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Younes Ben-Ghabrit

Publications and source records attributed to Younes Ben-Ghabrit.

2 recordsLinked to original sources

The normaly distributed daily returns in stock trading

In this report, we talked about a new quantitative strategy for choosing the optimal(s) stock(s) to trade. The basic notions are generally very known by the financial community. The key here is to understand 1) the standard score applied to a sample and 2) the correlation factor applied to different time series in real life. These notions are the core of our research. We are going to begin with the introduction section. In this part, we talked about variance, covariance, correlation factor, daily returns in stock trading and the Shapiro-Wilk test to test the normality of a time serie. Next to that, I talked about the core of my method (what do you do if you want to pick the optimal(s) stock(s) to trade). At the end of this report, I talked about a new idea if you want to analyze more than one stock at the time. All my work goes with a primary reflexion : forecasting a stock direction is a random walk and nobody can be 100 % sure where a stock is going. All we can do, is to pretend to have a technic with a win/loss ratio greater than 51 %.

q-fin.TR↗

Trajectoire d'un satellite artificiel en chute autour de la terre

The project consists to determine, mathematically, the trajectory that will take an artificial satellite to fight against the air resistance. During our work, we had to consider that our satellite will crash to the surface of our planet. We started our study by understanding the system of forces that are acting between our satellite and the earth. In this work, we had to study the second law of Newton by taking knowledge of the air friction, the speed of the satellite which helped us to find the equation that relates the trajectory of the satellite itself, its speed and the density of the air depending on the altitude. Finally, we had to find a mathematic relation that links the density with the altitude and then we had to put it into our movement equation. In order to verify our model, we'll see what happens if we give a zero velocity to the satellite.

physics.space-ph↗