quarta-feira, 8 de julho de 2015
Connected: The Surprising Power of Our Social Networks and How They Shap...
Publicado em 29 de out de 2014
Professor Nicholas Christakis of Yale University spoke to an audience at Cass about his research into social networks as part of the Dean's Lecture series.
Specifically he tracked how a wide variety of traits – from happiness to obesity – can spread from person to person. For example, through his work on obesity, Professor Christakis demonstrated that:
“If your friends are obese, your risk of obesity is 45% higher… if your friend’s friends are obese, your risk of obesity is 25% higher. It’s only when you get to your friend’s friend’s friend’s friends that there’s no longer a relationship between that person’s body size and your own body size.”
His research is currently being applied to:
• Facilitate the diffusion of public health practices in the developing world. Evidence suggests if 5% of the population are strategically targeted, according to their position within a social network, e.g. a village or a school, you can get the whole group to change its behaviour. These behaviours range from changing the practice of open defection in Indian villages to implementing clean water interventions in Honduras.
• Encourage better co-operation and reduce trolling in online groups
• Reduce bullying in schools, or isolation in nursing homes
• Facilitate the diffusion of innovations within networks of practicing physicians, or within networks of engineers in firms.
In 2009, Professor Christakis was named by Time magazine to its annual list of the 100 most influential people in the world, and also, in 2009 and 2010, by Foreign Policy magazine on its list of 100 top global thinkers.
Specifically he tracked how a wide variety of traits – from happiness to obesity – can spread from person to person. For example, through his work on obesity, Professor Christakis demonstrated that:
“If your friends are obese, your risk of obesity is 45% higher… if your friend’s friends are obese, your risk of obesity is 25% higher. It’s only when you get to your friend’s friend’s friend’s friends that there’s no longer a relationship between that person’s body size and your own body size.”
His research is currently being applied to:
• Facilitate the diffusion of public health practices in the developing world. Evidence suggests if 5% of the population are strategically targeted, according to their position within a social network, e.g. a village or a school, you can get the whole group to change its behaviour. These behaviours range from changing the practice of open defection in Indian villages to implementing clean water interventions in Honduras.
• Encourage better co-operation and reduce trolling in online groups
• Reduce bullying in schools, or isolation in nursing homes
• Facilitate the diffusion of innovations within networks of practicing physicians, or within networks of engineers in firms.
In 2009, Professor Christakis was named by Time magazine to its annual list of the 100 most influential people in the world, and also, in 2009 and 2010, by Foreign Policy magazine on its list of 100 top global thinkers.
Nicholas Christakis: The Sociological Science Behind Social Networks and...
Publicado em 20 de out de 2012
If You're So Free, Why Do You Follow Others? The Sociological Science Behind Social Networks and Social Influence.
Nicholas Christakis, Professor of Medical Sociology, Medicine, and Sociology at Harvard University
If you think you're in complete control of your destiny or even your own actions, you're wrong. Every choice you make, every behavior you exhibit, and even every desire you have finds its roots in the social universe. Nicholas Christakis explains why individual actions are inextricably linked to sociological pressures; whether you're absorbing altruism performed by someone you'll never meet or deciding to jump off the Golden Gate Bridge, collective phenomena affect every aspect of your life. By the end of the lecture Christakis has revealed a startling new way to understand the world that ranks sociology as one of the most vitally important social sciences.
The Floating University
Originally released September 2011.
Additional Lectures:
Michio Kaku: The Universe in a Nutshell
http://www.youtube.com/watch?v=0NbBjN...
Joel Cohen: An Introduction to Demography (Malthus Miffed: Are People the Problem?)
http://www.youtube.com/watch?v=2vr44C...
Steven Pinker: Linguistics as a Window to Understanding the Brain http://www.youtube.com/watch?v=Q-B_ON...
Leon Botstein: Art Now (Aesthetics Across Music, Painting, Architecture, Movies, and More.)
http://www.youtube.com/watch?v=j6F-sH...
Tamar Gendler: An Introduction to the Philosophy of Politics and Economics
http://www.youtube.com/watch?v=mm8asJ...
Nicholas Christakis, Professor of Medical Sociology, Medicine, and Sociology at Harvard University
If you think you're in complete control of your destiny or even your own actions, you're wrong. Every choice you make, every behavior you exhibit, and even every desire you have finds its roots in the social universe. Nicholas Christakis explains why individual actions are inextricably linked to sociological pressures; whether you're absorbing altruism performed by someone you'll never meet or deciding to jump off the Golden Gate Bridge, collective phenomena affect every aspect of your life. By the end of the lecture Christakis has revealed a startling new way to understand the world that ranks sociology as one of the most vitally important social sciences.
The Floating University
Originally released September 2011.
Additional Lectures:
Michio Kaku: The Universe in a Nutshell
http://www.youtube.com/watch?v=0NbBjN...
Joel Cohen: An Introduction to Demography (Malthus Miffed: Are People the Problem?)
http://www.youtube.com/watch?v=2vr44C...
Steven Pinker: Linguistics as a Window to Understanding the Brain http://www.youtube.com/watch?v=Q-B_ON...
Leon Botstein: Art Now (Aesthetics Across Music, Painting, Architecture, Movies, and More.)
http://www.youtube.com/watch?v=j6F-sH...
Tamar Gendler: An Introduction to the Philosophy of Politics and Economics
http://www.youtube.com/watch?v=mm8asJ...
Nicholas Christakis: The hidden influence of social networks
Enviado em 10 de mai de 2010
http://www.ted.com We're all embedded in vast social networks of friends, family, co-workers and more. Nicholas Christakis tracks how a wide variety of traits -- from happiness to obesity -- can spread from person to person, showing how your location in the network might impact your life in ways you don't even know.
TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the "Sixth Sense" wearable tech, and "Lost" producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at http://www.ted.com/translate. Watch a highlight reel of the Top 10 TEDTalks at http://www.ted.com/index.php/talks/top10
TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the "Sixth Sense" wearable tech, and "Lost" producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at http://www.ted.com/translate. Watch a highlight reel of the Top 10 TEDTalks at http://www.ted.com/index.php/talks/top10
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