dinsdag, juni 11, 2019

Zwerm scheppen (catching a swarm)

(English below)
2de pinksterdag. Appje in de imker-app-groep: iemand heeft een bijenzwerm in Deventer gemeld. Welke imker kan/wil gaan kijken? Ik wilde het wel een keer proberen, maar had nog nooit een zwerm 'geschept', zoals ze dat noemen. En ik moet vanuit Rijssen ca 25km rijden: hangt die zwerm er nog als ik aan kom?

Ik kleed me om en grijp mijn spullen bij elkaar (bak om de bijen in te kunnen stoppen, bijen-kap, handschoenen, lange broek, lange mouwen, een ganzenveer en veger om de bijen van plekken af te kunnen vegen, plantenspuit (een zwerm nat-nevelen maakt dat ze meer op 1 bol blijven zitten en minder opvliegen...)).

In Deventer aangekomen blijkt de zwerm op ca 3 meter hoog in een boom in een straat te hangen. Sympathieke buurtbewoners wachten me al op en hebben een trap. Ik zie een flinke tros bijen in de boom hangen. Best spannend, en je hoopt maar dat je niet iets stoms doet en 'af gaat' terwijl die mensen kijken: jij bent toch 'de imker'.

Hieronder wat foto's. Ik ben een keer of 7 omhoog geklommen. Minimaal 4 keer gestoken (in kin, vinger en arm). Maar de dames zaten die avond in Rijssen in een nieuw huis. Nu kijken of het ze bevalt en ze blijven.

Een beeldverslag (met dank aan de fotograaf, een buurtbewoner):

De zwerm terwijl ze net deze boom hebben gekozen en een tros aan het vormen zijn (toen was ik er nog niet bij)
Spullen klaar zetten:
Zo dicht mogelijk bij de zwerm komen met je bak (bij de linker bovenkant van de bak zie je een stuk van de tros):

woensdag, april 10, 2019

Pair Google Home (mini) with Harman Kardon Invoke

So we have this Harman Kardon Invoke, a smart speaker with Microsoft Cortana. For me as a non-US-user, it's a rather limited device. So trying to find the best use, i wondered if i could pair the Invoke with a Google Home via Bluetooth (BT), as to use the Invoke as BT-speaker.

I did find instructions of how to pair the Google Home mini to a BT-speaker, but the Google Home app seems to have evolved since that documentation was, so here i document how to pair a BT speaker:

  • open your Google Home app

zaterdag, januari 19, 2019

Agapornis babies



So we had this Agapornis. We like to give our birds the possibility to fly around our living room. We thought it would be nice to buy the bird a pal, a friend. This turned out to make it a couple (with these birds it is hard to tell whether they are male or female).

Before we knew it, one started typical behaviour of trying to collect nesting material. Which means they'll try to find stems from plants and flowers to rip them apart into fibers. So after some plants were demolished before we knew what was going on, we basically stopped buying new plants. After that, the female turned to ripping paper. It's funny to see they put the material between their feathers to transport it to their nest, often loosing most of what they collected.

zaterdag, december 29, 2018

Data Science at the Command Line

At SURF i had the chance to attend a course 'data science at the command line'. Jeroen Janssens from Data Science Workshops B.V.  showed the attendees in a hands on workshop what you can do from the command line. The great thing: he recorded all commands, so you can play them back if you want to :-). The file with the commands can be found here.

The accompanying sheets, which also includes the Docker container you can download to execute the commands in, can be found here, but for your convenience, from the command line:





  • docker pull datascienceworkshops/data-science-at-the-command-line 
  • docker run -it --rm -v "${PWD}":/data datascienceworkshops/data-science-at-the-command-line
You get introduced to the strength of (combining) commands like awk, aws, body, cat, cowsay, csv2vw, csvgrep, csvjoin, csvlook, csvsql, curl, cut, drake, dseq, dumbplot, find, git, head, header, join, jq, less, nl, node, parallel, paste, pup, python, R, Rio, scrape, seq, shuf, sort, sql2csv, tapkee, tr, tree, uniq, wc, which, xmlstarlet, zcat .

Try it for yourself! It's really easy > open a command line, install docker, install the container and play out the commands in the file and see what happens!


Thanks to Jeroen he lets me share this. And check out his company if you or your colleagues could benefit from the power of the command line!

Image source: the book Jeroen wrote, which you can find here.

woensdag, september 19, 2018

How does ePR compare to the GDPR

Next to the GDPR, there is also the ePrivacyRegulation. I found this analysis, with these summarized findings of how GDPR and ePR relate and compare:

“Our findings can be summarised as follows:

  • the ePR intends to particularise the rules of the GDPR insofar as it relates to processing of data that qualify as personal data;
    • however, it does not always succeed in this aim, because it does not actually complement, add to, or deviate from the GDPR in any meaningful way;
    • where the ePR does add to or deviate from the GDPR, it is unclear what the added value is, either in terms of enhancing data protection rights, or supporting the free movement of data and services;
    • in particular, there is an overreliance on ‘consent’ as a legal basis for data processing, which would exclude alternative legal bases permitted under the GDPR, like the need to process data for the purposes of a ‘legitimate interest’;
  • the ePR also intends to complement the rules of the GDPR, where the latter clearly does not apply, for example when it comes to data concerning legal persons;
    • however, the ePR’s added value here may also be marginal, as these data will in most cases also relate to natural persons;
    • moreover, the usefulness of covering legal persons by ePR-rules is limited as it will be problematic in practice to apply concepts like consent to legal persons; and
    • more fundamentally, one can question the suitability of applying the concept of privacy to corporate communications data (which is not personal data), especially in light of the fact that such corporate data will also enjoy protection under rules such”


zondag, juli 01, 2018

Hotelschakelingen, 2 draden, 3, 4 ... Beste site

Soms wil je wat met electriciteit, zeker als je aan de gang gaat met een 'slim huis'/smart home. Los van dat het soms lastig is te achterhalen hoe alles geinstalleerd is, is het fijn een goede site te hebben die laat zien hoe het nu zit met hotelschakelingen etc. Deze wil ik voor mezelf vastleggen, en misschien hebben anderen er ook wat aan ;-) > https://www.easy-do-it-yourself-home-improvements.com/3-way-switch-wiring-diagram.html .


woensdag, mei 02, 2018

Solved: stuttery YouTube playback on Chrome on Mac OSX

Since some time, whenever i played a YouTube video, the fan would start, and i would see high CPU usage (150% or more) of "Google Chrome Helper". Now, probably there are many possible causes and solutions, but for me, installing the Chrome extension h264ify seems to have solved. The extension forces YouTube to use the h264-codec, instead of the VP9 codec; the latter is preferred, but only on machines where Chrome uses hardware to do the necessary computations, which doesn't happen on many Macs (although i heard they are capable, but apparently Google hasn't given Chrome the necessary love so it actually uses that hardware on  the Mac).