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30 Jun

https://soulofmatter.wordpress.com/2015/06/30/the-return-of-the-cicadas-or-life-with-a-purpose/

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Edward Leedskalnin

24 Mar

Edward Leedskalnin was born in January 12, 1887, in Livonia and died in December 7, 1951, in Miami. The story of this excentric amateur sculptor is outstanding because he single-handedly built the monument known as Coral Castle, located in Homestead, Florida.

The story of Leedskalnin impress anyone, because this immigrant arrived in the USA with a terminal illness. But in fact, his disease was cured and the man was capable, in the next thirty years, building itself and in the evening, the work of his life, Coral Rock. Ledskalnin worked at night and when he sensed someone lurking nearby, he just interrupt his work, retreating into the house. When asked how he did it, he simply replied “I know the secret of the Great Pyramids” …[1] In fact, he learned from his grandfather, a mason, the art of construction,

Leedskalnin in the middle of his Coral Castle. Amazing single-handed construction by a man weighing about 50 kg...

Coral Castle is a complex composed of multi-ton stones and coral rock, entirely built by Leedskalnin, a 5 feet tall, 100 lb man .
But, notwithstanding all the speculations about the “science” behind Leedskalnin achievement, maybe all techniques were simple, as suggested in this next video, teaching how to raise multi-ton stones, like in Stonehenge megalitic monument.

He knew the art of construction in a manner which is now lost. He brought to Coral Rock about 1100 tons of coral rock and stone. With its tripod-shaped lever, he lifted and placed side by side, or one above the other, a set of stones, with a precision that emulates the Great Pyramids. Fantasy or not, he said he knew a technique for lifting stones that was revolutionary, and his book “Magnetic Current” was the notebook where he recorded his “secret.” [2] His tools were the tripod, saws, iron wedges, block and tackles, winches and a wheelbarrow, all materials he bought in a nearby scrap iron seller.

I give here some input from my reading of his manuscript “Magnetic Current”, to be updated as my reading and understanding is progressing, see page below:

Personal notes about Leedskalnin "Magnetic currents".

Coral Rock is the inspiration of a broken engagement, a masterpiece of love. The wedding was planned to take place in Riga, with the sixteen years old girl, Agnes Scuffs. Leedskalnin told that Agnes never married him because he lacked monney, but the other side told a different story, that Edward was opiniated, and obssessed with controlling her, and also probably it played against him the ten years age difference. Edward always referred to her, as the «Sweet Sixteen», and built Coral Rock to be his Taj-Maal of love, his temple of love, where he expected to live with Agnes and raise their children [3].

Billy Idol composed a song that later become famous in the pop culture, “sweet sixteen”, watch below.

To have a notion of the difficulties to built big structures with rocks, read this book [4]. And if you, too, have a broken heart, you can always try to impress your loved one by learning the “secret” of Edward Leedskalnin, and build your majestic Taj-Maal…

REFERENCES:

[1] Coral Castle: The Story of Ed Leedskalnin and His American Stonehenge, by Rusty McClure,Jack Heffron

[2] Magnetic Current, by Edward Leedskalnin
[3] American Folk Art: A Regional Reference, by Kristin G. Congdon,Kara Kelley Hallmark

[4] The Complete Guide toi Building with Rocks & Stones: Stonework Projects and…, by Brenda Flynn

Superconductivity and its applications

15 Mar

“If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generations of creatures, what statement would contain the most information in the fewest words? I believe it is that…all things are made of atoms.”
Richard P. Feynman, winner of the 1965 Nobel Prize in Physics

PART 1

History

The idea of the absolute zero of temperature was advanced by J. A. C. Charles and J. L. Gay-Lussac (Fig.1). In fact, they have shown that by extrapolating their measurements of the volume of any gas as a function of the temperature (at constant pressure), their volume would tends toward a zero value at a temperature near -273 degree Celsius (see fig.2).

Gay-Lussac. Image credits: chemistryland.com

By extrapolation of the curve of volume versus temperature, Charles and Gay-Lussac predicted the existence of the absolute zero. Im. credit: chempaths.chemeddl.org

In 1911, Kamerlingh Onnes discovered that mercury suddenly lose its resisitivity  when the temperature dropped to -260 degree Celsius. Omnes started investigating the field of low-temperature physics in 1908, when he succeeded in liquifying helium. Whith these findings we may say that the field of superconductivity is open, bringing to us the compreension of astounding phenomena, characterized by the manifestation of the wave nature of particles at a macroscopic scale.

It is not always fundamental to reduce friction to put the body at zero degrees Kelvin. In fact, russian scientists succeeded that achievement with a simple experiment. They launched a sphere of steel on a surface made of molybdenium and sulphur, while at the same time thay beam a cloud of electrons on the surface. They observe a strong reduction of friction from a coefficient 0.9 to 0.0015!

