☆ Yσɠƚԋσʂ ☆

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Joined 6 years ago
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Cake day: January 18th, 2020

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  • Is Global Times blocked by the German regime?

    here’s the content for people living behind the great firewall of Europe:

    China achieves full-chain mastery in aero-engine material manufacturing technology: report Photo: Screenshot from China Media Group

    If the aero-engine is hailed as the “pearl in the crown of modern industry,” then the single-crystal turbine blade is the “diamond set upon that pearl.” At present, only five countries — the US, the UK, Russia, France, and China — have independently mastered the complete technology chain for single-crystal turbine blades, covering the full spectrum from materials research and development and precision casting, to engineering application, China Media Group (CMG) reported on Tuesday.

    The essence of an aero-turbine engine is that of an energy conversion device. It converts the chemical energy of aviation fuel into high-temperature and high-pressure thermal energy through combustion, then drives the turbine to rotate, transforming it into mechanical energy, and ultimately into the kinetic energy of the aircraft, said the report.

    The higher the temperature that the engine’s hot-section components can withstand, the higher the energy conversion efficiency, resulting in greater thrust, lower fuel consumption, and superior overall performance. Therefore, single-crystal turbine blades operate under extremely harsh conditions. They are a critical factor determining the engine’s performance, reliability, and service life, and serve as an important benchmark for measuring a country’s aviation manufacturing capability, CMG reported.

    Li Jiarong, chief engineer of the AECC Beijing Institute of Aeronautical Materials, along with his team, has developed a single-crystal superalloy with completely independent intellectual property (IP) rights that has reached the international advanced level.

    The report quoted Li as saying that “we have achieved the independent development of single-crystal turbine blade materials in China. Our second-generation single-crystal superalloy, DD6, offers performance that is superior to or equivalent to the second-generation single-crystal superalloys widely used in Europe and the US.”

    Moreover, the superalloy has a lower production cost. DD6 has become the most widely used single-crystal superalloy in China and has saved the country a large amount of strategic resources, according to Li.

    Over the years, the single-crystal turbine blades developed and delivered by the institute have been applied in multiple types of advanced aero-engines, providing strong material support for military and civil aircraft — represented by advanced fighter jets — as well as helicopters, said Li.

    According to CMG, the core mission of single-crystal turbine blades is to operate safely, stably, and reliably for long periods in extremely harsh environments involving ultra-high temperatures, high pressure, high rotational speeds, and corrosive gas erosion. Single-crystal turbine blades operate at temperatures that already exceed those of ordinary steel and even approach the melting point of their own alloy — so why can they still maintain long-term, stable operation?

    Yue Xiaodai, a researcher at the institute, said in the report that nickel-based single-crystal superalloys use metallic nickel as the base. Researchers scientifically design and precisely add a variety of alloying elements according to multiple performance requirements, including high-temperature strength, creep resistance, and high-temperature corrosion resistance.

    Although these elements have vastly different physical and chemical properties, the research team, through repeated experiments and persistent efforts, has not only achieved uniform melting and fusion of all elements, but also effectively controlled impurities, according to Yue.

    Since the 1980s, the institute has taken the lead in developing single-crystal superalloys with IP rights, along with China’s first single-crystal turbine blade and first single-crystal hollow turbine blade, among others. These achievements have filled multiple technological gaps in China, according to CMG.

    The manufacturing of single-crystal turbine blades, from alloy smelting and preparation to final product delivery, involves more than 10 major core processes. Each of these core processes is further subdivided into dozens or even tens of precise, detailed sub-steps. China has become one of only five countries capable of independently mastering the complete technology chain, CMG noted.










  • Nah, authoritarian is basically a term for any system of governance that’s different from western liberal capitalism originating in Europe. Russia has never been seen as truly European in the west, this is basically what the whole untermensch narrative nazis embraced is based on. In the Nazi racial hierarchy, being “white” or “Aryan” was not a given for all Europeans. Instead, an internal hierarchy existed where Nordic peoples were at the top, and Slavs were placed at the bottom, akin to non-European races. And these are the values Europeans very much embrace to this day.














  • Gene manipulation hasn’t helped against this non coding RNA attack because scientists only just discovered it exists. Before this study nobody knew the rice blast fungus could send a long non coding RNA molecule into the plant to hijack its natural microRNA immune guard. Traditional genetic modification focused on protein based resistance genes or boosting general defenses, not on this kind of cross kingdom RNA trickery. Even if you tried to engineer a rice plant to overproduce that microRNA, you might mess up other important processes in the plant because microRNAs have multiple jobs. So it’s not that making GM rice is impossible, it is just that you need to know exactly what you are targeting first. Now that the mechanism is exposed, scientists are working on a synthetic RNA spray as a faster fix while also considering breeding rice with naturally high levels of that protective microRNA. Permanent GM solutions are possible but require careful design to avoid collateral damage to the plant’s own systems.




  • Sounds like somebody skipped their history class, back in the 30s you would’ve had Gestapo or Abwehr because Germany was fascist at the time.

    The Ministry for State Security (German: Ministerium für Staatssicherheit, pronounced [minɪsˈteːʁiʊm fyːɐ̯ ˈʃtaːtsˌzɪçɐhaɪt]; abbreviated MfS), commonly known as the Stasi (pronounced [ˈʃtaːziː] ⓘ, an abbreviation of Staatssicherheit), was the intelligence service and secret police of East Germany (the German Democratic Republic or GDR) from 1950 to 1990.