To solve these problems, the scientists at Stanford have created an organic film from an indium tin oxide (ITO). Using the unique electronic properties of this organic film, an electrical conducting layer is fabricated from the outer two-thirds of it. The nanocrystals themselves are not indium tin oxide nanocrystals, as would be required to create them. They are, instead, nanocrystals made from a natural intermediate polymer that is called a “vitamin C complex” (VCC). The resulting semiconductor was deposited onto a flexible substrate, such as an amorphous silicon matrix, in the presence of hydrogen peroxide and an electric field, leading to the creation of ultra high performance semiconductors. The work is published online today in Nature. Source : Scilab, et al (2015)

Posted by Ben Kew at 7:54 PM

Anonymous said…

Wow. If it were your best work, I’d bet there’s a good chance you got some more at the University of Utah. Thanks for that. I went to the University of Utah, and I’m very impressed with your work (which is also pretty amazing considering that you went to Harvard University - also not at Stanford University). Thanks to the University of Utah, we have a pretty good quality-of-life standard for academics in a place like Utah, and at Harvard we get one of the most amazing universities in the world. I think that’s probably what we’re aiming for in Silicon Valley. Also, congrats on the Nobel Prize. A Nobel is nice, but a life - at least in your case, with your work on superconductivity was far more important to you, and you are now one of the most famous people in the world. Your new line of work is great - the whole thing has nothing to do with science but is focused on engineering ideas in a way that will probably save humanity, and you’re doing it in a way that people know your name. I look forward to learning more about your work. 5/4/2015 at 8:06 PM

Jayne said…

Thanks for all the hard work. I’d like to see a full lecture about the technique, how it’s done, what’s that like, and how it uses a simple organic substrate to produce a silicon semiconductor. I know it sounds really complicated, but it’s a very nice little technique so it’s hard to screw it up. I’m surprised that your paper doesn’t present an easy to follow demonstration so we can easily measure the “superconductivity”. A superconducting electrode has a positive pole that causes a tiny current for an instant, a negative pole allows only a very small current. It’s the same principle as a high-temperature magnet - when the positive pole comes in contact with a superconductor, the magnetic field on the surface of the superconductor acts like the magnet and it turns the superconductor magnetic by changing the energy of the magnetic field, and that magnetic field changes the electrical resistance of the device. Here’s what it looks Like: That’s a big picture of the copper atoms with their copper surfaces, one of the poles of the superconductor as a positive-negative-polarization voltage source. One could see through the copper to see the electrons, which are very bright even under certain conditions, but I don’t think that’s what they’re showing. Reply Delete

Thank you for the lecture. There isn’t anything in it that takes me off your level in terms of understanding what I’m saying. I’m interested in understanding the basic ideas of superconductivity in the context of technology. You seem knowledgeable about the theoretical basis but seem completely focused on technical details. There is already a lot from your lecture up on this blog that seems to get at some of the problems in my mind. But I’m sure you have read the book I posted and I think it’s a pretty good read as far as broad areas of superconductivity. 3/6/2015 at 11:30 PM

Anonymous said…

Wow. This could be a good opportunity to introduce your background into our conversation. What got you to Harvard? I always heard that Harvard had a great reputation for good teaching. It is really interesting to look into a new direction and get exposed to a topic I didn’t know much about before I went. 3/6/2015 at 11:47 PM

Dr Zebra said…

My previous post (and the one above this one) is very helpful for someone like me who is new to this field. So, thanks for the insight. Do you have any ideas on what you are planning

The space agency released a short animation made from images taken by the spacecraft’s Wide Field Infrared Survey Telescope (WISE) this week showing the asteroid from a distance of almost 20 times lower than it was just last week.

Asteroid 2012 DA14 will fly past Earth in 2016 at 16:01:17 GMT today.

But a few seconds later, when it reaches its closest point to the Earth, just before the Sun, it will pass closer than most telescopes could previously capture in such a short time, even under ideal conditions. At a distance of 20 times shorter than the orbit of the planet Pluto, the asteroid is still a tiny speck on our sky, but by then its light will have travelled a distance of about 6,300 miles (10,000 km) and it will have set back a bit, taking on a somewhat dull-coloured hue.

