Author: Admin

Saturday, September 10, 2011

A 182-page report issued September 1 by the United States National Research Council warns that the amount of debris in space is reaching “a tipping point”, and could cause damage to satellites or spacecraft. The report calls for regulations to reduce the amount of debris, and suggests that scientists increase research into methods to remove some of the debris from orbit, though it makes no recommendations about how to do so.

NASA sponsored the study.

A statement released along with the report warns that, according to some computer models, the debris “has reached a tipping point, with enough currently in orbit to continually collide and create even more debris, raising the risk of spacecraft failures”. According to the Satellite Industry Association, there are now about 1,000 working satellites in Earth orbit, and industry revenues last year were US$168 billion (£104.33 billion,€119.01 billion).

The debris consists of various objects, such as decommissioned satellites and exhausted boosters, but the vast majority of the particles are less than one centimetre across. 16,094 pieces of debris were being tracked as of July, although estimates put the current number at over 22,000. The total number of fragments is thought to be as high as tens of millions. While most of the debris is very small, some of it is travelling at speeds as high as 17,500 mi h^-1 (28,164 km h^-1; 7,823.3 m s^-1).

The International Space Station sometimes has to dodge larger fragments, and in June its crew was forced to prepare to evacuate due to a close encounter with debris.

The UK Space Agency told Wikinews that space flight “is likely to be made more difficult” by the debris. However, communications will “[n]ot directly” be affected, “but if the GEO ring became unusable, there is no other altitude at which objects appear [‘]geo-stationary[‘] and so all antennas on the ground would then have to move in order to track the motion of the satellites”.

Donald J. Kessler, the lead researcher and former head of NASA’s Orbital Debris Program Office, said that “[t]he current space environment is growing increasingly hazardous to spacecraft and astronauts,” and suggested that “NASA needs to determine the best path forward for tackling the multifaceted problems caused by meteoroids and orbital debris that put human and robotic space operations at risk.”

Two events are thought to be the largest individual sources of space debris. Kessler said that “[t]hose two single events doubled the amount of fragments in Earth orbit and completely wiped out what we had done in the last 25 years”.

The first of these was a controversial 2007 Chinese anti-satellite weapon test, which smashed the decommissioned weather satellite Fengyun-1C into approximately 150,000 fragments over a centimetre in size—making up roughly twenty percent of all tracked objects—537 miles above the Earth’s surface.

The Chinese government has so far failed to respond to Wikinews’s queries regarding the incident.

The other is a 2009 collision between twelve-year-old active satellite Iridium 33 and the defunct Russian Strela-2M satellite Kosmos-2251—both weighing in excess of 1,000 lbs (454 kg)—that occurred 490 miles over Siberia, the first such collision. The Iridium satellite was replaced within 22 days, according to Iridium Communications, who operated it.

In a statement released to Wikinews, Iridium Communications said that they “received no warning of the impending collision. Although commercial projections of close encounters (commonly called conjunctions) were available, the accuracy of those projections was not sufficient to allow collision avoidance action to be taken.” They also made the assurance that the Air Force Space Command and United States Strategic Command now provide them with information through the Joint Space Operations Center, and that “when necessary, [they] maneuver [their] satellites based on this information to avoid potential collisions. [They] believe this is a substantial first step in better information sharing between the government and industry and support even more robust interaction which can provide better and more efficient constellation operation.”

Iridium expressed their support for “[l]ong-term investment to improve Space Situational Awareness” and “[i]mproved information sharing between industry and the U.S. government”, as well as more “[g]overnment support for policy and processes which would permit sharing of high-accuracy data as required to allow reliable assessment and warning” and “[i]ncreased cooperation between the government and U.S. and foreign commercial operators.”

They maintained that “the Iridium constellation is uniquely designed to withstand such an event. Because of the resilient and distributed nature of the Iridium constellation, the effects of the loss of a single satellite were relatively minor”, and that “any other system, commercial or military, which experienced the loss of a satellite, would have suffered significant operational degradation for a period of months if not years.” Nonetheless, the company is “concerned over the increasing level of risk to operations resulting from the debris in space.”

