First, it is necessary to consider the operating principle of Shkval. When an object moves in the water, it will create bubbles around it due to its motion, which is the phenomenon of cavitation in nature. The super-cavity is a more special case, when a large air bubble appears and covers the entire object, then the object will almost fly in the air due to the maximum elimination of friction. This is the principle applied on the VA-111 Shkval super-fast torpedo. The VA-111 Shkval was researched in the 1960s as a specialized weapon for attack submarines to fight nuclear submarines and enemy surface ships. On November 29, 1977, the VA-111 Shkval super-cavity torpedo was officially accepted into service in the combat component of the Soviet Navy. Shkval torpedo uses a solid fuel engine, the head is fitted with a special cavity-forming device. It is a thick elliptical piece of metal that is sharpened with an angle of inclination to the longitudinal axis, with a circular cross-section to create an angle of elevation. In fact, a foam generator is not enough, so the torpedo head adds foaming air ducts, the bubbles are generated by a gas booster. This allows to increase the volume of air bubbles and create bubbles that cover the entire torpedo body. The Shkval super-cavity torpedo has a speed of 93 km/h out of the launch tube and up to over 360 km/h when the engine is at full capacity, twice as fast as conventional torpedoes. The warhead of the VA-111 has a weight of 210 kg, enough to break a 10,000-ton destroyer in two with a single shot. However, it should be added that besides the advantages, the VA-111 also has deadly disadvantages, making its use in combat must be carefully considered. Firstly, Shkval’s range is too short, reaching a maximum of only 6,858 m, forcing the submarine to be close to the enemy to be able to strike. This is extremely dangerous because modern warships all have advanced sonar navigation systems and extremely powerful anti-submarine weapons. Second, it is the super-cavity technology that creates superior speed that makes the torpedo unable to establish two-way communication, when the radio signal is blocked from the outside, unable to penetrate the air bubbles. The torpedo relies on estimating target coordinates prior to launch, and its maneuverability is also extremely poor, as a sharp turn would break the supercavity bubble. Third, the secrecy of the Shkval torpedo is completely absent, because it creates extremely loud noises and forms a line of bubbles floating on the water that is easy to observe. Finally, the unit price of the Shkval torpedo is said to be significantly higher than the older generation types, while the advantages are not yet outstanding. For the above reasons, guided torpedoes such as TEST-71 or Type 53-65 combined with Kalibr cruise missiles will give modern submarines a higher combat capability, especially without tethering. it faces dangerous situations like when carrying the VA-111 Shkval. Currently, Russia announced that it has initially successfully tested the Shkval 2.0 variant with a longer range and controllability. If the above weapon is soon completed, it will really be able to replace the products of the old generation.

Why are airplane windows oval? In the early 1950s, the world’s first commercial jet was developed and manufactured by De Havilland. This is considered the miracle of the aviation industry. However, after a year of use, the plane fell to pieces right in the sky and within a few months, two more suffered the same fate. Engineers scrutinized the plane’s screws and discovered that the main cause was the square window. With this design, the pressure is higher at the door corners and increases significantly in flight. So the engineers decided to replace it with round or oval windows. Why do airplanes have curved wing tips? During a flight, the pressure on top of the wing is lower than the pressure under the wing. Air tends to shift from high pressure below the wing to low pressure above and around the wing tips. In the past, the wing tips were designed to be straight, causing the airflow to cause serious turbulence. Therefore, the scientists decided to bend the wing tip upwards to reduce turbulence, prolong the durability of the wing and save a lot of fuel during travel. Thanks to this feature, everyone will feel more comfortable during the flight. Why do airplane noses have different shapes? The nose of a military aircraft is pointed, the sharper the nose, the faster it flies. However, if the nose is too long, the pilot cannot see the runway correctly, which is why civil aircraft have round noses. Russian engineers solved this problem in the 1960s. The fastest passenger jet could tilt its nose. During takeoff and landing, the aircraft tilts its nose down and during flight the nose will be brought back to its original position. This strange design is intended to help pilots see the runway better. Why are airplanes painted white? Airplanes are almost always painted white. There are several reasons to explain this problem: Heat Reflection: A plane painted white will accumulate less heat. This is better for passengers and economically beneficial for airlines.
White paint is cheaper than other paints.
Prevent bird collisions: Birds can see reflections from white surfaces better, reducing the risk of collisions with aircraft.
White paint helps reveal small cracks and dents: The paint makes cracks easier to see, identifies problems early, avoids accidents, and makes damage easier to see. Why is the exit on the left? Not all but most aircraft have the main entrance on the left side. There is an explanation: The right side is for luggage (the cargo hatch is also on the right) so it is not safe for passengers.
Some say it’s an old tradition: The train ramp is always on the left.
The aircraft door is installed on the left side, which allows them to park the plane in the passenger area better and move more easily. Why are some planes oddly shaped? You must have heard of stealth aircraft. It has an odd shape to avoid detection by radar, sonar, infrared and other detection means, and to be able to carry more luggage with less fuel consumption. The shape of the plane is inspired by birds. Birds of prey use that shape to increase their range and be less visible. However, these aircraft are often too expensive to be used in civil aviation. How do airplanes look spacious? The designers use a number of tricks to make the plane look taller and more spacious than it actually is. For example, the walls have certain shapes to reflect light correctly. The illumination between the ceiling and the overhead bin makes the ceiling visually taller. Thanks to these tips, people with plane phobia will feel more comfortable. Why don’t pilots have beards? Some airlines ban pilots from growing beards. This is explained that, the beard can cause the oxygen mask to not fit tightly to the pilot’s face and work properly in an emergency situation. In particular, in that case, the pilots must always be alert to save the lives of passengers on the plane.

