuration by Joe C Hecht at https://plus.google.com/+JeroenPluimers/posts/9T8u82E8rH2
Share this:
Posted in Development, Hardware Development, LifeHacker, Power User | Leave a Comment »
Generating a million sequential numbers on the fly in a Firebird query – some solutions and speed measurements
Posted by jpluimers on 2018/07/19
The testing was done with Firebird 2.5.x x86 on Windows 7 x64.
Where other relational database platforms have plenty of opportunities to generate sequences (see for instance the below links on Oracle and SQL Server), with Firebird you can use a WITH RECURSIVE query construct that normally is being used to manage tree structures ([WayBack] PkLab – Firebird: Tree data mangement with recursive CTE).
However, that uses query stack which has a depth limit of 1024 levels. When you reach the limit, Firebird gives you an error like this:
with
recursive
sequence(n) as (
-- When you select more than 1024 values, this error occurs:
-- Error while fetching data: Too many concurrent executions of the same request
select 0 -- start
from rdb$database
union all
select sequence.n + 1
from sequence
where sequence.n < 1023 -- finish
)
select sequence.n
from sequence
--where sequence.n in (24, 38)
order by sequence.n
It however is a pretty quick and CU bound solution: on my system ([WayBack] AMD A8-7600 @ 3.1 Ghz), it runs 1000 records within ~0.1 seconds.
In such a short time, it’s hard to see how the speed is bound, so I wanted to go for some orders of magnitude more. In ~0.1 seconds, the processor executes about 0.3 * 10^9 cycles generating 1000 numbers which is ~ 300-thousand cycles per number. That sounds like a lot of cycles for so few numbers. Would this become a better ratio for more numbers?
Share this:
Posted in Database Development, Development, Firebird, IKEA hacks, OracleDB, SQL, SQL Server | Leave a Comment »
Ian’s Shoelace Site – Shoelace Knots – How To Tie Your Shoes
Posted by jpluimers on 2018/07/13
I never knew there were so many ways of lacing your shoes: [WayBack] Ian’s Shoelace Site – Shoelace Knots – How To Tie Your Shoes
Finally research has shown how they can get loose soo fast: [WayBack] Scientists unravel mystery of the loose shoelace | Science | The Guardian
via: [WayBack] Unravelling [yes, pun intended] the mysteries of the unknotting shoelace. – Lars Fosdal – Google+
–jeroen
Interesting app (knots 3d) and comments at https://plus.google.com/+JeroenPluimers/posts/Nv7teC8CUqY
Share this:
Posted in LifeHacker, Power User | Leave a Comment »
The Wiert Corner - irregular stream of stuff 