transtargear

header-right

Main navigation

technology

by

Why OLED screen phones can cause eyestrain and headache?

Sometimes you experience eye strain, headache, for too long looking at an OLED screen, possibly due to something called Pulse Width Modulation (PWM). This article will help you better understand it.

OLED technology is widely used on smartphones for many advantages, such as dramatic contrast, deep blacks, thinner and lighter LCDs. However, OLED screen phones are using the method of reducing screen brightness as Pulse Width Modulation (PWM).

This is different from LCD screens that use DC dimming, and it makes some users feel uncomfortable. So how are they different? Why is PWM annoying a small group of us and DC dimming is not?

How does PWM work?

This technology simply means changing the width of the light pulses, thereby increasing or decreasing the screen brightness. The frequency of light pulses is often very high – 200Hz and above – making it impossible for the human eye to recognize each individual pulse. Therefore, we will receive the average amount of light that these pulses emit.

The state of the screen turned off or on is actually determined by the amount of light it receives. When you reduce the screen brightness, in fact, the off state lasts longer than it turns on, the amount of light generated by the pulses decreases so we think that the screen is darkened.

At 100% brightness, you notice it’s always bright because the pulse is at its widest. When reduced to 50%, the panel emits shorter pulses, divided into intervals that reduce the amount of light received. And if you continue to lower the brightness, the pulse amplitude will be shorter, the screen stays longer. At extremely low brightness levels, the spacing between the pulses is large enough for them to be discrete and visible to the human eye. At this time, flicker occurs.

Most people are not sensitive enough to recognize this screen flicker. Only a small group felt uncomfortable, although they did not know where the cause was. With this group, flicker for a long time makes the eyes faster tired, headache or migraine. Especially with the habit of using an OLED screen smartphone in low light conditions, or at times when the eyes should rest – for example, before going to sleep – is not as good.

 

 

 

 

 

 

 

 

by

Why don’t commercial planes fly higher into space?

The higher the flight, the more fuel-efficient the aircraft is, the faster and quieter it flies. But they can’t fly into space because of some design limitations.

According to ScienceABC, commercial aircraft usually fly stably at an altitude of 10,700 m above the ground. This is considered the ideal height to help airlines save money, fly faster and safer.

There are three main reasons for this.

The higher the flight, the thinner the air density. This helps reduce the drag of the aircraft. Besides, the air pressed down into the fuselage is also lower than the lifting air.

At the same time, the aircraft must also move faster to gain additional lift of the air. So when traveling at high altitudes, the aircraft will consume less fuel and fly faster.

Because of some design limitations, civil aircraft cannot fly into space.

Another reason is comfort. An aircraft can fly at altitudes of 10,700 – 42,000 m from the ground. Weather phenomena are most influential at altitudes of 0-10,700 m.

If flying at this altitude, the aircraft will not be affected by such turbulence weather. This helps passengers experience a softer and more comfortable flight.

The last reason is for everyone’s safety. In case the aircraft is at an altitude of 11,900 m and something happens to the engine, pilots will have more time to troubleshoot and contact the operating center before an emergency landing.

Most modern aircraft have very good incident response systems. People often think that when the engine is broken, the plane will free fall. But the truth is not so. The plane will hover forward.

Air turbulence due to terrain will not impact the aircraft if it reaches a safe altitude.

With each drop, the aircraft will hover 16-17 m to the front. Thus, from the time of engine failure at an altitude of 10,000 m until landing, the aircraft can go another 160 km.

This allows the pilot to fly the aircraft to the nearest airport for an emergency landing. Thus, flying higher will help the aircraft save, safer and faster.

Besides, flying at an altitude of 10 km above sea level will prevent the aircraft from hitting birds in the sky. Civil aircraft models can reach speeds over 900 km / h. Striking a bird could be equivalent to hitting a flying bullet at 1,220 km / h.

 

 

 

 

 

 

by

Apple devices achieves the highest customer satisfaction score

No product line is enough to beat Mac and iPad in terms of customer satisfaction in the PC and tablet market in 2019.

That is the result of the new data published today by the American Customer Satisfaction Index (ACSI).

In the Household Appliance and Electronics Report 2019 (Apple and electronics reports), Apple scored 83 ACSI, which is on par with it achieved in 2018. Apple’s overall satisfaction score is higher than Samsung scores (81 points), Amazon (79 points), HP (78 points), Acer (77 points) and others you can see in the table below:

According to the ACSI report: “According to the overall industry ranking, Apple ranked first for the second consecutive year with a stable and fairly high score of 83, and its customers so far have had expectations. Despite dropping 1%, Samsung still holds the 2nd position and is no longer in harmony with Amazon, which has dropped to 3rd. Amazon dropped 4% to 79, only 1 point higher than the industry average. Of the top three, Apple shows superiority in all aspects of the customer experience, but still lags behind Samsung and Amazon in value. ”

ACSI says that Samsung is the industry leader when it comes to the desktop segment, with Apple in second place, but Apple devices win in the laptop and tablet segments, resulting in a high overall score. Best for this brand.

