This is a (German) summary of basic nuclear reactor physics that has been written by me during learning for the exam of an university course.

This is a short (German) summary of the WKB approximation applied to the time invariant SchrÃ¶dinger equation, which is a method used for finding approximate solutions to linear differential equations with spatially varying coefficients.

The fast and short answer to the question which speed would be (under optimal conditions) the speed to choose for maximum car throughput on a single lane. Contrary to the often believed fact it's shown that higher speed does not correlate with higher throughput by using simple high-school math.

This post describes a simple derivation of the complex inpedance formulas well known from electronics.

Mini article about the measurement of capacitance with AVRs with a minimum of external components (in it's most extreme form none external components exploiting the gate capacitance of the micro-controllers input)

A short summary about the different meaning and interpretation of impedance, ABCD, scattering and transfer parameters in simple (linear) two port networks.

Short summary of various commonly used Gaussian integrals (1 dimensional) most of the time not shown in school textbooks.

A short summary about the basic properties of Maxwell equations, the resulting electromagnetic wave equations and commonly used gauges (Lorenz, Coulomb).

Just a short description of what I've tried (and didn't expect to work) about the usage of 3D printed parts made out of PLA in the typical desktop FDM 3D printing process, i.e. a method to build really low cost parts at home.

Something easy and simple. How to cut glass tubes and other glass parts using electrically heated hot wire.

A short summary about the operation and characteristics of thermionic emission cathodes, the current limiting factors and the most important failure modes

Mini blog article that summarizes the build of a simple 2 mA beam current electron gun from common of the shelf components gathered from the hardware store as well as some 3D printed components.

A short summary about the basic conditions in a pierce type electron gun

A mini summary on how to perform impedance matching for antennas or other devices using the NanoVNA v2 together with the NanoVNASaver and SimSmith applications based on the impedance matching of an electron deflection system

Table containing the typical atmospheric air components as well as their mean thermal speed and mean molecular mass.

Dipl.-Ing. Thomas Spielauer, Wien (webcomplains389t48957@tspi.at)

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