Angel "Java" Lopez en Blog

Ciencia


Publicado el 21 de Noviembre, 2020, 8:17

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A primate's response to death
https://www.sciencedaily.com/releases/2019/06/190628120437.htm

Coronavirus: un pequeño trozo de proteína podría ser el “arma secreta” que lo hace tan infeccioso y virulento
https://www.clarin.com/sociedad/coronavirus-pequeno-trozo-proteina-podria-arma-secreta-hace-infeccioso-virulento_0_81zK2UGvh.html

Linking the connectome to action: Emergent dynamics in a robotic model of C. elegans
https://arxiv.org/abs/2011.09057

Mysterious interstellar object Oumuamua is not an alien spaceship but scientists are still baffled
https://www.foxnews.com/science/mysterious-interstellar-object-oumuamua-is-not-an-alien-spaceship-but-scientists-are-still-baffled

Scientists Uncover the Universal Geometry of Geology
https://www.quantamagazine.org/geometry-reveals-how-the-world-is-assembled-from-cubes-20201119/

No, Black Holes Will Never Consume The Universe
https://www.forbes.com/sites/startswithabang/2019/07/02/no-black-holes-will-never-consume-the-universe/#5a6f34ac1c5c

Why an Old Theory of Everything Is Gaining New Life
https://www.quantamagazine.org/why-an-old-theory-of-everything-is-gaining-new-life-20180108/

The Quantum Theory That Peels Away the Mystery of Measurement
https://www.quantamagazine.org/how-quantum-trajectory-theory-lets-physicists-understand-whats-going-on-during-wave-function-collapse-20190703

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 15 de Noviembre, 2020, 19:43

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Ligo Sees First Ever Gravitational Waves as Two Black Holes Each Other
https://www.syfy.com/syfywire/ligo-sees-first-ever-gravitational-waves-two-black-holes-eat-each-other

Measurement of Astrophysical Tau Neutrinos in IceCube's High-Energy Starting Events
https://twitter.com/emulenews/status/1326472305036374017
https://arxiv.org/abs/2011.03561

The Children Never Had the Coronavirus. So Why Did They Have Antibodies?
https://www.nytimes.com/2020/11/10/health/coronavirus-children.html?smtyp=cur&smid=tw-nytimesscience

Application of Metabolomics in Alzheimer"s Disease
https://www.frontiersin.org/articles/10.3389/fneur.2017.00719/full

Preexisting and de novo humoral immunity to SARS-CoV-2 in humans
https://science.sciencemag.org/content/early/2020/11/05/science.abe1107

The Pythagoras cup is a fun example of a siphon
https://twitter.com/Rainmaker1973/status/1145217420661002240

In physics, this is why we call the derivative operator the "generator of translations"
https://twitter.com/InertialObservr/status/1145396940122669057

Brain Cell DNA Refolds Itself to Aid Memory Recall
https://www.quantamagazine.org/brain-cell-dna-refolds-itself-to-aid-memory-recall-20201102/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 14 de Noviembre, 2020, 12:19

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The mythical economic data on climate change (1): Nordhaus"s 1994 survey of "experts"
https://www.patreon.com/posts/mythical-data-on-28014748

Physicists Pin Down Nuclear Reaction From Moments After the Big Bang
https://www.quantamagazine.org/physicists-pin-down-nuclear-reaction-from-moments-after-the-big-bang-20201111/

On Unitary Representations of the Inhomogeneous Lorentz Group
https://www.jstor.org/stable/1968551?seq=1

Hugh Everett III
https://twitter.com/mcnees/status/1326542986184847361

Neutrons give an atomic-scale view of SARS-CoV-2 replication mechanism
https://physicsworld.com/a/neutrons-give-an-atomic-scale-view-of-sars-cov-2-replication-mechanism/

Did Astronomers Just Witness the Explosive Birth of a Magnestar?
https://www.syfy.com/syfywire/did-astronomers-just-witness-the-explosive-birth-of-a-magnetar
https://twitter.com/BadAstronomer/status/1326917288944148483

