#amplitudes

[lgbtqreads]

Most Anticipated LGBTQ+ Adult Fiction: January-June 2025

Due to the delightfully large volume of titles, Romances will be getting their own post later this week! Mothers and Sons by Adam Haslett (January 7th) At forty, Peter, an asylum lawyer in New York City, is overworked and isolated. He spends his days immersed in the struggles of immigrants only to return to an empty apartment and occasional hook-ups with a man who wants more than Peter can give.…

[4gravitons]

Amplitudes 2024, Continued

Completing this year's Amplitudes conference coverage

I’ve now had time to look over the rest of the slides from the Amplitudes 2024 conference, so I can say something about Thursday and Friday’s talks. Thursday was gravity-focused. Zvi Bern’s review talk was actually a review, a tour of the state of the art in using amplitudes techniques to make predictions for gravitational wave physics. Bern emphasized that future experiments will require much…

[mindblowingscience]

Cyanobacteria, an ancient lineage of bacteria that perform photosynthesis, have been found to regulate their genes using the same physics principle used in AM radio transmission. New research published in Current Biology has found that cyanobacteria use variations in the amplitude (strength) of a pulse to convey information in single cells. The finding sheds light on how biological rhythms work together to regulate cellular processes.

Continue Reading.

[west-brooke]

“Even teenage vigilantes need a nap”

Through gritted teeth. It’s okay to post my oc content on here it’s my blog it’s my house. Anyway really proud of the lighting on this one and figured I’d share. This is the first time posting my own stuff on here but I’m trying to branch out. This is Amp she lives rent free in my brain.

[jcmarchi]

Study: Early dark energy could resolve cosmology’s two biggest puzzles

New Post has been published on https://thedigitalinsider.com/study-early-dark-energy-could-resolve-cosmologys-two-biggest-puzzles/

Study: Early dark energy could resolve cosmology’s two biggest puzzles

A new study by MIT physicists proposes that a mysterious force known as early dark energy could solve two of the biggest puzzles in cosmology and fill in some major gaps in our understanding of how the early universe evolved.

One puzzle in question is the “Hubble tension,” which refers to a mismatch in measurements of how fast the universe is expanding. The other involves observations of numerous early, bright galaxies that existed at a time when the early universe should have been much less populated.

Now, the MIT team has found that both puzzles could be resolved if the early universe had one extra, fleeting ingredient: early dark energy. Dark energy is an unknown form of energy that physicists suspect is driving the expansion of the universe today. Early dark energy is a similar, hypothetical phenomenon that may have made only a brief appearance, influencing the expansion of the universe in its first moments before disappearing entirely.

Some physicists have suspected that early dark energy could be the key to solving the Hubble tension, as the mysterious force could accelerate the early expansion of the universe by an amount that would resolve the measurement mismatch.

The MIT researchers have now found that early dark energy could also explain the baffling number of bright galaxies that astronomers have observed in the early universe. In their new study, reported today in the Monthly Notices of the Royal Astronomical Society, the team modeled the formation of galaxies in the universe’s first few hundred million years. When they incorporated a dark energy component only in that earliest sliver of time, they found the number of galaxies that arose from the primordial environment bloomed to fit astronomers’ observations.

“You have these two looming open-ended puzzles,” says study co-author Rohan Naidu, a postdoc in MIT’s Kavli Institute for Astrophysics and Space Research. “We find that in fact, early dark energy is a very elegant and sparse solution to two of the most pressing problems in cosmology.”

The study’s co-authors include lead author and Kavli postdoc Xuejian (Jacob) Shen, and MIT professor of physics Mark Vogelsberger, along with Michael Boylan-Kolchin at the University of Texas at Austin, and Sandro Tacchella at the University of Cambridge.

Big city lights

Based on standard cosmological and galaxy formation models, the universe should have taken its time spinning up the first galaxies. It would have taken billions of years for primordial gas to coalesce into galaxies as large and bright as the Milky Way.

But in 2023, NASA’s James Webb Space Telescope (JWST) made a startling observation. With an ability to peer farther back in time than any observatory to date, the telescope uncovered a surprising number of bright galaxies as large as the modern Milky Way within the first 500 million years, when the universe was just 3 percent of its current age.

