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      ["title"]=>
      string(66) "Using internet in retirement boosts cognitive function – NovLink"
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      string(103) "https://travors.com/health-science-news/using-internet-in-retirement-boosts-cognitive-function-novlink/"
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      string(734) "Journal Reference: Colin P. Green, Likun Mao, Vincent O’Sullivan. Internet usage and the cognitive function of retirees. Journal of Economic Behavior & Organization, 2021; 190: 747 DOI: 10.1016/j.jebo.2021.08.013 Researchers from Lancaster University Management School, the Norwegian University Science and Technology and Trinity College Dublin examined the cognitive function of more than 2,000 retired people from ... Read more"
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Journal Reference:

  1. Colin P. Green, Likun Mao, Vincent O’Sullivan. Internet usage and the cognitive function of retirees. Journal of Economic Behavior & Organization, 2021; 190: 747 DOI: 10.1016/j.jebo.2021.08.013

Researchers from Lancaster University Management School, the Norwegian University Science and Technology and Trinity College Dublin examined the cognitive function of more than 2,000 retired people from across Europe, and found that post-retirement internet usage is associated with substantially higher scores on tests.

The study, published in the Journal of Economic Behavior and Organization, uses data drawn from the Survey of Health, Ageing and Retirement in Europe (SHARE) that collects information about the health, employment history and socio-economic status of older people.

Focusing on a sample of 2,105 older people from Austria, Belgium, Denmark, France, Germany, Italy, Israel, Spain, Sweden and Switzerland who have been retired since 2004, researchers examined retirees’ cognitive function in both 2013 and 2015. They specifically focused on a word recall test, where individuals were asked to recall a list of 10 words immediately, and then again five minutes later.

Results found that, on average, people who used the internet after they retired were able to recall 1.22 extra words in the recall test compared to non-internet users. However, retirees who used the internet were also more likely to be male, younger, better educated, and have been retired for a shorter period. They also appear to be in better health — even though they drink and smoke more.

Dr Vincent O’Sullivan, a co-author from Lancaster University Management School said: “Our results reveal that using the internet, post-retirement, leads to a marked reduction in the rate of cognitive decline.

“Interestingly, this protective effect was found to be most significant amongst women, with female retirees who regularly surfed the internet able to recall 2.37 more words compared to women who didn’t go online. The results were also consistent among men, with retired internet users able to recall 0.94 more words than men with similar characteristics who didn’t use the internet.

“We also found that retirees who used computers in their jobs before retirement were more likely to keep using computers once they retired, and hence had better cognitive function.”

Researchers compared the cognitive function of retirees who used to work in jobs where computers were commonplace to retirees who worked in jobs where computers weren’t often used. For example, among teachers, computers became common in the workplace much later than sectors such as financial services. Their results revealed that people with pre-retirement exposure to computers were more likely to continue to use them once they retired.

Among the overall results, the researchers also found a stark difference in the patterns of internet usage between European countries, with no more than 12% of retirees using the internet in Italy, compared to over 60% in Denmark.

“Research has shown that retirement from the workforce is a critical period for cognitive function, which declines with age and can be a predictor for a range of key health outcomes among older people,” said co-author Likun Mao, formerly a PhD student at Lancaster but now at Trinity College Dublin. “Although there is a widespread belief that computer usage improves older people’s cognitive function — such as memory, attention, spatial abilities and problem solving — there has been mixed evidence from previous studies.

“We were able to discern that pre-retirement computer usage does not directly influence post-retirement cognitive decline, and we ensured our results referred only to post-retirement internet usage.”

Professor Colin Green, of the Norwegian University Science and Technology, added: “Within our study we estimated statistical models which controlled for individuals’ ages, education levels, occupational skills and years since retirement, so we are confident that our results are robust and relate only to the use of the internet, post retirement.

“This sets it apart from other studies and raises the interesting question of what it is about internet use exactly, that drives this positive effect on cognitive function. Interacting with others online, finding out information in order to attend social activities or simple tasks like shopping online can all make life easier for retirees, but we are yet to understand which, if any, of these tasks actually go as far as improving cognitive performance.”

Using internet in retirement boosts cognitive function

" } ["summary"]=> string(734) "Journal Reference: Colin P. Green, Likun Mao, Vincent O’Sullivan. Internet usage and the cognitive function of retirees. Journal of Economic Behavior & Organization, 2021; 190: 747 DOI: 10.1016/j.jebo.2021.08.013 Researchers from Lancaster University Management School, the Norwegian University Science and Technology and Trinity College Dublin examined the cognitive function of more than 2,000 retired people from ... Read more" ["atom_content"]=> string(5758) "

Journal Reference:

  1. Colin P. Green, Likun Mao, Vincent O’Sullivan. Internet usage and the cognitive function of retirees. Journal of Economic Behavior & Organization, 2021; 190: 747 DOI: 10.1016/j.jebo.2021.08.013

Researchers from Lancaster University Management School, the Norwegian University Science and Technology and Trinity College Dublin examined the cognitive function of more than 2,000 retired people from across Europe, and found that post-retirement internet usage is associated with substantially higher scores on tests.

The study, published in the Journal of Economic Behavior and Organization, uses data drawn from the Survey of Health, Ageing and Retirement in Europe (SHARE) that collects information about the health, employment history and socio-economic status of older people.

Focusing on a sample of 2,105 older people from Austria, Belgium, Denmark, France, Germany, Italy, Israel, Spain, Sweden and Switzerland who have been retired since 2004, researchers examined retirees’ cognitive function in both 2013 and 2015. They specifically focused on a word recall test, where individuals were asked to recall a list of 10 words immediately, and then again five minutes later.

Results found that, on average, people who used the internet after they retired were able to recall 1.22 extra words in the recall test compared to non-internet users. However, retirees who used the internet were also more likely to be male, younger, better educated, and have been retired for a shorter period. They also appear to be in better health — even though they drink and smoke more.

Dr Vincent O’Sullivan, a co-author from Lancaster University Management School said: “Our results reveal that using the internet, post-retirement, leads to a marked reduction in the rate of cognitive decline.

“Interestingly, this protective effect was found to be most significant amongst women, with female retirees who regularly surfed the internet able to recall 2.37 more words compared to women who didn’t go online. The results were also consistent among men, with retired internet users able to recall 0.94 more words than men with similar characteristics who didn’t use the internet.

“We also found that retirees who used computers in their jobs before retirement were more likely to keep using computers once they retired, and hence had better cognitive function.”

Researchers compared the cognitive function of retirees who used to work in jobs where computers were commonplace to retirees who worked in jobs where computers weren’t often used. For example, among teachers, computers became common in the workplace much later than sectors such as financial services. Their results revealed that people with pre-retirement exposure to computers were more likely to continue to use them once they retired.

Among the overall results, the researchers also found a stark difference in the patterns of internet usage between European countries, with no more than 12% of retirees using the internet in Italy, compared to over 60% in Denmark.

“Research has shown that retirement from the workforce is a critical period for cognitive function, which declines with age and can be a predictor for a range of key health outcomes among older people,” said co-author Likun Mao, formerly a PhD student at Lancaster but now at Trinity College Dublin. “Although there is a widespread belief that computer usage improves older people’s cognitive function — such as memory, attention, spatial abilities and problem solving — there has been mixed evidence from previous studies.

“We were able to discern that pre-retirement computer usage does not directly influence post-retirement cognitive decline, and we ensured our results referred only to post-retirement internet usage.”

Professor Colin Green, of the Norwegian University Science and Technology, added: “Within our study we estimated statistical models which controlled for individuals’ ages, education levels, occupational skills and years since retirement, so we are confident that our results are robust and relate only to the use of the internet, post retirement.

“This sets it apart from other studies and raises the interesting question of what it is about internet use exactly, that drives this positive effect on cognitive function. Interacting with others online, finding out information in order to attend social activities or simple tasks like shopping online can all make life easier for retirees, but we are yet to understand which, if any, of these tasks actually go as far as improving cognitive performance.”

Using internet in retirement boosts cognitive function

" ["date_timestamp"]=> int(1634774644) } [1]=> array(11) { ["title"]=> string(109) "‘Bolillo’ Gómez in his presentation with Honduras: ‘The tie is for men who want to succeed’ – Diez" ["link"]=> string(117) "https://travors.com/news/bolillo-gomez-in-his-presentation-with-honduras-the-tie-is-for-men-who-want-to-succeed-diez/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Thu, 21 Oct 2021 00:00:35 +0000" ["category"]=> string(4) "News" ["guid"]=> string(117) "https://travors.com/news/bolillo-gomez-in-his-presentation-with-honduras-the-tie-is-for-men-who-want-to-succeed-diez/" ["description"]=> string(803) "Follow @kelvincoelloHN With his face in good humor, pulling some jokes on the footballers, the Colombian coach, Hernán “Bolillo” Gómez, was introduced as the new coach of Honduras. The South American left many pearls in his first speech: he does not promise miracles, he wants committed players and above all, there is human material to ... Read more" ["content"]=> array(1) { ["encoded"]=> string(10289) "


With his face in good humor, pulling some jokes on the footballers, the Colombian coach, Hernán “Bolillo” Gómez, was introduced as the new coach of Honduras. The South American left many pearls in his first speech: he does not promise miracles, he wants committed players and above all, there is human material to move this ship forward.

