Skip to main content

Home/ Groups/ SciByte
Rss Feed
Sort By: Most Recent | Popular Filter: All | Bookmarks | Topics Simple Middle
Mars Base

China Readying 1st Moon Rover for Launch This Year | Space.com - 0 views

www.space.com/na-moon-rover-launch-2013.html

scibyte99

shared by Mars Base on 20 Jun 13 - No Cached
  • China's robotic Chang'e 3 mission, reportedly slated to blast off toward the end of 2013
  • Chang'e 3 will become China's first craft to attempt a soft landing and rover deployment on the surface of the moon
  • the nation's manned spaceflight program continues to move forward. Three "taikonauts" arrived at China's Tiangong 1 space module on June 13, beginning a 12-day stint aboard the orbiting laboratory
  • ...9 more annotations...
  • The three crewmembers are slated to spend a total of 15 days in orbit, which would make their Shenzhou 10 mission the longest manned spaceflight in China's history.
  • According to a statement from the China National Space Administration, the nation carried out a 40-day ground test to mimic the lunar environment, in an attempt to make sure that Chang’e 3 can endure the extreme temperatures on the moon
  • Chang'e 3 lunar probe consists of two main parts: a service module and a lunar landing vehicle
  • Dragon in Space, a website that monitors China's space program
  • the mission will be launched this December
  • The probe would land softly on the moon’s surface and deploy a six-wheeled rover to explore the areas surrounding the landing spot
  • Ready to watch the Chinese moon landing and rover action from above is NASA's Lunar Reconnaissance Orbiter (LRO
  • Looking further into the future, China's step-by-step robotic moon effort also includes a return to Earth of lunar surface materials
  • head of the National Astronomical Observatories of the Chinese Academy of Sciences and chief scientist of the lunar exploration program, said some lunar materials would be scooped up from the moon’s surface, while other material would be acquired from a depth of about 6.6 feet (2 meters).
Mars Base

Concentrator solar cell with world's highest conversion efficiency of 44.4% - 0 views

phys.org/...-world-highest-conversion.html

scibyte98 scibyte99 SolarPower

shared by Mars Base on 16 Jun 13 - No Cached
  • Sharp Corporation has achieved the world's highest solar cell conversion efficiency of 44.4%, using a concentrator triple-junction compound solar cell
  • Measurement of the value—which sets a record for the world's highest concentrating conversion efficiency—was confirmed
  • Compound solar cells typically offer high conversion efficiency while utilizing photo-absorption layers made from compounds of multiple elements, such as indium and gallium
  • ...3 more annotations...
  • triple-junction compound solar cells use a proprietary technology that enables the efficient conversion of sunlight into electricity by means of a stack of three photo-absorption layers
  • o achieve a concentrating conversion efficiency of 44.4%, Sharp worked to widen the effective concentrator cell surface and ensure uniformity of width at the interface of the connecting concentrator cell and electrodes.
  • Because of their high conversion efficiency, compound solar cells have thus far been used primarily on space satellites
Mars Base

