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Sunday, October 16, 2011

Wireless bike brake works most of the time

Researchers have developed a wireless bike brake that works almost all the time, a proof-of-concept idea that could open the door to wireless brakes on planes and trains.
Angelika Klein
Computer scientist Holger Hermanns presents
the wireless bicycle brake at Saarland University.
A wireless bike brake is just what it sounds like — instead of a cable snaking down the frame to stop the wheels from spinning when a lever is pulled, the stop signal is sent wirelessly.

What's more, the signal is sent by clenching the rubber grip on the handle bar instead of pulling a lever. A pressure sensor in the rubber activates the signal, which is sent via radio waves to a receiver on the bike's fork that activates a disk brake.

The set-up works 99.999999999997 percent of the time, according to Holger Hermanns, a computer scientist at Saarland University in Germany, who designed and measured the performance of the brake.

"This implies that out of a trillion braking attempts, we have three failures," he said in a news release. "That is not perfect, but acceptable." 

Brakes of any sort are never 100 percent fail-safe, but relying on the same type of fickle wireless technology your laptop uses to connect to the Internet or your cell phone to make calls seems risky.
Nevertheless, wireless systems are trending in the direction of implementation in areas where failure isn't an option, such as stopping trains and airplanes.

Concrete plans for wireless brakes on European trains already exist, according to Hermanns. But testing wireless brakes on a train is a complex and risky proposition. That's why he built the wireless bike brake.

"The wireless bicycle brake gives us the necessary playground to optimize these methods for operation in much more complex systems," he said.

The researchers tested the effectiveness with the same algorithms used for aircraft and chemical factories, where failure also is much more serious than a bike that loses its brakes.
While trains and planes of the future could indeed stop with the application of wireless brakes, for now Hermanns says he is looking for engineers to optimize the system for bikes.

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Published by Gusti Putra at: 3:03 PM
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Mexico's newest export to US: Water

Expanding desalination efforts a strategy by nations to wean away from Colorado River

SAN DIEGO — Mexico ships televisions, cars, sugar and medical equipment to the United States. Soon, it may be sending water north.
San Diego County Water Authority  /  AP
Water gushes from an electricity plant in Playas de Rosarito, Mexico, next to a site where government agencies in the western United States are considering putting large desalination plants. Details are being worked out, but these vast amounts of water used at the electricity plant could be used for desalination at the proposed site.
Western states are looking south of the border for water to fill drinking glasses, flush toilets and sprinkle lawns, as four major U.S. water districts help plan one of two huge desalination plant proposals in Playas de Rosarito, about 15 miles south of San Diego. Combined, they would produce 150 million gallons a day, enough to supply more than 300,000 homes on both sides of the border.

The plants are one strategy by both countries to wean themselves from the drought-prone Colorado River, which flows 1,450 miles from the Rocky Mountains to the Sea of Cortez. Decades of friction over the Colorado, in fact, are said to be a hurdle to current desalination negotiations.

The proposed plants have also sparked concerns that American water interests looking to Mexico are simply trying to dodge U.S. environmental reviews and legal challenges.
Desalination plants can blight coastal landscapes, sucking in and killing fish eggs and larvae. They require massive amounts of electricity and dump millions of gallons of brine back into the ocean that can, if not properly disposed, also be harmful to fish.

But desalination has helped quench demand in Australia, Saudi Arabia and other countries lacking fresh water.

Dozens of proposals are on the drawing board in the United States to address water scarcity but the only big project to recently win regulators' blessings would produce 50 million gallons a day in Carlsbad, near San Diego. A smaller plant was approved last year in Monterey, some 110 miles south of San Francisco.
Mexico is a relative newcomer to desalination. Its largest plant supplies 5 million gallons a day in the Baja California resort town of Cabo San Lucas, with a smattering of tiny ones on the Baja peninsula. Skeptics already question the two proposed plants in Playas de Rosarito — known as Rosarito Beach to American expatriates and visiting college spring-breakers.

"It raises all kinds of red flags," said Joe Geever, California policy coordinator for the Surfrider Foundation, an environmentalist group that has fought the Carlsbad plant for years in court, saying it will kill marine life and require too much electricity.

Water agencies that supply much of Southern California, Phoenix, Las Vegas and Tijuana, Mexico, are pursuing the plant that would produce 50 million gallons a day in Rosarito near an existing electricity plant. They commissioned a study last year that found no fatal flaws and ordered another one that will include a cost estimate, with an eye toward starting operations in three to five years.

