Soviet polar explorer at the NP-8 ice station. Photo: Sputnik On May 28, 1962, two Americans parachuted from the B-17 “Flying Fortress,” landing at Severny Polyus-8 (also known as North Pole-8, or NP-8), a research station destroyed abandoned Soviet Union is drifting on an iceberg in the Arctic Ocean. This was the starting point of one of the CIA’s most unusual operations, which went down in history with the codename Operation Coldfeet. Hunting for Soviet ice stations An iceberg station was only useful to Soviet polar explorers until the moment the iceberg on which it rested began to disintegrate. At that time, the scientists will be urgently evacuated and the abandoned station will continue to drift across the ocean until it is completely destroyed. In the early 1960s, the CIA and the US Department of Navy’s Office of Naval Research conducted a real manhunt for abandoned Soviet ice stations. It is believed that in those places are installed sonar detectors of US submarines. Initially, the CIA’s target was station NP-9, discovered by a reconnaissance plane in May 1961. However, this mission stalled and the ice station was pushed too far into the ocean. A tow truck rescues a car mired in snow at a Soviet observation post on an iceberg in the Arctic. Photo: Getty Images In the spring of 1962, about 970 km from Candian Air Force Base in Resolute Bay, another abandoned iceberg station, NP-8, was unexpectedly discovered. It is an opportunity not to be missed. However, American icebreakers could not make their way through the dense ice in the area, helicopters could not reach the location, and it was too dangerous for an aircraft to land on a disintegrating “buoy”. So the CIA decided to drop the agents by parachute. But the question then is how to bring them back. Ultimately, officials decided to use a system that specialized in evacuating CIA agents from hostile territory known as the ‘Skyhook’ developed by Robert E. Fulton in the late 1950s. The system required a a bread-shaped, helium-filled balloon, a 150-meter extension cord and a low-altitude aircraft. Lockheed P-2 Neptune reconnaissance aircraft. Photo: RBTH When they needed to get out of the location, CIA agents would use helium cylinders to inflate their personal balloons, tie one end of the rope to it, and wrap the other end around them. The balloon will rise into the air, and the rescue plane will use special forks to reach for the rope, then release the balloon. The rope was then wound onto a winch and lifted the agents onto the plane. The rescue Major James Smith, an experienced paratrooper who is fluent in Russian, and his colleague, Lieutenant Leonard A. LeSchack, an expert in submarine surveillance systems, spent three days researching the NP-station- 8. They parachute down to the station with some necessary equipment boxes. As expected by the Americans, the Soviet scientists rushed to leave the NP-8 station without taking all the equipment with them. CIA agents unearthed more than 80 documents, collected fragments of equipment left behind by the Soviets, and took about a hundred pictures. Soviet Arctic Station 9. Photo: Sputnik By the time it was designated to evacuate, the weather at station NP-8 had deteriorated dramatically: Visibility had plummeted and icy winds were rushing in. Connie W. Seigrist, the pilot of the plane that rescued the agents, recalls: “I was immediately thrown into a situation that could have been imagined as if I was flying through space.” The aircraft collected the “trophies” using the ‘Skyhook’ system without much difficulty, but with humans it was even more difficult. The wind dragged LeSchack nearly 100 meters above the ice as he waited for evacuation by trying to anchor himself to a block of ice. Even after the plane had picked up, LeSchack spent another 10 minutes dangling in the icy air before being hoisted onto the plane. Major Smith (water drinker) on a B-17 on June 2, 1962; Lieutenant LeShack in the lower right corner. Photo: RBTH After observing what happened to his colleague, Smith released his balloon and grabbed hold of an abandoned Soviet tractor. In the end, he was lifted without any particular difficulty. As a result of Operation Coldfeet, the Americans discovered that the Soviet Union had made significant advances in the study of polar meteorology and polar oceanography. In addition, they obtained evidence that the Russians were using sonar equipment to detect American submarines in the Arctic. “Overall, the Soviet Union’s remarkable achievements in iceberg stations reflect their long experience in this field and the great importance their government places on it,” said Operation Commander, Captain John Cadwalader noted.

