Create a clean path from the speaker to the listener’s ear The perception of stereo sound depends on subtlety and in particular on the presence of live sound as well as the immediate feedback that follows. Incoming sounds play a general role in what you’re hearing, but they’re not as important in stereo as the “first-in” effect (the latter is considered unimportant by the ear/brain’s decision). spatial and positional information). Now do you understand what we mean by “clean road”? You don’t need anything on the floor or anything else close to the path from the speakers to where you sit. The floor and ceiling of the listening room should be flat and smooth because high frequency reflections will be minimized. If the ceiling is not very high, it is better if it is made of a soft and smooth object. The problem here is that rough materials, such as appliances and furniture, will cause the sound to be distributed unevenly. This is one reason why the stereo effect is blurred and the ideal performance cannot be obtained. A friend in the test room asked me to close my eyes to test the change of stereo sound when there is an obstacle in front. When the music plays, I feel the change quite clearly, the stereo comes out in parts, becomes distracting and the sense of space is seriously affected. Then my friend told me to open my eyes. What surprised me the most was that he just silently placed the CD cases on the floor symmetrically between the speakers and a few in front of us. This is obviously not a huge physical change, but it does sabotage stereo performance a lot. So what if you put a coffee table or put a few remotes on it symmetrically with two speakers and in front of a music chair? Maybe it will be convenient for you to enjoy the melodious music while sipping a cup of coffee, but you will certainly not be able to fully feel the stereo performance. Get rid of objects next to you, use a chair with a low back Although using a chair with a low backrest, the arrangement of the chair as shown in the picture makes it impossible for both listeners to experience the stereo effect. Hard objects near your ears along a straight line are seen to greatly affect when you listen to music. It’s best to sit in a chair with a very low back, as that will put nothing near your ears. If your back doesn’t adapt to this, you should at least use a chair that doesn’t go over your head and make sure it’s soft. Hard leather sofas become weak points because they reflect high frequencies. If you are sitting alone, cover the area behind and near your head with a cloth curtain. Because otherwise, a lot of high frequencies will be scattered before reaching you, or in other words, the back wall of the listening room should design sound-absorbing materials or accessories. But using a low chair is still best. Try it! You will be surprised how much better your system will sound. Symmetry rule Stereo sound is based on symmetry between two channels. For the latter, where people are exposed to large amounts of treble diffusivity, the role of symmetry is diminished. But for anything that comes first with the sound of low frequencies, the role of symmetry is indispensable. In the old days, when many audio players didn’t understand how stereo really worked, and especially didn’t fully appreciate the importance of the intrinsic tonal time difference, many would try to make adjustments. difference between the two channels by electronic means, i.e. adjust the equalizer and use a separate equalizer for the channels. The result was, of course, a disaster, because analog equalizers and EQs couldn’t deal with asymmetric timing effectively. When that happens, the actual digital signal processing (DSP) may be full of detail, but the problem lies in the accuracy. So it’s better to make the whole system as symmetrical as possible from the start. As always, the tuning DSP room works best when there is a lower frequency response peak and sag and is less demanding for correction (the one exception is the very wide, very useful bass correction. useful in practice). Part of the task of symmetry is on you, which is to keep the two speakers evenly spaced. In general, everyone does this, but they don’t do it fully and carefully. Let’s take a quick look at the numbers. People can hear a time difference between the two ears of about 1/100,000 of a second. But let’s stay conservative and give it only 1/50,000th of a second. How far will the sound go in 1/50,000th of a second? Well, a millisecond (1/1000 of a second) is about a footstep. So 1/50,000 is about 12/50,000 feet, which is about a quarter of an inch. So if you want stereo speakers, you need to get them within a quarter of an inch. Time is a measure! Mark the spot and keep it there. Sit near your speakers loa There will always be some sound coming soon that you really don’t expect. So try to make them symmetric and have smaller amplitudes, but there are bound to be some limits. The way to minimize their effects is to make the live sound appear as early as possible. Sitting close to the speaker is how you do this. Of course, you also can’t sit too close, because most speakers depend on a certain distance for the accuracy of the drivers. And