Do schools kill creativity? | Sir Ken Robinson

Фрагмент с начала видео - Do schools kill creativity? | Sir Ken Robinson

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Sir Ken Robinson makes an entertaining and profoundly moving case for creating an education system that nurtures (rather than undermines) creativity. Get TED Talks recommended just for you! Learn more at . The TED Talks channel features 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 (or less). Look for talks on Technology, Entertainment and Design -- plus science, business, global issues, the arts and more. Follow TED on Twitter: Like TED on Facebook: Subscribe to our channel:



Mortgage-backed securities I | Finance & Capital Markets | Khan Academy

Фрагмент с начала видео - Mortgage-backed securities I | Finance & Capital Markets | Khan Academy

Фрагмент с средины видео - Mortgage-backed securities I | Finance & Capital Markets | Khan Academy

Фрагмент с конца видео - Mortgage-backed securities I | Finance & Capital Markets | Khan Academy

Part I of the introduction to mortgage-backed securities. Created by Sal Khan. Watch the next lesson: Missed the previous lesson? Watch here: Finance and capital markets on Khan Academy: In many commodities markets, it is very helpful for buyers or sellers to lock-in future prices. This is what both forwards and futures allow for. This tutorial explains how they work and what the difference is between the two. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Finance and Capital Markets channel: Subscribe to Khan Academy:



KT Tunstall "YOU'RE A LESBIAN!!" - Graham Norton Show - BBC

Фрагмент с начала видео - KT Tunstall "YOU'RE A LESBIAN!!" - Graham Norton Show - BBC

Фрагмент с средины видео - KT Tunstall "YOU'RE A LESBIAN!!" - Graham Norton Show - BBC

Фрагмент с конца видео - KT Tunstall "YOU'RE A LESBIAN!!" - Graham Norton Show - BBC

Subscribe and 🔔 to OFFICIAL BBC YouTube 👉 Stream original BBC programmes FIRST on BBC iPlayer 👉 KT Tunstall tells Graham Norton about a girl who called out to her at a gig in Dublin. Graham Norton presents a show on the people, trends and stories that interest him most and covers some of the best new films and music albums coming out soon! TheGrahamNortonShow GrahamNorton All our TV channels and S4C are available to watch live through BBC iPlayer, although some programmes may not be available to stream online due to rights. If you would like to read more on what types of programmes are available to watch live, check the 'Are all programmes that are broadcast available on BBC iPlayer?' FAQ 👉 .



Introduction to Logarithms

Фрагмент с начала видео - Introduction to Logarithms

Фрагмент с средины видео - Introduction to Logarithms

Фрагмент с конца видео - Introduction to Logarithms

An introduction to logarithms About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit , join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.



Basic Trigonometry

Фрагмент с начала видео - Basic Trigonometry

Фрагмент с средины видео - Basic Trigonometry

Фрагмент с конца видео - Basic Trigonometry

An introduction to trigonometric functions: sine, cosine, and tangent. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit , join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything.



Calculus: Derivatives 1 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с начала видео - Calculus: Derivatives 1 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с средины видео - Calculus: Derivatives 1 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с конца видео - Calculus: Derivatives 1 | Taking derivatives | Differential Calculus | Khan Academy

Finding the slope of a tangent line to a curve (the derivative). Introduction to Calculus. Watch the next lesson: Missed the previous lesson? Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits. About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit , join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Differential Calculus channel: Subscribe to KhanAcademy:



The Chain Rule

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Фрагмент с конца видео - The Chain Rule

Part 4 of derivatives. Introduction to the chain rule. Practice this yourself on Khan Academy right now:



Introduction to logarithm properties | Logarithms | Algebra II | Khan Academy

Фрагмент с начала видео - Introduction to logarithm properties | Logarithms | Algebra II | Khan Academy

Фрагмент с средины видео - Introduction to logarithm properties | Logarithms | Algebra II | Khan Academy

Фрагмент с конца видео - Introduction to logarithm properties | Logarithms | Algebra II | Khan Academy

