Monday, February 8, 2010

The black box cockpit voice recorder from an Ethiopian Airlines flight that crashed into the Mediterranean several weeks ago, killing all on board, has been found by search crews. The flight data recorder had been recovered earlier in the day. The bodies of eight victims were recovered from what is believed to be fuselage.

“We found it and retrieved it about an hour ago today,” Lebanese army Brigadier Saleh Haj Suleiman said, as quoted by BusinessWeek. According to reports, the plane made a sharp turn and disappeared from the radar upon departure; Lebanese officials, however, say it’s too early to conclude the crash was due to pilot error.

The black box records communication data, technical information such as speed, altitude, etc., as well as conversation in the airplane cockpit, which could help investigators determine why the jet crashed.

The boxes will be transported to France to be analysed, according to officials.

Flight ET409, which had departed from Beirut, Lebanon, was bound for Addis Ababa in Ethiopia on January 25 when it crashed into the waters of the Mediterranean Sea several minutes after takeoff, in inclement weather. All ninety people aboard were killed.

Minister of Public Works and Transport Ghazi Aridi told Reuters, “The priority now is searching for the rest of the bodies of victims.” So far, the bodies of 23 victims have been recovered.

Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.

A compilation of brief news reports for Monday, May 7, 2007.

A 30 meter section of a gas pipeline in Luka (near Kiev) in Ukraine has been destroyed by an explosion. Although supplies to Europe via this pipeline have stopped, Ukrainian Energy Minister Georgi E. Boyko said that supplies to Europe would not be affected.

“There are no changes in volumes of gas being transported,” Yuri Korolchuk said. “Volumes due to pass through the damaged section are being redirected through the Soyuz pipeline.”

Normal flows are reported in the Czech Republic, Hungary, Poland and Romania.

Sources

• “Blast damages pipeline in Ukraine” — Russia Today, May 8, 2007
• Natalya Zinets, Reuters. “Blast hits Ukraine gas pipeline” — The Scotsman, May 7, 2007

Copper prices are rising. Between record copper imports from China, and a mining strike in Peru, the prices have climbed to over $8100 (United States dollars) a tonne, for a gain of $575 dollars over the last week. However the upward trend is not new, it has been climbing for quite some time. In April 2003, the price of copper was under $2000 a tonne.

The metal market has been tending up due to growth in the Chinese industrial production. This trickles down to the local level, where the buying price at scrap yards is ever climbing, making scrap metal collection a more profitable endeavour for individual people using pick up trucks or other such vehicles to collect and cash in the scrap metal at metal buying yards. It can be collected via agreements with businesses, from the garbage, or, sometimes, by theft.

Copper prices fell today on the NYMEX commodity exchange from US$3.7545 per pound to US$3.7125 based on the July futures contract.

Sources

• “Copper up but crude oil down” — Financial Express, May 6, 2007
• Millie Munshi. “Metals Bubble Poised to Burst on Increasing Supplies” — Bloomberg L.P., May 7, 2007
• “Commodity Futures” — Bloomberg L.P., accessed May 7, 2007

One man was killed and another injured by an exploding backpack in the parking lot of the Luxor Hotel in Las Vegas, Nevada. The explosion happened at 4 a.m. PDT when the victim tried to remove a the object left on top of his car.

Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) are on the scene. Aerial images did not show any apparent damage.

“We believe the victim was the intended target of this,” Bill Cassell said, spokesperson for the Las Vegas Metropolitan Police Department. “This is being treated as a homicide in which the weapon used to cause death is a non-traditional weapon.”

Both of the victims worked at the Luxor.

Sources

• Associated Press. “1 dead, 1 hurt in Las Vegas parking lot blast” — MSNBC, May 7, 2007
• “Explosion kills man in Vegas outside Luxor hotel” — Reuters, May 7, 2007

Sunday, February 19, 2006

The United States Secretary of Defense Donald Rumsfeld said that U.S. public diplomacy efforts need to do more in the media to communicate a message friendly to democracy.

“We’ll need to do all we can to attract supporters to our efforts and to correct the lies that are being told, which so damage our country, and which are repeated and repeated and repeated,” Rumsfeld said in an address to the Council on Foreign Relations in New York city on Friday. He said that insurgent groups have learned to use media and its new satellite and Internet technologies, and are working 24/7, to manipulate public opinion.

Rumsfeld called for the need to implement a “strategic communications framework” to present news information in Afghanistan and Iran. He warned, ” …the [news] vacuum will be filled by the enemy and by news informers that most assuredly will not paint an accurate picture of what is actually taking place.” He said there was a need for communications training of military public affairs officials. The Department of Defense would begin with an emphasis on using out-sourced media expertise found in the private-sector, as was done with the controversial use of Lincoln Group who placed pro-democracy stories in Iraqi media in a business arrangement with the U.S. military.

Rumsfeld was critical of the U.S. media for its sharp response to that program at his address in New York, which he said had the effect of stopping that military effort. In an appearance on the The Charlie Rose Show, a televised program taped earlier and then aired by PBS last Friday, the same day as his New York address, Rumsfeld said “When we heard about it, we said, ‘Gee, that’s not what we ought to be doing.’ … They stopped doing that.” But in a Los Angeles Times report, a Lincoln Group insider and a U.S. commander in Iraq, General George W. Casey, said the program was still in existence.

The White House has signaled a shift towards the use of media in the “War against Terror”. The U.S. Secretary of State Condoleezza Rice said in Senate testimony on Wednesday last week that $10 million is already appropriated to support political dissidents, labor union leaders and human rights activists in Iran. The Bush administration will be asking for an additional $75 million in funding for the 2006 fiscal year to expand the program.