Aha development

What is a Weir?

The first 500 people will get two months of Skillshare Premium for FREE:weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies. Unlike large dams which create reservoirs, the goal of building a weir across a river isn’t to create storage, but only to gain some control over the water level. Over time, the term weir has taken on a more general definition in engineering to apply to any hydraulic control structure that allows water to flow over its top, often called its crest. In fact, the spillways of many large dams use weirs as control structures. So how do they work?-Patreon: Grady HillhouseThis video is sponsored by Skillshare.

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A2 Biology - Mechanism of sliding filament model (OCR A Chapter 13.10)

This video shows the details in the mechanism of muscle contraction based on the sliding filament model. It is mainly about the interactions between actin and myosin and how they bring about movement. It is almost like rowing - with the actin as water, myosin head and filament as the oar and the myosin itself is the rower (except that it stays in the same place).There are three parts to this:1.) Stimulation - How the action potential triggers the mechanism2.) Attachment - How the myosin head attaches to the actin and moves it3.) Detachment - How the myosin head detaches from the actin and be ready for the next attachmentEnjoy! :)Please like, share and subscribe for more content and comment below to let me know what you think! :)Facebook: BioRach - A-level Biology Online@BioRachProjectmusic:"Dreaming in 432Hz" by Unicorn Heads

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Top 10 NEW Upcoming ZOMBIE Games of 2018 & Beyond | PS4, XBox One, PC

TOP 10 BEST Upcoming Games [2019-2020] Cinematic Trailers: || 10 Insane & Epic ZOMBIE Games coming in 2018 | New Upcoming Anticipated Games on PS4, Xbox One & PC. Which game looks the most promising? Post in the comments!==============================================TOP 10 AMAZING Upcoming Games of [2019 & 2020] Cinematic Trailers: Playlist:00:00Dead Island 2 (TBA - PS4, Xbox,PC)02:04The Walking Dead - (2018 - PS4, Xbox, PC)04:05Reborn (2018 - PS4, Xbox, PC)05:29Days Gone (June 30,2018 - PlayStation 4)07:09Daymare 1998 (July 2018 - PS4, Xbox, PC)08:08World War Z (2018 - PS4, Xbox, PC)08:54Dead Matter (2018 - PS4, Xbox, PC)11:01State of Decay 2 (2018 - Xbox,PC)15:20GTFO (2018 - PC) 16:53The Last of Us 2 (2018 - PlayStation 4)

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Nerf War: 2 Million Subscribers

Today PDK Films brings you ! In this Nerf gun war, PDK Films hits 2 million subscribers and the team celebrates. Paul rewards everyone with presents, but Anna and Eva aren't happy with their presents.. . Leave us a comment and LIKE to help us reach THREE MILLION SUBSCRIBERS!Business inquiries ► business@pdkfilms.com#nerf #nerfsquad #pdkfilms #kingkouskyJoin Nerf Squad and subscribe to PDK Films to get all of our new Nerf videos, and remember to turn on post notifications! Also subscribe to my gaming channel: King Kousky.Buy my Nerf guns! ► PDK Films:My name is Paul Kousky and I’m the director of PDK Films, which is the biggest Nerf channel on YouTube! I make all kinds of crazy Nerf videos with Nerf blasters, and I’m known for creating the popular Nerf Squad and Nerf First Person Shooter series on YouTube. If you like Nerf then be sure to join Nerf Squad by subscribing to PDK Films, and remember to check out my gaming channel: King Kousky.Instagram ► ► ► you for watching my Nerf videos!

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Bruce Perry, Early Childhood Brain Development

