Pauza

Because fuck you, Universe

Deus Ex Human Revolution

"Who we are is but a stepping stone to what we can become".

"It's a time of great innovation. And technological advancement. It's also a time of chaos, and conspiracy...".

"These people, Adam... they're like ghosts; always in the shadows, always hiding behind lies..."

"Corporations have more power than the government. Everyone's fighting for power, for control".

"The body may heal but the mind is not always so resilient".

Pentru mine, alaturi de Diablo 3, acest joc este cel mai asteptat al anului 2011 si probabil al intregului deceniu 2011-2020.
Evenimentele au loc inainte de intamplarile din primul Deus Ex, cand umanitatea intra in contact cu prima forma de implementare biologica a conceputului de transumanism. Nanoaugmentarea. Un cyberpunk de exceptie, abia astept sa-i savurez complexitatea tehnologico-filosofica.

PS: imi place piesa din fundal.

Cum se rezolva o ecuatie diferentiala omogena de gradul 2

Punctaj: 15/15. Metoda folosita: derivata de ordinul 1 a metodei coeficientilor constanti (Lagrange). Daca vreti sa fiti clasici si plictisitori: primitiva. (click pentru a mari)

Women

Si ceva peste care am dat acum ceva vreme...

Physical theories as women
By Simon Dedeo

0. Newtonian gravity is your high-school girlfriend. As your first encounter with physics, she's amazing. You will never forget Newtonian gravity, even if you're not in touch very much anymore.

1. Electrodynamics is your college girlfriend. Pretty complex, you probably won't date long enough to really understand her.

2. Special relativity is the girl you meet at the dorm party while you're dating electrodynamics. You make out. It's not really cheating because it's not like you call her back. But you have a sneaking suspicion she knows electrodynamics and told her everything.

3. Quantum mechanics is the girl you meet at the poetry reading. Everyone thinks she's really interesting and people you don't know are obsessed about her. You go out. It turns out that she's pretty complicated and has some issues. Later, after you've broken up, you wonder if her aura of mystery is actually just confusion.

4. General relativity is your high-school girlfriend all grown up. Man, she is amazing. You sort of regret not keeping in touch. She hates quantum mechanics for obscure reasons.

5. Quantum field theory is from overseas, but she doesn't really have an accent. You fall deeply in love, but she treats you horribly. You are pretty sure she's fooling around with half of your friends, but you don't care. You know it will end badly.

6. Cosmology is the girl that doesn't really date, but has lots of hot friends. Some people date cosmology just to hang out with her friends.

7. Analytical classical mechanics is a bit older, and knows stuff you don't.

8. String theory is off in her own little world. She is either profound or insane. If you start dating, you never see your friends anymore. It's just string theory, 24/7.

Your argument is invalid

The mathematical theory of big game hunting


1. Mathematical methods

1. The Hilbert, or axiomatic, method. We place a locked cage onto a given point in the desert. After that we introduce the following logical system:
Axiom I. The set of lions in the Sahara is not empty.
Axiom II. If there exists a lion in the Sahara, then there exists a lion in the cage.
Rule of procedure. If P is a theorem, and if the following is holds: "P implies Q", then Q is a theorem.
Theorem 1. There exists a lion in the cage.
2. The method of inversive geometry. We place a spherical cage in the desert, enter it and lock it from inside. We then perform an inversion with respect to the cage. Then the lion is inside the cage, and we are outside.
3. The method of projective geometry. Without loss of generality, we can view the desert as a plane. We project the surface onto a line, and then project the line onto an interior point of the cage. Thereby the lion is projected onto that same point.
4. The Bolzano-Weierstrass method. Divide the desert by a line running from N-S. The lion is then either in the E portion or in the W portion; let us assume him to be in the W portion. Bisect this portion by a line running from E-W. The lion is either in the N portion or in the S portion; let us assume him to be in the N portion. We continue this process indefinitely, constructing a sufficiently strong fence about the chosen portion at each step. The diameter of the chosen portions approaches zero, so that the lion ultimately surrounded by a fence of arbitrarily small perimeter.
5. The "Mengentheoretisch" method. We observe that the desert is a separable space. It therefore contains an enumerable dense set of points, from which can be extracted a sequence having the lion as limit. We then approach the lion stealthily along this sequence, bearing with us suitable equipment.
6. The Peano method. Construct, by standard methods, a continuous curve passing through every point of the desert. It has been remarked [1]that it is possible to traverse such a curve in an arbitrarily short time. Armed with a spear, we traverse the curve in a time shorter than that in which a lion to move a distance equal to its own length.
7. A topological method. We observe that a lion has at least the connectivity of a torus. We transport the desert into four-space. Then it is possible [2] to carry out such a deformation that the lion can be returned to three-space in a knotted condition. He is then completely helpless.
8. The Cauchy, for function theoretical, method. We examine a lion-valued function f(z). Let ζ be the cage. Consider the integral