Potential disagreements between the two countries include how the new water stores will be used.
The U.S. agencies want to consider helping pay for the plant and letting Mexico keep the water for booming areas of Tijuana and Rosarito. In exchange, Mexico would surrender some of its allotment from the Colorado River, sparing the cost of laying pipes from the plant to California.
Mexico would never give up water from the Colorado, which feeds seven western U.S. states and northwest Mexico, said Jose Gutierrez, assistant director for binational affairs at Mexico's National Water Commission. Mexico's rights are enshrined in a 1944 treaty.

"The treaty carries great significance in our country. We have to protect it fiercely," Gutierrez said.
Rick Van Schoik, director of Arizona State University's North American Center for Transborder Studies, said laying a pipeline across the border would be too costly.
"It's expensive enough to desalinate. I just don't see how it calculates out," he said.

The other big plant proposal joins Consolidated Water Co., a Cayman Islands company, with Mexican investors. Their proposal would send much of its 100 million gallons a day from Rosarito to the United States via a new pipeline, with operations beginning in 2014.

Mexico isn't likely to approve both plants, said Gutierrez, whose government is sponsoring the 50-million-gallon-a-day plant with the Metropolitan Water District of Southern California, the San Diego County Water Authority, the Central Arizona Water Conservation District and the Southern Nevada Water Authority.
A key question is whether Mexico will allow water first used at the neighboring electric plant to be desalinated — a giant potential savings. California recently adopted rules that prohibit the state's electric plants from sucking in vast amounts of seawater to cool their machinery.

The Carlsbad plant illustrates how difficult it can be to build a plant in California. Poseidon Resources Corp., based in Stamford, Conn., has survived about a decade of legal challenges and regulatory review.
The company, which plans to begin major construction when it secures financing, was required to restore 66 acres of wetlands and take other measures to offset carbon emission from the electricity it consumes.

The San Diego County Water Authority is also considering a plant at Southern California's Camp Pendleton that would produce up to 150 million gallons a day. Poseidon wants to build one in Huntington Beach, near Los Angeles, that would churn out 50 million gallons a day. Those ideas face significant challenges.
"The planets will never be in alignment like they were in Carlsbad," said Tom Pankrantz, editor of Water Desalination Report. "They had the right project, at the right place, at the right time."

The San Diego agency wants to get 10 percent of the region's water from desalination by 2020 as a way to lessen its dependence on the Colorado River, which is connected by aqueduct about 200 miles away. Tijuana also wants to rely less on the river, a priority that gained urgency after a 2010 earthquake knocked out its aqueduct for about three weeks.

The U.S. and Mexico can save money by joining forces, achieving economies of scale, said Halla Razak, the San Diego agency's Colorado River program manager. At least half of the plant's water would stay in Mexico, she said.
"Mexico is the entity that is driving the project, even more than the United States," she said.

U.S. and Mexican officials say they expect the new plants will adhere to the same standards as California, including water quality, but that Mexico's regulators may act faster and shield sponsors from legal challenges.
"The Mexicans will ask all the same questions that we ask here, but it's not endless lawsuits," said Mark Watton, general manager of Otay Water District, which would buy about 20 million gallons a day from Consolidated's Mexico plant for its San Diego-area customers. "You get an answer quicker."

Quoted from MSN



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Published by Gusti Putra at: 2:37 PM
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11 Warning Signs of Depression


Is it really depression or just a case of the blues? It's not always easy to tell the difference, especially when an older adult has what seems like good reason to be depressed, such as a chronic illness or loss of a loved one. But depression is very different from the blues in terms of duration and severity.

Most cases of the blues resolve on their own and don't prevent a person from finding some enjoyment in life. The key components of depression are:
  • Duration: The symptoms are present almost all the time and last for more than a few weeks.
  • Severity: Depression is usually more severe, causing symptoms that are difficult enough to deal with that they interfere with daily life.


Here are 11 different warning signs of depression. Keep in mind that depressed people don't all experience the same symptoms, and the severity of symptoms may vary. But if someone exhibits several of these symptoms for more than two weeks, he may need help.