The report makes more than thirty findings, and more than twenty recommendations to NASA. None of the recommendations regard how to clean up the debris. However, it does cite a report by the Defense Advanced Research Projects Agency (DARPA), which suggested various possible techniques for catching and removing space debris, such as magnetic nets.

However, international law does not allow one country to collect another’s debris. George J. Gleghorn, vice chair of the committee, observed that “[t]he Cold War is over, but the acute sensitivity regarding satellite technology remains”.

The debris will, in time, be pulled into the earth’s atmosphere—where it will burn up—by gravity, but more debris is being created faster than this can happen.

The report recommends collaborating with the United States Department of State on “economic, technological, political, and legal considerations.” As already mentioned, international law does not allow one country to collect another’s debris.

According to the report, “[t]he problem of space debris is similar to a host of other environmental problems and public concerns characterized by possibly significant differences between the short- and long-run damage accruing to society … Each has small short-run effects but, if left unaddressed, will have much larger impacts on society in the future.”

A spokesperson for the UK Space Agency told Wikinews that the organisation “does not have any plans to get directly involved with [the clean-up] initiative but through its involvement with NASA in the Inter-Agency Space Debris Coordination Committee, it is conducting studies to identify which objects present the biggest hazard and how many objects may need to be removed and from where.” It says that the viability of such an operation is “a question of treating the symptom or the cause of the problem. Building more physical protection is costly and if the environment deteriorates too far, becomes unviable. It is best to treat the root cause, the presence of debris in orbit, and remove the large objects before they can break up into many thousands of uncontrolled fragments capable of destroying a satellite on impact.”

The spokesperson also pointed out that “[u]nder current licensing regimes (such as in the UK), countries are now obliging operators to remove satellites from crowded regions of space at the end of operational life”.

Monday, January 11, 2010

United Airlines Flight 634 made an emergency landing yesterday morning when only two of the three landing wheels on the Airbus A319 deployed as the plane was making its final approach into Newark, New Jersey’s Newark Liberty International Airport. After multiple attempts to fix the problem failed, the pilot decided that an emergency landing was the only remaining choice.

Only the plane’s nose gear and left landing gear had descended. The right landing gear would not release. The airliner made a go-around as the crew attempted to fix the problem. Passenger Jim Falk knew something was wrong saying, “Normally a big plane like that doesn’t do a bypass, so we knew something was wrong.”

However, the pilot decided that nothing could be done to bring the gear down, and an emergency landing was declared. “We are going to have an unusual landing,” the pilot calmly announced to the 53 passengers seated on the plane, according to passenger Moritz Loew. Another passenger, Paul Lasiuk said he was more shocked than scared, telling himself, “You have no choice. You’re going to go through this.”

“Brace! Brace! Brace!”, the pilot announced over the plane’s public address system, calling for passengers to enter the brace position as the plane made a touchdown on the runway at Newark. The plane touched down on the nose wheel and left rear wheel before lurching to the right causing sparks to fly as the right engine skidded along the runway. Eventually, the plane came to stop at 9:27 A.M. EDT.

Afterward, passengers and crew evacuated the plane by sliding down the evacuation slides and moving quickly away from the plane. They were then taken by bus to the airline’s lounge where they told their stories to investigators and waited for their luggage. Three passengers reported minor injuries but refused treatment.

The emergency landing caused the airport to shut down for 20 minutes, but service quickly resumed on two of the airports three runways. The plane remained on the runway throughout the afternoon as investigators determined the cause of the landing gear failure.

This is in contrast to last week, when the airport was shutdown for six hours after a young man named Haisong Jiang breached security by passing through an exit to kiss his girlfriend goodbye.

According to passengers, the crew remained calm during the ordeal. Jim Falk said, “They did a great job. There was no yelling, screaming, panicking or anything.” Falk said he wanted to buy a bottle of champagne for the currently unnamed pilot. Falk added, “The pilot did a beautiful job. He didn’t put it in the water like the other pilot did, but he should be commended.”