where C represents the boundary of the desert. Its value is f(ζ), i.e. there is a lion in the cage [3].
9. The Wiener-Tauberian method. We obtain a tame lion, L0, from the class L(-¥, ¥), whose Fourier transform vanishes nowhere, and release it in the desert. L0 then converges toward our cage. By Wiener's General Tauberian Theorem [4], any other lion, L (say), will converge to the same cage. Alternatively we can approximate arbitrarily closely to L by translating L0 through the desert [5].)
10. The Eratosthenian method. Enumerate all the objects in the desert. Examine them one by one, and discard all those that are not lions. A refinement will capture only prime lions.
2. Methods from theoretical physics

11. The Dirac method. We observe that wild lions are, ipso facto, not be observable in the Sahara desert. Consequently, if there are any lions at all in the Sahara, they are tame. We leave catching a tame lion as an exercise to the reader.
12. The Schroedinger method. At any given moment there is a positive probability that there is a lion in the cage. Sit down and wait.
13. The nuclear physics method. Place a tame lion into the cage, and apply a Majorana exchange operator [6] on it and a wild lion.
As a variant, let us suppose, to fix ideas, that we require a male lion. We place a tame lioness into the cage, and apply the Heisenberg exchange operator [7] which exchanges spins.
14. A relativistic method. We distribute about the deser lion bait containing large portions of the Companion of Sirius. When enough bait has been taken, we project a beam of light across the desert. This will bend right around the lion, who will hen become so dizzy that he can be approahced with impunity.
3. Experimental physics methods

15. The thermodynamics method. We construct a semi-permeable membrane, permeable to everything except lions, and sweep it across the desert.
16. The atom-splitting method. We irradiate the desert with slow neutrons. The lion becomes radioactive, and a process of disintegration set in. When the decay has proceeded sufficiently far, he will become incapable of showing fight.
17. The magneto-optical method. We plant a large lenticular bed of catnip (Nepeta cataria), whose axis lies along the direction of the horizontal component of the earth's magnetic field, and place a cage at one of its foci. We distribute over the desert large quantities of magnetized spinach (Spinacia oleracea), which, as is well known, has a high ferric content. The spinach is eaten by herbivorous denizens of the desert, which in turn are eaten by lions. The lions are then oriented parallel to the earth's magnetic field, and the resulting beam of lions is focus by the catnip upon the cage.

Omegle si geometria non-euclidiana

Tocmai mi-am consumat ultimele 3 ore discutand cu "straini absolut" pe chestia asta interesanta numita Omegle. A fost chiar mai placut decat ma asteptam. Iata logul unei discutii pe care am avut-o:

You're now chatting with a random stranger. Say hi!

Stranger: why?

You: Because you can't handle it.

Stranger: :(

Stranger: you make me sad and happy inside

Stranger: thanks :(

You: I'm like Intel.

Stranger: yay

Stranger: intel for the.. lose

You: Just that I'm outside.

Stranger: oh...

Stranger: why?

Stranger: your outside..

Stranger: why..

Stranger: its cold!

You: No, I mean metaphysically.

Stranger: no shit

You: Yeah.

You: What's up ?

Stranger: or is it shit?

Stranger: ponder that question

Stranger: the sky

You: I don't know, I guess depends on religion.

Stranger: ?

Stranger: how are you?

You: I'm good.

You: And you ?

Stranger: pretty good

Stranger: ok

Stranger: lemme try and guess you

You: Go ahead.

Stranger: hmmm

Stranger: m 20+ (usa/canada/england)

Stranger: im sure one of them will be right

You: 22, actually.

Stranger: unless your a f 10 from china

Stranger: 20+

Stranger: all right?

You: No, I;m a guy.