Fundamental Properties of Superconductors
superconducting or superfluid phase is considered a different thermodynamical phase when compared to the normal state that exists when the temperature T>T_c, where T_c means the critical temperature below which the superconducting or superfuid state appears. For example, liquid 4He under its vapor pressure becomes superfluid at T_c=2.17 K. So, the passage from one state to the other is called a phase transition, and it is accompanied by a strong increase of the specifi heat when the temperature is near T_c, with a strong release of entropy. This phenomena, experimentally seen, leads to the formation of a more ordered state of matter (see also precedent video). Fundamentally, a superconductor is a conductor that has undergone a phase transition to a lower energy state below the critical temperature T_c, characterized by the appearance of groups of paired electrons, the so called Cooper pairs, carrying electrical current without any resistance and responsible, among other properties, of perfect diamagnetism.

We may distinguish two types of superconductors. A Type I supercondcutor, is characterized by the following properties [1]:

  • zero electrical resistance and perfect diamagnetism at a temperature below T_c. Normally, at temperatures above T_c this material is a normal metal, although not a very good conductor;
  • perfect diamagnetism, also called Meissner effect, the magnetic field stays outside the material, cann’t penetrate the material. Curiosly enough, if you appply an external magnetic field  B_app above a given critial magnetic field, B_c, the material suffers a transition from superconductor to normal state. An approximate functional dependence on temperature for this critical magnetic field is given by

And what is the diamagnetic property of matter? This property  is a kind of negative magnetism. This effect was studied in the framework of  classical mechanical by Paul Langevin in 1905 [2], using previous and revolutionary ideas proposed formerly by André-Marie Ampère[3]  and Wilhelm Weber [4] (nowadays we barely talk about these two great men of science that really use their minds for the advancement of science and the progress of mankind…). Langevin found, in the classic framework provided by Ampère and Weber, that N electrons moving in orbits around the nucleus at an average distance <r²>, such that the (constant and negative) magnetic susceptibility χ is given by

The magnetic susceptibility is the ratio of M/H, where M is the magnetization field and H the magnetic field. The susceptibility χ is slightly negative for diamagnets, but acquires small positive values for paramagnetic substances (e.g., ), and is strongly positive for ferromagnetics substances (e.g., Fe). It can be shown that a material constitute of paramagnetic ions with magnetic moment μ, obeys the Curie-Weiss law:

where n means the concentration of paramagnetic ions, Θ is the Curie-Weiss constant () . when perfect diamagnetism is achieved, χ=-1, that is, the magnetization M is directed opposite to the H field, cancelling it, M=-H. For example, when a superconductor with spherical form is placed nearby the poles of a magnet, it results a superposition of the applied magnetic field B_app, and the resulting dipole field (Fig.1a) , giving a curvature of the magnetic field lines of the form as shown in Fig.1b.

The dipole result when a uniform permanent magnetization M is parallel to the axis Oz (see Section 5.10 in the textbook of J. D. Jackson [4]).

Besides perfect diamagnetism, the other important property of the superconducting state is its zero resistance. In ideal conditions, an electric current established in a loop of supercuncting wire will last indefenitely. The surface resistance of the material with a current flowing along a film of thickness d, must satisfy the condition

where ρ is the electric resistivity, h is the Planck constant and e is the absolute charge of the electron.

Methods of Quantum field Theory

In quantum field theory (QFT), the Lagrangian plays a central role in working out mathematically the physical problems and from which the dynamic field equations are generated. In the Hamiltonian formulation of classical mechanics, the equations of motion of a system of particles can be obtained from a special function called the Action. Usually, the Lagrangian is dependent on the positions and velocities of the particles:

Hamilton’s minimum action principle states that Nature prefer to follow movements that  extremize this quantity called action.

In QFT, this formulation can be translated, replacing que classical quantities by a “field”, in the manner of the Table 1 below:

In field theory, the fields φ(x,t) play the role of the generalized coordinates, {qi(t)}, where the discrete index i represents the number of discrete coordinates of the system. In local field theories the Lagrangian may be written as an integral over another function called the Lagrangian density, L, such as

depending on the set of a possible fields present on the given point of space and their first derivatives:

When seeking to extremize the functional called Action, it is obtained the so called Euler-Lagrange equations for any field:The Fig. below represents several possible “trajectories”, or “stories” associated to a given dynamical field. But Nature prefer only one of them, the one “story” which is represented by the above Euler-Lagrange equations…

As written by Pierre Fermat in a letter of 1662 to M. de la Chambre:

Natura operatur per modos faciliores et expeditiones (Nature works by the easiest and readiest means).

Various possible "stories" that a physical system may undergo. However, Nature prefer the one that extremize the Action.

