JP Janssen

The transactions behind the OLGA NFT

OLGA is likely the first NFT ever created. It was made through the following bitcoins transactions: #1Tx Hash: e5e9f6a63ede5315994cf2d8a5f8fe760f1f37f6261e5fbb1263bed54114768aBlock: 305451Date: 2014-06-12View on Xchain.io and Blockchain.com.Purpose: Create OLGA token with description “One & Only”. #2Tx Hash: 34da6ecf10c66ed659054aa6c71900c807875cb57b96abea4cee4f7a831ed690Block: 305455Date: 2014-06-12View on Xchain.io and Blockchain.com.Purpose: Lock the token supply at one. #3Tx Hash: 627ae48d6b4cffb2ea734be1016dedef4cee3f8ffefaea5602dd58c696de6b74Block: 369466Date: 2015-08-11View on Xchain.io and Blockchain.com.Purpose: Embed the OLGA art piece on the blockchain. The third transaction contains a […]

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My experience of migrating a website from one webhost to another

I just transferred my website from Siteground to Hostinger. The process was pretty easy, although it took me a few hours due to a some hiccups. Transfer the filesI saved all files from Siteground to my computer via FTP (FileZilla) and then uploaded them to Hostinger. It was easy to do but it did take some time. It’s because of WordPress (WP). Plugins have added 10,000+ files to my directories. […]

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Global currency collapse in 2020?

Can the current economic crisis spiral into a full-blown currency crisis? And if so, will multiple currencies fail simultaneously? I do not pretend to know the answers, but here are my thoughts. Summary The bond market (debt market) is very fragile. Quantitative easing (QE) by central banks may have saved it from collapse during the 2008 banking crisis. This time around it’s not only banks, but everything from company junk […]

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Global platinum shortage when corona epidemic hits South Africa?

Seventy percent of the world’s platinum supply comes from South African mines. Will the coronavirus force a full shutdown of SA’s mines? As of today, 23 March 2020, SA is the country in Africa with the most confirmed coronavirus cases; 402, up by 128 in one day. Almost one in five South Africans are infected with HIV. That’s seven million people. Sixty percent of these also suffer from tuberculosis. Nearly […]

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Tip: Monthly backup of photos from phone (incl. WhatsApp)

Every month I copy all images and videos from my phone over to my laptop. How to do it quickly with Windows File Explorer: Connect your phone with a USB cable. Open the root Phone folder in Windows Explorer. Search for the relevant year and month, e.g. *201911 for November 2019. All photos and videos are then selected. Copy all the files. This works for my Android phone’s camera, WhatsApp […]

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Are rubber shield skate bearings lighter?

Rubber Shield Bearing

Question: Are inline skate bearings with rubber shields lighter than those with metal shields? Answer: A rubber shield bearing is 10.9 grams while a metal shield bearing is 11.3 grams. How I found out: I weighed a set of twelve new Wicked Twincam ILQ-9 Classic metal shield bearings. They weigh 135 g in total, which equates to 11.3 g each. Then I did the same for a set of new […]

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GoPro – How to shoot flicker free in Europe and Asia

Problem: Footage from my GoPro Hero 7 Black flickers if I shoot indoor. Solution: Go to Preferences -> Regional -> Video Format. Select PAL. From my tests, 25 fps and 50 fps are completely flicker free indoor under artificial lights. Computer monitors and TVs are also perfectly fine. The point is that these rates are only available under PAL. With NTSC you have the option between in 30 fps, 60 […]

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Tip: Consistent index in HTML drop-down list and JS array

Problem: Populate a drop-down list with array values. After a user selects a value, get the array index of that value. Solution: Populate the value attributes with the array indexes. These are hidden from the user. Here’s a working example: The page is nothing but a drop-down list: When a selection is made, a text is printed: P.S. In this example the first option is Select Car. It is not […]

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