It will move a further 15-20 yards (4-7 metres) along the comet’s orbit around the Sun in order to catch up to its distance in the sky from Earth and for this the WISE spacecraft will also send out its first-ever video images of the surface.

Once again the images will provide researchers with a great deal of data about the comet. “With an estimated 3.5bn to 6bn tons of material on the surface, most of which will be ice, this is a one off object. That really is fascinating work from a space scientist’s point of view,” said Dr Jim Green, director of Nasa’s Planetary Science Division.

It’s not certain how much of the material on the comet comes from the impact of a comet or a comet remnant. Asteroids and comets that come from within the Solar System break up or disintegrate, depending on the environment of their birth. But some may have been brought back from a distance and then buried in ice during the past few million years as the icy bodies in the Solar System went through the process of reorganising themselves.

(Click to enlarge)

The comet orbits around the Milky Way and has a mean diameter of around 2,800 km , which makes it one of the largest comets in the Solar System. Comet 2I/Borisov was discovered in 1631 and is 1,200 km across in diameter. Comet 2I/Borisov appears to be a large dusty snowball, with many large dust grains in the tail. The team said that the coma (a thick ring around the coma) is about 200 m long and is actually made up of a mixture of ice and dust particles from the comet. The ice and dust would have been frozen out of the coma, so a meteor impact could have broken them loose. What is really startling about this comet is that it is almost entirely unexploited. Some people have predicted large comets orbiting the sun, but our team think that these will never occur. The comet is a fascinating object with a lot of mystery left to solve, but more science are needed before this comet can be put into our catalog as an amateur object.

Image credits: NASA, ESA, S. Tkachenko, M. Zemla (Yale), and the A. Gebhard Team (Yale) Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)

From Wikipedia:

The comet B13/2013 A1-1 was discovered on 18 October 2013 by the German Aerospace Centre’s Very Large Telescope (VLT). The comet’s name translates from Russian ( ), from the Russian word (kamennai). The comet orbits the Sun every 150 years and is believed to be at maximum intensity in the summer hours of July 1 and is at minimum in November. At this time, the comet’s comet 2I/Borisov is 1,200 km in diameter. The orbit and orientation of the comet are unknown at present.

Meanwhile, a report released on 5 September showed that two people from the ruling cleric’s inner circle had been transferred to court in connection with charges that it was linked to a scheme involving smuggling fuel into the country. The Guardian reported that the man, Ali Akbar Velayati, was accused of illegally obtaining a license to import fuel from Iran. Meanwhile, the news site Kumarni Khaleejia reported that the court was planning to hold hearings against 14 other defendants who have allegedly served as intermediaries between the Iranian government and some of the country’s most powerful figures. The report said investigators believed the defendants could have profited from these meetings. They had allegedly received money worth up to $40 million (3 billion rials). A number of the defendants have been named as powerful figures, including former President Mahmoud Ahmadinejad and his Iranian Elite Council, which is comprised of senior generals. The Guardian quoted an official with the Supreme Leader’s office explaining that such defendants hold important posts in the powerful clerical establishment.

Posted by b on February 06, 2010 at 08:36 AM | Permalink

In what is likely a deliberate play to divert attention away from the nuclear issue, Iran has also been accused of holding high-level talks to develop a ballistic missile that is capable of carrying a nuclear warhead. The alleged talks were apparently held when sanctions were lifted after a 6-year ordeal. While some claim these talks do in fact occur, Iran has been accused by the US of not doing enough to ensure that a missile that poses no threat to the Middle East and is being developed for Iran’s ballistic missile program does not fall into the wrong hands. According to Iran analyst Mike Nudelman, a professor of politics at Occidental College, “Iran has to make sure the missiles don’t fall in the wrong hands. Now, in Iran, you don’t know you have something with nuclear capability.” He added that “one of the main goals is to maintain deterrence and not let it fall into the hands of any country that might be willing to use it.”