to some extent, you need some distance to avoid hearing the microscopic vibrations because that can make the speaker more visible than the music source. But you’ll get the best stereo sound if you sit reasonably close to the points. Many people sit too far and to the far end of the room due to the fact that the music room is too long. Sitting closer to the speaker changes the direct sound reflection ratio. You should also sit away from the wall behind your back, and the speakers should also be away from the wall behind them (unless they are designed to be wall-mounted), because positioning the speakers and listeners too close to the wall will cause discomfort. benefit the sound of a stereo system. Need a soft room Many recordings (CDs or LPs) are made with the expectation that some room sound will be added as the music plays. A few other recordings were made with the expectation that they would not be echoes when heard. But all those effects don’t stand a chance if your listening room is too small. In my opinion, the best stereo sound should be presented in an RFZ (no-reflection room) room. In such a room, early incoming direct sound will be in moderation, and sound reflection will soon be absorbed. After you hear the live sound, the listening room will appear to be assisted by sound diffusion, where discrete sound reflections are not evidence, or the sound will arrive too late after the initial sound. arrived. As a result, live sound is heard more clearly, without being confused. While building an actual RFZ room is quite a challenge, you can handle it well by making a “soft” listening room, which will especially help the treble get the most out of it. In addition, a soft acoustic environment will also result in more harmonious notes. If your music room has a large picture, use fabric drapes to cover it while listening to music. In particular, the wall of the music room made of glass would be a disaster. A few years ago, a friend brought to my apartment a system to edit rooms. Then this apartment had a spectacular view, located on a high ground and had a long wall of nothing but glass and steel support. But when it comes to music, it’s clear this room can’t get the most out of it unless I add some curtains. Sit still and close your eyes Part of that symmetry is placing the music chair in the right position. Unless you move the seat straight forward or backward, you will end up in an asymmetrical position! But there is another way of sitting that is really subtle and more important than the effect. This is a complex topic so I can only give an overview. As the brain builds perception from raw data during processing, what we “see” or “hear” is not the same as light in our eyes or sound in our ears. Because it’s just a mental construct. This particular mental construct often includes the following surprising things: it will use many signals, but if one signal is lost, the brain will recognize it as lacking and simply reprogram itself to use other signals. This may sound crazy, but there’s a simple visual experiment you can illustrate with that principle. Look at a photograph with a lot of three-dimensional (3D) material in it or at a painting with strong perspective, then you will get some impression of a three-dimensional image. But if you look at them with one eye closed and the other through a short tube that blocks the background and only allows you to see the picture, there is a surprising increase in the perception of three-dimensional images. If you’ve never tried this, you’ll have a hard time believing that your eyes can see the background around the picture of the picture (the way you usually look at a picture), and the brain will pick up some signal about the picture. that three-dimensional perspective. But the brain will also receive information that the surface of the painted or printed picture is in fact only two-dimensional. Binocular vision shows a fatter picture, and the background shows it too. So the brain is getting conflicting signals, which means it allows you to see some of the three-dimensional image, but not all of it. When you look with one eye and don’t see the background, the signal to that fatter image is blocked. Going back to the world of sound, one of the ways the brain detects the position of an object, the shape of the hearing room, of space, or in general auditory terms, is to slightly move the head and Notice the changes in the sound. People will have the feeling that they suddenly “sink into” the space of stereo sound. There are some people who choose to sit absolutely still. This will put the listener in a quiet state, and obviously very suitable for listening to music. And, to my ears, the stereo got better. Finally, closing your eyes also eliminates cues that a person can’t hear in a concert hall or a stadium, but can hear from the speakers in your listening room. In short, sit with your eyes closed, with your head completely still, in a chair near the speakers in a “soft” room and in the correct symmetrical position with no obstructions in the line. between you and the speaker. If you do all that, I guarantee your stereo system can perform at its best. Hope you find the best stereo sound!