The researchers found that from their first flight, these echolocating mammals somehow knew exactly how long it would take for the sound waves of their calls to echo from their prey. again. An innate reference point related to the speed of sound allows bats to judge distance in units of time, as opposed to spatial units like humans. Unlike humans who rely heavily on sight, various types of bats “see” the world around them with their ears. However, just as our eyes can fool ourselves, bats don’t always decode their echoes correctly. Illustration. For the test, the team housed six newborn bats in normal atmospheric conditions, as well as five newborn bats in helium-enriched air. This will increase the speed of the sound. These two groups were then tested for echolocation in their respective environments. When approaching a food target, helium-enriched airborne bats displayed echolocation patterns and normal airborne bat-like flight behavior. When a bat flies and lands somewhere, it requires precise coordination between its call to attract and its body. As the creature gets closer to its target, the bat’s echolocation speed increases, and when landing slows, it rolls its body, straightening its legs. However, in an environment where the speed of sound travels faster, this all happens much faster, causing the bats to land ahead of their target. Despite many attempts, the bats still managed to approach the target using the normal sound reference speed. The problem is that bats never learn from their mistakes. Even when adult bats were conditioned in a helium-enriched environment for several days, the researchers found that they were unable to change this fixed reference point. This is surprising, since sensory learning is an advantage for many animals, especially those with the ability to change conditions. Little known secrets about bats According to the analysis results of scientists, in the feces of bats there is a lot of potassium nitrate salt, also known as salt pepper. This chemical is the main ingredient in many fertilizers. At the same time, it is also used to make explosives and detonators. In the past, especially during the American Civil War, bat droppings were considered an important resource for both sides. Because from this waste, one can extract salt and pepper (which is quite scarce) to supply the army. When it comes to bats, most of us probably think of animals with a “unique” way of sleeping upside down. According to scientists, this unusual sleeping position of bats actually has its own purpose. Specifically, unlike birds or insects, the leathery wings of bats are not strong enough to easily lift them from the ground to the air. Therefore, when resting, bats always choose an elevated position so that when they need to fly, they just drop down, taking advantage of air resistance to support take-off. However, according to statistics, there are 6 species of bats that do not hang upside down when sleeping. Most of them have suckers on their limbs, allowing them to cling to leaves or other flat surfaces to sleep. In fact, only small bats (suborder Microchiroptera) have poor eyesight and must be located using sonar. Meanwhile, the larger representatives (of the suborder Megachiroptera) possess excellent eyesight. Even the vision of these bats is better than that of humans. However, in exchange for “bright” eyes, members of the suborder Megachiroptera do not know how to use ultrasound waves.

Industrial design students Minwook Paeng have just come up with a solution to make it easier to use your smartphone while on the road: the Third Eye robot eye. This is an eye-shaped robot that is fixed on the user’s forehead and detects obstacles in front of them when they use their smartphone on the road. This humorous device allows users to navigate while texting or surfing Instagram without worrying about being obstructed by real-world obstacles. This artificial eye has a translucent plastic shell, with internal components based on the open source electronic platform Arduino. It will be applied to your forehead with a thin gel pad. The device is integrated with a speaker and an accelerometer, which is a sensor commonly found on smartphones used to detect the orientation of the phone and automatically rotate the screen when necessary. The device is integrated with a speaker and an accelerometer, which is a sensor commonly found on smartphones used to detect the orientation of the phone and automatically rotate the screen when necessary. The accelerometer on the Third Eye detects when the user’s head is bent to open the plastic eyelid, revealing a sonar sensor. When detecting an obstacle ahead, the eye will emit a buzzing sound to signal the user. The use of mobile phones while crossing the street is increasing and affects public safety on the street. Even the city of Montclair in Southern California (USA) has introduced a law banning pedestrians from using phones or wearing headphones while walking across the street. First-time offenders will be warned, if they repeat the offense for the second time, they will be fined $100 (about 2.2 million VND), if they repeat the offense many times, the fine will be up to $500 (about 11 million VND). A scientific study has confirmed: people who use mobile phones will walk slower and even go sloppy. Due to paying attention to the phone screen so as not to type the wrong content or read the message correctly, the human observation ability will be narrowed, limiting the ability to detect obstacles and not avoid timely. As a result, accidents can happen whenever, for example, hitting other people or crashing into traffic. Please watch the video: Robot make in Vietnam knows how to do math. Source: VTV