What is a Particle?
https://www.quantamagazine.org/what-is-a-particle-20201112/

NASA"s Hubble Spots "Bizarre Glow" After An "Impossible" Explosion In Space
https://www.forbes.com/sites/jamiecartereurope/2020/11/12/nasas-hubble-spots-bizarre-glow-after-an-impossible-explosion-in-space/?sh=72d06bff2345

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 8 de Noviembre, 2020, 18:26

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El Núcleo Atómico NO es Así
https://www.youtube.com/watch?v=6z5AIQ7AmK8&feature=youtu.be

We finally know what has been making fast radio bursts
https://arstechnica.com/science/2020/11/its-coming-from-inside-the-galaxy-first-fast-radio-burst-source-idd/

This Is How Physicists Trick Particles Into Going Faster Than Light
https://www.forbes.com/sites/startswithabang/2019/06/28/this-is-how-physicists-trick-particles-into-going-faster-than-light/#17c06f52462c

Debate Erupts Over How "Forbidden" Black Holes Grow
https://www.quantamagazine.org/astronomers-debate-how-forbidden-black-holes-grow-20201103/?mc_cid=56d6ace7cb&mc_eid=c608d388a6

Astronomers have decoded a weird signal coming from a strange, 3-body star system
https://www.foxnews.com/science/astronomers-have-decoded-a-weird-signal-coming-from-a-strange-3-body-star-system

The physicist Maria Goeppert Mayer was born #OTD in 1906
https://twitter.com/mcnees/status/1144598916517597184

Lise Meitner y Marie Curie nacieron un 7 de noviembre
https://twitter.com/ValeArvejita/status/1325048600032911361

111 years ago today, an asteroid or comet exploded over a region of Siberia
https://twitter.com/BadAstronomer/status/1145358989783379974

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 7 de Noviembre, 2020, 9:20

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Puedes llamarlo responsabilidad, pero es censura
https://culturacientifica.com/2019/06/27/puedes-llamarlo-responsabilidad-pero-es-censura/

How to Understand the Universe When You"re Stuck Inside of It
https://www.quantamagazine.org/were-stuck-inside-the-universe-lee-smolin-has-an-idea-for-how-to-study-it-anyway-20190627/

NASA headed towards giant golden asteroid that could make everyone on Earth a billionaire
https://www.foxnews.com/science/nasa-headed-towards-giant-golden-asteroid-that-could-make-everyone-on-earth-a-billionaire

Emergence of the Born rule in quantum optics
https://quantum-journal.org/papers/q-2020-10-26-350/

El espacio-tiempo podría ser un fenómeno cuántico
https://www.larazon.es/ciencia/20201106/5m5be4rtmjcwtgrzm55v45ayrq.html

Físicos españoles descubren una nueva propiedad de la luz
https://www.elmundo.es/ciencia-y-salud/ciencia/2019/06/27/5d14e1ee21efa0b0578b45d5.html

Weird space radio signal tracked to its source for the first time
https://twitter.com/newscientist/status/1324022628743553024
https://www.newscientist.com/article/2258758-weird-space-radio-signal-tracked-to-its-source-for-the-first-time/

The Cosmologist Who Dreams in the Universe"s Dark Threads
https://www.quantamagazine.org/harvard-cosmologist-cora-dvorkin-dreams-in-dark-matter-20201105/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 1 de Noviembre, 2020, 17:46

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Lie groups and their Lie algebras - Lec 13 - Frederic Schuller
https://www.youtube.com/watch?v=mJ8ZDdA10GY

Donna Strickland: Nobel Prize in Physics 2018
https://www.nobelprize.org/womenwhochangedscience/stories/donna-strickland

The Neuro-Scientific Basis of Morality
https://www.psychologytoday.com/intl/blog/is-america/201906/the-neuro-scientific-basis-morality