“The bright galaxies that JWST saw would be like seeing a clustering of lights around big cities, whereas theory predicts something like the light around more rural settings like Yellowstone National Park,” Shen says. “And we don’t expect that clustering of light so early on.”

For physicists, the observations imply that there is either something fundamentally wrong with the physics underlying the models or a missing ingredient in the early universe that scientists have not accounted for. The MIT team explored the possibility of the latter, and whether the missing ingredient might be early dark energy.

Physicists have proposed that early dark energy is a sort of antigravitational force that is turned on only at very early times. This force would counteract gravity’s inward pull and accelerate the early expansion of the universe, in a way that would resolve the mismatch in measurements. Early dark energy, therefore, is considered the most likely solution to the Hubble tension.

Galaxy skeleton

The MIT team explored whether early dark energy could also be the key to explaining the unexpected population of large, bright galaxies detected by JWST. In their new study, the physicists considered how early dark energy might affect the early structure of the universe that gave rise to the first galaxies. They focused on the formation of dark matter halos — regions of space where gravity happens to be stronger, and where matter begins to accumulate.

“We believe that dark matter halos are the invisible skeleton of the universe,” Shen explains. “Dark matter structures form first, and then galaxies form within these structures. So, we expect the number of bright galaxies should be proportional to the number of big dark matter halos.”

The team developed an empirical framework for early galaxy formation, which predicts the number, luminosity, and size of galaxies that should form in the early universe, given some measures of “cosmological parameters.” Cosmological parameters are the basic ingredients, or mathematical terms, that describe the evolution of the universe.

Physicists have determined that there are at least six main cosmological parameters, one of which is the Hubble constant — a term that describes the universe’s rate of expansion. Other parameters describe density fluctuations in the primordial soup, immediately after the Big Bang, from which dark matter halos eventually form.

The MIT team reasoned that if early dark energy affects the universe’s early expansion rate, in a way that resolves the Hubble tension, then it could affect the balance of the other cosmological parameters, in a way that might increase the number of bright galaxies that appear at early times. To test their theory, they incorporated a model of early dark energy (the same one that happens to resolve the Hubble tension) into an empirical galaxy formation framework to see how the earliest dark matter structures evolve and give rise to the first galaxies.

“What we show is, the skeletal structure of the early universe is altered in a subtle way where the amplitude of fluctuations goes up, and you get bigger halos, and brighter galaxies that are in place at earlier times, more so than in our more vanilla models,” Naidu says. “It means things were more abundant, and more clustered in the early universe.”

“A priori, I would not have expected the abundance of JWST’s early bright galaxies to have anything to do with early dark energy, but their observation that EDE pushes cosmological parameters in a direction that boosts the early-galaxy abundance is interesting,” says Marc Kamionkowski, professor of theoretical physics at Johns Hopkins University, who was not involved with the study. “I think more work will need to be done to establish a link between early galaxies and EDE, but regardless of how things turn out, it’s a clever — and hopefully ultimately fruitful — thing to try.”

“We demonstrated the potential of early dark energy as a unified solution to the two major issues faced by cosmology. This might be an evidence for its existence if the observational findings of JWST get further consolidated,” Vogelsberger concludes. “In the future, we can incorporate this into large cosmological simulations to see what detailed predictions we get.”

This research was supported, in part, by NASA and the National Science Foundation.

[videogamepolls]

Requested by @logan5124

[moneyisnobject]

"Amplitude"

M51 Concept

[voltrixz]

never become a self shipper that shit ruins YOUR LIFE!!! (< having a lot of fun actually)

[flavia8]

Me, reading a book where people live underwater and the mcs are scientists: :D

Me, when those characters describe something as "half a waves-breadth long:" D:

[poesia]

Foi em julho de 2019. Há cinco anos atrás saia o terceiro e idealizado-para-ser o último número de Amplitude. E da terceira para a segunda edição, o lapso fora já de três anos. Como um editor pode explicar uma periodicidade assim? Me ajude, amigo leitor!

