TED Talks - آموزش زبان

🔴انجام تست کوتاه سنجش گرامر از طریق لینک زیر 👇👇 https://bestielts.ir/grammar-quiz/ Join ➣ @BestIELTS ☜عضويت www.bestielts.ir

This came to me very, very early in my career. I had responded to a call. There was a female in her late 50s severely pinned within a vehicle. She had been t-boned at a high rate of speed, critical, critical condition. As the fire department worked to remove her from the car, I climbed in to begin to render care. As we talked, she had said to me, "There was so much more I wanted to do with my life." She had felt she had not left her mark on this Earth. As we talked further, it would turn out that she was a mother of two adopted children who were both on their way to medical school. Because of her, two children had a chance they never would have had otherwise and would go on to save lives in the medical field as medical doctors. It would end up taking 45 minutes to free her from the vehicle. However, she perished prior to freeing her. I believed what you saw in the movies: when you're in those last moments that it's strictly terror, fear. I have come to realize, regardless of the circumstance, it's generally met with peace and acceptance, that it's the littlest things, the littlest moments, the littlest things you brought into the world that give you peace in those final moments. Thank you. #Death #Health #Medicine 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Am I dying? The honest answer I've been a critical care EMT for the past seven years in Suffolk County, New York. I've been a first responder in a number of incidents ranging from car accidents to Hurricane Sandy. If you are like most people, death might be one of your greatest fears. Some of us will see it coming. Some of us won't. There is a little-known documented medical term called impending doom. It's almost a symptom. As a medical provider, I'm trained to respond to this symptom like any other, so when a patient having a heart attack looks at me and says, "I'm going to die today," we are trained to reevaluate the patient's condition. Throughout my career, I have responded to a number of incidents where the patient had minutes left to live and there was nothing I could do for them. With this, I was faced with a dilemma: Do I tell the dying that they are about to face death, or do I lie to them to comfort them? Early in my career, I faced this dilemma by simply lying. I was afraid. I was afraid if I told them the truth, that they would die in terror, in fear, just grasping for those last moments of life. That all changed with one incident. Five years ago, I responded to a motorcycle accident. The rider had suffered critical, critical injuries. As I assessed him, I realized that there was nothing that could be done for him, and like so many other cases, he looked me in the eye and asked that question: "Am I going to die?" In that moment, I decided to do something different. I decided to tell him the truth. I decided to tell him that he was going to die and that there was nothing I could do for him. His reaction shocked me to this day. He simply laid back and had a look of acceptance on his face. He was not met with that terror or fear that I thought he would be. He simply laid there, and as I looked into his eyes, I saw inner peace and acceptance. From that moment forward, I decided it was not my place to comfort the dying with my lies. Having responded to many cases since then where patients were in their last moments and there was nothing I could do for them, in almost every case, they have all had the same reaction to the truth, of inner peace and acceptance. In fact, there are three patterns I have observed in all these cases. The first pattern always kind of shocked me. Regardless of religious belief or cultural background, there's a need for forgiveness. Whether they call it sin or they simply say they have a regret, their guilt is universal. I had once cared for an elderly gentleman who was having a massive heart attack. As I prepared myself and my equipment for his imminent cardiac arrest, I began to tell the patient of his imminent demise. He already knew by my tone of voice and body language. As I placed the defibrillator pads on his chest, prepping for what was going to happen, he looked me in the eye and said, "I wish I had spent more time with my children and grandchildren instead of being selfish with my time." Faced with imminent death, all he wanted was forgiveness. The second pattern I observe is the need for remembrance. Whether it was to be remembered in my thoughts or their loved ones', they needed to feel that they would be living on. There's a need for immortality within the hearts and thoughts of their loved ones, myself, my crew, or anyone around. Countless times, I have had a patient look me in the eyes and say, "Will you remember me?" The final pattern I observe always touched me the deepest, to the soul. The dying need to know that their life had meaning. They need to know that they did not waste their life on meaningless tasks.