Introduction to the first two logarithm properties. Practice this yourself on Khan Academy right now: Watch the next lesson: Missed the previous lesson? Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions.but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Algebra II channel: Subscribe to Khan Academy:



Introduction to functions

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Фрагмент с конца видео - Introduction to functions

An introduction to functions. More free lessons at:



Derivatives (part 9)

Фрагмент с начала видео - Derivatives (part 9)

Фрагмент с средины видео - Derivatives (part 9)

Фрагмент с конца видео - Derivatives (part 9)

More examples of taking derivatives



Indefinite Integration (part IV)

Фрагмент с начала видео - Indefinite Integration (part IV)

Фрагмент с средины видео - Indefinite Integration (part IV)

Фрагмент с конца видео - Indefinite Integration (part IV)

Integration by substitution (or the reverse-chain-rule)



Indefinite Integration (part V)

Фрагмент с начала видео - Indefinite Integration (part V)

Фрагмент с средины видео - Indefinite Integration (part V)

Фрагмент с конца видео - Indefinite Integration (part V)

Introduction to Integration by Parts (kind of the reverse-product rule)



Bob Thurman: We can be Buddhas

Фрагмент с начала видео - Bob Thurman: We can be Buddhas

Фрагмент с средины видео - Bob Thurman: We can be Buddhas

Фрагмент с конца видео - Bob Thurman: We can be Buddhas

In our hyperlinked world, we can know anything, anytime. And this mass enlightenment, says Buddhist scholar Bob Thurman, is our first step toward Buddha nature. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers are invited to give the talk of their lives in 18 minutes -- including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosling, Al Gore and Arthur Benjamin. TED stands for Technology, Entertainment, and Design, and TEDTalks cover these topics as well as science, business, politics and the arts. Watch the Top 10 TEDTalks on TED.com, at



Product rule | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с начала видео - Product rule | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с средины видео - Product rule | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с конца видео - Product rule | Taking derivatives | Differential Calculus | Khan Academy

Watch the next lesson: Missed the previous lesson? Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Differential Calculus channel: Subscribe to KhanAcademy:



Power rule introduction (old) | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с начала видео - Power rule introduction (old) | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с средины видео - Power rule introduction (old) | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с конца видео - Power rule introduction (old) | Taking derivatives | Differential Calculus | Khan Academy

Determining the derivatives of simple polynomials. Watch the next lesson: Missed the previous lesson? Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Differential Calculus channel: Subscribe to KhanAcademy:



Chain Rule Examples

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Examples using the Chain Rule Practice this yourself on Khan Academy right now:



Indefinite integrals (part II)

Фрагмент с начала видео - Indefinite integrals (part II)

Фрагмент с средины видео - Indefinite integrals (part II)

Фрагмент с конца видео - Indefinite integrals (part II)

Examples of taking the indefinite integral (or anti-derivative) of polynomials. Practice this yourself on Khan Academy right now:



The Indefinite Integral or Anti-derivative

Фрагмент с начала видео - The Indefinite Integral or Anti-derivative

Фрагмент с средины видео - The Indefinite Integral or Anti-derivative

Фрагмент с конца видео - The Indefinite Integral or Anti-derivative

An introduction to indefinite integration of polynomials.



Mortgage-backed securities II | Finance & Capital Markets | Khan Academy

Фрагмент с начала видео - Mortgage-backed securities II | Finance & Capital Markets | Khan Academy

Фрагмент с средины видео - Mortgage-backed securities II | Finance & Capital Markets | Khan Academy

Фрагмент с конца видео - Mortgage-backed securities II | Finance & Capital Markets | Khan Academy

Part II of the introduction to mortgage-backed securities. Created by Sal Khan. Watch the next lesson: Missed the previous lesson? Watch here: Finance and capital markets on Khan Academy: In many commodities markets, it is very helpful for buyers or sellers to lock-in future prices. This is what both forwards and futures allow for. This tutorial explains how they work and what the difference is between the two. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Finance and Capital Markets channel: Subscribe to Khan Academy:



Proof of the law of cosines | Trig identities and examples | Trigonometry | Khan Academy

