Archive for the ‘News’ Category

[¯|¯] Video Lezioni di Calcolo Tensoriale

mercoledì, Febbraio 5th, 2020

calcolo tensoriale,video lezioni,geometria differenziale
Fig. 1

A breve partirà un ciclo di video lezioni di Calcolo Tensoriale.

Faremo riferimento ai libri di fig. 1. Anche se un pò datati, gli autori sono esperti di questa ostica materia. Precisamente:

  1. Strutture algebriche. Operatori lineari.
    Questo testo parte da zero o meglio dall'algebra astratta in su, cioè passando per l'algebra lineare per poi approdare all'algebra multilineare e quindi, al concetto di tensore. Questo è il cosiddetto abbroccio algebrico per introdurre tale importante ente matematico che, come è ben noto, riveste un ruolo fondamentale in Relatività Ristretta e in Relatività Generale.
    Nella parte seconda del libro, si passa dal metodo algebrico alla geometria differenziale in modo da poter definire in maniera operartiva la nozione di campo di tensori.

  2. Introduzione ai metodi della geometria differenziale. Per ingegneri e fisici.
    È praticamente una continuazione del primo. È abbastanza ostico, perché affronta la difficile definizione di Varietà differenziabile che intuitivamente, si presenta come la fisiologica generalizzazione del concetto di superficie. Tale ente è fondamentale per la Relatività Generale, giacché il ben noto spaziotempo altro non è che una varietà differenziabile pseudoriemanniana.

  3. Geometria differenziale (della collana Schaum).
    È un testo molto utilizzato nelle università USA, e come tale caratterizzato da una certa praticità di esposizione dei concetti, nel pieno rispetto del rigore matematico. Come in tutti i testi della predetta collana, ogni capitolo si conclude con una nutrita serie di esercizi difficili.

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An Introduction To Radio Controlled Aeroplanes And Boats

lunedì, Febbraio 3rd, 2020

"This is scrumptious," Leeanne little bit into the Taco, relishing the first bite. "Oh boy, this is hot," she stated as the attempted the salsa. The waiter returned with more drinking water and cornbread.

She spent the subsequent hour cruising Cosmos, sampling foods from different components of the world, and even from various planets. Overall, Leeanne loved what she experienced noticed of Cosmos. She would arrive here much more often.

This is a toy, something for the individual who has every thing and I ought to probably add- searching at the cost of this, you ought to be pulling in at least 6 figures to rationalize this purchase. If this is the case, then this is the toy for you!

It is able to go up to 300m and fly for approximately 15 minutes when you've received it fully billed. What's even much better, this exciting model is able to turn out to be airborne straight off the floor, or from your personal hands. This tends to make it one of the more accurate models that you will find for radio manage aeroplanes.

They will give you the appear and feeling of a complete dimension aircraft, but are compact enough that you can fly them anywhere. Once this kind of plane is the 3CH Jaguar model that comes dressed in full army paint, and is one you and your children can certainly admire. It has the ability to go up to 300m and fly for about 15 minutes when you have it fully charged. Very best of all, this thrilling model has the ability to become airborne directly off the ground, or from your personal hands. This makes it 1 of the much more accurate models that you will discover for radio managed aeroplanes. For some, the preliminary expense that comes into perform for the radio controlled aeroplanes can be unnerving, and you may want to attempt a cheaper model out before MAD Hovercraft you spend a great offer of money.

My daughter insisted on assisting and soon had glue all over her fingers, shirt and pants. We spent about an hour fixing the harm, and ungluing her fingers from the plane. We talked and laughed alongside the way, leaving proof of her sticky fingers all more than the plane. It was enjoyable. She was pleased and sticky. Our RC aircraft didn't appear fairly a pristine as it did a couple of hrs in the past, but it was prepared to fly again!

3) System - Pretty much a difficult, flat piece of material where the pilot sits. It also keeps the skirt flattened to ensure that air pressure is evenly spread. You're platform can be manufacturing MAD Hovercraft of anything difficult and flat, this kind of as timber or fibreglass.
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