Месяц: Июль 2018

Отличнейшие видеоуроки по основам электроники.

https://www.youtube.com/watch?v=GCWqQID6kw8&list=PL_2PkT1Qd7H-yLV_8OMhKbwsoclr13Umk&index=1

https://www.youtube.com/watch?v=GCWqQID6kw8&list=PL_2PkT1Qd7H-yLV_8OMhKbwsoclr13Umk&index=1

Free Online Electronic Circuit Emulator. Seems to be the only one on the Internet, all others are not free. There’s a library of ready-to-go circuits. You can play around with different parameters and see how they affect the circuit.

http://www.falstad.com/circuit/circuitjs.html

http://www.falstad.com/circuit/circuitjs.html

I learned an interesting example from the game theory. A man dies, leaving debts totalling more than his estate. should the estate be divided among the creditors? Let’s take three wives, the debts are 100, 200, and 300. And there are three cases corresponding to estates of 100, 200,

and 300. The hebrew’s Mishna stipulates the divisions shown in the picture attached to this post, and this solution is very interesting. For 100, it is an equal division: each wife will get 33 1/3. For 300, it is an proportional divison, first one will get 50, second wil take 100, and the third will receive 150. But what is for the second case? (50, 75, 75)?

Auman and Mashler found a solution via pre-nucleolus. Of course, Tora doesn’t say about that. However, it has an interesting principle of divisions illustrated by another Mishna, “Two hold a garment; one claims it all, the other claims half. Then the one is awarded 3/4, the other 1/4.”. The principle is clear. The lesser claimant concedes half the garment to the greater one. It is only the remaining half that is at issue; this remaining half is therefore divided equally. Note that this is quite different from proportional division.

Your claim is 100, right? Take 50 and go.

By the way, it is a great tactics for bargaining or business negotiations: try to ask more than you expect to get without

a fight.

It explains 50/75/75 in the second line of the table attached. Each wife requires 100 at least, and the estate costs 100 too, so for this case, an equal division works well. If the estate costs 200, first wife gets 50% of what she claims, and other wives will receive the same amount at least, totally 50+50+50=150. We have 200, so 200-150 will be split between wives. Not equally, first 25 is a half of (50% of what she claims, 0.5*200=100) and (what she get, it is 50), that is 75. The third wife takes 75 too, as a reminder.

The third case, 300, has the same logic. If you give all 100 to the first wife, it is unfair, because 2nd and 3rd won’t take their 200 and 300. So first wive will take 50, all other will take 50 as well, totally 150. The reminder is 300-150=150. The second wife wants 200, the half of this is 100, and she has already received 50. If we add 50 to the first 50, we’ll give 100 to her, which is 50% of what she expects, and the reminder will go to the third wife.

The detailed paper is here: http://www.cs.cmu.edu/~arielpro/15896s15/docs/paper8.pdf

Thanks, Mathew, for the first 35mm film photo of me) I haven’t seen anything like that for fifteen years or so 🙂 Retro, vintage and old school in all their glory!

Режиссер – Илья Найшуллер. Вы знали?

http://resprod.ru/post_industry/weekndgoespostal/

https://www.youtube.com/watch?v=CW5oGRx9CLM

Собрал в образовательных целях гуделку на трёх операционных усилителях. С первого идёт пищание 4кГц , со второго – гудение 215 Гц. Оба сигнала поступают на вход третьего операционника, который гудит смешанным сигналом (на осциллографе его видно).

Очень интересная популярная лекция про коллайдер, строение атома, частицы, открытия бозона Хиггса и т.д. от Гарри Клиффа. Очень рекомендую интересующимся.

https://www.youtube.com/watch?v=edvdzh9Pggg

https://www.youtube.com/watch?v=edvdzh9Pggg

Роботы заменяют людей)

Ушел в душ на минуту раньше будильника на айфоне. Так эта сволочь сама затыкается только через 15 минут. И это время нельзя поменять! Бедные соседи

Кстати, скорее всего, сработает вот такой хак для того, чтобы человек не услышал будильник – позвонить ровно в момент будильника и бросить трубку сразу после соединения. Телефон успеет сказать “а”, но в первую же секунду заткнется, как и будильник. Особенно это будет работать круто с мелодией будильника, начинающейся с тихих звуков.