With the iPhone 12, it is only a year away from a quarter. At this node, I was lucky to receive the Nelkin magnetic suction and lens painting protective case from ZEALER. Especially in the form of the Guangzhou epidemic, it is very happy to be able to sit quietly in the residence and experience the product slowly. Next, I will share the experience of the whole set of products under the shell film + wireless charging.

iPhone 12 magnetic + lens sliding cover protective shell & film:

Green

1. The skin-friendly is particularly strong, the patented sliding cover lens protection design is easy to use, and the lens ring has a unique heightening to prevent the lens from scratching and dusting.

2. The official display shows that there are 38 built-in magnets, which is convenient for magnetic charging, and the Magsafe is stable when it is sucked in.

3. The inner lining is soft fiber, which can better protect the body. The back is also very simple. 4. The body is surrounded in place, and a relatively protective layer can be felt almost all over the body. However, the same skin-friendly soft glue as the surface is used directly at the interface position and button position of the mobile phone, which is very good for the protection of the product. Will affect the use. 5. It feels a little tight to use. Black Mirror Pro sliding cover goggles: 1. The design is really steel. Looking at the business, it feels like a military industry when holding it. The gap between the sliding cover and the shell is tight, and there is a hidden buckle designed to prevent the lens cover from loosening. 2. The hand feeling is naturally a protective hand feeling. When I put it on my hand, the strong scratching feeling of the original iPhone 12 is gone, but the overall feeling is the kind of friction that is protected in place. It does not increase the friction of the hand and it is durable. Carefully on the ground, nothing happened when I picked it up. This picture was taken after I fell, and there is no trace of falling. 3. Looking at the material, the original side is TPU soft glue, which is very friendly to the button interface, etc., while the back is the PC back shell, which is still very good for product protection. 4. Magnetic attraction is also very powerful. Correspondingly, it will naturally be a little heavier if the material is full. Full screen privacy protection film 1. The packaging is very different. In addition to the film itself, it also brings a small thing similar to paper towels. More importantly, it is the gospel of a handicapped party-the film applicator, which can be applied directly, and it can be applied without too much effort. . 2. 28-degree side anti-peep, anti-fingerprint, full coverage, with dust-proof net, 0.33 slim, sensitive to the touch, very friendly to use, but face recognition occasionally affects. 3. Anti-peeping is really useful, you don’t have to worry about being peeked anymore in daily use 4. Tempering treatment adds another layer of protection for daily use. The official display is composed of oleophobic coating, explosion-proof film layer, Japanese AGC material, and silicone coating, which once again enhances the protection of mobile phones.

Magnetic wireless charger:

1. The casual black Magsafe magnetic charging, smooth arc edge, round and smooth, feels good to use, will not scratch your hands, is also very friendly to mobile phones, will not scratch the mobile phone. 2. It’s easy to stick in place, suck it up immediately, charge it up immediately, and quickly replenish energy. Supports up to 15W, which is very convenient for charging mobile phones. 3. The compact body is close to the original thickness, only 5.2mm. The front is a mirrored minimalist design, and there is only a NIILKIN LOGO on the back. Just simple and capable. 4. Over-temperature, over-voltage, short-circuit and over-current protection, as well as metal foreign body detection, which is particularly friendly when charging mobile phones. 5. Compatibility is particularly good. The mobile phone can be charged, and another interesting thing is that it comes out of the main body, it has a C port, and then another C2C cable, and at the same time I gave a small adapter from the C port to the A port. I like this very much. . to sum up: After a whole set, I found that Nelkin’s product idea is really good. It protects mobile phones in place, and then takes into account all aspects, and meticulously solves all aspects of mobile phone use. I personally recommend it

