The team is calling for more measures to reduce christian louboutin the impact of shift working following the results of its study.
Researchers controlled the lives of 21 people, including meal and bedtimes.
The results, published in Science Translational Medicine, showed changes to normal sleep meant the body struggled to control sugar levels.
Some participants even developed early symptoms of diabetes within weeks.
Shift work has been associated with a host of health problems.
Doctors at Brigham and Women's Hospital, in the US, were trying to study its effects in a controlled environment.
Lower insulin levels
The 21 health-trial participants started with 10 hours' sleep at night. This was followed by three weeks of disruption to their sleep and body clocks.
The 21 health-trial participants started with 10 hours' sleep at night. This was followed by three weeks of disruption to their sleep and body clocks.
Continue reading the main story
“Start Quote
The evidence is clear that getting enough sleep is important for health, and that sleep should be at night for best effect”
Dr Orfeu Buxton Brigham and Women's Hospital
The length of the day was extended to 28 hours, Christian Louboutin Sandals creating an effect similar to a full-time flyer constantly getting jet lag.
Participants were allowed only 6.5 hours' sleep in the new 28-hour day, equivalent to 5.6 hours in a normal day. They also lived in dim light to prevent normal light resetting the body clock.
During this part of the study, sugar levels in the blood were "significantly increased" immediately after a meal and during "fasting" parts of the day.
The researchers showed that lower levels of insulin - the hormone that normally controls blood sugar - were produced.
Three of the participants had sugar levels which stayed so high after their meals they were classified as "pre-diabetic".
They also highlighted a risk of putting on weight as the body slowed down.
"The 8% drop in resting metabolic rate that we measured in our participants... translates into a 12.5-pound increase in weight over a single year," they wrote.
Lead researcher Dr Orfeu Buxton said: "We think these results support the findings from studies showing that, in people with a pre-diabetic condition, shift workers who stay awake at night are much more likely to progress to full-on diabetes than day workers.
"Since night workers often have a hard time Christian Louboutin Marpop Red Patent Leather Wedges sleeping during the day, they can face both circadian [body clock] disruption working at night and insufficient sleep during the day.
"The evidence is clear that getting enough sleep is important for health, and that sleep should be at night for best effect."
The research group called for more efforts to reduce the health impact of shift working.
Artificial world
Dr Matthew Hobbs, head of research at Diabetes UK, said: "This is an interesting study which shows that under extreme conditions involving sleep deprivation and 'tricking' the body clock, participants produced less insulin and therefore had higher blood glucose levels then when they were able to sleep normally and live according to normal daily rhythms."
He cautioned that the laboratory conditions were not the same as working nights.
"Clearly, this does not equate to the normal experience of shift workers who are able, for example, to use bright lights when not sleeping.
"The study also involved only 21 people. For these reasons, it is not possible to conclude that the findings would translate to real conditions in the wider public."
Tweaking memories related to drug abuse may keep addicts from relapsing, a new study published Friday in Science journal reported.
A group of Chinese scientists found that memories that connect drug-related "cues" such as needles or cigarettes to the pleasurable effects of drugs play a large role in Dooney Bourke Handbag former drug users' relapses, BBC News reported.
Lin Lu of the National Institute of Drug Dependence at Peking University in Beijing and his team combined traditional memory "extinction" procedures with a process called memory reconsolidation, Medical Daily reported.
More from GlobalPost: Study suggests some brains are wired for addiction
The scientists worked with 66 former heroin addicts, 22 of which had not taken the drug for an average of 11 years. Half the group was initially shown a short video of drug use to "open" their memory window, followed by "extinction sessions" where they interacted with more cues of heroin use, including handling fake heroin, Science News reported.
The other half of the group were initially shown a video of the countryside, which would not open the window, and then the drug-related visuals, BBC reported.
The researchers also varied the time between the initial reminder and the "extinction" sessions: Some people waited just 10 minutes, and others waited six hours.
During tests done one, 30, and 180 days later, the researchers found that levels of drug cravings were lower in those who had their memory window "opened" by a visual trigger and then experienced the drug-related cues 10 minutes later. Those participants also showed less of a blood android homme pressure rise in response to seeing drug paraphernalia compared with people who hadn’t received the reminder, Science News reported. Furthermore, those who waited six hours before undergoing the extinction didn’t get the same effect.
2012年4月14日星期六
More northerly colonies are thought to be particularly at risk
Using high-resolution images taken using christian louboutin satellites, researchers analysed 44 colonies of emperor penguins around the coastline of Antarctica.
They found the total emperor penguin population could be put at 595,000, roughly double previous estimates of 270,000 to 350,000.
The discovery has been welcomed amid concerns that changes to levels of ice on the world's coldest continent could pose a threat to the species.
Peter Fretwell, who led the Christian Louboutin Pumps researchers at the British Antarctic Survey, said: “We are delighted to be able to locate and identify such a large number of emperor penguins. This is the first comprehensive census of a species taken from space.
"It gives us a bit more confidence not only that there are lots of emperor penguins out there but that we can actually keep track of them as well."
The technique used by the scientists allowed them to spot the black and white birds amongst the ice, rock and guano that litter the Antarctic landscape.
Emperor penguins breed in some of the most inhospitable and inaccessible conditions in the world, where temperatures can reach as low as -50C, making them difficult to study.
The satellite images, however, allowed the researchers to conduct the first detailed survey of the species. The study, which is published in the journal PLoS ONE, even identified seven colonies that had never been seen before.
A special technique known as pan-sharpening to increase the resolution of the satellite images allowed the researchers to differentiate between birds, shadows and penguin excrement, or guano.
The study marks the first time that researchers have counted the entire population of any species by satellite in a single season.
Dr Fretwell believes the same technique could also be use to tot Christian Louboutin Metallic Cork Platform Wedges Gold up numbers of other wild animals that stand out clearly against their natural habitat, such as flamingos or reindeer.
