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From: BARILOCHENSE6999  (Original message) Sent: 31/01/2019 17:55
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11 DE SEPTIEMBRE O SEPTIEMBRE 11

11/9 O 9/11

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11 Septembre 2001...?

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"¡Oh profundidad de las riquezas de la sabiduría (sophia)
y de la ciencia (gnwsiV, gnosis) de Dios!
¡Cuán incomprensibles son sus juicios, e inescrutables sus caminos!"
(Romanos, 11: 33).

 

 
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Reply  Message 207 of 221 on the subject 
From: BARILOCHENSE6999 Sent: 02/09/2023 12:24


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From: BARILOCHENSE6999 Sent: 26/11/2023 01:22
Pin on Prayer for you
Inquirer on X: "PRAY FOR US ???? Today, Sept. 29, is the feast day of St.  Michael, one of the main angels of God. https://t.co/0JyoH9eGhx" / X
Source: Facts.net

Welcome to our daily historical journey! In this article, we will explore the intriguing events and interesting facts that occurred on September 27th throughout history. It’s fascinating to delve into the past and uncover the significant milestones, memorable moments, and noteworthy achievements that shape our world today. From groundbreaking discoveries and technological advancements to political events and cultural milestones, September 27th has proven to be a day of great importance. This day holds a treasure trove of historical significance, and by exploring the events that unfolded on this date, we gain a deeper understanding of our collective past. So, join us as we embark on a captivating journey through time to discover all the facts and events that have taken place on September 27th in history.

Table of Contents
 

HISTORICAL EVENTS

  • 1954: The U.S. Army opens the first nuclear power station at Shippingport, Pennsylvania.

  • 1964: The Warren Commission releases its report, concluding that Lee Harvey Oswald acted alone in the assassination of President John F. Kennedy.

  • 1996: Taliban forces seize control of Kabul, the capital of Afghanistan.

  • 2008: SpaceX launches the Falcon 1, becoming the first privately-funded liquid-fueled rocket to reach orbit.

  • 2014: Hong Kong pro-democracy protests, also known as the “Umbrella Movement,” begin after China announces plans for strict control over Hong Kong’s elections.

SCIENTIFIC BREAKTHROUGHS

  • 1825: George Stephenson successfully operates the first practical steam locomotive, the “Locomotion No. 1,” on the Stockton and Darlington Railway in England.

  • 1942: The first successful controlled nuclear chain reaction is achieved by a team led by Enrico Fermi at the University of Chicago.

  • 1998: The first robotic mission to Mars, NASA’s Mars Pathfinder, deploys the Sojourner rover and begins transmitting valuable scientific data back to Earth.

  • 2007: NASA’s Dawn spacecraft is launched, embarking on a mission to study the protoplanet Vesta and the dwarf planet Ceres.

  • 2015: Scientists announce the discovery of liquid water on Mars, raising the possibility of potential microbial life on the planet.

 
 
 
Enrico Fermi. was born in Rome on 29th September, 1901, He attended a local  grammar school In 1918, he won a fellowship of the Scuola Normale  Superiore. - ppt download
Enrico Fermi. was born in Rome on 29th September, 1901, He attended a local  grammar school In 1918, he won a fellowship of the Scuola Normale  Superiore. - ppt download
Enrico Fermi, Italian-American physicist, received the 1938 Nobel Prize in physics for identifying new elements and discovering nuclear reactions by his method of nuclear irradiation and bombardment. He was born in Rome, Italy, on September 29, 1901, and died in Chicago, Illinois, on November 28, 1954.
 
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Reply  Message 210 of 221 on the subject 
From: BARILOCHENSE6999 Sent: 07/12/2023 05:09
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Iglesia de Santa María de la Victoria

 
 
 
 
 
 
Fachada de Santa María de la Victoria.

La Iglesia de Santa María de la Victoria (en italianoSanta María della Vittoria) es una pequeña basílica en Roma (Italia), en la Via XX Settembre.