Фрагмент с начала видео - Proof of the law of cosines | Trig identities and examples | Trigonometry | Khan Academy

Фрагмент с средины видео - Proof of the law of cosines | Trig identities and examples | Trigonometry | Khan Academy

Фрагмент с конца видео - Proof of the law of cosines | Trig identities and examples | Trigonometry | Khan Academy

Proof of the law of cosines to solve for a side of a triangle when 2 sides and an angle are known. Practice this lesson yourself on KhanAcademy.org right now: Watch the next lesson: Missed the previous lesson? Trigonometry on Khan Academy: Big, fancy word, right? Don't be fooled. Looking at the prefix, tri-, you could probably assume that trigonometry ( trig as it's sometimes called) has something to do with triangles. You would be right! Trig is the study of the properties of triangles. Why is it important? It's used in measuring precise distances, particularly in industries like satellite systems and sciences like astronomy. It's not only space, however. Trig is present in architecture and music, too. Now you may wonder.how is knowing the measurement and properties of triangles relevant to music?? THAT is a great question. Maybe you'll learn the answer from us in these tutorials! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Trigonometry channel: Subscribe to Khan Academy:



Introduction to motion

Фрагмент с начала видео - Introduction to motion

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Фрагмент с конца видео - Introduction to motion

Introduction to basic physics of motion. Introduces the concept of variable velocity/acceleration.



Checkmate with Two Bishops

Фрагмент с начала видео - Checkmate with Two Bishops

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Фрагмент с конца видео - Checkmate with Two Bishops

This video illustrates how to checkmate with two bishops. I provide a systematic approach to solving this unlikely chess ending. ★ FACEBOOK ★ TWITTER ★ GOOGLE+ ★ LIVESTREAM Internet Chess Club (ICC)



Unit Circle Definition of Trig Functions

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Фрагмент с конца видео - Unit Circle Definition of Trig Functions

Using the unit circle to define the sine, cosine, and tangent functions



2 dimensional projectile motion (part 1)

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Фрагмент с средины видео - 2 dimensional projectile motion (part 1)

Фрагмент с конца видео - 2 dimensional projectile motion (part 1)

Using vectors to solve 2 dimensional projectile motion problems



Rates-of-change (part 2)

Фрагмент с начала видео - Rates-of-change (part 2)

Фрагмент с средины видео - Rates-of-change (part 2)

Фрагмент с конца видео - Rates-of-change (part 2)

Another (simpler) example of using the chain rule to determine rates-of-change



Return on capital | Finance & Capital Markets | Khan Academy

Фрагмент с начала видео - Return on capital | Finance & Capital Markets | Khan Academy

Фрагмент с средины видео - Return on capital | Finance & Capital Markets | Khan Academy

Фрагмент с конца видео - Return on capital | Finance & Capital Markets | Khan Academy

Introduction to return on capital and cost of capital. Using these concepts to decide where to invest. Created by Sal Khan. Watch the next lesson: Missed the previous lesson? Watch here: Finance and capital markets on Khan Academy: When are you using capital to create more things (investment) vs. for consumption (we all need to consume a bit to be happy). When you do invest, how do you compare risk to return? Can capital include human abilities? This tutorial hodge-podge covers it all. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Finance and Capital Markets channel: Subscribe to Khan Academy:



Erin McKean: The joy of lexicography

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Фрагмент с конца видео - Erin McKean: The joy of lexicography

Is the beloved paper dictionary doomed to extinction? In this infectiously exuberant talk, leading lexicographer Erin McKean looks at the many ways today's print dictionary is poised for transformation. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers are invited to give the talk of their lives in 18 minutes -- including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosling, Al Gore and Arthur Benjamin. TED stands for Technology, Entertainment, and Design, and TEDTalks cover these topics as well as science, business, politics and the arts. Watch the Top 10 TEDTalks on TED.com, at



Navigation Word Problem

Фрагмент с начала видео - Navigation Word Problem

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Фрагмент с конца видео - Navigation Word Problem

Trigonometry problem involving two ships colliding.