Counting other types of penguins from space, however, may not be so easy. While emperors are large and contrast sharply against the white snow and ice on which they stand, other species are smaller and tend to breed on dark-coloured rock.
Michelle LaRue, from the University of Minnesota, said: “The implications of this study are far-reaching: we now have a cost-effective way to apply our methods to other poorly-understood species in the Antarctic, to strengthen ongoing field research, and to provide accurate information for international conservation efforts."
Conservation groups fear emperor penguins will be badly affected by climate change in the Antarctic as the colonies rely upon sea ice. Some research has suggested volumes of sea ice has been decreasing due to global warming.
More northerly colonies are thought to be particularly at risk. The new technique should allow scientists to monitor the impacts on the penguins in real time.
Dr Phil Trathan, a biologist at the British DG Handbag Antarctic Survey, said: “Current research suggests that emperor penguin colonies will be seriously affected by climate change.
"An accurate continent-wide census that can be easily repeated on a regular basis will help us monitor more accurately the impacts of future change on this iconic species.
"The effects of warming around Antarctica are regional and uneven. In the future we anticipate that the more southerly colonies should remain, making these important gucci shoes sites for further research and protection.”
They found the total emperor penguin population could be put at 595,000, roughly double previous estimates of 270,000 to 350,000.
The discovery has been welcomed amid concerns that changes to levels of ice on the world's coldest continent could pose a threat to the species.
Peter Fretwell, who led the Christian Louboutin Pumps researchers at the British Antarctic Survey, said: “We are delighted to be able to locate and identify such a large number of emperor penguins. This is the first comprehensive census of a species taken from space.
"It gives us a bit more confidence not only that there are lots of emperor penguins out there but that we can actually keep track of them as well."
The technique used by the scientists allowed them to spot the black and white birds amongst the ice, rock and guano that litter the Antarctic landscape.
Emperor penguins breed in some of the most inhospitable and inaccessible conditions in the world, where temperatures can reach as low as -50C, making them difficult to study.
The satellite images, however, allowed the researchers to conduct the first detailed survey of the species. The study, which is published in the journal PLoS ONE, even identified seven colonies that had never been seen before.
A special technique known as pan-sharpening to increase the resolution of the satellite images allowed the researchers to differentiate between birds, shadows and penguin excrement, or guano.
The study marks the first time that researchers have counted the entire population of any species by satellite in a single season.
Dr Fretwell believes the same technique could also be use to tot Christian Louboutin Metallic Cork Platform Wedges Gold up numbers of other wild animals that stand out clearly against their natural habitat, such as flamingos or reindeer.
Counting other types of penguins from space, however, may not be so easy. While emperors are large and contrast sharply against the white snow and ice on which they stand, other species are smaller and tend to breed on dark-coloured rock.
Michelle LaRue, from the University of Minnesota, said: “The implications of this study are far-reaching: we now have a cost-effective way to apply our methods to other poorly-understood species in the Antarctic, to strengthen ongoing field research, and to provide accurate information for international conservation efforts."
Conservation groups fear emperor penguins will be badly affected by climate change in the Antarctic as the colonies rely upon sea ice. Some research has suggested volumes of sea ice has been decreasing due to global warming.
More northerly colonies are thought to be particularly at risk. The new technique should allow scientists to monitor the impacts on the penguins in real time.
Dr Phil Trathan, a biologist at the British DG Handbag Antarctic Survey, said: “Current research suggests that emperor penguin colonies will be seriously affected by climate change.
"An accurate continent-wide census that can be easily repeated on a regular basis will help us monitor more accurately the impacts of future change on this iconic species.
"The effects of warming around Antarctica are regional and uneven. In the future we anticipate that the more southerly colonies should remain, making these important gucci shoes sites for further research and protection.”
2012年3月28日星期三
We need to learn more about the relationship between macrophages
Surgeons from the University of Maryland Medical Center yesterday detailed what they said was the world’s most-comprehensive face transplant — allowing christian louboutin a 37-year-old man to emerge from behind a mask 15 years after a gun accident almost killed him.
Richard Norris, of Hillsville, Va., was shot in the face in 1997 and lost his nose and lips and most movement in his mouth. Since then, he has had lifesaving and reconstructive surgeries, but none could repair him to the extent where he felt he could return to society. He wore a prosthetic nose and a mask even when entering the hospital for the transplant.
But last week, during a 36-hour operation, University of Maryland doctors gave him a new face from an anonymous donor whose organs saved five other patients’ lives on the same day.
Six days after the surgery, he could already move his tongue and open and close his eyes and was recovering much faster than doctors expected.
“He’s actually looking in the mirror shaving and brushing his teeth, which we never even expected,” said Dr. Eduardo Rodriguez, associate professor of surgery at the University of Maryland School of Medicine and head of the transplant team.
When Norris opened his eyes on the third day after the surgery with his family around him, he wanted to see a mirror.
“He put the mirror down and thanked me and hugged me,” Rodriguez said.
The operation follows successful face transplants in Fort Worth, Texas, and Boston last year.
Norris, who still is recovering in the hospital and did not appear at the media event, is the first full face-transplant recipient in the United States to retain his eyesight.
About 100 doctors, scientists and other university medical-staff members teamed up for the operation.
A single antibody caused tumors from seven different human cancers transplanted into mice to shrink or disappear, according to a new study led by Stanford University School of Medicine in the US. The researchers hope to repeat this dramatic finding with tests in humans within the next two years.
Senior author Dr Irving Weissman, professor of pathology at Stanford, and colleagues, write about their success in treating bladder, brain, breast, colon, liver, ovarian, and prostate cancer tumors in this week's online ahead of print issue of the Proceedings of the National Academy of Sciences.
They say the antibody blocks a protein known as CD47, that sends "don't eat me" signals that cancer cells use to stop macrophages and other cells of the immune system from gobbling them up.