Los Carmelitas descalzos obtuvieron un Breve apostólico de Paulo V para edificar conventos de su Orden en cualquier parte de la Cristiandad; fue este el primero que fundaron en la última parte del Monte Quirinal el año de 1606.

Historia[editar]

La iglesia se fundó en 1605 como una capilla dedicada a san Pablo para los carmelitas descalzos. La propia orden dotó de fondos a la obra del edificio hasta el descubrimiento en las excavaciones de la escultura conocida como el Hermafrodita BorgheseScipione Borghese se apropió de ella, pero a cambio, y quizá para compensar su pérdida de influencia debido a la muerte de su tío y patrón, financió el resto de la obra de la fachada y prestó a la orden a su arquitecto, Giovanni Battista Soria. Estas concesiones, sin embargo, sólo se llevaron a efecto en 1624, aunque la obra se acabó dos años más tarde.

Después de la victoria católica en la batalla de la Montaña Blanca en 1620, que hizo retroceder la Reforma en Bohemia, la iglesia fue consagrada de nuevo a la Virgen María. Una imagen maltrecha había sido recuperada del ámbito de aquella batalla por Fray Domingo de Jesús María, de dicha Orden, de las ruinas de la casa de campo de un noble cristiano bohemio, a la cual se le atribuyó la victoria, llamándola Santa María de la Victoria. La imagen fue llevada a Roma por Fray Domingo, depositándose en Santa María la Mayor en presencia de Gregorio XV.

El nombre de Santa María de la Victoria, se dio ulteriormente, en conmemoración por haber reconquistado el emperador Fernando I la ciudad de Praga en 1671. Estandartes turcos capturados en el Sitio de Viena de 1683 cuelgan en la iglesia, como parte de este tema victorioso.

Vista general[editar]

Arquitectura[editar]

La capilla Cornaro, con el Éxtasis de santa Teresa de Bernini presidiendo el altar, representada en una pintura de Guido Ubaldo Abbatini, 1652 (Staatliche Museum, Schwerin).

La iglesia es la única estructura diseñada y completada por el arquitecto del Barroco temprano, Carlo Maderno, aunque el interior padeció un fuego en 1833 y requirió una restauración. Su fachada, sin embargo, fue erigida por Soria en vida de Maderno (1624-1626), mostrando la inconfundible influencia de la cercana Santa Susanna de Maderno.

Su interior tiene una sola nave, amplia, bajo una bóveda segmentada baja, con tres capillas laterales interconectadas detrás de arcos separados por colosales pilastras corintias con capiteles dorados que apoyan un rico entablamento. Revestimientos de mármol que contrastan entre sí están enriquecidos con ángeles y putti de estuco blanco y dorado en bulto redondo. El interior fue enriquecido progresivamente después de la muerte de Maderno; su bóveda fue pintada al fresco en 1663 con temas triunfales dentro de compartimentos con marcos ficticios: La Virgen María triunfa sobre la Herejía y Caída de los ángeles rebeldes ejecutados por Giovanni Domenico Cerrini.

Obras[editar]

Sin duda, parte de la fama de este templo se debe a albergar una de las obras maestras del Barroco, la capilla Cornaro, espectacular y teatral espacio presidido por el grupo escultórico que representa el Éxtasis de Santa Teresa, de Gian Lorenzo Bernini, quizá la obra más conocida de este autor en el campo de la escultura. En la capilla situada frente a esta, dedicada a San José, se encuentra un grupo escultórico que representa el tema del Sueño de San José, obra del escultor Domenico Guidi, que se inspira en la obra de Bernini delante de la cual se halla.1

Tituli[editar]

Santa María de la Victoria es una iglesia titular. El cardenal presbítero del Titulus S. Mariae de Victoria era el cardenal Giuseppe Caprio hasta su muerte en octubre de 2005. El 24 de marzo de 2006, el papa Benedicto XVI elevó a Seán Patrick O'Malley al titulus.