Gómez was nervous when he saw more than 50 journalists who filled the room to cover his presentation: “I never saw the Honduras national team in this position, but we will fight to get it out. With values ​​and union we can achieve it. This scenario looks like a before and after a World Cup match. When I saw all this (group of journalists) I was scared and when I get nervous it is because I have all five senses well. Thank you very much for the welcome “, he commented.

Watch. THIS WERE THE FIRST HOURS OF BOLILLO GÓMEZ IN HONDURAS

“Bolillo” did not want to sell smoke, he was always direct and announced that the situation is complicated for Honduras: “We are going to fight it, it is very difficult. I am here because of the desire to return to a sixth world championship. I am one of objectives and they have given me the opportunity to return and that is a goal and this Selection can take me “.

“I am here because I have always had confidence in the Honduras national team. Whenever I faced her and saw her play, I saw that she was a team with character, self-love and a sense of belonging. The margin is quite small, but if you have a six-game losing streak, you can have eight wins, “says El Bolillo.

DIRECT MESSAGE TO THE PLAYERS: “First is that if a player goes to the National Team, he has to stand out in a club, in addition, that he forms a family, that is supportive. That he is not a worker of those who have hours from 8 to 5 and that are 5:00 pm he says , I’m leaving, but if he is one of those who is missing something, he works until 6:00 pm. You have to know how to eat well, dress well, speak well, behave well. If they tell me that it is not football, that is to train people for good Not only in companies, you have to train them as people. You have to be friends, supportive and help yours. If I am Arriaga and I see that Elis is with the ball on one side, we go to him. If you are a good footballer, you know Playing soccer but you’re not a good person, you damage the environment. “

THE POINTS IT PROMISES TO DO: “What a fucking question. The error is minimal. I will tell you one thing: those of us who start from scratch and go to the United States and draw, serve, and you go to Canada or Mexico and draw, it is good. But in the situation we are in Now, if we go to Mexico and we draw, we don’t win a point, we lose two. Let’s wait and see how I do, but I’m scared. “

THE CALL TO THE FOOTBALL PLAYERS: “I have always seen that the Honduran player is handsome (dedicated), he does not give up, so I want to find out quickly why Honduras is in that position in the octagonal. The choice of players is that they get alone. It is much more difficult now. The tie is for men and professionals who want to succeed, for people who want to lead because it is the most difficult thing a coach and a footballer face; more difficult than playing a World Cup. There are people who do not like some players and others who prefer young people ; but the one who is better will play “.

THE HARDEST CHALLENGE IN YOUR CAREER: “It is the most difficult task and I do not want to be … the managers know that I came here, more than economically, because of the challenge, because I believe in the players, in the National Team. It does not mean that I will qualify for Qatar. No I just want to come and sign a contract for three months, I want to fight and then fulfill a goal of being the coach of the world with six world championships. We have to fight and I get nervous, I’m scared I told my advisers like “Pacho” Maturana and Reinaldo Rueda that I am scared (to come to Honduras). The day that I am not scared I stop directing. “

The coach of the Honduras National Team, with a smile after dressing in the H shirt that will now have to sweat. Photos David Romero

NEW PLAYERS: “Every time I am hired, it is to go and solve problems and it is clear to me from experience. The doors of the National Team are open to all players. You don’t kick anyone out, footballers get in and out on their own. They get in by their ability and behavior, because before they are footballers they have to be professionals, and professionals as people “.

FOOTBALL PLAYERS YOU WANT TO SEE: “They are going to see a Honduran national team that is going to run, show solidarity and that the country understands. I don’t want anybody forced, the players who are willing to take the country forward are going to come.”

WHAT HE SAYS TO THE FANS: “Here what we need the most is the people who will go to the stadium. We are going to respect those who will go, regardless of the result, we are all going to give ourselves up for this shirt. Whoever wears this shirt has to surrender and the people will he has to account for energy to exist. If there is not good energy, we will feel it on our backs. We want the National Team to be the reflection of the country. “

KNOWLEDGE OF HONDURAS: “I know, acceptable, I have seen that he has fast players, that he has good defenses, we have a great goalkeeper. I do not say names because many things are said there. I try above many things, as much as I know Panama, to know more to Honduras, that it be a National Team of Honduras that prevails with the style of Honduras regardless of what Panama or Costa Rica has. “

The federation members, José Ernesto Mejía, Javier Atala, Jorge Salomón and Óscar Velásquez, together with coach “Bolillo” Gómez. Photos David Romero

PLAYERS CALLING YOUR ATTENTION: “In Central America, Honduras is the best football played and there are many Colombians here. I don’t know them like the back of my hand the league, I’m not going to tell them lies. I have spoken with Reinaldo Rueda, with” Pisci ” Restrepo, with Colombian technicians who train here and I have been learning about it. The senior teams are not difficult to choose. I go out and make a list of 20, 17 I chose them. I came to meet you, I have to travel to Colombia tomorrow And next week I have to be here to ride in the stadiums, do microcycles for a few days. What do these trainings dictate to you? You can train, no, but you can meet people. I want to see the players head-on. Who doesn’t know Elis and Moya? I want to show myself how I am, see how they live, because one of them lives, plays, although some do not live well. I return Tuesday or Wednesday and I start living here to get into society. “

THE WORK TO BE IMPLEMENTED: “I am very demanding with the order, I like that the 11 defend and that the 11 attack. In these qualifying rounds I saw that the team was not complete due to injuries, but it has what I handle, triangulations. I saw it against Costa Rica and Canada. If we can do that, we can make a strong team. Besides, there is something else, the good technique that I saw in some players. “

LITTLE WORKING TIME: “The team technicians become selectors to find players quickly and quickly inform the knowledge, I handle that. I hope the boys understand me. Professor Coito left an advance job. You saw the game Canada vs Honduras that was worked to win, others did not and the team fell. I think Coito left me the work in advance, we have to score 21 points, the maximum. We are never going to give up, we are going to fight and that helps me, we are going to fight until the end. “

HOW TO LIFT THE GROUP: “As the president says, we are never going to surrender, I never saw a Honduran team delivered, I always watched it fighting until the end. You have to put in more than 200% or 400% to get out of the problem where we are. It is with work where we have to give much more than what we have done “.





Source link

" } ["summary"]=> string(803) "Follow @kelvincoelloHN With his face in good humor, pulling some jokes on the footballers, the Colombian coach, Hernán “Bolillo” Gómez, was introduced as the new coach of Honduras. The South American left many pearls in his first speech: he does not promise miracles, he wants committed players and above all, there is human material to ... Read more" ["atom_content"]=> string(10289) "


With his face in good humor, pulling some jokes on the footballers, the Colombian coach, Hernán “Bolillo” Gómez, was introduced as the new coach of Honduras. The South American left many pearls in his first speech: he does not promise miracles, he wants committed players and above all, there is human material to move this ship forward.

Gómez was nervous when he saw more than 50 journalists who filled the room to cover his presentation: “I never saw the Honduras national team in this position, but we will fight to get it out. With values ​​and union we can achieve it. This scenario looks like a before and after a World Cup match. When I saw all this (group of journalists) I was scared and when I get nervous it is because I have all five senses well. Thank you very much for the welcome “, he commented.

Watch. THIS WERE THE FIRST HOURS OF BOLILLO GÓMEZ IN HONDURAS

“Bolillo” did not want to sell smoke, he was always direct and announced that the situation is complicated for Honduras: “We are going to fight it, it is very difficult. I am here because of the desire to return to a sixth world championship. I am one of objectives and they have given me the opportunity to return and that is a goal and this Selection can take me “.

“I am here because I have always had confidence in the Honduras national team. Whenever I faced her and saw her play, I saw that she was a team with character, self-love and a sense of belonging. The margin is quite small, but if you have a six-game losing streak, you can have eight wins, “says El Bolillo.