As noted by the Economic & Urban Reporter, canary flowers have begun to bloom since early May, creating clusters of bright yellow flowers around West Lake. Muong canary also has some other names such as Queen Muong, Lantern Flower, Water Scorpion, Yellow Scorpion, Apricot String, Late Spring Tree, Late Blooming Apricot. Also known as Osaka or Osaka yellow flowers, it grows well in sunny and well-drained places. Tree usually up to 10-20 m tall, fast growing, trunk diameter about 40 cm. Canaries are planted a lot in the area around West Lake and newly built urban areas. The plant is not suitable for arid or cold climates, although it is tolerant of drought and salinity. Canary flowers form large flower clusters, many flowers but sparse, drooping flowers 20 – 40 cm long. Peduncle 15-35 cm or more. The bright yellow color of canaries on the shores of West Lake has attracted the attention of young people. Along the road along the West Lake, it is not difficult to see canaries stand out by the clusters of yellow flowers. The golden canary creates a unique feature that makes West Lake attractive and attractive to many people. It can be seen that there are few urban trees that give such a bright yellow color, even though a few single trees brighten up a street corner. Flowers bloom in large clusters, oval petals, covered with a silky golden color.

The school has an oval shape made from local sandstone. Located in the Thar desert in northern India, Rajkumari Ratnavati Girls School is for 400 girls between the ages of 5 and 16. Diana Kellogg Architects explains that they sought out symbols of femininity and the nearby dunes to create a fortress-like structure that could blend in and grow with the landscape. “As an architect who designs for women, I have considered feminine symbols across cultures and especially symbols of strength,” architect Diana Kellogg tells WebMD. Dezeen . “I ended up choosing this oval shape – representing femininity and representing infinity.” Built of locally sourced hand-carved sandstone, this 836-square-foot fortress-like structure consists of three circular sections. An outer wall surrounds the perimeter of the school, an inner wall surrounds the classrooms and an oval courtyard. The courtyard is in the center of the school and corresponds to the surrounding walls. Parts of the stone wall have been perforated to cool the space and block the sun. “I wanted the school’s design to give shade to the girls in the courtyard. I’ve reduced the width so we can have a canopy cover the open space during the hot months. The ellipse seems to be the most natural way to do this. The circle is familiar to craftsmen because the fortress structure is a series of circular shapes.” Wooden doors lead from the courtyard to the computer center and the 10 classrooms are connected by a series of winding corridors. Ventilation holes in the classroom create a light effect throughout the day and allow for natural ventilation. A ramp between the perforated walls forms a shaded corridor that leads to an elevated walkway to the roof. Perforated balustrades surround the outside of the walkway increasing the height. Its design is a reinterpretation of Jali nets, traditionally used to provide privacy. Blue mosaic tiled floors span the walkway, adding a bright and cool contrast against the yellow stone background. “Effective design is a process that requires a deep understanding of the history of a place – its culture, topography, and vernacular. I wanted to build a building about space, light and community, not about design – a structure that resonates with the soul and harnesses the energy of nature to nurture and heal women and children. sister.” Diana Kellogg Architects oriented the building to maximize the breeze entering the school’s elliptical shape that could passively cool the building. The company also incorporates water harvesting systems to collect and recycle rainwater throughout the school. The solar panels that power the lights and fans are mounted into a steel structure on the roof, which acts as a shady canopy and play area for the children. “I came up with the idea of ​​a solar roof on the roof of the building – which also acts as a kind of jungle gym with seesaws and swings.” The school is a construction project commissioned by the non-profit organization CITTA that aims to equip and support communities around the world. Diana Kellogg will also design two other buildings next to the school. It will feature performance, exhibition, museum and library spaces, as well as a cooperative teaching women’s embroidery and weaving techniques.