However, one sense that humans can soon master, is bat-like echolocation. Sixth sense experiment According to the Popular Mechanics Scientists in Japan have tested this ability in a laboratory, proving that humans can use it echolocation , or the ability to sense echoes for navigation. This ability helps people recognize the shape and rotation of many objects. Thanks to that, people can “see” in the dark. When the volunteer presses the tablet, a synthesized echo is emitted from the amplifier speaker (red line). The sounds obtained with the binaural are 1/8 of the original pitch by reducing the sampling frequency, which is transmitted into the volunteer headphones (green line). Photo: Miwa Sumiya. As bats fly around objects, they emit intense sound waves from different angles and bounce off at isolated intervals. Thanks to that, this tiny mammal can determine the topography, texture or movement of an object. According to Dr. Miwa Sumiya, if humans were able to perceive the patterns of time-changing sounds similar to bats, they could see the world in new ways. Dr. Sumiya, a researcher at the Center for Nerve and Information Networks in Osaka, Japan and was the first author of a paper to appear on Plos One on this topic. “Testing that humans are capable of detecting multiple environments via sound waves could add a new step in understanding the complexity of the human brain,” Sumiya said. According to Sumiya, humans have the ability to further understand the perception of other species (such as bats) by comparing with knowledge gained in echolocation studies of humankind. To test this theory, Mrs. Sumiya’s group made a meticulous arrangement. In one room, the researchers gave volunteers a pair of headphones and two tablets, one that produced a calibrated signal using a synthesized echo, the other to listen to pre-recorded echoes. . In room 2, only the strangely shaped 3D axes stand in one place and rotate around themselves. When prompted, 15 volunteers turned on echolocation signals from their tablets. The sound waves emit each beat, travel to room 2 and hit the 3D axes. Participants need a little bit of imagination to convert sound waves into a certain object. Sumiya explained that the synthesized echo-locating signals used in this experiment were high-frequency signals up to 41 kHz, which cannot be heard by humans. Dolphins are also a mammal that uses echolocation to detect and hunt. Photo: Getty Images. Researchers used a humanoid (1/7 the size of a real skull) to “hear” the sound in room 2 before passing it on to volunteers. The fake head is equipped with 2 microphones attached to the two ears and creating a 3D resonance. The sound output is quite similar to the surround sound experienced in movie theaters. Reducing the frequency of the echoes in both ears enabled volunteers to hear “with the feeling of being heard in real space”. Many people like to listen to podcasts or watch videos with headphones to create surround sound and give a tingling sensation in their ears. This is called the Autonomous Sensory Meridian Response, or ASMR. Result Finally, researchers and volunteers guessed whether echoes were coming from stationary or spinning objects. At the end of the experiment, the volunteers were able to accurately identify two pillars thanks to the time-varying echolocation signals emanating from them. Identifying clue is thanks to the pitch and timbre. However, it was difficult for them to discern the shape of the standing pillars. Sumiya’s group study is not the first to test the ability of human echolocation. Previous studies have shown that blind people can use mouth-clicking sounds to see 2D objects. However, Ms. Sumiya said her experiment was the first to specifically explore the ability of echolocation to change over time. The researchers said their work is evidence that both humans and bats are capable of decoding objects through sound. In the future, engineers could apply this technology to wearable devices such as watches or glasses to improve how visually impaired people can navigate the world, except for headsets.

How to use a Wellderma fish face washer Step 1: Wet your face. If you have makeup, use makeup remover to remove cosmetics from your skin. Step 2: Apply cleanser to the skin or apply directly to the Wellderma washing machine, both are okay. However, the first way to help cleanse the skin better. Step 3: Press the power in the middle to start the machine. Gently glide on the skin in a circular pattern, from inside to outside, from bottom to top for 1 minute. Move evenly on the face including cheeks, forehead, chin and nose. Each place should only clean for 10 – 15 seconds. You can increase or decrease the vibration mode with 2 +/- buttons on the device. You also avoid pressure, just move gently on the skin. Do not use for longer than 2 minutes to avoid skin irritation. Step 4: Wash your face with clean water. Because Wellderma Cleansing Fish does not have a self-disconnecting function like high-end face washers, you should watch 1 – 2 washing your face, then press the power button to turn off the machine. Step 5: Finally, you proceed with the normal skin care steps. Step 6: If you need a massage, press the start button and use the back of the machine to massage your facial muscles. If you want to lift muscles, use the “metal tail” of the washing machine. When you massage, lift your facial muscles, remember to move to the skin near the corner of the eye, the sides of the nose and under the chin to promote the effect. You can also use the back to “spread evenly” the lotion and serum soak evenly into the skin. By applying the essence to the skin, then turn on the machine and use the rear wave pattern to massage the skin. Thanks to the sound wave vibration technology, the device will push the essence into the skin, more effectively than using your hands! After using the Wellderma washing machine, remember to clean it thoroughly. How to clean the Wellderma Cleansing Fish It is completely wrong to think that cleaning the face is not necessary. In fact, after washing the face, although more or less there are impurities such as dirt, cleanser residue can stick to the silicon spike surface of the machine. Failure to sanitize regularly will create opportunities for bacteria to grow. On the other hand, when the washing machine is not clean, the cleaning process is ineffective but