🔴Am I dying? The honest answer #Death #Health #Medicine 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴معرفی آزمون تافل هوم ادیشن، نحوه برگزاری آزمون و ویژگی های آن در لینک زیر 👇👇 https://b2n.ir/r76657 Join ➣ @BestIELTS ☜عضويت www.bestielts.ir

I will not let silence wrap itself around my indecision. I will tell Christian that he is a lion, a sanctuary of bravery and brilliance. I will ask that homeless man what his name is and how his day was, because sometimes all people want to be is human. I will tell that woman that my students can talk about transcendentalism like their last name was Thoreau, and just because you watched one episode of "The Wire" doesn't mean you know anything about my kids. So this year, instead of giving something up, I will live every day as if there were a microphone tucked under my tongue, a stage on the underside of my inhibition. Because who has to have a soapbox when all you've ever needed is your voice? Thank you. #Social_Change #Poetry #Spoken_Word 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴The danger of silence Dr. Martin Luther King, Jr., in a 1968 speech where he reflects upon the Civil Rights Movement, states, "In the end, we will remember not the words of our enemies but the silence of our friends." As a teacher, I've internalized this message. Every day, all around us, we see the consequences of silence manifest themselves in the form of discrimination, violence, genocide and war. In the classroom, I challenge my students to explore the silences in their own lives through poetry. We work together to fill those spaces, to recognize them, to name them, to understand that they don't have to be sources of shame. In an effort to create a culture within my classroom where students feel safe sharing the intimacies of their own silences, I have four core principles posted on the board that sits in the front of my class, which every student signs at the beginning of the year: read critically, write consciously, speak clearly, tell your truth. And I find myself thinking a lot about that last point, tell your truth. And I realized that if I was going to ask my students to speak up, I was going to have to tell my truth and be honest with them about the times where I failed to do so. So I tell them that growing up, as a kid in a Catholic family in New Orleans, during Lent I was always taught that the most meaningful thing one could do was to give something up, sacrifice something you typically indulge in to prove to God you understand his sanctity. I've given up soda, McDonald's, French fries, French kisses, and everything in between. But one year, I gave up speaking. I figured the most valuable thing I could sacrifice was my own voice, but it was like I hadn't realized that I had given that up a long time ago. I spent so much of my life telling people the things they wanted to hear instead of the things they needed to, told myself I wasn't meant to be anyone's conscience because I still had to figure out being my own, so sometimes I just wouldn't say anything, appeasing ignorance with my silence, unaware that validation doesn't need words to endorse its existence. When Christian was beat up for being gay, I put my hands in my pocket and walked with my head down as if I didn't even notice. I couldn't use my locker for weeks because the bolt on the lock reminded me of the one I had put on my lips when the homeless man on the corner looked at me with eyes up merely searching for an affirmation that he was worth seeing. I was more concerned with touching the screen on my Apple than actually feeding him one. When the woman at the fundraising gala said "I'm so proud of you. It must be so hard teaching those poor, unintelligent kids," I bit my lip, because apparently we needed her money more than my students needed their dignity. We spend so much time listening to the things people are saying that we rarely pay attention to the things they don't. Silence is the residue of fear. It is feeling your flaws gut-wrench guillotine your tongue. It is the air retreating from your chest because it doesn't feel safe in your lungs. Silence is Rwandan genocide. Silence is Katrina. It is what you hear when there aren't enough body bags left. It is the sound after the noose is already tied. It is charring. It is chains. It is privilege. It is pain. There is no time to pick your battles when your battles have already picked you.

🔴The danger of silence #Social_Change #Poetry #Spoken_Word 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴🔴پکیج رایگان نکات کاربردی گرامر سطح مبتدی برای داوطلبین کلیه آزمونهای بین المللی سنجش زبان در لینک زیر 👇👇 https://b2n.ir/s01910 Join ➣ @BestIELTS ☜عضويت www.bestielts.ir