What Is The Smallest Possible Distance In The Universe?
https://www.forbes.com/sites/startswithabang/2019/06/26/what-is-the-smallest-possible-distance-in-the-universe/#51fb405248a1

El Prado pide ayuda a los geólogos para identificar este paisaje
https://www.vozpopuli.com/altavoz/next/Prado-ayuda-geologos-identificar-paisaje_0_1258075755.html

The Simple Idea Behind Einstein"s Greatest Discoveries
https://www.quantamagazine.org/einstein-symmetry-and-the-future-of-physics-20190626

¿Qué Hay Dentro De La Nada?
https://www.youtube.com/watch?v=n3N7Yx8Ht-Y

NASA Astronauts And Satellites Capture Breathtaking Images Of An Awakening Volcano From Space
https://www.forbes.com/sites/startswithabang/2019/06/27/nasa-astronauts-and-satellites-capture-breathtaking-images-of-an-awakening-volcano-from-space/#3b40a5e25f26

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 31 de Octubre, 2020, 10:55

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Philosophers Debate New "Sonic Black Hole" Discovery-
https://www.quantamagazine.org/philosophers-debate-new-sonic-black-hole-discovery-20190625

The Epigenetic Secrets Behind Dopamine, Drug Addiction and Depression
https://www.quantamagazine.org/the-epigenetic-secrets-behind-dopamine-drug-addiction-and-depression-20201027

Elementary Particles
https://math.ucr.edu/home/baez/qg-spring2003/elementary/
https://math.ucr.edu/home/baez/qg-spring2003/elementary/elementary.pdf

Group Theory and Symmetries in Particle Physics
http://publications.lib.chalmers.se/records/fulltext/158707.pdf

A Scientist Who Delights in the Mundane
https://www.quantamagazine.org/l-mahadevan-finds-math-inspiration-in-the-mundane-20201026/

Deep Neural Networks Help to Explain Living Brains
https://www.quantamagazine.org/deep-neural-networks-help-to-explain-living-brains-20201028/

The Most Famous Paradox in Physics Nears Its End
https://www.quantamagazine.org/the-black-hole-information-paradox-comes-to-an-end-20201029/

Hace 178 años un matemático inglés dijo que no podíamos cancelar campos magnéticos a distancia, acabamos de descubrir cómo hacerlo
https://www.xataka.com/investigacion/hace-178-anos-matematico-ingles-dijo-que-no-podiamos-cancelar-campos-magneticos-a-distancia-acabamos-descubrir-como-hacerlo

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 25 de Octubre, 2020, 19:31

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Is Your Brain Really Necessary?
https://rifters.com/real/articles/Science_No-Brain.pdf
https://twitter.com/Dani_Pellicer/status/1318142177634025472

Quantum Tunnels Show How Particles Can Break the Speed of Light
https://www.quantamagazine.org/quantum-tunnel-shows-particles-can-break-the-speed-of-light-20201020/

Last Chance for WIMPs: Physicists Launch All-Out Hunt for Dark Matter Candidate
https://www.scientificamerican.com/article/last-chance-for-wimps-physicists-launch-all-out-hunt-for-dark-matter-candidate/

Roger Penrose interview. Nobel prize in Physics 2020
https://www.youtube.com/watch?v=zMsuxoe9sDk

Hubble's Famous Plate of 1923: a Story of Pink Polyethylene
https://www.aavso.org/media/jaavso/2787.pdf

La Brújula de la Ciencia: La expansión del universo
https://www.ondacero.es/programas/la-brujula/audios-podcast/la-brujula-de-la-ciencia/la-brujula-de-la-ciencia-la-expansion-del-universo_201906245d112ed10cf2e14153fc4cf8.html

Yes, The Apollo Moon Landings Really Did Happen
https://www.forbes.com/sites/startswithabang/2019/06/25/yes-the-apollo-moon-landings-really-did-happen/#4741779f6a8f