Posted by b on July 17, 2010 at 08:35 PM | Permalink

As one of the world’s oldest democracies, and host to the annual celebration of the independence of America’s oldest ally, Israel, the world demands that the United States uphold its obligations toward the Jewish state of Israel. The United States has provided Israel with invaluable support in many fields of battle for decades, including military assistance, homeland security, diplomacy and humanitarian relief. But Israel’s security and support system is not as stable as many believe. Terrorist groups such as Hamas and Hezbollah possess weapons of mass destruction and are determined to make use of such weapons. Israel faces threats from all directions. Iran and Syria threaten its northern neighbor, while Israel faces the challenge of responding to the threat of a resurgent Hamas, which controls the Gaza Strip. And Israel is still under attack by a rash of rockets from Syria and Hezbollah that threaten to devastate its population. It must be emphasized that a change of course is inevitable. Israel, like the United States, must be concerned that its foreign policy is increasingly driven by a sense of urgency. The United States must seek to shape the situation before it is too late. As an American who has lived on the planet for two thousand years, I do not hesitate to predict that the United States will seek to support Israel where it cannot do so through other means. America must have a special role to play in strengthening Israel’s security and support structure. America must also be willing to speak truth to a powerful lobby in Washington D.C. as well as the Israeli prime minister in Israel, or the conflict will escalate. I believe that America’s allies must act now. America cannot afford to delay. For the sake of Jerusalem and for the sake of Israel’s national security, we must act swiftly. As the United States does so, it will ensure the security of the State of Israel on Israel’s borders, and of Israel’s own people in Gaza and in the West Bank. This includes allowing Israel’s military to act whenever Israel needs to, and to support the people of Israel in dealing with the current military threat. Israel also needs America to do what is necessary to preserve Israeland America’s vital interests there as well. The United States must be upfront and honest when it speaks directly to Israel’s most effective lobby in Washington. The United States must also speak out when Israel commits a violation of the law or the fundamental principles of international law that its own constitution is written on. Such actions must be opposed regardless of what the government of the day may be saying in public. The time has come for the United States to make its support for Israel clear, unequivocal and clear-cut. As the former Israel ambassador to the United Nations, I often noted that in order for “two-state” peace to be achieved, the United States, Israel, and Palestine must come together to put an end

  1. The biggest obstacle before us is ourselves, not Destiny 2.

I don’t care if Bungie says they’re “looking forward” to Destiny 2 I do. I want this game to succeed. If Bungie wants to make the best Destiny ever and give the community something fresh to play in the 21st century, they’re going to have to do what works, not keep changing things up that are working.

I don’t care if they say they’re “looking forward” to Destiny 2 I do. I want this game to succeed. If Bungie wants to make the best Destiny ever and give the community something fresh to play in the 21st century, they’re going to have to do what works, not keep changing things up that are working. 2. We need to be patient until we get Destiny 2 on track.

This is the biggest thing. Destiny 2 is still in development as much as the rest of our game, so it’s not like we can ask people to check out everything else that’s happening on the studio floor and expect them to get excited about new content and new things we won’t have time to show you next week.

If the last game was great, then Destiny 2 has to be great. It has to be fresh and innovative and exciting. If it’s not, well, Bungie has already earned their reputation of working hard to take their games to a higher level. If you want to take your next project to the next level, you’ve got to do what works. I can’t wait for the next one.

It could come as early as yesterday.

Earlier this week, it was reported that Ford was preparing to pull the plug on operations in its U.S. factories. Last week, the Chicago Tribune quoted a source saying that the company “is considering ‘a full-scale withdrawal of operations from the U.S. in the next week or so” and was in talks with labor.

Today, The Wall Street Journal reported that Ford is considering the following: - Stopping production in the states of Ohio and Michigan, where it has facilities. - Moving all but its top executive positions to Mexico including the chairman and chief executive officer of the plant. - Stating it was considering the elimination of 3,600 union jobs through involuntary layoffs.

While negotiations between the two union groups are still going on, the two sides seem to be agreeing on a few things - the first of which is in regard to what the future holds for UAW locals. It is widely known that Ford’s European Union production facility in Wolfsburg, Germany, was to be cut down in order to create a plant for the UAW region in North America. The union has been requesting that Ford add a new plant for UAW manufacturing in Michigan. According to the Journal, a source close to negotiations between the UAW and Ford, said that neither side will be discussing the fate of the Wolfsburg plant - it won’t even be discussed any further, in part because Ford isn’t interested in increasing production there.

