Announcement

Collapse

Forum Rules (Everyone Must Read!!!)

1] What you CAN NOT post.

You agree, through your use of this service, that you will not use this forum to post any material which is:
- abusive
- vulgar
- hateful
- harassing
- personal attacks
- obscene

You also may not:
- post images that are too large (max is 500*500px)
- post any copyrighted material unless the copyright is owned by you or cited properly.
- post in UPPER CASE, which is considered yelling
- post messages which insult the Armenians, Armenian culture, traditions, etc
- post racist or other intentionally insensitive material that insults or attacks another culture (including Turks)

The Ankap thread is excluded from the strict rules because that place is more relaxed and you can vent and engage in light insults and humor. Notice it's not a blank ticket, but just a place to vent. If you go into the Ankap thread, you enter at your own risk of being clowned on.
What you PROBABLY SHOULD NOT post...
Do not post information that you will regret putting out in public. This site comes up on Google, is cached, and all of that, so be aware of that as you post. Do not ask the staff to go through and delete things that you regret making available on the web for all to see because we will not do it. Think before you post!


2] Use descriptive subject lines & research your post. This means use the SEARCH.

This reduces the chances of double-posting and it also makes it easier for people to see what they do/don't want to read. Using the search function will identify existing threads on the topic so we do not have multiple threads on the same topic.

3] Keep the focus.

Each forum has a focus on a certain topic. Questions outside the scope of a certain forum will either be moved to the appropriate forum, closed, or simply be deleted. Please post your topic in the most appropriate forum. Users that keep doing this will be warned, then banned.

4] Behave as you would in a public location.

This forum is no different than a public place. Behave yourself and act like a decent human being (i.e. be respectful). If you're unable to do so, you're not welcome here and will be made to leave.

5] Respect the authority of moderators/admins.

Public discussions of moderator/admin actions are not allowed on the forum. It is also prohibited to protest moderator actions in titles, avatars, and signatures. If you don't like something that a moderator did, PM or email the moderator and try your best to resolve the problem or difference in private.

6] Promotion of sites or products is not permitted.

Advertisements are not allowed in this venue. No blatant advertising or solicitations of or for business is prohibited.
This includes, but not limited to, personal resumes and links to products or
services with which the poster is affiliated, whether or not a fee is charged
for the product or service. Spamming, in which a user posts the same message repeatedly, is also prohibited.

7] We retain the right to remove any posts and/or Members for any reason, without prior notice.


- PLEASE READ -

Members are welcome to read posts and though we encourage your active participation in the forum, it is not required. If you do participate by posting, however, we expect that on the whole you contribute something to the forum. This means that the bulk of your posts should not be in "fun" threads (e.g. Ankap, Keep & Kill, This or That, etc.). Further, while occasionally it is appropriate to simply voice your agreement or approval, not all of your posts should be of this variety: "LOL Member213!" "I agree."
If it is evident that a member is simply posting for the sake of posting, they will be removed.


8] These Rules & Guidelines may be amended at any time. (last update September 17, 2009)

If you believe an individual is repeatedly breaking the rules, please report to admin/moderator.
See more
See less

News in Science

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • #61
    Re: News in Science

    Scientists Discover a Bunch of New Potentially Habitable Planets




    455

    71

    19:15 02.05.2016(updated 19:24 02.05.2016)

    Astronomers have discovered three Earth-like planets in the "habitable zone" of a star, suggesting that the celestial trio might have liquid water.


    WASHINGTON (Sputnik) — Three exoplanets resembling Earth have been discovered orbiting an ultra-cool dwarf star dubbed TRAPPIST-1, an international group of astronomers said in the interdisciplinary scientific journal Nature on Monday.


    ​"We report observations of three short-period Earth-sized planets transiting an ultra-cool dwarf star only 12 parsecs away," the report stated.



    The discovered planets, located about 40 light years away, reportedly have features similar to Earth, which means they could be habitable.


    ​Scientists sometimes call these objects 'Goldilocks' planets because they're just the right distance from their host star to make life on them possible.

