Science4All

Welcome to Science4All

My name is Lê and I believe that the greatest challenge in education is to make science and math appealing.
This is why I aim at bringing enthusiasm and excitement to the readers’ learning experience.
I now run a Robustly Beneficial wiki, mostly on AI ethics, which has come to fascinate me!

Check my articles

Temperature Misconception: Heat is Not How it Feels

Temperature Misconception: Heat is Not How it Feels
By Lê Nguyên Hoang | Updated:2015-12 | Views: 3022
In the last FIFA football world cup, many players complain about Manaus' unbearable heat condition. Yet, the thermometer only went up to 30°C (86°F). Why is that? Well, as it turns out, how you feel is not really the outside temperature. This article unveils many of our deep misconceptions about heat.

Optimization by Integer Programming

Optimization by Integer Programming
By Lê Nguyên Hoang | Updated:2016-01 | Prerequisites: Optimization by Linear Programming | Views: 8670
Integer programming is arguably the greatest achievement of applied mathematics. Half of the time, it's what's used to solve real-world problems!

The Revolutionary Galois Theory

The Revolutionary Galois Theory
By Lê Nguyên Hoang | Updated:2016-02 | Prerequisites: Linear Algebra and Higher Dimensions, Imaginary and Complex Numbers, Symmetries and Group Theory | Views: 21958
In 1832, Évariste Galois died. He was 20. The night before his death, he wrote a legendary letter to his friend, in which he claims to have found a mathematical treasure! Sadly, this treasure had long been buried in total indifference! It took nearly a century to rediscover it! Since then, Galois' legacy has become some of the finest pure mathematics, which represents a hugely active field of research today with crucial applications to cryptography. Galois' work is now known as Galois theory. In essence, it unveils the hidden symmetries of numbers!

A Model of Football Games

A Model of Football Games
By Lê Nguyên Hoang | Updated:2016-02 | Views: 7665
Back then, I simulated the outcome of the 2006 World Cup, based on a modelling of football games. This article explains this model and presents its results.

Spacetime of Special Relativity

Spacetime of Special Relativity
By Lê Nguyên Hoang | Updated:2016-02 | Views: 3500
Einstein's theory of relativity is the best-known breakthrough of the History of science. The reason for that isn't only the accuracy of the theory, but also and mainly its beauty. As Einstein once said: "Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone." This is what the article aims at showing Einstein's simple ideas of special relativity and their beauty.

Glaciers: Retreat, Moraines, Valleys, Fjörds

Glaciers: Retreat, Moraines, Valleys, Fjörds
By Lê Nguyên Hoang | Updated:2016-02 | Views: 1194
Glaciers are spectacular phenomenons of nature. The physics they are based on is surprising, while the geological role they have is essential. In this article, we discuss these facts, as well as their retreats and their dangers.

Model-Dependent Realism

Model-Dependent Realism
By Lê Nguyên Hoang | Updated:2016-02 | Views: 4490
Introduced by the two renowned theoretical physicists Stephen Hawking and Leonard Mlodinov in their book The Grand Design in 2010, model-dependent realism is a new controversial understanding of the universe. Based on solid logical reasonings and recent developments in physics, this concept may well be an incredible breakthrough for philosophy and science, as well as metaphysics.

The Addictive Mathematics of the 2048 Tile Game

The Addictive Mathematics of the 2048 Tile Game
By Lê Nguyên Hoang | Updated:2016-01 | Views: 27941
2048 is the Internet sensation of the year. This very addictive game has been downloaded hundred of millions of times. Interestingly, this game raises plenty of intriguing mathematical questions. This article unveils some of them!

Imaginary and Complex Numbers

Imaginary and Complex Numbers
By Lê Nguyên Hoang | Updated:2016-02 | Views: 6776
My first reaction to imaginary numbers was... What the hell is that? Even now, I have trouble getting my head around these mathematical objects. Fortunately, I have a secret weapon: Geometry! This article proposes constructing complex numbers with a very geometrical and intuitive approach, which is probably very different from what you've learned (or will learn).

Symmetries and Group Theory

Symmetries and Group Theory
By Lê Nguyên Hoang | Updated:2016-02 | Views: 5076
Beauty is extremely hard to define. Yet, physicists and artists seem to agree on an important feature of beauty, created by mathematicians: Symmetries. This article aims at introducing the beauty and the concepts on symmetries, from the basic geometrical symmetries to the more abstract fundamental automorphisms.

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