Reply  Message 211 of 221 on the subject 
From: BARILOCHENSE6999 Sent: 27/12/2023 01:31
Class 6] What is the Indus Valley Civilization also known as? Why?
 
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Menchem Begin a Wanted terrorist for bombing David hotel murdering 90  British. He was honored to be PM, and Nobel prize for peace. Sunak visted David  hotel to support the same Zionism :
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Reply  Message 218 of 221 on the subject 
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Science in the Bible: The Water Cycle
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From: BARILOCHENSE6999 Sent: 02/12/2024 13:53
 

The realm of relativistic hydrodynamics

Modeling relativistic fluids and the phenomena associated with them – from supernovae and jets to merging neutron stars

AN ARTICLE BY JOSÉ ANTONIO FONT RODA

Hydrodynamics or fluid dynamics is the study of the behaviour of fluids such as water and air – water flowing down a canal, but also, for instance, air flowing around an airplane fuselage. The term relativistic hydrodynamics (or relativistic fluid dynamics) refers to the study of flows in the arena of special or of general relativity. Special relativity will come into play when the velocities attained by certain portions of the fluid or by the fluid as a whole approach the speed of light. General relativity comes into play when there are sufficiently strong gravitational fields – either because the fluid’s environment features such fields, or because the mass and energy of the fluid are sufficient to generate their own strong gravity.

The flows we are accustomed to in daily life are a far cry from meeting either of the two conditions – even the flows encountered by a supersonic aircraft amount to no more than a fraction of a percent of the speed of light, and within the whole solar system, there are no really strong sources of gravity altogether. However, such extreme conditions, where hydrodynamics becomes relativistic, are routinely encountered by astronomers observing some of the most violent events in the cosmos.

In fact, almost any phenomenon astronomers observe in the context of what is suitably called high-energy astrophysics requires a relativistic description. In order to understand the dynamics and evolution of such phenomena (we’ll get around to some impressive examples, below), astrophysicists usually resort to mathematical models which incorporate relativistic hydrodynamics as a key building block.

The challenge of relativistic hydrodynamics

The equations describing relativistic hydrodynamics are remarkably complex. In addition to Einstein’s description of gravity, space and time – which entails equations that are already quite complex all by themselves – they must also incorporate proper models for the properties and behaviour of matter, for instance how it flows or reacts to external pressure. For very idealised situations it might be possible to do the calculations by hand, writing down explicit formulae describing the dynamics. An example would be the collapse of a shell that is perfectly spherical (and thus perfectly symmetrical) and made of matter which has very simple properties, dust, for instance, which has no internal pressure to resist gravity, and which thus collapses readily to form a black hole. But for more realistic matter models, which are necessarily more complicated and without any assumption of symmetry, the only option left is to perform computer simulations, in other words: to use the techniques of numerical relativity.

Such simulations have become a powerful way to improve our understanding of the dynamics and evolution of the different kinds of relativistic flows encountered in physics. In particular, this is true for astrophysical systems which, given their size and mass, do not lend themselves to laboratory experimentation. Even so, in order to produce realistic simulations, it is necessary to push current computer technology and programming to their very limits. Indeed, progress in the field is closely tied to advances in the capabilites (such as speed and memory) of (super-)computers on the one hand, and to improvements in the design of ever more efficient and accurate simulation algorithms on the other.

Let us now take a quick tour of the astrophysical realm of relativistic hydrodynamics.

Collapse

We start with a paradigmatic example for the necessity of relativistic hydrodynamics: the collapse of the core of a massive star in the course of a supernova explosion, leading to the formation of extremely compact objects – neutron stars or possibly even black holes.