Domain of a function | Functions and their graphs | Algebra II | Khan Academy

Фрагмент с начала видео - Domain of a function | Functions and their graphs | Algebra II | Khan Academy

Фрагмент с средины видео - Domain of a function | Functions and their graphs | Algebra II | Khan Academy

Фрагмент с конца видео - Domain of a function | Functions and their graphs | Algebra II | Khan Academy

Figuring out the domain of a function Practice this lesson yourself on KhanAcademy.org right now: Watch the next lesson: Missed the previous lesson? Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions.but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Algebra II channel: Subscribe to Khan Academy:



Introduction to definite integrals

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Фрагмент с средины видео - Introduction to definite integrals

Фрагмент с конца видео - Introduction to definite integrals

Using the definite integral to solve for the area under a curve. Intuition on why the antiderivative is the same thing as the area under a curve.



Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

Фрагмент с начала видео - Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

Фрагмент с средины видео - Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

Фрагмент с конца видео - Exponent rules part 2 | Exponents, radicals, and scientific notation | Pre-Algebra | Khan Academy

2 more exponent rules with an introduction to composite problems Practice this lesson yourself on KhanAcademy.org right now: Watch the next lesson: Missed the previous lesson? Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Pre-Algebra channel:: Subscribe to KhanAcademy:



Graph of the sine function

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Фрагмент с средины видео - Graph of the sine function

Фрагмент с конца видео - Graph of the sine function

Using the unit circle definition of the sine function to make a graph of it.



Collateralized debt obligation (CDO) | Finance & Capital Markets | Khan Academy

Фрагмент с начала видео - Collateralized debt obligation (CDO) | Finance & Capital Markets | Khan Academy

Фрагмент с средины видео - Collateralized debt obligation (CDO) | Finance & Capital Markets | Khan Academy

Фрагмент с конца видео - Collateralized debt obligation (CDO) | Finance & Capital Markets | Khan Academy

Introduction to collateralized debt obligations (to be listened to after series on mortgage-backed securities. Created by Sal Khan). Watch the next lesson: Missed the previous lesson? Watch here: Finance and capital markets on Khan Academy: Interest is the basis of modern capital markets. Depending on whether you are lending or borrowing, it can be viewed as a return on an asset (lending) or the cost of capital (borrowing). This tutorial gives an introduction to this fundamental concept, including what it means to compound. It also gives a rule of thumb that might make it easy to do some rough interest calculations in your head. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Finance and Capital Markets channel: Subscribe to Khan Academy:



Dangerous memes | Dan Dennett

Фрагмент с начала видео - Dangerous memes | Dan Dennett

Фрагмент с средины видео - Dangerous memes | Dan Dennett

Фрагмент с конца видео - Dangerous memes | Dan Dennett

Starting with the simple tale of an ant, philosopher Dan Dennett unleashes a devastating salvo of ideas, making a powerful case for the existence of memes -- concepts that are literally alive. TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers are invited to give the talk of their lives in 18 minutes -- including speakers such as Jill Bolte Taylor, Sir Ken Robinson, Hans Rosling, Al Gore and Arthur Benjamin. TED stands for Technology, Entertainment, and Design, and TEDTalks cover these topics as well as science, business, politics and the arts. Watch the Top 10 TEDTalks on TED.com, at



Why borrowing works

Фрагмент с начала видео - Why borrowing works

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Фрагмент с конца видео - Why borrowing works

An explanation of why (not how) borrowing/regrouping works when subtracting numbers



Multiplying and dividing negative numbers | Pre-Algebra | Khan Academy

Фрагмент с начала видео - Multiplying and dividing negative numbers | Pre-Algebra | Khan Academy

Фрагмент с средины видео - Multiplying and dividing negative numbers | Pre-Algebra | Khan Academy

Фрагмент с конца видео - Multiplying and dividing negative numbers | Pre-Algebra | Khan Academy

