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Saturday, March 14, 2009

Investigators with the National Transportation Safety Board in the United States have issued an ‘urgent safety recommendation’ in connection to their role alongside the United Kingdom’s Air Accidents Investigation Branch in investigating loss of power in Rolls-Royce engines on Boeing 777s, with the AAIB following suit. One of them resulted in British Airways Flight 38 crashing short of the runway at London’s Heathrow Airport last year. The NTSB and the AAIB want Rolls-Royce to redesign the engines.

Both events occurred on Boeing 777-200ER airplanes powered by Rolls-Royce RB211 Trent 800 Series engines. On January 17, 2008 British Airways Flight 38 experienced a dual engine rollback (reduction of engine power) on final approach to Heathrow and crashed, leaving one passenger seriously injured, eight passengers and four of the flight crew with minor injuries and the airplane written off.

The second event occurred on November 26, 2008, when a Delta Air Lines Boeing 777 experienced a single engine rollback during cruise flight over Montana, United States while en route from Shanghai to Atlanta. Normal operations resumed after the flight crew followed Boeing’s published procedure to recover engine performance and the airplane landed safely in Atlanta.

Boeing has already developed new procedures after the crash to prevent ice from building up within their 777 fuel systems after it became apparent that icing may have been a factor, and it was some of these that the Delta flight crew had followed. Boeing modified these further after the Delta incident. As part of the recent releases by the NTSB and AAIB it has become apparent that investigators from both bodies, which are collaborating, have found ice buildup in the fuel system caused both rollbacks.

In both cases a build-up of ice (from water normally present in all jet fuel) developed on a component called the fuel/oil heat exchanger. This restricted the flow of fuel to the engine, resulting in the uncommanded engine rollback. Investigators initially struggled to produce enough ice under test conditions but have now found that at high concentration, fuel can form ice at very low temperatures in enough quantity to seriously restrict fuel flow, according to a new interim report by the AAIB. This does not occur when fuel demand is lower, as the hot oil then becomes sufficient to entirely melt the ice. The British jet experienced very low temperatures over Siberia.

The vigorous tests are thought to be the first of their kind. They have also confirmed that while ice may have formed elsewhere in the airliner’s fuel system fuel was probably not restricted at any other location. Instead, it is thought ‘soft’ ice formed in the pipes and then broke off, travelling to the fuel/oil heat exchanger and restricting it.

The NTSB has now revealed that they have advised Rolls-Royce to redesign the fuel/oil heat exchanger, and Rolls-Royce have stated that they are indeed working on a replacement part that will be available within twelve months. The AAIB advised Boeing and Rolls-Royce to jointly review the problem across the fuel system, and both companies responded that they ‘accepted’ this recommendation and repeated that a replacement part was being developed.

Both the NTSB and the AAIB also sent letters to the US Federal Aviation Administration and the European Aviation Safety Agency requesting the installment of the modified component be mandatory. The NTSB suggested this should be either the next maintenance check or within six months. There are 220 Boeing 777-200s – the only type using the affected engine – with Trent 800 series engines.

The fuel/oil heat exchanger is a dual purpose part designed to simultaneously melt fuel ice and cool down engine oil.

The AAIB further noted that it is unclear weather other aircraft designs are at risk, and advised the FAA and EASA to look into increased use of de-icing additives and investigate both the accumulation and sudden movement of ice in aircraft fuel systems and the actual formation of ice in the fuel itself.

Saturday, December 2, 2006

As families fled their homes in the early morning hours on Thursday October 26, there was no warning. The Esperanza Fire southeast of Los Angeles and West of Palm Springs, California, had ballooned under the influence of Santa Ana winds to more than 19,000 acres as of the morning of October 27. No time to get the animals, no time for crates or even a leash. Sadly, owners left behind not only their horses, lamas, donkeys, chickens, rabbits, but also their dogs and cats.

Many of the families who did manage to evacuate their pets found themselves in the parking lot at the Fellowship in the Pass Church Red Cross Shelter where a MuttShack Animal Rescue team caught up with them.