🔴The myth of Pegasus and the chimera Shielded from the gorgon’s stone-cold gaze, Perseus crept through Medusa’s cave. When he reached her, he took a deep breath, and in one sudden movement, drew his sickle and brought it down on her neck. Medusa’s head rolled to the ground and from her neck sprung two children. One of them was Chrysaor, a giant wielding a golden sword; The other was the magnificent, white, winged horse, Pegasus. He was swifter than any other steed, and with the stomp of his hooves, he could alter mountains and draw streams from dry rock. No bridle could contain him— until one fateful day. Bellerophon, prince of the Greek city-state of Corinth, seemed to have it all. But his ambitions exceeded his earthly circumstances. What he truly wanted was to be a hero so great that the gods would welcome him on Mount Olympus. Bellerophon believed that Pegasus would be key in helping him reach such heights. One night, he visited the temple of Athena, the goddess of war and wisdom, and prayed for the power to appease the mighty animal. When Bellerophon woke, he found a magical golden bridle, and sped to the fountain that Pegasus drank from. As soon as the horse bent towards the water, Bellerophon jumped on his back and slipped the bridle on. Finally, Pegasus was subdued. With this conquest, Bellerophon felt that he was on his way to becoming a legendary hero. He trained for battle day and night. But one training session went horribly wrong, and Bellerophon mortally injured his brother, Deliades. Disgraced, he was exiled to Argos, where King Proetus purified him. Bellerophon was resolved to repair his reputation, but the Queen of Argos had her eye on him. And when Bellerophon rebuffed her advances, she accused him of trying to seduce her, further tarnishing his honor. King Proetus soon devised a plan to exact revenge. He banished Bellerophon and Pegasus and sent them to the kingdom of Lycia, carrying a note to Iobates, Lycia’s king. But unbeknownst to Bellerophon, he was carrying a decree for his own death. Iobates considered how to dispose of the youth and picked just the right monster for the job: the fire-breathing lion-goat-dragon Chimera that had long been terrorizing his kingdom. Bellerophon— eager to achieve greatness— jumped at the challenge. He mounted Pegasus, and the two shot into the sky. Swooping above the earth, they saw the Chimera surrounded by its charred victims. Soon, they too were facing its firepower. In a sequence of agile aerial acrobatics, Pegasus dodged every blast from the Chimera as Bellerophon launched his arrows. Finally, Pegasus closed in on the beast at just the right angle, and Bellerophon dealt it a deadly blow. Iobates was incredulous. He was glad to be rid of the monster, but still needed to deal with Bellerophon. So, he set forth more challenges, putting Bellerophon up against fearsome warriors, highly skilled archers, and, ultimately, Lycia’s best soldiers. Every time, Pegasus’ power turned the tide in Bellerophon’s favor. Finally, Iobates had no choice but to concede that Bellerophon was a true hero. He even offered him his daughter’s hand in marriage. But Bellerophon’s sights were set far beyond the land of mortals. He was certain he must now be entitled to a place on Mount Olympus. So, he jumped onto Pegasus and urged him higher and higher. Zeus watched as Bellerophon, buoyed by hubris, neared his palace. To punish the youth, he released a single gadfly, which beelined towards Pegasus and bit into his flesh. This was as high as Bellerophon would ever get. As Pegasus flinched, he flung his rider into the air, and Bellerophon fell careening back to Earth. Pegasus, on the other hand, ascended with Zeus’s blessing. The gods welcomed him into the halls of Mount Olympus and immortalized him in a constellation. There in the night sky, Pegasus can be seen soaring, unfettered and free. #Education #Storytelling #Ancient_World #TED_Ed #Animation 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴The myth of Pegasus and the chimera #Education #Storytelling #Ancient_World #TED_Ed #Animation 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

Therein lies the problem with all these fast-moving diets— whether you’re cutting calories or food groups, extreme diets are a shock to your system. There are well-established rates of healthy weight loss motivated by both diet and exercise that account for genetic and medical differences. And staying on those timelines requires a dietary lifestyle that’s sustainable. In fact, some of the worst side effects of extreme diets are rarely discussed since so few people stick with them, it also bears mentioning that many societies have unhealthy relationships with weight, and people are often pressured to diet for reasons other than health or happiness. So rather than trying to lose weight fast, we should all be taking our time to figure out what the healthiest lifestyle is for ourselves. #Education #Food #Health #TED_Ed #Animation #Human_Body 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴Is it possible to lose weight fast? In the wealthiest circles of Victorian England, bizarre fads ran rampant. But perhaps none was as strange as the tapeworm diet, in which dieters swallowed an unhatched tapeworm and let it grow inside them by consuming undigested meals. Obviously, this is an exceptionally dangerous and unhealthy way to manage your weight. However, while modern fad diets aren't usually this extreme, they do promise similar results; specifically, losing weight fast. So, are there any fast diets that do work? And are any of them actually healthy for you? To answer these questions, let’s consider a thought experiment. Sam and Felix are identical twins both planning to go on a diet. They share the same height, weight, fat and muscle mass. But Sam is hoping to lose weight slowly, while Felix wants to go fast. Sam's plan is to gradually decrease his calorie intake and increase his regular exercise. With less energy coming in and more being expended, he’s creating an energy deficit inside his body. To compensate, Sam’s body begins breaking down his emergency glucose supply, stored in the liver in the form of glycogen. Then, after 4 to 6 hours, his body starts burning fat cells as a major energy source. This process releases lipid droplets which are broken down into compounds that float through the bloodstream and provide energy to organs and tissues. Felix aims to create a similar energy deficit by dramatically cutting his calorie intake. Unlike Sam, who’s still eating smaller meals, Felix is eating almost nothing. And his body responds by going into a starvation response. Felix’s body breaks down his entire store of emergency glucose in just 18 hours. And while Sam steadily replenishes glycogen with every healthy meal, Felix’s low-calorie diet does not. Desperate for energy, his body starts breaking down other materials, including his muscles. Meanwhile, Sam’s regular exercise is maintaining his muscle mass. This means he’ll use more energy both during exercise and at rest, making it easier for him to lose weight. Felix, on the other hand, is losing muscle mass and burning fewer calories than ever for his body's basic functions, making weight loss even more difficult. Despite all this, there’s one element of Felix’s fast diet that might make him think he's on the right track. Every gram of glycogen is bound to several grams of water. This can add up to two kilograms of water weight, all of which is lost when the glycogen is depleted. For Felix, this might seem like he’s losing weight fast. But as soon as he stops starving himself, his body will replenish its glycogen store and regain that weight. Clearly, Felix’s plan does more harm than good, but extreme calorie reduction diets aren’t the only regimens promising to shed weight fast. Plans called “detoxification diets” either promote or restrict certain foods to provide specific nutrients in high quantities. These can be useful for addressing some nutritional problems, but they’re far too specific to be used as general cure-alls. For example, for a person with low vitamin A, a juice diet might be helpful. But for someone high in vitamin A, juicing could be disastrous. And regardless of personal nutrition, maintaining a juice diet over multiple weeks is likely to compromise the immune system due to a lack of essential fats and proteins.