New drug reverses loss of brain connections in Alzheimer's disease - 0 views

medicalxpress.com/...rses-loss-brain-alzheimer.html

scibyte99 Alzheimer

shared by Mars Base on 18 Jun 13 - No Cached
  • The first experimental drug to boost brain synapses lost in Alzheimer's disease
  • combines two FDA-approved medicines to stop the destructive cascade of changes in the brain that destroys the connections between neurons, leading to memory loss and cognitive decline.
  • The decade-long study
  • ...21 more annotations...
  • shows that NitroMemantine can restore synapses, representing the connections between nerve cells (neurons) that have been lost during the progression of Alzheimer's in the brain
  • These findings actually mean that you might be able to intercede not only early but also a bit later
  • Alzheimer's patient may be able to have synaptic connections restored even with plaques and tangles already in his or her brain.
  • study, conducted in animal models as well as brain cells derived from human stem cells,
  • team mapped the pathway that leads to synaptic damage in Alzheimer
  • found that amyloid beta peptides, which were once thought to injure synapses directly
  • actually induce the release of excessive amounts of the neurotransmitter glutamate from brain cells called astrocytes that are located adjacent to the nerve cells.
  • Normal levels of glutamate promote memory and learning, but excessive levels are harmful
  • Alzheimer's disease, excessive glutamate activates extrasynaptic receptors, designated eNMDA receptors
  • which get hyperactivated and in turn lead to synaptic loss
  • lab had previously discovered how a drug called memantine can be targeted to eNMDA receptors to slow the hyperactivity seen in Alzheimer's.
  • memantine's effectiveness has been limited.
  • memantine—a positively charged molecule—is repelled by a similar charge inside diseased neurons
  • memantine gets repelled from its intended eNMDA receptor target on the neuronal surface.
  • FDA approval of memantine in 2003
  • a fragment of the molecule nitroglycerin—a second FDA-approved drug commonly used to treat episodes of chest pain or angina in people with coronary heart disease—could bind to another site that the Lipton group discovered on NMDA receptors.
  • memantine rather selectively binds to eNMDA receptors, it also functions to target nitroglycerin to the receptor
  • by combining the two, Lipton's lab created a new, dual-function drug
  • researchers developed 37 derivatives of the combined drug before they found one that worked
  • By shutting down hyperactive eNMDA receptors on diseased neurons, NitroMemantine restores synapses between those neurons
  • NitroMemantine brings the number of synapses all the way back to normal within a few months of treatment in mouse models of Alzheimer's disease. In fact, the new drug really starts to work within hours
Mars Base

Did a Piece of Mir Really Land in Massachusetts? - 0 views

www.universetoday.com/...r-really-land-in-massachusetts

scibyte99

shared by Mars Base on 20 Jun 13 - No Cached
  • What at first glance was a simple “Man finds space rock” story morphed into an extraordinary claim
  • Phil Green of Amesbury, Massachusetts.
  • was searching the local riverbed for arrowheads when he came across the
  • ...18 more annotations...
  • black pitted rock immediately struck him as something bizarre
  • didn’t register as metallic to his metal detector, but Mr. Green kept it in his backyard for about five years until it was noticed by a friend
  • Green told local reporters that the rock was sent off for analysis, only to be returned to him just a few weeks ago
  • The media quickly ran with the “Man finds a piece of Mir” story
  • The analysis
  • stated that the vitreous material “shows a composition similar to that used in ballast by the Soviet space program starting in the mid-1980s
  • There are
  • problems with
  • Mir reentered in 2001, six years before the 2007
  • Mir ended its career in the “so-called spacecraft cemetery of the southern Pacific Ocean
  • possibility of a reentry of a Progress resupply vehicle being a potential source, or perhaps an unrelated Russian space vehicle.
  • problem of the certification
  • Several articles state that the piece of debris coming from Mir was “confirmed by NASA.”
  • NASA Chief Scientist for Orbital Debris
  • that no such NASA validation exists
  • NASA Orbital Debris Program Office has not been presented with any claim regarding debris from the Mir space station
  • it is not possible for debris from the Mir reentry to have landed in the U.S.”
  • the find does look like something interesting. The pitting and the melted fusion crust are all reminiscent of reentry
Mars Base

Video Transcript: Curiosity's Cameras - NASA Jet Propulsion Laboratory - 0 views

www.jpl.nasa.gov/...video-transcript.php

scibyte98 Curiosity

shared by Mars Base on 18 Jun 13 - No Cached
  • received a lot of questions about the cameras on the rovers and we're here to answer some of those questions
  • The Curiosity rover actually has 17 cameras on it, which is the most of any NASA planetary mission ever.
  • took pictures as the rover was landing on Mars
  • ...13 more annotations...
  • MARDI, or the Mars Descent Imager,
  • is the camera mounted on the end of the arm, and that takes close-up, high-resolution color photos
  • MAHLI
  • hazard avoidance cameras, or the HazCams. There are four of these in the front and four in the back, and they're used to take pictures of the terrain near the wheels and nearby the rover
  • Mast Cameras, which are color imagers, which are used to do geology investigations
  • Navigation Cameras, which take pictures that are used to drive the rover
  • the remote microscopic imager, which is part of the ChemCam laser instrument. And that's used to document the laser spots, that the rover makes on the surface
  • Many of the black and white images that come back from the rover are
  • black and white, or gray scale as we call it, is because that's all the rover really needs in order to detect rocks and other obstacles
  • Other cameras are color, such as the Mastcam imager, and the reason that they're color is because the scientists use the color information to learn about the soil and the rocks
  • There are 1-megapixel black and white imagers for the engineering cameras and 2-megapixel color imagers for the science cameras
  • In addition to the video that we took when the rover descending on to the surface, we've taken movies of the soil being shaken in the scoop.
  • files are pretty large and because we have a limited downlink each day, the scientists prefer to take still images of new targets
Mars Base

