Barcode Reader This code sample shows how to read a barcode using the Image Capture API and Barcode Detection API. The code works only in a secure environment (HTTPS). Readings ImageCapture - Web APIs | MDN (mozilla.org) Barcode Detection API - Web APIs | MDN (mozilla.org) Usage Click [...]
Room temperature Superconductivity induced by nanotube confinement What if we take a carbon nanotube, place it in a cryogenic environment, fill it with He atoms, then take it to standard temperature and pressure: are the He atoms confined sufficiently by the nanotube to maintain their electrons in Cooper pairs? [...]
TSQL Bulk editing XML field XML fields in MS SQL Server are powerful yet cumbersome; the script below, albeit its limitations, manages effortless insertions, updates and deletions of a simple one level deep XML fragment. Let's see how it works: the function receives two XML fragments, the first [...]
Synchronize PrestaShop using webservices API and PowerShell The code below uploads to a PrestaShop catalog data fetched from an ERP. The code is generic up to the ### ERP specific section; ERP dependend SQL queries fetch data that is sent to the products, images/products and specific_prices PrestaShop webservices [...]
Fill DOCX with XML data using Powershell Given a Microsoft DOCX document ("template") sprinkled with @@<tag> constructs, and, XML data that includes elements <tag>, the script below makes a copy of template and replaces, preserving style, the @@<tag> occurances with the XML element contents. The XML data may be [...]
RS485 Modbus RTU relay board with PowerShell Serial comunication with a 4 Channel RS485 Modbus RTU relay board via a universal USB - RS485 dongle using PowerShell. Relevant links: https://unserver.xyz/modbus-guide/ https://www.tanzolab.it/R41A08 https://github.com/Erriez/R421A08-rs485-8ch-relay-board Write-Host "Available ports:" ([System.IO.Ports.SerialPort]::getportnames()); $COM = "COM4"; $SLAVE_ID = 0x03; # Append 2 byte MODBUS-16 CRC [...]
Programming Paradigms A picture is worth a thousand words, that may be, but not the types of words that I'm thinking of. ...
Geek timeline This is my work in process timeline; each milestone lists the hardware, operating systems, programming languages and developments I focused on. I have to thank my father for the Apple ][ plus back in 1979; I asked him why he bought it: "Well, I had no [...]
Quantum Computing Notes Quantum computing exploits quantum behaviors, such as superposition and entanglement, to perform computations; it is thanks to these behaviors that NP-hard problems can be solved in a reasonable time (NP-hard problems are combinatorial in nature, their solution involves the determination of optimal combinations). It must be [...]
Quantum Physics Thoughts Electron orbitals are 3D standing waves The nodes of the 3D standing waves are surfaces: they represent position of 0 change (change of what?) The antinodes are also surfaces: they represent position of maximum change (change of what?) Each orbital represent an harmonic Nuclei are [...]