🔴Is it possible to lose weight fast? #Education #Food #Health #TED_Ed #Animation #Human_Body 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

During an interview in 1964, Koyama lamented that her 17 years of observation had barely been enough to produce a single butterfly record of the solar cycle. But by the end of her career, she’d drawn three and a half cycles— one of the longest records ever made. Better still, the quality of her drawings was so consistent, researchers used them as a baseline to reconstruct the past 400 years of sunspot activity from various historical sources. This project extends Koyama’s legacy far beyond her own lifetime, and proves that science is not built solely on astounding discoveries, but also on careful observation of the world around us. #Women #Science #Education #History #Astronomy #TED_Ed #Animation #Sun 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴The woman who stared at the sun In the spring of 1944, Tokyo residents experienced numerous aerial attacks from Allied bombers. Air raid sirens warned citizens to get indoors and preceded strategic blackouts across the city. But 28-year old Hisako Koyama saw these blackouts as opportunities. Dragging a futon over her head for protection, Koyama would gaze at the night sky, tracking all sorts of astronomical phenomena. However, her latest endeavor required the light of day. By angling her telescope towards the sun, Koyama could project the star's light onto a sheet of paper, allowing her to sketch the sun’s shifting surface. She spent weeks recreating this set up, tracking every change she saw. But while Koyama didn't know it, these drawings were the start of one of the most important records of solar activity in human history. To understand exactly what Koyama saw on the sun’s surface, we first need to understand what’s happening inside the star. Every second, trillions of hydrogen atoms fuse into helium atoms in a process called nuclear fusion. This ongoing explosion maintains the sun’s internal temperature of roughly 15 million degrees Celsius, which is more than enough energy to transform gas into churning pools of plasma. Plasma consists of charged particles that produce powerful magnetic fields. But unlike the stable charged particles that maintain magnetic activity on Earth, this plasma is constantly in flux, alternately disrupting and amplifying the sun's magnetic field. This ongoing movement can produce temporary concentrations of magnetic activity which inhibit the movement of molecules and in turn reduce heat in that area. And since regions with less heat generate less light, places with the strongest magnetic fields appear as dark spots scattered across the sun’s surface. These so-called sunspots are always moving, both as a result of plasma swirling within the sphere, and the sun’s rotation. And because they’re often clustered together, accurately counting sunspots and tracking their movement can be a challenge, depending greatly on the perception and judgment of the viewer. This is precisely where Koyama’s contributions would be so valuable. Despite having no formal training in astronomy, her observations and sketches were remarkably accurate. After sending her work to the Oriental Astronomical Association, she received a letter of commendation for her dedicated and detailed observations. With their support, she began to visit the Tokyo Museum of Science, where she could use a far superior telescope to continue her work. Koyama soon joined the museum's staff as a professional observer, and over the next 40 years, she worked on a daily basis, producing over 10,000 drawings of the sun’s surface. Researchers already knew magnetic currents in the sun followed an 11 year cycle that moved sunspots in a butterfly shaped path over the star’s surface. But using Koyama’s record, they could precisely follow specific sunspots and clusters through that journey. This kind of detail offered a real-time indication of the sun’s magnetic activity, allowing scientists to track all kinds of solar phenomena, including volatile solar flares. These flares typically emanate from the vicinity of sunspots, and can travel all the way to Earth’s atmosphere. Here, they can create geomagnetic storms capable of disrupting long range communication and causing blackouts. Solar flares also pose a major risk to satellites and manned space stations, making them essential to predict and plan for.

