Why the Big Bang Definitely Happened | Space Time | PBS Digital Studios

                   

Why the Big Bang Definitely Happened | Space Time | PBS Digital Studios

Δημοσιεύτηκε στις 24 Φεβ 2016

How physics lets us rewind time to the beginning of the universe.

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We
pretty much know for sure that the universe was once extremely small,
and extremely hot. And we know that something set it in motion,
expanding rapidly and continuing to do-so today. But the actual moment
of ‘the Big Bang’ is still a bit of a grey area within physics. The
theories of general relativity and quantum mechanics disagree on this
pivotal “beginning of time,” and physicists continue to search for an
all-encompassing theory to unify the study of our universe. On this
week’s Space Time, we begin to discuss the current state of the Big Bang
Theory, and where it could go from here.

FURTHER READING:

Overview of Big Bang theory
https://en.wikipedia.org/wiki/Big_Bang

Timeline of the Big Bang
https://en.wikipedia.org/wiki/Chronol...

MinutePhysics made a truly superb video on what the Big Bang really is:
https://www.youtube.com/watch?v=q3MWR...

Kurzgesagt does a great job describing some of the events of the very early universe:
https://www.youtube.com/watch?v=wNDGg...

_____________________

COMMENTS:

Brendon Binns
https://www.youtube.com/watch?v=gw-i_...

David Mulyk
https://www.youtube.com/watch?v=gw-i_...

John Proctor
https://www.youtube.com/watch?v=gw-i_...

Lawrence Proctor
https://www.youtube.com/watch?v=gw-i_...

______________________

Written and hosted by Matt O’Dowd
Made by Kornhaber Brown (www.kornhaberbrown.com)

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 1/3/2016

Where do the elements come from? Nucleosynthesis in stellar environments

            

Where do the elements come from? Nucleosynthesis in stellar environments

Ζωντανή μετάδοση στις 16 Οκτ 2015

Presented by Anna Simon

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 3/2/2016

The Universe Inside of You - Where do all the Elements Come From? (Nucle...

                



The Universe Inside of You - Where do all the Elements Come From? (Nucle...

Ζωντανή μετάδοση στις 16 Οκτ 2015

Presented by Hendrik Schatz

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 3/2/2016

Neutrinos and Supernova Nucleosynthesis - Yong-Zhong Qian

     





Neutrinos and Supernova Nucleosynthesis - Yong-Zhong Qian

Δημοσιεύτηκε στις 23 Ιουλ 2014

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Big Bang nucleosynthesis

      

Big Bang nucleosynthesis

Δημοσιεύτηκε στις 27 Δεκ 2015

In
physical cosmology, Big Bang nucleosynthesis refers to the production
of nuclei other than those of the lightest isotope of hydrogen during
the early phases of the universe. Primordial nucleosynthesis is believed
by most cosmologists to have taken place from 10 seconds to 20 minutes
after the Big Bang, and is calculated to be responsible for the
formation of most of the universe's helium as the isotope helium-4,
along with small amounts of the hydrogen isotope deuterium, the helium
isotope helium-3, and a very small amount of the lithium isotope
lithium-7. In addition to these stable nuclei, two unstable or
radioactive isotopes were also produced: the heavy hydrogen isotope
tritium; and the beryllium isotope beryllium-7; but these unstable
isotopes later decayed into 3He and 7Li, as above.
Essentially all of
the elements that are heavier than lithium and beryllium were created
much later, by stellar nucleosynthesis in evolving and exploding stars.


This video is targeted to blind users.

Attribution:
Article text available under CC-BY-SA
Creative Commons image source in video

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 1/3/3016

BING BANG NUCLEOSYNTHESIS

BING BANG NUCLEOSYNTHESIS

AΝΑΔΗΜΟΣΙΕΥΣΗ ΑΠΟ ΤΟ ΒΙΒΛΊΟ "ΤΗE PHYSICS OF THE STARS" του
Α.C. Phillips                  29/2/2016

LIGO Gravitational Wave Observatory

                               



 LIGO Gravitational Wave Observatory

Ανέβηκε στις 30 Οκτ 2006

The
Laser Interferometer Gravitational Wave Observatory is spearheading the
completely new field of gravitational wave astronomy and opening a
whole new window on the universe. LIGO's exquisitely sensitive
instruments may ultimately take us farther back in time than we've ever
been, catching, perhaps, the first murmurs of the universe in formation.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 29/2/2016

The Origin of Chemical Elements

The Origin of Chemical Elements

Astronomers believe that the universe began some 15 billion years ago in an extraordinary moment they call the big bang. Initially, the temperature must have been inconceivably high, but after 1 second, it had dropped to 10 billion K about and subatomic particles began to form: protons, neutrons, and electrons. After 3 minutes, the temperature had dropped to 1 Billion K and protons began fusing with neutrons to form helium nuclei. Matter remained in this form for many millions of years until the expanding universe had cooled to about 10,000 K and electrons were then able to bind to protons and to helium nuclei, forming stable hydrogen and helium atoms.