Maupertius argued that the principle of least action (was the first to enunciate it), showed the wisdom of the Creator. Maupertuis believed that the vis viva (which today is twice the kinetic energy) should be minimal.}: “ The action is proportional to the product of mass and velocity and space. Now here this principle, so wise, so worthy of the Supreme Being: once a change occurs in nature, the amount of action employed for this variation is always as small as possible. ” Pierre Louis Moreau de Maupertuis was a French mathematician and astronomer. Born July 7, 1698 in Saint-Malo and died in the Bale July 27, 1759. Interestingly, he was the son of a pirate.

Let us take as an example (although for non-mathematicians, a little bit too complex problem that can however be grasped as an example of the methods in QFT), the Lagrangian of a physical system composed by matter + electromagnetic field, such as described below, and we will recover essential properties of the superconductor state.
                                                            matter field                                                                             EM field                   Current

PART 2.

To follow

REFERENCES:

[1] Handbook of Superconductivity, Charles P. Poole, Jr. (Academic Press, San Diego, 2000)

[2] Paul Langevin

[3] André-Marie Ampère, Essay sur la Philosophie des Sciences

[4] J. D. Jackson, Classical Electrodynamics

[FN1] Annales de Chimie et Physique, 5 (1905); see paper by Paul Langevin at p.70-127

________________________________________________________________________________

PART 2 – To follow soon…

The Wizard’s Apprentice

1 Nov

Tarkovsky:  “ there is nothing more beautiful and
mysterious than simplicity.”
– Andrei Tarkovsky

Goethe wanted to give us a lesson with his poetic masterpiece «the aprentice of the wizard» written in 1797 (“Der Zauberlehrling” in German). In Johann Wolfgang von Goethe’s poem, the wizard’s assistant try to work out some of the magic acts performed by the wizard, but without to properly control them. Walt Disney parodiate this situation in the 1940 animated movie Fantasia (watch the trailer here) with music by the French composer Paul Abraham Dukas (1865-1935). In his other masterpiece, Faust, he took pratically thirty years of his life writing (uncontinuosly), but every new experience of his life was deeply meditated, wandering into every field of knowledge and, at the end, coming back with sorrow and unsatisfaction, showing to him the eternal problem of the thinker and the various nuances of the social existence of all of us.

The word Magic comes from the Persian language, Magu-sh, name given by the Persian and Medes (people that lived in the area called Media in the actual Iran) to the priests of the religion of Zaratustra (their disciples were called Meghestom), and it was used by Jeremias (Book of) to designate a Babylonian priest. The primitive meaning seems to be “worship of the light” [2]. For the Parsees, the Medes, and Egyptians the term Magic meant a higher knowledge of nature, where religion and astronomy made an integral part of it. The Magi were driven by justice, truth, aiming to preserve their secret wisdom.

Dr. Faustus, Don Giovanni, Frankenstein, like the wizard’s apprentice, they all represent in many ways an archetypal hero who challenge authority and the society (and thus God), in a transgression that represent the eternal tragedy of humanity, seeking dominate nature and the others fellow beings via their seductive and destructive power.

But the judgement of the apprentice (aren’t we all?) is not so simple, because he faces an epistemological crisis about the limits of the human knowledge,  the undecibility (does we have a soul? can we built a robot at our own image? what can we discover investigating the “big questions” beyond the reasonable?…), attaining the «[…] porous boundaries between human and nonhuman, organic and inorganic» [1].

Mozart’s Don Giovanni inspired many artists, composers poets, writers (Byron, Baudelaire, Mérimée, Pushkin, Tolstoi), philosophers,…One of the most famous arias of Don Giovanni is “Il mio tesoro” (“My Treasure”), and I propose you to listen here sang by the famous Irish tenor John McCormack.

Humanity’s greatest strength is his ability for thinking, for sure, and our abstract thought separate us from the animal kingdom in a great measure, althoug in the actuality we are ruled by shameless people…Political scientists (it is not clear to me why they call themselves “scientists”) opened the Pandora’s box, they are in fact apprentices’s of the wizard. They use science to control society for the interest of some groups. Like Pinocchio, we are bound to something, to our creature, and like Pinocchio we have to cut the “strings” that bound us to our Geppettos.

One of the earliest paintings of Leonardo da Vinci, the Adoration of the Magi, is a testimony of the crisis a creative man may came across in his search of the absolute. Leonardo’s tragic destiny  starts to unfold malefic forces around him, with numerous material complications, or possibly he  restrains himself to acomplish the masterpiece, knowing that he already mastered all the techniques. Lorenzo il Magnifico, ruler of the Florentine Republic shows indiference towards Leonardo [Antonina Vallentin, in Leonardo da Vinci] and this hurts him a lot. As the time is running (like the Roman poet Virgilus wrote in his Georgics: Sed fugit interea fugit irreparabile tempus, singula dum capti circumvectamur amore) he fears for not having time to acquire the knowledge he deeply seeks. His pratical side drove him to invent a lot of apparatus intending to give to man the power over nature. Tempus fugit and a sensitive man feels the need to understand fully the how and why we are here…Andrei Tarkovsky, the russian movie director, incorporated motifs of The Adoration of the Magi in the narrative of his movie The Sacrifice (with music of Sebastian Bach Mattheus Passion, listen here), which represents his interpretation of the painting, but in a time reversal way, predicting instead of the bright beginning of humanity, the dark future of Western culture. Science and technology, only by themselves, do not fulfil the humankind needs.

