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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.

Sunday, December 10, 2006

Harry Doynhoven, minister for transport safety, has called for a ban on using mobile phones (cellphones) while driving in New Zealand. The ban comes just days after a teenager was killed after allegedly driving while texting on their mobile phone.

Mr Duynhoven said that it is time to ban hand-held mobile phones in cars. “I would love to ban it. If I were a benign dictator, it would be gone by lunchtime.” Mr Duynhoven believes that a campaign to educate the public is needed to combat the number of people who die while using their mobile phones while driving. One of the new ways to combat this is suspected to be new road safety measure. The new initiatives will be announced on Wednesday.

“I hope that sufficient parliamentarians who read the reports of another young person who obviously wasn’t concentrating on her driving will say it’s about time something was done,” Mr Duynhoven said, “However such a ban would be very difficult to police.”

A report, prepared by the Ministry of Transport, will be shown to the government on the dangers of using a mobile phone while driving. Peter Burke, spokesman for the Ministry of Transport, said: “There’s no law against using a cellphone at the moment. There’s the whole issue of driver distraction of which cellphone use is a part. But there’s been no decision on it yet. Anyone who texts while you’re driving is pushing the limits. I don’t think anyone would condone texting while driving, it’s a recipe for disaster.”

Every year around four fatal crashes occur because the drivers are using their mobile phones while driving. Around 50 non fatal crashes occur each year for the same reason. However the police expect that the actual number is higher.

“A lot of drivers are unfortunately their own worst enemy – they’re busy talking and texting on the phone and fail to pay attention to what’s going on around them. The results can be, and often are, crashes which cause injury and death,” Rob Lee, spokesman for the police, said.

Sharleen Lloyd, 16-years-old, was killed when she drove her car into a parked trailer after it left the road because she was allegedly texting (SMS) on her mobile phone. Her passenger and boyfriend, Matthew Smit, had non fatal injuries. Andrew Hicks died when he crashed into a powerpole as a result from using his cellphone while driving.

Many countries already have a ban in place of using a mobile phone while driving, including the United Kingdom and the United States of America. Mr Duynhoven said: “But in countries where they have bans, they still have people using cellphones while driving. The issue is changing behaviour.”

However New Zealand does currently have a law which enables police to prosecute someone who doesn’t give attention or care to driving.

Sunday, March 26, 2006

Buffalo, New York —For the second weekend in a row, demonstrators protested the Elmwood Village Hotel proposal on the proposed site.

The Elmwood Village Hotel is a proposed hotel by Savarino Construction Services Corporation and is designed by architect Karl Frizlen of the Frizlen Group. It is to be placed on the corner of Elmwood and Forest Avenues in Buffalo and will require the demolition of at least five properties (1109-1121 Elmwood).

The proposal also required that all five properties, including 605 Forest, be rezoned to a “C-2” zone, or a “special development plan.” The rezoning was passed by Buffalo’s Common Council on March 21, 2006.

Russell Smith, owner of the Six Nation’s Gift Shop at 1121 Elmwood, also participated in the protest.

“I am a Native American and we opened a Native American gift shop and we are just brand new [and just] opened. Having started out a business for the first time, and it the only Native American shop in the city, and I do not see the use of any hotel, especially at this district. The Elmwood Strip is pretty well established. Some of these people have been here a long while you know and they’re [Savarino Construction] disrupting their livelihood,” said Smith to Wikinews.

When Smith was asked if he was going to be in any of the shops in the new hotel he replied, “we don’t have the option of getting into the hotel or any of the shops that are going to be there. We haven’t [had] any idea that they [Savarino] were even planning to tear these buildings down to put a hotel here until we had moved in. I think thats a little unfair.”

Former City of Buffalo Mayor Anthony Masiello was asked to sign the petition to stop the hotel when he walked by, but he declined saying, “I respect what you are doing, but I am for the hotel.”

Despite the cold weather, at least 45 people showed up to walk the picket line.

For the moment, no further protests have been scheduled, pending the final decision on the hotel proposal by the city’s Planning Board which meets Tuesday, March 28, 2006. The meeting begins at 8:00am and will be held in room 902 on the 9th floor of City Hall in downtown Buffalo.

On Saturday morning several individuals attended a meeting with a lawyer to see what could be done, if anything, about the proposal and about Hans Mobius, former Buffalo mayoral candidate and owner of the properties to be demolished at 1109-1121 Elmwood.

One of the attendees, Nancy Pollina, co-owner of Don Apparel with Patty Morris, stated that “there is a case” but that she is likely unable to afford the large attorney’s fees. Pollina reports that she is looking into a “legal fund.”

Some of the affected are considering going to the New York State Supreme Court pro se to seek an injunction.

Some tenants of Mobius’s buildings have accused him of being a “slumlord” and claim that he “intentionally neglected” his properties with the intention of selling. Mobius, who has owned the properties for about 20 years, tried in 1995 to sell them to a developer who wanted to build a Walgreens Drugstore on the same site as the proposed hotel.