Nanotechnology in the future - documentary

                 



Nanotechnology in the future - documentary

Δημοσιεύτηκε στις 4 Αυγ 2015

Nanotechnology in the future - documentary

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""20"" Things You Didn't Know About... Nanotechnology

1
Get small. A nanometer is about the width of a strand of DNA; if you
design, build, or use functional systems smaller than 100 of these,
you’re a nanotechnologist.

2 By that definition, we have been
doing nanotech for centuries. For instance, the colors in medieval
stained glass windows result from nanocrystals created in the heating
and cooling of the glass.

3 Size matters. At the nano scale,
materials take on unusual properties. Their color, transparency, and
melting point often differ significantly from those of larger clumps of
the same stuff.

4 Nanoscale bits of metal oxide, carbon fiber,
or metal blends can detoxify hazardous waste: Their extreme solubility
and chemical reactivity help them zero in on the nasty stuff.

5
This approach is already being used at sites in a dozen states, mostly
to clean groundwater fouled by solvents, metals, and petroleum.

6
Brighter colors! Richer flavors! Less spoilage! Those are some of the
reasons why companies are dumping nanoparticles into hundreds of
products, including cosmetics, sunscreens, and food.

7 Analysts say the global market for manufactured goods using nanomaterials could hit $1.6 trillion by 2013.

8
Uh-oh. Studies show that nanoparticles can work their way into the
bloodstream, penetrate cells, and get past the blood-brain barrier.
Research has linked such particles to lung damage; the brain may be
affected too.

9 But if those particles don’t kill us, they just
might save us. Scientists at U.C. San Diego have designed a fluorescent
nanoparticle that glows inside the body, making it easier to image
tumors and organ damage.

10 Yale researchers have created
plastic nanospheres that encapsulate proteins called cytokines, which
stimulate the immune system’s killer T-cells. An injection of those
spheres could help fight disease and infection.

11 And in a University of Southern California lab, nanotubes have been used to create synthetic neurons (pdf).

12
The USC team is trying to assemble these neurons into functional
networks, which would bring us closer to assistive brain implants.

13
In 1989, using an atomic force microscope, IBM engineer Don Eigler
became the first person to move and control a single atom.

14 Eigler and his team later used 35 xenon atoms to spell out “IBM,” thus performing the world’s smallest PR stunt.

15
Atoms? Big whoop. Researchers at Princeton and U.C. Santa Barbara can
control the spin of a single electron, trapping it in a “corral” created
by applying voltage to minuscule electrodes.

16 But they’re not
playing cowboy. The breakthrough could lead to powerful quantum
computers that store and manipulate data in the spin of individual
electrons.

17 Not to be outdone, Stan­ford scientists used
scanning tunneling microscopy and holograms to write information within
the interference patterns formed by electron waves on a copper sheet.
The letters are less than a third the size of Eigler’s “IBM.”

18
Government researchers have created arrays of chromium nanodots that
can store magnetic data with unprecedented uniformity. One goal: drawing
more complex integrated circuits on silicon chips.

19 For the
rodent who has everything. Georgia Tech scientists made piezoelectric
generators out of nanowires and attached them to tiny hamster jackets.
When the critters ran, the generators created electricity.

20
Zhong Lin Wang, co-inventor of the jacket, envisions a shirt that
charges your cell phone as you stroll, or an implanted device for
measuring blood pressure that’s powered by your own heartbeat.

Read and watch out more on these sources:
Source: http://goo.gl/KEZ2iT
Source: https://youtu.be/WZp6K-hDyAU

Find out more about documentary and documentaries
also
documentaries 2015 on our channel that share videos from bbc
documentary, national geographic,pds documentary, You can also read:
Keyword,Documentary,documentaries,nation­al geographic,bbc documentary.

Nanotechnology in the future

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 29/2/2016

Fireworks and Waterworks - with Andrew Szydlo

             



Fireworks and Waterworks - with Andrew Szydlo

Δημοσιεύτηκε στις 17 Φεβ 2016

Andrew
Szydlo returns with a visually spectacular performance explaining the
science along the way. Fiery reactions, colour-changing liquids and
gunpowder.
Subscribe for regular science videos: http://bit.ly/RiSubscRibe

Watch more from Andrew Szydlo here:
The Magic of Chemistry: https://youtu.be/0g8lANs6zpQ
Blaze of Steel: https://youtu.be/Na7Bp4frYGw

Andrew Szydlo is a chemist and secondary school teacher at Highgate School, well-loved by pupils and Ri attendees alike.

