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.
Science4All is also available in French.

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Regulation of Electricity Markets

Regulation of Electricity Markets
By Lê Nguyên Hoang | Updated:2016-02 | Views: 1668
Electricity markets are not like any markets. In particular, they cannot be liberalized without regulation. In the article, I list the reasons why this market is specific and I conclude by giving you important features of a good regulation.

Self-Reference, Math Foundations and Gödel’s Incompleteness

Self-Reference, Math Foundations and Gödel’s Incompleteness
By Lê Nguyên Hoang | Updated:2016-02 | Views: 4439
Although highly appreciated by artists, self-reference has been a nightmare for mathematicians. It took one of the greatest, Kurt Gödel, to provide a better understanding of it. This article deals with paradoxes, recursion, fractals and Gödel’s incompleteness theorems.

Mechanism Design and the Revelation Principle

Mechanism Design and the Revelation Principle
By Lê Nguyên Hoang | Updated:2016-02 | Views: 4463
Whenever you need to make a group of people interact, you are designing a mechanism. If you want to achieve a good interaction, you need to make sure your mechanism is well designed. In this article, I’ll show you main features of mechanisms through various examples. I’ll also talk about a great mathematical tool for mechanism design: the revelation principle.

Computing Hunger worldwide: the Global Hunger Index (GHI)

Computing Hunger worldwide: the Global Hunger Index (GHI)
By Estève Giraud | Updated:2015-12 | Views: 547
The Global Hunger Index was first published in 2006 by the International Food Policy Research Institute and the NGO Welthungerhilfe. In 2007, Concern worldwide joined them. Since then, the Index reports every year the evolution of the hunger situation worldwide and focus on a given topic. How is it calculated? And what is hunger? How are we connected ? What can be done? To learn more, read the article below.

The coach’s dilemma.

The coach’s dilemma.
By Herminio López | Updated:2016-02 | Views: 796

Differential Calculus and the Geometry of Derivatives

Differential Calculus and the Geometry of Derivatives
By Lê Nguyên Hoang | Updated:2016-02 | Views: 6135
Differential calculus is one of the most important concept of mathematics for science and engineering. This article focuses on its fundamental meaning.

Conditional Probabilities: Know what you Learn

Conditional Probabilities: Know what you Learn
By Lê Nguyên Hoang | Updated:2016-02 | Views: 4443
Suppose a man has two children, one of them being a boy. What’s the probability of the other one being a boy too? This complex question has intrigued thinkers for long until mathematics eventually provided a great framework to better understanding of what’s known as conditional probabilities. In this article, we present the ideas through the two-children problem and other fun examples.

The Biology Civil War Opposing Kin to Group Selection

The Biology Civil War Opposing Kin to Group Selection
By Lê Nguyên Hoang | Updated:2015-12 | Views: 3390
In 2010, a controversial article published in Nature violently criticized the last 40 years of developments in evolutionary biology, triggering an ongoing war within the scientific community. This article explains the essence of the controversy!

From Divide and Conquer to Parallelization

From Divide and Conquer to Parallelization
By Lê Nguyên Hoang | Updated:2015-12 | Views: 1574
Divide and conquer is a extremely powerful concept that is being used a lot in computer science, and that can also be applied in real life. We present its application to sorting algorithms. Then we’ll talk about a major fundamental open mathematical problem, called P=NC.

Shannon’s Information Theory

Shannon’s Information Theory
By Lê Nguyên Hoang | Updated:2016-01 | Views: 40452
Claude Shannon may be considered one of the most influential person of the 20th Century, as he laid out the foundation of the revolutionary information theory. Yet, unfortunately, he is virtually unknown to the public. This article is a tribute to him. And the best way I’ve found is to explain some of the brilliant ideas he had.

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