Stranger: 2 right

You: Yeh.

Stranger: and the end

Stranger: ?

You: No, none of those countries.

Stranger: dammit..

Stranger: which one?

You: Yeah.

You: You scored low today.

Stranger: 2 right..

Stranger: pretty good?

Stranger: country is harder though

You: Yes.

Stranger: gender is out of 2 (suprisingly)

Stranger: which country you from?

You: Romania.

Stranger: cool

Stranger: would have took me along time to guess

You: What about you.

You: Yep.

Stranger: do you wanna guess

Stranger: or shall i just say?

You: I'

You: I'll guess.

You: After we speak a while.

You: So tell me about your day.

Stranger: ok

Stranger: my day

Stranger: it was ok

You: What life changing revelations did you have today ?

Stranger: i found a dead frog

You: Interesting.

Stranger: was pretty life changing

You: You know suffering is the first of the 4 noble truths.

Stranger: :(

Stranger: i know

You: HAve you thought of suffering ?

Stranger: damn noble truths

You: When you saw the frog.

Stranger: when you say suffering

Stranger: do you mean suffering things?

Stranger: or my suffering?

You: Suffering in general.

Stranger: or other peoples/things suffering

Stranger: abit

You: The feeling of suffering.

Stranger: it was quite horrible

Stranger: i mean

Stranger: a cat attacked it

Stranger: and left it

You: Did you saw the whole thing ?

You: *see

Stranger: yes..

You: Sorry, It's 1 AM here.

You: Did you have a good day besides the dead frog ?

Stranger: yeah

Stranger: 1am?

Stranger: its...

Stranger: damn

Stranger: cannot reveal

Stranger: its 5am?

Stranger: or maby 5pm

You: 1 AM is 1 in the night.

You: Or at night.

Stranger: yes

Stranger: wanna guess yet?

You: It's Monday here already.

Stranger: :o

Stranger: already.

Stranger: nooo!

Stranger: you better get sleep?

You: No, I;m good.

You: Don't work.

You: Only got school.

Stranger: ok..

Stranger: cool

Stranger: what do you do at school

You: And today I'm free.

Stranger: what do you study?

You: Applied Physics.

You: Do you study anything ?

Stranger: yes

Stranger: i mean

Stranger: dam..

Stranger: age slightly revealed

Stranger: not that my grammar and typing will show it anyway

Stranger: i do maths physics biology and chemistry

You: So you're in highschool.

Stranger: pretty much

Stranger: come on

You: Or coming out of it.

Stranger: i had hardly any clues

Stranger: how many do you want

Stranger: yes im in highschool

Stranger: (we call it college here in ......)

You: And you study natural sciences.

Stranger: not really

You: We call it highscool until age 18.

Stranger: we had the choice of 4 subjects

You: And faculty after 18.

Stranger: and i choose these

You: You must live in a Western country.

You: If your educational system allowed you to choose.

Stranger: we call it secondary school 11-16 college 16-18 university 18+

Stranger: indeed

You: I see.

Stranger: you didnt get to choose after highschool

Stranger: ?

You: I did.

You: There's general school until 15.

You: Highschool from 15 to 18.

You: And faculty/university after.

Stranger: closeish to ours then

You: There are predefined profiles that you can choose in highschool.

Stranger: whats applied physics like?

You: Applied Physics is quite a nice domain.

Stranger: what are the things you do?

Stranger: just a general idea please

You: Somewhat opposed to Theoretical Physics but intertwined with it nonetheless.

You: Well...

You: I study all Physics.

You: Starting from Mechanics.

Stranger: so its not "what would happen if i was going near the speed of light with a mirror infront of myself/threw a rock/shined a light"

You: Thermodynamics, Electricity and Magnetism, Statistical Physics, Quantum Physics, Nuclear Physics etc...

Stranger: cool

Stranger: i plan to do physics at university

You: Relativity is only a small part of Physics.

Stranger: i know it is

Stranger: im just saying

Stranger: as an example

You: We don;t really deal with it extensively.

Stranger: i cant give an example to everything

You: But it's useful for astrophysics yeah.

Stranger: it doesnt really go with the applied bit does it.

You: Well relativity is really pronounced at large scales and high speeds.

You: Of course there is need for it.

Stranger: i know

Stranger: but ..

