News on China's scientific and technological development.

Jura The idiot

Jura The idiot

General
now I read
Chinese scientists find atomic model of a highly complex virus capsid
Xinhua| 2018-04-06 03:45:42
Please, Log in or Register to view URLs content!

Chinese scientists have reconstructed the atomic model of herpes simplex virus, one of the most complex viruses genetically and structurally, which expands the understanding of the assembly mechanism of the capsid.

In a study, published on Thursday in the journal Science, a team led by Wang Xiangxi with the Institute of Biophysics of the Chinese Academy of Sciences reconstructed the 3.1 angstrom structure of the herpes simplex virus type 2 (HSV-2) B-capsid.

The assembly pathway of herpesvirus produces three distinct types of capsids called A-, B- and C-capsids, all with mature angular shells and a similar assembly mechanism. It spreads within the host population efficiently, causing a range of diseases in humans, including congenital disorders and cancers.

However, little was known about the structure and assembly mechanism of the herpes simplex virus (HSV) capsid.

The 125 nm capsid of herpesvirus not only protects the viral genome from mechanical and other damage, but also functions to release the viral genome into the host cell nucleus during initial infection and to packaging the genome during the maturation.

The researchers found that there are four major conformers of the major capsid protein VP5, which exhibits striking differences in configuration and mode of assembly to form extensive intermolecular networks.

Those difference explained the stability of the capsid. They has found that a triplex fits between hexamers and pentamers at quasi-three-fold positions to cement the capsid together, and six copies of the small capsid protein VP26 form a ring on the top of the hexon to stabilize the capsid.

Based on the capsid structure, the researchers proposed a model for the ordered assembly of the capsid using a triplex and its covalently linked lasso triangle formed by three VP5s.

These basic assembly units then cluster into higher-order structures conforming to two-fold symmetry and guide nascent assembly intermediates into the correct geometry.

Wang told Xinhua, "the study elaborated the mechanism of assembly of the virus capsid in early stage, which laid a foundation for further study on its transport in neural cells."
Click to expand...
I add:
Please, Log in or Register to view URLs content!
 
K

KlRc80

Junior Member
Registered Member
At Leica, a partnership with Huawei is bearing fruit with breakthroughs in mobile photography
Please, Log in or Register to view URLs content!



IMG_20180329_093107-950x713.jpg


A visit to Leica’s hometown of Wetzlar will always be a highlight for any photographer visiting Germany. Open in 2014, the headquarters at the Leitz Park facility are also where the famed camera maker works with Huawei on its latest smartphones.

When Huawei first said that it was using Leica camera technology in its smartphones in 2016, there were many who doubted
Please, Log in or Register to view URLs content!
.



What’s a Chinese company that had often been accused in the West for its alleged ties to
Please, Log in or Register to view URLs content!
and whose phones
Please, Log in or Register to view URLs content!
doing with a venerable German innovator that is much-loved in the photography world?

Well, two years on, there isn’t any more doubt about the quality of Huawei phones that use Leica’s know-how in optics and image quality.

The phones that have come since – the Mate 9 and 10, and the P10 and now the latest P20 – are clearly the best in the business of smartphone photography.

As I saw last week during a media visit to the Leica headquarters in Wetzlar, Germany, this partnership was not just a branding exercise. Huawei wasn’t simply slapping on the Leica brand.

IMG_20180329_100117-950x713.jpg

The very first portable camera prototype created by inventor Oskar Barnack in 1913, displayed at the Leica headquarters. PHOTO: Wilson Wong

The work that Leica put into the P20 is testament to that. Instead of the wide and ultra-wide lenses on rival smartphones, the folks at Leica went with a 3x zoom camera module, after consulting users.

This was on top of the already impressive monochrome and colour camera modules already on
Please, Log in or Register to view URLs content!
. So, the P20 has three sensors – a first for a smartphone.

“The people who have taken pictures with the smartphones, they also aim for having a kind of an optical zoom so they want to be closer to the object,” said Marius Eschweiler, Leica’s global director for business development.

MG_8255-950x633.jpg

The P20 Pro comes with a three-sensor-lens system that works together to create images within the camera itself. From left: 20MP monochrome sensor, 40MP colour sensor and 8MP sensor with 3x optical zoom. PHOTO: Wilson Wong

Another decision that Leica made when it came to improving the camera prowess on the new P20 was the main sensor to capture the colours in an image.
 
K

KlRc80

Junior Member
Registered Member
continued ...