Michelangelo captured the sublime moment of creation in his famous painting of the Sistine Chapel; Adam, with his arm stretched waiting for the finger of God touching, and apparently between man and God there is just an interposed- gap, that’s Michelangelo’s representation of life itself (p. 142, Ref.[1]).

This dramatic situation is well described by Erwin Schrodinger in one of the conferences organized by the Association Eranos, held in Asconna, Switzerland. He criticized the materialistic egotism of natural sciences and that ethics and moral cannot both be dissociated from the scientific research [3]. For the alchemist some knowledge must be kept in secret in order to not fall in the wrong hands, unpreprared politicians and rulers, because then they may serve the evil.The scientific method is certainly powerful, searching the causes of phenomena, analytic and methodic, aiming to formulate the laws that govern phenomena. But it potentiates the materialistic egotism typical of our actual societies, the consumist societies living with the only purpose to consume…

For some this may represent “The End of History” [4]. Science has the only purpose to answer to our “how ?”, not our “why ?”, which is the purpose of philosophy. Philosophy is predominantly synthetic, going from the particular to the general, critic and systematic, searching the «Why?» of these phenomena, their raison d’ être and their value. That ‘s why a world without science AND philosophy is open to tragedy.

REF.

[1] Scott Bukatman, in Beyond the finite: the Sublime in Art and Science, Ed. by Roald Hoffmann, Ian Boyd White p. 129 (OUP, New York, 2011)[2] The History of Magic, by Joseph Ennemoser, Translated from the German by William Howitt Vol I (Henry G. Bohn, London, 1854)[3] Friedrich W. Doucet, in O Livro de Ouro das Ciências Ocultas (Translation to Portuguese)[4] Jean Braudillard, The Illusion of the End (Stanford University Press, Stanford, 1994)

And if the Moon was an alien spaceship?…

28 Jul

We live nowadays in a world controlled by managers, there is not much to be proud about us, humans, humankind falling into slavery, science in downfall, lack of respect and civilisation. Almost nothing good is made easily visible by the media. The media?!…It is a clear lesson what happened recently with Ruport Murdoch media empire, what matters he intended to reinforce and to omit. Notwithstanding the possible existence of God, or at least a God as understood by Baruch Spinoza, let us think for a moment about the hypothesis that the Moon be an alien spaceship, or an old artifact left over by a very advanced alien civilisation, or even more likely why not a remnant from an ancient human civilsation that attained a high level of technical development but was lately destroyed by a global war? After all, old respected texts from India, the Vedas for example, describe ancient wars and spaceships (called Vimaanas in Sanscrit), and also at Mohenjo-Daro was discovered radioactive bodies. Just to cite a few data. The possibility that Moon could be an alien spaceship was discussed by two academicians of the ex- soviet union, Mikhail Vasin and Alexander Shcherbakov. All these arguments are easily refuted on the ground of our present state of knowledge. And some arguments can be find in this link. But…

Nobel laureate Dr. Harold Urey rejected the idea that the moon result from Earth (see video) and wrote an interesting article about it in 1973, appeared in the Bulletin of the Atomic Scientist.

Recently, Lars Borg, scientist at the Lawrence Livermore National Laboratory gives experimental evidence that Earth and Moon may be younger than previously thought. Indeed, the Moon is unique among all the natural satellites of our Solar System. Its mass ratio when compared to Earth is anomalously high, about 1/81, when compared to Titan/Saturn system, which is 1/4207. Its proximity to planet Earth implies high periodic and secular perturbations of its orbital parameters. In particular, the orbital plane of the Moon is inclined 5 degrees relatively to the ecliptic.

Notwithstanding all reverse arguments that we may raise against this “crazy” idea, it seems to me that convincing arguments coming from the sceptics are not strong enough. This doubtful situation leaves to me with a feeling possibly similar to the one felt by the robots appearing in one of the best scifi movies I ever saw, “Blade Runner”. I give now a moment to remember here a short trailer of the movie and invite you to compare your feelings with robot own “feelings”…imagining for a moment that we are bio-engineering products of an advanced civilisation (from an old colapsed civilisation or alliens). Although weird it may be, we may acquire some “humanity”, and respect toward nature.

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