The Sun’s atmosphere can be as hot as 1 million degrees Celsius. This increase in temperature, despite the increased distance from the Sun’s primary energy source, has been observed in most stars. In 1942, Swedish scientist Hannes Alfvén hypothesized that the magnetizing waves of plasma could carry large amounts of energy along the Sun’s magnetic field from the interior to the corona, passing through the photosphere. before exploding with heat in the upper atmosphere of the Sun. This hypothesis has been tentatively accepted, but there is no evidence that these waves exist. Recent research by scientists finally confirms Alfvén’s nearly 80-year-old hypothesis and brings us one step closer to harnessing this high-energy phenomenon on Earth. The sun is made up almost entirely of plasma Halo problems have been around since the late 1930s, when the Swedish spectrographer Bengt Edlén and the German astrophysicist Walter Grotrian first observed phenomena in the sun’s corona that could only be observed. present if its temperature is a few million degrees Celsius. This represents temperatures up to 1,000 times hotter than the photosphere below it, which is the surface of the Sun that we can see from Earth. Estimating the heat of the photosphere has always been relatively simple: we simply measure the light reaching us from the Sun and compare it with spectral models that predict the temperature of the light source. Through decades of research, the temperature of the photosphere has always been estimated to be around 6,000°C. Edlén and Grotrian’s discovery that the Sun’s corona is much hotter than the photosphere – albeit farther from the core. of the Sun, its supreme source of energy – has given the scientific community a headache. Scientists looked at the properties of the Sun to explain this difference. The sun is made up almost entirely of plasma, which is a highly ionized gas that carries an electrical charge. The movement of this plasma in the convection zone – the upper part of the sun – generates enormous electric currents and strong magnetic fields. These magnetic fields are then pulled up from the Sun’s interior by convection, and enter its visible surface in the form of sunspots, which are clusters of magnetic fields that can form a variety of magnetic structures. differences in the Sun’s atmosphere. Alfvén reasoned that within the Sun’s magnetized plasma, any large movement of charged particles would perturb the magnetic field, creating waves that could carry enormous amounts of energy across vast distances. (from the surface of the Sun to its atmosphere). Heat travels along what is known as a flux tube from the sun before bursting into the corona, creating its high temperature. Measure the temperature of the Sun with an imaging spectrometer These magnetic plasma waves are now known as Alfvén waves, and the explanation for the heating of the circle led to Alfvén being awarded the 1970 Nobel Prize in Physics. The Interferometric Bidimetric Urban Spectrometer (IBIS) for imaging spectroscopy, installed at the Dunn Solar Telescope in the US state of New Mexico. This instrument has allowed researchers to make more detailed observations and measurements of the Sun. Combined with good observational conditions, advanced computer simulations, and the efforts of an international team of scientists from seven research institutions, they used IBIS to confirm the existence of waves for the first time. Alfvén in flux tubes from the sun. The researchers also expect more solar discoveries soon, thanks to new, groundbreaking missions and tools. The European Space Agency’s Solar Orbiter satellite is currently in orbit around the Sun, providing images and making measurements of the star’s unexplored polar regions. The launch of the new high-performance Solar telescope is also expected to enhance our observation of the Sun from Earth.

Recently, I’ve been busy with work, so I can’t come home early to pick up my children. My mother-in-law was convenient to pick up the son of her brother-in-law’s family, so I asked her to pick up my son as well. Because the two kids go to the same school. I also do not ask my mother-in-law for nothing. From the day she picked me up, I sent her 1 million dong every month. I do it to feel comfortable. I don’t like to ask for help from others. The school is about 1km from my house. Mother-in-law is old and can’t ride a motorbike, so she has to walk pick up the kids . g, I also feel secure. After all, this is also her grandson, she must also be responsible. Illustration. At first I didn’t see anything out of the ordinary. But recently, every time I pick up my child from my mother-in-law’s house, I see her crying out in pain. My hands have many bruises, scratches and scrapes. Thinking that I was being bullied by my classmates, I called the homeroom teacher and received the answer: “The children in class are very good. There is no fighting. I do not believe you can monitor the camera of the classroom. “. I also watch the camera. Indeed, my child never fought with his classmates. I told this story to my mother-in-law, hoping that she would pay more attention to her when she picked me up. However, my mother-in-law was sober, and pouted her lips: “Oh yeah, there are 3 bruises. Sometimes she messed with her classmates and caused it without remembering. But when I picked it up, I didn’t see anything. often”. The bruises and scratches on my child’s hands are increasing day by day. This scar has just faded, a new bruise appears… Then I decided to take an early leave from work one day to pick up my son. I want to find out where my child’s hand injuries come from. I did not tell my mother-in-law about this. I still let her pick her up normally. Partly because I was afraid of her thinking, the other part I wanted to investigate quietly. Then at 5 o’clock, the gate of the kindergarten began to have many parents come to pick up their children and grandchildren. I quickly realized that my mother-in-law was also lined up among them. My baby rushed out and politely greeted her. But still had to wait for her to pick up her brother. Look at the sweaty baby and feel sorry. It must be very hot, but I don’t know how to ask her to fan it. 3 granddaughters lazily returned. I go from afar to monitor. Only then did I realize the anomaly. Even though her brother-in-law’s son is a younger brother, he is older than my daughter in terms of age. That boy was aggressive and bullied her while walking. My son is already carrying his backpack, but still has to carry his own. That’s it, the other boy teased me while walking, punching, poking and biting again.. But most frustrating is the attitude of the grandmother. My mother-in-law doesn’t care, she still goes as usual. When my son got angry, cried and hit the other boy, my mother-in-law defended him. She pinched my child’s hand and shouted: “You have to give me up. Crying about something. Will you hurry up so I can cook rice?” When I saw that scene, I was shocked and indignant. I rode up in front of my mother-in-law and two young children. Seeing me, my daughter was overjoyed, quickly wiped her tears, repeatedly clapped her hands and shouted “mom, mom…”. I asked why the mother-in-law treated the children like that, and she argued without doing anything. It’s normal for children to fight. But when I raised the red spot on my son’s hand, she turned around and said, “I teach him but he doesn’t listen. Your son is very stubborn. If you don’t teach him, he’ll be bad. And his grandson later asks for help, But when the granddaughter grows up, she will get married…”. I eagerly picked up the child in the car, drove straight home and didn’t say a word to my mother-in-law. Because at that time, I was very angry. If we continue to argue, I am afraid that I will act badly. I brought this story to my husband. He was also very angry, saying that every child is a grandchild, why is his mother so biased. But then he advised me to ignore this, because after all, she is the grandmother of the children and my mother-in-law, we still have to ask a lot. I was angry at my mother-in-law, and my anger spread to my husband. Your mother is so clearly wrong, but you can still say it!