He
has given public lectures around the country, been featured on TV shows
and has become a popular part of the Ri Channel in recent years.

Watch more science videos on the Ri Channel http://richannel.org
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and Tumblr: http://ri-science.tumblr.com/
Subscribe for the latest science videos: http://richannel.org/newsletter

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ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 29/2/2016

Physics@FOM Veldhoven 2016 - Masterclass Tilman Esslinger

                     



Physics@FOM Veldhoven 2016  - Masterclass Tilman Esslinger

Δημοσιεύτηκε στις 22 Φεβ 2016

Prior
to Physics@FOM 2016, the programme committee organised four
masterclasses. These classes offer PhDs and young postdocs a unique
opportunity to receive an introduction to their discipline from top
researchers.

Quantum simulation with quantum gases
Quantum
simulations provide a means to study fundamental concepts in quantum
physics that may be hard to capture by other means. Key models of
quantum many-body physics, which were often invented to describe
electronic and magnetic properties of materials, are realized using the
highly controlled setting of atomic quantum gases. In this lecture
Esslinger provides an introduction to quantum simulation with quantum
gases and discusses examples, including Hubbard models, quantum
magnetism, artificial graphene and topological insulators.

About the conference:
Physics@FOM
Veldhoven is a large congress that provides a topical overview of
physics in the Netherlands. It is organised by the Foundation for
Fundamental Research on Matter (FOM) and takes place each year in
January. Traditionally, young researchers are given the chance to
present themselves and their work alongside renowned names from the
Dutch and international physics community. The programme covers Light
and matter, Atomic, molecular and optical physics, Nanoscience and
nanotechnology, Statistical physics and Soft condensed matter, Surfaces
and interfaces, Physics of fluids, Subatomic physics, Plasma and fusion
physics, and Strongly correlated systems.

http://www.fom.nl/veldhoven

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/2/2016

Physics@FOM Veldhoven 2016, Anton Zeilinger - Quantum teleportation and ...

              



Physics@FOM Veldhoven 2016, Anton Zeilinger - Quantum teleportation and ... 

Δημοσιεύτηκε στις 9 Φεβ 2016

Quantum teleportation, entanglement, and Einstein’s question, “What is light?”

It
is well known that Einstein received the Nobel Prize for the
groundbreaking idea of 1905, his annus mirabilis, that light consists of
particles, today called photons. In 1935, he discovered together with
Podolsky and Rosen that two quantum systems can be connected stronger
than in classical physics. For that situation the Austrian Nobel Prize
winner Erwin Schrödinger coined the name “entanglement” and called it
“the essential feature of quantum mechanics” while Einstein, dismissed
it as “spooky action at a distance”.

Technical progress in
creating and handling entangled photon states not only led to
experimental realization of such entangled states but also the discovery
of novel phenomena, including, for example, multi-particle entanglement
and quantum teleportation. These are not just intellectual curiosities,
but they lay the foundations for a new information technology, with
concepts such as quantum communication, quantum cryptography and quantum
computation.

In the talk, Zeilinger presents some of the most
recent experimental results, particularly on long-distance quantum
communication and on the implementation of quantum states in
higher-dimensional Hilbert spaces. He also discusses future possible
applications in quantum information systems. These will, for example,
include experiments using satellite-based quantum communication on a
worldwide scale.

Towards the end of his life Einstein commented
that despite years of conscious brooding, he did not come closer to
answering the question “What is light?” It would be fascinating to know
his position about these recent developments.

About the conference:
Physics@FOM
Veldhoven is a large congress that provides a topical overview of
physics in the Netherlands. It is organised by the Foundation for
Fundamental Research on Matter (FOM) and takes place each year in
January. Traditionally, young researchers are given the chance to
present themselves and their work alongside renowned names from the
Dutch and international physics community. The programme covers Light
and matter, Atomic, molecular and optical physics, Nanoscience and
nanotechnology, Statistical physics and Soft condensed matter, Surfaces
and interfaces, Physics of fluids, Subatomic physics, Plasma and fusion
physics, and Strongly correlated systems.
http://www.fom.nl/veldhoven

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/2/2016
  
  
  

"Love" Between Particles: Quantum Mechanics and Entanglement - Testing B...