Cara de pau por cara de pau, deixe-me replicar um trecho de minhas desculpas pelo enorme hiato entre a segunda e a terceira edições, citando a mim mesmo:

Neste tempo, pude dedicar-me, além dos compromissos acadêmicos, à edição de diversos livros e recursos em serviço da igreja e da Literatura, e à manutenção religiosa dos blogs de serviço.

Sim, nestes anos todos não cessamos de produzir livros e recursos, tanto  enquanto autor, quanto como organizador e editor (dê uma olhada em nossa biblioteca de recursos gratuitos, AQUI ). Mas nada podemos contra a verdade, senão pela verdade. E a verdade é que editar uma revista — ainda mais uma com as propostas de Amplitude — é trabalheira de assustar até a um editor já meio calejado. Por isso seu irregular avanço e eventual queda — queda não, tropeço — para o prático, embora doloroso, abandono.

No entanto, compreendemos por fim que Amplitude precisava viver. Mas as dificuldades permaneciam as mesmas; assim, como recolocá-la em sua jornada? A solução encontrada foi retomar as atividades entregando ao leitor uma revista mais enxuta, embora mantendo boa parte das seções que ditaram o estilo da publicação. Opa, na verdade criamos até novas seções, como a de Games ou a Pharmacia.

Com a retomada, inauguramos também a chamada para publicação, abrindo espaço para que autores submetam suas obras para a seleção e eventual veiculação na revista.

Amplitude é uma revista de posição e cosmovisão declaradamente protestante; no entanto, somos amplos em nossa irmanação criativa com nossos co-navegantes do mistério do Deus de Abraão, Isaque e Jacó: Cristãos de todas as vertentes podem ser lidos em Amplitude. Nesta edição, temos poesia e contos, crônicas e artigos, quadrinhos, resenhas de livros e até de games para refrigerar nossas almas.

O trabalho de Amplitude é fruto e consequência de um esforço de divulgação e promoção literárias iniciado no já longínquo ano de 2006, com o blog Poesia Evangélica. Até hoje, o blog já publicou em torno de 700 autores, desde iniciantes a grandes nomes do protestantismo brasileiro e mundial — alguns, de quem você jamais imaginaria terem escrito poemas. E o blog segue a todo vapor, com postagens a cada dez dias, em média. Não deixe de visitá-lo: www.poesiaevanglica.blogspot.com .

No mais, tenha uma boa leitura, e compartilhe esta revista com quantos você puder.

      Sammis Reachers, editor

PARA BAIXAR SEU EXEMPLAR PELO GOOGLE DRIVE, CLIQUE AQUI.

A revista também está disponível no Google Play Livros, AQUI.

Issuu, AQUI.

Scribd, AQUI.

SlideShare, AQUI.

[chiltern100]

[4gravitons]

At Quanta This Week, and Some Bonus Material

When I moved back to Denmark, I mentioned that I was planning to do more science journalism work. The first fruit of that plan is up this week: I have a piece at Quanta Magazine about a perennially trendy topic in physics, the S-matrix. It’s been great working with Quanta again. They’ve been thorough, attentive to the science, and patient with my still-uncertain life situation. I’m quite likely…

[zinkadear]

I made a family tree for Midas and Lorenzo's closest relatives. More members may be added at some point, such as kids for Redux and his wife, but I haven't decided on any yet.

Lorenzo's biological mother is at the top, and the two below her are his adoptive parents. He ends up reconnecting with his bio mom, but his bio dad will never be in the picture, so I'm not going to bother adding him. I haven't found a skin for him anyway, and it's not important.

Jules's mother passed away and is obviously no longer with Midas, which is why there's a dotted line between them.

This was fun to make! I won't be doing this with most pairings, but Midas and Lorenzo are very special to me, and I want to include their family in content.

[faceless-dude]

I couldn't help it

[west-brooke]

When I say girl dinner this is what I mean. Amp belongs to me, Proxy belongs to my buddy @phe0nomenal

Vigilante and sidekick tradition of getting burgers from their favorite fast food place after a successful mission. I think about these two absolutely constantly and now I’m subjecting everyone else to my nonsense.

[hillbilly---man]

27! (for the Spotify ask game)

27. Cherry Lips (Go Baby Go) - Garbage

You make the whole world want to dance

You bought yourself a second chance