DIRECT MESSAGE TO THE PLAYERS: “First is that if a player goes to the National Team, he has to stand out in a club, in addition, that he forms a family, that is supportive. That he is not a worker of those who have hours from 8 to 5 and that are 5:00 pm he says , I’m leaving, but if he is one of those who is missing something, he works until 6:00 pm. You have to know how to eat well, dress well, speak well, behave well. If they tell me that it is not football, that is to train people for good Not only in companies, you have to train them as people. You have to be friends, supportive and help yours. If I am Arriaga and I see that Elis is with the ball on one side, we go to him. If you are a good footballer, you know Playing soccer but you’re not a good person, you damage the environment. “

THE POINTS IT PROMISES TO DO: “What a fucking question. The error is minimal. I will tell you one thing: those of us who start from scratch and go to the United States and draw, serve, and you go to Canada or Mexico and draw, it is good. But in the situation we are in Now, if we go to Mexico and we draw, we don’t win a point, we lose two. Let’s wait and see how I do, but I’m scared. “

THE CALL TO THE FOOTBALL PLAYERS: “I have always seen that the Honduran player is handsome (dedicated), he does not give up, so I want to find out quickly why Honduras is in that position in the octagonal. The choice of players is that they get alone. It is much more difficult now. The tie is for men and professionals who want to succeed, for people who want to lead because it is the most difficult thing a coach and a footballer face; more difficult than playing a World Cup. There are people who do not like some players and others who prefer young people ; but the one who is better will play “.

THE HARDEST CHALLENGE IN YOUR CAREER: “It is the most difficult task and I do not want to be … the managers know that I came here, more than economically, because of the challenge, because I believe in the players, in the National Team. It does not mean that I will qualify for Qatar. No I just want to come and sign a contract for three months, I want to fight and then fulfill a goal of being the coach of the world with six world championships. We have to fight and I get nervous, I’m scared I told my advisers like “Pacho” Maturana and Reinaldo Rueda that I am scared (to come to Honduras). The day that I am not scared I stop directing. “

The coach of the Honduras National Team, with a smile after dressing in the H shirt that will now have to sweat. Photos David Romero

NEW PLAYERS: “Every time I am hired, it is to go and solve problems and it is clear to me from experience. The doors of the National Team are open to all players. You don’t kick anyone out, footballers get in and out on their own. They get in by their ability and behavior, because before they are footballers they have to be professionals, and professionals as people “.

FOOTBALL PLAYERS YOU WANT TO SEE: “They are going to see a Honduran national team that is going to run, show solidarity and that the country understands. I don’t want anybody forced, the players who are willing to take the country forward are going to come.”

WHAT HE SAYS TO THE FANS: “Here what we need the most is the people who will go to the stadium. We are going to respect those who will go, regardless of the result, we are all going to give ourselves up for this shirt. Whoever wears this shirt has to surrender and the people will he has to account for energy to exist. If there is not good energy, we will feel it on our backs. We want the National Team to be the reflection of the country. “

KNOWLEDGE OF HONDURAS: “I know, acceptable, I have seen that he has fast players, that he has good defenses, we have a great goalkeeper. I do not say names because many things are said there. I try above many things, as much as I know Panama, to know more to Honduras, that it be a National Team of Honduras that prevails with the style of Honduras regardless of what Panama or Costa Rica has. “

The federation members, José Ernesto Mejía, Javier Atala, Jorge Salomón and Óscar Velásquez, together with coach “Bolillo” Gómez. Photos David Romero

PLAYERS CALLING YOUR ATTENTION: “In Central America, Honduras is the best football played and there are many Colombians here. I don’t know them like the back of my hand the league, I’m not going to tell them lies. I have spoken with Reinaldo Rueda, with” Pisci ” Restrepo, with Colombian technicians who train here and I have been learning about it. The senior teams are not difficult to choose. I go out and make a list of 20, 17 I chose them. I came to meet you, I have to travel to Colombia tomorrow And next week I have to be here to ride in the stadiums, do microcycles for a few days. What do these trainings dictate to you? You can train, no, but you can meet people. I want to see the players head-on. Who doesn’t know Elis and Moya? I want to show myself how I am, see how they live, because one of them lives, plays, although some do not live well. I return Tuesday or Wednesday and I start living here to get into society. “

THE WORK TO BE IMPLEMENTED: “I am very demanding with the order, I like that the 11 defend and that the 11 attack. In these qualifying rounds I saw that the team was not complete due to injuries, but it has what I handle, triangulations. I saw it against Costa Rica and Canada. If we can do that, we can make a strong team. Besides, there is something else, the good technique that I saw in some players. “

LITTLE WORKING TIME: “The team technicians become selectors to find players quickly and quickly inform the knowledge, I handle that. I hope the boys understand me. Professor Coito left an advance job. You saw the game Canada vs Honduras that was worked to win, others did not and the team fell. I think Coito left me the work in advance, we have to score 21 points, the maximum. We are never going to give up, we are going to fight and that helps me, we are going to fight until the end. “

HOW TO LIFT THE GROUP: “As the president says, we are never going to surrender, I never saw a Honduran team delivered, I always watched it fighting until the end. You have to put in more than 200% or 400% to get out of the problem where we are. It is with work where we have to give much more than what we have done “.





Source link

" ["date_timestamp"]=> int(1634774435) } [2]=> array(11) { ["title"]=> string(82) "Highlights | Chelsea 4-0 Malmo | Champions League 21/22 – J3 | TUDN – TUDN USA" ["link"]=> string(94) "https://travors.com/news/highlights-chelsea-4-0-malmo-champions-league-21-22-j3-tudn-tudn-usa/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 23:17:49 +0000" ["category"]=> string(4) "News" ["guid"]=> string(94) "https://travors.com/news/highlights-chelsea-4-0-malmo-champions-league-21-22-j3-tudn-tudn-usa/" ["description"]=> string(812) "Highlights | Chelsea 4-0 Malmo | Champions League 21/22 – J3 | TUDN  TUDN USA Chelsea, OK; Lukaku y Werner, KO  MARCA.com They were looking for him from the start: Rudiger’s strong lack of Sergio Peña in Chelsea vs. Malmo [VIDEO]  Depor newspaper Bitter-flavored win for Chelsea: concern for two figures  Football net CHAMPIONS | THOMAS TUCHEL: “A lot ... Read more" ["content"]=> array(1) { ["encoded"]=> string(1789) "


  1. Highlights | Chelsea 4-0 Malmo | Champions League 21/22 – J3 | TUDN  TUDN USA
  2. Chelsea, OK; Lukaku y Werner, KO  MARCA.com
  3. They were looking for him from the start: Rudiger’s strong lack of Sergio Peña in Chelsea vs. Malmo [VIDEO]  Depor newspaper
  4. Bitter-flavored win for Chelsea: concern for two figures  Football net
  5. CHAMPIONS | THOMAS TUCHEL: “A lot of teams LOCK us behind and this is HARD” | As Daily  Diario AS
  6. See full coverage on Google News



Source link

" } ["summary"]=> string(812) "Highlights | Chelsea 4-0 Malmo | Champions League 21/22 – J3 | TUDN  TUDN USA Chelsea, OK; Lukaku y Werner, KO  MARCA.com They were looking for him from the start: Rudiger’s strong lack of Sergio Peña in Chelsea vs. Malmo [VIDEO]  Depor newspaper Bitter-flavored win for Chelsea: concern for two figures  Football net CHAMPIONS | THOMAS TUCHEL: “A lot ... Read more" ["atom_content"]=> string(1789) "


  1. Highlights | Chelsea 4-0 Malmo | Champions League 21/22 – J3 | TUDN  TUDN USA
  2. Chelsea, OK; Lukaku y Werner, KO  MARCA.com
  3. They were looking for him from the start: Rudiger’s strong lack of Sergio Peña in Chelsea vs. Malmo [VIDEO]  Depor newspaper
  4. Bitter-flavored win for Chelsea: concern for two figures  Football net
  5. CHAMPIONS | THOMAS TUCHEL: “A lot of teams LOCK us behind and this is HARD” | As Daily  Diario AS
  6. See full coverage on Google News



Source link

" ["date_timestamp"]=> int(1634771869) } [3]=> array(11) { ["title"]=> string(62) "Hit the sleep ‘sweet spot’ to keep brain sharp – NovLink" ["link"]=> string(93) "https://travors.com/health-science-news/hit-the-sleep-sweet-spot-to-keep-brain-sharp-novlink/" ["dc"]=> array(1) { ["creator"]=> string(14) "stephen Henbie" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 23:01:55 +0000" ["category"]=> string(21) "Health & Science News" ["guid"]=> string(93) "https://travors.com/health-science-news/hit-the-sleep-sweet-spot-to-keep-brain-sharp-novlink/" ["description"]=> string(687) "Journal Reference: Brendan P Lucey, Julie Wisch, Anna H Boerwinkle, Eric C Landsness, Cristina D Toedebusch, Jennifer S Mcleland, Omar H Butt, Jason Hassenstab, John C Morris, Beau M Ances, David M Holtzman. Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer’s disease. Brain, 2021 DOI: 10.1093/brain/awab272 Poor sleep and Alzheimer’s disease are ... Read more" ["content"]=> array(1) { ["encoded"]=> string(6363) "

Journal Reference:

  1. Brendan P Lucey, Julie Wisch, Anna H Boerwinkle, Eric C Landsness, Cristina D Toedebusch, Jennifer S Mcleland, Omar H Butt, Jason Hassenstab, John C Morris, Beau M Ances, David M Holtzman. Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer’s disease. Brain, 2021 DOI: 10.1093/brain/awab272

Poor sleep and Alzheimer’s disease are both associated with cognitive decline, and separating out the effects of each has proven challenging. By tracking cognitive function in a large group of older adults over several years and analyzing it against levels of Alzheimer’s-related proteins and measures of brain activity during sleep, the researchers generated crucial data that help untangle the complicated relationship among sleep, Alzheimer’s and cognitive function. The findings could aid efforts to help keep people’s minds sharp as they age.

