Tilting social welfare policies in favor of young people to encourage new births in the face of a low birth rate has been a common view in Chinese society. However, the idea of offering a house as a gift to young parents upon the birth of a child, proposed by a Chinese professor, hasn't received as much support. The suggestion has ignited a firestorm of online discussions and debates.
Professor Di Dongsheng from the Renmin University of China put forward the proposal in a recent episode of the program "China Is Speaking" aired on Southeast Television, in 2023.
He began by noting that young women giving birth to children is a valuable contribution to labor and has profound significance for the country and society. He then expressed his belief that the state should provide corresponding subsidies to these young women to recognize their contributions to society.
Di further proposed that such subsidies can be diversified, and one direct way is to provide housing subsidies for young women, adding that the house needn't be big, but rather a modest single-bedroom house to accommodate a one-child family.
"What if I said yes, would you gift one one-bedroom house to me?" Chenchen, a netizen posted, throwing the question back to the professor, questioning the practicality of the scheme.
Others opined that such a policy would not move them into parenthood. "It is true that I am tempted, but if marriage protection and psychological care for women are not enough, I still refuse to give birth," Jiuer wrote. "It seems like one house is a once-and-for-all solution for those who don't want a child… [it is useless] unless you sent the money for the milk powder, too," Weile, another netizen commented.
But "some families may force the mother to have one child after another in order to get more houses. Eventually, it may lead to female reproductive exploitation," Liubao, another commenter argued. "It really depends on the city in which the house is located. Presenting me with a house in the middle of nowhere wouldn't prompt me to move in," Lingling said.
One online poll, in which over 225,000 people participated, revealed an overwhelming support for the professor's idea among netizens. Out of the total respondents, 141,000 expressed their desire to have a child if they were offered a one-bedroom house as a gift, while the remaining 83,000 opted to not have children .
Demographers reached by the Global Times generally pointed out the fanciful nature of Di's remarks, noting that housing is just one of the factors contributing to young people's reluctance to have children. Boosting people's desire to have children requires a comprehensive strategy on how to build a "birth-friendly society."
A Tianjin-based demographer who spoke on condition of anonymity described Di's remarks as short-sighted and poorly thought out.
Clearly, purely relying on material rewards cannot solve the problem, Peng Xizhe, director of the Fudan University Center for Population and Development Policy Studies, said.
The government's preferential policies should not be aimed at reversing people's attitudes toward childbearing or persuading them to have children. Instead, preferential policies should aim to provide as much support and welfare as possible to those who are willing to have children, Peng told the Global Times.
Some of the supporting measures reported by the media include granting parental leave, childcare allowances, and flexible work arrangements on a family basis, in order to increase paternal involvement in childcare, reduce employment discrimination against women due to childbirth, and alleviate women's concerns about having children.
Linze County in Gansu, for instance, issued a document to provide annual childcare subsidies worth 5,000 yuan for every second child and 10,000 yuan for every third child until the child is 3 years old.
To actively respond to the population worries and effectively address the dilemma of declining birth rates, Li Ting, a professor at the School of Sociology and Population Studies at the Renmin University of China, suggests an overall practical plan for a "birth-friendly society," establish a long-term, comprehensive, and strategic reproductive support childbirth system.
Peng noted that the most crucial issue is still finding a balance between women's career development and their family responsibilities. This requires not only comprehensive government policies but also the cultivation of a culture that supports childbearing, as well as greater tolerance and support for women from the society as a whole, Peng said.
Developed countries, including Singapore, Japan, and South Korea, have comprehensive policies to encourage childbirth, but their birth rates have not increased significantly. It is more about a change in people's lifestyles and their overall concept, Peng said.
The total number of births nationally was 9.56 million in 2022. Among the births in 2022, second children accounted for 38.9 percent of the total, while the proportion of third children and above accounted for 15.0 percent, according to the National Health Commission.
If you have recently taken an evening walk in a park, you might have come across some young people wearing fluorescent bracelets running and hiding to evade capture. Not only is this nothing to be scared of, but it's the latest sweeping sensation among social games in China. After frisbee became a phenomenal across the country, young people in China now "invented" a new outlet to channel their stress and socialize: Originating from some college campuses early this year, the live-action cat-and-mouse game has instantly taken many cities by storm.
If you search for the key words "cat-and-mouse game" on platforms such as Xiaohongshu or Douyin, the domestic version of Tiktok, you will find a multitude of online groups organizing the game in parks, plazas and lakes.
It takes only 7 to 19 yuan ($0.9-2.6) to sign up for one game where you will be provided a bottle of water, an insurance, fluorescent bracelets and light sticks. Dozens of participants will be divided into two teams: "cats" and "mice." The cat team is tasked with capturing as many mice as possible within the designated time and game area.
Physical contact is not allowed during the game, however a light touch by the "cat" will turn the "mouse" into a member of the "cat" group and the catcher will be awarded a light stick. The "cat" who got the most light sticks will be crowned the "king of cats."
Hide-and-seek
The rules of the game are reminescent of hide-and-seek, but technology adds a new dimension to the game and makes it a more intensive exercise.
All participants are required to turn on location sharing on their mobile phone application so that every body's real-time location is clear at a glance.
