Ice XI is the hydrogen-ordered form of Ih, the ordinary form of ice. Different phases of ice, from ice II to ice XVIII, have been created in the laboratory at different temperatures and pressures. The total internal energy of ice XI is about one sixth lower than ice Ih, so in principle it should naturally form when ice Ih is cooled to below 72 K. The low temperature required to achieve this transition is correlated with the relatively low energy difference between the two structures. Water molecules in ice Ih are surrounded by four semi-randomly directed hydrogen bonds. Such arrangements should change to the more ordered arrangement of hydrogen bonds found in ice XI at low temperatures, so long as localized proton hopping is sufficiently enabled; a process that becomes easier with increasing pressure. Correspondingly, ice XI is believed to have a triple point with hexagonal ice and gaseous water at (~72 K, ~0 Pa). (Wikipedia).
From playlist Music.
On board the German research vessel Polarstern
Video clips from Polarstern, a research vessel on an expedition off Antarctica for the Alfred Wegener Institute for Polar and Marine Research.
From playlist Ice Stories: Dispatches from Polar Scientists
Iceberg movements create eerie songs
Researchers have recorded and sped up the sounds that icebergs make as they scrape past each other, after an earthquake or as they break up. The resulting music makes for eerie listening. Read more: https://www.newscientist.com/article/dn14286-embracing-icebergs-sing-eerie-duets/
From playlist Ice Stories: Dispatches from Polar Scientists
Traveling the Antarctic Ice Sheet
http://icestories.exploratorium.edu On their way to measure GPS stakes on the West Antarctic Ice Sheet (WAIS), glaciologists walk us through their plan and gear for the ski-doo journey.
From playlist Ice Stories: Dispatches from Polar Scientists
Teach Astronomy - Climate and Earth's Orbit
http://www.teachastronomy.com/ Ice ages are periods of global cooling by a few degrees, up to ten or so degrees, that occur at irregular intervals of tens of thousands to hundreds of thousands of years. The causes of ice ages are complex, but over the past few million years, there is good
From playlist 26. Life on Earth
http://icestories.exploratorium.edu Join scientists as they walk 1km from their Antarctic home station to work on the South Pole Telescope.
From playlist Ice Stories: Dispatches from Polar Scientists
This video shows what the IceBridge team does on a day-to-day basis in Kangerlussuaq, Greenland, the base of operations for the mission's April 2014 flights. IceBridge, a six-year NASA mission, is the largest airborne survey of Earth's polar ice ever flown. It will yield an unprecedented
From playlist Support of global climate research
http://icestories.exploratorium.edu Watch scientists measure and tag a female ringed seal on the frozen Chukchi Sea. Follow them as they return the seal by snowmobile to her breathing hole in the Elson Lagoon - and get a little seal slap in the process. Featuring Dr. Brendan Kelly, Mic
From playlist Ice Stories: Dispatches from Polar Scientists
免費英文教學! 學英文要一步一步慢慢來. 一堂課完全熟練之前, 不要看下一堂. 這堂課我們學怎麼知道在名詞前加a 或 an, 然後我們學的單字裡那些詞是名詞, 形容詞和動詞. 詹祖華老師是為在澳洲教書長達十二年的高中老師,最擅長讓學生青出於藍而勝於藍。Youtube上已有超過兩百八十萬人看過他的教學視頻.
From playlist 學英文
ICE SKATING: People ice skating on a frozen pond (1927)
EMPIRE NEWS NEWSREEL (REUTERS) To license this film, visit https://www.britishpathe.com/video/VLVADZ8AV5ZZUBTDPNTOCPLEUV6IO-ICE-SKATING-PEOPLE-ICE-SKATING-ON-A-FROZEN-POND People ice skating on a frozen pond. Full Description: SLATE INFORMATION: Real Winter. Ice skating, so seldom pos
From playlist EMPIRE NEWS NEWSREEL (REUTERS)
Russia and China joining forces in the Arctic
As the #Arctic comes under the #geopolitical spotlight, distant #China feels obliged to sail north and carve out its own foothold. ✔ GET NORDVPN ► https://nordvpn.com/caspianreport ✔ USE COUPON CODE ► caspianreport ✔ USE THE CODE SO YOU CAN GET 70% off 3-year plan + 1 month free BAKU -
From playlist Geopolitics
Learn more math and science with brilliant.org, https://brilliant.org/blackpenredpen/ , first 200 people to sign up will get 20% off your subscription, and you can also support my channel! Thank you! Brilliant integration tricks: https://brilliant.org/wiki/integration-tricks/?utm_medium
From playlist [Math For Fun] Brilliant Problems
Chemistry - Nomenclature Fundamentals: XI Common Names (23 of 23)
Visit http://ilectureonline.com for more math and science lectures! In this video I will show you what are of the common names of some chemical formulas.
From playlist Michel van Biezen: CHEM - Introduction
The Strangest Encounters in Space | NASA's Unexplained Files (Full Episode)
Strange flying objects have been caught on NASA’s cameras and astronauts have reported seeing UFOs. Some can be identified; others remain a mystery. We’ll reveal NASA footage and interview the astronauts and scientists. Stream More Full Episodes of NASA's Unexplained Files: https://www.sc
From playlist Free Science Channel Episodes
Finiteness theorems for the space of holomorphic mappings by Jaikrishnan Janardhanan
PROGRAM CAUCHY-RIEMANN EQUATIONS IN HIGHER DIMENSIONS ORGANIZERS: Sivaguru, Diganta Borah and Debraj Chakrabarti DATE: 15 July 2019 to 02 August 2019 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Complex analysis is one of the central areas of modern mathematics, and deals with holomo
From playlist Cauchy-Riemann Equations in Higher Dimensions 2019
Natalja K Iyudu - Highly Noncommutative Words and Noncommutative Poisson Structures
I will talk on homology calculations for the higher cyclic Hochschild complex and on combinatorial description of Lie structure on highly noncommutative words. It is based on the texts: Arxiv:1906.07134 (J. ALgebra, 2020), preprints IHES M/19/14.
From playlist Combinatorics and Arithmetic for Physics: 02-03 December 2020
Symplectic Geometry and Quantum Noise - Leonid Polterovich
Leonid Polterovich Tel Aviv University and SCGP October 5, 2012 We discuss a quantum counterpart, in the sense of the Berezin-Toeplitz quantization, of certain constraints on Poisson brackets coming from "hard" symplectic geometry. It turns out that they can be interpreted in terms of the
From playlist Mathematics
Kimihiko Motegi: L-space knots in twist families and satellite L-space knots
Abstract: Twisting a knot K in S3 along a disjoint unknot c produces a twist family of knots {Kn} indexed by the integers. Comparing the behaviors of the Seifert genus g(Kn) and the slice genus g4(Kn) under twistings, we prove that if g(Kn)−g4(Kn) [is less than] C for some constant C for i
From playlist Topology
WEATHER: The Great Frost (1929)
EMPIRE NEWS NEWSREEL (REUTERS) To license this film, visit https://www.britishpathe.com/video/VLVA226BJCQT33L9YPBB3KVTBW854-WEATHER-THE-GREAT-FROST Children 'skating' on ice, men in boat on frozen lake and ice sculptures. Full Description: SLATE INFORMATION: The Great Frost brought ma
From playlist EMPIRE NEWS NEWSREEL (REUTERS)