Pam Anderson, Director of the emergency Red Cross shelter said that many people with animals had come and left.

The air was thick with smoke, and ash was raining down on the parking lot where dog owners, not able to take their dogs into the shelter were camping out in pup tents andin their cars.

Those who could afford it checked themselves into pet friendly hotels in nearby towns.

Some were prepared. Jane Garner, a small dog breeder was able to get all her animals out, and had set up her puppy runs alongside her RV in the parking lot. Others were not doing too well, having left home without as much as a leash.

The same scenario played out at the Red Cross shelter at Hemet High School. Animals were being boarded in vans, trailers and cars and small travel crates.

When MuttShack Animal Rescue arrived, a small fracas had sent several dogs off in different directions, running out of the school parking lot down busy streets necessitating an instant rescue response.

The Incident Command for the Esperanza Animals, Ramona Humane Society in San Jacinto welcomed MuttShack‘s offer to help at the shelters.

Ramona Humane Society had recently published a notice in their Newsletter about the newly passed “PETS Act”and warned owners not wait until a major disaster such as an earthquake or fireto prepare. “Be proactive to ensure that your pet will be taken care of.”

MuttShack and PetSmart Charities set up ad hoc facilities for the animals at both shelters.

The Red Cross shelter, run by Madison Burtchaell of the Orange County Red Cross was very accommodating about allowing a small emergency pet shelter adjacent to the School.

Barbara A. Fought of PetSmart Charities, an organization that works with animal welfare organizations and provide assistance in disasters, provided crates and emergency supplies.

MuttShack and Red Cross volunteers, Martin St. John, Tom Hamilton, and Steve Meissner helped assemble the crates to secure a safe environment for evacuated pets.

It was a great relief for evacuees who had camped out in the parking lot to finally leave their vehicles and relax at the shelter, setting up their cots to grab some sorely needed rest.

Firefighters and residents reported loss of wildlife and animals. The Esperanza fire burned 34 homes, consumed 40,000 acres and cost five Firefighters their lives before it was contained four days later on October 30. Firefighting operations cost nearly $10 million.

MuttShack Animal Rescue is a 501(c) 3 non-profit organization active in disasters and dedicated to the rescue, rehabilitation and care of lost or discarded dogs, cats and other animals.

Tuesday, January 24, 2006

A recent study led by Dr. Drew Westen, a Professor of Psychology at Emory University in Atlanta, Georgia has concluded that political partisans use an “almost entirely emotional and unconscious” thought process when digesting damaging information about a favored political candidate.

The experiment used fMRI scans of 30 men who self-identified as either a committed Republican or Democrat. The subjects were given a series of conflicting quotes by either President Bush or Senator Kerry, and covered such topics as the Enron scandal and the current state of Social Security. The quotes were doctored to maximize the apparent contradiction, but were presented as factual.

The results suggests that many seemingly rational political decisions are strongly influenced by unconscious emotional reactions. Such conclusions match well results from advertising psychology which say that purchases are also not as rational as people believe. Past fMRI studies have found that Democrat and Republican partisans tend to experience different emotions when shown an image of a preferred candidate.

Westen will present his results next month at a meetings of the Society for Personality and Social Psychology in Palm Springs, CA.

Sunday, April 24, 2011

An investigation by the United States Coast Guard has concluded the largest oil spill in the history of the petroleum industry was partly the result of a “poor safety culture” aboard the Deepwater Horizon oil rig. The April 2010 explosion aboard the rig, which is located in the Gulf of Mexico, triggered a disaster that led to widespread environmental damage.

The report squarely blames Transocean, which managed the Deepwater Horizon, for being largely responsible for the explosion that claimed eleven lives. The rig had “serious safety management system failures and a poor safety culture,” the report says. Transocean fiercely rejected allegations that crews aboard the rig were badly trained and equipment was poorly maintained.

A slapdash safety environment on Deepwater Horizon would mean equipment was not mended or replaced if it meant losing valuable hours of drilling, the Coast Guard found. Electrical equipment believed to have caused a spark that ignited flammable gas was described as being in “bad condition” and “seriously corroded.” The report found that other deficiencies—improperly assembled gas detectors and emergency equipment; audible alarms switched off because of nuisance false warnings; complacency with fire drills; and poor preparation for dealing with a well blowout—all contributed to the disaster.