Complexity Explorables
http://www.complexity-explorables.org/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 24 de Octubre, 2020, 12:25

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A New Map of All the Particles and Forces
https://www.quantamagazine.org/a-new-map-of-the-standard-model-of-particle-physics-20201022/

How the Neutrino"s Tiny Mass Could Help Solve Big Mysteries
https://www.quantamagazine.org/how-the-neutrinos-tiny-mass-could-help-solve-big-mysteries-20191015/

Theory of Neutrinos
https://arxiv.org/abs/hep-ph?0412099

Physics Nobel Awarded for Black Hole Breakthroughs
https://www.quantamagazine.org/physics-nobel-awarded-for-black-hole-breakthroughs-20201006/

Nobel Chemistry Prize Awarded for CRISPR "Genetic Scissors"
https://www.quantamagazine.org/2020-nobel-prize-in-chemistry-awarded-for-crispr-to-charpentier-and-doudna-20201007/

Roger Penrose discusses his career in mathematical physics
https://physicsworld.com/a/roger-penrose-discusses-his-career-in-mathematical-physics/

El científico español que puso los cimientos para la técnica ganadora del Nobel de Química
https://hipertextual.com/2020/10/espanol-detras-premio-nobel-quimica

Quantum Time Twist Offers a Way to Create Schrödinger"s Clock
https://www.scientificamerican.com/article/quantum-time-twist-offers-a-way-to-create-schroedingers-clock/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 18 de Octubre, 2020, 10:22

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New Clues to Chemical Origins of Metabolism at Dawn of Life
https://www.quantamagazine.org/new-clues-to-chemical-origins-of-metabolism-at-dawn-of-life-20201012/

El teorema de singularidad de Penrose de 1965
https://francis.naukas.com/2020/10/12/el-teorema-de-singularidad-de-penrose-de-1965/

Premio Nobel de Economía 2020 | La Maldición del Ganador y Subastas
https://www.youtube.com/watch?v=MfOGYXH2A5c&feature=youtu.be

El Nobel que pasó de largo
https://metode.es/noticias/el-nobel-que-paso-de-largo.html

The Sveriges Riksbank Prize in Economic Sciences in Memory of Alfred Nobel 2020
https://www.nobelprize.org/prizes/economic-sciences/2020/summary/

A Physicist"s Approach to Biology Brings Ecological Insights
https://www.quantamagazine.org/a-physicists-approach-to-biology-brings-ecological-insights-20201013/

Science Fiction Stories with Good Astronomy & Physics: A Topical Index
https://astrosociety.org/file_download/inline/621a63fc-04d5-4794-8d2b-38e7195056e9

Roger Penrose and the vision thing
https://www.prospectmagazine.co.uk/magazine/roger-penrose-vision-thing-interview-maths-physics

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 17 de Octubre, 2020, 11:53

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Descubrir un agujero negro tiene premio
https://www.larazon.es/ciencia/20201008/rkp4wq5asjg4fgxqge2xahcdbe.html

ATLAS observa a 8.4 sigmas la producción de pares de bosones W inducida por pares de fotones (���� → ����)
https://francis.naukas.com/2020/10/09/atlas-observa-a-8-4-sigmas-la-produccion-de-pares-de-bosones-w-inducida-por-pares-de-fotones-%f0%9d%9b%be%f0%9d%9b%be-%e2%86%92-%f0%9d%91%8a%f0%9d%91%8a/

Roger Penrose"s Nobel Prize
https://johncarlosbaez.wordpress.com/2020/10/08/roger-penroses-nobel-prize/

La verdadera composición última del universo (I): Más allá del modelo estándar
https://culturacientifica.com/2015/08/04/la-verdadera-composicion-ultima-del-universo-i-mas-alla-del-modelo-estandar/

Room-Temperature Superconductivity Achieved for the First Time
https://www.quantamagazine.org/physicists-discover-first-room-temperature-superconductor-20201014/

The shape of chemical functions
https://towardsdatascience.com/the-shape-of-chemical-functions-d1e1568d020