                    

"Love" Between Particles: Quantum Mechanics and Entanglement - Testing B...

Δημοσιεύτηκε στις 14 Φεβ 2016

Here's
a love story at the smallest scales imaginable: particles of light. It
is possible to have particles that are so intimately linked that a
change to one affects the other, even when they are separated at a
distance.

This idea, called "entanglement," is part of the branch
of physics called quantum mechanics, a description of the way the world
works at the level of atoms and particles that are even smaller.
Quantum mechanics says that at these very tiny scales, some properties
of particles are based entirely on probability. In other words, nothing
is certain until it happens.

Testing Bell's Theorem

Albert
Einstein did not entirely believe that the laws of quantum mechanics
described reality. He and others postulated that there must be some
hidden variables at work, which would allow quantum systems to be
predictable. In 1964, however, John Bell published the idea that any
model of physical reality with such hidden variables also must allow for
the instantaneous influence of one particle on another. While Einstein
proved that information cannot travel faster than the speed of light,
particles can still affect each other when they are far apart according
to Bell.

Scientists consider Bell's theorem an important
foundation for modern physics. While many experiments have taken place
to try to prove his theorem, no one was able to run a full, proper test
of the experiment Bell would have needed until recently. In 2015, three
separate studies were published on this topic, all consistent with the
predictions of quantum mechanics and entanglement.

"What's
exciting is that in some sense, we're doing experimental philosophy,"
said Krister Shalm, physicist with the National Institute of Standards
and Technology (NIST), Boulder, Colorado. Shalm is lead author on one of
the 2015 studies testing Bell's theorem. "Humans have always had
certain expectations of how the world works, and when quantum mechanics
came along, it seemed to behave differently."

National Institute of Standards and Technology (NIST) Boulder, Colorado
http://www.ncbi.nlm.nih.gov/pubmed/26...

http://www.nasa.gov/feature/jpl/parti...

Decoded: How particles 'fall' in love this Valentine's
http://zeenews.india.com/news/science...

Images credit: Getty, Alamy, NASA/JPL-Caltech

Music credit: Lightning on a Blue Sky by Twin Musicom is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/...)
Artist: http://www.twinmusicom.org/

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 27/2/2016
  
  
  

NASA TV Media

              





NASA TV Media

Η μετάδοση ροής ξεκίνησε στις 29 Ιουν 2015

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  ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

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Training for Tour of Duty on the Space Station

                  



Training for Tour of Duty on the Space Station

Δημοσιεύτηκε στις 7 Ιαν 2016

This
footage shows training activities of the Expedition 47/48 crew,
including NASA astronaut Jeff Williams, in preparation for the crew’s
upcoming mission aboard the International Space Station. Williams, and
cosmonauts Alexey Ovchinin and Oleg Skripochka of Roscosmos (Russian
Federal Space Agency) will launch to the space station aboard a Soyuz
TMA-20M spacecraft March 18, 2016, from the Baikonur Cosmodrome in
Kazakhstan.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Next Space Station Crew Trains Outside Moscow

                

Next Space Station Crew Trains Outside Moscow

Δημοσιεύτηκε στις 25 Φεβ 2016

Expedition
47-48 Soyuz Commander Alexey Ovchinin and Flight Engineer Oleg
Skripochka of Roscosmos and Flight Engineer Jeff Williams of NASA and
their backups, Sergey Ryzhikov and Andrey Borisenko of Roscosmos and
Shane Kimbrough of NASA conducted final qualification training at the
Gagarin Cosmonaut Training Center in Star City, Russia Feb. 24 and 25.
Ovchinin, Williams and Skripochka are scheduled to launch on March 19,
Kazakh time, from the Baikonur Cosmodrome in Kazakhstan in the Soyuz
TMA-20M spacecraft for a six-month mission on the International Space
Station.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

From Mars to the multiverse: life, space and the cosmos

                 





From Mars to the multiverse: life, space and the cosmos

Ζωντανή μετάδοση στις 24 Φεβ 2016

Unmanned
spacecraft have visited the other planets of our Solar System (and some
of their moons), beaming back pictures of varied and distinctive worlds
- but none propitious for life.

But prospects are far more
interesting when we extend our gaze to other stars: most stars are, like
our Sun, orbited by retinues of planets. Our home galaxy contains a
billion planets like the Earth. Will post-humans one day visit some of
them? Or are they inhabited already? If so, are the 'aliens' organic or
'AI'.

Moreover, our Galaxy is one of billions visible with a
large telescope, which are all the aftermath of a cosmic 'big bang' 13.8
billion years ago.