1. Persistent sad, anxious, or "empty" feelings
2. Feelings of hopelessness, worthlessness, or helplessness
3. Frequent crying episodes
4. Increased agitation and restlessness
5. Fatigue and decreased energy
6. Loss of interest in activities or hobbies that once were pleasurable
7. Difficulty concentrating, remembering details, and making decisions
8. Sleeping too much or not enough
9. Poor appetite or overeating
10. Expressing thoughts of dying or suicide
11. Persistent aches or pains, headaches, cramps, or digestive problems that don't ease with treatment.

Quoted from CARING
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Published by Gusti Putra at: 12:08 PM
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Protests go global, rampage, tear gas in Rome

Hundreds of hooded, masked protesters rampaged through Rome in some of the worst violence in the Italian capital for years Saturday, torching cars and breaking windows during a larger peaceful protest against elites blamed for economic downturn.
A demonstrator celebrates as a Carabinieri police vehicle burns 
during a demonstration of the "Indignant" group in Rome on Saturday.
Police repeatedly fired tear gas and water cannon in attempts to disperse them but the clashes with a minority of violent demonstrators stretched into the evening, hours after tens of thousands of people in Rome joined a global "day of rage" against bankers and politicians.

Smoke rose over many parts of the neighborhood between the Colosseum and St John's Basilica, forcing many residents and peaceful demonstrators to run into buildings and churches for shelter as militant protesters ran wild.

After police managed to push the well-organized radicals away from the St. John's area, they ravaged a major thoroughfare, the Via Merulana — building barricades with garbage cans and setting the netting of the scaffolding of a building on fire.

Discontent is smoldering in Italy over high unemployment, political paralysis and 60 billion euros ($83 billion) of austerity measures that have raised taxes and the cost of health care.

The violence at times resembled urban guerrilla warfare as protesters hurled rocks, bottles and fireworks at police, who responded by repeatedly charging the demonstrators.
Around 70 people were injured, according to news reports, including one man who tried to stop the protesters from throwing bottles.


Rome Mayor Gianni Alemanno blamed the violence on "a few thousand thugs from all over Italy, and possibly from all over Europe, who infiltrated the demonstration." Some Rome museums were forced to close down and at least one theater canceled a show.
Protesters also set fire to a building, causing the roof to collapse, reports said. The Defense Ministry denied reports it was one of its offices.

Premier Silvio Berlusconi called the violence a "worrying signal," and added that the perpetrators "must be found and punished."


Story: Wall Street protesters march to Times Square
Berlusconi barely survived a confidence vote Friday, with many questioning his leadership. Italy's debt burden is second only to Greece in the 17-nation eurozone and the country is rapidly becoming a focus of concern in Europe's debt crisis.

At one point radicals surrounded a police van near St John's Basilica, pelted it with rock and bottles, and set it on fire. The two occupants managed to escape, television footage showed.

Some peaceful demonstrators also clashed with the militants and turned some of them over to police.
A day of worldwide protests inspired by the Occupy Wall Street movement in the United States began Saturday with the hundreds of people gathering in cities from Japan and South Korea to Australia.
Organizers had hoped to see non-violent demonstrations in 951 cities in Asia, Europe, South America and Africa in addition to every state in the United States.

Frankfurt 
In the continental Europe's financial capital, some 5,000 people protested in front of the European Central Bank, while in London, around 500 people marched from St. Paul's cathedral to the nearby stock exchange.
A website called 15october.net urged the people of the world to "rise up" and "claim their rights and demand a true democracy."

"Now it is time for all of us to join in a global non violent protest. The ruling powers work for the benefit of just a few, ignoring the will of the vast majority and the human and environmental price we all have to pay. This intolerable situation must end," the website says.

Sydney 
About 2,000 people, including representatives of Aboriginal groups, communists and trade unionists, protested outside the central Reserve Bank of Australia.


"I think people want real democracy," said Nick Carson, a spokesman for OccupyMelbourne.Org. "They don't want corporate influence over their politicians. They want their politicians to be accountable."
The crowd cheered a speaker who shouted, "We're sick of corporate greed! Big banks, big corporate power standing over us and taking away our rights!"

Danny Lim, a 67-year-old immigrant from Malaysia, said he moved to Australia 48 years ago in search of opportunities.

Now he no longer trusts the government to look after his best interests. He thinks Australia's government has become too dependent upon the U.S. for direction.
"The big man — they don't care. They screw everyone. Eventually we'll mortgage our children away," Lim said.

Tokyo 
Where the ongoing nuclear crisis dominates public concerns, about 200 people joined the global protests Saturday.

