New York State Drinking Testosterone 👌: 04/15/25

Tuesday, April 15, 2025

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Tuesday 15 April 2025

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What if JFK had never visited Dallas on 22 November 1963? What if Germany had won the First World War? How would life be different in America if the Southern states had beaten the North? What would a world without The Beatles sound like? Find out the potential answers to all these questions in the 'What If...' series from the All About History Team.

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‘It is the highest high’: Here's what Katy Perry and the 5 other women of Blue Origin's historic all-female flight felt after liftoff (videos)

Blue Origin launched an all-female crew into space | What the women of Blue Origin's all-female flight felt after | Solar blast unleashes 2 CMEs - auroras possible April 16

Created for znamenski.spacecom@blogger.com | Web Version

April 15, 2025

CONNECT WITH SPACE.COM

Something amazing every day.

The Launchpad

(Blue Origin)

Blue Origin launched an all-female crew into space

Blue Origin just launched pop star Katy Perry and five other women on the first manned rocket launch without a man on board since 1963.

Why it matters: Blue Origin made history Monday by launching an all-female crew to suborbital space. The crew included pop star Katy Perry, journalist Gayle King, former NASA scientist Aisha Bowe, filmmaker Kerianne Flynn, bioastronautics researcher Amanda Nguyễn, and journalist Lauren Sánchez (who also happens to be the fiancee of Blue Origin founder Jeff Bezos). The mission marked the first all-female spaceflight since 1963 and the first multiperson female-only spaceflight.

Watch the replay

(Blue Origin)

What the women of Blue Origin's all-female flight felt after

"It's oddly quiet when you get up there. It's really quiet and peaceful. And you look down at the planet, you think, 'That's where we came from?' And to me, it's such a reminder about how we need to do better, and be better human beings."

Watch now

Skywatching

(NASA / SDO and the AIA, EVE, and HMI science teams, helioviewer.org)

Solar blast unleashes 2 CMEs - auroras possible April 16

Heads up, aurora chasers! Earth's magnetic field is about to get a one-two punch from the sun - and the result could be an impressive show of northern lights stretching into mid-latitudes.

Spaceflight

(Blue Origin)

Amanda Nguyen becomes 1st Vietnamese woman in space

Amanda Nguyễn stepped out of a windowed white capsule in the West Texas desert on Monday (April 14), placed her hands firmly on her chest, then punched them toward the sky, beaming with joy. Having just flown beyond the Kármán line - recognized as the division between Earth and the rest of the universe - she'd just become the first Vietnamese woman to fly to space. She'd also just closed the loop on a dream she paused for 10 years to advocate for civil rights, keeping a promise to her younger self that she would "return to her."

Science & Astronomy

(Robert Lea (created with Canva))

Dark matter rolls through space like cosmic Easter Eggs

For some time, scientists have pondered a peculiar question: Can galaxies exist without an outer halo of dark matter? But new research flips this question around, investigating whether some dark matter haloes could exist without galaxies in their centers - like hollow Easter Eggs roaming the cosmos.

Technology

(Pulsar Fusion)

Pulsar Fusion unveils vision for 'Sunbird' nuclear rocket

When it comes to the future of space travel, nothing exceeds like excess. Pulsar Fusion hopes to demonstrate that axiom with its planned Sunbird nuclear fusion rocket, which is designed to travel at speeds of 329,000 mph (500,000 kph). That would make it the fastest self-propelled object ever created by humankind. (NASA's Parker Solar Probe has reached greater velocities during close solar flybys, thanks to the sun's powerful gravitational pull.)

Entertainment

(Bungie)

Bungie's next sci-fi shooter 'Marathon' has been revealed

To say there are tons of great-looking upcoming space games on the horizon is an understatement. From expansive action-RPGs to cosmic horror adventures, we have lots to look forward to, and now, we can add Bungie's Marathon to the list.

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Seminars Digest, Vol 74, Issue 3

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Today's Topics:

1. Friday 18.04.2025 (info+seminars@itp.ac.ru)
2. Thursday 17.04.2025 - ITP/CAS Colloquium (info+seminars@itp.ac.ru)

----------------------------------------------------------------------

Message: 1
Date: Tue, 15 Apr 2025 10:02:01 +0300
From: info+seminars@itp.ac.ru
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Friday 18.04.2025
Message-ID: <X7VaA3ynbmJImK6a8msw760S0UQDMaXOiULukwBzTc@wwwserv2>
Content-Type: text/plain; charset=UTF-8

Уважаемые коллеги!

На заседании Ученого совета ИТФ в пятницу 18.04 в 11:30 будет заслушан 1 доклад:
1). Н.А. Иногамов
Деформация кристаллитов, ползучесть на межзёренных границах и повышение шероховатости поверхности поликристаллической меди, облученной ультрафиолетовым наносекундным лазерным импульсом при нагреве до температуры ниже температуры плавления

The mechanisms of surface relief formation on bulk copper samples under the influence of UV laser pulses (duration 10 ns, wavelength 355 nm) in the mode of heating to temperatures below the melting temperature have been investigated. It has been experimentally established that during irradiation at energy densities of 0.60-1.05 J/cm2 a characteristic system of protrusions/depressions, the height/depth of which reaches up to 500 nm, is formed on the surface of the samples in local areas near grain boundaries. By methods of optical profilometry, confocal scanning laser microscopy and transmission electron microscopy the deformation nature of the formed relief was established. The thin near-surface layer near grain boundaries shows traces of plastic deformation development: nanoscale twin plates, dislocations and low-angle dislocation boundaries. Molecular dynamic modeling has shown that the main physical reason for the development of the considered relief is the anisotropy of thermal expansion of differently oriented grains (crystallites) during cyclic heating to pre-melt temperatures. It is established that thermomechanical stresses arising in the near-surface layer exceed the yield strength of the material, which leads to irreversible plastic deformation. The amplification of structural changes is shown to increase with both the energy density and the number of pulses. The results obtained are important for understanding the mechanisms of metal structure degradation under cyclic pulse thermomechanical loading and can be used, in particular, to develop methods for increasing the operational durability of metal optics.