Stranger: oh never mind

You: When dealing with subatomic Physics, involving relativistic speeds.

You: Our focus is on engineering.

You: Optoelectronics, lasers, environmental Phnysics...

Stranger: i know it is needed , but at the moment it isnt really relivent to alot of people in the way engineering and other things are

You: Yes, it's not that practical to use in real life situations.

Stranger: unlesss for some reason we go to near speeds of light

You: Though some parts of it are used in space travel and even airport traffic for example.

Stranger: then im not sure it really matters, because we will see anyway

Stranger: if we die

Stranger: airport traffic

You: Like non-euclidian mathematics.

You: Yes.

Stranger: relativity?

Stranger: whats euclidian?

You: It's hard to explain.

You: Euclid was a mathematician who proposed a few geometrical axioms.

You: In the hypothesis that space is "straight".

You: But in reality, space is curved around objects with large masses, as relativity shows.

Stranger: i see what you mean now

You: And for example, in a euclidian space, two parallel lines never meet when they are extended to infinity.

Stranger: aha

Stranger: and they do?

You: Well in reality, there is no such thing as line parallelism because there is no such thing as a straight ine.

Stranger: well yeah i know. but at basic levels

You: The shortest distance between two objects is not a line, but a curve.

Stranger: a curve?

You: And this becomes more pregnant as we approach large masses, or a higher curvature of space.

Stranger: is it?

Stranger: can you explain or is too detailed?

You: Yes, but at our scale, we can safely assume it's a line.

You: Well, think of 2 points on the surface of a sphere.

Stranger: is that at large scale or small scale?

You: And try to connect them with a straight line.

Stranger: because we dont know the shape of the universe?

You: You will see that the line forming a cord in a circle that cuts that transverses the sphere is actually longer than the circumference of the arc between the points.

Stranger: sorry im just trying to simplyfy it to my terms, because you are a hell of alot smarter than i am

You: A circle that transverses the sphere.

You: Sorry.

You: As in it cuts the sphere in two.

Stranger: no prob

Stranger: a hah...

You: So you would travel a shorter distance if you were to just walk along that arc.

You: Than to go in a straight line.

Stranger: i understand now

You: This is what non-euclidian geometry is all about.

Stranger: so does this apply to large scale?

Stranger: or small?

You: Yes, of course.

You: At large scales, where curvature is greater.

You: Think of the curvature of Earth.

You: Or any other large mass object.

Stranger: but if were in space and just say we wanted to go to another point a great distance apart

Stranger: would we know which way would be the best?

You: This is due to the fact that, as Einstein predicted and then showed, an object with mass creates a hole in the space-time fabric.

Stranger: fastest*

You: Well not really a hole, but just bends it, you know what I mean.

Stranger: i know

Stranger: like an example is a sheet held out

Stranger: with balls placed in

You: Yes, or a piece of elastic fib er.

Stranger: is that sort of a good example?

You: The elastic fiber is better.

Stranger: oh well

You: Because gravity is a force of attraction.

Stranger: its an elastic sheet

You: So when the object, say a star, becomes lighter, gravity starts to push on it.

You: And if the push of the gravity is great enough, it can "Gravitationally collapse" it.

You: And create what is called a blackhole.

Stranger: :O

Stranger: so what is in the centre of a black hole?

Stranger: just condensed matter

You: No one actually knows.

You: Yes, it seems that blackholes even emit radiation.

You: As Hawking showed it, I think.

Your conversational partner has disconnected.

I rest my case

Back

Am avut niste dificultati tehnice privind contul meu pe gmail. Din fericire s-au rezolvat si am reusit sa reintru pe blog. Voi fi putin ocupat cu scoala in perioada asta dar mai arunc cate-o fila si pe aici din cand in cand.