    The three planets spotted in constellation Aquarius are also the first to be found orbiting an ultracool dwarf star, which was hard to find because it is small and faint.


    Read more: http://sputniknews.com/art_living/20...#ixzz47WVLAItJ
    Hayastan or Bust.

    Comment


    • #62
      Re: News in Science

      NEW LIGHT A possible new particle shows up in proton collisions at the Large Hadron Collider that produce two photons, as in an event (illustrated here) seen by the CMS detector.




      CMS/CERN


      EMail logo EMail


      Print logo Print


      Twitter logo Twitter


      Facebook logo Facebook


      Reddit logo Reddit


      Google+ logo Google+




      Sponsor Message



      <a href="https://g.adspeed.net/ad.php?do=clk&amp;zid=47245&amp;wd=300&amp;ht=250& amp;pair=as" target="_top"><img style="border:0px;" src="https://g.adspeed.net/ad.php?do=img&amp;zid=47245&amp;wd=300&amp;ht=250& amp;pair=as" alt="i" width="300" height="250"/></a>




      Physicists may soon know if a potential new subatomic particle is something beyond their wildest dreams — or if it exists at all.

      Hints of the new particle emerged last December at the Large Hadron Collider. Theorists have churned out hundreds of papers attempting to explain the existence of the particle —assuming it’s not a statistical fluke. Scientists are now beginning to converge on the most likely explanations.

      “If this thing is true, it’s huge. It’s very different than what the last 30 years of particle physics looked like,” says theoretical physicist David Kaplan of Johns Hopkins University.

      The speculation was triggered by a subtle wiggle in data from two experiments, ATLAS and CMS, at the Large Hadron Collider at CERN (SN: 1/9/16, p. 7). The bump suggests a new particle that decays into two photons, but what that particle might be is unclear — its properties don’t line up with scientists’ expectations.

      “I’m not aware of anybody who’d predicted the existence of such a particle,” says John Ellis of King’s College London. “There’s a dish on the table that nobody can remember ordering.”

      More than 300 papers online at arXiv.org take a shot at explaining the potential particle’s origins, and on April 12, Physical Review Letters published four papers, selected to give a sense of the kinds of theories that could explain the observations.

      One of the most plausible explanations, scientists say, is that the particle is a composite, made up of smaller constituents, much like protons and neutrons are made of quarks. The strong nuclear force binds quarks in these nucleons; the new particle would be composed of quarklike particles held together by a new type of strong force. “I think that that’s the model that works the best with the data,” says theoretical physicist Kathryn Zurek of Lawrence Berkeley National Laboratory in California.

      The particle could also be similar to the Higgs boson — which was discovered at the LHC in 2012 (SN: 7/28/12, p. 5) — but with a mass six times as large. Still other theories propose that the possible new particle is a graviton, which is believed to transmit the force of gravity. The biggest constraint on devising a theory, or model, to explain the new particle’s origins is that it has so far revealed itself in only one type of decay, where it produces two photons. If it decays to two photons, says theoretical physicist Matthew Buckley of Rutgers University in Piscataway, N.J., “you might expect that it also goes to other things, and the fact that we don’t see that makes it difficult for many models to be right.”

      Additionally puzzling is that the particle doesn’t seem to easily solve any of the major mysteries of particle physics. It doesn’t provide an obvious explanation for dark matter, an unidentified substance that makes up more than 80 percent of the matter in the universe. And it doesn’t easily explain a persistent puzzle known as the hierarchy problem, which is related to the mass of the Higgs. According to theory, physicists would naively expect the Higgs to have an enormously large mass, but for unknown reasons, it is found at a much lower scale.

      Many physicists had pinned their hopes for solving these problems on a theoretical concept called supersymmetry, which proposes that each known particle has a heavier partner. But although theorists have concocted supersymmetric explanations for the particle, it doesn’t seem to fit easily into that box, either. “This thing doesn’t smell like supersymmetry,” says Maria Spiropulu of Caltech, an experimental particle physicist with CMS.