The findings are published Oct. 20 in the journal Brain.

“It’s been challenging to determine how sleep and different stages of Alzheimer’s disease are related, but that’s what you need to know to start designing interventions,” said first author Brendan Lucey, MD, an associate professor of neurology and director of the Washington University Sleep Medicine Center. “Our study suggests that there is a middle range, or ‘sweet spot,’ for total sleep time where cognitive performance was stable over time. Short and long sleep times were associated with worse cognitive performance, perhaps due to insufficient sleep or poor sleep quality. An unanswered question is if we can intervene to improve sleep, such as increasing sleep time for short sleepers by an hour or so, would that have a positive effect on their cognitive performance so they no longer decline? We need more longitudinal data to answer this question.”

Alzheimer’s is the main cause of cognitive decline in older adults, contributing to about 70% of dementia cases. Poor sleep is a common symptom of the disease and a driving force that can accelerate the disease’s progression. Studies have shown that self-reported short and long sleepers are both more likely to perform poorly on cognitive tests, but such sleep studies typically do not include assessments of Alzheimer’s disease.

To tease apart the separate effects of sleep and Alzheimer’s disease on cognition, Lucey and colleagues turned to volunteers who participate in Alzheimer’s studies through the university’s Charles F. and Joanne Knight Alzheimer Disease Research Center. Such volunteers undergo annual clinical and cognitive assessments, and provide a blood sample to be tested for the high-risk Alzheimer’s genetic variant APOE4. For this study, the participants also provided samples of cerebrospinal fluid to measure levels of Alzheimer’s proteins, and each slept with a tiny electroencephalogram (EEG) monitor strapped to their foreheads for four to six nights to measure brain activity during sleep.

In total, the researchers obtained sleep and Alzheimer’s data on 100 participants whose cognitive function had been monitored for an average of 4 1/2 years. Most (88) had no cognitive impairments, 11 were very mildly impaired, and one had mild cognitive impairment. The average age was 75 at the time of the sleep study.

The researchers found a U-shaped relationship between sleep and cognitive decline. Overall, cognitive scores declined for the groups that slept less than 4.5 or more than 6.5 hours per night — as measured by EEG — while scores stayed stable for those in the middle of the range. EEG tends to yield estimates of sleep time that are about an hour shorter than self-reported sleep time, so the findings correspond to 5.5 to 7.5 hours of self-reported sleep, Lucey said.

The U-shaped relationship held true for measures of specific sleep phases, including rapid-eye movement (REM), or dreaming, sleep; and non-REM sleep. Moreover, the relationship held even after adjusting for factors that can affect both sleep and cognition, such as age, sex, levels of Alzheimer’s proteins, and the presence of APOE4.

“It was particularly interesting to see that not only those with short amounts of sleep but also those with long amounts of sleep had more cognitive decline,” said co-senior author David Holtzman, MD, a professor of neurology. “It suggests that sleep quality may be key, as opposed to simply total sleep.”

Each person’s sleep needs are unique, and people who wake up feeling rested on short or long sleep schedules should not feel compelled to change their habits, Lucey said. But those who are not sleeping well should be aware that sleep problems often can be treated.

“I ask many of my patients, ‘How’s your sleep?’” said co-senior author Beau M. Ances, MD, PhD, the Daniel J. Brennan, MD, Professor of Neurology. Ances treats patients with dementia and other neurodegenerative conditions at Barnes-Jewish Hospital. “Often patients report that they’re not sleeping well. Often once their sleep issues are treated, they may have improvements in cognition. Physicians who are seeing patients with cognitive complaints should ask them about their quality of sleep. This is potentially a modifiable factor.”

Hit the sleep ‘sweet spot’ to keep brain sharp

" } ["summary"]=> string(687) "Journal Reference: Brendan P Lucey, Julie Wisch, Anna H Boerwinkle, Eric C Landsness, Cristina D Toedebusch, Jennifer S Mcleland, Omar H Butt, Jason Hassenstab, John C Morris, Beau M Ances, David M Holtzman. Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer’s disease. Brain, 2021 DOI: 10.1093/brain/awab272 Poor sleep and Alzheimer’s disease are ... Read more" ["atom_content"]=> string(6363) "

Journal Reference:

  1. Brendan P Lucey, Julie Wisch, Anna H Boerwinkle, Eric C Landsness, Cristina D Toedebusch, Jennifer S Mcleland, Omar H Butt, Jason Hassenstab, John C Morris, Beau M Ances, David M Holtzman. Sleep and longitudinal cognitive performance in preclinical and early symptomatic Alzheimer’s disease. Brain, 2021 DOI: 10.1093/brain/awab272

Poor sleep and Alzheimer’s disease are both associated with cognitive decline, and separating out the effects of each has proven challenging. By tracking cognitive function in a large group of older adults over several years and analyzing it against levels of Alzheimer’s-related proteins and measures of brain activity during sleep, the researchers generated crucial data that help untangle the complicated relationship among sleep, Alzheimer’s and cognitive function. The findings could aid efforts to help keep people’s minds sharp as they age.

The findings are published Oct. 20 in the journal Brain.

“It’s been challenging to determine how sleep and different stages of Alzheimer’s disease are related, but that’s what you need to know to start designing interventions,” said first author Brendan Lucey, MD, an associate professor of neurology and director of the Washington University Sleep Medicine Center. “Our study suggests that there is a middle range, or ‘sweet spot,’ for total sleep time where cognitive performance was stable over time. Short and long sleep times were associated with worse cognitive performance, perhaps due to insufficient sleep or poor sleep quality. An unanswered question is if we can intervene to improve sleep, such as increasing sleep time for short sleepers by an hour or so, would that have a positive effect on their cognitive performance so they no longer decline? We need more longitudinal data to answer this question.”

Alzheimer’s is the main cause of cognitive decline in older adults, contributing to about 70% of dementia cases. Poor sleep is a common symptom of the disease and a driving force that can accelerate the disease’s progression. Studies have shown that self-reported short and long sleepers are both more likely to perform poorly on cognitive tests, but such sleep studies typically do not include assessments of Alzheimer’s disease.

To tease apart the separate effects of sleep and Alzheimer’s disease on cognition, Lucey and colleagues turned to volunteers who participate in Alzheimer’s studies through the university’s Charles F. and Joanne Knight Alzheimer Disease Research Center. Such volunteers undergo annual clinical and cognitive assessments, and provide a blood sample to be tested for the high-risk Alzheimer’s genetic variant APOE4. For this study, the participants also provided samples of cerebrospinal fluid to measure levels of Alzheimer’s proteins, and each slept with a tiny electroencephalogram (EEG) monitor strapped to their foreheads for four to six nights to measure brain activity during sleep.

In total, the researchers obtained sleep and Alzheimer’s data on 100 participants whose cognitive function had been monitored for an average of 4 1/2 years. Most (88) had no cognitive impairments, 11 were very mildly impaired, and one had mild cognitive impairment. The average age was 75 at the time of the sleep study.

The researchers found a U-shaped relationship between sleep and cognitive decline. Overall, cognitive scores declined for the groups that slept less than 4.5 or more than 6.5 hours per night — as measured by EEG — while scores stayed stable for those in the middle of the range. EEG tends to yield estimates of sleep time that are about an hour shorter than self-reported sleep time, so the findings correspond to 5.5 to 7.5 hours of self-reported sleep, Lucey said.

The U-shaped relationship held true for measures of specific sleep phases, including rapid-eye movement (REM), or dreaming, sleep; and non-REM sleep. Moreover, the relationship held even after adjusting for factors that can affect both sleep and cognition, such as age, sex, levels of Alzheimer’s proteins, and the presence of APOE4.