The US has a rather slow 5G rollout. Photo: NetEase Since the advent of 5G technology, US carriers have been slow to deploy 5G networks. The main reasons are limited spectrum resources available for 5G, cumbersome deployment of 5G devices, and lack of killer applications for 5G services. The media often uses words like “fast” to describe 5G speeds, but the speed of 5G wireless network rollout in the US has nothing to do with the word. Over the past three years, the prospect of 5G wireless networks has been the focus of major media reports. But for most Americans, the real 5G that can achieve the desired effect is yet to emerge. Although all the major wireless carriers in the country claim that their 5G services have covered the entire US, industry analysts argue that this so-called 5G service is not much different from the US. 4G. According to market research firm Evercore ISI, most Americans may not enjoy 5G service that is significantly faster than current wireless communication networks. “Overall, it is expected that between late 2021 and late 2023, truly better 5G services will cover two-thirds of the US population,” said James Ratcliffe, an analyst at Evercore ISI. The first batch of mobile phones that support 5G networks was launched in mid-2019, according to Ratcliffe, in the most optimistic scenario, wireless network operators will be able to provide “real” 5G services to 2/3 of the US population in the next 30 months. Meanwhile, the first mobile phone to support 4G network was released in 2010, and the US 4G network was basically rolled out 18 months later. Analysts, academics and former industry executives say a combination of factors has resulted in a relatively slow rollout of 5G networks in the US. Some of these problems are related to network infrastructure: high-speed network transmission frequency bands and signal coverage are limited. Moreover, the new network equipment that needs to be on the shelves to deploy 5G networks is relatively cumbersome. In addition, many new devices are not made in the US, so the time to purchase the device will be longer. Industry observers also point out that the current 5G network still lacks breakthrough applications, and cannot stimulate user demand and promote the spread of services such as mobile video in 4G networks. John Roese, chief technology officer of Dell Technologies and a former executive at companies like Huawei and Nortel, said that although wireless operators have recently invested billions of dollars in 5G networks, when Because their revenue in 5G-related businesses is not stable, they may not be able to accelerate the construction of new networks. According to Mr. Roese, wireless network operators have had disappointing returns when investing in 4G networks. He said that the main beneficiaries of 4G networks are technology companies that provide applications and other services through the network. “So wireless operators are very cautious about this.” Limited frequency range Photo: Sina To meet the large traffic that 5G networks have to transport, carriers need to open “highways” for data. The spectrum is similar to the real estate that the government grants to carriers through auctions to build highways. The more land they have, the more lanes they can open for faster 5G and easier access. Currently, 5G networks mainly transmit data through low-band, mid-band and high-band. High-band (mmWave) aka millimeter wave has the highest data transfer rate and largest bandwidth, but the smallest coverage. Low band has wider coverage but slowest transmission speed. Finally, the mid-band is considered to be the balance between coverage and transmission speed. Companies like Verizon, AT&T, and T-Mobile all claim that their 5G networks now cover more than 200 million Americans, enough to meet US demand. However, most of these networks rely on low-band radio waves to complete coverage, and network transmission speeds are limited. Wireless network operators are currently focused on capturing mid-bands and have invested a lot of money in recent tenders for these resources. But the main problem facing these companies is that most of the mid-band bands have been occupied by US government agencies and other agencies, mainly for military communications and meteorological services. . Until now, wireless network operators could only use a fraction of the mid-band resources. US government agencies are also aware of the lack of mid-band resources. Earlier this year, the US auctioned a total of $81 billion in mid-band licenses, and plans to hold another auction this fall. When operators were preparing to roll out 5G nearly 10 years ago, they generally believed that 5G networks would primarily use high-frequency radio waves, said Stefan Pongratz, analyst at Dell’Oro Group. . This portion of the spectrum resource is essentially unused. But Pangraz says that rolling out a 5G network using millimeter waves requires building more base stations, which will certainly take time to increase deployment density of base stations. He said that until recent years, the US turned its attention to mid-band radio waves as a way to roll out 5G networks faster. Where is the profit point? Photo: Justin Hall Comics Brian Kelley, an associate professor of electrical engineering at the University of Texas at San Antonio, said the lack of disruptive applications is another major factor hindering the rollout of 5G networks. Mr. Kelly, who was an engineer at Motorola, said: “It can be said that this is the biggest factor that can stimulate the speed of 5G deployment.” According to analyst Craig Moffett, the 3 main advantages of 5G networks are faster data transmission (100 times faster than 4G), support for a large number of simultaneous connections, but also significantly improved response speed between devices. device is connected. “There isn’t a single revenue model that can combine these three advantages. It’s not even clear if consumers are willing to pay more for faster video downloads,” Moffett said. Moffitt said that because 5G networks can seamlessly connect sensors and other IoT devices, companies will likely be the first adopters of 5G services. He said that 5G networks “can be considered the next generation of Wi-Fi wireless networks, which are faster, more secure and can connect more devices”. But Moffett said the question is: “Will wireless operators build their own 5G networks for enterprises, or will the enterprises themselves deploy them?” This is important, he says, because if businesses choose to deploy their own 5G networks, wireless operators may lose the associated revenue and not be able to invest more money in building infrastructure. 