Dynamic topography refers to the variation in the Earth's surface elevation due to dynamic processes occurring beneath the crust, primarily influenced by mantle convection and tectonic activity. Unlike static topography, which is determined by features such as mountains, valleys, and plateaus formed through geological processes like erosion and sediment deposition, dynamic topography changes over geological timescales because of movements within the Earth's mantle.

Isostasy is a geological concept that describes the state of gravitational equilibrium between the Earth's lithosphere (the rigid outer layer of the Earth) and the underlying asthenosphere (a semi-fluid layer of the upper mantle). According to the principle of isostasy, the Earth's crust "floats" on the denser, more fluid mantle beneath it, much like an iceberg floats in water.

Slab pull is a geological process that describes the movement of tectonic plates, particularly the oceanic lithosphere, as it subducts into the Earth's mantle. This phenomenon occurs at convergent plate boundaries, where one tectonic plate is forced under another. As the denser oceanic plate sinks into the mantle, it pulls the rest of the plate along with it, creating a pulling force. This mechanism is significant in explaining the dynamics of plate tectonics.

The Global Navigation Grid Code (GNGC) is not a widely recognized term as of my last update in October 2023. However, it may refer to a system or code used for global navigation, possibly in the context of geographic information systems (GIS), satellite navigation, or related fields. In these areas, grid codes can be essential for identifying specific locations on Earth, coordinating movement, or organizing spatial data.

The Maidenhead Locator System, also known as the grid locator system, is a geographic coordinate system used primarily by amateur radio operators to specify locations on the Earth's surface. It is a way to simplify the reporting of location coordinates, turning complex longitude and latitude into a more manageable alphanumeric format. The system divides the world into grid squares, each identified by a combination of letters and numbers. The format consists of two letters followed by two numbers, and sometimes followed by an additional pair of letters (e.

The Swedish grid, or the Swedish national grid, refers to the system of geographical coordinates used in Sweden. It is primarily based on the Swedish National Grid (Swedish: "Svensk Nationell Grid") or SWEREF 99 TM (Transverse Mercator), which is a projection system designed to provide accurate positioning for mapping and navigation within the country.

The Jaramillo reversal refers to a specific geomagnetic reversal that occurred approximately 900,000 years ago during the Pleistocene epoch. It is characterized by a significant change in the Earth's magnetic field, where the magnetic north and south poles switched places. This event is one of several geomagnetic reversals recorded in the geological and fossil record, which have been identified through paleomagnetic studies.

Followup to Quantum field theory lecture by Tobias Osborne (2017).

When the word "advanced" precedes QFT, you know that the brainrape is imminent!!!

Big goal: explain the Standard Model.

Gaussian path integrals.

This book really tries to recall basic things to ensure that the reader will be able to understand the more advanced ones.

Sometimes it goes a little bit overboard, like defining what a function does several times.

But Ciro Santilli really prefers it when authors error on the side of obvious.

People are mostly saying you have to be a more of a genius amateur to read it.

Author: en.wikipedia.org/wiki/Anthony_Zee from University of California, Santa Barbara.

ISBN-13: 978-0691140346

Amazon: www.amazon.com/dp/0691140340

lecture 1 mentions that this book is quick and dirty, as one might guess from the title. Ciro Santilli thinks he's gonna like this one.

First edition: from 2003, www.amazon.com/dp/0691010196, ISBN-13: 978-0691010199.

Summary:

A dip circle, also known as a dip needle or magnetic dip instrument, is a type of scientific instrument used to measure the angle of inclination of the Earth's magnetic field relative to the horizontal plane. This angle is known as the magnetic dip or magnetic inclination. The dip circle typically consists of: 1. **A magnetic needle:** This needle is freely pivoted and can rotate in a horizontal plane. The needle aligns itself with the local magnetic field.

This didn't really deliver. It does start from the basics, but it is often hard to link those basics to more interesting or deeper points. Also like many other Quantum field theory book, it does not seem to contain a single comparison between a theoretical result and an experiment.

This is very widely used in courses as of 2020, it became kind of the default book.

Unfortunately, this approach bores Ciro Santilli to death. Or perhaps is too just advanced for him to appreciate. Either of those.

800+ pages.

This is one of the first examples in most quantum field theory.

It usually does not involve any forces, just the interpretation of what the quantum field is.

www.youtube.com/watch?v=zv94slY6WqY&list=PLSpklniGdSfSsk7BSZjONcfhRGKNa2uou&index=2 Quantization Of A Free Real Scalar Field by Dietterich Labs (2019)

Some of the most remarkable ones seem to be:

Natural language diversity is beautiful, but useless.

The fact that in poor countries a huge number of people do not speak the economically dominating language of the world, the lingua franca, English as of 2020, is a major obstacle to the development of those countries.

Despite us being in the information age, the people in those countries cannot fully benefit from it at all!

Teaching its people English should be the number one priority of any country. Without that, there can be no technological development. Everything else is secondary and can be learnt off the Internet once you know English.

And the most efficient way to do that, is that every country should create amazing free open source English learning material for their own language.

European countries are perhaps the most perfect example of how many languages destroy once powerful countries: Section "European Tower of Babel"

The Sapir–Whorf hypothesis is bullshit outside of poetry, and the ending of Arrival (2016) makes one want to puke, where learning a language changes not only your brain, but also Ciro's precious "laws" of Physics!

Much more likely are To Serve Man/A Small Talent for War events which we have already seen countless times!

Remember that those ideas come from a person who speaks 3.5 languages in 2019, and sees absolutely no practical difference between them.

Of course, like all non-constructed languages, English is not fully optimal in terms of regularity and information density. It could be argued that other languages are better in those aspects.

For example, Ciro does believe that spoken Chinese is a better language than English overall from a purely "ease of learning from scratch point of view" as mentioned at: github.com/cirosantilli/china-dictatorship/tree/6fdeb5aa3826c69f7c058de4e6f652a6924bc08a#does-ciro-santilli-speak-chinese. Chinese writing is completely insane of course, completely out of the question.

However, Ciro just doesn't think that the difference is that great to justify replacing English which is already dominant. How much more efficient can a perfect constructed language be than English? 1.01? 1.001? Such margins don't matter. Once you have learnt it young, it's done, for good.

English-based a posteriori constructed languages that regularize English further are perhaps the only reasonable alternative, like how C++ evolved from C by creating a low cost upgrade path. Although in practice they will never take off unless a dictatorship rules the world:

One interesting anecdote is that Ciro met his wife in French, and talking to her primarily in English feels really weird, so language does matter in love.

Different languages might also good at producing interesting diverse touristic locations, with different diverse and interesting foods. Because that's what tourism is all about. The exotic. The unique. And therefore, also necessarily the inefficient.

People with similar ideas: