TED Talks - آموزش زبان

🔴Can you solve the logician's rave riddle? Once each year, thousands of logicians descend into the desert for Learning Man, a week-long event they attend to share their ideas, think through tough problems... and mostly to party. And at the center of that gathering is the world’s most exclusive club, where under the full moon, the annual logician’s rave takes place. The entry is guarded by the Demon of Reason, and the only way to get in is to solve one of his dastardly challenges. You’re attending with 23 of your closest logician friends, but you got lost on the way to the rave and arrived late. They're already inside, so you must face down the demon alone. He poses you the following question: When your friends arrived, the demon put masks on their faces and forbade them from communicating in any way. No one at any point could see their own masks, but they stood in a circle where they could see everyone else’s. The demon told the logicians that he distributed the masks in such a way that each person would eventually be able to figure out their mask’s color using logic alone. Then, once every two minutes, he rang a bell. At that point, anyone who could come to him and tell him the color of their mask would be admitted. Here’s what happened: Four logicians got in at the first bell. Some number of logicians, all in red masks, got in at the second bell. Nobody got in when the third bell rang. Logicians wearing at least two different colors got in at the fourth bell. All 23 of your friends played the game perfectly logically and eventually got inside. Your challenge, the demon explains, is to tell him how many people gained entry when the fifth bell rang. Can you get into the rave? Pause here to figure it out yourself. Answer in 3 Answer in 2 Answer in 1 It’s initially difficult to imagine how anyone could, using just logic and the colors they see on the other masks, deduce their own mask color. But even before the first bell, everyone will realize something critical. Let’s imagine a single logician with a silver mask. When she looks around, she’d see multiple colors, but no silver. So she couldn’t ever know that silver is an option, making it impossible for her to logically deduce that she must be silver. That contradicts rule five, so there must be at least two masks of each color.

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🔴Get comfortable with being uncomfortable #Fear #Communication #Humanity #Race 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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♦️بعضی از دوستان سوال پرسیدن در خصوص این ایردراپ لازم هست که توضیح بدیم این پروژه هیچ مشکلی نداره و کاملا تایید شده هست و براحتی میتونین کسب درامد کنین از این طریق بدون هیچگونه نگرانی همونطور که خیلی ها دارن استفاده میکنن و مشکلی هم رخ نداده و امنیتش توسط تیم بست آیلتس تایید میشه.

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She convinced her supervisors to let her stay– which meant doing the work of six radio operators singlehandedly. Over the following months, she tracked and transported supplies to the French resistance, sent reports of Nazi activity back to London and arranged safe passage for allied soldiers. This work was essential to building the French resistance and Allied intelligence networks– and, ultimately, ending the war. Protected only by her quick thinking and charisma, she frequently talked her way out of questioning. When the Gestapo searched her on the train, she gave them a casual tour of her “film projector.” When an officer spotted her hanging her aerial, she chatted about her passion for listening to music on the radio– and charmed him into helping her set up the cable. In her entire four month tenure, her sharp wits and stealth never failed her. But her charm had inspired lethal jealousy. In October 1943, the sister of a colleague, in love with an agent that loved Noor, sold her address to the Gestapo. Noor refused to give away any information, focusing instead on her escape. Secreting a screwdriver away from the guards, they were able to loosen a skylight and slip out into the night. But just as the prisoners began to run for their lives, an air raid siren alerted her captors. Noor was caught once again and sent to a German prison. Then, on to Dachau concentration camp. Despite being tortured, deprived and isolated, Noor gave nothing away. In the moments before her execution she is thought to have shouted “Liberté!” Since her heroic sacrifice, Noor has been honoured as a hero who waged secret battles behind enemy lines– paving the way for freedom without ever taking a life. #Animation #War #Activism #TED_Ed #Women #Feminism #History #Evil #Religion #India #Europe #Politics #Identity #World_Cultures #Culture #Democracy #Death #Military 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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🔴WWII’s surprising secret agent Noor Inayat Khan was in the midst of a desperate escape. She had been imprisoned for her activities as an Allied spy, but with the help of a screwdriver and two other prisoners, she was back under the Parisian stars. As she began to run, her thoughts leapt to the whirlwind of events that had brought her here… Born in Moscow in 1914 to an Indian Muslim father and an American mother, Noor was raised in a profoundly peaceful home. Her parents were Sufi pacifists, who put their faith in the power of music and compassion. They moved to Paris, where Noor studied child psychology and published children’s books. But all this changed with the advent of the Second World War. In May 1940, with the German army ready to occupy Paris, Noor and her brother were faced with a difficult choice. As pacifists, they believed that all disputes should be settled non-violently. But witnessing the devastation across Europe, they decided that standing on the sidelines was not an option. Traveling to England, Noor volunteered for the Women’s Auxiliary Air Force and trained as a radio operator. She immersed herself in wireless operations and Morse code– unaware that she was being monitored by a secret organization. The British Special Operations Executive was established to sabotage the Germans in Nazi-occupied countries. As a trained radio operator who knew Paris well and spoke fluent French, Noor was an attractive recruit. In her interview, she was warned that wireless operation was some of the most dangerous work in the intelligence field. Operators had to lug a conspicuous transmitter through enemy territory, and the clandestine agency couldn’t protect her if she was caught. Noor accepted her assignment immediately. While she was determined to take her pacifist principles as far as possible, Noor had to learn the art of espionage. She learned how to contact intelligence networks, pick a lock, resist interrogation and fire a gun. In June 1943 she landed in Angers, south of Paris, and made her way to the city armed with a false passport, a pistol and a few French francs. But her network was compromised. Within a week of her deployment, all her fellow agents were arrested, and Noor was called home.