More astonishing still, 'our' big bang may
not have been the only one, but merely a member of a vast (perhaps
infinite) ensemble.

This illustrated talk will address these
topics, and what this perspective means for the long-range future of
intelligence in the cosmos. Lord Rees will emphasise that the remarkable
advances in our science in recent decades are essentially owed to new
engineering and technology. Armchair theory alone doesn't get us far!

Interact online via the hashtag #LindsayLecture

Visit Imperial's What's On pages for more information: http://www3.imperial.ac.uk/newsandeve...

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Copy of From Mars to the multiverse: life, space and the cosmos

                        



Copy of From Mars to the multiverse: life, space and the cosmos

Δημοσιεύτηκε στις 25 Φεβ 2016

Unmanned
spacecraft have visited the other planets of our Solar System (and some
of their moons), beaming back pictures of varied and distinctive worlds
- but none propitious for life.

But prospects are far more
interesting when we extend our gaze to other stars: most stars are, like
our Sun, orbited by retinues of planets. Our home galaxy contains a
billion planets like the Earth. Will post-humans one day visit some of
them? Or are they inhabited already? If so, are the 'aliens' organic or
'AI'.

Moreover, our Galaxy is one of billions visible with a
large telescope, which are all the aftermath of a cosmic 'big bang' 13.8
billion years ago.

More astonishing still, 'our' big bang may
not have been the only one, but merely a member of a vast (perhaps
infinite) ensemble.

This illustrated talk will address these
topics, and what this perspective means for the long-range future of
intelligence in the cosmos. Lord Rees will emphasise that the remarkable
advances in our science in recent decades are essentially owed to new
engineering and technology. Armchair theory alone doesn't get us far!

Interact online via the hashtag #LindsayLecture

Visit Imperial's What's On pages for more information: http://www3.imperial.ac.uk/newsandeve...

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Ninth Planet Beyond Neptune?

                  



Ninth Planet Beyond Neptune?



Zωντανή μετάδοση στις 19 Φεβ 2016

Konstantin
Batygin & Mike Brown have recently uncovered evidence that a giant
planet in the outer reaches of our solar system is pushing around the
orbits of the most distant objects known beyond Neptune.

The
orbits of these distant objects, in what is called the Kuiper belt,
contain the gravitational clues which reveal how big the planet -- which
they call Planet Nine -- is and where it is hiding.

They have
embarked on a search for Planet Nine and hope that within a few years
astronomers will be studying the new planet for clues to its origin and
what information it holds about the formation of the solar system.

Please
join Tony Darnell, Alberto Conti and Harley Thronson as they discuss
the possibility of a ninth planet in our solar system. Please bring
your questions and comments as well!

JWST Documentary Trailer:
https://www.youtube.com/watch?v=qOKRu...

Follow DeepAstronomy on Twitter:
@DeepAstronomy

Like DeepAstronomy on Facebook:
https://www.facebook.com/DeepAstronomy/

Like Space Fan News on Facebook:
https://www.facebook.com/SpaceFan/

Follow DeepAstronomy on Google+
http://google.com/+DeepAstronomy
http://google.com/+TonyDarnell

We also have a great Google+ Community, come share your thoughts and join the discussion!
https://plus.google.com/communities/1...

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Prof Stephen Hawking Celebrates Gravitational Wave Discovery

              

Prof Stephen Hawking Celebrates Gravitational Wave Discovery

Δημοσιεύτηκε στις 11 Φεβ 2016

Prof Stephen Hawking celebrates gravitational wave discovery
Scientists are claiming a stunning discovery in their quest to fully understand gravity
They
have observed warping of space-time generated by the collision of two
black holes more than a billion light-years from Earth.
The international team says the first detection of gravitational waves will usher in a new era for astronomy.
One
of the UK's foremost experts on black holes, Prof Stephen Hawking, told
the BBC Pallab Ghosh that the discovery was groundbreaking.
Read more:
http://www.bbc.com/news/science-envir...
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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

How Far Away Is It - 2015 Update - Dark Matter (1080p)

                    

How Far Away Is It - 2015 Update - Dark Matter (1080p)

Δημοσιεύτηκε στις 10 Φεβ 2016

Welcome to our 2015 update.