also pushes bacteria into the skin. Therefore, in addition to cleaning the face, pay attention to cleaning the washing machine. Here are 4 steps to clean your face: Step 1: Put a quantity of cleanser on the surface of the device and then apply it with your hands to create foam Step 2: Use a toothbrush or a special brush to clean each silicon spike within 1-2 minutes Step 3: Rinse the surface of the washing machine with water, pay attention to this step, wash it thoroughly to completely remove the cleanser foam. Step 4: Use a soft cloth or cotton pad to gently pat dry the water on the washing machine and then leave it in a cool, dry place. So with only 4 simple steps to clean Wellderma washing machine, to be ready for the next wash. Some notes when using Wellderma washing machine Do not share Wellderma Cleansing Fish with anyone. Also not recommended for skin areas other than the face. For sensitive skin, do not use the Wellderma facial cleanser because the spines are quite hard. You should choose the best face washers today such as Emmie, Halio, Pebble Lisa, … will feel the smoothness. The selling price is also quite cheap, from 300,000 VND to 700,000 VND. For more advanced, use Foreo, Artistry, Lumispa, Juvera, … Every day you should only use Wellderma face washers 2 times: morning and night. Do not exceed 2 minutes at a time to avoid irritating the skin. Why can’t the Wellderma Cleansing Fish wash machine on / off? There are 2 reasons why the Wellder washing machine does not turn on / off. The first is your machine has been damaged, in water or has a circuit. Second, you may have bought the wrong fake face washer, a fake Wellderma brand. Due to its low price, the Wellderma washing machine is water resistant for only 3 minutes. The finish is not high, especially the rear charging hole does not have a lid, easy to absorb water inside. Therefore, right from the time you buy it, you should charge it right away. Then, using clear tape, re-glue this position. If the machine is exposed to water, or the circuit is contacted, it cannot be repaired. If you buy the wrong goods, the poor quality you will also face the same situation. On / off is not possible. To buy a genuine Wellderma washing machine, you should choose a reputable place to buy, many of you choose. Also know how to distinguish real and fake when purchased. Just check the barcode to know immediately. Hope the above shares help you know how to use Wellderma washing machine right from the moment you buy it. See more articles about face washers at https://medayroi.com/suc-khoe-lam-dep/ to get the most useful information during skincare.

As is known, the Foreo Luna mini 2 is a very hot product on the market. It possesses a lot of outstanding features in skin cleansing, giving you a shiny and smooth skin. However, on the market today, this face wash machine has a lot of counterfeit and difficult to distinguish. So let’s find out how to distinguish mini foreo luna face washing machine 2 genuine and fake goods, below this article. The Foreo Luna mini 2 with superior technology The Foreo Luna mini 2 is known not only as an ordinary facial cleanser but also as an excellent skin care technology. Here are the remarkable points of this machine: Get T-Sonic sound waves with 8,000 pulses per minute One of the highlights of the car face washing machine This is the vibration of the T-Sonic sound waves. Moreover, with the vibration mode of this machine will help you remove dirt without having to friction. Thereby helping you to limit the skin damage or irritating conditions. Moreover, the soft silicon spikes combined with T-Sonic sound waves bring a comfortable feeling to use. Wear optimal design For this machine is designed with a large brush to help you cleanse the skin effectively. Moreover, the soft silicone optimally cares for the skin with a much higher antibacterial ability than other conventional cleaning brushes. Outstanding water resistance Foreo has always been confident with the water resistance of this machine, you can comfortably use it even if the battery charging hole of the device does not have a cover, without worrying about being damaged. Moreover, the charging hole of the machine also does not rust when exposed to the water environment, you can be assured of using it for a long time. How to distinguish fake foreo luna mini 2 face washers? In fact, when looking at the genuine Foreo cleanser and Fake goods, they look quite similar, so it is difficult to distinguish. Here are the ways to help you distinguish fake and genuine products of this machine, specifically as follows: Both genuine and fake products have outside packaging, with genuine products will have a seal with a clear line and lower design than the counterfeit. Besides, counterfeit goods will not have stamps. ● In addition, you can also rely on the Foreo font color printed on the box, for counterfeit goods will have dark text and the actual text will be printed with a light color. So if you see the Foreo word printed on a box with dark black eyebrows, it is Fake. ● For counterfeit machines underneath the box with only the barcode and product name. For real goods there will be a lot of information such as barcode, origin, product name along with other symbols. ● Also inside the box Foreo Luna mini 2 is a genuine product will always get a plastic tag when you scratch out will have a code to help you register for warranty. Besides fake products will not have this, this is how you can distinguish this machine from genuine from Fake. ● The genuine machine will have a charger in a paper box with a sharp design. Besides counterfeiting, there will be a charging cable that is quite short as well as incomplete. With the information we shared that may have helped you perhaps help you answer the question of how to distinguish a fake Foreo Luna mini 2 face washing machine. At the same time, here will help you buy a face wash with the best quality. Moreover with this machine will help you take care of your skin more easily, giving you a soft and white skin.