Multiplying and dividing negative numbers Watch the next lesson: Missed the previous lesson? Pre-Algebra on Khan Academy: No way, this isn't your run of the mill arithmetic. This is Pre-algebra. You're about to play with the professionals. Think of pre-algebra as a runway. You're the airplane and algebra is your sunny vacation destination. Without the runway you're not going anywhere. Seriously, the foundation for all higher mathematics is laid with many of the concepts that we will introduce to you here: negative numbers, absolute value, factors, multiples, decimals, and fractions to name a few. So buckle up and move your seat into the upright position. We're about to take off! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Pre-Algebra channel:: Subscribe to KhanAcademy:



Calculus: Derivatives 2 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с начала видео - Calculus: Derivatives 2 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с средины видео - Calculus: Derivatives 2 | Taking derivatives | Differential Calculus | Khan Academy

Фрагмент с конца видео - Calculus: Derivatives 2 | Taking derivatives | Differential Calculus | Khan Academy

More intuition of what a derivative is. Using the derivative to find the slope at any point along f(x)=x^2 Watch the next lesson: Missed the previous lesson? Differential calculus on Khan Academy: Limit introduction, squeeze theorem, and epsilon-delta definition of limits. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to KhanAcademy’s Differential Calculus channel: Subscribe to KhanAcademy:



HIV Replication 3D Medical Animation

Фрагмент с начала видео - HIV Replication 3D Medical Animation

Фрагмент с средины видео - HIV Replication 3D Medical Animation

Фрагмент с конца видео - HIV Replication 3D Medical Animation

It is a very excellent animation which explains the hiv replication very clearly. For free download of this video please visit my webpage And other 3D animation videos visit Regards, Dr.Rufus The Lyrics of this video is here Targeting HIV replication The replication of HIV 1 is a multi-stage process. Each step is crucial to successful replication and is therefore a potential target of antiretroviral drugs. Step one is the infection of a suitable host-cell, such as a CD4-positive T-lymphocyte. Entry of HIV into the cell requires the presence of certain receptors on the cell surface, CD4 -- receptors and co-receptors such as CCR5 or CXCR4. These receptors interact with protein-complexes, which are embedded in the viral envelope. These complexes are composed of two glycoproteins: an extracellular gp 120 and a transmembrane gp 41 When HIV approaches the target cell gp120 binds to the CD4-receptors. This process is termed attachment. It promotes further binding to a co-receptor. Co-receptor binding results in a conformational change in gp120. This allows gp41 to unfold and insert its hydrophobic terminus into the cell membrane. Gp 41 then folds back on itself. This draws the virus towards the cell and facilitates the fusion of their membranes. The viral nucleocapsid enters the host cell and breaks open releasing two viral RNA-strands and 3 essential replication enzymes: Integrase, Protease and Reverse Transcriptase. Reverse Transcriptase begins the reverse transcription of viral RNA. It has two catalytic domains: The Ribonuclease-H active site And the polymerase active site Here single stranded viral RNA is transcribed into an RNA-DNA double helix. Ribonuclease- H breaks down the RNA. The polymerase then completes the remaining DNA-strand to form a DNA -- double helix. Now Integrase goes into action. It cleaves a dinucleotide from each 3-prime end of the DNA creating two sticky ends. Integrase then transfers the DNA into the cell nucleus and facilitates its integration into the host cell genome. The host cell genome now contains the genetic information of HIV. Activation of the cell induces transcription of proviral DNA into messenger RNA. The viral messenger RNA migrates into the cytoplasm where building blocks for a new virus are synthesised. Some of them have to be processed by the viral protease. Protease cleaves longer proteins into smaller core proteins. This step is crucial to create an infectious virus. Two viral RNA-strands and the replication enzymes then come together and core proteins assemble around them forming the capsid. This immature particle leaves the cell acquiring a new envelope of host and viral proteins. The virus matures and becomes ready to infect other cells. HIV replicates billions of times per day destroying the hosts` immune cells and eventually causing disease progression. Drugs which interfere with the key steps of viral replication can stop this fatal process. Entry into the host cell can be blocked by fusion inhibitors for example. Inhibition of reverse transcriptase by nucleoside inhibitors or by non-nucleoside Reverse Transcriptase- inhibitors is part of standard antiretroviral regimens. The action of Integrase can be blocked. Protease inhibitors are also part of standard antiretroviral therapy. Each blocked step in viral replication is a step towards better control of HIV disease. Script, Storyboard, Art Direction by: Frank Schauder, MD Animation: MACKEVISION Publicity: Dr.Rufus Rajadurai.MD.,D.DiaDENS.,