5G layer. Device problem Currently, in the world, there are 5 companies that have successfully produced network equipment for 5G, none of which is in the US. Photo: Sina 5G networks are very different from 4G, in part because 5G networks need to transmit data at a higher frequency band. This means that upgrading 5G networks requires different technologies and devices. Evercore analyst Ratcliffe says installing new equipment can require finding a suitable location, obtaining the right permits, and even digging up roads and laying fiber optic cables to transfer data at high speeds between base stations. Gazzola, chief executive officer of Atlanta-based infrastructure company Bennett & Pless, said it is expected that by 2022, the construction work needed to bring wireless communication networks to 5G standards will increase. . However, the epidemic and technical obstacles have delayed progress. Equipment availability is also a common issue faced by wireless network operators. Dell’s Rose said that when 4G was first introduced around 2010, there were about a dozen technology vendors offering wireless networking equipment, including Canada’s Nortel and America’s Motorola. Today, there are only five major players in the global network equipment market: Nokia, Ericsson, Samsung, ZTE and Huawei. “Two in China. One in Finland, one in Sweden and one in Korea.” These suppliers are all located outside the US. Worse still, 5G network equipment requires computer chips while the chip industry has been struggling recently to cope with supply shortages.

The commander of the Metrology Center exchanged experiences in testing optical equipment with a team of officials and engineers. (Photo taken on April 21, 2021). After “realizing the market” in a number of departments and divisions of the CLC, we gradually envisioned the mission of the center. Formerly the Center for Calibration and Metrology, established on May 29, 1981, the TTL now has the function of advising and proposing on the implementation of metrological assurance; standard keeping, maintaining traceability, and transmitting metrological standards in the military. It is worth mentioning that metrology is a specific technical specialty, while the military does not have a formal training school for metrology officers and employees. In order to solve this difficulty, the officers and employees of the CLC are given all conditions to study and improve their qualifications, from participating in metrology engineering conversion courses to postgraduate study at technical schools in Vietnam. and outside the military. As a result, up to now, the staff of CLC has more than 90% of university and postgraduate degrees, the proportion of post-graduate accounts for 40%. In addition, over the past 40 years, the center has participated in 37 training courses for metrology engineers at the Military Technical Academy, creating a core force to deploy measurement work in units throughout the army.. . At the Optical Standardization Department, Colonel Pham Chi Trung, Head of the Department shared about the department’s tasks and quality of human resources: “The department’s mission is narrow, specialized, highly dual-use, equipped with equipment. It is modern and meets the development trend of the army. Therefore, according to the general policy of the center, the training and training of human resources is very focused. Currently, more than 70% of the staff of the department. have a master’s degree”. Thanks to high-quality human resources and in-depth investment with hundreds of new standard measurement devices, TTDL has gradually improved its standard capacity and capacity for testing and calibration, including the fields of These areas have been raised to national level, such as: Radio power measurement, pressure measurement, time frequency measurement, optical measurement… In the past 5 years, the center has ensured the connection benchmarking for nearly 50,000 measuring devices of units in the whole army, many of which are difficult and high-precision measuring devices of modern straight forward units; organized more than 250 mobile tests, ensuring standard linkages for more than 3,000 standard samples, high-precision measuring devices for units in the Northern region and some units in the Central and Southern regions. With the motto “Access to the latest technology, directly serving the task of keeping standards and transmitting standards”, over the years, TTG has implemented many scientific topics, tasks, and technical improvement initiatives (Science and Technical Innovation). ) contributes to improving the efficiency and quality of performing the task of ensuring and maintaining standard links for the whole army. In addition, the center has deployed dozens of technical and technical skills every year, effectively applied in the process of performing tasks, with many initiatives winning the National Innovative Youth Award. Referring to the big goals that the center strives to accomplish, Colonel, Dr. Le Duy Quy said: The Center determines to concentrate all resources to successfully implement two breakthroughs: improving the quality of internal training. meet the requirements in the new situation; promote the application of information technology in the task of keeping and transmitting standards, management and administration. In the immediate future, it is necessary to promote research and construction, and propose to equip automatic systems in testing and calibration of measuring instruments; research and apply advanced measurement methods, evaluation and testing methods to new-generation measuring-testing and technical equipment, and at the same time improving next-generation measuring-testing equipment. old, in order to effectively serve the assigned political tasks.