Due to the presence of minerals and other resources on the Red Planet, in the future, Mars could be an abundant source. All in all, the initiatives in this direction are impressive, but as always, there are nuances attached to them. Traveling to Mars on 1,000 rockets and creating land for 1 million earthlings as Elon Musk suggests is an extremely expensive and technologically difficult task. It is not necessary to list all the problems that arise when massive scientific works are devoted to this, just to mention the main “knots”. First, There is no technology that allows the creation of spacecraft with the ability to send people into distant space without having to receive a lethal dose of cosmic radiation. This problem could be solved by wrapping lead plates, but would lead to a proportional increase in the mass of the ship and a decrease in its carrying capacity. New engines were needed, but they are now beyond production. Monday, Solar radiation will remain a problem on the Martian surface. The Red Planet, unlike Earth, does not have a magnetic field that protects us from ionizing radiation. Astronauts will not have to walk on red sand dunes like in the movie “Total Recall”, but have to hide in bases hidden deep below the surface. Tuesday, Mars on Mars is cold and has practically no atmosphere, but the radiation background is 2.5 times higher than what astronauts on the ISS can tolerate. It is impossible to live in such conditions without a special space suit. There are also many other problems, but it is clear that expanding living space is an extremely important task for all of humanity, requiring accumulation and huge investments in technology. For this reason, scientists are seriously skeptical of Elon Musk’s initiative, especially when he proposes to carry out thermonuclear bombardments at both poles of the Red Planet. This will lead to higher temperatures, melting glaciers, the formation of liquid water and the release of greenhouse gases, which will create the atmosphere on Mars. After that, the settlers could walk on the surface without the spacesuit. But there is another way of looking at this “terrain” approach. Mathematician Robert Walker calculates that in order to carry out the first part of the plan, which would require at least 1 million nuclear bombs with a capacity of 100 megatons, they would have to be sent to Mars 3,500 a day for seven weeks to achieve. desired results. There are no such large numbers of nuclear weapons on Earth and the lack of means to deliver them to another planet. This is the first thing. Carbon dioxide reserves on Mars would not be enough to create a suitable atmosphere, even if the first problem were solved. Since the Red Planet has no magnetic field, solar radiation will gradually “suck” in the already formed magnetic field. This is the second thing. And finally, for some reason, Elon Musk doesn’t take into account that after so many nuclear explosions, the surface of the planet will be radioactive for a long time, you can’t walk there with a mask oxygen and plant trees. “Nuke Mars” is just a cover for the US to send nuclear weapons into space? In general, Elon Musk’s initiative is a nonsense and he himself cannot help but understand this. But why is this smart man promoting it? The head of Roscosmos – Mr. Dmitry Rogozin tried to answer the question: Anyone who calls for the “terrain” of Mars or other planets is well aware that this is just an excuse for launching nuclear weapons into space, which, if useful, is just to “terrain”. our “Earth. But it’s true, you can’t just send nuclear warheads to Mars. First, they will need to be put into orbit and accumulate somewhere along with the means to send them in large batches. Where is that? Suppose that a circular orbit station, which the United States and its allies are building, will be adapted for this case, with China and Russia as targets. But will the nuclear bomb then make its way to the Red Planet? It’s long been no secret that Elon Musk is working closely with the Pentagon on the space program and satellites. So why not try with the best cause, Mars exploration, to advocate for the idea of ​​​​putting a US nuclear arsenal in space, Mr. Rogozin concluded.

