## Engineer's Book

Engineers – Telecoms – Physics – Teaching – Methods

## Algorithmic 06 – The Billion, the Billion* ! Primes !

Written By: Jean-Paul Cipria

Prime numbers – The Billion* – © J.P. Cipria – 2017

Here after two days calculations by a simple computer with no bugs we do 1 billion searches by number of prime numbers in parts of density number $Density=\frac{dEntropy}{dx}$ then we do  $Calculations=\int_{x=1}^{10^9} x.\int_{Entropy=1}^{x~up~to~\sqrt(50847534)}d(Entropy)$ divisions. It is a … great number.

(*) : The billion, the billion : Title of a caricatural joke by « Les inconnus » to describe the very poor level of french television intended to brutify people and to elect a financial to the presidential position after DSK destructed by USA justice. France is not yet a Democraty since 2004. Be aware of that citizens, engineers and scientists. Let’s read « Tite Live Commentaries » by Machiavel in … 1515.

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Created :2017-05-31 17:32:12. – Modified : 2017-06-08 09:22:48.

« What’s Up, Doc ? » ©J.P. Cipria –

Very Easy Level (CM2 – Primary School)

Expériences En Construction.

Then it remains a small part of true … and enjoy it. It is just an cool play to heat my computer (30°C outhere – In may wheather is very pleasant in France. I regret to be forced to leave)   then computer stopped while processor heated. It sleeped a long time. I breathed it with my own … breath. It wake up and continued its job. Good computer !

… too follow : x=900 000 000 the may 31th at 17h29 TU+1. (Longitude don’t change. Sorry I am still in France. I am going to walk out … soon as possible).

Then after two days calculations for fun (not for my processor ?) it is possible to think about another method to obtain the same results. « And what about ? » can said idiot academic inspectors in France.

To follow … I don’t use my brain for nothing … You will see … Maybe ?

« It’s a long way to be at the top when you are a single scientist. »
– AC D … euh, JP Cipria. 😉 –
It’s not so easy to whistle electric guitar ! Then let’s sing it in your head : ♫ ♫ ♪ ♪ ♪ ♪ ♫ ♫♪ ♪ ♪ ♪ to coda and waoua, woua in your brain, if you can ?

# (suite…)

## Algorithmics 05 – Prime Numbers

Written By: Jean-Paul Cipria

(Fig.1) – Number of Prime Numbers Density-800k – ©J.P. Cipria – 2017

Why don’t we read [KARATSUBA-1963] references ? Has a habit there are two theorems :
. Theorem 1 called as Ofman.
. Theorem 2 called as Karatsuba.
. Lemme without a correct demonstration ?

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Created :2017-05-26 11:22:32. – Modified : 2017-06-12 10:02:28.

Very Difficult ! PhD Level.

Done … Un Café ?

Then 32 years later M. Karatsuba [KARATSUBA-1995] understand as a very high level what he said 32 years ago and it is more efficient to … understand it ! Then, doctors in sciences (PhD) please read only this last scientific reference ?

We continue by Matlab calculations how some theorems had proved by M. Karatsuba in 1995 in this article extract from annex thesis. So, hang in there and ride out the adverse periods. (Alors accrochez-vous et dépassez les étapes difficiles.)

Our first research question as a PhD scientist is :

# (suite…)

## Algorithmics 04 – Prime Numbers – Erathostene Algorithm

Written By: Jean-Paul Cipria

Compiled Matlab Calculations – ©J.P. Cipria

How do Calculate the first Prime Numbers when we use Erathostene Methods ?

# Why use Prime Numbers when you are Physicist or an Engineer ?

## Then let’s try to do a multiplication ?

How you do it pratically ? You use « Classic Method » when you write first operand then you multiply with second operand less digit … then you do the same with second operand second digit with a base 10 shift. After all … you add all this operation N times. Then you did $N^2$ operations.

But we are physicists then we do $N=1000000$ multiplications for a single 3D radar signal. Then we performed $N^2=1 000 000 000 000$ single operations !!! That’s is boring for time, money, memory and computer availibility and Engineer skills !

## Lettre à la Main

Written By: Jean-Paul Cipria

## Robotics – Industrials 4

Written By: Jean-Paul Cipria

Here a small film on how to Program a Trajectory on a Defined Plan … then we 3D Change Referential Position and we perform the same Program. Whats Up, Doc ?

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Created :2017-05-18 18:03:34. – Modified : 2017-05-26 16:01:21.

26 views on 10/05/17.
37 : 12/05/17

Experiment in Progress.

Is’nt it Fun to be an Engineer and think in relative 3D space without beeing Einstein ? Do Financials think it’s a loss of public money ?

Let’s remember, technicians, that in 1969 an engineer waited that his auto-navigation computer controlled 3D attitude, altimeters, 6 relative speeds, radars, with a 0.000079 Gbyte ROM Program ! Then after a while this very cool pilot took his joïstick to change the automatic trajectory to « moon » on a plane position.

• « LEM from Houston, how’s your consumption ? » – « 10 seconds remaining that’s suffisant. » Answered the phlegmatic astronaute.

What’s up since 1969 ? How are technologies progress ? [CIPRIA-2017]

« What’s Up, Doc ? »  ©Cipria

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