Fossil footprints: the fascinating story behind the longest known prehistoric journey
https://theconversation.com/fossil-footprints-the-fascinating-story-behind-the-longest-known-prehistoric-journey-147520

The mole genome reveals regulatory rearrangements associated with adaptive intersexuality
https://science.sciencemag.org/content/370/6513/208

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 10 de Octubre, 2020, 11:47

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Quantum Computing for English Majors
https://blogs.scientificamerican.com/cross-check/quantum-computing-for-english-majors/

Einstein refrigerator
https://en.wikipedia.org/wiki/Einstein_refrigerator

What"s in a Name? Taxonomy Problems Vex Biologists
https://www.quantamagazine.org/phyla-and-other-flawed-taxonomic-categories-vex-biologists-20190624

Mileva Marić y Albert Einstein
https://elpais.com/elpais/2019/06/21/eps/1561117075_895780.html

How to read and understand a scientific paper: a guide for non-scientists
https://blogs.lse.ac.uk/impactofsocialsciences/2016/05/09/how-to-read-and-understand-a-scientific-paper-a-guide-for-non-scientists/

A second planet orbiting the young nearby star Beta Pictoris!
https://www.syfy.com/syfywire/a-second-planet-for-beta-pic-confirmed
https://twitter.com/BadAstronomer/status/1313135162809634817

Scientists Win Nobel Prize for Discovering the Hepatitis C Virus
https://www.quantamagazine.org/discovery-of-hepatitis-c-virus-wins-nobel-prize-20201005/

Ask Ethan: When Did The Universe Get Its First Quantum Fields?
https://www.forbes.com/sites/startswithabang/2020/10/09/ask-ethan-when-did-the-universe-get-its-first-quantum-fields/#71f6e1e29c96

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 4 de Octubre, 2020, 10:06

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Maria Mitchell snuck out of a party late at night on October 1 1847, so she could do some observing from the roof of her family's home. She spotted a comet with their 2-inch reflector
https://twitter.com/mcnees/status/1312033668890730496

Artificial Intelligence Takes On Earthquake Prediction
https://www.quantamagazine.org/artificial-intelligence-takes-on-earthquake-prediction-20190919/

More Liquid Water Found On - Unver - Mars
https://www.syfy.com/syfywire/more-liquid-water-found-on-under-mars

The Remarkable Self-Organization of Ants
https://www.quantamagazine.org/ants-build-complex-structures-with-a-few-simple-rules-20140409/

When Magic Is Seen in Twisted Graphene, That"s a Moiré
https://www.quantamagazine.org/when-magic-is-seen-in-twisted-graphene-thats-a-moire-20190620

Physicists Hack the Uncertainty Principle to See an Ion Wiggle
https://www.wired.com/story/physicists-hack-the-uncertainty-principle-to-see-an-ion-wiggle

Ten Solstice Facts That Everyone Should Know
https://www.forbes.com/sites/startswithabang/2019/06/21/ten-solstice-facts-that-everyone-should-know/#59d67a8b799e

Planck 2018 (VII): Sobre las anomalías en la polarización del fondo cósmico de microondas
https://francis.naukas.com/2019/06/21/planck-2018-vii-sobre-las-anomalias-en-la-polarizacion-del-fondo-cosmico-de-microondas/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 3 de Octubre, 2020, 10:14

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La teoría de la racionalidad limitada de Herbert Simon
https://psicologiaymente.com/inteligencia/teoria-racionalidad-limitada-herbert-simon

Physicists Argue That Black Holes From the Big Bang Could Be the Dark Matter
https://www.quantamagazine.org/black-holes-from-the-big-bang-could-be-the-dark-matter-20200923/

Alchemy Arrives in a Burst of Light
https://www.quantamagazine.org/alchemy-arrives-in-a-burst-of-laser-light-20200930/

Science is Socially Constructed
https://twitter.com/kareem_carr/status/1309132237569482752

