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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

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

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

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

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

Gray hair and vitiligo reversed at the root - 0 views

medicalxpress.com/...ir-vitiligo-reversed-root.html

scibyte93 GreyHair

shared by Mars Base on 08 May 13 - No Cached
  • In a new research report
  • people who are going gray develop massive oxidative stress via accumulation of hydrogen peroxide in the hair follicle, which causes our hair to bleach itself from the inside out
  • the report shows that this massive accumulation of hydrogen peroxide can be remedied with a proprietary treatment
  • ...7 more annotations...
  • described as a topical, UVB-activated compound called PC-KUS (a modified pseudocatalase).
  • the study also shows that the same treatment works for the skin condition, vitiligo
  • To achieve this breakthrough, Schallreuter and colleagues analyzed an international group of 2,411 patients with
  • vitiligo
  • They found that for the first time, patients who have
  • a certain nerval distribution involving skin and eyelashes show the same oxidative stress as observed in the much more frequent general
  • associated with decreased antioxidant capacities including catalase, thioredoxin reductase, and the repair mechanisms methionine sulfoxide reductases
Mars Base

Printable 'bionic' ear melds electronics and biology - 0 views

phys.org/...nic-ear-melds-electronics.html

scibyte92 scibyte93 BionicEar

shared by Mars Base on 02 May 13 - No Cached
  • Scientists at Princeton University used off-the-shelf printing tools to create a functional ear that can "hear" radio frequencies far beyond the range of normal human capability
  • primary purpose was to explore an efficient and versatile means to merge electronics with tissue
  • used 3D printing of cells and nanoparticles followed by cell culture to combine a small coil antenna with cartilage, creating what they term a bionic ear.
  • ...17 more annotations...
  • Previously, researchers have suggested some strategies
  • That typically happens between a 2D sheet of electronics and a surface of the tissue
  • our work suggests a new approach—to build and grow the biology up with the electronics synergistically and in a 3D interwoven format
  • Last year, a research effort
  • resulted in the development of a "tattoo" made up of a biological sensor and antenna that can be affixed to the surface of a tooth
  • This project, however, is the team's first effort to create a fully functional organ: one that not only replicates a human ability, but extends it using embedded electronics
  • Creating organs using 3D printers is a recent advance; several groups have reported using the technology for this purpose in the past few months
  • this is the first time that researchers have demonstrated that 3D printing is a convenient strategy to interweave tissue with electronics
  • Ear reconstruction "remains one of the most difficult problems in the field of plastic and reconstructive surgery
  • the team turned to a manufacturing approach called 3D printing
  • The finished ear consists of a coiled antenna inside a cartilage structure
  • Two wires lead from the base of the ear and wind around a helical "cochlea" – the part of the ear that senses sound – which can connect to electrodes
  • further work and extensive testing would need to be done before the technology could be used on a patient
  • the ear in principle could be used to restore or enhance human hearing.
  • electrical signals produced by the ear could be connected to a patient's nerve endings, similar to a hearing aid
  • The current system receives radio waves, but he said the research team plans to incorporate other materials, such as pressure-sensitive electronic sensors, to enable the ear to register acoustic sounds
  • researchers used an ordinary 3D printer to combine a matrix of hydrogel and calf cells with silver nanoparticles that form an antenna. The calf cells later develop into cartilage
Mars Base

Mars Science Laboratory: NASA Curiosity Rover Team Selects Second Drilling Target On Mars - 0 views

mars.jpl.nasa.gov/...index.cfm

scibyte94 Curiosity

shared by Mars Base on 10 May 13 - No Cached
  • The team operating NASA's Curiosity Mars rover has selected a second target rock for drilling and sampling. The rover will set course to the drilling location in coming days.
  • "Cumberland," lies about nine feet (2.75 meters) west of the rock where Curiosity's drill first touched Martian stone in February
  • Both rocks are flat, with pale veins and a bumpy surface. They are embedded in a layer of rock on the floor of a shallow depression called "Yellowknife Bay.
  • ...6 more annotations...
  • This second drilling is intended to confirm results from the first drilling, which indicated the chemistry of the first powdered sample from John Klein was much less oxidizing than that of a soil sample the rover scooped up before it began drilling.
  • Cumberland and John Klein are very similar, Cumberland appears to have more of the erosion-resistant granules that cause the surface bumps
  • concretions, or clumps of minerals, which formed when water soaked the rock long ago
  • Mission engineers
  • recently finished upgrading Curiosity's operating software following a four-week break
  • rover continued monitoring the Martian atmosphere during the break, but the team did not send any new commands
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