Transocean attacked the report’s conclusions and suggested the Coast Guard may have played a role in the disaster. A spokesperson for the company said Deepwater Horizon had been inspected by Coast Guard officials only months before the explosion, officials who said it complied with safety standards. “We strongly disagree with—and documentary evidence in the Coast Guard’s possession refutes—key findings in this report,” the company said.

This week, Deepwater Horizon owner BP launched legal action against Transocean. It also filed a lawsuit against Halliburton, the company that cemented the well, and Cameron, which manufactured the rig’s failed blowout preventer. BP is reportedly seeking to claim US$40 billion in damages, and alleges it has taken a massive financial hit and loss of reputation. In a statement, BP said it filed the lawsuits “to ensure that all parties … are appropriately held accountable for their roles in contributing to the Deepwater Horizon accident”.

In the lawsuit against Transocean, BP claims the company missed signs that a disaster was imminent and that it “materially breached its contractual duties in its actions and inactions leading to the loss of well control, the explosion and the loss of life and injuries onboard the Deepwater Horizon, as well as the resulting oil spill.” Halliburton, BP alleges, was riddled with “improper conduct, errors and omissions, including fraud and concealment” which led to the disaster, and continues to refuse to cooperate with investigators.

Transocean dismissed the lawsuit as “desperate” and “unconscionable,” and announced a countersuit against BP, which it claims was responsible for the disaster “through a series of cost-saving decisions that increased risk, in some cases severely.” Halliburton and Cameron, which is also countersuing, announced they would defend themselves against BP’s allegations.

U.S. President Barack Obama marked the anniversary of the explosion by conceding that although “progress” has been made to ensure the safety of deep water drilling rigs, “the job isn’t done.” Obama’s comments came less than a week after leading experts raised serious questions over the security of deep water drilling as the U.S. government approves more exploration without improving safety measures.

Charles Perrow, a professor at Yale University, said the oil industry “is ill prepared at the least” to deal with another oil spill, despite repeated assurances from the industry and the government, which insists lessons have been learned from the Deepwater Horizon disaster. “I have seen no evidence that they have marshaled containment efforts that are sufficient to deal with another major spill,” he said. “Even if everybody tries very hard, there is going to be an accident caused by cost-cutting and pressure on workers. These are moneymaking machines and they make money by pushing things to the limit.”

However, politicians have insisted they are doing all they can to help clean the coast of oil. “Cleanup efforts in some places are still ongoing, and the full scale of the damage done to our state has yet to be calculated, but the good news is that most all of our fishing waters are back open again,” said Louisiana Governor Bobby Jindal at a press conference. “All of us here today want the entire nation to get the message that Louisiana is making another historic comeback.”

Gulf Coast residents, activists and relatives of the crewmen who were killed in the explosion paused this week for the anniversary of the oil spill’s beginning. A helicopter took the victims’ families from New Orleans to over the site where the rig stood, where it circled. “It was just a little emotional, seeing where they were,” said one victim’s mother. Remembrance services and candlelight vigils were held in the Gulf Coast region, which continues to suffer from the fallout of the catastrophe. The families have expressed anger at BP, who they say is being unfair and slow in paying out compensation from a $20 billion fund.

The area is still heavily affected by the disaster and reconstruction of the seafood industry that once thrived is slow. While tourists are beginning to return to the region, many are angry at BP and the Obama administration over how they handled the disaster. All the fishing waters in the area have now opened again, but people who live in the area remain dissatisfied. “I don’t see any daylight at the end of this tunnel,” one fisherwoman said. “I don’t see any hope at all. We thought we’d see hope after a year, but there’s nothing.”

Thursday, February 24, 2005

A paste containing synthetic tooth enamel can seal small cavities without drilling. Kazue Yamagishi and colleagues at the FAP Dental Institute in Tokyo say that the paste can repair small cavities in 15 minutes.