Mobius is expected to appear in housing Court on April 11, 2006. He has not returned any phone calls from Wikinews.

Thursday, May 27, 2010

A US Coast Guard official said today that BP’s latest effort to plug the Gulf of Mexico oil spill has been successful in slowing the amount of oil leaking from the well.

The official, Admiral Thad Allen, said that the procedure, known as a “top kill” operation, has been able to block some of the leaking oil at the source, the top of the damaged well. The operation involves pumping material into the well to plug the leak before cement is used to permanently seal the leak. Allen said the operation has “been able to force mud down and not allow any hydrocarbons to come up.”

BP hasn’t confirmed the success of the top kill operation, saying only that the “operation is proceeding as we planned it,” and that there had been no major incidents thus far. Although the possibility of failure is still present, experts say that the longer the procedure continues, the less likely it will be that anything goes wrong.

The procedure began yesterday afternoon, after diagnostics on the damaged equipment on the ocean’s surface indicated that it could withstand the added pressure of the mud being pumped into the well. Although engineers involved with the operation wore concerned that the pressure of the mud might not be able to overcome that of the oil, that has thus far not been the case.

Separately, a group of US scientists announced new estimates of how much oil was flowing from the well, ranging from 12,000 to 25,000 barrels a day, far higher than BP’s original estimate of 5,000 barrels a day, a figure which BP warned was possibly inaccurate.

In a press conference Thursday afternoon, US president Barack Obama also announced new measures in response to the spill, which include:

• Suspending off-shore test drilling for six months
• Extending the moratorium on issuing drilling permits for an additional six months
• Cancelling the sale of leases for off-shore drilling.

In statements, Obama criticized the “scandalously close relationship” between government officials and oil companies in the past, saying that the Mineral Management Service, which is the agency responsible for monitoring off-shore drilling, had been corrupt for years.

Saturday, May 6, 2006

Early Saturday morning winds up to 90 miles per hour struck Waco, Texas and central McLennan County, United States, causing widespread damage and leaving many households without electricity.

No deaths or serious injuries have been reported; however, there is a tremendous amount of damage in 15 areas of the city, leading Mayor Virgina DuPuy to declare the city a disaster area.

The hardest hit area was Franklin Avenue, where the Coca-Cola bottling plant’s roof was peeled open as if by a giant can-opener. There were Sprite bottles spread out onto the street. The nearby Furniture Row shopping center was also hit hard. Some furniture was found as far as three-quarters of a mile away. Other hard-hit areas were Robinson, Hewitt, Woodway, and Speegleville. Densely populated Inner Waco was spared of any catastrophic damage, though hundreds, and possibly thousands, of trees have fallen, and roofs destroyed.

The main concern is restoring power to over 23,000 households and businesses. Many gas stations and grocery stores in the disaster areas were closed until power is restored. Those that remained open have had to throw out all perishable items. Also of concern is getting electricity to those with medical needs. The city has provided help to those without power at the Dewey Recreation Center.

The storm is the hardest to hit the area since the tornado that struck on May 11, 1953, which tore through downtown and killed 114 people.

Waco has seen more than its share of tornadoes recently. Only a week ago, an F1 tornado damaged many houses along Orchid and Kendall Lanes. No people were injured, though two horses were killed when their stable collapsed.

The National Weather Service confirmed this morning’s winds were a F2 tornado, where wind speeds may have reached 115 miles per hour in some locations.

Sunday, November 6, 2005

Authorities are looking for USD$75,000 in frozen bull semen stolen Sunday from liquid nitrogen tanks at a farm in Frederick County, Maryland. Eric Fleming, the owner, says the semen took 4 to 5 years to collect from 40 to 50 bulls. He had planned to sell the semen at an upcoming Denver cattle show.

The collection and storage of semen can be a very profitable business—the ease of transportation reduces the costs normally associated with insemination, namely the transport of bull and cow to one another. Collection can be tricky, however, as bulls do not always produce as expected and the process is not particularly easy.

“I will give a nice fat reward for any information on semen that was stolen from my tank today,” Fleming posted to a livestock breeder’s message board. “It was a mother load of semen.”

Wednesday, January 26, 2011

Car manufacturer Toyota is to recall almost 1.7 million cars in two simultaneous recalls, that include the Toyota Avensis and Lexus IS 250, after concerns over fuel systems, which, if combined, amount to the biggest Toyota recall for six years.

Japan’s transport ministry stated it was possible for slight cracks to appear in fuel pipes in Avensis models, which may widen if the cars continue to be used. In the United Kingdom, Toyota GB are offering free repairs, which are expected to take around four and a half hours each. The Lexus IS 250 is involved in a separate recall, with around 280 thousand models outside of Japan being recalled over a faulty fuel pressure sensor, which can possibly come loose, causing a fuel leak.

The Managing Director of Toyota GB stated “We are committed to putting the customer first and have a total focus on the quality of all our products. We will liaise with our customers to carry out the repair procedures as efficiently as possible, with minimal disruption”.

Toyota has recalled over 16 million cars globally since late 2009.