As the core of the star collapses, it reaches enormous densities – at peak values, matter is so compressed that a tablespoon full would have a mass of more than a hundred million tons – and the dynamic evolution is highly interesting, from the core literally bouncing back as the properties of matter change to the formation of travelling disturbances (shocks). During its fall, the matter can reach velocities up to 40 percent of the speed of light. For the collapse itself, Newtonian gravity and Einstein’s general relativity give markedly different predictions – in Einstein’s theory, gravity in the central regions is up to 30 percent stronger. This makes a relativistic description of hydrodynamics and gravity absolutely essential, especially in the case of a rotating inner core, where there is a delicate balance between the centrifugal forces associated with rotation and gravity’s inward pull. The following animation is based on a relativistic simulation of a collapsing stellar core:

star_collapse

[Image: AEI/ZIB/LSU. Animation size 942kB; please allow time for loading.]

Download movie version (mpeg, 19MB) here

The colors encode the different densities; during the animation, you can see the formation of a red-orange region that is the neutron star. The red and green patterns projected onto an imaginary plane beneath the newly formed star towards the end of the animation represent the gravitational waves produced during the collapse.

As a result of the core bouncing back, the outer layers of the star are ejected. This starts off the supernova explosion with its massive increase in brightness that allows astronomers here on earth to observe these phenomena even when they happen in other galaxies! The debris of the explosion makes for beautiful astronomical objects such as the supernova remnant N63a in one of our neighbouring galaxies, the Large Magellanic Cloud:

 

Supernova remnant N63a

[Image: NASA/ESA/HEIC/Hubble Heritage Team (STScI/AURA)]

Core collapse is not the only way to make a supernova. Alternatively, we might be dealing with a White dwarf star – the remnant of a low-mass star like our Sun – capturing matter from an orbiting companion. Once a critical mass is reached, the White Dwarf will disintegrate in a thermonuclear explosion, leading to what astronomers call a supernova of type Ia.

 

Relativistic jets

Another very common phenomenon where relativistic hydrodynamics comes into play is the formation of so-called jets – situations in which matter flows onto a compact body, and some of the matter being flung away in a pair of tightly focussed beams! If this happens around a compact object of a few or a few dozen solar masses, we have what is called a microquasar; if the central object is much more massive, with a couple of millions or even billions of solar masses, we are dealing with an active galactic nucleus. The following image shows an example, the radio galaxy 3C272.1. In the close-up, one can clearly see the two tight beams emitted in opposite directions from the central core:

 

nrao_ngc4374

[Image: NRAO/AUI/NSF]

In fact, in the jets of many extra-galactic radio sources associated with active galactic nuclei, it seems as if matter were propagating faster than the speed of light! While this is just an optical illusion caused by matter moving near the speed of light, and almost directly towards or directly away from the observer, for this optical effect to occur, the jets’ flow velocities must be at least as large as 99% of the speed of light . One example, a blob of plasma (left) moving away from the core of an object called a blazar (an active galactic nucleus whose approaching jet is seen almost exactly head-on), is shown in the sequence below:

 

 

nrao_0827_243

[Image: Piner et al., NRAO/AUI/NSF]

The object is the blazar 0826+243, and the plasma blob appears to move at 25 times the speed of light – while, in reality, it “only” moves at more than 99.9% of lightspeed.

 

Astronomers have made many high-resolution radio observations of jets, revealing a wealth of form and structure. Using the equations of relativistic hydrodynamics, together with the equations governing the dynamics of magnetic fields and the interactions of such fields with matter (“relativistic magneto-hydrodynamics”), it is possible to explain how these structures come about. In recent years, researchers have managed to perform quite detailed simulations of relativistic jets. An example can be seen in the animation below, which shows the evolution of a powerful jet as it propagates through the intergalactic medium:

 

jetsim

[Image: Max Planck Institute for Astrophysics/L. Scheck et al. in Mon. Not. R. Astron. Soc., 331, 615-634, (2002).]

