News on China's scientific and technological development.

[dingyibvs]

Is CF used in ship construction at all? I imagine it's not very useful for hulls but what about the superstructure?

 

[gelgoog]

Fiberglass is used to build superstructures. You can also use it to build minesweepers, because the hull won't attract magnetic mines.
Some submarines also use fiberglass in the outer hull. Again this means they won't be detected by magnetic anomaly detectors.

I am not sure about carbon fiber but it could probably be similarly used.

 

[burritocannon]

I am not sure about carbon fiber but it could probably be similarly used.

most infamously by oceangate...

 

[latenlazy]

Fiberglass is used to build superstructures. You can also use it to build minesweepers, because the hull won't attract magnetic mines.
Some submarines also use fiberglass in the outer hull. Again this means they won't be detected by magnetic anomaly detectors.

I am not sure about carbon fiber but it could probably be similarly used.

CF can get waterlogged. That’s why fiberglass is used.

 

[tphuang]

yes, I've definitely read about ships using carbon fiber composites.

 

[escobar]

U.S.-China Trade Truce Risks Falling Apart Over Rare-Earth Exports

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AmCham President Says China Isn’t Blocking Rare Earths Exports

“We are seeing some approvals come through — certainly slower than industry would like,” said Michael Hart, president of the American Chamber of Commerce in China. “Some of the delay is related to China working through their new system to approve exports, not that they are not allowing exports.”

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[escobar]

China’s decision in early April to restrict exports of rare earths and permanent magnets that are vital for the production of electric vehicles, medical equipment, chipmaking tools, and military hardware, is affecting Europe to a greater extent than has been publicly acknowledged by governments and companies. I was told that European leaders have held crisis talks on the issue, and that major firms in the medical equipment and car sectors have already been forced to shut production lines. Hundreds of smaller companies are also reeling

Beijing is sending an unmistakable message to Europe and other developed countries about the consequences of erecting trade and technology barriers against China. “It is the most extreme case of economic coercion that I’ve ever seen from China,” a veteran diplomat from a large European country told me. “The goal is to show us [that] if you restrict things that we need, there will be a cost, and it will be a big one.” An EU trade official added: “We are entering perilous territory. The disruption has been immediate and it has been lethal. The Chinese have tasted blood.”

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[escobar]

Global alarms rise as China's critical mineral export ban takes hold

Diplomats, automakers and other executives from India, Japan and Europe were urgently seeking meetings with Beijing officials to push for faster approval of rare earth magnet exports, sources told Reuters, as shortages threatened to halt global supply chains. A business delegation from Japan will visit Beijing in early June to meet the Ministry of Commerce over the curbs and European diplomats from countries with big auto industries have also sought "emergency" meetings with Chinese officials in recent weeks

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[tokenanalyst]

Laser-nanofabrication-enabled multidimensional photonic integrated circuits.​

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Abstract​

The ever-increasing demand for data capacity and information processing speed is driving the development of new techniques to break the performance limitations of current electronic-based data processing systems. Photonic integrated circuits (PICs) have been promising candidates for next-generation chip technology, featuring broad bandwidth, low power consumption, and ultrafast data processing speed. Recent advances in three-dimensional (3D) PIC fabrication and integration of two-dimensional (2D) materials with unique structures and distinctive properties have accelerated PIC development, yielding new possibilities for device realization with outstanding performance and new features. Advanced nanofabrication techniques are fundamentally important for device realization, among which laser nanofabrication, exhibiting one-step and maskless writing capability, has been widely used to fabricate 2D/3D PICs. Although there are several reviews about the fabrication of 2D or 3D PICs, none of them touched on the potential of integrating 2D materials with 3D PICs, which opens new avenues for integration and functionalities and will be substantially important for future development. This review provides a comprehensive overview of laser nanofabrication techniques in multidimensional structure manufacturing for PIC applications. Building on the recent advancements in 3D PIC fabrication and 2D-material-based functional devices, we highlight the potential of integrating 2D materials with 3D PICs. This integration paves the way for creating multidimensional structures with unprecedented optical properties and functionalities, unlocking opportunities that have yet to be explored. By highlighting these possibilities, this review aims to foster new insights and inspire novel directions in the field of PICs.​

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[Enestori]

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China supports European manufacturing and wants Europe to succeed.

The problem is that Europe has a history of transshipping China's rare earth magnets to Lockheed Martin and other USA weapons manufacturers. America then uses China's rare earth magnets to produce "

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" - violating export controls and international norms.

To support Europe, China still exports rare earth magnets to European companies like Volkswagen, even knowing that some will end up in F-35 jets. However, Europe needs to massively step up its game, enforce export controls, and de-risk its economy from USA weapons production.