Children are resilient, a common aphorism, but not necessarily true.Renowned child psychiatrist, Dr. Bruce Perry has researched how a child's environment, particularly those who encounter trauma, affects the child's brain development. Perry talks about his clinical work with children, who experiencedtrauma, how that stress led to both physical and mental health complications and what can be done to improve the lives of at-risk young people. He also talks about our society and how our ancient ancestors had much more supportive social structures for children than today's youth.Perry began his career as a neuroscientist and child psychiatrist in the mid-1980's where he gained an understanding that the earliest experiences of babies and young children affected their overall development.In his book, "The Boy Who was Raised As A Dog," he shares stories about some of his patients who experienced trauma including children who witnessed the murder of a parent, children released from the Branch Davidian compound in Waco, Texas and a child who lived in a cage. The book, co-written with science journalist Maia Szalavitz, explains the complexity of outcomes that can be caused from neglect, maltreatment or specific traumatic event even in the first few months of a baby's life.Yet, it is not examples of lives tragically broken, Perry also offers therapeutic strategies to assist these children to overcome some of the damage. Research and involvement with his patients led Perry to realize that children can suffer from post-traumatic-stress syndrome, not just soldiers returning from war.He found that sometimes, children who were acting out had experienced stress or trauma early in their development that caused them to act in a socially inappropriate manner. Perry witnessed that not all parents inherently give their children the proper positive physical and emotional attention needed for their babies to grow and thrive.At times, extreme intervention is needed for parents and caregivers to be taught how to care for the needs of a child. Jane Whyde, executive director of Franklin County Family and Children First, says that "In a time when we are focused on the importance of kindergarten readiness, third grade reading promise and high school graduation, Perry gives us keys to helping youth be able to learn and succeed in a school setting."She continues, "If we want, as a culture, to ultimately produce tax payers instead of tax consumers, this is the essential place to start.As communities, we must prioritize making this a safe and welcoming world for children, andpartner with parents to assure that children have what they need to grow into strong, healthy, contributing adults."

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RWBY AMV: Survive the Night

I do not own anything. RWBY belongs to Rooster Teeth. "Survive the Night" belongs to Mandopony.Video: RWBY by Rooster TeethSong: Survive the Night by MandoponyProgram: iMovieIf you've never heard this song before, it's a fan-made song for the second installment in the "Five Nights at Freddy's" horror game series created by Scott Cawthon. There are other really good fanmade songs by Mandopony on their youtube channel so I would highly recommend checking them out. The story is basically Penny, Yang, Blake, and Weiss are the animatronics (I didn't really try to make any of them directly represent any of the Five Nights's bots specifically—so that's up to your interpretation). Ruby is the nightguard. Beacon is Freddy's.I don't have the nerve to actually play horror games myself, but I love fan-made stuff like this. Anyway, I hope you thought it was a little creepy. Thanks for watching! Looking forward to it!

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Food Is Weird: Understanding Agriculture in the Developing World

In which John Green flies in a helicopter with Bill Gates in Ethiopia, investigates a new form of cursing, and discusses agricultural reform--specifically, how the UN's World Food Program is trying to improve maize yields in Ethiopia. If you can break the vicious cycle of low incomes leading to low harvests, agricultural productivity per hectare (NOT HECTACRE) can increase dramatically, as we've seen in China and Brazil. It seems boring, I know, but this is a big reason hundreds of millions of people have emerged from poverty in the past 30 years. So hopefully it will happen in Ethiopia! But, as usual, the truth resists simplicity.FRIENDLY REMINDER THAT EDUCATIONAL VIDEOS ARE ALLOWED TO BE MORE THAN FOUR MINUTES LONG.The Gates Foundation: United Nations World Food Programme: all those extra letters in Programme, United Nations? AMERICA CAN SPELL PROGRAM IN JUST SEVEN LETTERS. WE'RE NUMBER ONE. WE'RE NUMBER ONE. No one reads to the end of the description so I can just ramble on down here and say whatever I want.)

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The 4 Temperaments

Four temperaments is a proto-psychological theory that suggests that there are four fundamental personality types, sanguine (enthusiastic, active, and social), choleric (short-tempered, fast, or irritable), melancholic (analytical, wise, and quiet), and phlegmatic (relaxed and peaceful).Original Article:Robin AdkinVoice Over: Christie KAnimation: Nayeli MenesesFeedback Editor: Risha Maes Project Manager: Erin Bogo Producer: Psych2GoMore Psych2Go here: can be directed to Animation@psych2go.net

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The End of Homo Economicus | Mieke Meurs | TEDxAUBG