Anti-CD47 is the first antibody treatment to work against a variety of human solid tumors. The investigators said they are now eager to get started with phase 1 and phase 2 clinical trials in humans within the next two years.
The treatment also significantly reduced the ability of the tumors to spread (metastasize) to other parts of the mice's bodies, and in some cases, the animals appeared to be "cured".
Weissman, who directs the Institute of Stem Cell Biology and Regenerative Medicine and the Ludwig Center for Cancer Stem Cell Research and Medicine, both at Stanford, told the press their findings show "conclusively" that CD47 is a "a legitimate and promising target for human cancer therapy":
"Blocking this 'don't eat me' signal inhibits the growth in mice of nearly every human cancer we tested, with minimal toxicity," said Weissman.
Dr Robert Weinberg is a professor of biology at the Whitehead Institute for Biomedical Research in Massachusetts and was not involved in the research. He describes the findings as "exciting work" that is bound to cause a worldwide rush to translate these findings into useful therapies.
"Mobilizing the immune system to attack solid tumors has been a longstanding goal of many cancer researchers for decades," said Weinberg.
Weissman's lab had already discovered that CD47 is Christian Louboutin Slingback normally expressed on the surfaces of circulating blood stem cells as a way to stop them being attacked by macrophages, clean-up cells of the immune system that go around looking for rogue cells to eliminate, but sometimes get it wrong.
A CD47 signal prompts the macrophage to release a snared cell.
Weissman and colleagues had also previously discovered that some types of cancer cells, such as those of leukemia and lymphoma, have also found a way to express CD47 on their surfaces to send the "don't eat me" signal and avoid being eaten by macrophages.
They found that by giving mice with human non-Hodgkin's lymphoma an antibody that blocks CD47, together with an agent that boosts the macrophages' killing instinct, cured some of them.
But what they didn't know then was this tactic was also used by many other human cancers, and thus how clinically important this potential treatment might be.
This latest study involved experts from many fields including, oncology, urology, obstetrics and gynecology, radiation oncology, neurosurgery, hematology, pathology, otolaryngology and hepatology. This was to collect samples from a range of human cancers.
The researchers found that nearly every human cancer cell they investigated expressed CD47, on average, about three times as strongly as non-cancerous cells.
They also found that people whose cancer cells express a lot of CD47 tend not to live as long as those with similar cancers but whose cancer cells express less CD47. This feature could be a very useful tool in cancer prognosis.
Once they obtained the human tumor samples, the researchers implanted them in the matching parts of the bodies of prepared lab mice: for instance breast tumors into mammary fat pads, and ovarian tumors into the abdomen.
Two weeks later, once the tumors were well established, they began treating the mice with the antibody that blocks CD47.
The researchers observed that within weeks, most of the tumors began to shrink, and in some cases even disappear.
In the case of five mice transplanted with cells from the same human breast cancer tumor, when the tumors disappeared, the researchers stopped the treatment.
The mice were still cancer-free four months later.
The researchers conclude:
"These results indicate that anti-CD47 antibodies can dramatically inhibit the growth of human solid tumors by blocking the ability of CD47 to transmit the 'don't eat me' signal to macrophages."
Weissman said that if the tumor was highly aggressive, the CD47 antibody also blocked metastasis.
"It's becoming very clear that, in order for a cancer to survive in the body, it has to find some way to evade the cells of the innate immune system," he explained.
The innate immune system is the first line of defence against invading pathogens like viruses and bacteria. Its response is more generalized that the fine-tuned responses of the adaptive immune system that has antibodies and T cells able to recognize and attack specific molecules.
However, in some cases, the CD47 antibody treatment did not work. A group of mice transplanted with human breast cancer cells from one specific patient showed no response at all.
Weissman said there was still a lot to learn.
"We need to learn more about the relationship between macrophages and tumor cells, and how to draw more macrophages to the tumors," he explained.
Perhaps reducing tumor size with surgery or radiotherapy before the antibody treatment could help, or even use it with another antibody to stimulate the immune cells Christian Louboutin Petal Sandals Violet Blue to kill the cancer cells, he said.
In the meantime, the researchers believe their findings are sufficient to show this single antibody holds promise, and sets the stage for advancing research.
Richard Norris, of Hillsville, Va., was shot in the face in 1997 and lost his nose and lips and most movement in his mouth. Since then, he has had lifesaving and reconstructive surgeries, but none could repair him to the extent where he felt he could return to society. He wore a prosthetic nose and a mask even when entering the hospital for the transplant.
But last week, during a 36-hour operation, University of Maryland doctors gave him a new face from an anonymous donor whose organs saved five other patients’ lives on the same day.
Six days after the surgery, he could already move his tongue and open and close his eyes and was recovering much faster than doctors expected.
“He’s actually looking in the mirror shaving and brushing his teeth, which we never even expected,” said Dr. Eduardo Rodriguez, associate professor of surgery at the University of Maryland School of Medicine and head of the transplant team.
When Norris opened his eyes on the third day after the surgery with his family around him, he wanted to see a mirror.
“He put the mirror down and thanked me and hugged me,” Rodriguez said.
The operation follows successful face transplants in Fort Worth, Texas, and Boston last year.
Norris, who still is recovering in the hospital and did not appear at the media event, is the first full face-transplant recipient in the United States to retain his eyesight.
About 100 doctors, scientists and other university medical-staff members teamed up for the operation.
A single antibody caused tumors from seven different human cancers transplanted into mice to shrink or disappear, according to a new study led by Stanford University School of Medicine in the US. The researchers hope to repeat this dramatic finding with tests in humans within the next two years.
Senior author Dr Irving Weissman, professor of pathology at Stanford, and colleagues, write about their success in treating bladder, brain, breast, colon, liver, ovarian, and prostate cancer tumors in this week's online ahead of print issue of the Proceedings of the National Academy of Sciences.
They say the antibody blocks a protein known as CD47, that sends "don't eat me" signals that cancer cells use to stop macrophages and other cells of the immune system from gobbling them up.