Anker launches second-generation GaN charger that can charge MacBook Pro M1. Photo: Anker GaN is the breakthrough that allows Anker to create powerful fast chargers in a smaller size. In contrast to silicon, which is commonly used in most chargers, GaN provides an efficient way to disperse heat, allowing the charger to operate safely at a faster rate. Nano II Series includes 30, 45, and 65 watt chargers with the same design but only varying in size each, which are smaller and faster charging options for consumers. Each comes with a USB-C port and Anker’s PowerIQ 3.0 technology that charges devices up to 3x faster than a 5W power bank and is compatible with Samsung’s super fast charging. Among the charging models, it is worth noting the 65W Nano II charger, this is a charger with outstanding power, it can charge most smartphones on the market, tablets or laptops. USB-C. This charger can also charge Macbook Pro M1 at full speed. Some devices can use the Anker Nano II charger. Photo: Anker GaN II technology was developed using Power Integrations’ InnoSwitch 4 and Anker will be the exclusive partner for this technology. InnoSwitch 4 is a powerful 750V voltage-coupled, high-frequency flyback switch that utilizes Power Integrations’ PowiGaN technology. Balu Balakrishnan – CEO of Power Integrations said, integrating the InnoSwitch 4 chipset in the Nano II charger will bring a compact, attractive design and high efficiency during use. The GaN Nano II charger is now available for pre-order via Amazon and on Anker’s site. The 30W version is currently priced at 30 USD, the 45W version is 36 USD and the 65W will be ordered for about 40 USD.

55ZH6M Nebo-M radar station of the Russian military. Photo: Russian Ministry of Defense Yan Noviko, General Director of Almaz-Antey, said at a forum on new technology in Moscow on May 23: “The Nebo-M radar system is the ‘killer’ of stealth technology. Radar can detect F-22, F-35 relatively easily. Mr. Niviko also said that Almaz-Antey is capable of producing about 30 types of mobile multi-purpose radar, thanks to proper investment in research projects as well as new technology. 55ZH6M Nebo-M is the latest Russian radar, designed and manufactured by the Nizhny Novgorod Radio Engineering Research Institute (NNIIRT) of Almaz-Antey. Along with the Container radar, the Nebo-M surveillance station is considered the backbone of the battlefield radar network on Russia’s land borders. So far, 55ZH6M Nebo-M has been deployed in all the most important directions in Russia. The first Nebo-M complex was delivered to the Western Military District in 2017, followed by combat units stationed in Transbaikalia, Khabarovsk and Primorye. A year later, this advanced radar network was deployed in an air defense unit based in Crimea. The portable Nebo-M system can be rapidly redeployed to other locations by land or air. The new Nebo-M series is capable of detecting aircraft and ballistic missiles at a distance of up to 1,000 km, a big step up from the early Nebo radar systems developed under the Soviet Union. This radar station operates on the principle of active electronic scanning, making the 55ZH6M Nebo-M capable of resisting enemy jamming. When specifically installed to track targets at medium altitudes, Nebo-M radios are sometimes equipped with low-altitude radar systems like the Podlet-E. Is it really something to worry about with US stealth fighters? TASS news agency (Russia) quoted Noviko as saying that stealth technology does not cause difficulties for Russia’s new radar complexes. In theory, this is true, because VHF high-frequency radars like the 55ZH6M Nebo-M can identify an F-35 or F-22 in flight. American stealth fighter F-35. Photo: Reuters American experts say that there are many things to confirm in the Russian statement. Identifying a new target is the first step and part of the process of catching and killing the target with many stages. After locating the target, for example the F-35, the requirement for the radar station is to fix the target, track, and “catch” successfully before transferring the parameters to the unit tasked with destroying the target. target. According to General Dan Flattley, a former F-35 pilot of the US Air Force, in order to destroy the F-35, Russia must build a chain of target destruction. This task is usually performed by Russian anti-aircraft missiles, such as the Russian S-400 defense system. Until now, whether the S-400 is capable of destroying the F-35 or F-22 stealth fighters is still a subject of debate. Technically, it is clear that the 55ZH6M Nebo-M watchdog can identify the US 5th generation fighter. But that’s only part of the battle sequence. Locating is one thing, but whether Russian air defense systems can destroy the F-35 and F-22 is another story, because many factors are involved. If “detect” but not have the ability to “precise attack”, the radar’s performance does not make much sense. US stealth technology only needs to overcome the “destroy” limit of Russian missiles to be considered successful.

