Neil Turok has got new views and insights about black holes and the beginning and structure of the universe which differ from the established scientific opinion of the majority.
WP: Neil Turok
Neil Turok
Neil Turok on the case for a parallel universe going backwards in time (25 January 2023)
A mirror universe might tell a simpler story: Neil Turok (November 8, 2023)
Why should we encrypt (and/or sign) emails? The question should be the other way: why does anyone think and act like this isn't the default?
Benjamin Ismaïl from Reporters without Borders gives some insights (French with English subtitles).
Thermodynamics and probability theory have something in common: the idea of entropy. What exactly is entropy? How can it be understood on an intuitive level without to much mathematics? This is an introduction with simple ideas from physics.
There is a proposal for an experiment to decide whether general relativity is not correct at the quantum level. This opens a window to understand which way towards a theory of quantum gravity might be chosen.
Prof Vlatko Vedral
Vlatko Vedral, Professor of Quantum Information Theory
WP: Vlatko Vedral
Chiara Marletto - Wolfson College
Chiara Marletto
Constructor Theory
WP: Chiara Marletto
Gravitationally-induced entanglement between two massive particles is sufficient evidence of quantum effects in gravity
I rediscovered an old video I had been searching for for a long time. Watch, enjoy and be astonished.
David Richeson: Division by Zero
David Richeson
WP: David Richeson
The strength of the electromagnetic interaction is desribed by the fine-structure constant aka Sommerfeld constant. It appears at different places in modern physics in an almost magical way, and it still remains mysterious.
Quote Wolfgang Pauli: When I die my first question to the Devil will be: What is the meaning of the fine structure constant?
WP: Fine-structure constant
WP: Arnold Sommerfeld
WP: Wolfgang Pauli
The lifetime of the universe has not been long enough to transport information from every place to every other place. Despite this fact regions in different directions without contact have similar properties. How does this work? Superluminal transport of information is excluded by relativity. The observations of the cosmic microwave background are astonishing.
Last time pinentry appeared as final missing piece to have a complete working self compiled GnuPG suite. To avoid old software and libraries from the distribution to the possible extend, we choose eight tarballs from the GnuPG Download page to be compiled.
Some parts require newer self compiled versions of libraries, other might benefit but can be compiled with the older versions from the distribution. It is an annoying exercise to figure the dependencies out by studying the documentation or the ldd output without being able to see them. Therefore I created an ASCII graph as pictorial support for understanding the situation.
The dependency graph has got two entry points, i.e. libraries to start with. These require no other libraries from the project itself and can be compiled against the distribution: libgpg-error and npth. Then there are two exit points, which provide the tools for usage of GnuPG: gnupg and pinentry. These tarballs are supposed to be compiled at the end. The order of compilation of the other four tarballs can be obtained from the dependency graph. There is one rule: compilation order in vertical path direction must always be downwards. The order in horizontal direction is given by arrows, but there is some redundancy in the graph, which makes the graph a little bit bigger, but this avoids possible misunderstandings by ignoring the arrows. The vertical rule should be enough to have an intuitive understanding of the digraph character. And another point: explicit dependencies are explicit paths without an intermediate library, e.g. everything except npth depends on libgpg-error and can be reached from it by a path not meeting any other library, as shown in the graph.
L0 libgpg-error | | | +---->----+---->----+--------->---------+---->----+ | | | | | | | | | | | | L1 npth | | | | | | | | | | | | | | | | | | | L2 | | libgcrypt | | | | | | | | | | | | | | | | | L3 | libksba +--------->---------+ libassuan | | | | | | | | | | | | | +---->----+ +----<----+ | | | | | | | | | | | | | | | | | | | | | +----<----+ +---->----+ | | | | | | | | | | | | L4 | | ntbtls +----<----+ | | | | | | | | | | | | | | | +---->----+---->----+---------<---------+ | | | | | | | L5 gnupg pinentry
There is no unique order fixed by the graph, thus parts of the order can be considered as suggestion or recommendation. If you use the order from the download page (see above) and move GnuPG (devel) to the end of the list, this order should work, too.
In the future libgpg-error will be renamed gpgrt.
To be continued...
This is part II about a philosophical as well as empirical viewpoint about our universe (part I).