Dr Florian Weiler, project manager of optical design, told reporters that the 40-megapixel sensor not only provides good image quality at the wide angle of 27mm (full-frame equivalent) but also allows up to 3x magnification without any degradation. This, he added, is thanks to the amount of data provided by the sensor.

Still, despite the technology it provides, Leica is also known for its attention to detail and insistence on quality. Its cameras are
Please, Log in or Register to view URLs content!
, but you can count on their quality.

IMG_20180329_102301-950x713.jpg

With assembly stations staffed by experienced technicians, Leica has always produced top-quality, handcrafted lens for its camera systems. PHOTO: Wilson Wong

Some Leica employees have more than a decade of experience in hand-assembling camera lenses – one has been doing it for 30 years, we are told. There are quality tests done at every conceivable step of the production, with very little deviation allowed for the completed product.

Interestingly, people and not just technology have an important part to play in producing Leica’s famed image quality. For the new Huawei phones, a panel of experts provide subjective views to tweak the settings further, before they are used by the phone’s camera system.

The new phones have a Leica characteristics or “look” that comes with a certain signal-to-noise ratio, colour reproduction and dynamic range, according to Leica executives.

IMG_20180329_112556-950x713.jpg

At an interview session with (from left) Peter Gauden, Huawei’s global senior product marketing manager, Dr Florian Weiler, Leica’s project manager for optical design, and Marius Eschweiler, Leica’s global director for business development. PHOTO: Wilson Wong

It helps that the German company has had a big part to play in making cameras as we know today. Back in 1913, the first 35mm compact camera was created by engineer Oskar Barnack at Leitz Camera. Leica, an anagram of that, was the name given to that breakthrough camera.

In many ways, Leica engineers today see themselves as innovators on another compact format – the smartphone. After all, this is the main camera of choice today for users.

In the P20 launched just
Please, Log in or Register to view URLs content!
, we got the first large 1/1.7-inch sensor in a smartphone, which brought huge improvements in image quality. Not to mention the artificial intelligence (AI) that is playing a bigger role now.

P20_SG_FAMILY-950x438.png

The Huawei P20 and P20 Pro. The latest mobile photography powerhouse made with the help of Leica’s technology. PHOTO: Handout

“There are no images, no example photos, which reside in the new (AI) processing unit,” said Peter Gauden, a global senior product marketing manager at Huawei.

He added the images are looked at by a “mathematical equation”, which helps the phone understand what that image actually is.

It then applies the settings for an “aesthetically pleasing” version of a beach scene or a portrait or a picture of the cat, he explained.

With more people using smartphones as their main camera, the improvements to the processor will only make the smartphone camera smarter. For example, it will not only recognise the subject as a dog, but the exact breed as well.

IMG_20180329_093506-950x713.jpg

The lobby of the Leitz Park facility. Photos taken with Leica cameras are displayed prominently. The company believes camera systems and smartphones will co-exist. PHOTO: Wilson Wong

With the next Huawei Mate smartphone being planned for the second half of the year, the Leica folks are not resting after the latest breakthrough. Its camera performance is expected to improve on the just-launched P20.

Leica and Huawei now have more teams working in the areas of R&D and innovation than before, according to both companies’ representatives. Yet, there is a finite space on a phone.

Huawei has to provide a phone concept and a place on the phone for Leica engineers to work with. Engineers from both sides then come together to fit that camera into the slim body of a phone. On the P20 Pro, that includes placing no fewer than three lenses for the main rear camera.

Said Leica’s Dr Weiler: “The biggest challenge is to convince Huawei to give us more space!”
 
Jura The idiot

Jura The idiot

General
now I read
Facial recognition assists airport security checks in China
Xinhua| 2018-04-08 14:02:59
Please, Log in or Register to view URLs content!

An increasing number of Chinese airports are now using facial recognition systems to help quicken their security checks for the convenience of air travellers.

A total of 557 security channels at 62 airports, including Shanghai Pudong International Airport and Guangzhou Baiyun International Airport, have been equipped with the auxiliary system, according to the Chongqing Institute of Green and Intelligent Technology under the Chinese Academy of Sciences, developer of the system.

The system has proved its efficiency and accuracy after being used by about 80 percent of the country's airports whose annual passenger throughput exceeds 30 million people.

"It takes less than one second for the system to match a passenger's face with their ID photo, while checking the validity of the credentials," said Shi Yu, head of the institute's smart security center.