To deal with AMD, the 11th generation Intel H-series mobile processors are manufactured on the 10nm process, support up to 8 cores and 16 threads, support video memory direct connection technology and PCIe 4.0 technology with “5GHz high frequency”. Power consumption of Intel’s H45 processor is divided into 2 levels, OEM manufacturers can choose 35W or 45W version depending on needs. All systems are equipped with 32cu Xe cores as standard and the operating frequency is 1450MHz. The H45 product sequence and general specifications are as follows: i9-11980HK: 8 cores 16 threads, 2.6GHz base frequency, 2 cores / 4 cores / all-core boost frequency 5GHz / 4.9GHz / 4.5GHz, 24MB L3 cache; i9-11900H: 8 cores 16 threads, base frequency 2.5GHz, 2 cores / 4 cores / all cores Boost frequency 4.9GHz / 4.8GHz / 4.4GHz, 24MB L3 cache; i7-11800H: 8 cores 16 threads, base frequency 2.3GHz, 2 cores / 4 cores / full core Boost frequency 4.6GHz / 4.5GHz / 4.2GHz, 24MB L3 cache; i5-11400H: 6 cores 12 threads, base frequency 2.7GHz, 2 cores / 4 cores / all core Boost frequency 4.5GHz / 4.3GHz / 4.1GHz, 12MB L3 cache; i5-11260H: 6 cores 12 threads, base frequency 2.6GHz, 2 cores / 4 cores / all cores Boost frequency 4.4GHz / 4.2GHz / 4GHz, 12MB L3 cache. The H45 series processors have 20 PCIe 4.0 channels, integrated Thunderbolt 4 technology, and support for the Intel Killer Wi-Fi 6E wireless network card. It also has dual eDP outputs to optimize power consumption. The former direct connect technology of processor video memory is also present on the H45 series, allowing the processor to access all data in the onboard video memory at once. In addition, the memory frequency support of the H45 processor reaches 3200MHz. The most advanced version, 11980HK is a version that can be overclocked freely. You can customize how often it works using the Intel XTU software. Intel says the H45 series processors support the latest third-party discrete graphics, supporting either FHD 360Hz displays or 4K 120Hz displays. The single-core performance of the new generation of Tiger Lake-H processors can be up to 19% higher than the performance of Comet Lake-H. This is the most powerful processor for laptops. When compared to AMD, Intel claims that the gaming performance of laptops equipped with the new H45 is 20% higher on average than AMD when all systems “maximize performance”. Ingel says there are already more than 80 high-performance laptops that will use the H45 series processors. Intel also shipped 1 million H45 series processors to OEMs during the launch. Most laptops equipped with the H45 series will be revealed soon. According to Zaeke

However, a Huawei PR officer told the Global Times on Saturday that he has not received such information. China Mobile declined to answer the Global Times when asked. Ma Jihua, a senior analyst in the tech industry in Beijing, told the Global Times that the move to use satellites is natural as Huawei pushes up the layout of 6G networks, 50 times faster than 5G. Compared to building 5G networks that rely on base stations to transmit signals, 6G networks transmit higher frequencies, needing to use satellites for communication instead of base stations where there will be low penetration capacity, Ma explain. Illustration. Huawei’s rotating chairman, Xu Zhijun, announced at Huawei’s global analysts conference earlier this month that the Chinese tech giant will launch its 6G network by 2030 at the same time soon. Release of 6G white paper to explain what is 6G industry. In fact, in 2019, Huawei proposed launching more than 10,000 small satellites to provide 6G services worldwide, during the global 6G summit. China has made the biggest 5G footprint worldwide and is likely to go further in 6G development with efforts from giant Huawei, which has 5G technology outperformed. rivals and also leads in research and development 6G despite the US causing difficulties. According to Ma Jihua, the potential of 6G technologies is something no government or company can ignore despite the fact that it is still in the early stages of research and development. Satellite communication has shown increasing importance since last year with the proposal of new infrastructure. Ma Jihua also noted: “We need to know how to communicate in a satellite constellation as the country pushes forward with technology development along with Huawei’s new 6G satellite moves even though both use satellites.” China’s satellite constellation, such as the current projects in which Hongyun and Hongyan have been involved, aims to make online access available to residents and businesses in remote and remote areas in China. While the 6G satellite is used more widely for testing and data availability in popular metropolitan areas, Ma added. It is known that at the end of last year, China launched the world’s first 6G test satellite from the Taiyuan Satellite Launch Center in Shanxi Province, North China, marking a breakthrough in public discovery. terahertz space communication technology of China.