Text at http://howfarawayisit.com/documents/

2015
marked the Hubble Space Telescope’s 25th anniversary. To celebrate,
they published a number of spectacular images. We’ll see:
•
Caverns carved out of dust by a new star in the Orion Nebula • The
Veil Nebula move • Through the Eagle Nebula • A spectacular view
of the center of our galaxy • Andromeda galaxy disk details like
we’ve never seen them before • A lonely galaxy on the edge of our
Local Void
• Hanny’s Voorwerp one of the strangest objects ever seen
We’ll also update Gaia’s progress, and take a look at Laniakea – a new way to identify superclusters.
The LHC at CERN reopened in 2015 after a two year upgrade.
Both
CERN and Hubble touched on Dark Matter over the past year, so we’ll
examine the evidence for Dark Matter (Coma Cluster, Bullet Cluster,
Gravitational Lensing, Fritz Zwicky, Vera Rubin, galaxy curves, etc.)
and discuss a few of the possibilities for what this mysterious material
might be (hydrogen, WIMPS, Neutrino).
I trust you’ll find it interesting and informative.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

NEW ALIEN SIGNAL FROM HABITABLE STAR DISCOVERED! 3/4/2014 SETI & DISCLOSURE

                 



NEW ALIEN SIGNAL FROM HABITABLE STAR DISCOVERED! 3/4/2014 SETI & DISCLOSURE

Δημοσιεύτηκε στις 3 Μαρ 2014

Must watch: "SMOKING GUN HD Alien Moon Structures FOUND! Giant Vehicles & Bases 6/9/2015"
➨ https://www.youtube.com/watch?v=tJ_uC...
-~-~~-~~~-~~-~-

Official SecureTeam Shirts Now Available! Visit http://secureteam.spreadshirt.com
SOURCE: http://www.naic.edu/science/wow_signa...
http://arxiv.org/pdf/1211.6470.pdf
3/4/2014
- SETI has discovered a new type of alien signal coming from space.
Unlike the original 1977 "WOW!" signal captured by SETI researchers at
Ohio State, this new signal captured in 2010 and again in 2012, comes
from an actual star some 100 light years away. Please subscribe and stay
tuned for more updates!

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Exoplanets spectroscopy with diffraction primary objective telescopes -T...

                  



Exoplanets spectroscopy with diffraction primary objective telescopes -T...

Δημοσιεύτηκε στις 22 Φεβ 2016

When
diffraction is employed as the primary collector modality of a
telescope instead of reflection or refraction, a new set of performance
capabilities emerges. A diffraction-based telescope forms a spectrogram
first and an image as secondary data. The results are startling. In
multiple object capability, the diffraction telescope on earth can
capture 2 million spectra to R bigger than 100,000 in a single night,
better for a census of exoplanets by radial velocity than any prior art.
In a space telescope in a direct observation mode, this type
diffraction primary objective could reveal spectral analyses of
individual exoplanets. We introduce three embodiments: THE MOST, HOMES
and ADEDPT.

Tom Ditto has served as a Fellow of NASA Advanced
Innovative Concepts and a P.I. in the National Science Foundation SBIR
program working in holographic optics. He is also a Fellow of the
Guggenheim Foundation, National Endowment for the Arts, and the American
Film Institute. He promises a rousing media presentation.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

Geology After Pluto - Jeff Moore (SETI Talks)

                       



Geology After Pluto - Jeff Moore (SETI Talks)

Δημοσιεύτηκε στις 19 Φεβ 2016

Jeff
Moore is the lead of the New Horizons Geology Team. He will talk about
the discoveries made by the New Horizons mission on the fascinating fly
by of the dwarf planet Pluto.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 26/2/2016

EPIDEMIOLOGY: THE SPREAD OF VIRUSES FROM PERSON TO PERSON

EPIDEMIOLOGY: THE SPREAD OF VIRUSES FROM PERSON TO PERSON
 

Viruses must be able to pass from one infected organism to another if they are to persist. The spread of specific viruses will be considered together with their other attributes in the chapters that follow, but it is useful to consider virus epidemiology in overview at this point. The tissues infected by a virus and the seriousness of the disease caused by it are attributes that determine in part the mechanism of spread of a virus. Thus, knowledge of the epidemiology of a virus is important for understanding the biology of its replication and pathology. We can discriminate several general ways in which animal viruses are spread: oral–fecal, airborne, bloodborne (including viruses that are spread by bloodsucking arthropods), sexual, and congenital. We can also distinguish human viruses that have humans as their major or only host (referred to here as human viruses), and viruses that are also associated with other animals (referred to as zoonoses).

Why Are Mosquitoes So Good at Carrying Disease?

              



Why Are Mosquitoes So Good at Carrying Disease?

Δημοσιεύτηκε στις 18 Ιαν 2016

Mosquitoes
are one of the most annoying bugs on this planet, but they are also one
of the most deadly. Why are they so good at carrying diseases?