In terms of automaker jobs, it is expected that the agreement between the UAW and Ford is in reference to a UAW job, not any employee. The agreement, as we’ve described all along, is for a number of other UAW jobs, but it is still unclear which ones, if any, remain. It is also unclear when the agreement will officially be signed. It’s being discussed as a tentative agreement, meaning that there are a number of things that could happen in the last hours before the announcement. Perhaps today or tomorrow? Whatever the case might be, it’s important to note that Ford will continue to make all its profits from the UAW - both in North America and in Europe. Any company that decides not to provide any benefits to its workers will be able to lay off workers and take their existing jobs. The Journal article states: “The agreement will eliminate union jobs in the most production-intensive U.S. assembly plants, while leaving plants in Michigan, Minnesota, Wisconsin and Ohio. It also will cover about 200,000 jobs under a global agreement that covers all three U.S. automakers.” The Journal report goes on to quote other sources who have stated that Ford is planning to lay off 1,600 to 1,800 workers at the Wolfsburg factory. It is an indication of the level of unrest that could be facing Ford today. There might be some trouble between Ford and the UAW, but there is no reason to believe that will last long or will go far enough, for now.

In terms of UAW jobs, the Journal article states that “At Ford, about 800 jobs are part of the bargaining unit. But UAW officials who have spoken to The Wall Street Journal said the total number of Ford workers has been downgraded. The UAW made the move because it believed that the plan to replace the 1 million hourly employees with temporary contractors and temporary workers didn’t comply with the contract terms. Now the UAW will have to worry about how to replace those workers, which could be a thorny task.” This “parting of the ways” is a familiar problem - the UAW always seems to be scrambling to find a replacement for the worker. It is very likely that this will be the case at this point.

What’s really interesting about the UAW’s announcement is the number of positions that are to be moved - which will potentially leave around 1,800 local workers unemployed. This is an indication that the UAW is taking drastic measures in regards to layoffs. This is not a decision the entire union is going to take at any point in time - the UAW does not have the authority to start the process of layoff layoffs, but in relation to what is really on the table with Ford, it certainly is a significant step.

We can also see the new UAW plan as nothing more than a move on the part of the GMU to try and make up for what they see as GM’s failure that has led to another round of consolidation. GM is now making billions every year in Europe and North America GM’s profit margins are the highest they’ve ever been. But if you’re GM, you’re not giving a damn that the UAW and the union leadership think its time to end all of this and move on to something new and “better”. Do you sell off the plants and consolidate under one roof to bring in new profits

This is such a steal you should be on the lookout for it in the coming weeks to avoid the dreaded knock-on effect.

The best way to protect your system is in the home network. Not only will you be protected with Firewalls, SIP Transceivers, and VPNs you will also be protected with a better level of connectivity. The only thing you will be lacking is the ability to stream some of your favorite services and even then it will still be a hard sell considering YouTube. Well, you and I are both content junkies and all of us can relate to this frustration in terms of content availability for our friends back door.

So lets start with our basic equipment and how everything should be installed in the home. This is the sort of thing that you can get for free with most of the major brands of routers out there so in this review I will be focusing on the cheapest routers in the market.

First, we need to download and install the free and most popular DD-WRT software, which can be found here. I will be using DD-WRT as this is the product of my experience as a DIYer, and it has been a godsend as far as my personal installations go. Since I am about to be taking on a new setup this needs to be set up by myself, so I will be using the free version and its guides.

Once DD-WRT is installed on each of the four routers, you are presented by a desktop interface where you can install and configure all of your routers. This time around the routers are the Linksys WRT54GL, Linksys WRT54GL/G, and Linksys WRT54GL/G/G Pro, and all in either 64 or 128 GB builds. Using any of them will give you good ranges and speeds depending on which ones you choose.

After I complete the basic installation and setup, you will get a notification that you have selected a secure location to run the firmware. This location is going to be your home network router. To do that you will need to go to your web browser and type in the following password (remember it after you enter it, because it cannot be changed after): “admin”

Once you enter this password you will see the instructions flash on the screen for you in a new tab. This is going to be the first step where you will configure your network. On the interface you just just downloaded this step will be a new tab called “Customize.” This is where you are going to select the routing settings and the other parameters you want your system to have so that your router is configured correctly for your local network.

Once you have your configuration screen finished, you can click on the “Apply” button to set the router up and have it running.