Martin Trebino, a spokesperson for United Airlines said they would not release the pilot’s name on Sunday, but did not indicate when his name would be made available either.

Paul Lasiuk said, “I’ve had a lot of worse landings at Newark before. It was unbelievably smooth.”

Moritz Loew joked with himself afterward saying, “What’s a great landing? One that you walk away from.”

The flight, which left Chicago’s O’Hare International Airport early Sunday morning around 6 A.M. reported no other problems during the flight up until the incident. According to United Airlines spokesperson Robin Urbanski, it remains unclear why the landing gear failed to deploy. Urbanski added that passengers’ tickets would be refunded and that they would receive vouchers and credit towards any future flight.

Wednesday, April 9, 2008

Youths in the Norfolk town of Caister-on-Sea, near Great Yarmouth, England, have been banned from purchasing “squirty bottles” of ketchup, and eggs after a number of complaints from residents in the area. The move, which is backed by the Norfolk Police, is aimed at reducing the number of anti-social incidents occurring in the area. Sergeant Andy Brown, of the Norfolk Police, has said that no further complaints have been received since the ban came into force.

While squirting ketchup itself is not a criminal offence, the damage that it can cause, such as removing paint from cars or houses, is often enough to bring charges of criminal damage. Sgt Brown said that there were “about a dozen complaints from residents, some of them elderly, about people squirting ketchup over doors, windows and vehicles.” Martin Bailie, a spokesperson for Lidl supermarkets, has defended his staff’s actions, saying “the stores’ staff were [already] challenging youngsters who were trying to bulk buy these things. It wasn’t that we haven’t been selling eggs and ketchup to youths, but have been careful about who we have sold them to, and we are glad it has been making a difference.”

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.

Monday, November 9, 2009

Former Formula One McLaren designer Gordon Murray has unveiled a new all-electric car.

The car model, which is known as the T.27, is due to be developed over the course of the next 16 months with four prototypes. The process that will be used during the course of the manufacturing of the vehicle is called iStream. The technology iStream had been invented by Gordon Murray in 1999 and means that all the parts are designed using a computer.

The project has approximately received £9,000,000 (US$14,919,000) in investment. The electric car is designed for urban purposes, such as in cities or towns. The weight of the vehicle is just 600 kilograms. It has the ability to travel at speeds of up to 60 miles per hour and can go for a maximum of 100 miles between recharges.

The designer thinks that motorists will some day be travelling in vehicles like this. Murray believes that the new car will be ‘the most efficient electric vehicle on earth’.

Monday, September 5, 2005

Brazil —The Post Office and Vote Buying parliamentary commissions of investigation unanimously approved on Thursday (1) their first joint preliminary report of activities. The text was prepared by their redactors, Osmar Serraglio (PMDB) and Ibrahim Abi-Ackel (PP), from Post Office and Vote Buying commissions respectively.

The deputies cited in the report are: Carlos Rodrigues (PL–RJ), José Janene (PP-PR), Pedro Correia (PP-PE), Pedro Henry (PP-MS), Sandro Mabel (PL-GO), João Magno (PT–MG), João Paulo Cunha (PT-SP), José Borba (PMDB-PR), Josias Gomes da Silva (PT-BA), Paulo Rocha (PT-BA), Professor Luizinho (PT-SP), Romeu Queiroz (PTB-MG), Vadão Gomes (PP-SP), Vanderval Santos (PL-SP), José Mentor (PT-SP), Roberto Brant (PFL-MG), José Dirceu (PT-SP) and Roberto Jefferson (PTB-RJ).

The report indicts 18 Brazilian deputies and the former deputy Valdemar Costa Neto [who resigned on August 1]. They are accused of illegal campaign finance activities, of placing cronies in strategic positions in government enterprises and getting kickbacks from them, and of receiving cash payments in exchange for voting in line with the government in the Brazilian Congress.