      The lack of simple explanations makes some physicists more skeptical that the particle really exists. Instead, they think it’s more likely just a blip that will disappear with more data. “If it had been something that was confidently expected in some well-motivated scenario like supersymmetry, then I think people would be a lot more confident about its reality,” says Ellis.

      The LHC experiments are currently gearing up to resume taking data after a few months on hiatus. So scientists expect answers by the summer, when more data could provide additional details — or make the hints of a new particle evaporate.

      Updated analyses presented by ATLAS and CMS in March strengthened the case slightly, making physicists more optimistic that the hints will hold up with more data. Notably, says Spiropulu, the first signs of the long-sought Higgs boson showed up in a similar fashion before they were confirmed. So, she says, theoretical physicists have a license to be excited. “It is expected that they will run amok.”



      Citations



      R. Garisto. Editorial: Theorists React to the CERN 750 GeV Diphoton Data. Physical Review Letters. Vol. 116, April 15, 2016, p. 150001. doi: 10.1103/PhysRevLett.116.150001.

      M. Delmastro. Diphoton searches in ATLAS, 51st Rencontres de Moriond EW 2016, La Thuile, Italy, March 17, 2016.

      P. Musella. Diphoton Searches in CMS, 51st Rencontres de Moriond EW 2016, La Thuile, Italy, March 17, 2016.


      Further Reading



      A. Grant. LHC restart provides tantalizing hints of a possible new particle. Science News. Vol. 189, January 9, 2016, p. 7.

      T. Siegfried. Higgs mass isn't natural, but maybe it shouldn't be. Science News Online, October 22, 2013.
      Hayastan or Bust.

      Comment


      • #63
        Re: News in Science

        US03:24 07.12.2016(updated 03:34 07.12.2016) Get short URL125230NASA’s Saturn-orbiting spacecraft Cassini passed through the plane of Saturn’s outer ring this week, flying approximately 57,000 miles above the ringed-planet’s clouds.In making a few minor adjustments, NASA’s team is confident that the data it will collect in this latest phase of its mission will help to reach agency goals. The upcoming dives are expected to produce the best views of Saturn’s outer rings to date, as well as close images of a nearby moon of the gas giant.

        "We’re in excellent shape to make the most of this new phase of the mission," Earl Maize, Cassini’s lead project manager, said in a statement. The small adjustments described by NASA include performing a short engine burn of the spacecraft’s main engine and closing the engine cover to form a protective canopy prior to transiting the the rocky ring plane. Cassini has made several groundbreaking discoveries, including finding a global ocean on the moon Enceladus, and identifying what are believed to be liquid methane seas on the moon Titan. © Flickr/ Kevin GillCassini Spacecraft Embarks on Ring-Skimming Mission of Saturn Cassini will make about 20 outer ring-grazing dives between November 30, 2016, and April 22, 2017, before plunging down between the planet and its inner-most rings on April 26, 2017, according to NASA. Each of the 20 plunges will last about a week. During the passes, Cassini’s instruments and imaging devices will sample the particles that form Saturn’s famous rings. The mission will conclude September 15, 2017, when the spacecraft will be directed into the atmosphere of the gas giant, continuing to relay data back to NASA "until its signal is lost." ...30

        Read more: https://sputniknews.com/us/201612071...n-rings-first/
        Hayastan or Bust.

        Comment


        • #64
          Re: News in Science

          Russian scientists were able to successfully test-fire the nation’s very own railgun – a weapon that relies on electromagnetic forces rather than explosive propellant to launch projectiles at incredibly high speed.During the test, conducted by scientists of the Russian Academy of Sciences’ Joint Institute for High Temperatures, the railgun fired a 15-gram plastic pellet which hit a solid aluminum target at a speed of approximately 3 kilometers per second, leaving a huge dent at the point of impact.

          It should be noted that this is far from the first test of this type of weapon in Russia, as the first test-fire of a Russian railgun was conducted in July. Railguns employ electromagnetic conductors instead of more conventional propellant like gunpowder or explosives to launch projectiles at incredibly high speed and inflicting major damage on impact. Scientists believe that the railgun can become not just a powerful weapon for the Russian military but also can theoretically be used to shoot down dangerous space objects on a collision course with Earth.