Tabel de etalonare

Accept the mystery

Ieri am terminat de vazut "A Serious Man", un film de fratii Coen. Ce m-a atras initial a fost ideea filmului, un profesor evreu de fizica are o criza de viata. Am fost oarecum dezamagit de incertitudinile care apareau in film, multe lucruri se termina brusc, inclusiv finalul. Si pare ca nimic nu are vreun... sens. Cauze necunoscute, un Univers aleator sau un Dumnezeu razbunator ? Cred ca asta e si ideea filmului. Incertitudinea; poate fi oricare din aceste lucruri. De fapt, sunt destul de convins ca despre asta e vorba, de-a lungul filmului exista indicii: pisica lui Schrodinger, demonstratia principiului lui Heisenberg pe care le-o face studentilor, dilema de la inceputul filmului (daca vizitatorul e sau nu un demon), goana sa dupa raspunsuri la cauzele care i-au destramat casnicia (rabinii), confruntarile sale morale ridicate de problema trecerii studentului strain... E o diferenta intre incertitudine si caracter aleatoriu. Mintile noastre sunt in contradictie cu universul din punctul asta de vedere. Starea universului tinde catre haos, catre o dezordine cat mai mare: daca reusesti sa creezi ordine intr-o parte (sa reduci entropia unui sistem local), aceasta ordine este compensata de cresterea entropiei in alta parte si astfel echilibrul se pastreaza. Dar mintea umana e diferita, ea tinde catre ordine, catre indepartarea haosului, a confuziilor, catre gasirea de raspunsuri. Suntem parca presetati sa fim diferiti de "ordinea fireasca a lucrurilor". Si aceasta impotrivire duce doar la crearea unui haos si mai mare intocmai cum un sistem care se indreapta spre echilibru termodinamic creeaza dezordine (teoria racirii Universului), fiindca de fapt tot ce incercam sa facem e sa ajungem la un echilibru cu noi insusi, cu lumea din jur, sa ne solutionam problemele... sa fim fericiti.
Eram confuz de ce acest film fusese nominalizat la Oscar, finalul filmului m-a lasat cu gura pe jumatate cascata pe jumatate pe cale sa scoata o injuratura fiindca nu intelegeam. Asa ca, m-am culcat. Astazi m-am trezit si am realizat ca filmul imi prezenta subtil toate aspectele prin care trec. Era mai mult despre mine. De ce nu pot sti ce gandesc altii ? De ce nu pot sti ce vreau ? De ce mi se intampla toate rahaturile cand eu incerc sa fiu ok cu toata lumea ? E o ironie a sortii sau doar o coincidenta ? De fapt, e un film despre vietile tuturor. Nu e nicio confuzie in film, el nu ofera solutii, el doar prezinta si ne lasa sa interpretam, sa ne intrebam. Cam ca si in viata. Viata se deruleaza indiferent de cate raspunsuri gasesti, si adesea un raspuns naste mai multe confuzii si intrebari. Schimbarea este singura constanta in viata. Suntem obisnuiti sa intelegem ca atunci cand se intampla ceva, trebuie sa existe o cauza determinabila care a dus la acel lucru, si daca identificam acea cauza, putem solutiona problema, si putem preveni aparitia ei in viitor. Asta nu e mereu adevarat. Daca ar fi asa, ne-am putea gandi ca am putea prezice viitorul, dupa spusele lui Lagrange, daca am avea suficienta putere de calcul pentru a vedea cum evolueaza in timp sistemele, cunoscand starea la un moment initial. Dar natura are acest mecanism, acest copyright pe care nu-l poti "crackui". Incertitudinea. Nu poti sti un lucru cu precizie 100%. Dar asta nu inseamna ca "totul e relativ" (adesea inteles ca "totul e subiectiv" - si atunci lumea crede ca in pofida acestui fals truism poate sa afirme orice si sa se bazeze pe relativitatea adevarului ca argument in sustinerea prostiei pe care a spus-o). Inseamna doar ca exista o limita a ceea ce poti acoperi la un moment dat, o limita peste care nu poti sa treci.
Per total, pot spune ca filmul a fost "meh". Mi-a reamintit de aceasta limita si mi-a sugerat sa mai tai din acceleratie. In fine, cred ca ma intorc la (meta)materialele mele.

Procrastilaxing - when you're not making sh!t happen, enjoy the ride

pro·cras·ti·nate (pr-krst-nt, pr-)

v. pro·cras·ti·nat·ed, pro·cras·ti·nat·ing, pro·cras·ti·nates

v.intr.

To put off doing something, especially out of habitual carelessness or laziness.

v.tr.

To postpone or delay needlessly.

Respectiv...

re·lax (r-lks)

v. re·laxed, re·lax·ing, re·lax·es

v.tr.