Introduction to motion (part 3)

Фрагмент с начала видео - Introduction to motion (part 3)

Фрагмент с средины видео - Introduction to motion (part 3)

Фрагмент с конца видео - Introduction to motion (part 3)

Using the basic equations of distance and velocity to solve motion problems



Graphing trig functions

Фрагмент с начала видео - Graphing trig functions

Фрагмент с средины видео - Graphing trig functions

Фрагмент с конца видео - Graphing trig functions

Analyzing the amplitude and periods of the sine and cosine functions. Practice this yourself on Khan Academy right now:



Quadratic inequalities | Polynomial and rational functions | Algebra II | Khan Academy

Фрагмент с начала видео - Quadratic inequalities | Polynomial and rational functions | Algebra II | Khan Academy

Фрагмент с средины видео - Quadratic inequalities | Polynomial and rational functions | Algebra II | Khan Academy

Фрагмент с конца видео - Quadratic inequalities | Polynomial and rational functions | Algebra II | Khan Academy

Solving quadratic inequalities using factoring Watch the next lesson: Missed the previous lesson? Algebra II on Khan Academy: Your studies in algebra 1 have built a solid foundation from which you can explore linear equations, inequalities, and functions. In algebra 2 we build upon that foundation and not only extend our knowledge of algebra 1, but slowly become capable of tackling the BIG questions of the universe. We'll again touch on systems of equations, inequalities, and functions.but we'll also address exponential and logarithmic functions, logarithms, imaginary and complex numbers, conic sections, and matrices. Don't let these big words intimidate you. We're on this journey with you! About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Algebra II channel: Subscribe to Khan Academy:



Using Trig Functions

Фрагмент с начала видео - Using Trig Functions

Фрагмент с средины видео - Using Trig Functions

Фрагмент с конца видео - Using Trig Functions

Using Trigonometric functions to solve the sides of a right triangle



Definite Integrals (part 4)

Фрагмент с начала видео - Definite Integrals (part 4)

Фрагмент с средины видео - Definite Integrals (part 4)

Фрагмент с конца видео - Definite Integrals (part 4)

Examples of using definite integrals to find the area under a curve



Mortgage-backed securities III | Finance & Capital Markets | Khan Academy

Фрагмент с начала видео - Mortgage-backed securities III | Finance & Capital Markets | Khan Academy

Фрагмент с средины видео - Mortgage-backed securities III | Finance & Capital Markets | Khan Academy

Фрагмент с конца видео - Mortgage-backed securities III | Finance & Capital Markets | Khan Academy

Part III of the introduction to mortgage-backed securities. Created by Sal Khan. Watch the next lesson: Missed the previous lesson? Watch here: Finance and capital markets on Khan Academy: In many commodities markets, it is very helpful for buyers or sellers to lock-in future prices. This is what both forwards and futures allow for. This tutorial explains how they work and what the difference is between the two. About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content. For free. For everyone. Forever. YouCanLearnAnything Subscribe to Khan Academy’s Finance and Capital Markets channel: Subscribe to Khan Academy:



Basic Trigonometry II

Фрагмент с начала видео - Basic Trigonometry II

Фрагмент с средины видео - Basic Trigonometry II

Фрагмент с конца видео - Basic Trigonometry II

Another example of figuring out the sine, cosine, and tangent of an angle in a right triangle



i and Imaginary numbers

Фрагмент с начала видео - i and Imaginary numbers

Фрагмент с средины видео - i and Imaginary numbers

Фрагмент с конца видео - i and Imaginary numbers

Introduction to i. Raising i to arbitrary exponents.


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