LEGO to Roll Out Mars Rover Curiosity as Toy Model | Space.com - 0 views

www.space.com/over-curiosity-lego-model.html

scibyte98 lego Curiosity

shared by Mars Base on 18 Jun 13 - No Cached
  • The Denmark-based LEGO Group chose a fan-built model of the car-size rover to be the next release in its CUUSOO line of building brick toys.
  • Pakbaz designed the model to feature many of the details of the real Mars rover, including its "rocker-bogie" wheel suspension that enables Curiosity to navigate the Martian surface
  • He separately built a model of the rover's "sky crane" descent stage, which lowered Curiosity down into the crater, although whether that component will make it into the final product is not yet known
  • ...2 more annotations...
  • The Mars Science Laboratory (MSL) Curiosity rover will be the fifth model in the LEGO CUUSOO line and the second to feature a space theme
  • In March 2012, LEGO released a model of Japan's Hayabusa asteroid-sampling probe as designed and suggested by LEGO fan Daisuke Okubo
Mars Base

Results of the Fall 2012 LEGO® Review - The Official LEGO® CUUSOO Blog - 0 views

blog.lego.cuusoo.com/...results-fall-2012-lego-review

scibyte98 lego Curiosity

shared by Mars Base on 18 Jun 13 - No Cached
  • The final product is still in development. Exact pricing and availability is still being determined
Mars Base

NASA - 2013 Astronaut Class - 0 views

www.nasa.gov/...2013astroclass.html

scibyte98 astronaut

shared by Mars Base on 17 Jun 13 - No Cached
  • The 2013 astronaut candidate class comes from the second largest number of applications NASA ever has received -- more than 6,100
  • Josh A. Cassada, Ph. D
  • a former naval aviator
  • ...22 more annotations...
  • is a physicist by training and currently is serving as co-founder and Chief Technology Officer for Quantum Opus
  • Victor J. Glover
  • is an F/A-18 pilot and graduate of the U.S. Air Force Test Pilot School
  • currently is serving as a Navy Legislative Fellow in the U.S. Congress
  • Tyler N. Hague
  • currently is supporting the Department of Defense as Deputy Chief of the Joint Improvised Explosive Device Defeat Organization
  • Christina M. Hammock
  • currently is serving as National Oceanic and Atmospheric Administration (NOAA) Station Chief in American Samoa
  • Nicole Aunapu Mann
  • Lt. Colonel, U.S. Air Force
  • Lt. Commander, U.S. Navy
  • Major, U.S. Marine Corps
  • is an F/A 18 pilot, currently serving as an Integrated Product Team Lead at the U.S. Naval Air Station, Patuxent River
  • Anne C. McClain
  • Major, U.S. Army
  • is an OH-58 helicopter pilot, and a recent graduate of U.S. Naval Test Pilot School at Naval Air Station, Patuxent River
  • currently is an Assistant Professor of Anesthesia at Harvard Medical School, Massachusetts General Hospital, Boston
  • Andrew R. Morgan, M.D
  • Jessica U. Meir, Ph.D.
  • Major, U.S. Army
  • has experience as an emergency physician and flight surgeon for the Army special operations community, and currently is completing a sports medicine fellowship
  • The new astronaut candidates will begin training at NASA's Johnson Space Center in Houston in August
Mars Base

Distantly Orbiting Alien World May Challenge Planet-Formation Theories | Space.com - 0 views

www.space.com/tantly-orbiting-exoplanet.html

scibyte98 exoplanet

shared by Mars Base on 14 Jun 13 - No Cached
  • red dwarf star TW Hydrae, which lies about 176 light-years from Earth in the constellation Hydra
  • if there is a planet and there is no dust larger than a grain of sand farther out, that would be a huge challenge to traditional planet formation models
« First ‹ Previous 641 - 660 of 2611 Next › Last »
Showing 20▼ items per page