Tests with neutrobots have been performed quite successfully in mice. It can use intelligent biological camouflage and overcome difficult barriers to get closer to the source of the disease in the body and offer the best treatment. The Preeminence of New Micro Robots Microbots are nothing new, it’s like disguising robots into bacteria or using magnets to move them across blood vessels. But what sets Chinese scientists’ new micro-robot designs apart from the crowd is that it can overcome one of the body’s toughest biological barriers, the blood-brain barrier (BBB) ​​- a single layer. extremely high selectivity protection. Designed to stop pathogens and allow only nutrients to penetrate, BBB is the challenge of micro-robots that the body often considers an outside invader. It is very difficult for micro robots to cross this last line of defense and get closer to the hidden tumors behind it. One author of the above study is Professor Zhiguang Wu at Harbin Institute of Technology specializing in nanotechnology. The new micro-robots, he said, can overcome obstacles that hamper many conventional medical treatments. According to Professor Wu, “the passive diffusion of conventional drugs is subjected to a long, ineffective period of time and blocks biological barriers, which can lead to strong side effects. Meanwhile, the new swimming micro-robot / nano-robot, can move into hard-to-reach tissues using their propulsion, load different drugs and actively swim to diseased sites to transporting drugs ”. This is very important because when it comes to fighting cancer because the more targeted the treatment the better. It is especially true when it comes to brain tumors. Because the tumor is in a difficult position in the brain and BBB’s strong protection, drug treatment can be difficult, and removing the tumor requires brain surgery. Even then, usually only 90% of the tumor can actually be removed. In the past, micro robots were inspired by the way a bacteria or sperm move through the body. All light, acoustics and magnetic fields are used to propel them along the host’s body. Through it, a variety of biomedical tasks can be performed, including cutting the membrane, retaining the distributed drug in the gastrointestinal tract, and distributing the drug through the eye dropper. However, even though the researchers control the motion of these micro-robots more than typical drugs in the body, most micro-robotic designs still face one major hurdle: the body’s immune system, especially BBB. To fool BBB’s defense systems, scientists have designed a new micro-robot that is biologically camouflaged to “sneak through” the fence without being detected. The neutrobots are disguised and introduced into the bloodstream. How does the new micro robot work? The use of self-propelled, drug-dispensing micro-robots could open the door for scientists to get closer and more individual-based access to tumor treatment than oral or given medication. permission before. To treat glioma, a type of brain cancer, in mice, Professor Wu and colleagues have designed neutrobot-based micro-robots that can be controlled with a magnetic field. First, they created nanoparticles from a gel embedded with magnetic iron oxide particles, and the popular cancer drug paclitaxel. Next, these nanoparticles were encased in a disguised E. coli bacterial membrane. Disguised as harmful bacteria, these nanoparticles are submerged by in vitro mouse neutrophils much more easily than the bare nanoparticles that are not camouflaged. The researchers found that the camouflage also prevented drug leakage and made these particles less toxic to neutrophils. The research team tested the neutrobots’ ability to navigate and deliver drugs in vitro. Under the control of a rotating magnetic field, the neutrobots reach a speed of 16.4 µm / second – about 50 times faster than the natural neutrophil. By tracking the neutrobots under the microscope, the scientists can let them travel in complex directions on the artificial substrate. In their trials, the team showed that their neutrobots were able to successfully penetrate mouse BBBs to bring the drug into brain tumors. Despite these successes, scientists still have many things to do before they can be applied to humans. One issue that needs to be fixed, the authors explain, is how to better track each neutrobot as they pass through the body. Right now magnetic resonance imaging can track neutrobot groups as they move but cannot track individuals. “Our research has verified that treatment with neutrobots can prolong survival in mice with gliomas. Therefore, it may not be too long to bring stories about micro-robots in science fiction to reality, ”said Professor Wu.

The starry sky illuminated the aircraft carrier USS Ronald Reagan as it passed through the Luzon Strait. Photo: US Navy

Specifically, at noon, sailors will take a hexagonal glass – a positioning tool that has existed for centuries – to measure the angle of the Sun at its highest point in the day. The data will be fed into a computer program called the Astronomical Latitude and Longitude Estimation System, or STELLA. They also observed the angular distances between the horizon and the Moon, the planets and the stars to calculate latitude and longitude.