“It was particularly interesting to see that not only those with short amounts of sleep but also those with long amounts of sleep had more cognitive decline,” said co-senior author David Holtzman, MD, a professor of neurology. “It suggests that sleep quality may be key, as opposed to simply total sleep.”

Each person’s sleep needs are unique, and people who wake up feeling rested on short or long sleep schedules should not feel compelled to change their habits, Lucey said. But those who are not sleeping well should be aware that sleep problems often can be treated.

“I ask many of my patients, ‘How’s your sleep?’” said co-senior author Beau M. Ances, MD, PhD, the Daniel J. Brennan, MD, Professor of Neurology. Ances treats patients with dementia and other neurodegenerative conditions at Barnes-Jewish Hospital. “Often patients report that they’re not sleeping well. Often once their sleep issues are treated, they may have improvements in cognition. Physicians who are seeing patients with cognitive complaints should ask them about their quality of sleep. This is potentially a modifiable factor.”

Hit the sleep ‘sweet spot’ to keep brain sharp

" ["date_timestamp"]=> int(1634770915) } [4]=> array(11) { ["title"]=> string(69) "Manchester United vs. Atalanta – Match Report – October 20, 2021" ["link"]=> string(84) "https://travors.com/news/manchester-united-vs-atalanta-match-report-october-20-2021/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 22:34:37 +0000" ["category"]=> string(4) "News" ["guid"]=> string(84) "https://travors.com/news/manchester-united-vs-atalanta-match-report-october-20-2021/" ["description"]=> string(651) "(EFE) – Manchester United was against the ropes this Wednesday, when they went to rest losing 0-2 at Old Trafford against Atalanta, but a great resumption, with goals from the English Marcus Rashford and Harry Maguire and the Portuguese Cristiano Ronaldo , with a header in the 81st minute, gave Ole Gunnar Soskjaer’s men a ... Read more" ["content"]=> array(1) { ["encoded"]=> string(3179) "


(EFE) – Manchester United was against the ropes this Wednesday, when they went to rest losing 0-2 at Old Trafford against Atalanta, but a great resumption, with goals from the English Marcus Rashford and Harry Maguire and the Portuguese Cristiano Ronaldo , with a header in the 81st minute, gave Ole Gunnar Soskjaer’s men a pivotal 3-2 win to storm the solo lead in Group F.

It was Cristiano again, helped by his compatriot Bruno Fernandes, who was in charge of rescuing Manchester United. After signing in the last gasp of the appointment with Villarreal the goal of the final 2-1, this Wednesday he appeared ten minutes from the end with a powerful header that earned the lead and punished an Atalanta who savored the idea of ​​prevailing in a stadium legendary after an excellent first half.

After three days, United leads the group with six points, two more than Atalanta and Villarreal, and three more than Young Boys, with whom the Red Devils lost in their debut, despite another target from Cristiano, who has six in eight games since returning to Old Trafford.

Without the French Raphael Varane, injured, nor his compatriot Paul Pogba, separated from the starting eleven by Solskjaer, United paid in the first half the largest organization of Atalanta, who jumped onto the Old Trafford field with clear ideas and a desire to surprise.

United created a large volume of opportunities, but did so with individual plays, in particular thanks to the fantasy of Bruno Fernandes, while Atalanta did so with the strength of the group.

The Bergamo team broke the equality with a great play, in which the Slovenian Josip Ilicic released Davide Zappacosta with a great pass into the hole so that the Italian hung the low center that Pasalic took advantage of to overcome De Gea.

The Spanish goalkeeper could do nothing against Pasalic, and neither against Demiral’s powerful header, completely forgotten by the United defense, in a corner kick that caused Atalanta to 2-0.

United were on the ropes, but Solskjaer’s men managed to increase the level and, despite wasting two excellent opportunities on the brink of halftime, with Rashford and Fred, they sealed a great comeback at the restart, also conditioned by the injury that forced the Atalanta to replace their defensive leader Demiral.

A masterful assist from the outside of Bruno Fernandes’ right leg opened the way for Rashford’s 1-2, seven minutes into the second half, and United completely changed the inertia of the clash.

Scotsman Scott McTominay shook the wood shortly afterwards and Argentine goalkeeper Juan Musso made three huge saves to oppose shots from Cristiano and Bruno Fernandes, but the Bergamo wall would collapse in the final quarter of an hour.

Maguire, when he finished off a cross from Bruno Fernandes, made it 2-2 in the 75th minute and Cristiano, in the 81st minute, scored a header for the final 3-1 after a Luke Shaw cross.



Source link

" } ["summary"]=> string(651) "(EFE) – Manchester United was against the ropes this Wednesday, when they went to rest losing 0-2 at Old Trafford against Atalanta, but a great resumption, with goals from the English Marcus Rashford and Harry Maguire and the Portuguese Cristiano Ronaldo , with a header in the 81st minute, gave Ole Gunnar Soskjaer’s men a ... Read more" ["atom_content"]=> string(3179) "


(EFE) – Manchester United was against the ropes this Wednesday, when they went to rest losing 0-2 at Old Trafford against Atalanta, but a great resumption, with goals from the English Marcus Rashford and Harry Maguire and the Portuguese Cristiano Ronaldo , with a header in the 81st minute, gave Ole Gunnar Soskjaer’s men a pivotal 3-2 win to storm the solo lead in Group F.

It was Cristiano again, helped by his compatriot Bruno Fernandes, who was in charge of rescuing Manchester United. After signing in the last gasp of the appointment with Villarreal the goal of the final 2-1, this Wednesday he appeared ten minutes from the end with a powerful header that earned the lead and punished an Atalanta who savored the idea of ​​prevailing in a stadium legendary after an excellent first half.

After three days, United leads the group with six points, two more than Atalanta and Villarreal, and three more than Young Boys, with whom the Red Devils lost in their debut, despite another target from Cristiano, who has six in eight games since returning to Old Trafford.

Without the French Raphael Varane, injured, nor his compatriot Paul Pogba, separated from the starting eleven by Solskjaer, United paid in the first half the largest organization of Atalanta, who jumped onto the Old Trafford field with clear ideas and a desire to surprise.

United created a large volume of opportunities, but did so with individual plays, in particular thanks to the fantasy of Bruno Fernandes, while Atalanta did so with the strength of the group.

The Bergamo team broke the equality with a great play, in which the Slovenian Josip Ilicic released Davide Zappacosta with a great pass into the hole so that the Italian hung the low center that Pasalic took advantage of to overcome De Gea.

The Spanish goalkeeper could do nothing against Pasalic, and neither against Demiral’s powerful header, completely forgotten by the United defense, in a corner kick that caused Atalanta to 2-0.

United were on the ropes, but Solskjaer’s men managed to increase the level and, despite wasting two excellent opportunities on the brink of halftime, with Rashford and Fred, they sealed a great comeback at the restart, also conditioned by the injury that forced the Atalanta to replace their defensive leader Demiral.

A masterful assist from the outside of Bruno Fernandes’ right leg opened the way for Rashford’s 1-2, seven minutes into the second half, and United completely changed the inertia of the clash.

Scotsman Scott McTominay shook the wood shortly afterwards and Argentine goalkeeper Juan Musso made three huge saves to oppose shots from Cristiano and Bruno Fernandes, but the Bergamo wall would collapse in the final quarter of an hour.

Maguire, when he finished off a cross from Bruno Fernandes, made it 2-2 in the 75th minute and Cristiano, in the 81st minute, scored a header for the final 3-1 after a Luke Shaw cross.



Source link

" ["date_timestamp"]=> int(1634769277) } [5]=> array(11) { ["title"]=> string(72) "Unmasking the magic of superconductivity in twisted graphene – NovLink" ["link"]=> string(109) "https://travors.com/health-science-news/unmasking-the-magic-of-superconductivity-in-twisted-graphene-novlink/" ["dc"]=> array(1) { ["creator"]=> string(14) "stephen Henbie" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 22:00:47 +0000" ["category"]=> string(21) "Health & Science News" ["guid"]=> string(109) "https://travors.com/health-science-news/unmasking-the-magic-of-superconductivity-in-twisted-graphene-novlink/" ["description"]=> string(705) "Journal Reference: Oh, M., Nuckolls, K.P., Wong, D. et al. Evidence for unconventional superconductivity in twisted bilayer graphene. Nature, 2021 DOI: 10.1038/s41586-021-04121-x Ali Yazdani, the Class of 1909 Professor of Physics and Director of the Center for Complex Materials at Princeton University led the research. He and his team have studied many different types of ... Read more" ["content"]=> array(1) { ["encoded"]=> string(8783) "

Journal Reference:

  1. Oh, M., Nuckolls, K.P., Wong, D. et al. Evidence for unconventional superconductivity in twisted bilayer graphene. Nature, 2021 DOI: 10.1038/s41586-021-04121-x

Ali Yazdani, the Class of 1909 Professor of Physics and Director of the Center for Complex Materials at Princeton University led the research. He and his team have studied many different types of superconductors over the years and have recently turned their attention to magic bilayer graphene.