Under the light drizzle, the participants marched outside the Tokyo Electric Power Co., which operates the tsunami-hit Fukushima Dai-ichi nuclear plant, chanting anti-nuclear slogans, while opposing the U.S.-led Trans-Pacific Partnership free trade bloc that Japan is considering joining.
"No to nuclear power," the marchers chanted as they held up banners.


Taiwan 
Over 100 people gathered at the Taipei 101 skyscraper, home to the stock exchange, chanting "we are Taiwan's 99 percent", saying economic growth had only benefited companies while middle-class salaries barely covered soaring housing, education and healthcare costs.

A man holds a placard during a protest to express anger at "the inequities and excesses of free-market capitalism" in Hong Kong

They found support from a top businessmen, Taiwan Semiconductor Manufacturing Corp Chairman Morris Chang, who told reporters in the northern city of Hsinchu that 

Taiwan's income gap was a serious issue.
"I've been against the gap between rich and poor," Chang said. "The wealth of the top 1 percent has increased very fast in the past 20, 30 years. 'Occupy Wall Street' is a reaction to that. We have to take the issue seriously..."

Manila 
About 100 members of various groups under the Philippine left-wing alliance, Bayan, marched on the U.S. Embassy Saturday morning to express support for the Occupy Wall Street protests in the United States and to denounce "U.S. imperialism" and U.S.-led wars and aggression.

They carried a large banner that said, "Resist imperialist plunder, state repression and wars of aggression," and another expressing "Solidarity action for Occupy Wall Street."

They also chanted "U.S. troops, out now!" in reference to the presence of hundreds of U.S. soldiers, mostly in the southern Philippines, involved in anti-terrorism training of Filipino troops. One man carried a placard saying "Genuine people's democracy lives in the streets."

South Korea 
In South Korea, activists gathered on the streets of Seoul.
The Korea Herald newspaper reported that a coalition of 30 local civic groups planned to hold a two-day protest in the main financial district of Yeouido and other parts of the capital.

The protesters, who have adopted slogans and imagery used by those in the U.S., say the rally is designed to motivate "99 percent of Koreans" to complain about the actions of the wealthiest "1 percent," the paper said.
"The situation is the same in South Korea (as the U.S.), where the financial institutions have speculated to earn high profits in a short time, creating victims," the coalition said in a statement, the Herald reported.
The protesters want compensation for people who lost money in the banking crisis.

Seoul police warned that damaging public facilities, occupying roads and assaulting police officers would not be tolerated, the Herald said.
"We will arrest those who stage illegal protests on the spot and also seek legal action even after the rally ends," the Seoul Metropolitan Agency said in a release, the paper reported.

The call for mass protests around the world Saturday originated a month ago from a meeting in Spain, where mostly young and unemployed people angry at the country's handling of the economic crisis have been demonstrating for months.
It was reposted on the Occupy Wall Street website and has been further amplified through social media.

London 
Protesters in London vowed to occupy the London Stock Exchange Saturday. Nights of rioting rocked the British capital in August after the fatal police shooting of a 29-year-old man.


"We have people from all walks of life joining us every day," said Spyro, one of those behind a Facebook page in London which has grown to some 12,000 followers in a few weeks.

Spyro, a 28-year-old who has a well-paid job and did not want to give his full name, summed up the main target of the global protests as "the financial system."

Canada 
Protests were planned for Saturday in cities including Montreal and Vancouver. In Toronto, demonstrators plan to gather at Canada's main stock exchange.

Prime Minister Stephen Harper said he doubted Canadians would be as angry as their neighbors to the south as Canadian banks have not received a U.S.-type bailout.

He declined to comment when asked if he was concerned about a possible repeat of street violence that Toronto experienced at the G-20 summit last year.

New York 
In the United States, the hundreds of protesters at Manhattan's Zuccotti Park — site of the original Occupy protest — called for more people to join them.

Politicians in both President Barack Obama's Democratic Party and the Republican Party struggled to come up with a response to the growing nationwide movement.

Democrats have been largely supportive but also wary of endorsing criticism of Obama's rescue of big banks in the aftermath of the 2008 financial crisis. The bank bailout was launched in the last months of President George W. Bush's administration.

Republicans at first criticized the demonstrations but have shifted their tone in recent days.
House Majority Leader Eric Cantor warned of "growing mobs" but later said the protesters were "justifiably frustrated."

Quoted from MSN








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Published by Gusti Putra at: 11:52 AM
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