Economists utterly fail to predict major recessions or even smaller economic events. This failure may be related to one key assumption central to most models--that people behave like "homo economicus," a hyper-rational, narrowly selfish economic man. In this talk, Mieke Meurs highlights recent work in heterodox and feminist economics that suggests that this assumption is unfounded. People are not generally of the type "economicus," nor can they be generalized as "homo." Replacing the foundational assumption of "homo economicus" with assumptions of "socialem personarum" (social persons) is essential if economists are to better predict economic and social outcomes.Mieke Meurs is Professor of Economics at American University and Executive Vice President of the International Association for Feminist Economics. Her areas of research include household behavior, firm organization, and local government.She has published extensively on household behavior, with a particular focus on gender issues and rural households. Recent publications include “A data triangulation approach to understanding the behavior of small landholders in Bulgaria,” in Handbook of Research Methods and Applications in Heterodox Economics and “Doing It All: Women’s Employment and Reproductive Work in Tajikistan,” Journal of Comparative Economics, with Vanya Slavchevska.She holds a Ph.d. in Economics from University of Massachusetts, Amherst and a B.S. in Political Science from the University of Wisconsin-Madison.This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at

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The Story of Kony2012

Someone should really stop this Kony fella.---------Patreon: Channel: Q&A: media, images and music respective to owner(s).

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INTRODUCTION OF EVOLUTION BY LAMARCK AND DARWIN || CSIR-NET/GATE(LIFE SCIENCE)||

Darwin and Lamarck has given the famous theory of Evolution in two different way. Lamarck theory was not supported by scientific evidences where as Darwin theory was.#EVOLUTION #LAMARCK #DARWIN #CSIRNETThis concepts are the part of CSIR-NET/GATE(LIFE SCIENCE) Preparation.Subscribe this channel for the more future videos on different topics.

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The evolution of juggling | Jay Gilligan | TEDxHelsinki

Never miss a talk! SUBSCRIBE to the TEDx channel: Gilligan is a professional juggler and performer from Arcadia, Ohio currently performing and living in Europe. Jay is the main teacher of juggling and creator of the juggling program at the University of Dance and Circus in Stockholm, Sweden.In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)

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From Rio to Lima – Transoceânica, the world's longest bus journey (1/5) | DW Documentary

From Brazil’s Rio de Janeiro to Lima, Peru, the world’s longest bus ride takes 100 hours and spans 6,300 kilometers. Hop aboard for an unforgettable journey along the South America’s Transoceânica highway!The first leg of the journey starts on the Atlantic shore, exploring the Costa Verde, one of the most beautiful coastlines in the country. But it’s not long until the bus crosses into Mato Grasso, the agricultural heart of Brazil, where soy fields and sugar cane plantations dominate the landscape. The region is also the home of the rodeo, a regular event in the villages along the Transoceânica route. We even find female rodeo riders here in spite of all the cultural prejudices.Parts 2-5:Part 2: 3: 4: 5: powerful and informative – DW Documentary is always close to current affairs and international events. Our eclectic mix of award-winning films and reports take you straight to the heart of the story. Dive into different cultures, journey across distant lands, and discover the inner workings of modern-day life. Subscribe and explore the world around you – every day, one DW Documentary at a time.Subscribe to DW Documentary:For more information visit:Instagram:

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General Principles of Hemodynamics

Subscribe to the drbeen Channel HERE: more content from drbeen, click HERE: drbeen videos HERE: drbeen on Facebook HERE: drbeen on Twitter HERE: drbeen on Instagram HERE: new medical lectures across your devices. Stream anywhere, anytime. Try it for free! principles of the cardiovascular system.Organization.Heart as two pumps. Series and parallel circuits.The chemical composition of the venous and arterial blood. Blood flow direction. Various pressures in the cardiovascular system.