“Some have argued that magic bilayer graphene is actually an ordinary superconductor disguised in an extraordinary material,” said Yazdani, “but when we examined it microscopically it has many of the characteristics of high temperature cuprate superconductors. It is a déjà vu moment.”

Superconductivity is one of nature’s most intriguing phenomena. It is a state in which electrons flow freely without any resistance. Electrons are subatomic particles that carry negative electric charges; they are vital to our way of life because they power our everyday electronics. In normal circumstances, electrons behave erratically, jumping and jostling against each other in a manner that is ultimately inefficient and wastes energy.

But under superconductivity, electrons suddenly pair up and start to flow in unison, like a wave. In this state the electrons not only do not lose energy, but they also display many novel quantum properties. These properties have allowed for a number of practical applications, including magnets for MRIs and particle accelerators as well as in the making of quantum bits that are being used to build quantum computers. Superconductivity was first discovered at extremely low temperatures in elements such as aluminum and niobium. In recent years, it has been found close to room temperatures under extraordinarily high pressure, and also at temperatures just above the boiling point of liquid nitrogen (77 degrees Kelvin) in ceramic compounds.

But not all superconductors are created equal.

Superconductors made of pure elements like aluminum are what researchers call conventional. The superconductive state — where the electrons pair together — is explained by what is called the Bardeen-Cooper-Schrieffer (BCS) theory. This has been the standard description of superconductivity that has been around since the late 1950s. But starting in the late 1980s new superconductors were discovered that did not fit the BCS theory. Most notable among these “unconventional” superconductors are the ceramic copper oxides (called cuprates) that have remained an enigma for the past thirty years.

The original discovery of superconductivity in magic bilayer graphene by Pablo Jarillo-Herrero and his team at the Massachusetts Institute of Technology (MIT) showed that the material starts out first as an insulator but, with small addition of charge carriers, it becomes superconducting. The emergence of superconductivity from an insulator, rather than a metal, is one of the hallmarks of many unconventional superconductors, including most famously the cuprates.

“They suspected that superconductivity could be unconventional, like the cuprates, but they unfortunately did not have any specific experimental measurements of the superconducting state to support this conclusion,” said Myungchul Oh, a postdoctoral research associate and one of the lead co-authors of the paper.

To investigate the superconductive properties of magic bilayer graphene, Oh and his colleagues used a scanning tunneling microscope (STM) to view the infinitesimally small and complex world of electrons. This device relies on a novel phenomenon called “quantum tunneling,” where electrons are funneled between the sharp metallic tip of the microscope and the sample. The microscope uses this tunneling current rather than light to view the world of electrons on the atomic scale.

“STM is a perfect tool for doing these types of experiments,” said Kevin Nuckolls, a graduate student in physics and one of the paper’s lead co-authors. “There are many different measurements that STM can do. It can access physical variables that are typically inaccessible to other [experimental techniques].”

When the team analyzed the data, they noticed two major characteristics, or “signatures,” that stood out, tipping them off that the magic bilayer graphene sample was exhibiting unconventional superconductivity. The first signature was that the paired electrons that superconduct have a finite angular momentum, a behavior analogous to that found in the high-temperature cuprates twenty years ago. When pairs form in a conventional superconductor, they do not have a net angular momentum, in a manner analogous to an electron bound to the hydrogen atom in the hydrogen’s s-orbital.

STM operates by tunneling electrons in and out the sample. In a superconductor, where all the electrons are paired, the current between the sample and the STM tip is only possible when the superconductor’s pairs are broken apart. “It takes energy to break the pair apart, and the energy dependence of this current depends on the nature of the pairing. In magic graphene we found the energy dependence that is expected for finite momentum pairing,” Yazdani said. “This finding strongly constrains the microscopic mechanism of pairing in magic graphene.”

The Princeton team also discovered how magic bilayer graphene behaves when the superconducting state is quenched by increasing the temperature or applying a magnetic field. In conventional superconductors, the material behavior is the same as that of a normal metal when superconductivity is killed — the electrons unpair. However, in unconventional superconductors, the electrons appear to retain some correlation even when not superconducting, a situation that manifests when there is roughly a threshold energy for removing electrons from the sample. Physicists refer to this threshold energy as a “pseudogap,” a behavior found in the non-superconducting state of many unconventional superconductors. Its origin has been a mystery for more than twenty years.

“One possibility is that electrons are still somewhat paired together even though the sample is not superconducting,” said Nuckolls. “Such a pseudogap state is like a failed superconductor.”

The other possibility, noted in the Nature paper, is that some other form of collective electronic state, which is responsible for the pseudogap, must first form before superconductivity can occur.

“Either way, the resemblance of an experimental signature of a peusdogap with the cuprates as well as finite momentum pairing can’t be all a coincidence,” Yazdani said. “These problems look very much related.”

Future research, Oh said, will involve trying to understand what causes electrons to pair in unconventional superconductivity — a phenomenon that continues to vex physicists. BCS theory relies on weak interaction among electrons with their pairing made possible because of their mutual interaction with the underlying vibration of the ions. The pairing of electrons in unconventional superconductors, however, is often much stronger than in simple metals, but its cause — the “glue” that bonds them together — is currently not known.

“I hope our research will help the physics community to better understand the mechanics of unconventional superconductivity,” Oh said. “We further hope that our research will motivate experimental physicists to work together to uncover the nature of this phenomenon.”

Unmasking the magic of superconductivity in twisted graphene

" } ["summary"]=> string(705) "Journal Reference: Oh, M., Nuckolls, K.P., Wong, D. et al. Evidence for unconventional superconductivity in twisted bilayer graphene. Nature, 2021 DOI: 10.1038/s41586-021-04121-x Ali Yazdani, the Class of 1909 Professor of Physics and Director of the Center for Complex Materials at Princeton University led the research. He and his team have studied many different types of ... Read more" ["atom_content"]=> string(8783) "

Journal Reference:

  1. Oh, M., Nuckolls, K.P., Wong, D. et al. Evidence for unconventional superconductivity in twisted bilayer graphene. Nature, 2021 DOI: 10.1038/s41586-021-04121-x

Ali Yazdani, the Class of 1909 Professor of Physics and Director of the Center for Complex Materials at Princeton University led the research. He and his team have studied many different types of superconductors over the years and have recently turned their attention to magic bilayer graphene.

“Some have argued that magic bilayer graphene is actually an ordinary superconductor disguised in an extraordinary material,” said Yazdani, “but when we examined it microscopically it has many of the characteristics of high temperature cuprate superconductors. It is a déjà vu moment.”

Superconductivity is one of nature’s most intriguing phenomena. It is a state in which electrons flow freely without any resistance. Electrons are subatomic particles that carry negative electric charges; they are vital to our way of life because they power our everyday electronics. In normal circumstances, electrons behave erratically, jumping and jostling against each other in a manner that is ultimately inefficient and wastes energy.

But under superconductivity, electrons suddenly pair up and start to flow in unison, like a wave. In this state the electrons not only do not lose energy, but they also display many novel quantum properties. These properties have allowed for a number of practical applications, including magnets for MRIs and particle accelerators as well as in the making of quantum bits that are being used to build quantum computers. Superconductivity was first discovered at extremely low temperatures in elements such as aluminum and niobium. In recent years, it has been found close to room temperatures under extraordinarily high pressure, and also at temperatures just above the boiling point of liquid nitrogen (77 degrees Kelvin) in ceramic compounds.

But not all superconductors are created equal.

Superconductors made of pure elements like aluminum are what researchers call conventional. The superconductive state — where the electrons pair together — is explained by what is called the Bardeen-Cooper-Schrieffer (BCS) theory. This has been the standard description of superconductivity that has been around since the late 1950s. But starting in the late 1980s new superconductors were discovered that did not fit the BCS theory. Most notable among these “unconventional” superconductors are the ceramic copper oxides (called cuprates) that have remained an enigma for the past thirty years.

The original discovery of superconductivity in magic bilayer graphene by Pablo Jarillo-Herrero and his team at the Massachusetts Institute of Technology (MIT) showed that the material starts out first as an insulator but, with small addition of charge carriers, it becomes superconducting. The emergence of superconductivity from an insulator, rather than a metal, is one of the hallmarks of many unconventional superconductors, including most famously the cuprates.