The quantum Ising chain for beginners
https://arxiv.org/pdf/2009.09208v1.pdf

Complexity Scientist Beats Traffic Jams Through Adaptation
https://www.quantamagazine.org/complexity-scientist-beats-traffic-jams-through-adaptation-20200928/

Arthur Ashkin, 98, Dies; Nobel Laureate Invented a "Tractor Beam"
https://www.nytimes.com/2020/09/28/science/arthur-ashkin-dead.html

Why Are Scientists So Cruel To New Ideas?
https://www.forbes.com/sites/startswithabang/2020/09/29/why-are-scientists-so-cruel-to-new-ideas/#3edde7f9250e

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 27 de Septiembre, 2020, 10:55

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Leonardo da Vinci"s Huge Notebook Collections, the Codex Forster, Now Digitized in High-Resolution: Explore Them Online
http://www.openculture.com/2019/06/leonardo-da-vincis-huge-notebook-collections-the-codex-forster-now-digitized-in-high-resolution.html

No, Black Holes Don't Suck Everything Into Them
https://www.forbes.com/sites/startswithabang/2019/06/19/no-black-holes-dont-suck-everything-into-them/

No, a next larger particle collider will not tell us anything about the creation of the universe
http://backreaction.blogspot.com/2019/06/no-next-larger-particle-collider-will.html

Two new papers explore the complicated physics behind bubbles and foams
https://arstechnica.com/science/2019/06/two-new-papers-explore-the-complicated-physics-behind-bubbles-and-foams/

How to Turn a Quantum Computer Into the Ultimate Randomness Generator
https://www.quantamagazine.org/how-to-turn-a-quantum-computer-into-the-ultimate-randomness-generator-20190619/

Scientists spot merging galaxies from 13 billion years ago
https://www.foxnews.com/science/scientists-merging-galaxies-13-billion-years

Descubren dos planetas cercanos similares a la Tierra que podrían tener agua líquida
https://www.clarin.com/sociedad/descubren-planetas-cercanos-similares-tierra-podrian-tener-agua-liquida_0_V__EZwy49.html

This Is Why Every Galaxy Doesn't Have The Same Amount Of Dark Matter
https://www.forbes.com/sites/startswithabang/2019/06/20/this-is-why-every-galaxy-doesnt-have-the-same-amount-of-dark-matter/#d4ee57060447

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 26 de Septiembre, 2020, 12:02

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What's the matter with dark matter? Observations show we're missing something
https://twitter.com/BadAstronomer/status/1304441519265533952
https://www.syfy.com/syfywire/whats-the-matter-with-dark-matter-observations-show-were-missing-something

Hallan una especie de «monstruo del lago Ness» de 15 toneladas en la Antártida
https://www.abc.es/ciencia/abci-hallan-especie-monstruo-lago-ness-15-toneladas-antartida-201906141639_noticia.html

La primera detección de fotones con más de 100 TeV de una fuente astrofísica
https://francis.naukas.com/2019/06/14/la-primera-deteccion-de-fotones-con-mas-de-100-tev-de-una-fuente-astrofisica/

Is The Matter In Our Universe Fundamentally Stable Or Unstable?
https://www.forbes.com/sites/startswithabang/2020/09/22/is-the-matter-in-our-universe-fundamentally-stable-or-unstable/

Ask Ethan: Is It Really Impossible For A Jupiter-Like Planet To Orbit A White Dwarf?
https://www.forbes.com/sites/startswithabang/2020/09/25/ask-ethan-is-it-really-impossible-for-a-jupiter-like-planet-to-orbit-a-white-dwarf/

How to Assess Risks During the Coronavirus Pandemic
https://www.quantamagazine.org/how-to-assess-risks-during-the-coronavirus-pandemic-20200925/

Wolfgang Paul Was A Great Physicist, Not A Typo Of 'Wolfgang Pauli'
https://www.forbes.com/sites/startswithabang/2019/06/13/wolfgang-paul-was-a-great-physicist-not-a-typo-of-wolfgang-pauli