Currently, fillers don’t stick to such small cavities so dentists must drill bigger holes. Hydroxyapatite crystals, of which natural enamel is made, bond with teeth to repair tiny areas of damage.

Yamagishi and colleagues have tested their paste on a lower premolar tooth that showed early signs of decay. They found that the synthetic enamel merged with the natural enamel. The synthetic enamel also appears to make teeth stronger which will improve resistance to future decay. As with drilling, however, there is still the potential for pain: The paste is strongly acidic to encourage crystal growth and causes inflammation if it touches the gums.

The paste is reported in the journal Nature.

Saturday, April 24, 2010

Trusteer, a web security company, reports that a trojan horse virus called Zeus can steal online banking details from infected computers. The virus has infected one out of every 3,000 computers of the 5,500,000 million which the company monitors in the United States and the United Kingdom.

The trojan can infect users of Mozilla Firefox and Microsoft Internet Explorer on Microsoft Windows, and steals login information by recording keystrokes when the machine connects to certain websites, usually banks or other financial institutions. The stolen data is transmitted to a remote server and sold to cyber-criminals. “We expect this new version of Zeus to significantly increase fraud losses, since nearly 30% of Internet users bank online with Firefox and the infection is growing faster than we have ever seen before,” said Amit Klein, chief technology officer at Trusteer, to BBC.

The trojan has also affected Wikinews users, including Brian McNeil, who is the founder of Wikinewsie, a restricted-access wiki used to collaborate on sensitive news reports. McNeil reported on his userspace: “On Saturday [April] 17, a Windows-based PC in the house issued a cry for help, the Avira package running on the system had just detected a piece of malware; full scans indicated several known pieces of malware and numerous hidden files. Additional scans revealed that all but one of the USB memory sticks and portable hard drives in the house were infected with something. The Zeus botnet, as it turned out.” E-mail accounts for accredited reporters have also been affected.

Tuesday, April 14, 2020

In February 2017, the Iranian Chess Federation announced two teenage chess players, Dorsa Derakhshani and her younger brother Borna Derakhshani, were banned from representing the national team. The federation announced their decision although Dorsa Derakhshani had previously decided and informed the chess federation she did not wish to play for Iran.

Dorsa Derakhshani is currently 21 years old and holds the International Master (IM) as well as Woman Grand Master (WGM) titles. Her brother, Borna, plays for the English Federation and holds the FIDE Master title.

Dorsa Derakhshani was banned since she did not wear a hijab, an Islamic headscarf, while competing at the Tradewise Gibraltar Chess Festival in January 2017. Under the laws of Islamic Republic of Iran, hijab is a mandatory dress code. Her brother Borna Deraskhsani was banned for playing against Israeli Grand Master (GM) Alexander Huzman at the same tournament. Iran does not recognise the existence of Israel, and previously, Irani athletes have avoided playing against Israeli athletes.

Mehrdad Pahlavanzadeh, the president of the country’s chess federation, explained the decision to ban the players saying, “As a first step, these two will be denied entry to all tournaments taking place in Iran and in the name of Iran, they will no longer be allowed the opportunity to be present on the national team.” ^{((fa))Farsi language: ?????? ????? ?? ??? ??? ?? ??? ????? ?? ?? ???? ???????? ?? ?? ????? ? ?? ??? ????? ?????? ??????? ????? ??????? ? ???? ???? ???? ?? ??? ??? ?? ??????? ????.} He further stated, “Unfortunately, something that should not have happened has happened and our national interest is paramount and we have reported this position to the Ministry of Sports.” ^{((fa))Farsi language: ????????? ?????? ?? ????? ????????? ?????? ??? ? ????? ??? ?? ?? ?? ???? ?????? ???? ? ?? ??? ???? ?? ?? ????? ???? ?? ????? ?????.}

IM Dorsa Derakhshani, who currently studies at Saint Louis University in the United States and plays for the United States Chess Federation, discussed her chess career, time in Iran and the 2017 controversy, and her life in Saint Louis with a Wikinews correspondent.