1. To make lax or loose: relax one's grip.

2. To make less severe or strict: relax a curfew.

3. To reduce in intensity; slacken: relax one's efforts.

4. To relieve from tension or strain: The warm bath relaxed me.

v.intr.

1. To take one's ease; rest.

2. To become lax or loose.

3. To become less severe or strict.

4. To become less restrained or tense.

...constituie starea pe care o am de vreo 5 zile. Cum morti sa faci o carte si sa nu notezi paginile capitolelor in cuprins ?! Reforma in invatamant nu exista, e aceeasi forma, acelasi rahat in fiecare generatie, expandat prin noi tehnici. Studentii de la psihiatrie ar trebui sa faca practica in scolile romanesti, pacienti vii (majoritatea, altii sunt atat de obositi ca nici nu mai are sens sa te chinui) la tot pasul. Ce pot sa mai zic, n-am chef de nimic, scoala sau alte rahaturi. Sa fiu al naibii daca nu-mi strang bani si plec intr-o vacanta pe o plaja exotica. De luni intregi am visul asta erotic. Culcat pe un sezlong pe plaja, o masuta cu gadgeturi/carti in stanga, o umbrela deasupra si eu lafait pe spate cu un cocktail in mana. Sa stau si sa stau.
Nimic nu mai iese cum vreau, cum pisici am ajuns sa depind de starea altora nu-mi dau seama. Vrei sa faci ceva, sa creezi ceva, si ai prins acel "momentum" specific starilor in care simti ca te desprinzi de ... lehamite, tocmai cand ai crezut ca in sfarsit ti-ai scos capul de sub rahat, destinul iti mai tranteste o lopata de porcarii in fata. Cu una-ti da, cu cealalta-ti ia. Si cred ca tocmai am devenit ceea ce uram tot timpul. Un obosit. Un scarbit, de tot. De LENE. Dar nu lene de aia ca nu-ti vine sa incepi un proiect sau sa te duci la munca. Nu, o lene de aia care te atinge in latura umana, care iti blocheaza caile de comunicare cu ceilalti. E suprasaturatie de sentimente, de trairi. Postmodernismul suge rau. Oboseste oamenii; azi la metrou am avut o scurta revelatie, de vreo 15 secunde (si nu vorbesc de momentul in care ea m-a ciupit de brat si m-am intors si am vazut-o surprins si am tampit pe loc, tacand incercand sa nu par prea surprins). E genul de revelatie stupida pe care incearca sa o transmita unele filme, un semnal de alarma pe care vor sa-l traga asupra directiei in care se indreapta societatea de zapaciti hipertensivi si fast-fooderisti (da, am licenta sa inventez cuvinte, e blogul meu) obositi de ritmul de alerta creat de corporatiile care urmaresc sa-si umple toate orificiile cu bani. Totul e BANI, alergi ca zapacitul sa prinzi autobuzul, te impiedici, iti rupi gatul, cazi peste gaina altuia, musti o bucata dintr-un stalp, iti mai pica si pantalonii, te mai injura soferii ca ai indraznit sa o iei printre masinile stationate la semafor, alta cuanta de "energie negativa" avandu-te ca tinta, pierzi un telefon de la iubita/mama/sora/catelul -adio voce familiara pentru urmatoarele 8 ore, te zapacesti la un loc de munca in care esti un SCLAV al banului; nu inveti nimic, nu progresezi - cum naiba sa spui ca ai PROMOVAT la serviciu cand ti se da un salariu mai mare - alergi si mai mult, mananci si mai multe saorme/fornetti/chipsuri/hamburgeri si alte fast-fooduri, iti ramane timp si mai putin sa faci prostiile care te fac fericit, care de fapt nu-s prostii.
Si vazand unde o sa ajung in cativa ani, pai sa nu-ti bagi ceva in tot ?

The not so rising lightning

As fi spus aici ca imi redeschid blogul, dar asta nu e o redeschidere. Cel mai probabil, blogul va lua alta directie decat cel vechi, cunoscatorii stiu. Nu stiu despre ce sa scriu aici, in primul post, perioada asta demotivanta isi cam lasa amprenta si cauzele nu sunt siderale desi imi place sa creez o contingenta intre Univers si stari. Ma bucur ca exista fulgere si furtuni. Cateva fotografii fulgeristice. Recomand vizionarea lor alaturi de auditii corespunzatoare. Pozele sunt furate de aici.