For the main structures observed in the simulations – for instance propagating discontinuities in the beam, and a hot spot at the head of the jet – astronomers can find counterparts as they observe extragalactic radio sources.

 

Gamma ray bursts

A relativistic description of gravity and of the dynamics of matter is also necessary in scenarios involving the gravitational collapse of massive stars (with masses of about 30 solar masses and higher) to form black holes, or during the last phases of the coalescence of two neutron stars which orbit each other. These two explosive events are believed to be the mechanisms responsible for the so-called gamma-ray bursts, the most luminous events in the universe short of the big bang itself. In particular, stellar collapse is considered the mechanism behind what are called “long” gamma-ray bursts, the bursts lasting for about 20 seconds, while neutron star mergers are regarded as responsible for “short” gamma-ray bursts, with a duration of only about 0.2 seconds. The following animation shows on the left a false colour image of the gamma rays received from the different regions of the whole sky, using data collected with NASA’s Compton Gamma Ray Observatory. As you can see, there is a bright flash in the top half which, at one time, is so bright that it dominates the whole of the image. This is one particular gamma ray burst; the curve on the right traces how the burst’s brightness changes over time:

 

grb_animation

[Image: NASA’s “Imagine the Universe!” website]

Since the gamma-ray bursts take place at a distance of billions of light years from Earth, the fact that, even at that distance, they are visible as extremely bright phenomena implies that huge amounts of energy must be released – comparable to converting the mass of our sun completely into gamma-rays over the course of a few seconds within a region of space no more than a couple of thousand kilometres across. There is general agreement, supported by observational evidence, that the gamma rays are not emitted in all directions (such as the emissions of a light bulb), but that they are focussed (such as the light from the beam of a lighthouse, which you only see if it is pointed directly at you). The focussing accounts for some part of their perceived brightness, and it would mean we observe only those gamma ray bursts whose light happens to be emitted exactly in the direction of the Earth. The mechanism for this focussing would be, once more, matter moving at relativistic speeds to form some kind of jet. Theoretical models estimate that the matter responsible for the gamma-ray burst emission must be travelling at more than 99.99% of the speed of light.

 

Simulations of how this movement comes about and causes an event as spectacular as a gamma ray burst are, once more, the province of relativistic hydrodynamics. For short gamma ray bursts, these simulations need to track the merger of two orbiting neutron stars. The following animation illustrates one such simulation, where each of the two neutron stars has 1.4 times as much mass as our sun:

 

ns_merger

[Image: M. Shibata, Tokyo University. Animation size 651kB; please allow time for loading.]

Download movie version (mpeg, 6.6MB) here.

 

The final stage of the merger which is shown here would take about 3 thousandth of a second from start to finish. In the animation, the colors encode different densities, while the velocity of matter in different regions is represented by little arrows.

There is an additional aspect to all these astrophysical scenarios: The presence of both relativistic flows and massive yet compact objects turns them into prime candidates for the production of gravitational waves! The possibility of directly detecting these elusive ripples in the curvature of spacetime, and of extracting a wealth of new information from the data, is one of the driving motivations of present-day research in relativistic astrophysics – and faithful modelling of these situations using relativistic hydrodynamics is a key ingredient of successful gravitational wave astronomy!

Man-made relativistic flows

While natural flow processes here on Earth are a far cry from reaching relativistic speeds, there are indeed artificial – man-made – relativistic flows, namely in particle accelerators. One example is the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory in New York, which began operation in 2000, another the Large Hadron Collider (LHC) at CERN near Geneva, which is currently under construction.

In these facilities heavy ions – heavy atomic nuclei, for instance those of gold or lead, stripped of their electrons – are accelerated to ultra-relativistic velocities and made to collide with one another. At RHIC, the projectiles travel at typical speeds of 99.995% the speed of light – at such speed, the relativistic mass of a moving object is more than a hundred times larger than its mass at rest! After the LHC has started its operations in late 2007, there will be the possibility for experiments in which the mass – and energy – will be increased by almost a factor of one hundred.