Like last year, Apple achieved the highest rankings for everything from device design, to existing features and applications.

In terms of overall customer satisfaction, desktop PCs, notebooks and tablets still lag behind overall smartphone satisfaction, but among the larger devices, desktop computers have the highest level of customer satisfaction. .

It is known that in order to create a scoring system and give scores for such devices, ACSI used data from interviews with approximately 300,000 customers, thereby analyzing customer satisfaction for hundreds of companies in dozens of different industries.

 

 

 

 

 

 

 

by

Many restaurants in China are using serving robots (Part 1)

Serving robots have become an attractive option for restaurants in China as recruitment of waiters has become increasingly difficult.

Two years ago, Bao Xiangyi dropped out of school and waited in a restaurant for half a year to support himself, and the 19-year-old recalled that time in a difficult and obsessive way.

“It’s crazy to work in a number of Chinese restaurants. The number of my daily steps WeChat measured reached 20,000 steps in just one day, just taking food inside the restaurant alone.” , Bao said.

And this made him quit the waiter job and decided to go back to school, he is now a university in Hangzhou, Zhejiang province.

Serving robots developed by Pudu Tech, a startup in Shenzhen, have been adopted by thousands of restaurants in China, as well as several other countries including Singapore, South Korea and Germany.

“I cannot accept that 365 days a year would be like that,” Bao said. “Those days were filled with darkness and I felt like my whole life would forever be a lowly and mediocre servant.”

Olivia Niu, a 23-year-old Hong Kong resident, is also a good example. She quit the waitress job right after the first day of work. “During the peak hours, the work will be very busy, even though I am very hungry, but I still have to try to prepare meals for customers,” Niu said.

The service robot was developed by Pudu Tech, a three-year startup in Shenzhen

Becoming a waiter has never been a top career choice but it is still a great source of employment in China. Yang Chunyan, a waitress at Lanlifang Hotel in Wenzhou, southeast China, had two children and said she chose this job because she needed to make a living.

The young generation of China today has a bigger vision and understands more of the field. Among those born after 2000, 24.5% wanted a career related to literature and the arts. Next is education and IT industry in second and third place, according to aggregated information from Tencent QQ and China Youth Daily.

This makes it difficult for Chinese executives to recruit qualified staff, and even if so, very few people can withstand the daily pressure of hundreds of food orders. , so the best option is probably robots.

 

 

 

 

 

 

 

 

 

by

Impressive technology applications in sports at CES 2018

Assistive technology applications in the field of sports made a strong impression at CES 2018. Let’s take a look at some interesting inventions at CES 2018.

World boxing champion Floyd Mayweather has just launched a boxing training system based on VR technology. Using this system you can battle with boxing champion who has never lost.

James Williams, CEO of Mayweather Boxing plus Fitness, said: “Through every stage, you will learn how Floyd Mayweather defeats his rivals.”

There are also reflex training systems for athletes, helping athletes measure and practice their reflex speed.

“All major sports teams in the world use systems like this,” said Bob Bouw, sales representative of the Fitlight reflex system.

Meanwhile, a foldable electronic display system is used to measure hand-eye coordination, peripheral vision and many other reflex functions. This system serves the purpose of detecting whether athletes are experiencing a concussion.

Regular testing has also been scientifically proven to improve coordination smoothly – an indication that technology is strengthening for both the mental and physical aspects of sport.

There have been some interesting inventions introduced at the world’s largest consumer electronics exhibition (CES) 2018 in Las Vegas, USA.

Pouring wine without opening the bottle

Pouring wine without opening a bottle – what seems like only in this magic is true with Coravin special equipment. By piercing the cork with a tiny needle, users can pour out the wine while keeping the lid closed. As a result, the taste of expensive wines will be preserved, and the bottle can be kept in the cellar for a long time. However, the price of this product is also quite expensive, up to 999USD.

The TV can be rolled up

Flat-screen TVs, curved-screen TVs, and now even scrollable TVs. LG 65 “OLED TV, using flexible screen technology, when not in use can be rolled into the box to save space. So you can easily carry this TV to Wherever you want, users can use only part of the screen for a variety of purposes, such as checking the weather or adjusting music.

Virtual headset

Listen to music while working, without wearing headphones, nor does it affect anyone – office workers’ dreams will come true with the smart device of an Israeli startup.