According to the SCMP Blackpink stars, famous Chinese beauties like Angelababy and Yang Mi have increased the demand for V-shaped facial aesthetics. Many “photogenic” stars make the trend of making faces even more popular with women. Photo: Sohu. There are many ways to “manipulate” the face You can only take 30 minutes to go through the face shaping and skin tightening treatment. This beauty method is now popular, and is requested by many girls when coming to cosmetic establishments. While the customer closes their eyes, the technician glides the warm device over the face and neck. It emits radio frequency and pulsed magnetic fields to firm the skin, highlight facial contours. In the end, the result is a face with a sharper contour of the jaw, the appearance of the cheekbones. These are the hallmarks of a V-shaped face. “Koreans see V-shaped faces as their standard of beauty. Consequently, many cosmetic treatments aim to achieve the ideal facial balance and eternal youthfulness”, advancing commented Dr. Kevin Chua – co-founder of Dr Kevin Chua Clinic of Medicine and Cosmetology in Singapore – commented. In addition to cosmetic treatments, beauty companies also create products that shape the face. Photo: SCMP. Besides radiofrequency treatments such as the Venus Freeze, many other options are also available. Botox injections to reduce the appearance of jaw muscles are a common choice. Ultrasound therapy Ulthera aims to work deeper into the skin to firm it. In addition, the injection of a filler like Profhilo to help shape the contour face. Beauty brands have also jumped on. The Clarins Company was at the forefront of the V-shaped facial lift that was launched in the late 1990s. It was created to meet the oval face needs of many women in Japan at that time. Many other brands – from high-end brands like La Mer to mid-range including Bio-Essence, Sephora – also offer creams, serums, and masks with invitations that can help shape facial contours. What do the experts say? Before this beauty wave, many experts believe that this is an unhealthy way to do it. “Human faces differ in proportions due to the bone structure, where muscles and fat accumulate on the face. Therefore, trying to have a face like another has a lot of consequences. I don’t understand why. Why do people have to run after that perfectly labeled oval face? “, says Larry Yeo – beauty educator and makeup artist. “Angelababy is one of the stars that make the V-shaped face trend more popular,” SCMP said. Photo: Hk01. The widespread use of photo filters on social media can also distort perceptions more. The user’s appearance is far from reality, the skin becomes pale, the face is stretched. According to Yeo, this created a “senseless illusion”. He encourages everyone to fall in love with their own natural features. If you want to improve on something, you can learn makeup. Meanwhile, Kevin Chua points out the dark side of this beauty approach as you get older. When he was young, the cheeks weren’t sucked in. As we age, the laxity of leather texture increases, causing the shape of the V-shaped face to be turned into a roof with upturned noses. “We can see how the looks of manga and anime characters inspire beauty. Beauty can improve the quality of life. If the surgeon is confident of getting the results he wants, I support it. It is important for the client to know that there are risks involved in surgery, “said Lim, a beauty specialist. As the push for inclusiveness and diversity pervades, Lim hopes more women will learn to love themselves more. She gives one last piece of advice to those who are thinking of doing something drastic to change their looks: “Will this still be appropriate when you turn 65 or 70? This is the reason I never did. tattoo hours “.

For human life today, toilets are extremely popular to serve the daily needs of each individual. However, under the Middle Ages, the aristocrats in Europe had a unique way of dealing with “sadness” in the context of not having toilets in the house. Specifically, hundreds of years ago, the aristocracy in some European countries used a ceramic vase named Bourdaloue when needed to go to the toilet. The Bourdaloue ceramic vase is designed with an oval shape. In addition to ceramic, it is also made of porcelain. Bourdaloue vases are sold in ceramic shops. Customers of the aristocracy often bought a few for home use. Accordingly, the Bourdaloue urns are placed in several rooms, including bedrooms for aristocrats to use at times of day. Unlike men, female aristocrats in Europe often wore spread-out dresses. Therefore, the noblewoman can use a skirt to hide the Bourdaloue vase inside while going to the toilet without losing her aesthetics. After use, the servant will take the Bourdaloue bottle to waste and clean it before placing it back in place. Thanks to the Bourdaloue vase, the aristocracy in ancient Europe was able to handle “sadness” in its own way. Later, the Bourdaloue vase no longer prevailed and gradually disappeared from society when the sanitary ware was invented. Invite readers to watch the video: Russia and Ukraine sign a new agreement on gas transportation to Europe. Source: THĐT 1.