On the jetty, a crew consisting of the captain, subordinate officers and the pilot used the above data to control the ship night and day.

The return of astronomical navigation

The Nikkei Asia Financial Times reported that astronomical navigation, or space travel navigation, disappeared from the US Naval Academy curriculum in 2006 because it was deemed obsolete. But in 2015, the school reintroduced this technique as well as sent students to a planetarium to teach how to measure and apply mathematics.

An officer on board the guided missile cruiser USS Mobile Bay uses a positioning device to measure the ship’s position in the Pacific. Photo: US Navy

The return to this method of positioning was prompted by the realization that if the US armed forces increasingly relied on digital communications, a blow to the Global Positioning System. (GPS) – on which this communications system relies on – could make it difficult for the army considered to be the most powerful in the world. That concern is growing in the face of China’s increased electronic and cyber-warfare capabilities.

Peter Singer, strategist at consulting firm New America and author of “Ghost Fleet: A Novel of Next World War” (roughly translated: Ghost Fleet: Novel of the Next World War) commented: “Battle The opening battle of the next great war will take place in silence ”.

According to him, this battle will not be the same as the battle of Pearl Harbor that dragged the United States into the war with Japan in 1941, nor the horrifying battle that opened to the Iraq War in 2003. “It may even have been and is already happening.” Because, in cyberspace, enemy moves still happen weeks, months or years before the outbreak of war.

If digital communications were to be removed, the US Navy would return to the natural world, relying on eyes and ears to survive. Therefore, a return of the hexagonal glass is imperative. But the strategist Singer believes that there are still two other options than this 18th-century utensil.

One is to build a more flexible communications network and improve network security to help the military combat any GPS-related challenges. Second is the development of highly intelligent systems that do not require GPS.

“For example, there is research showing that rockets can fly by navigating against a magnetic field,” says Singer. He equates this with the ability of birds to migrate as they travel thousands of kilometers to reach almost exactly one destination every year.

Answering Nikkei Asia, he explained: “It is not because they remember the way. That’s how they perceive the Earth’s magnetic field. The same goes for insects. So there has been high-tech research on developing digital versions of the way birds and insects navigate.

“Learn” from birds

The Department of Defense Senior Research Projects Administration (DARPA) is pursuing the so-called Adaptive Navigation System. This GPS-equivalent method of positioning, navigation, and time will work even in poorly wave places such as inside buildings, in canyons, in dense woods, underwater and underground. .

In February, a group of scientists including Professor Richard Holland at Bangor University and professor Dmitry Kishkinev at Keele University published a report indicating that birds can possess a “global GPS system. “.

Scientists believe that birds possess a global “GPS system”. Photo: Reuters

“The amazingly precise navigation of these little birds – as they travel alone over stormy seas, across vast deserts, and through extreme weather and temperature extremes – has been one of the the enduring mysteries of biology, ”wrote British scientists for the World Economic Forum.

“An evidence-gathering agency has shown that the Earth’s magnetic field is one of the most likely theories for this mystery. It is thought that the different parameters of the Earth’s magnetic field could form a network of maps that birds will fly with, ”they said.

“If birds know that magnetic field strength increases as they go north, they will be able to detect their position on the North-South axis wherever they go,” the report said. said the report. This means that the birds are essentially navigating using a system similar to Cartesian coordinates – the basis of modern GPS navigation.

Nikkei Asia asked Holland if anything from bird navigation could be used in the military. “In theory, the Earth’s magnetic field could be used as a positioning system,” he said. However, he warned: “It is not clear whether this system can be used on a global scale as GPS could, since there are several locations on Earth that share the same characteristics. magnetism”.

However, this could be the answer the US military is looking for in its mission to protect against electronic warfare by China or other countries.

Billy Fabian, an expert at data and analysis firm Govini and a senior colleague at the Center for New American Security, says it’s important to prepare for the scenario where communications are disrupted. when considering the nature of a potential war with China.

“A future conflict between the US and China will be different from past conflicts in two respects,” he said. One, every sector will be highly competitive, and that’s different from what we’re used to. Second, we will be under enormous time pressure. Most of the places that you can imagine we will fight in the future are in the backyard of China, but one ocean away from the American continent.

The US military is also practicing the concept called “mission command”. Accordingly, the commanders at the front lines are empowered to plan, coordinate and execute decisions without having to ask for instructions from their superiors. In this way, small units can continue to operate even when communication is interrupted.