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Mars Base

Wireless signals could transform brain trauma diagnostics - 0 views

medicalxpress.com/...-brain-trauma-diagnostics.html

scibyte94 brain

shared by Mars Base on 15 May 13 - No Cached
  • New technology
  • is using wireless signals to provide real-time, non-invasive diagnoses of brain swelling or bleeding.
  • The device analyzes data from low energy, electromagnetic waves, similar to the kind used to transmit radio and mobile signals
  • ...15 more annotations...
  • The technology
  • could potentially become a cost-effective tool for medical diagnostics and to triage injuries in areas where access to medical care, especially medical imaging, is limited
  • The researchers tested a prototype in a small-scale pilot study of healthy adults and brain trauma patients admitted to a military hospital for the Mexican Army
  • The results from the healthy patients were clearly distinguishable from those with brain damage, and data for bleeding was distinct from those for swelling
  • symptoms of serious head injuries and brain damage are not always immediately obvious, and for treatment, time is of the essence.
  • The researchers took advantage of the characteristic changes in tissue composition and structure in brain injuries
  • For brain edemas, swelling results from an increase in fluid in the tissue
  • For brain hematomas, internal bleeding causes the buildup of blood in certain regions of the brain.
  • Because fluid conducts electricity differently than brain tissue, it is possible to measure changes in electromagnetic properties.
  • Computer algorithms interpret the changes to determine the likelihood of injury.
  • The study involved 46 healthy adults, ages 18 to 48, and eight patients with brain damage, ages 27 to 70.
  • engineers fashioned two coils into a helmet-like device, fitted over the heads of the study participants
  • One coil acts as a radio emitter and the other serves as the receiver. Electromagnetic signals are broadcast through the brain from the emitter to the receiver
  • the waves are extremely weak, and are comparable to standing in a room with the radio or television turned on
  • The device's diagnoses for the brain trauma patients in the study matched the results obtained from conventional computerized tomography (CT) scans
Mars Base

Kepler Planet-Hunting Mission in Jeopardy - 0 views

www.universetoday.com/...net-hunting-mission-in-jepardy

scibyte94 Kepler

shared by Mars Base on 16 May 13 - No Cached
  • NASA’s Kepler telescope has lost its ability to precisely point toward stars
  • One of the reaction wheels –devices which enable the spacecraft to aim in different directions without firing thrusters – has failed
  • last year reaction wheel #2 failed, and now #4 has failed
  • ...20 more annotations...
  • Kepler
  • needs at least three reaction wheels to be able to point precisely enough to hunt for planets orbiting distant stars
  • that doesn’t require such precise pointing abilities
  • Last year, NASA had approved an extended mission for Kepler through 2016
  • Initially, they did see some movement on the wheel
  • but it quickly went back
  • have a few things to try
  • get wheel #4 working again
  • they are currently using thrusters to stabilize the spacecraft, and in its current mode, the onboard fuel will last for several months
  • a “Point Rest State,”
  • would extend the fuel to last a period of several years
  • where we can park the vehicle
  • Point Rest State is a loosely-pointed, thruster-controlled state that minimizes fuels usage while providing a continuous X-band communication downlink
  • software to execute that state was loaded to the spacecraft last week
  • the team completed the upload of the parameters the software will use
  • there is the possibility of the wheel running in the opposite direction, but running the wheel backward would mean they would need to use more thruster fuel
  • reaction wheels try to balance the forces from the solar pressure, that’s what forces a wheel to run
  • Earlier this year, elevated friction was detected in reaction wheel #4
  • even if the Kepler spacecraft is unable to make more observations, there are still terabytes of data to pore over
  • have two years of data that has yet to be searched through
Mars Base

Malfunction Could Mark the End of NASA's Kepler Mission - ScienceInsider - 0 views

news.sciencemag.org/...tion-could-mark-the-end-o.html

scibyte94 Kepler

shared by Mars Base on 16 May 13 - No Cached
  • Launched in 2009, the Kepler mission completed its 3.5-year planned run last year
  • monitors some 150,000 sunlike stars in search of transiting planets
Mars Base

Billion-year-old water could hold clues to life on Earth and Mars - 0 views

phys.org/...old-clues-life-earth-mars.html

scibyte94 AncientWater

shared by Mars Base on 16 May 13 - No Cached
  • A UK-Canadian team of scientists has discovered ancient pockets of water, which have been isolated deep underground for billions of years and contain abundant chemicals known to support life
  • This water could be some of the oldest on the planet and may even contain life
  • the similarity between the rocks that trapped it and those on Mars raises the hope that comparable life-sustaining water could lie buried beneath the red planet's surface
  • ...13 more annotations...
  • Researchers
  • analysed water pouring out of boreholes from a mine 2.4 kilometres beneath Ontario, Canada
  • found that the water is rich in dissolved gases like hydrogen, methane and different forms – called isotopes – of noble gases such as helium, neon, argon and xenon
  • there is as much hydrogen in the water as around hydrothermal vents in the deep ocean, many of which teem with microscopic life
  • The hydrogen and methane come from the interaction between the rock and water, as well as natural radioactive elements in the rock reacting with the water
  • These gases could provide energy for microbes that may not have been exposed to the sun for billions of years.
  • The crystalline rocks surrounding the water are thought to be around 2.7 billion years old. But no-one thought the water could be the same age, until now
  • Using ground-breaking techniques
  • researchers show that the fluid is at least 1.5 billion years old, but could be significantly older.
  • interconnected fluid system in the deep Canadian crystalline basement that is billions of years old, and capable of supporting life
  • Before this finding, the only water of this age was found trapped in tiny bubbles in rock and is incapable of supporting life
  • the water found in the Canadian mine pours from the rock at a rate of nearly two litres per minute
  • don't yet know if the underground system in Canada sustains life
Mars Base