The redactors called the allegation made by some parliamentarians that the resources were used to settle debts with electoral campaigns a “lame excuse”. According to them it is “perfectly plausible” that the loans taken by the businessman Marcos Valerio at the Banco Rural and the BMG for the ruling Workers’ Party (PT) were false and created to make the illegal funds seem legal.

In regards to the denunciations done by deputy Roberto Jefferson (PTB) the report says:

• Everything which he said that could be investigated showed to be true, including confessions against himself .
• Everything that must be compared to other testimonies showed a great degree of truth. As a matter of fact, all of who, hurriedly, questioned him, saw their defenses collapse, before the successive discoveries.

According to the report, the businessman Marcos Valério is a not reliable person because of his contraditory testmonies.

The report says that several documents were identified and reviewed proving that large sums of money were withdrawn from agencies of the Rural Bank, in Brasilia and Belo Horizonte, as well as from bank accounts of the enterprises SMPB and DNA Propaganda. According to the documents the beneficiaries were federal deputies who received the money in person or through relatives, advisers, or persons nominated by Marcos Valério.

The report affirms that it is possible that some payments were made on a monthly basis, and others more or less frequently. Nevertheless, according to the report the periodicity of the payments is the less important fact.

Thursday, September 20, 2007

The U.S. economy and its currency as an instrument of world trade has suffered a series of major setbacks in recent months. Some analysts say that the Federal Reserve‘s September 18^th dramatic rate cut to 4.75% from 5.25% may be a case of “too little, too late”, or that it was excessive and dooms the dollar.

Today, Saudi officials declined to cut interest rates in lockstep with the US Federal Reserve for the first time in decades. According to Ambrose Evans-Pritchard, International Business Editor for The Daily Telegraph, “it’s a signal that the oil-rich Gulf kingdom is preparing to break the dollar currency peg in a move that risks setting off a stampede out of the dollar across the Middle East.”

Hans Redeker, the Currency Chief at BNP Paribas, also stated today that Saudi Arabia’s move to not adjust their own interest rates in sync with the Fed’s cuts is a very dangerous situation for the US dollar. Redeker points out that “Saudi Arabia has $800bn (£400bn) in their future generation fund, and the entire region has $3,500bn under management. They face an inflationary threat and do not want to import an interest rate policy set for the recessionary conditions in the United States.”

Saudi central bank officials said that “appropriate measures” would be taken to stop the large capital inflows into the country. The Federal Reserve’s half-point rate cut has already caused a plunge in the world dollar index to a fifteen-year low, reaching the weakest level ever against the Euro at just under $1.40.

The Fed hopes that by making it cheaper to borrow, people will start spending and investing more. However, some analysts fear the cut will worsen inflation, making it harder to get personal loans, and further decrease confidence in the dollar around the world. There are already signs that global investors have started rejecting U.S. Treasury securities, and recent U.S. government data on foreign holdings show a decline in purchases of US securities from $97bn to just $19bn in July.

In response to Ben Bernanke‘s statements today about a potential mortgage and housing market crisis, CNN anchor Wolf Blitzer said, “If adjustable mortgage rates go up, people may not be able to afford their mortgage payments.” Former Federal Reserve chief Alan Greenspan said earlier this week that housing prices may fall by “double digits” as the subprime crisis bites harder, prompting households to cut back sharply on spending.

Jim Rogers, the economic commentator and former partner of George Soros, stated, “If Ben Bernanke starts running those printing presses even faster than he’s already doing, we are going to have a serious recession. The dollar’s going to collapse, the bond market’s going to collapse. There’s going to be a lot of problems.”

In recent months, the U.S. dollar has taken several other significant hits including Kuwait’s decision in May to also break its dollar peg, and threats by China to interfere with the U.S. economy, calling it their nation’s “nuclear option”. According to public sources, the Chinese government has begun a concerted campaign of economic threats against the United States, hinting that it may liquidate its vast holding of US treasuries if Washington imposes trade sanctions that seek to force a Yuan revaluation.