Sign Up For The TestTube Newsletter Here ►►►► http://bit.ly/1myXbFG
Why Can’t We Get Rid of Mosquitoes ►►►►http://bit.ly/235CO3M

Read More:
Malaria Infected Mosquitoes Express Enhanced Attraction to Human Odor
http://journals.plos.org/plosone/arti...
“There
is much evidence that some pathogens manipulate the behaviour of their
mosquito hosts to enhance pathogen transmission. However, it is unknown
whether this phenomenon exists in the interaction of Anopheles gambiae
sensu stricto with the malaria parasite, Plasmodium falciparum - one of
the most important interactions in the context of humanity, with malaria
causing over 200 million human cases and over 770 thousand deaths each
year.”

Why vector mosquitoes don’t get affected by the viruses/plasmodium they transmit?
https://www.researchgate.net/post/Why...
“In
most cases of biological/obligatory transmission, there is a
mutualistic or a symbiotic relationship of some kind between insect
vectors and transmitted pathogens, which usually indicates a long
evolutionary relationship. In a few cases however, the pathogen affects
the vector negatively but not in a very serious way since in many cases
the vector is the only way for pathogen transmission in nature.”

____________________

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

Evidence grows for human to human transmission of deadly new coronavirus

             





Evidence grows for human to human transmission of deadly new coronavirus

Δημοσιεύτηκε στις 12 Μαΐ 2013

http://www.euronews.com/
The World Health Organisation (WHO) has confirmed that the potentially
fatal coronavirus could be transmitted from person to person. WHO
Assistant Director-General, Keiji Fukuda speaking to reporters during a
trip to Saudi Arabia where the majority of cases are found, noted that
the clusters of illnesses "increasingly supports the hypothesis" of
close contact human transmission.

The news comes as a second case
is reported in France. The new infection was discovered in a patient
who had shared a room at a hospital in Valenciennes with the first
confirmed sufferer. The two were said to be in close and prolonged
contact.

The SARS-like virus, produces symptoms of pneumonia and
can lead to kidney failure. Experts are looking at whether it is
transmitted via contact or whether it is airborne.

Professor
Benoit Guéry at the Lille Hospital Infection Unit said that there were,
"Several incidences where a clear human to human transmission was
possible." Though he played down the risk adding that , "As soon as we
are capable of dealing with patients in the appropriate manner, the
virus poses a very low risk (of transmission)."

Though the virus
poses a low transmission risk at present, the chances of survival are
slim. Medical experts report that once contracted the new coronavirus is
more aggressive than SARS (severe acute respiratory syndrome) which
killed around 800 people in 2003.

Two more carriers have died in
Saudi Arabia where the virus was first discovered, putting the death
toll to 18 with 34 cases worldwide.

With a survival rate of less
than 50%, authorities are taking the threat seriously. French travelers
to the Gulf are being advised to wash their hands regularly and avoid
contact with animals. Anyone returning from the region with flu-like
symptoms has been asked to report it immediately.

Find us on:
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Twitter http://twitter.com/euronews

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

The Ebola Virus - Signs, Symptoms and Transmission

              





The Ebola Virus - Signs, Symptoms and Transmission

Δημοσιεύτηκε στις 25 Αυγ 2014

Learn how you can safeguard yourself and your loved ones against the lethal pandemic of ebola go to: http://0e36b9wyac66-p39l7rbt92n6e.hop...
Ebola
virus disease (EVD) or Ebola hemorrhagic fever (EHF) is a disease of
humans and other primates caused by an ebola virus. Symptoms start two
days to three weeks after contracting the virus, with a fever, sore
throat, muscle pain and headaches. Typically, vomiting, diarrhea and
rash follow, along with decreased functioning of the liver and kidneys.
Around this time, affected people may begin to bleed both within the
body and externally.

The virus may be acquired upon contact with
blood or bodily fluids of an infected animal. Spreading through the air
has not been documented in the natural environment. Fruit bats are
believed to carry and spread the virus without being affected. Once
human infection occurs, the disease may spread between people, as well.
Male survivors may be able to transmit the disease via semen for nearly
two months. To make the diagnosis, typically other diseases with similar
symptoms such as malaria, cholera and other viral hemorrhagic fevers
are first excluded. To confirm the diagnosis, blood samples are tested
for viral antibodies, viral RNA, or the virus itself.