Researchers identify target to prevent hardening of arteries - 0 views

medicalxpress.com/...013-05-hardening-arteries.html

scibyte94 atherosclerosis

shared by Mars Base on 17 May 13 - No Cached
  • Mars Base on 17 May 13
     
    atherosclerosis
Mars Base

Nine-Year-Old Mars Rover Passes 40-Year-Old Record - NASA Jet Propulsion Laboratory - 0 views

www.jpl.nasa.gov/...news.php

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  • Apollo 17 astronauts
  • for three days in December 1972
  • drove their mission's Lunar Roving Vehicle 19.3 nautical miles (22.210 statute miles or 35.744 kilometers
Mars Base

Mars Rover Breaks U.S. Record for Off-Planet Driving: Scientific American - 0 views

www.scientificamerican.com/article.cfm

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  •  Opportunity rover drove 263 feet (80 meters) on
  • (May 15), bringing its total odometry on the Red Planet to 22.220 miles (35.760 kilometers
  • Opportunity still trails another robot for the international distance record
  • ...7 more annotations...
  • The Soviet Union's remote-controlled Lunokhod 2 rover traveled 23 miles (37 km) on the moon in 1973.
  • golf-cart-size Opportunity
  • landed on Mars in January 2004 on three-month missions to search for signs of past water activity on the Red Planet
  • Spirit stopped communicating with Earth in 2010 and was declared dead a year later
  • Opportunity had been working at a section of the rim dubbed "Cape York" since the middle of 2011
  • this week it began trekking toward an area called Solander Point, which lies 1.4 miles (2.2 km) away
  • Opportunity's handlers have said they'd like to add this milestone to the rover's resume, though science remains the mission's top priority
Mars Base

mars-rover-breaks-us-record-off-planet-driving_2.jpg (JPEG Image, 600 × 1012 ... - 0 views

www.scientificamerican.com/...ecord-off-planet-driving_2.jpg

scibyte94 opportunity

shared by Mars Base on 18 May 13 - No Cached
  • Mars Base on 18 May 13
     
    Comparisons among the distances driven by various wheeled vehicles on the surface of Earth's moon and Mars | Image: NASA/JPL-Caltech
Mars Base

More Insight on How NASA Might Revive the Kepler Space Telescope - 0 views

www.universetoday.com/...ive-the-kepler-space-telescope

scibyte94 Kepler

shared by Mars Base on 19 May 13 - No Cached
  • there’s still a year and a half’s worth of data in the pipeline that scientists will analyze to identify other candidate planets, and there will continue to be Kepler science discoveries for quite some time
  • There are two possible ways to salvage the spacecraft
  • they could try turning back on the reaction wheel that they shut off a year ago. It was putting metal on metal, and the friction was interfering with its operation
  • ...4 more annotations...
  • could see if the lubricant that is in there, having sat quietly, has redistributed itself, and maybe it will work
  • The other scheme,
  • this has never been tried, involves using thrusters and the solar pressure exerted on the solar panels to try and act as a third reaction wheel and provide additional pointing stability
  • Kepler carries a photometer, not a camera, that looks at the brightness of stars, and so its optics deliberately defocus light from stars to create a nice spread of light on the detector, which is not ideal for spotting asteroids
Mars Base

158255285 - 0 views

www.universetoday.com/...158255285

scibyte93 opportunity

shared by Mars Base on 19 May 13 - No Cached
  • Mars Base on 19 May 13
     
    Soviet Lunokhod-2 lunar rover. Credit: Ria Novosti
Mars Base

Emergency Spacewalk Likely for 'Serious' ISS Coolant Leak - 0 views

www.universetoday.com/...y-for-serious-iss-coolant-leak

scibyte94 iss ViewerFeedback

shared by Mars Base on 19 May 13 - No Cached
  • while the coolant is vital to the operation of the ISS for the electricity-supplying systems, the crew is not in any danger
  • The ammonia cools the 2B power channel, one of eight power channels that control the all the various power-using systems at the ISS
  • All the systems that use power from the 2B channel, the problem area, are being transferred throughout the day to another channel
  • ...2 more annotations...
  • The 2B channel will eventually shut down when the coolant is depleted, and the power is being diverted in order to keep everything up and running on the station
  • While Cassidy and Marshburn prepare in space, Astronauts at NASA’s Johnson Space Center are using the Neutral Buoyancy lab – a 12- meter (40 ft.) deep swimming pool with mockups of the space station that simulates the zero-gravity conditions in space – going through the entire expected EVA
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