The system, called Noveto, can track faces and shape the position of the ears, and then transmit the sound straight there. This type of virtual headset promises to be widely used in cars or entertainment centers.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

by

Advanced technologies are applied in sports (Part 2)

Shoes and balls with electronic chips

Attaching chips to shoes and balls has now become relatively common. Initially the technology paid little attention, but in late 2011, Adidas in one of its advertising campaigns gave famous player Messi the use of these “smart shoes“.

In addition to using the best materials (super light, super durable), the design best suited to each player’s condition, it also has an electronic chip under the shoe.

This chip is capable of collecting all data during the match to know how Messi played in 90 minutes: how many kilometers run, the highest speed, the average speed, power, etc. so that can give diet, training appropriate for Messi in particular and other football stars in general.

Swimwear speeds up

FINA’s Federation Internationale de Natation has approved athletes who use swimwear to reduce water resistance from the 2000 Olympic Trials.

Until the 2008 Olympics, Speedo’s LZR Racer swimwear went above all to become the most popular swimwear for swimmers. Since Speedo LZR Racer sets, strange numbers have been recorded on the green track.

Only in 2008, there were more than 40 new records on the established swimming lanes, this number was even double what the swimmers did during the 30 years before 2008. Of course. setting new records can also be set due to many other objective factors such as diet, exercise, mood etc.

Many legendary swimmers have broken many records when wearing this special swimsuit

But a series of set records also partly demonstrate that this particular swimsuit will help many athletes reach their destination a few hundred seconds earlier, which is more than enough for sports. Competitive on time like swimming.

Chip

Position mounted on shoes

Since then, the installation of electronic chips into balls and competition shoes has also been formed. The chip attached to the outside ball to measure the parameters, also intended to combine with the hawk eye system, determine whether the goals of the players are valid or not.

 

 

 

 

 

 

 

 

 

 

by

Advanced technologies that are applied in sports (Part 1)

People are constantly looking for ways to break records in any area. Therefore, technology always goes hand in hand with sports to create breakthroughs.

Hawk eye system

In 1999, Roke Manor Research Company developed this system. The project was led by Dr. Paul Hawkins (he took his name to name the system) and was sponsored by British television company “The Television Corporation”.

In tennis, this system was first used by Jamea Jackson in the 2006 Master ATP tournament held at Key Biscayne. Today, in high-level tennis matches, in football matches, the speed of the ball is very fast, so it really needs a “hawk eye” system.

On the other hand, the common characteristic of both subjects is to determine the position between the ball and the line to determine the winner. Considering tennis alone, the ball is over the designated line as if the batter lost the score. In football, this system is effective to avoid “ghost goals” (the ball has not crossed the lime line to count as a goal).

The hawk eye system is increasingly widely used in many sports. Although it is controversial when many fans think that the human game will go if all the results of the competition are decided by machines. In particular, in the king sport is football, sometimes the referee’s mistake is an unexpected “attractive” factor.

Spray paint spraying penalty kick

Thanks to the paint lines sprayed from the sprayer of the referee, the free kick phase is made faster and less unnecessary controversy. Behind the success of this “new technology” is Heine Allemagne.

He is 44 years old, living in the state of Minas Gerais (Brazil), inventing “painted lines” for him merely for the purpose of helping the referee work more smoothly and accurately.

Always in the mind of the idea of ​​creating a special foam to help the referee since 2000, after the self-exploration process, Allemagne invented a white foam made from vegetable oil capable of self Decompose after 1 to 2 minutes. Through testing at domestic playgrounds in Brazil, the most successful success of this invention was at the 2014 World Cup.

 

 

 

 

 

 

 

 

 

 

by

How was the world’s first solar pathway?

The solar line (including underground light energy collectors) is said to be one of the great innovations in the renewable energy industry in particular and the energy sector in general.

Every technology needs time to test and improve!

Covering an area of ​​up to 2,800m2, Normandy Road is the first solar street in the world, inaugurated in 2016 at Tourouvre-au-Perche, France. But now, after more than 2 years of operation, this road has been evaluated by experts as ineffective.

This road is now degraded heavily, all repairs will be too expensive. Last May, France had to eliminate a length of 100 meters because of a complete failure, could not be used. According to Le Monde, many light-receiving panels were no longer attached to the road, some sections were even broken due to the pressure of the vehicles above.

Besides the aforementioned failures, the Normandy line is also not functioning properly. When inaugurated, the road is expected to generate up to 790 kWh per day, providing enough for 3,000-5,000 people. But when it was put into operation, performance fell by half, continuing to decline over time. This road also creates much more noise than ordinary plastic roads, so that the vehicles passing through here must not exceed the speed of 70km/h!