          Read more: https://sputniknews.com/science/2016...ailgun-trials/
          Hayastan or Bust.

          Comment


          • #65
            Re: News in Science

            Latest on Cassini
            http://www.cbsnews.com/news/cassini-...saturns-rings/
            Hayastan or Bust.

            Comment


            • #66

              Phys.org

              June 29 2017






              Genetic evidence from the South Caucasus region shows surprising long-term stability

              June 29, 2017

              Genetic evidence from the South Caucasus region shows surprising long-term stability
              Human remains, excavated in Armenia, that were used for ancient DNA analyses. The remains are from an Early Iron Age (9th century BC) individual excavated in Kapan, burial 6, skeleton 1. Credit: Pavel AvetisyanThe South Caucasus—home to the countries of Georgia, Armenia, and Azerbaijan—geographically links Europe and the Near East. The area has served for millennia as a major crossroads for human migration, with strong archaeological evidence for big cultural shifts over time. And yet, surprisingly, ancient mitochondrial DNA evidence reported in Current Biologyon June 29 finds no evidence of any upheaval over the last 8,000 years.
              Mitochondria are passed from mothers to their children. Therefore, the study of mitochondrial genomes enables scientists to trace the unique history of females over time.
              "We analyzed many ancient and modern mitochondrial genomes in parts of the South Caucasus and found genetic continuity for at least 8,000 years," said Ashot Margaryan and Morten E. Allentoft from Centre for GeoGenetics at the Natural History Museum of Denmark. "In other words, we could not detect any changes to the female gene pool over this very long time frame. This is highly interesting because this region has experienced multiple cultural shifts over the same time period, but these changes do not appear to have had a genetic impact—at least not on the female population."
              The researchers were interested to study this part of the world because of its position as a cultural crossroads since ancient times. It's also known as an important area for the potential origin and spread of Indo-European languages.
              To shed light on the maternal genetic history of the region, the researchers analyzed the complete mitochondrial genomes of 52 ancient skeletons from present-day Armenia and Artsakh, an unrecognized republic bordering Armenia and Azerbaijan. Those specimens span 7,800 years of history. Allentoft's team combined this new data with 206 mitochondrial genomes of modern Armenians and previously published data representing more than 480 individuals from seven neighboring populations.
              Genetic evidence from the South Caucasus region shows surprising long-term stability
              Human remains, excavated in Armenia, that were used for ancient DNA analyses. The remains are of a Middle Bronze Age (17th century BC) individual excavated in Karashamb, burial 462. Credit: Pavel AvetisyanTheir analyses suggest that the population size in the region rapidly increased after the last glacial maximum, about 18,000 years ago. The researchers also used several sophisticated analyses to test five different demographic scenarios that could explain the formation of the modern Armenian gene pool. Despite well-documented cultural shifts in the South Caucasus across the time period in question, their results strongly favor genetic continuity in the maternal gene pool, the researchers report.
              The findings imply that the female population in at least some parts of the South Caucasus has been highly stable through many cultural shifts that have occurred over thousands of years. They also suggest that documented migrations into this region during the last 2,000 to 3,000 years have had little genetic impact on the local female population.
              Margaryan says the findings suggest either that cultural shifts occurred primarily through the exchange of ideas or that it was primarily men who moved into new territories, bringing new cultural ideas along with them.
              The researchers say the next step is to explore these questions in whole-genome data to see if it tells the same story. They also hope to expand the study by including both modern and ancient samples from neighboring countries, which could involve collaborations with researchers in Georgia and Azerbaijan.
              More information: Current Biology, Margaryan and Derenko et al.: "Eight Millennia of Matrilineal Genetic Continuity in the South Caucasus" http://www.cell.com/current-biology/fulltext/S0960-9822(17)30695-4 , DOI: 10.1016/j.cub.2017.05.087
              https://m.phys.org/news/2017-06-genetic-evidence-south-caucasus-region.html

              Hayastan or Bust.

              Comment

              Working...
              X