All in all this setup is pretty easy, the only aspect not as easy is the time it takes to do this, you will be able to get up and running in a few minutes of tinkering. With that being said if you have a little more time to spare for your next project, this would be an incredibly quick and easy DIY project. I would recommend attempting the installation if you have the time, and you also find the DD-WRT guide extremely helpful in setting up your network and router. For more information on our first trip into the DIY game, you can check out the previous post and our follow-ups on our experiences:

If you have any questions on this setup or have anything to add to this, please feel free to comment below!

(Update: Two deaths have been attributed to the outbreak. It was confirmed by the city of Fort Myers and the county of Broward and is the county with the most virus.) Flu vaccines are available from local health departments and are available at many pharmacies. For more information visit the CDC website.

In Miami-Dade County, where about one-third of the population is Hispanic, there have been three cases reported: from Dec. 22-25. The first one was a male victim. On Dec. 30, another case was reported to Miami-Dade County. On Jan. 3, a third county resident reported flu symptoms. In all cases, the virus was linked to unvaccinated people. The second case, a woman living in Key Biscayne, had the virus in her system when she developed flu symptoms. Her flu symptoms resolved five days later.

The third flu case in Florida was this week. The woman, the mother of one of the children, had a mild influenza-like illness on Dec. 11. She had no symptoms and was discharged from the hospital soon after. The woman was taking an influenza vaccine and had nothing to do with the case, according to state officials.

In Broward County, a woman infected with flu virus contracted it in December and was not vaccinated. She reportedly was still contagious at the time, and the state health officials are now trying to figure out how she contracted the virus.

Another woman whose flu symptoms were tied to an unvaccinated, unvaccinated person was found to have a cold in December. Her antiviral treatment did not prevent the disease. The woman, a Broward County resident, was put on the antiviral drugs again and is well. No viruses are being tested for in the Broward case, but flu vaccination is recommended. In Miami-Dade County, there have been four cases; all were initially identified in people whose flu symptoms persisted for more than a week.

To date, about 90,000 people in two states are under the current influenza season’s vaccine. In addition, at least 5,900 members of the same household or group under the same roof have fallen ill with the virus.

These are only a few of the flu cases in the United States so far in 2014. Flu numbers will continue to grow in 2014, a flu season that is forecast to become far more severe.

“They’re used for people who have been injured during traumatic events. Most doctors or other medical personnel don’t know the purpose of an iron lung.”

We do a bit of research on the world wide web.. It said that the iron lung actually had been invented by the Germans. I didn’t believe it for a second so we googled “German iron lung with a lung.” It said that the patent holder was a German doctor named Werner Humboldt. Humboldt actually did invent the iron lung. He also invented the “breathing machine” which is the first breathing machine that used an iron lung.

So in 1933, we do a bit of research on Humboldt. On the web, another guy calls himself Dr. Manny. We actually find a Dr. Manny. I had heard about the Humboldt name. So in 1945, the man Dr. Manny is on his death bed, he remembers a name. I guess he doesn’t remember the name of his own father. If you have any information on Dr. Manny, please post it in the comment section. I’ll put the information in the post itself.

So Dr. Manny passed away in 1957, in Germany, at the age of 84. Then, in 1960, we visited his office. He had just gotten up from his hospital bed. They left him a little gift, a gift of letters. In a few brief words, he said he’s a nurse now and I am his patient. Thank you! You’ve let me be a nurse!

Another thing, the people who helped us locate the machine were German. So I’ll use some of their stuff, but please read the comments for more information.

Dr. Manny wrote this letter to a man named Victor Deutsches who died of pneumonia just before his 80th birthday. Victor died of pneumonia. A few days later, the doctor, in fact, gave his old patient CPR, when a nurse walked in, and stopped the bleeding. She said, “Hello, there is the person who wants to give you blood.”

Well, it seemed fitting for Deutsches to give Dr. Manny the gift of letters to thank him. The letter was a small gift with two letters attached which Dr. Manny wrote to this little man. It’s a bit hard to translate the English when you don’t speak German. But it’s here. He says the gift is “a small thing that brought me joy in life, to know that it was given to me before I retired and is being used for someone else.” And then he adds, “a little gift to honor you, to show that I’ll always care about you and your wife.”

So here’s the gift. A small thing that brought me joy in life, to know that it was given to me before I retired and is being used for someone else.