Ask Ethan: What Could Solve The Cosmic Controversy Over The Expanding Universe?
https://www.forbes.com/sites/startswithabang/2019/06/15/ask-ethan-what-could-solve-the-cosmic-controversy-over-the-expanding-universe/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 20 de Septiembre, 2020, 18:18

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Meet the Woman Making Ants the Next Big Thing in Biology
https://www.nationalgeographic.com/science/2018/07/ants-evolution-corrie-moreau-women-in-biology/

Eric Adelberger, Jens Gundlach and Blayne Heckel just won the $3 million Breakthrough Prize in Fundamental Physics - for checking that Newton's law of gravity still holds at a distance of 52 micrometers!
https://twitter.com/johncarlosbaez/status/1304080464332820481

Positivo no es infectivo: por qué conviene repensar nuestra forma de medir la covid
https://www.vozpopuli.com/altavoz/next/PCRs-diagnostico-covid-infectivo-positivo_0_1390662375.html

Physics is stuck — and needs another Einstein to revolutionize it, physicist Avi Loeb says
https://www.salon.com/2020/09/06/physics-is-stuck--and-needs-another-einstein-to-revolutionize-it-physicist-avi-loeb-says/

A Subway Map of Human Anatomy
http://www.openculture.com/2019/06/a-subway-map-of-human-anatomy.html
All the Systems of Our Body Visualized in the Style of the London Underground

Is Alien Life Hiding Beyond Earth 2.0?
https://www.forbes.com/sites/startswithabang/2019/06/14/is-alien-life-hiding-beyond-earth-2-0/#70376c129665

What"s inside a black hole? We"re looking into it
https://www.irishtimes.com/news/science/what-s-inside-a-black-hole-we-re-looking-into-it-1.3915715

How was the Higgs Boson discovered?
https://twitter.com/InertialObservr/status/1139242278755553280

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 19 de Septiembre, 2020, 12:24

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La supuesta galaxia sin materia oscura tiene más de un 75% de materia oscura
https://francis.naukas.com/2018/07/01/la-supuesta-galaxia-sin-materia-oscura-tiene-mas-de-un-75-de-materia-oscura/

Immune Cells Measure Time to Identify Foreign Proteins
https://www.quantamagazine.org/immune-cells-measure-time-to-identify-foreign-proteins-20190603

How Two Became One: Origins of a Mysterious Symbiosis Found
https://www.quantamagazine.org/symbiotic-bacteria-tell-ant-embryos-how-to-develop-20200909

No, This Is Not A Hole In The Universe
https://www.forbes.com/sites/startswithabang/2019/06/05/no-this-is-not-a-hole-in-the-universe

El modelo de Ising cumple 100 años
https://guillermoabramson.blogspot.com/2020/09/el-modelo-de-ising-cumple-100-anos.html

How Mathematical "Hocus-Pocus" Saved Particle Physics
https://www.quantamagazine.org/how-renormalization-saved-particle-physics-20200917

Quantum Leaps, Long Assumed to Be Instantaneous, Take Time
https://www.quantamagazine.org/quantum-leaps-long-assumed-to-be-instantaneous-take-time-20190605/

James Clerk Maxwell was born #OTD in 1831.
https://twitter.com/mcnees/status/1006875909935325184
He showed that electric and magnetic fields are aspects of a single phenomenon, determined the equations that govern it, and concluded that light and other forms of radiation are electromagnetic waves

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 13 de Septiembre, 2020, 10:44

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LIGO/Virgo detected the biggest black hole merger ever!
https://twitter.com/BadAstronomer/status/1301174123071242240

Understanding Entanglement With SVD
https://twitter.com/math3ma/status/1303020085876002817
https://www.math3ma.com/blog/understanding-entanglement-with-svd