Signs and symptoms:
Signs
and symptoms of Ebola usually begin suddenly with an influenza-like
stage characterized by fatigue, fever, headaches, joint, muscle and
abdominal pain. Vomiting, diarrhea and loss of appetite are also common.
Less common symptoms include the following: sore throat, chest pain,
hiccups, shortness of breath and trouble swallowing. The average time
between contracting the infection and the start of symptoms (incubation
period) is 8 to 10 days, but it can vary between 2 and 21 days. Skin
manifestations may include a maculopapular rash (in about 50% of cases).
Early symptoms of EVD may be similar to those of malaria, dengue fever
or other tropical fevers, before the disease progresses to the bleeding
phase.
In 40–50% of cases, bleeding from puncture sites and mucous
membranes (e.g. gastrointestinal tract, nose, vagina and gums) has been
reported. In the bleeding phase, which typically starts 5 to 7 days
after first symptoms internal and subcutaneous bleeding may present
itself through reddening of the eyes and bloody vomit. Bleeding into the
skin may create petechiae, purpura, ecchymoses and hematomas
(especially around needle injection sites). Types of bleeding known to
occur with Ebola virus disease include vomiting blood, coughing it up or
blood in the stool. Heavy bleeding is rare and is usually confined to
the gastrointestinal tract. In general, the development of bleeding
symptoms often indicates a worse prognosis and this blood loss can
result in death. All people infected show some symptoms of circulatory
system involvement, including impaired blood clotting. If the infected
person does not recover, death due to multiple organ dysfunction
syndrome occurs within 7 to 16 days (usually between days 8 and 9) after
first symptoms.
Source: http://en.wikipedia.org/wiki/Ebola_vi...

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

How to Prevent HIV Transmission

                 





How to Prevent HIV Transmission

Δημοσιεύτηκε στις 14 Νοε 2012

http://waysandhow.com/

HIV,
or the human immunodeficiency virus, is a virus contracted by humans
that causes AIDS, or acquired immunodeficiency syndrome, which
compromises your immune system. This leaves you susceptible to all kinds
of conditions and diseases and will lead to eventual death. Today, it
is estimated that there are about 34 million carriers of the virus all
around the world. Everyday, they pose the risk of spreading the virus.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

Sexually transmitted Zika virus reported in Texas

              



Sexually transmitted Zika virus reported in Texas

Δημοσιεύτηκε στις 2 Φεβ 2016

Texas health officials reported the first case of sexual transmission of the Zika virus in the USA on Tuesday.

The
patient contracted the virus from a sexual partner who was ill with
Zika. The sexual partner became infected while traveling to Venezuela,
which has a Zika outbreak, the Dallas County Health and Human Services
said.

Although scientists have known for some time that Zika can
be transmitted through sex, the vast majority of cases are spread
through the bite of infected mosquitoes, much like malaria or West Nile
virus.

“Now that we know Zika virus can be transmitted through sex, this increases our awareness campaign in
educating
the public about protecting themselves and others,” said Zachary
Thompson, director of the Dallas County health department. "Next to
abstinence, condoms are the best prevention method against any sexually
transmitted infections.”

Although Zika infections are usually
mild and deaths are rare, health authorities are concerned because of a
link between the disease and a sharp increase in birth defects in
Brazil. The World Health Organization declared Monday that the Zika
outbreak is a "public health emergency of international concern."

Be Smarter. Faster. More Colorful and get the full story at http://usat.ly/1nF6iFe

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

HIV / AIDS Replication Animation Video

     

HIV / AIDS Replication Animation Video

Ανέβηκε στις 3 Αυγ 2010

For homework help, visit: http://biology-forums.com ...

Human
immunodeficiency virus (HIV) is a member of the retrovirus family that
causes acquired immunodeficiency syndrome (AIDS), a condition in humans
in which the immune system begins to fail, leading to life-threatening
opportunistic infections. Infection with HIV occurs by the transfer of
blood, semen, vaginal fluid, pre-ejaculate, or breast milk. Within these
bodily fluids, HIV is present as both free virus particles and virus
within infected immune cells. The four major routes of transmission are
unsafe sex, contaminated needles, breast milk, and transmission from an
infected mother to her baby at birth (vertical transmission). Screening
of blood products for HIV has largely eliminated transmission through
blood transfusions or infected blood products in the developed world.

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016

Flu Attack! How A Virus Invades Your Body

               





Flu Attack! How A Virus Invades Your Body

Ανέβηκε στις 23 Οκτ 2009

When
you get the flu, viruses turn your cells into tiny factories that help
spread the disease. In this animation, NPR's Robert Krulwich and medical
animator David Bolinsky explain how a flu virus can trick a single cell
into making a million more viruses.

See and hear the rest of the story on NPR.org: http://www.npr.org/templates/story/st...

Credit: Robert Krulwich, David Bolinsky, Jason Orfanon

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ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/2/2016