According to the Daily Caller, this path works inefficiently because it is incapable of tilting in the direction of the sun (like sunflowers), along with being blocked by passing vehicles. Although costing up to 6.1 million USD, roads with up to 75% of the energy panels are broken before installation, which cannot generate electrical energy.

An electrical engineer even said it was “a heavy failure” in an interview with KXLY news. Even when operating normally, each energy plate can only provide one tap and a few bathroom lamps.

Even so, not all solar energy lines fail. In the Netherlands, a similar 70m long road was inaugurated in 2018. The original plan for this road was from 50 to 70 70 kWh/square meter a year, but after 1 year of use, this number up to 74 kWh, the next year increased to 93 kWh.

This year, the Netherlands is expected to open two more roads, one 50m long next to Amsterdam-Schiphol airport and one 100m long from Rotterdam, a few trees, on a bus-only road.

 

 

 

 

 

 

 

by

Some affective function you should know when using smartphone

In addition to the basic features such as messaging or listening, you can also use your smartphone to control indoor devices, turn voice into text or do surveillance cameras.

  1. Turn voice into text

Instead of typing content or typing text in the usual way, you can take advantage of the Google Voice feature to search, write email, edit text by voice. This means that users can free their hands to do more things. First, install Laban Key or Gboard application on Google Play or App Store.

Note, the name and location of options may vary depending on the device you are using. Finally, just touch the search box or open any text file, then tap the microphone icon on the keyboard and start talking.

As noted, Google’s voice recognition ability is relatively good. If you want to type dots, commas, and lines, users need to speak slowly and intermittently.

  1. Control indoor devices

Google Assistant is the smart virtual assistant, first launched at the Google I/O event in May 2016. This is considered an upgraded or extended version of Google Now, which allows smart device control by voice, searching for information, opening applications, etc. or simply chatting when lonely.

First go to Google Play and install the Google application. When finished, users just need to click on the microphone icon and say “OK Google” or press the Home button for a few seconds.

Then switch to the Update tab if the application doesn’t open automatically, click on the microphone icon and start chatting with the virtual assistant, Google Assistant will monitor the conversation, determine the context and give feedback. Retrieved with the correct information.

  1. Anti-theft camera

The first is to prepare two old and new smartphones, whereby old smartphones will make new cameras and smartphones as monitoring devices. Download and install the Manything app on both devices at http://manything.com/, compatible with Android and iOS.

The application has the ability to detect motion and send alerts by message, email, automatically record and provide a chart listing all recorded activities. When done, click Sign up button to create a free account or login quickly with Facebook.

 

 

 

 

 

 

 

 

by

Ford Explorer is upgraded with a range of luxury amenities (Part 2)

The list of facilities of Ford Explorer also includes equipment such as 230V AC drive and 4 12V electric drives (2 for the front row, 1 for the second and 1 for the luggage compartment); interior ambient color options according to preference; rearview mirror inside anti-glare; sunroof for two rows of front seats; start button; Handlebar column and MyFord function.

Two LCD monitors attached to the front seat headrests for passengers in the second row are the most valuable upgrades of the Explorer. This monitor duo is full of popular connections, from USB, HDMI, Bluetooth, Wifi, SD card, and MiraCast application. With such full connectivity, the rear seat person can enjoy music, movies or games, etc.

Not only is a normal display, but these two displays can also quickly charge handheld devices. The owner of the vehicle can also set a screen lock password to manage the length of the presentation and the content played on the screen.

Ford Explorer has no change in powertrain, Limited version in Vietnam is equipped with 2.3L Ecoboost I-4 gasoline engine combined with SelectShift® 6-speed automatic transmission that produces 273 hp at 5,600 rounds/minute and maximum torque of 420Nm at 4,000 rpm. This engine is compact but ensures performance comparable to other large engines with fuel consumption of less than 20%.

Ford Explorer is equipped with MacPherson front suspension and uses a 32m-diameter sub-frame and balance system; Multi-link rear suspension system with sub-frame system and balance bar. Ford Explorer is designed with a solid frame with a solid body (UNIBODY) structure, anti-twisting while reducing the weight of the vehicle to increase fuel economy.

Ford Explorer owns a full range of safety features, including ABS, EBD, BA, Sidewalk Departure, Dump Support, Electronic Balance, Traction Control, exclusive FordTrac Anti-Flip Stabilization System from Ford , Terrain Management System Terrain Management System, Blind Spot Warning, Lane Deflection Warning, Parking and Vehicle Parking Alert System and 9 Safety Airbags.

In American cars, a range of modern interior and exterior features, full of safety features as well as outstanding performance, the Ford Explorer is a perfect family car. This will be a good choice for the travel of large family members looking for a comfortable, comfortable and safe 7-seater car.