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🔴Why working from home is good for business? #Work #Work_Life_Balance #Business 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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🔴Why sitting is bad for you? Right now, you're probably sitting down to watch this video and staying seated for a few minutes to view it is probably okay. But the longer you stay put, the more agitated your body becomes. It sits there counting down the moments until you stand up again and take it for a walk. That may sound ridiculous. Our bodies love to sit, right? Not really. Sure, sitting for brief periods can help us recover from stress or recuperate from exercise. But nowadays, our lifestyles make us sit much more than we move around, and our bodies simply aren't built for such a sedentary existence. In fact, just the opposite is true. The human body is built to move, and you can see evidence of that in the way it's structured. Inside us are over 360 joints, and about 700 skeletal muscles that enable easy, fluid motion. The body's unique physical structure gives us the ability to stand up straight against the pull of gravity. Our blood depends on us moving around to be able to circulate properly. Our nerve cells benefit from movement, and our skin is elastic, meaning it molds to our motions. So if every inch of the body is ready and waiting for you to move, what happens when you just don't? Let's start with the backbone of the problem, literally. Your spine is a long structure made of bones and the cartilage discs that sit between them. Joints, muscles and ligaments that are attached to the bones hold it all together. A common way of sitting is with a curved back and slumped shoulders, a position that puts uneven pressure on your spine. Over time, this causes wear and tear in your spinal discs, overworks certain ligaments and joints, and puts strain on muscles that stretch to accommodate your back's curved position. This hunched shape also shrinks your chest cavity while you sit, meaning your lungs have less space to expand into when you breath. That's a problem because it temporarily limits the amount of oxygen that fills your lungs and filters into your blood. Around the skeleton are the muscles, nerves, arteries and veins that form the body's soft tissue layers. The very act of sitting squashes, pressurizes and compresses, and these more delicate tissues really feel the brunt. Have you ever experienced numbness and swelling in your limbs when you sit? In areas that are the most compressed, your nerves, arteries and veins can become blocked, which limits nerve signaling, causing the numbness, and reduces blood flow in your limbs, causing them to swell. Sitting for long periods also temporarily deactivates lipoprotein lipase, a special enzyme in the walls of blood capillaries that breaks down fats in the blood, so when you sit, you're not burning fat nearly as well as when you move around. What effect does all of this stasis have on the brain? Most of the time, you probably sit down to use your brain, but ironically, lengthy periods of sitting actually run counter to this goal. Being stationary reduces blood flow and the amount of oxygen entering your blood stream through your lungs. Your brain requires both of those things to remain alert, so your concentration levels will most likely dip as your brain activity slows. Unfortunately, the ill effects of being seated don't only exist in the short term. Recent studies have found that sitting for long periods is linked with some types of cancers and heart disease and can contribute to diabetes, kidney and liver problems. In fact, researchers have worked out that, worldwide, inactivity causes about 9% of premature deaths a year. That's over 5 million people. So what seems like such a harmless habit actually has the power to change our health. But luckily, the solutions to this mounting threat are simple and intuitive. #Health #Public_Health #TED_Ed #Animation #Human_Body #Exercise #Physiology 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

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