Anti-CD47 is the first antibody treatment to work against a variety of human solid tumors. The investigators said they are now eager to get started with phase 1 and phase 2 clinical trials in humans within the next two years.
The treatment also significantly reduced the ability of the tumors to spread (metastasize) to other parts of the mice's bodies, and in some cases, the animals appeared to be "cured".
Weissman, who directs the Institute of Stem Cell Biology and Regenerative Medicine and the Ludwig Center for Cancer Stem Cell Research and Medicine, both at Stanford, told the press their findings show "conclusively" that CD47 is a "a legitimate and promising target for human cancer therapy":
"Blocking this 'don't eat me' signal inhibits the growth in mice of nearly every human cancer we tested, with minimal toxicity," said Weissman.
Dr Robert Weinberg is a professor of biology at the Whitehead Institute for Biomedical Research in Massachusetts and was not involved in the research. He describes the findings as "exciting work" that is bound to cause a worldwide rush to translate these findings into useful therapies.
"Mobilizing the immune system to attack solid tumors has been a longstanding goal of many cancer researchers for decades," said Weinberg.
Weissman's lab had already discovered that CD47 is Christian Louboutin Slingback normally expressed on the surfaces of circulating blood stem cells as a way to stop them being attacked by macrophages, clean-up cells of the immune system that go around looking for rogue cells to eliminate, but sometimes get it wrong.
A CD47 signal prompts the macrophage to release a snared cell.
Weissman and colleagues had also previously discovered that some types of cancer cells, such as those of leukemia and lymphoma, have also found a way to express CD47 on their surfaces to send the "don't eat me" signal and avoid being eaten by macrophages.
They found that by giving mice with human non-Hodgkin's lymphoma an antibody that blocks CD47, together with an agent that boosts the macrophages' killing instinct, cured some of them.
But what they didn't know then was this tactic was also used by many other human cancers, and thus how clinically important this potential treatment might be.
This latest study involved experts from many fields including, oncology, urology, obstetrics and gynecology, radiation oncology, neurosurgery, hematology, pathology, otolaryngology and hepatology. This was to collect samples from a range of human cancers.
The researchers found that nearly every human cancer cell they investigated expressed CD47, on average, about three times as strongly as non-cancerous cells.
They also found that people whose cancer cells express a lot of CD47 tend not to live as long as those with similar cancers but whose cancer cells express less CD47. This feature could be a very useful tool in cancer prognosis.
Once they obtained the human tumor samples, the researchers implanted them in the matching parts of the bodies of prepared lab mice: for instance breast tumors into mammary fat pads, and ovarian tumors into the abdomen.
Two weeks later, once the tumors were well established, they began treating the mice with the antibody that blocks CD47.
The researchers observed that within weeks, most of the tumors began to shrink, and in some cases even disappear.
In the case of five mice transplanted with cells from the same human breast cancer tumor, when the tumors disappeared, the researchers stopped the treatment.
The mice were still cancer-free four months later.
The researchers conclude:
"These results indicate that anti-CD47 antibodies can dramatically inhibit the growth of human solid tumors by blocking the ability of CD47 to transmit the 'don't eat me' signal to macrophages."
Weissman said that if the tumor was highly aggressive, the CD47 antibody also blocked metastasis.
"It's becoming very clear that, in order for a cancer to survive in the body, it has to find some way to evade the cells of the innate immune system," he explained.
The innate immune system is the first line of defence against invading pathogens like viruses and bacteria. Its response is more generalized that the fine-tuned responses of the adaptive immune system that has antibodies and T cells able to recognize and attack specific molecules.
However, in some cases, the CD47 antibody treatment did not work. A group of mice transplanted with human breast cancer cells from one specific patient showed no response at all.
Weissman said there was still a lot to learn.
"We need to learn more about the relationship between macrophages and tumor cells, and how to draw more macrophages to the tumors," he explained.
Perhaps reducing tumor size with surgery or radiotherapy before the antibody treatment could help, or even use it with another antibody to stimulate the immune cells Christian Louboutin Petal Sandals Violet Blue to kill the cancer cells, he said.
In the meantime, the researchers believe their findings are sufficient to show this single antibody holds promise, and sets the stage for advancing research.
2012年3月26日星期一
Ratterman stressed that all companies have technical glitches
The pending home sales index slipped by 0.5 christian louboutin percent to 96.5 in February from 97.0 the previous month, but it was up 9.2 percent from the year-earlier period.
Economists polled by Reuters had expected signed contracts, which lead existing home sales by a month or two, to advance 1 percent, after a previously reported 2.0 percent rise.
“The spring homebuying season looks bright because of an elevated level of contract offers so far this year,” said Lawrence Yun, NAR chief economist, said we’re seeing the continuation of an uneven but higher sales pattern. “If activity is sustained near present levels, existing-home sales will see their best performance in five years.”
Pending sales were strongest in the Midwest, where they jumped 6.5 percent — a 19 percent increase from February 2011.
The weakest region for sales was in the South, where they fell 3 percent. In the West, pending sales dropped 2.6 percent in February to 99.3, while in the Northeast they were down 0.6 percent.
After botching its debut as a public company last week, BATS Global Markets issued a heartfelt apology Sunday night in a letter to customers.
"Let me get right to the point," said Joe Ratterman, chief executive of BATS, in the letter. "BATS experienced a serious technical failure Friday morning and I want to apologize for not measuring up to the level of excellence that you have come to expect from us."
The technical failure came on the day BATS had hoped to sell its own stock to the public for the first time. BATS, which operates stock exchanges, intended to list the stock Christian Louboutin High Boots on its own trading platform.
But trading in the newly issued BATS stock was halted when the price suddenly plunged almost immediately after it hit the market, triggering a so-called circuit breaker.