Shi said the institute is developing the facial recognition technology for automatic airport check-in. With the system, passengers can avoid check-in formalities and go directly to the security channels, where cameras capture images of their faces and scan their ID cards or passports to verify their identity.

An upgraded system will be put into use at an airport in Changsha, capital of central China's Hunan Province, in May, and then at Yulin Airport in northwest China's Shaanxi Province in June, before being promoted for use nationwide.
Click to expand...
 
solarz

solarz

Brigadier
PiSigma said:
Just make sure it is not for flights from south Korea. All those plastic surgery tourism faces will be different.
Click to expand...

Did you know that Google photos uses facial recognition? The thing I discovered is that AI facial recognition doesn't work the same way as human facial recognition.

Pretty amazingly, Google was able to recognize photos of my son from newborn to 5 years old as the same person. It really boggles my mind how it's able to do that.

On the other hand, it also thinks my twin girls are the same person, even though I can clearly tell them apart. To me, their facial differences are quite distinctive, but Google isn't able to tell.
 
PiSigma

PiSigma

"the engineer"
solarz said:
Did you know that Google photos uses facial recognition? The thing I discovered is that AI facial recognition doesn't work the same way as human facial recognition.

Pretty amazingly, Google was able to recognize photos of my son from newborn to 5 years old as the same person. It really boggles my mind how it's able to do that.

On the other hand, it also thinks my twin girls are the same person, even though I can clearly tell them apart. To me, their facial differences are quite distinctive, but Google isn't able to tell.
Click to expand...
Ya I knew that. Microsoft does the same thing.

Formated my old computer recently and somehow windows dug up an old photo of me and my wife (10+ years ago) and labeled them correctly.

Facial AI is only an added level, can't replace good old fashion human eyes yet.

I also find all the SK models and pop stars look exactly the same (other than hair), maybe they all went to the same surgeon. Or all wanted the same popular look.
 
AssassinsMace

AssassinsMace

Lieutenant General
I remember reading a story a few months back that some Chinese women coming back from plastic surgery in South Korea couldn't get past airport security because all their faces were swollen up and unrecognizable. I have no idea if facial recognition was involved.

I remember reading also that one of the US social media giants was going to make it possible for anyone to find every image posted in the world just of a specific individual though facial recognition technology. So people could find pictures of themselves or someone else that they didn't even take but some stranger did where that specific person happen to be in that shot. These days with the Facebook scandal they're probably going to have second thoughts.
 
T

taxiya

Brigadier
Registered Member
AssassinsMace said:
I remember reading a story a few months back that some Chinese women coming back from plastic surgery in South Korea couldn't get past airport security because all their faces were swollen up and unrecognizable. I have no idea if facial recognition was involved.
Click to expand...
I remember that too. If my memory serves me right, they were refused enter by the boarder control because their "face" do not match the passport. The security check is another separate point in the procedure.
 
Hendrik_2000

Hendrik_2000

Lieutenant General
While China and US squabbling about IP China continue her march into Quantum technology domination
Please, Log in or Register to view URLs content!

China gaining momentum in quantum-computing arms race
‘They have nearly two times as many patent families projected for 2017 as the United States’
By Asia Times staff April 10, 2018 4:12 AM (UTC+8)

US-Chinese-inventions-1-630x378.jpg

As leaders in Washington squabble about how to protect existing intellectual property, crying foul at China’s efforts to catch up, America may be losing ground in a race to develop key technologies.

Patent research firm Patinformatics found that filings for inventions in the area of quantum information technology (QIT) has skyrocketed in recent years, driven mainly by China. In fact, China is blowing the closest competition, the US, out of the water.

While IBM has a substantial QIT patent portfolio, its focus is primarily on hardware and Qubit technologies. Meanwhile,
Please, Log in or Register to view URLs content!
, Chinese organizations are dominating the patenting of QIT applications, having amassed nearly twice the number of patents projected for 2017.

“Chinese firms, Qasky, QuantumCTek, and Shenzhou Quantum are worth watching considering the enormous patent portfolios they are building,” Patintformatics analysts said. “Approximately 72% of the academic patent families published in QIT since 2012 have been from Chinese universities. US universities are a distant second with 12%.”

The report found that quantum computer manufacturers tend to be based in North America, while Asian-based organizations are focusing on cryptology and communication applications.

“North American organizations may control the computer, but Asian organizations may end up controlling how those machines are used.
 
You must log in or register to reply here.
Top