News on China's scientific and technological development.

broadsword

broadsword

Brigadier
Chinese atomic clock given international recognition

English.news.cn 2014-08-21 22:38:23 [More]

BEIJING, Aug. 21 (Xinhua) -- A Chinese atomic clock has been accepted by international authorities as a primary basis for high-precision international atomic time, announced the National Institute of Metrology (NIM) on Thursday.

The cesium atomic clock, known as NIM-5 and developed by the institute, is a kind of extremely accurate time-keeping device. It can be accurate to within one second over 20 million years, according to Chinese media.

The nod from the Paris-based Bureau International des Poids et Mesures, the authority for international time and frequency standards, has made China the eighth country to calibrate the international atomic time, after France, the United States, Germany, Italy, Japan, the UK and Russia.

Insiders said the clock could define a Chinese atomic time independent from GPS signals or other international time-keeping data.
 
broadsword

broadsword

Brigadier
While not exactly an innovation, it shows the potential of 3D printing.


Surgeons replace a 12-year-old's cancerous vertebra with a 3D-printed implant

By Nick Lavars

August 25, 2014

According to market-based research firm IDTechEx, the medical and dental market for 3D-printers is set to grow from US$141 million to $868 million by the year 2025. And when you consider the recent spate of groundbreaking medical procedures, it is pretty easy to see why. The latest surgery brought to you by the seemingly endless possibilities of 3D-printing comes at the hands of doctors at China's Peking University Third Hospital, who produced a custom implant to replace a cancerous vertebra in the neck of a 12-year-old boy.

Minghao (a pseudonym) didn't feel much pain when he headed a soccer ball during a match with his friends. But waking up the next morning with a stiff, aching neck offered an early sign that something was not quite right. One month after the incident, Minghao's entire body went numb, leading spinal experts to perform a biopsy and ultimately diagnose him with a malignant tumor on the second vertebra in his neck.

Following two months of lying in the orthopedics ward at Peking University Third Hospital, only able to stand for a few minutes at a time, doctors commenced what would be the world's first 3D-printed vertebra surgery.

Over five hours, the doctors removed the cancerous vertebra and implanted the 3D-printed piece between his first and third vertebrae. This involved clearing the nerves, carotid arteries and spinal chord of cancerous tissue and fixing the artificial vertebra in place with titanium screws, The doctors say the 3D-printed implant was an improvement on current methods and enabled a much quicker recovery time.

"Using existing technology, the patient’s head needs to be framed with pins after surgery," Liu Zhongjun, director of orthopedics at Peking University Third Hospital, told CCTV.com. "The patient’s head cannot touch the bed when he is resting. This lasts for at least three months. But with 3D printing technology, we can simulate the shape of the vertebra, which is much stronger and more convenient than traditional methods."

A huge advantage of 3D-printing is the ability to customize medical implants, allowing for a perfect fit with the patient's anatomy. Some recent examples include 3D-printed spine cages, skull and jaw implants, along with customized mouthpieces for sleep apnea sufferers.

While he is unable to speak and uses a writing board to communicate, Minghao is said to be in good physical condition and recovering as expected.
 
TerraN_EmpirE

TerraN_EmpirE

Tyrant King
The Question on this is it really practical? I mean sure this proves it can be built but so can a Orion Nuclear pulse Detonation Drive if you throw enough Trillions at it. And the power requirements would be substantial, And then If you build it For what purpose?, And Don't say sneak attack. This thing would likely be loud enough to set off Every sonar listening post the Pacific and atlantic and generate a wave form that would be very visible. I don't think a really practical submarine can come from this it might make more practical Supercav torpedos and other weapons a possibility perhaps super Cav being used for missile launches but it's still going to be a decade before that comes to reality.
 
N

no_name

Colonel
I'd hate to be the whale that was in the way.

Btw I think this was a fake news originally from HK media, who exaggerated an actual research being done in China
 
TerraN_EmpirE

TerraN_EmpirE

Tyrant King
Don't even need to be in the way No_name. In fact considering being the Whale wondering if that object coming closer to him at a very high speed will be his friend would be merciful.
Remember those claims that the USN sonar tests we causing massive sea deaths? yeah now think about it something the size of a Submarine even a small sub breaking the sound barrier under water. the Water is going to evaporate as it passed to so this thing would be really nasty to marine life.
 
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Equation

Equation

Lieutenant General
TerraN_EmpirE said:
The Question on this is it really practical? I mean sure this proves it can be built but so can a Orion Nuclear pulse Detonation Drive if you throw enough Trillions at it. And the power requirements would be substantial, And then If you build it For what purpose?, And Don't say sneak attack. This thing would likely be loud enough to set off Every sonar listening post the Pacific and atlantic and generate a wave form that would be very visible. I don't think a really practical submarine can come from this it might make more practical Supercav torpedos and other weapons a possibility perhaps super Cav being used for missile launches but it's still going to be a decade before that comes to reality.
Click to expand...

True, yes it may be loud and easily located but does the opponent forces has anything fast enough to kill it? This thing can out ran an enemy torpedo and maneuver quickly for a counter attack before the enemy submarine has the chance to escape safely.

Like the saying goes..."Speed kills".
 
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