The Wall Street multibillion scandal no one is talking about
"On Friday we were under the brightest spotlight imaginable ... opening our own stock on our own exchange for the first time ever," said Ratterman. "It doesn't get much more public than that."
Despite months of preparation and "rigorous" testing, BATS said it experienced a "system problem" that prevented the stock from trading properly.
Ratterman stressed that all companies have technical glitches and that BATS exchanges have run smoothly 99.9% of the time over the last three years.
"It shouldn't have failed, but it did, and the timing couldn't have been worse," said Ratterman.
Ratterman suggested the offering could have been salvaged if the problem had been resolved quickly. But it took over two hours to reopen the market and by then the damage had been done.
"We determined that this was a material Christian Louboutin Jean Paul 120 Wedges Sandals Jade event that had eroded investor confidence and made the timely resumption of fair and orderly trading unlikely," he wrote. "As a result, we pulled the IPO and unwound all auction executions."
BATS is the third-largest exchange operator in the United States after NYSE Euronext (NYX, Fortune 500) and the NASDAQ OMX Group (NDAQ), according to the company's investment prospectus.
Economists polled by Reuters had expected signed contracts, which lead existing home sales by a month or two, to advance 1 percent, after a previously reported 2.0 percent rise.
“The spring homebuying season looks bright because of an elevated level of contract offers so far this year,” said Lawrence Yun, NAR chief economist, said we’re seeing the continuation of an uneven but higher sales pattern. “If activity is sustained near present levels, existing-home sales will see their best performance in five years.”
Pending sales were strongest in the Midwest, where they jumped 6.5 percent — a 19 percent increase from February 2011.
The weakest region for sales was in the South, where they fell 3 percent. In the West, pending sales dropped 2.6 percent in February to 99.3, while in the Northeast they were down 0.6 percent.
After botching its debut as a public company last week, BATS Global Markets issued a heartfelt apology Sunday night in a letter to customers.
"Let me get right to the point," said Joe Ratterman, chief executive of BATS, in the letter. "BATS experienced a serious technical failure Friday morning and I want to apologize for not measuring up to the level of excellence that you have come to expect from us."
The technical failure came on the day BATS had hoped to sell its own stock to the public for the first time. BATS, which operates stock exchanges, intended to list the stock Christian Louboutin High Boots on its own trading platform.
But trading in the newly issued BATS stock was halted when the price suddenly plunged almost immediately after it hit the market, triggering a so-called circuit breaker.
The Wall Street multibillion scandal no one is talking about
"On Friday we were under the brightest spotlight imaginable ... opening our own stock on our own exchange for the first time ever," said Ratterman. "It doesn't get much more public than that."
Despite months of preparation and "rigorous" testing, BATS said it experienced a "system problem" that prevented the stock from trading properly.
Ratterman stressed that all companies have technical glitches and that BATS exchanges have run smoothly 99.9% of the time over the last three years.
"It shouldn't have failed, but it did, and the timing couldn't have been worse," said Ratterman.
Ratterman suggested the offering could have been salvaged if the problem had been resolved quickly. But it took over two hours to reopen the market and by then the damage had been done.
"We determined that this was a material Christian Louboutin Jean Paul 120 Wedges Sandals Jade event that had eroded investor confidence and made the timely resumption of fair and orderly trading unlikely," he wrote. "As a result, we pulled the IPO and unwound all auction executions."
BATS is the third-largest exchange operator in the United States after NYSE Euronext (NYX, Fortune 500) and the NASDAQ OMX Group (NDAQ), according to the company's investment prospectus.
2012年3月24日星期六
Police say five children have been shot
Urging Americans to "do some soul-searching," President Barack Obama injected himself into the emotional debate over the fatal shooting of a teenager in Florida,christian louboutin turning the racially charged case into a personal matter for the nation's first black president.
"If I had a son, he'd look like Trayvon," Obama said Friday at the White House. "I can only imagine what these parents are going through, and when I think about this boy, I think about my own kids."
Obama said the parents of 17-year-old Trayvon Martin, who was shot Feb. 26 in Sanford, Fla., a suburb of Orlando, have a right to expect "that we're going to get to the bottom of exactly what happened."
Trayvon was shot by neighborhood watch volunteer George Zimmerman, who said he was acting in self-defense. Zimmerman's father is white, and his mother is Hispanic. The shooting has stoked debate over race as well as other issues. Obama did not mention Zimmerman in his comments.
Zimmerman's defense attorney, Craig Sonner, said on CNN on Friday that Zimmerman is not racist and the facts will show he acted in self-defense as he told police.
"I really think there are other issues in this case and that it's not an issue of racism," Sonner said.
Trayvon was returning to a friend's home from a convenience store when Zimmerman started following him, telling police dispatchers he looked suspicious. At some point, the two got into a fight and Zimmerman pulled out his gun.
Zimmerman told police Martin attacked him after he had given up chasing the teenager and was returning to his SUV.
Also Friday, former Florida Gov. Jeb Bush said the Stand Your Ground law he signed in 2005 shouldn't protect Zimmerman.
"Stand your ground means stand your ground. It doesn't mean chase after somebody who's turned their back," Bush told reporters at the University of Texas at Arlington.
Civil rights groups have held rallies in Florida, New York and Pennsylvania, saying the shooting was unjustified. Of Sanford's 53,000 residents, 57% are white and 30% are black.
The White House had said earlier in the week Christian Louboutin 2011 that it was "not going to wade into a local law enforcement matter" though offering sympathies to Trayvon's family. But that changed Friday when Obama answered a shouted question following a ceremony on another issue.
Obama cautioned before speaking that he must "be careful so we're not impairing any investigation." But he said he was glad the Justice Department was investigating and that Florida officials had formed a task force.
Trayvon's parents, Tracy Martin and Sybrina Fulton, said in a statement that Obama's words "touched us deeply and made us wonder: If his son looked like Trayvon and wore a hoodie, would he be suspicious, too?"