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Top 10 Saddest Movie Deaths

Warning: SPOILER ALERT!We know they're just characters in a movie; but when they passed, it hurt. Join as we count down our picks for the top 10 saddest movie deaths. As you can expect, there are some spoilers ahead so SPOILER ALERT.Special thanks to our users Willem Garnier, k_flip, Kyle Cooke, Nicole Calleja, Kevin Rasmussen, JMash97, Phildon Stapleton, Dylan DeWitt, Yoni Krotenberg, Sjdillon10, Philip Folta, joei1977, Andrew A. Dennison, Jordan Bowden, sarahjessicaparkerth, dizzyarcher, Josh3000, Emma Martin, Alysia Victoria Parker, Mattwoott, codster9, aldqbigsquare and Alex Williams for submitting the idea on our Suggestions Page at WatchMojo.com/suggest!Check out the voting page here, you want to suggest an idea for a WatchMojo video, check out our interactive Suggestion Tool at :)Check us out at and We have T-Shirts!Be sure to check out for more info.

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On Top of Spaghetti

Here are the lyrics to so that you can sing along with this fun kids’ song. On top of spaghetti, All covered with cheese,I lost my poor meatball, When somebody sneezed.It rolled off the table,And on to the floor,And then my poor meatball,Rolled out of the door.It rolled in the garden,And under a bush,And then my poor meatball,Was nothing but mush.The mush was as tastyAs tasty could be,And then the next summer, It grew into a tree.The tree was all covered,All covered with moss,And on it grew meatballs,And tomato sauce.So if you eat spaghetti,All covered with cheese,Hold on to your meatball,Whenever you sneeze.Wonderful, wonderful… now everybody sing along.(On top of spaghetti) On top of spaghetti(All covered with cheese)All covered with cheese(I lost my poor meatball) I lost my poor meatball(When somebody sneezed)When somebody sneezed(It rolled off the table)It rolled off the table(And on to the floor)And on to the floor(And then my poor meatball)And then my poor meatball(Rolled out of the door)Rolled out of the door(It rolled in the garden)It rolled in the garden(And under a bush)And under a bush(And then my poor meatball)And then my poor meatball(Was nothing but mush)Was nothing but mush(The mush was as tasty)The mush was as tasty(As tasty could be)As tasty could be(And then the next summer)And then the next summer(It grew into a tree)It grew into a tree(The tree was all covered)The tree was all covered(All covered with moss)All covered with moss(And on it grew meatballs)And on it grew meatballs(And tomato sauce)And tomato sauce(So if you eat spaghetti)So if you eat spaghetti(All covered with cheese)All covered with cheese(Hold on to your meatball)Hold on to your meatball(Whenever you sneeze)Whenever you sneezeAh-choo!Rock ‘N Learn has videos for kids of all ages. Explore our videos by age or subject by going to the home tab and scrolling down. To see our entire collection, click on the videos tab. We add something new at least once a week, so subscribe. Please give them a “thumbs up.” We love hearing from you and will reply to your comments.

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Economic Development & Institutions: introduction to EDI

Institutions matter for growth and inclusive development. But despite increasing awareness of the importance of institutions on economic outcomes, there is little evidence on how positive institutional change can be achieved. The Economic Development and Institutions – EDI – research programme aims to fill this knowledge gap by working with some of the finest economic thinkers and social scientists across the globe. The programme was launched in 2015 and will run for five years. It is made up of four parallel research activities: path-finding papers, institutional diagnostic, coordinated randomised control trials, and case studies. The programme is funded by the UK Department for International Development.

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Frye Gaillard on his book "A Hard Rain: America in the 1960s"

Frye Gaillard discusses his book, "A Hard Rain: America in the 1960s, Our Decade of Hope, Possibility, and Innocence". It's a personal history of a pivotal time in American life. Gaillard explores the political and social movements of the times ― civil rights, black power, women’s liberation, the War in Vietnam, and the protests against it. He also examines the cultural manifestations of change at that time ― music, literature, art, religion, and science . Gaillardlooks at the influence of the Kennedys and Martin Luther King, Jr. as well as Malcolm X, Gloria Steinem, Janis Joplin, Jimi Hendrix, Johnny Cash, Harper Lee, Mister Rogers, James Baldwin, Andy Warhol, Billy Graham, George Wallace, Richard Nixon, Angela Davis, Barry Goldwater, and the Beatles. Gaillard is joined for this Ford Hall Forum by Robert Poulton, Vice President, Marketing & Branding, NBC10 Boston, NECN & Telemundo Boston.WGBH Forum Network ~ Free online lectures: Explore a world of ideasLike us: with us: our complete archive here:

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