“They suspected that superconductivity could be unconventional, like the cuprates, but they unfortunately did not have any specific experimental measurements of the superconducting state to support this conclusion,” said Myungchul Oh, a postdoctoral research associate and one of the lead co-authors of the paper.

To investigate the superconductive properties of magic bilayer graphene, Oh and his colleagues used a scanning tunneling microscope (STM) to view the infinitesimally small and complex world of electrons. This device relies on a novel phenomenon called “quantum tunneling,” where electrons are funneled between the sharp metallic tip of the microscope and the sample. The microscope uses this tunneling current rather than light to view the world of electrons on the atomic scale.

“STM is a perfect tool for doing these types of experiments,” said Kevin Nuckolls, a graduate student in physics and one of the paper’s lead co-authors. “There are many different measurements that STM can do. It can access physical variables that are typically inaccessible to other [experimental techniques].”

When the team analyzed the data, they noticed two major characteristics, or “signatures,” that stood out, tipping them off that the magic bilayer graphene sample was exhibiting unconventional superconductivity. The first signature was that the paired electrons that superconduct have a finite angular momentum, a behavior analogous to that found in the high-temperature cuprates twenty years ago. When pairs form in a conventional superconductor, they do not have a net angular momentum, in a manner analogous to an electron bound to the hydrogen atom in the hydrogen’s s-orbital.

STM operates by tunneling electrons in and out the sample. In a superconductor, where all the electrons are paired, the current between the sample and the STM tip is only possible when the superconductor’s pairs are broken apart. “It takes energy to break the pair apart, and the energy dependence of this current depends on the nature of the pairing. In magic graphene we found the energy dependence that is expected for finite momentum pairing,” Yazdani said. “This finding strongly constrains the microscopic mechanism of pairing in magic graphene.”

The Princeton team also discovered how magic bilayer graphene behaves when the superconducting state is quenched by increasing the temperature or applying a magnetic field. In conventional superconductors, the material behavior is the same as that of a normal metal when superconductivity is killed — the electrons unpair. However, in unconventional superconductors, the electrons appear to retain some correlation even when not superconducting, a situation that manifests when there is roughly a threshold energy for removing electrons from the sample. Physicists refer to this threshold energy as a “pseudogap,” a behavior found in the non-superconducting state of many unconventional superconductors. Its origin has been a mystery for more than twenty years.

“One possibility is that electrons are still somewhat paired together even though the sample is not superconducting,” said Nuckolls. “Such a pseudogap state is like a failed superconductor.”

The other possibility, noted in the Nature paper, is that some other form of collective electronic state, which is responsible for the pseudogap, must first form before superconductivity can occur.

“Either way, the resemblance of an experimental signature of a peusdogap with the cuprates as well as finite momentum pairing can’t be all a coincidence,” Yazdani said. “These problems look very much related.”

Future research, Oh said, will involve trying to understand what causes electrons to pair in unconventional superconductivity — a phenomenon that continues to vex physicists. BCS theory relies on weak interaction among electrons with their pairing made possible because of their mutual interaction with the underlying vibration of the ions. The pairing of electrons in unconventional superconductors, however, is often much stronger than in simple metals, but its cause — the “glue” that bonds them together — is currently not known.

“I hope our research will help the physics community to better understand the mechanics of unconventional superconductivity,” Oh said. “We further hope that our research will motivate experimental physicists to work together to uncover the nature of this phenomenon.”

Unmasking the magic of superconductivity in twisted graphene

" ["date_timestamp"]=> int(1634767247) } [6]=> array(11) { ["title"]=> string(145) "Human remains found in Florida park where they are looking for Brian Laundrie, Gabby Petito’s missing boyfriend | Univision News United States" ["link"]=> string(164) "https://travors.com/news/human-remains-found-in-florida-park-where-they-are-looking-for-brian-laundrie-gabby-petitos-missing-boyfriend-univision-news-united-states/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 21:51:48 +0000" ["category"]=> string(4) "News" ["guid"]=> string(164) "https://travors.com/news/human-remains-found-in-florida-park-where-they-are-looking-for-brian-laundrie-gabby-petitos-missing-boyfriend-univision-news-united-states/" ["description"]=> string(880) "Laundrie and his 22-year-old girlfriend were traveling and documenting their journey by van across the United States until Petito disappeared in late August. The young man returned in the van alone to his home in Florida on September 1, but refused to cooperate with authorities in trying to find his girlfriend. Then, on the 14th ... Read more" ["content"]=> array(1) { ["encoded"]=> string(596) "


Laundrie and his 22-year-old girlfriend were traveling and documenting their journey by van across the United States until Petito disappeared in late August. The young man returned in the van alone to his home in Florida on September 1, but refused to cooperate with authorities in trying to find his girlfriend. Then, on the 14th of that month, he disappeared.



Source link

" } ["summary"]=> string(880) "Laundrie and his 22-year-old girlfriend were traveling and documenting their journey by van across the United States until Petito disappeared in late August. The young man returned in the van alone to his home in Florida on September 1, but refused to cooperate with authorities in trying to find his girlfriend. Then, on the 14th ... Read more" ["atom_content"]=> string(596) "


Laundrie and his 22-year-old girlfriend were traveling and documenting their journey by van across the United States until Petito disappeared in late August. The young man returned in the van alone to his home in Florida on September 1, but refused to cooperate with authorities in trying to find his girlfriend. Then, on the 14th of that month, he disappeared.



Source link

" ["date_timestamp"]=> int(1634766708) } [7]=> array(11) { ["title"]=> string(108) "LIVE | Presentation of Hernán ‘Bolillo’ Gómez as the new coach of the Honduras National Team – Diez" ["link"]=> string(119) "https://travors.com/news/live-presentation-of-hernan-bolillo-gomez-as-the-new-coach-of-the-honduras-national-team-diez/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 21:08:48 +0000" ["category"]=> string(4) "News" ["guid"]=> string(119) "https://travors.com/news/live-presentation-of-hernan-bolillo-gomez-as-the-new-coach-of-the-honduras-national-team-diez/" ["description"]=> string(798) "LIVE | Presentation of Hernán ‘Bolillo’ Gómez as the new coach of the Honduras National Team – Diez – Diario Deportivo Beginning> Qualifying Qatar 2022 The Colombian coach is signing a contract for the remainder of the tie and depending on his performance, it will be extended for the next process towards the 2026 World ... Read more" ["content"]=> array(1) { ["encoded"]=> string(16618) "



















LIVE | Presentation of Hernán ‘Bolillo’ Gómez as the new coach of the Honduras National Team – Diez – Diario Deportivo




































































The Colombian coach is signing a contract for the remainder of the tie and depending on his performance, it will be extended for the next process towards the 2026 World Cup.




Everything is ready for the presentation of the Colombian coach Hernán 'Bolillo' Gómez in the Honduras National Team.  Photos Carlos Castellanos
Everything is ready for the presentation of the Colombian coach Hernán ‘Bolillo’ Gómez in the Honduras National Team. Photos Carlos Castellanos * /





Source link

" } ["summary"]=> string(798) "LIVE | Presentation of Hernán ‘Bolillo’ Gómez as the new coach of the Honduras National Team – Diez – Diario Deportivo Beginning> Qualifying Qatar 2022 The Colombian coach is signing a contract for the remainder of the tie and depending on his performance, it will be extended for the next process towards the 2026 World ... Read more" ["atom_content"]=> string(16618) "



















LIVE | Presentation of Hernán ‘Bolillo’ Gómez as the new coach of the Honduras National Team – Diez – Diario Deportivo




































































The Colombian coach is signing a contract for the remainder of the tie and depending on his performance, it will be extended for the next process towards the 2026 World Cup.




