Tag: Sam Ansari

The Ever Expanding Universe

The ever expanding universe

For thousands of years, astronomers wrestled with basic questions about the size and age of the universe. The ancient Greeks recognized that it was difficult to imagine what an infinite universe might look like. But they also wondered that if the universe were finite, and you stuck out your hand at the edge, where would your hand go? When Einstein developed his theory of gravity in the General Theory of Relativity, his equations said that the universe should either be collapsing or expanding, whereas he assumed it was static. After Hubble discovered that the universe […]

18 mei • Door Sam Ansari Tijd om te lezen Estimated reading time: 6 minuten

Why Formula 1 is crucial for our safety

Many of you have probably watched the most recent race in Imola, where Max Verstappen achieved his 11th career win. During the Grand Prix, two drivers crashed into each other at 300 kilometres per hour and caused the race to be red-flagged. Luckily, the drivers could get out of their cars with no scratches. Had this accident occurred 30 years earlier, however, we would have seen a completely different outcome. The early days Formula 1 is the highest class of international auto racing for single-seater formula racing cars. It is the pinnacle of autosport and […]

22 april • Door Sam Ansari Tijd om te lezen Estimated reading time: 4 minuten
Interview with TKP

Interview with TKP

TKP, have you already heard of them? When you are a student in Groningen, the answer is probably yes. You probably have encountered their famous ‘red tower’ on the ring road numerous times. However, there are also a lot of students who have heard of them but still do not know what it is exactly that they do. Therefore, we have performed an interview with Harm Donkers-Kim of TKP to get to know everything about them. In this article, we will discuss all the ins and outs of the company, their advancements in the field […]

30 maart • Door Sam Ansari Tijd om te lezen Estimated reading time: 5 minuten

Is OLS a thing of the past?

One of the most popular regression methods an econometrician learns is the Ordinary Least Squares (OLS). It is a simple and elegant way of estimating parameters in linear regression. However, there is another technique to perform linear regression using concepts from machine learning. This concept is called gradient boosting and is also related to decision trees.    Decision trees A decision tree uses a tree-like model of decisions and possible consequences. It is a very common data mining algorithm used for operations research, specifically in decision analysis. The idea behind it can easily be understood […]

23 februari • Door Sam Ansari Tijd om te lezen Estimated reading time: 10 minuten
The medical test paradox

The medical test paradox

Testing has been quite a significant subject during this pandemic. Around 30.000 people a day are being tested in the Netherlands alone, so it is quite important that such a test can accurately predict whether someone actually has the disease. However, an accurate test is not always as predictive as you would like. This phenomenon is also known as “the medical test paradox”.   Bayes’ rule The medical test paradox is an example that is quite often used to introduce Bayes’ rule. In Bayesian statistics, the interpretation of probability is expressed as a degree of […]

07 januari • Door Sam Ansari Tijd om te lezen Estimated reading time: 7 minuten
Machine learning in financial markets

Machine learning in financial markets

Data has become extremely valuable to many companies in the world. Huge data centres are being built to cope with the vast amount of it that is being transmitted every single second. Especially with the rise of AI and specifically machine learning, this information can be used to build models that can predict future outcomes with phenomenal accuracy. These techniques could also be very powerful when we want to predict stock markets. However, stock prices can be very volatile and investor sentiments can influence these prices as well, so how accurate are these machine learning […]

27 oktober • Door Sam Ansari Tijd om te lezen Estimated reading time: 8 minuten
Mathematical magic

Mathematical magic

Many card tricks in this world involve some fancy hand movements. However, there are also many tricks that involve some mathematics. During these very busy times with exams, I present some card tricks to get your mind off studying and challenge your brain in a whole different way.   52 factorial The first mind-boggling property of a regular 52 card deck, is the number of different ways we can arrange such a deck. The top card can be any of the 52 cards, the next card can be any of the 51 other cards and […]

25 juni • Door Sam Ansari Tijd om te lezen Estimated reading time: 6 minuten
The big tech 'bubble'

The big tech ‘bubble’

Google, Amazon, Facebook, Apple and Microsoft, also known as GAFAM, there is not a shred of doubt in my mind that you have used some service or product from one of these companies today. With a combined revenue of over 800 billion dollars in 2019, they almost make up the entire economy of the Netherlands (850 billion dollars in GDP). It is quite difficult to get your head around the incredible figures they can make in one year. Whether it is your mobile phone, buying something online or the software your computer or smartphone uses […]

26 mei • Door Sam Ansari Tijd om te lezen Estimated reading time: 9 minuten
Peer pressure

Peer pressure

In the past few weeks, our supermarkets have been swamped by a huge demand for durable goods. This is due to the quarantine measures our government has taken to prevent the spread of the coronavirus. However, despite the notion of our prime minister to discourage buying every single roll of toilet paper, people still continued hoarding these goods. This behaviour is very typical in crisis situations and experiments have been conducted to explain the psychology behind peer pressure. Asch conformity A pioneer of social psychology Solomon Asch introduced fundamental concepts in conformity and many other […]

26 maart • Door Sam Ansari Tijd om te lezen Estimated reading time: 4 minuten
Predicting the spread of the Coronavirus

Predicting the spread of the Coronavirus

With over 86,000 people infected and around 3,000 people killed, the new Coronavirus is something to be taken very seriously. The new virus which has been called Covid-19 was discovered in Wuhan, China earlier this year. Not only has it taken a big toll on the Chinese economy, other countries in the world are being affected by the virus as well. In order to tackle the virus, several organisations have volunteered to help China with the fight against the virus. Moreover, several scientists are coming up with models to predict where and when the virus […]

03 maart • Door Sam Ansari Tijd om te lezen Estimated reading time: 12 minuten
The beauty behind differential equations

The beauty behind differential equations

It is one of the most difficult courses of the year: Difference and differential equations. Where most us do not really understand what we are actually learning and doing. In this article I will try to explain that differential equations are actually one of the most beautiful concepts in mathematics. What is a differential equation? A differential equation is an equation that relates some function with its derivatives. In applications; differential equations give us an understanding how physical phenomena relate to their rates of change. The laws of physics are usually always describable through differential […]

17 december • Door Sam Ansari Tijd om te lezen Estimated reading time: 5 minuten
Predicting outcomes of tennis matches

Predicting outcomes of tennis matches

In the article posted 4 weeks ago about the dark side of the tennis world I talked about how vulnerable the tennis sport is to match fixing. Bets can even be placed on every single point. However, is there a way to predict the outcome of matches and maybe even points? There are multiple articles that have tried to solve this problem. Many of these articles mention Markov models as I explained earlier. Now I will be digging deeper into this subject and try to predict a match between Rafael Nadal and Roger Federer. Markov […]

05 november • Door Sam Ansari Tijd om te lezen Estimated reading time: 12 minuten

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