Gezixuan reported on November 12 that according to the official news of Beijing Yizhuang, the "Humanoid Robot Marathon Solicitation Order" was released yesterday (November 11) in Beijing Economic and Technological Development Zone (Beijing Yizhuang).

The world's first humanoid robot marathon, guided by the Beijing Municipal Bureau of Economy and Information Technology and the Beijing Economic and Technological Development Area Management Committee, will be held in Yizhuang, Beijing in 2025 with the theme of "Intelligent Competition".

The event will set up a series of awards and bonus incentives, such as the Finisher Winner, the Best Endurance Award, and the Best Popularity Award, and the registration deadline is February 2025.

According to IT House, in the 2024 Beijing Yizhuang Half Marathon held on November 10, the "Tiangong" robot brought a performance at the starting point, "cheering" for the runners through gestures and interactions, and greeted the runners at the finish line. In addition, the humanoid robot "Tiangong" has been confirmed to participate in next year's competition.

Gezixuan reported on November 11 that according to Washington Post, a new study questioned the health benefits of standing desks. Researchers who studied the incidence of major cardiovascular disease (CVD) in 83,013 UK adults found that changing part of their daily office hours to standing did not reduce the risk of cardiovascular disease, and that standing for long periods of time could also lead to potential health problems such as varicose veins, low blood pressure and blood clots.

The 6.9-year study noted that while standing may have some health benefits, standing for long periods of time also comes with some negative effects, as understood by IT House. The researchers noted that previous studies on the topic of standing desks had been sparse and inconclusive, so they conducted this large-scale, extensive study. Despite the difficulty of obtaining high-quality research, standing desks with health, ergonomic, or other health labels continue to pop up on the market.

It is widely believed that changing posture at work is beneficial for health. However, the researchers found that in monitoring more than 83,000 adults, substituting standing time for sitting time did not confer any significant health benefits.

Still, the study has some value for those who are concerned about the health risks of sedentary sitting. The researchers note that it is not enough to consider only the two static postures of sitting and standing, it is important to be hyperactive. Investing in a height-adjustable desk may not be necessary, as the most important thing for people who sit for long periods of time is to be more active.

No matter what type of desk you're using, hyperactivity is a free and viable health strategy. Every half hour or so, get up and move, such as walking around the office, going up and down stairs, or simply standing and sitting a few times.

The researchers emphasize that simply standing does not reduce the risk of cardiovascular disease and other sedentary-related diseases, but it does not increase the risk either. Therefore, setting a timer to remind yourself to be hyperactive may be more effective in improving your health than spending a fortune on a standing or adjustable desk.

Gezixuan reported on November 8 that according to a report by Science and Technology Daily on November 7, Xia Tian, Lu Zhengtian, Zou Changling and others from the University of Science and Technology of China worked together to prepare a spin-based Schrödinger cat state using the laser cold atom method, whose lifetime reached the order of minutes, which helped to improve the measurement sensitivity of the spin precession phase. The results were published in Nature Photonics on November 1.

In the course of the study, the research team successfully achieved a Schrödinger cat state with an ultra-long coherence time. The researchers used the optical lattice to trap ytterbium-173 atoms with 5/2 spin, and prepared a superposition state composed of two states with spin projection of + 5/2 and -5/2 by controlling the laser pulse to induce a nonlinear optical frequency shift for the atom. Since the magnetic quantum numbers of these two states are the farthest apart, their superposition states are called Schrödinger cat states.

This cat state has enhanced magnetic field sensitivity, and at the same time feels exactly the same optical frequency shift in the optical lattice, and is in the "incoherent-free subspace", so it has natural immunity to the intensity noise and spot morphology changes of the optical lattice.

The experimental results showed that the coherence time of the cat state exceeded 20 minutes. With Ramsey interferometry, the researchers confirmed the sensitivity of phase measurements close to the Heisenberg limit.

According to the researchers, the preparation of this long-lived Schrödinger cat state will open up new avenues for atomic magnetometers, quantum information error correction and the exploration of new physics.

Schrödinger's cat is a thought experiment proposed by Austrian physicist Erwin Schrödinger in 1935. Through this thought experiment, Schrödinger pointed out the problems that arise from the application of quantum mechanics to macroscopic objects and the contradictions between them and the common sense of physics. In this thought experiment, due to the random nature of previous events, cats are in a state of superposition of life and death.

The link to the paper attached to IT Home is as follows:

https://www.nature.com/articles/s41566-024-01555-3

Gezixuan reported on November 6 that the 15th China International Aviation and Aerospace Exhibition has entered the final week countdown, and a large number of new equipment of the Air Force will be unveiled at this China Air Show.

According to CCTV, the Navy's heavy carrier-based fighter J-15T has just landed in Zhuhai, it is the core armament of the aircraft carrier formation, and it is an important force of China's naval aviation, which is also the first time that the People's Navy fighter has appeared at the China Airshow.

The J-15T aircraft is a heavy carrier-based fighter based on the J-15 that focuses on improving the performance of avionics weapon systems and aircraft platforms, and further highlights the carrier-based characteristics and seaworthiness, and is the core weapon and equipment of the aircraft carrier formation.

In addition, the Air Force's "Red Eagle" air show team has also landed in Zhuhai today. The "Red Eagle" flight demonstration team has designed more than 20 aerobatic maneuvers for this air show, and some of them have been optimized and updated, which will bring more surprises to the air show audience.

The 15th China International Aviation and Aerospace Exhibition (hereinafter referred to as "Airshow China") will be held from November 12th to 17th at the Zhuhai International Airshow Center.

This year's Airshow China will open 13 exhibition halls, with an indoor exhibition area of 120,000 square meters, an increase of 20% from the previous 100,000 square meters; The outdoor exhibition area is about 230,000 square meters; For the first time, the "unmanned system demonstration area" in Doumen Lianzhou was opened, including the "unmanned ship demonstration area" and the "drone demonstration area".

For the first time, this year's air show will create a new dynamic demonstration pattern of "air, sky, sea and land" integration, presenting the performance forms of "manned + unmanned", "on-site + remote" and "land + sea". The Russian "Warrior" air show team will return to the China Air Show, when it will send six Su-35S fighters to form a formation and perform on the same stage as the "Bayi" and "Red Eagle" air show teams of the Chinese Air Force.