Неласов И.В., Манохин С.С., Колобов Ю.Р., Жаховский В.В., Перов Е.А., Петров Ю.В., Хомич Ю.В., Малинский Т.В., Иногамов Н.А., Рогалин В.Е. // ЖЭТФ. – 2025. – Т. 167. – № 6.
Zhurnal Experimentalnoi i Teoreticheskoi Fiziki Vol. 167 (6) (2025).

ID и пароль онлайн-трансляций в Zoom те же, что и для предыдущих трансляций семинаров и докладов на Ученом совете:
https://zoom.us/j/96899364518?pwd=MzBsR2lYT0lYL2x2b1oyNU9LeWlWUT09
Meeting ID: 968 9936 4518
Пароль: 250319

При числе желающих не менее 5 будет организован автобус.
Для записи на автобус из Москвы в Черноголовку необходимо до 18:00 четверга отправить письмо на адрес электронной почты bus@itp.ac.ru
После этого записавшимся до 20:00 поступит подтверждение об отправке или неотправке автобуса в зависимости от числа записавшихся.
Запись на обратный автобус - на Ученом совете.

------------------------------

Message: 2
Date: Tue, 15 Apr 2025 10:02:03 +0300
From: info+seminars@itp.ac.ru
To: staff@itp.ac.ru, students@itp.ac.ru, seminars@itp.ac.ru
Subject: [Landau ITP Seminars] Thursday 17.04.2025 - ITP/CAS
Colloquium
Message-ID: <ZAwjhBDHTVQ7Sr986Pz2ZtvKNewhpDWxa06vi4DTGQ@wwwserv2>
Content-Type: text/plain; charset=UTF-8

Уважаемые коллеги!

На онлайн коллоквиум по теоретической физике в четверг 17.04 будут заслушаны 2 доклада:

1) 10:00:00 по московскому времени: Wei Li (Institute of Theoretical Physics, Chinese Academy of Sciences)
Tensor Networks Approach for 2D Correlated Electrons: Implications for High-Tc Superconductivity

Abstract
Two-dimensional correlated electronic systems present a fundamental challenge in condensed matter and quantum physics. Thermal tensor networks have emerged as a powerful tool for finite-temperature studies of many-electron systems. In this talk, I will present our recent advances in thermal tensor network methods, focusing on two recent developments: (1) exponential tensor renormalization group (XTRG), which achieves exponential acceleration through density matrix operator squaring, and (2) the efficient tangent-space tensor renormalization group (tanTRG) that incorporates time-dependent variational principle (TDVP) techniques. Our tensor network methods enable accurate low-temperature simulations of fundamental models like the Hubbard and t-J Hamiltonians, as well as material-specific applications such as the t-t'-J model for cuprates and the t-t-J⊥ model for bilayer nickelate superconductors.

Biography
Dr. Wei Li obtained his Ph.D. in Theoretical Physics from CAS in 2012, followed by postdoctoral research at Ludwig-Maximilians-Universität München (2012–2015). He served as an Associate Professor at Beihang University before joining the Institute of Theoretical Physics (ITP-CAS) as a Research Scientist in 2021. His research focuses on strongly correlated quantum systems, including quantum magnetism and correlated electron phenomena, development of novel tensor-network methods, and applications to cutting-edge problems in many-body physics. He has published over 80 papers in leading journals including Nature, Nature Physics, and PRL. He currently leads a CAS-sponsored Youth Innovation Team focused on foundational research in quantum many-body physics and applications.

2) 11:00:00 по московскому времени: Igor Burmistrov (L.D. Landau Institute of Theoretical Physics, Russian Academy of Sciences)
Dynamics of Phonons in Flexible Two-Dimensional Materials

Abstract
In this talk, I will discuss the microscopic theory for the attenuation of out-of-plane and in-plane phonons in free-standing and stressed flexible two-dimensional crystalline materials. In the free-standing case, it is possible to find exactly the scaling form of the attenuation, determine its small- and large-frequency asymptotes, and to derive the exact expression for the dynamical exponent of flexural phonons in the long-wave limit. In the stressed case, the presence of nonzero tension strongly reduces the relative magnitude of the phonon's attenuation and, consequently, results in parametrical narrowing of the phonon spectral line due to stress-controlled suppression of the retardation effects in the dynamically screened inter phonon interaction. I will discuss how suppression of the phonon attenuation by nonzero tension might be responsible for high quality factors of mechanical nanoresonators based on flexural two-dimensional materials.

Biography
Prof. Igor Burmistrov received two Ph.D.s in Theoretical Physics (in 2004 from Landau Institute and in 2006 from University of Amsterdam) and a Doctor of Physics and Mathematics degree in 2012 from Landau Institute. Since 2006, he is a permanent member of Landau Institute holding now the position of the deputy director. In 2017–2020, he was also a Humboldt fellow at Karlsruhe Institute of Technology. He is APS Outstanding Referee (2021). In 2022, he was elected as Professor of Russian Academy of Sciences. His research area includes electron transport in low dimensional systems, superconductivity, magnetism, elasticity of flexible two-dimensional materials, physics of open and dissipative systems. He has authored more than 110 peer-reviewed papers.

Zoom meeting ID: 890 7187 2369
Пароль: 544845

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