🔴The woman who stared at the sun #Women #Science #Education #History #Astronomy #TED_Ed #Animation #Sun 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

I am certain that we are able to be on the side with technology that is brought from abroad to our region being sold in a very expensive way. We have the capacity to develop our own technology, having the necessities of our people in mind. So then people with disabilities and limited resources could live a life again. For me, when people, our users, get back to work on their places, that look of compassion changed to astonishment. The same astonishment which I had when I saw Luke Skywalker prosthesis. So this began as a path for myself, but it now belongs to my entire region. Would you like to join us? Thank you so much. #Technology #Design #Invention #Innovation #Health #Prosthetics #TED_Fellows #3D_Printing 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜

🔴The affordable, 3D-printed bionics of the future One in seven people around the world has some kind of disability. Being born without my right hand has defined who I am over the past 30 years. I was fortunate to grow [up] in the sacred valley of the Incas in Cusco, Peru, surrounded by people who weren't surprised to see me driving my bike or probably playing basketball. When I was seven, I remember being stunned after I watched "Star Wars: The Empire Strikes Back," when Luke's hand gets cut off, the same one I didn't have. But then, being twice as stunned when the medical robots fitted him with a prosthesis that could move and feel. From then on, no greater purpose lived in my mind, which was to have a prosthesis like Luke Skywalker. This dream led me to study mechatronics engineering and access the Biomechanics and Applied Robotics Laboratory in Pontifical Catholic University of Peru, where, with a multidisciplinary team, we developed a myoelectric prosthesis for a long transradial amputation, being me, the pilot user. I was able to move each finger individually. And also we developed a way in which we get to pass the sensation from the fingertips into my forearm using haptic feedback system. Since this was a research project, we had enough funding to buy stuff from abroad. So, for example, the motors you get to see here, were all brought [from] Switzerland. This is one of the main reasons why it will cost at least 40,000 dollars to make this prosthesis. But 40K is way too much, considering that four out of five people with upper limb amputation live in developing countries. Even the 25,000 dollars that cost a robotic prosthesis imported from abroad is way too much. In Peru, that is equivalent to work full time on a minimum wage for almost seven years, just to buy the prostheses. Never mind pay for your food or your house. It is often that people get injured while doing manual labor activities like farming or metal manufacturing. Getting back to work and having access to money demands a functional hand. It took me time to realize what a huge privilege I had to study a career that would help fulfill my dreams. But actually, what was preventing me from developing a solution that was both affordable and functional. The very first step in order to reducing the cost was to reduce the number of motors because they were all imported and therefore expensive. So we get to arrange occupational focus groups with our amputee volunteers in order to identify which gestures they will use the most, and of those, how many we could perform using just a single motor. The answer was three: pinch, cylindrical and lateral. This also helps us to reduce the number of electromyography sensors, too, from an arrangement of eight, we passed just to one. In this way, between makes in mechanical and myoelectric prosthesis, the prices will be dramatically low. But material prices matter to. And that's why we choose to 3D print our prosthesis using mainly plastic from recycled bottles. Like the prosthesis I am wearing right now. In order to develop our prosthesis, the process will go like this. First, we'll use our 3D scan and our own parametrization software in order to take the measures of the amputated area and the other hand of the user. Then we'll recreate the entire set of fingers, the palm and the prosthesis socket in our computational model to finally 3D print each of those parts. So far in LAT Bionics, we have two types of prosthesis. Maki, which is a mechanical activation and Pisko, with electronic activation. Pisko cost just 10 percent of an imported robotic prosthesis that will come from abroad. This means that even more working-class people can access our technology. For me, this has been a path where I was able to develop this in my company LAT Bionics. So, for example, take Franco, [who] now is using his transradial Maki prostheses in order to get back to work with his providers on the jungle farm he has.

🔴The affordable, 3D-printed bionics of the future #Technology #Design #Invention #Innovation #Health #Prosthetics #TED_Fellows #3D_Printing 🎙Join ➣ @TEDTalksLearning ☜ 🎙Join ➣ @TEDTalksLearning ☜