The Justice Department and FBI have opened a civil rights investigation into Trayvon's death, and a grand jury is considering whether to charge Zimmerman.
More Details:
GOP presidential contenders spoke Friday about the death of Trayvon Martin:
Mitt Romney said there should be a "thorough investigation" and called Trayvon's death "a tragedy." He said an investigation would reassure the public that "justice is carried out with impartiality and integrity."
Rick Santorum said the shooting was "horrible" and that the case is a "chilling example of the horrible decisions made by people in this process." Santorum said any investigation should be left to local and state authorities.
Newt Gingrich called the death "a tragedy" and described the shooter as "a guy who'd found a hobby that's very dangerous." Gingrich said local prosecutors were right to bring the case to a grand jury.
More Details: Detroit rally
A rally in Detroit's Hart Plaza is planned for 6 p.m. Monday to urge justice in the shooting death of Trayvon Martin and draw attention to the increase in violent deaths of children in the city.
Police say five children have been shot, two fatally, in Detroit since the end of January.
A coalition of civil rights groups, labor Christian Louboutin Petal Sandals Black unions and ministers are behind the rally, said Kevin Tolbert of the UAW International.
Tolbert, 38, of Detroit said the coalition started organizing the rally Wednesday and is spreading the word through social media.
"If I had a son, he'd look like Trayvon," Obama said Friday at the White House. "I can only imagine what these parents are going through, and when I think about this boy, I think about my own kids."
Obama said the parents of 17-year-old Trayvon Martin, who was shot Feb. 26 in Sanford, Fla., a suburb of Orlando, have a right to expect "that we're going to get to the bottom of exactly what happened."
Trayvon was shot by neighborhood watch volunteer George Zimmerman, who said he was acting in self-defense. Zimmerman's father is white, and his mother is Hispanic. The shooting has stoked debate over race as well as other issues. Obama did not mention Zimmerman in his comments.
Zimmerman's defense attorney, Craig Sonner, said on CNN on Friday that Zimmerman is not racist and the facts will show he acted in self-defense as he told police.
"I really think there are other issues in this case and that it's not an issue of racism," Sonner said.
Trayvon was returning to a friend's home from a convenience store when Zimmerman started following him, telling police dispatchers he looked suspicious. At some point, the two got into a fight and Zimmerman pulled out his gun.
Zimmerman told police Martin attacked him after he had given up chasing the teenager and was returning to his SUV.
Also Friday, former Florida Gov. Jeb Bush said the Stand Your Ground law he signed in 2005 shouldn't protect Zimmerman.
"Stand your ground means stand your ground. It doesn't mean chase after somebody who's turned their back," Bush told reporters at the University of Texas at Arlington.
Civil rights groups have held rallies in Florida, New York and Pennsylvania, saying the shooting was unjustified. Of Sanford's 53,000 residents, 57% are white and 30% are black.
The White House had said earlier in the week Christian Louboutin 2011 that it was "not going to wade into a local law enforcement matter" though offering sympathies to Trayvon's family. But that changed Friday when Obama answered a shouted question following a ceremony on another issue.
Obama cautioned before speaking that he must "be careful so we're not impairing any investigation." But he said he was glad the Justice Department was investigating and that Florida officials had formed a task force.
Trayvon's parents, Tracy Martin and Sybrina Fulton, said in a statement that Obama's words "touched us deeply and made us wonder: If his son looked like Trayvon and wore a hoodie, would he be suspicious, too?"
The Justice Department and FBI have opened a civil rights investigation into Trayvon's death, and a grand jury is considering whether to charge Zimmerman.
More Details:
GOP presidential contenders spoke Friday about the death of Trayvon Martin:
Mitt Romney said there should be a "thorough investigation" and called Trayvon's death "a tragedy." He said an investigation would reassure the public that "justice is carried out with impartiality and integrity."
Rick Santorum said the shooting was "horrible" and that the case is a "chilling example of the horrible decisions made by people in this process." Santorum said any investigation should be left to local and state authorities.
Newt Gingrich called the death "a tragedy" and described the shooter as "a guy who'd found a hobby that's very dangerous." Gingrich said local prosecutors were right to bring the case to a grand jury.
More Details: Detroit rally
A rally in Detroit's Hart Plaza is planned for 6 p.m. Monday to urge justice in the shooting death of Trayvon Martin and draw attention to the increase in violent deaths of children in the city.
Police say five children have been shot, two fatally, in Detroit since the end of January.
A coalition of civil rights groups, labor Christian Louboutin Petal Sandals Black unions and ministers are behind the rally, said Kevin Tolbert of the UAW International.
Tolbert, 38, of Detroit said the coalition started organizing the rally Wednesday and is spreading the word through social media.
2012年3月14日星期三
The visit will highlight the fundamental importance
After a day of basketball, President Barack Obama and British Prime Minister David Cameron will get down to business Wednesday, the second day of his trip to the United States.
During their meetings, the two leaders are expected to discuss the upcoming NATO and G8 summits, as well as Afghanistan, christian louboutin the Middle East, Iran and the global economy, according to the White House.
They will also have a joint news conference, and lunch and dinner at the White House.
Cameron's trip to the United States is intended to demonstrate that ties between the countries remain as close as ever. On Tuesday, Obama gave a nod to America's heartland in a halftime interview conducted during an NCAA basketball game in Ohio.
He said he wanted to show the British leader a part of America rarely seen by foreign visitors.
"I thought it was going to be wonderful for the prime minister to have a chance not only to see a basketball game for first time, but also to come to the great state of Ohio, because sometimes when we have foreign visitors, they only see the coasts, they go to New York, they go to Washington, they go to Los Angeles, but you know the heartland is what it's all about," Obama said.
Obama's hat tip to Ohio, and his choice of venue, may not be pure coincidence -- Ohio is historically a key swing state in presidential elections.
Cameron and Obama flew together on Air Force One to Dayton, Ohio, to take in an opening game of the NCAA basketball tournament.