A New Cosmic Tension: The Universe Might Be Too Thin
https://www.quantamagazine.org/a-new-cosmic-tension-the-universe-might-be-too-thin-20200908/

The coronavirus is mutating — does it matter?
https://www.nature.com/articles/d41586-020-02544-6

GW190521: la fusión de agujeros negros más masiva observada por LIGO/Virgo
https://francis.naukas.com/2020/09/02/gw190521-la-fusion-de-agujeros-negros-mas-masiva-observada-por-ligo-virgo/

"Traveling to the future is compatible with the laws of physics"
https://www.explica.co/traveling-to-the-future-is-compatible-with-the-laws-of-physics/

An Unexpected Twist Lights Up the Secrets of Turbulence
https://www.quantamagazine.org/an-unexpected-twist-lights-up-the-secrets-of-turbulence-20200903/

Mi afición a los meteoritos
https://twitter.com/vmanchado/status/1135628016435023872

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 6 de Septiembre, 2020, 11:20

En estos días de "lockdown" en Buenos Aires, estoy aprovechando para leer bastante de distintos temas, especialmente de matemáticas, pero también de física, historia de la ciencia, e historia en general. Quiero hoy hacer comentarios breves sobre algunos capítulos de libros que leí últimamente.

Primero, descubrí el Quantum Field Theory: From Operators to Path Integrals, Second Edition, de Kerson Huang. Teoría de campos es un tema en el que tengo aprendizaje pendiente (incluso en teoría de campos clásica). En general, los libros de teoría de campos cuántica introducen conceptos clásicos, y este libro no es la excepción. En el primer capítulo describe la cuerda clásica, como límite de una cadena discreta. Para llegar a las ecuaciones de movimiento de las masas (elementos discretos de la cadena) recurre a plantear lagrangiano entre masa qj y masa qj+1. Considera casos donde los extremos están fijos, y caso sin esa restricción. Tengo que entender major la justificación del lagrangiano que usa, y algunas operaciones de paso al límite. UN TEMA INTERESANTE: en el paso al límite, menciona que SE DEBE apelar a una "cutoff frequency": cortar los cálculos en alguna frecuencia. Lo hace, y consigue la descripción de la cuerda continua. Y eso es la renormalización: "the high-frecuency cutoff is a theoretical necessity".

Para cuantizar la cuerda, parte de hamiltonianos, sobre cuerda discreta, y luego pasando al límite continuo. La discusión de características de los campos cuánticos las posterga para el capítulo 2, donde aparecen la ecuación de Klein-Gordon, Dirac, y también el "viejo truco" de pasar de una ecuación clásica a una cuántica, cambiando energía y momento por operadores. Así consigue rápidamente la ecuación Schrödinger.

Volviendo al capítulo 1, Huang expone la segunda cuantización: que no es una operación a HACER sobre la primera, sino una alternativa SEPARADA para obtener un campo cuántico (tengo la impresión que es la más común de encontrar en los libros). Se parte de una colección de partículas idénticas descriptas por la mecánica cuántica. Y se consigue un campo que es una DESCRIPCION EQUIVALENTE de ese sistema. Así, partículas y campo están en igualdad de importancia, lo que va a tener su importancia cuando en el libro se describa la dualidad onda partícula. Aparecen operadores de aniquilación y de creación. También plantea los temas de estadística de Fermi y Bose, según los autovalores de operadores sean simétricos o antisimétricos ante el cambio de coordenadas. Es un tema muy interesante de investigar, y que funda todo el comportamiento de los fermiones y el principio de Pauli, gracias a lo cual temenos materia, y no solamente fotones y luz.

En los próximos posts, espero comentar sobre otras lecturas a la que me llevó la lectura del libro de Huang:

A Story of Light, A Short Introduction to Quantum Field Theory of Quarks and Leptons, de M.Y.Han.
Facts and Misteries in Elementary Particle Physics, de Martinus Veltman
Inward Bound: of Matter and Forces in the Physical World, de Abraham Pais

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

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