Here’s another part of this letter from Dr. Manny. It tells the story of his “discovery” of the iron lung. This time, it’s a little more graphic. Dr. Manny writes, “in 1928, I learned of a curious discovery of iron particles inside the mouth of an American. The man had been trapped inside a machine in 1920 for a year. In 1928, I decided to find out (no words required). I had heard people describing the process several times but I always saw the man crawling around in the machine and didn’t understand how he was alive. After many, many trips, I finally discovered the blood. I went to the doctor and asked him to give me a sample of his blood. I then placed the blood in a machine that would make the iron be brought into the machine.

After about an hour, he awoke. He had no pulse, he was dead. He had been trapped in the machine for twelve years. I asked him if he had found a way out. He said “no”. The only thing I could do then was to try and see if something would happen if I could get the machine started. I started the machine up, waited a few minutes. He seemed to struggle to get up. The machine started up.

A few minutes later, he started to talk. He was telling me about some times he had in the past. He said that he has this amazing machine. He said it was so much better than anything else. “In the past I was a nurse, a young nurse. In the past I had good jobs. I got so good at them that I could do stuff

As I discussed with a colleague ( see my post here ), there is some data to suggest that EVOO has anti-oxidants and anti-carcinogenic effects, but there is more evidence that the olive oil is important for the prevention of Alzheimer’s disease (see here and here ) with similar results as with tau and other protein-related diseases. The tau hypothesis is that it is in addition to high tau levels in the brain that Alzheimer’s disease begins, and that the fatty acids found in olive oil reduce this build-up of tau. It is assumed that the anti-proliferating effects of EVOO are from polyunsaturated fatty acids such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), that are found in higher quantities in the olive oil. There is some evidence to suggest the olive oil may act differently due to its different oil content. The one piece of evidence I’d like to highlightfrom the human brain was an animal study by Wang et al. They found that mice whose brain’s tau was reduced usingEVOO actually gained more neurons. Although more research is needed, the researchers do cite another study, published in the Journal of Alzheimer’s Disease (see: ) that suggests higher eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) levels in olive oil may reduce tau protein levels as well.

The key findings of Wang et al. were as follows:

All three compounds significantly reduced the build-up of the tau protein in neurons compared to the control, so it is a promising lead for the treatment of Alzheimer’s disease as a new approach to prevent the disease. It would be interesting to examine whether the eicosapentaenoic acid and docosapentaenoic acid (DHA) levels could be further lowered and what impact, if any, this would have on the tau protein numbers. Wang et al. state that, when studying mice carrying tau proteins in their brains, using a combination of EVOO and various other treatments, their treatment(EVOO) (1) inhibited the buildup of tau protein, while (2) had no effect on tau levels in the astrocytes or oligodendrocytes.

It is important to note that although their treatments were similar in terms of their activity against tau protein levels, the effects of eicosapentaenoic acid and a supplement called CLA had no effect at all on tau in the brain or other tissues, it is interesting to note that in their experiments the mice were fed a lot of EVOO, but their brains weren’t very saturated. I can’t really draw a conclusion yet, but it seems to me that they could be dealing with either oxidative stress, protein degradation or both, and that their findings are likely related to some of these, but the current results are still preliminary, and I still think it’s really important to look into the mechanisms of action as it relates to Alzheimer’s disease.

As one aspect of their research to date, the authors tested the mice’s behavioral traits as it relates to taming the increased tau, which was pretty hard to test. In one test the participants were given a choice of either a higher tine level (where there was significantly more tau protein accumulation compared to the control). By choosing the higher level the mice were less likely to choose the tine, but they were also less likely to choose to stop when the mouse stopped taking the medication. This is where the idea that the additional levels of EPA and DHA in the EVOO could help attenuate the tangle comes into play.

Another way to investigate the behavioral response is to examine the food intake of the mice, to see if they were eating tau or tine when they were receiving the treatments. And in the past studies that have tested tate levels (e.g. , see the tate link in the table: )) have also found that the mice who eat tate and/or tine (tine is an omega 3 fatty acid linked to neuroinflammation) eat less food but also more fiber. This could partially explain why it was not as beneficial as some individuals would have expected (more on that later) in their study, if they were eating regular diet.

The tate and tine levels were reduced with the treatment, while most of the mice reported that the treatment had no effect

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