Heavy-ion collision experiments provide a unique way to compress and heat up nuclear matter, and to prove the existence of an exotic state of ultra-compressed nuclear matter, called a quark-gluon-plasma, which is predicted by the theory of strong nuclear interactions (quantum chromodynamics). They recreate, within a tiny region of space, conditions similar to those under which matter existed in the early universe, fractions of a second after the big bang.

Physicists use several techniques do describe what happens in these collisions. A number of results can be obtained by treating all the particles involved as separate objects. But for other calculations, it is much more useful to treat the dense, strongly interacting matter formed in the collision as a continuous fluid. Of course, given the energies involved, we need to take into account the effects of special relativity. As an example, the following animation shows results of a simulation of a jet – a particle stream produced in such collisions – propagating through a simplified version of such a fluid, producing a Mach cone similar to the sonic boom of a supersonic aircraft:

 

mach_cone

[Animation B. Betz, Goethe-Universität Frankfurt.]

Numerical simulations with relativistic fluid models have proved to be of great help in understanding certain aspects of these highly energetic heavy-ion collisions.

 

Further Information

Relativistic background information for this Spotlight topic can be found in Elementary Einstein, in particular in the chapter Black Holes & Co..

Further related Spotlights on relativity can be found in the category Black Holes & Co..

Further information about some of the animations displayed in this text:

Further simulations from Albert Einstein Institute’s numerical relativity group can be found on the numrel@aei homepage.

A variety of other simulations of merging neutron stars are accessible on Masaru Shibata’s Homepage.

NASA’s Imagine the universe! website has a wealth of accessible material about all areas of astrophysics.

Presentations by Barbara Betz containing further simulations can be downloaded from the Helmholtz Research School Presentation page.

https://www.einstein-online.info/en/spotlight/hydrodynamics_realm/

Reply  Message 221 of 221 on the subject 
From: BARILOCHENSE6999 Sent: 06/12/2024 14:09
The string theory time travel paradox^2

The string theory time travel paradox^2

Time is like a river, it swifts and shores in one direction

 

This is a notion with which everyone must be familiar with, the obsession to know more about the universe and how things are happening the way they happen goes way back in 20,000 BC when cosmologist made attempts to describe the force which makes it all stable. Time is one leg of the chair of the universe in which we all stand, thus it is quite dangerous to tamper the force and experiment with it.

 

Consider this analogy of time and river, both have a unidirectional flow and we are just the boat sailing along whether be time or the river. Travelling backwards against the flow requires a lot of energy like what quoted by the theory of relativity E=mc^2 is the amount of energy we have to achieve, to begin with, time travel.

 

Now, as you might have a little idea about string theory, which discusses the how the river of time is divided into different streams and the stream which we get depends upon the actions we take in present. 

 

From the concept of time travel, we can conclude that if we get enough energy we can flow back in time, but if we don't give it in the right direction, we might face consequences. Some of the hypothesis of the event that may follow are :

 

1. We can end up being an alternate form of reality ( the one we can't relate to from our past)

2. We might alter the space-time and end up having both the different reality come together

3. The concept to enter in an alternate reality may require more energy than to go in our reality of past, hence it might not be achieved

 

Following it all, it might be difficult to relate but consider like this, you have just started to move the boat against the stream but instead of going to the diversion from where you came in, you chose the alternate stream and thus you are in an alternate past. OR you try to go back to your path from where you came and suddenly the stream takes you to different diversion and you end up in an alternate reality of your time, both of which are equally exciting and terrifying.

 

My notion to say it as paradox square is because as both time travel and string theory are a big paradox in itself, it's quite difficult to imagine such an event to happen. The only way we can know it all when we get to know how to flow against the flow of time and look it all by ourselves.

https://www.linkedin.com/pulse/string-theory-time-travel-paradox2-tanuj-handa


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