The Dynamics of the Yellowstone Hydrothermal System - Shaul Hurwitz (SET...

   

The Dynamics of the Yellowstone Hydrothermal System - Shaul Hurwitz (SET...



Δημοσιεύτηκε στις 30 Μαρ 2015

The
Yellowstone Plateau Volcanic Field is characterized by extensive
seismicity, episodes of uplift and subsidence, and a hydrothermal system
that comprises more than 10,000 thermal features. Some of the recent
advances include more refined geophysical images of the magmatic system,
characterization of fluid sources and water-rock interactions,
quantitative estimates of heat and magmatic volatile fluxes, discovering
and quantifying the role of thermophile microorganisms in the
geochemical cycle, defining possible links between hydrothermal
activity, deformation, and seismicity; quantifying the dynamics of
geyser eruptions, and the discovery of extensive hydrothermal activity
in Yellowstone Lake.

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  • Τυπική άδεια YouTub
  ΑΝΑΡΤΗΣΗ ΑΠΌ ΤΟ YOUTUBE 6/4/2015
  
  
  

Saturn's Rings: An Accessible Astrophysical Disk - Matthew Tiscareno (SE...

  

Saturn's Rings: An Accessible Astrophysical Disk - Matthew Tiscareno (SE...

Δημοσιεύτηκε στις 3 Απρ 2015

Saturn's
ring system is an astrophysical disk that is neither light-years away
nor billions of years in the past. We can visit this disk at close range
and observe a number of phenomena that also operate in disks of other
kinds. As a result, we see small-scale processes that shape ring
texture, connect those processes to the bodies and structures that cause
them, and watch closely as the disk changes with time.

We will
discuss recent Cassini observations that elucidate disk processes
including 1) "self-gravity wakes" and "spiral density waves," both of
which were originally proposed for galaxies but are observed with
exquisite precision in Saturn's rings, 2) "propeller" features caused by
100-meter to km-sized moonlets embedded in the disk; these are the
first objects ever to have their orbits tracked while embedded in a
disk, rather than orbiting in free space, and hold the potential of
deepening our understanding of planetary migration, and 3) irregular
edge shapes in the gaps opened up by larger moons (10 km and more),
which may hold clues to angular momentum transport.

AΝΑΡΤΗΣΗ ΑΠΌ ΤΟ YOUTUBE 6/4/2015

Public Lecture | Starting From the Bottom: The Hunt for New Physics at t...

   

Public Lecture | Starting From the Bottom: The Hunt for New Physics at t...

Δημοσιεύτηκε στις 29 Ιαν 2015

The
Large Hadron Collider (LHC), the giant particle accelerator at the CERN
laboratory in Geneva, Switzerland, will restart operations in 2015, at
higher energies and intensities than ever before. In its first run, the
LHC experiments ATLAS and CMS discovered the long-sought Higgs boson.
Now, researchers are gearing up to search for new and even more exotic
phenomena. Many of the possibilities involve particles that decay to the
bottom quark, a rare and unusual species of quark with a distinctive
appearance in particle detectors. Identifying and measuring bottom
quarks in LHC collisions requires extremely high-speed silicon pixel
detectors. In this lecture, SLAC's Michael Kagan describes the
cutting-edge technology used to image bottom quarks and its use in the
search for new types of elementary particles that might appear at very
high energies.

About the Speaker:

Michael Kagan studied
physics and mathematics at the University of Michigan, graduating in
2006. He obtained his PhD from Harvard University in 2012 for his work
on measurements of the W and Z bosons with the ATLAS experiment at the
LHC. He joined SLAC in 2012 as a research associate. In this role, he
has spent a large portion of his time at CERN helping to build a new
layer of high-speed silicon pixel detectors for the ATLAS experiment. He
also works on improving pattern recognition algorithms for finding b
quarks in ATLAS data and using these b quarks to study Higgs bosons and
search for exotic signatures of new physics.

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  • Τυπική άδεια YouTube
  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 4/3/2015
  
  
  

LHC Restart: Jon Butterworth at the Royal Institution

  

LHC Restart: Jon Butterworth at the Royal Institution

Δημοσιεύτηκε στις 30 Μαρ 2015

Jon
Butterworth, a veteran of the hunt for the Higgs boson, explains what's
next for the Large Hadron Collider (LHC) during his 2014 talk at the
Royal Institution. Don't miss Butterworth's LIVE public lecture webcast
at Perimeter Institute on April 1, 2015: http://www.perimeterinstitute.ca/outr...

Watch the full Royal Institution talk here: https://youtu.be/aN4zmEY9i_U

Join the conversation
www.twitter.com/perimeter
www.facebook.com/pi_outreach
www.perimeterinstitute.ca

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  • Τυπική άδεια YouTube
  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 4/3/2015
  
  
  

The Most Wanted Particle

   

The Most Wanted Particle

Ζωντανή μετάδοση στις 1 Απρ 2015

In
what promises to be a smashing public lecture, Jon Butterworth will
give a personal account of what it is like to work on the largest
experiment ever built, the Large Hadron Collider at CERN. He will
recount the excitement and tension surrounding the quest, under
unprecedented media and public attention, to find the famous Higgs
boson. Butterworth, a physics professor at University College London
(UCL), will explain the motivation and importance of the Higgs search,
discuss his specific research at CERN’s ATLAS detector, and speculate on
the exciting breakthroughs that still await in the world of high-energy
physics.

http://www.perimeterinstitute.ca/outr...

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  • Τυπική άδεια YouTube
  ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 4/3/2015
  
  
  

The Higgs Boson and the Fate of the Universe - Joseph Lykken (SETI Talks)

    



The Higgs Boson and the Fate of the Universe - Joseph Lykken (SETI Talks)

Δημοσιεύτηκε στις 4 Σεπ 2014

Abstract:
The discovery of the Higgs boson at the CERN Large Hadron Collider
poses new challenges to our understanding of basic quantum physics.
Unless other new physics intervenes, we appear to live in a universe
that is slightly unstable and will eventually decay catastrophically.
Supersymmetry can stabilize the vacuum, but so far searches for
superpartner particles at the LHC have come up empty. New ideas jettison
supersymmetry, and instead connect the Higgs boson to dark matter.

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  • Τυπική άδεια YouTube
  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 1/3/2015
  
  
  

the Higgs Paradox

   



the Higgs Paradox

Δημοσιεύτηκε στις 24 Αυγ 2012

LATEST
FROM CERN: Though it is clear that the Higgs particle has been
discovered, it is becoming more clear that there are deviations from
prediction. With CMS data (http://cds.cern.ch/record/1728249?ln=en) beginning to lean more towards displaying the same "Twin Peaks" anomaly found in the ATLAS data (http://arxiv.org/pdf/1406.3827v1.pdf),
but in reverse, physicists appear to be more aware of a "Higgs Paradox"
developing. See physicist discuss these issues in the latest Hangout
with CERN video, "Higgs news and more! (S04E04)" (Hangout with CERN:
Higgs news and more! (S04E04)).

SUPPORTING MATERIAL: Fermilab's
Don Lincoln presents data regarding the newly found Higgs particle,
which, according to Lincoln, appears to indicate the need for new
physics. The updated data presented by Lincoln remains consistent with
the data used to suggest a "Higgs Paradox" (Don Lincoln June 2013: The
Energy Frontier of Physics (http://youtu.be/G7bQVeF7bbA))

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 1/4/2015