Chest patting is a means of communication However, recently a new study has revealed that gorilla clapping behavior is not quite as we know it. Research published in the journal Scientific Reports concluded that gorilla clapping was in fact a means of non-verbal communication that “encoded” their competitiveness instead of boasting of strength. The gorilla clapping itself represents an interesting kind of communication unlike a human. It is not really a voice but an act of inclination to show off visible and audible physical strength. To draw conclusions, the researchers sought to record the sound of the chest beating using photometry. With this method, scientists do not need to get close to the gorilla because the extremely powerful male monkeys pose many dangers in Volcanoes National Park, Rwanda. However, even using photometry, scientists still need to be in the right place and at the right time to catch chest beats from gorillas. The results showed that sounds had lower frequencies in large male mountain gorillas, while younger males had higher frequency sounds. Where low-frequency sounds travel further than high-frequency sounds, which means that larger males can be more formidable competitors. This is useful for males of similar or smaller size who can use the information to decide if it is worthwhile against the competitor or to step back. In previous research conducted by the same group of researchers found that the larger male mountain gorillas not only were socially dominant, they were also more likely to reproduce successfully than the offspring. the male is smaller. With female monkeys, they will also collect information from the male monkey’s chest pounding sound to decide on a worthy mate. “The gorilla’s chest banging is one of the iconic sounds of the animal kingdom, so it’s great that we can prove that gorilla’s body size has been encoded in the displays. This spectacular performance, “said Edward Wright, author of the study from the Planck Institute of Evolutionary Anthropology. Critically endangered species on the Red List Gorilla is a genus of primates belonging to the family of humans, herbivores living in the jungles of Africa, the largest of the extant primates. Gorillas are divided into two species (there can be 4 to 5 more subspecies). The DNA of the gorilla is the same as that of humans 98% -99%. They are very closely related to humans after only 2 species of chimpanzees. This primate has a massive body. Gorillas are 1.7–2 m tall when standing upright and weigh 180–200 kg. These animals usually walk on all fours, although they can stand on two legs. Gorilla lives in the tropical and subtropical forests of Africa. Gorillas move with their knuckles, although they can sometimes stand upright with food or on defense. Wild adult gorillas weigh 135 to 180 kg (298 to 397 lb) while females are usually half as much as 68–113 kg (150–249 lb) males. Adult males are 1.7 to 1.8 m (5.6 to 5.9 ft) tall, with an arm span of 2.3 to 2.6 m (7.5 to 8.5 ft). Females have a shorter arm span. The adult male gorilla is known as the “silver back” due to the silver hair on its back. Occasionally, a silverback greater than 1.8 meters and 230 kg is recorded in the wild. The obese gorilla in captivity 270 kg. Gorillas live in groups under the command of the strongest and most powerful male. It is the male’s duty to lead and protect the whole herd from being attacked by wild animals. The gorilla’s most dangerous enemy is the very ferocious leopard. When threatened, the male will stand upright and pound his stomach with two hands to warn him before fighting. The gorilla is known as a powerful beast with a large appearance, much stronger than a human, powerful and intelligent hands and a gorilla punch that can make everything facing a deformation. . Despite its massive and massive body, Gorilla has an average running speed of about 40 km / h. All species (and subspecies) of the gorilla are listed as Critically Endangered on the IUCN Red List. Now, more than 100,000 western lowland gorillas are thought to exist in the wild, with 4,000 in zoos; The eastern lowland gorilla has a population of less than 5,000 in the wild and 24 in the zoo. The mountain gorilla is the most endangered species, with an estimated population of 880 remaining in the wild and no species in the zoo.