Obama, well-known as a basketball fan, was treating Cameron to a little March Madness, and the pair conducted the joint television interview at halftime of the game between Western Kentucky and Mississippi Valley State.
Asked how he thought the teams were playing, Obama replied candidly.
"Both teams are shooting terribly," Obama said. "It may be nerves. These are not teams that normally end up coming to the tournament."
Cameron said he enjoyed watching the basketball game, adding that Obama was explaining the ins-and-outs of the American sport.
"He was giving me some tips," Cameron said. "He's going to help me fill out my bracket."
Cameron's trip to the United States is intended to demonstrate that ties between the countries remain as close as ever.
The White House labeled Cameron's visit an official one, not a state one.
That's because the label of Christian Louboutin High Boots state visit is reserved for heads of state, and Cameron is the head of government. Queen Elizabeth II is the head of state.
However, the White House statement said Cameron would attend a state dinner Wednesday night, the sixth of the Obama administration so far.
"The fact that we are hosting the prime minister in the manner that we are demonstrates the nature of the relationship between our two countries; the fact that it is a special relationship," White House Press Secretary Jay Carney told reporters Tuesday.
Cameron and his wife, Samantha, will leave Washington on Thursday.
"The visit will highlight the fundamental importance of the U.S.-U.K. special relationship and the depth of the friendship between the American people and the people of the United Kingdom, as well as the strong personal bond that has developed between the two leaders and their families," a White House statement said.
In a joint op-ed published Tuesday in The Washington Post, Obama and Cameron emphasized the global benefits of the strong alliance between their nations.
"The alliance between the United States and Great Britain is a partnership of the heart, bound by the history, traditions and values we share," the two leaders wrote. "But what makes our relationship special -- a unique and essential asset -- is that we join hands across so many endeavors. Put simply, we count on each other and the world counts on our alliance."
Troops and citizens of the Christian Louboutin Stretch Platform OTK Boot two countries "have long shown what can be achieved when British and Americans work together, heart and hand, and why this remains an essential relationship -- to our nations and the world," the commentary by Obama and Cameron said.
During their meetings, the two leaders are expected to discuss the upcoming NATO and G8 summits, as well as Afghanistan, christian louboutin the Middle East, Iran and the global economy, according to the White House.
They will also have a joint news conference, and lunch and dinner at the White House.
Cameron's trip to the United States is intended to demonstrate that ties between the countries remain as close as ever. On Tuesday, Obama gave a nod to America's heartland in a halftime interview conducted during an NCAA basketball game in Ohio.
He said he wanted to show the British leader a part of America rarely seen by foreign visitors.
"I thought it was going to be wonderful for the prime minister to have a chance not only to see a basketball game for first time, but also to come to the great state of Ohio, because sometimes when we have foreign visitors, they only see the coasts, they go to New York, they go to Washington, they go to Los Angeles, but you know the heartland is what it's all about," Obama said.
Obama's hat tip to Ohio, and his choice of venue, may not be pure coincidence -- Ohio is historically a key swing state in presidential elections.
Cameron and Obama flew together on Air Force One to Dayton, Ohio, to take in an opening game of the NCAA basketball tournament.
Obama, well-known as a basketball fan, was treating Cameron to a little March Madness, and the pair conducted the joint television interview at halftime of the game between Western Kentucky and Mississippi Valley State.
Asked how he thought the teams were playing, Obama replied candidly.
"Both teams are shooting terribly," Obama said. "It may be nerves. These are not teams that normally end up coming to the tournament."
Cameron said he enjoyed watching the basketball game, adding that Obama was explaining the ins-and-outs of the American sport.
"He was giving me some tips," Cameron said. "He's going to help me fill out my bracket."
Cameron's trip to the United States is intended to demonstrate that ties between the countries remain as close as ever.
The White House labeled Cameron's visit an official one, not a state one.
That's because the label of Christian Louboutin High Boots state visit is reserved for heads of state, and Cameron is the head of government. Queen Elizabeth II is the head of state.
However, the White House statement said Cameron would attend a state dinner Wednesday night, the sixth of the Obama administration so far.
"The fact that we are hosting the prime minister in the manner that we are demonstrates the nature of the relationship between our two countries; the fact that it is a special relationship," White House Press Secretary Jay Carney told reporters Tuesday.
Cameron and his wife, Samantha, will leave Washington on Thursday.
"The visit will highlight the fundamental importance of the U.S.-U.K. special relationship and the depth of the friendship between the American people and the people of the United Kingdom, as well as the strong personal bond that has developed between the two leaders and their families," a White House statement said.
In a joint op-ed published Tuesday in The Washington Post, Obama and Cameron emphasized the global benefits of the strong alliance between their nations.
"The alliance between the United States and Great Britain is a partnership of the heart, bound by the history, traditions and values we share," the two leaders wrote. "But what makes our relationship special -- a unique and essential asset -- is that we join hands across so many endeavors. Put simply, we count on each other and the world counts on our alliance."
Troops and citizens of the Christian Louboutin Stretch Platform OTK Boot two countries "have long shown what can be achieved when British and Americans work together, heart and hand, and why this remains an essential relationship -- to our nations and the world," the commentary by Obama and Cameron said.
2012年3月13日星期二
The soldier was never in the custody of Afghan forces
In a village in the district of Panjwai, in Kandahar province, a young man sits against a tree with his knees to his chest and his head christian louboutin hanging down. When he lifts his head, his eyes are full of tears.
The reason for his sorrow is lying in the back of pickup trucks a few yards away.
In the back of the trucks, a dead toddler with a bloodstained face lies between two dead men. In another truck, a blanket is pulled back to reveal the charred legs and feet of two more bodies. All of them are villagers killed in an attack while they slept in their homes before dawn Sunday.
They are some of the 16 victims of what Afghan officials have said was a rampage by a U.S. soldier from a base in western Kandahar.