Everything is ready for the presentation of the Colombian coach Hernán 'Bolillo' Gómez in the Honduras National Team.  Photos Carlos Castellanos
Everything is ready for the presentation of the Colombian coach Hernán ‘Bolillo’ Gómez in the Honduras National Team. Photos Carlos Castellanos * /





Source link

" ["date_timestamp"]=> int(1634764128) } [8]=> array(11) { ["title"]=> string(75) "Small-scale foragers left more than footprints on the landscape – NovLink" ["link"]=> string(112) "https://travors.com/health-science-news/small-scale-foragers-left-more-than-footprints-on-the-landscape-novlink/" ["dc"]=> array(1) { ["creator"]=> string(14) "stephen Henbie" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 20:59:54 +0000" ["category"]=> string(21) "Health & Science News" ["guid"]=> string(112) "https://travors.com/health-science-news/small-scale-foragers-left-more-than-footprints-on-the-landscape-novlink/" ["description"]=> string(731) "Journal Reference: Dylan S. Davis, Kristina Douglass. Remote Sensing Reveals Lasting Legacies of Land-Use by Small-Scale Foraging Communities in the Southwestern Indian Ocean. Frontiers in Ecology and Evolution, 2021; 9 DOI: 10.3389/fevo.2021.689399 “One of the things I’m interested in is exploring the different ways that people leave a footprint on the landscape and understanding how ... Read more" ["content"]=> array(1) { ["encoded"]=> string(4468) "

Journal Reference:

  1. Dylan S. Davis, Kristina Douglass. Remote Sensing Reveals Lasting Legacies of Land-Use by Small-Scale Foraging Communities in the Southwestern Indian Ocean. Frontiers in Ecology and Evolution, 2021; 9 DOI: 10.3389/fevo.2021.689399

“One of the things I’m interested in is exploring the different ways that people leave a footprint on the landscape and understanding how long the traces of that footprint last,” said Dylan S. Davis, graduate student in anthropology, Penn State. “For a small-scale society that doesn’t build structures, how do they impact the landscape, and will that impact last thousands of years?”

Using high-resolution PlanetScope satellite imaging and vegetative indices to show how the landscape co-evolved with humans, and then a random forest algorithm and statistics to quantify the amount that humans changed their surroundings, the researchers were able to identify areas of human alteration. They report their results in Frontiers in Ecology and Evolution.

Archaeologists often looked at agricultural and pastoral societies in the past and catalogued the changes these lifestyles make in the landscape. Permanent or semi-permanent housing, fields and other structures dot the area and, in some places, completely change the natural landscape, but the impact on the landscape of hunter-gatherers is usually confined to temporary living locations and the remains are a few broken pieces of pottery, fire pits or animal bones. The assumption was that these communities did not alter the overall landscape.

In coastal southwestern Madagascar, most archaeological sites for fishing and gathering communities are ephemeral. There are no large buildings, but the record of use for some rock shelters goes back thousands of years. Even though these sites were only occupied part of the year, they were inhabited year after year.

“What we found was that the areas surrounding these sites, that appear to be pristine, are not,” said Davis. “We see a slight shift in the soil’s capacity to absorb water. This is indicated by a shift in spectral reflectiveness seen in the satellite images.”

The study area encompassed 250 to 300 square miles and showed that 17% of that area was changed by humans.

“The landscape changes may be subtle, but they are widespread,” said Davis.

The researchers compared the areas around known archaeological sites to areas without known sites and found a statistical difference between the forests. They found indications that the distribution of plants differed between known sites and uninhabited areas.

“What we don’t know is whether these types of changes in soil chemistry allowed people to occupy the areas in time of drought,” said Kristina Douglass, assistant professor of anthropology and African studies. “Or whether it allowed the ground to retain moisture and grow different plants.”

Douglass notes that animals in this area are drought-adapted so a slight increase in moisture could make a big difference in the animals that occupied the areas around inhabited sites.

According to the researchers, there are long-lasting, landscape-scale effects of settlement, and their work reinforces previous research that found that ancient communities actively modified their ecological surroundings in ways that increased the suitability of previously settled areas.

“We underestimate the impacts that non-agriculture societies have on shaping landscapes. These are subtle, but can be discovered,” said Douglass. “Looking at landscapes across the world, we find that people modified more of the world than we thought before.”

The National Science Foundation, National Geographic Society, Lewis and Clark Fund Grant from the American Philosophical Society, Explorers Club, NASA Space Grant Consortium, Sigma Xi, and Penn State Institute for Computational and Data Sciences supported this work.

https://novlink.co/small-scale-foragers-left-more-than-footprints-on-the-landscape/

" } ["summary"]=> string(731) "Journal Reference: Dylan S. Davis, Kristina Douglass. Remote Sensing Reveals Lasting Legacies of Land-Use by Small-Scale Foraging Communities in the Southwestern Indian Ocean. Frontiers in Ecology and Evolution, 2021; 9 DOI: 10.3389/fevo.2021.689399 “One of the things I’m interested in is exploring the different ways that people leave a footprint on the landscape and understanding how ... Read more" ["atom_content"]=> string(4468) "

Journal Reference:

  1. Dylan S. Davis, Kristina Douglass. Remote Sensing Reveals Lasting Legacies of Land-Use by Small-Scale Foraging Communities in the Southwestern Indian Ocean. Frontiers in Ecology and Evolution, 2021; 9 DOI: 10.3389/fevo.2021.689399

“One of the things I’m interested in is exploring the different ways that people leave a footprint on the landscape and understanding how long the traces of that footprint last,” said Dylan S. Davis, graduate student in anthropology, Penn State. “For a small-scale society that doesn’t build structures, how do they impact the landscape, and will that impact last thousands of years?”

Using high-resolution PlanetScope satellite imaging and vegetative indices to show how the landscape co-evolved with humans, and then a random forest algorithm and statistics to quantify the amount that humans changed their surroundings, the researchers were able to identify areas of human alteration. They report their results in Frontiers in Ecology and Evolution.

Archaeologists often looked at agricultural and pastoral societies in the past and catalogued the changes these lifestyles make in the landscape. Permanent or semi-permanent housing, fields and other structures dot the area and, in some places, completely change the natural landscape, but the impact on the landscape of hunter-gatherers is usually confined to temporary living locations and the remains are a few broken pieces of pottery, fire pits or animal bones. The assumption was that these communities did not alter the overall landscape.

In coastal southwestern Madagascar, most archaeological sites for fishing and gathering communities are ephemeral. There are no large buildings, but the record of use for some rock shelters goes back thousands of years. Even though these sites were only occupied part of the year, they were inhabited year after year.

“What we found was that the areas surrounding these sites, that appear to be pristine, are not,” said Davis. “We see a slight shift in the soil’s capacity to absorb water. This is indicated by a shift in spectral reflectiveness seen in the satellite images.”

The study area encompassed 250 to 300 square miles and showed that 17% of that area was changed by humans.

“The landscape changes may be subtle, but they are widespread,” said Davis.

The researchers compared the areas around known archaeological sites to areas without known sites and found a statistical difference between the forests. They found indications that the distribution of plants differed between known sites and uninhabited areas.

“What we don’t know is whether these types of changes in soil chemistry allowed people to occupy the areas in time of drought,” said Kristina Douglass, assistant professor of anthropology and African studies. “Or whether it allowed the ground to retain moisture and grow different plants.”

Douglass notes that animals in this area are drought-adapted so a slight increase in moisture could make a big difference in the animals that occupied the areas around inhabited sites.

According to the researchers, there are long-lasting, landscape-scale effects of settlement, and their work reinforces previous research that found that ancient communities actively modified their ecological surroundings in ways that increased the suitability of previously settled areas.

“We underestimate the impacts that non-agriculture societies have on shaping landscapes. These are subtle, but can be discovered,” said Douglass. “Looking at landscapes across the world, we find that people modified more of the world than we thought before.”

The National Science Foundation, National Geographic Society, Lewis and Clark Fund Grant from the American Philosophical Society, Explorers Club, NASA Space Grant Consortium, Sigma Xi, and Penn State Institute for Computational and Data Sciences supported this work.

https://novlink.co/small-scale-foragers-left-more-than-footprints-on-the-landscape/

" ["date_timestamp"]=> int(1634763594) } [9]=> array(11) { ["title"]=> string(117) "This is Trump’s friend who wants to build on the ruins of the collapsed building in Surfside – Univision Noticias" ["link"]=> string(136) "https://travors.com/news/this-is-trumps-friend-who-wants-to-build-on-the-ruins-of-the-collapsed-building-in-surfside-univision-noticias/" ["dc"]=> array(1) { ["creator"]=> string(24) "First Name 1 Last Name 1" } ["pubdate"]=> string(31) "Wed, 20 Oct 2021 20:25:29 +0000" ["category"]=> string(4) "News" ["guid"]=> string(136) "https://travors.com/news/this-is-trumps-friend-who-wants-to-build-on-the-ruins-of-the-collapsed-building-in-surfside-univision-noticias/" ["description"]=> string(136) "This is Trump’s friend who wants to build on the ruins of the collapsed building in Surfside  Univision News Source link" ["content"]=> array(1) { ["encoded"]=> string(576) "



This is Trump’s friend who wants to build on the ruins of the collapsed building in Surfside  Univision News



Source link

" } ["summary"]=> string(136) "This is Trump’s friend who wants to build on the ruins of the collapsed building in Surfside  Univision News Source link" ["atom_content"]=> string(576) "



This is Trump’s friend who wants to build on the ruins of the collapsed building in Surfside  Univision News



Source link

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