Confusion, outrage follow massacre
"One guy came in and pulled a boy from his sleep and he shot him in this doorway. Then they came back inside the room and put a gun in the mouth of one child and stomped on another child," a mother said as she sat in her home.
Another mother was filled with rage and sorrow as she sat in one of the vehicles transporting the dead.
"Four girls and four boys. They are 2-year-olds. Are these Talibs?" she barked.
The Taliban have vowed revenge for the incident, but so far, no violent protests have erupted. Meanwhile, the families in the two villages where the shooting occurred spent the day burying their loved ones.
The western district has been known to be a hotbed of Taliban activity, even considered the birthplace of the Taliban. But the woman said she swears she hadn't seen Taliban fighters in five months.
She said she was one of many who had moved back to the village because people on the nearby military base had said it was safe to return home, and that nobody would bother them.
"This base told us to come back to our villages ... we will not bother you. This is your land, and this is your own village," she said. "But these dogs came and grabbed us."
President Barack Obama and other top U.S. officials have expressed their sorrow and condolences to the families. But that had little meaning in the village, where a local minister said one family lost 11 members Sunday.
"Look at these bodies. They all Christian Louboutin Flats belong to one family," one of the villagers said through tears.
Old and young men alike wept openly, while investigators sifted through the grisly scene picking up shell casings and picking through at least one home where the floors and walls were stained with blood.
Sorrow was soon replaced by anger at American forces. Some of the villagers said there was more than one soldier on the ground when the killings occurred.
But the International Security Assistance Force, the U.S.-led NATO mission in Afghanistan, said that was not the case -- that the killings appear to be the result of a single soldier, who walked away from his outpost and acted alone.
How will slaughter affect the NATO military mission?
There was new information Monday about the soldier accused of the killings. A Department of Defense official told CNN the man, a staff sergeant, was a qualified infantry sniper, trained to hit to kill at about 800 meters. He had spent three tours of duty in Iraq, where he suffered a traumatic brain injury in a 2010 vehicle accident.
After treatment, he was cleared to return to duty and was serving his first tour in Afghanistan.
The massacre has further inflamed tensions between U.S. and Afghan leaders and the people of Afghanistan. Afghan lawmakers have asked for a public trial to be held on Afghan soil, but Pentagon spokesman George Little said the case would be handled by the American military.
"The soldier was never in the custody of Afghan forces and will not face punishment under the Afghan justice system," Little said. "The U.S. military has strong means to address wrongdoing. There is an agreement in place with the government of Afghanistan, so that the investigation -- and when appropriate, prosecution -- will be done through U.S. military channels."
But village tribal leaders said Christian Louboutin Toundra Trimmed Suede Ankle Boots Chestnut their people can't comprehend how a trained professional soldier could have acted alone and done such a thing.
The reason for his sorrow is lying in the back of pickup trucks a few yards away.
In the back of the trucks, a dead toddler with a bloodstained face lies between two dead men. In another truck, a blanket is pulled back to reveal the charred legs and feet of two more bodies. All of them are villagers killed in an attack while they slept in their homes before dawn Sunday.
They are some of the 16 victims of what Afghan officials have said was a rampage by a U.S. soldier from a base in western Kandahar.
Confusion, outrage follow massacre
"One guy came in and pulled a boy from his sleep and he shot him in this doorway. Then they came back inside the room and put a gun in the mouth of one child and stomped on another child," a mother said as she sat in her home.
Another mother was filled with rage and sorrow as she sat in one of the vehicles transporting the dead.
"Four girls and four boys. They are 2-year-olds. Are these Talibs?" she barked.
The Taliban have vowed revenge for the incident, but so far, no violent protests have erupted. Meanwhile, the families in the two villages where the shooting occurred spent the day burying their loved ones.
The western district has been known to be a hotbed of Taliban activity, even considered the birthplace of the Taliban. But the woman said she swears she hadn't seen Taliban fighters in five months.
She said she was one of many who had moved back to the village because people on the nearby military base had said it was safe to return home, and that nobody would bother them.
"This base told us to come back to our villages ... we will not bother you. This is your land, and this is your own village," she said. "But these dogs came and grabbed us."
President Barack Obama and other top U.S. officials have expressed their sorrow and condolences to the families. But that had little meaning in the village, where a local minister said one family lost 11 members Sunday.
"Look at these bodies. They all Christian Louboutin Flats belong to one family," one of the villagers said through tears.
Old and young men alike wept openly, while investigators sifted through the grisly scene picking up shell casings and picking through at least one home where the floors and walls were stained with blood.
Sorrow was soon replaced by anger at American forces. Some of the villagers said there was more than one soldier on the ground when the killings occurred.
But the International Security Assistance Force, the U.S.-led NATO mission in Afghanistan, said that was not the case -- that the killings appear to be the result of a single soldier, who walked away from his outpost and acted alone.
How will slaughter affect the NATO military mission?
There was new information Monday about the soldier accused of the killings. A Department of Defense official told CNN the man, a staff sergeant, was a qualified infantry sniper, trained to hit to kill at about 800 meters. He had spent three tours of duty in Iraq, where he suffered a traumatic brain injury in a 2010 vehicle accident.
After treatment, he was cleared to return to duty and was serving his first tour in Afghanistan.
The massacre has further inflamed tensions between U.S. and Afghan leaders and the people of Afghanistan. Afghan lawmakers have asked for a public trial to be held on Afghan soil, but Pentagon spokesman George Little said the case would be handled by the American military.
"The soldier was never in the custody of Afghan forces and will not face punishment under the Afghan justice system," Little said. "The U.S. military has strong means to address wrongdoing. There is an agreement in place with the government of Afghanistan, so that the investigation -- and when appropriate, prosecution -- will be done through U.S. military channels."
But village tribal leaders said Christian Louboutin Toundra Trimmed Suede Ankle Boots Chestnut their people can't comprehend how a trained professional soldier could have acted alone and done such a thing.
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