Unlike the traditional hide-and-seek where the "mice" hide in one place and wait to be found, the "mice" of this game have to keep moving and evade capture in the dark. Within an area about five kilometers wide, running and taking advantage of stairs, woods and shelters looks like a live version of Fast and Furious.
The game has quickly become a phenomenon in more than 50 cities across China including Beijing, Shanghai, Chengdu, Hangzhou, Guangzhou and Shenzhen.
One social sports mini program on WeChat has launched a particular column for people to sign up for the game. On October 23, dozens of spots were available in Beijing, Xi'an and Chengdu and some 40 people signed up for a Halloween-themed event in Beijing's Chaoyang Park.
Bao Jun, a 33-year-old who recently played the game in Beijing's Haidian district, told the Global Times that the game evoked his childhood memories.
"I had a lot of fun while running two kilometers that night. It's an opportunity to make new friends and relieve work pressure," said Bao.
Chen, an organizer in Hangzhou, East China's Zhejiang Province, said the game has gained instant popularity in Hangzhou around the National Day holidays.
"Selecting a proper spot is key to ensure enjoyment of the game and safety. Being able to socialize while doing exercise in a fun way is appealing to many young people. It's a new pastime after work or study," said Chen.
Compared with frisbee and flag football, the game is not competitive and is widely accessible. Whether one is a "cat" or a "mouse," the game allows participants to run a lot and socialize with teammates while discussing strategies to win the game, which gives participants a sense of accomplishment.
Social tool
Humans are "social animals," and people's study, work and entertainment are often group-based. Playing "cat and mouse" is innate to human nature, according to Ding Daoshi, an internet analyst.
In the post-pandemic time, it's one of the examples of people releasing their pent-up social emotional demands, just like the rebound of tourism industry. In essence, this is a social game, said Ding.
Nie Xiaojing, a psychologist with The Fourth People's Hospital of Chengdu in Sichuan Province, said that the game is an escape from the real life.
When people are engaged in this game, there is no pressure. It doesn't matter whether you win or lose.
The sporty nature of the game is also different from regular exercises. With goals to achieve in the game, it allows participants to exercise while having fun. In addition, the social aspect is particularly important. Participants have to stick together, which is an important interpersonal link and provides a sense of belonging.
"When you try to complete a task together, the interpersonal relationships will be promoted through verbal, physical and emotional connection," said Nie.
The game went viral across the country because it is well known to the public and does not require any technical training. In addition, the adult participants experience a cognitive contrast as it is perceived to be a children's game. Without professional requirements, the set up cost of the game is quite low, according to the social sports mini program.
However, it remains a question whether the craze will survive the upcoming winter when it's too cold to play such a game outdoors, especially in northern China.
"The number of participants is likely to drop in winter. But we are trying to enrich the game with new elements. I believe the game will come back stronger in spring," said the organizer Chen.
The Hangzhou Asian Games was full of bright and impressive sports victories of participants. Among them, the national team of Uzbekistan won 71 medals - 22 gold, 18 silver, and 31 bronze medals - entering the top 5 of Asian countries and regions.
In recent years, Uzbekistan has consolidated the image of a country with outstanding athletes - chess players, boxers, judoists, weightlifters and the like. At the Asian Games in Hangzhou, the audience witnessed the appearance of Uzbek sports stars in boxing, taekwondo, athletics, fencing, rowing, etc.
Observers noted that this was the result of the development of sports in the country. An effective system of training professional athletes, coaches, medical staff and judges has been created in Uzbekistan, a spokesperson of the Uzbek Embassy in Beijing told the Global Times. The implementation of these goals in every way contributes to the wide promotion of a healthy lifestyle, the education of comprehensively developed youth, and the further development of physical culture and sports.
Measures for the development of physical culture and sports are defined in the Development Strategy of the New Uzbekistan for 2022-2026. In 2022, expenses allocated for the development of sports in Uzbekistan increased five times from 2017, according to the embassy.
One hundred and eighteen large sports facilities have been put into operation in the country and 110 more facilities have been reconstructed. Thanks to the sports infrastructure, Uzbekistan has become a venue for major international competitions, including the World and Asian championships in boxing, taekwondo, freestyle wrestling, fencing and other sports. Preparations are underway for the Asian Youth Games in 2025.
A healthy lifestyle is widely approved among young people in the country, and mass sports are provided. Uzbek athletes, achieving victories at prestigious international competitions including the Hangzhou Asian Games, demonstrate the high sports potential of Uzbekistan. The results achieved by athletes in Hangzhou vividly present Uzbekistan to the sports community of the world as a country where sports are developing at an accelerated pace, the spokesperson told the Global Times.
Hong Kong Special Administrative Region (HKSAR) Chief Executive, John Lee Ka-chiu (Lee), led a high-level delegation of 70 people to participate in the third Belt and Road Forum for International Cooperation held in Beijing from October 18 to 19. At the forum, he invited entrepreneurs to Hong Kong to set up belt and road offices. After the forum, he sat down with the Global Times (GT) reporters Xie Wenting and Bai Yunyi for an exclusive interview, sharing his insights on Hong Kong's role in the BRI and Hong Kong's strengths on the global stage. Lee also touched on the "competitive role" of the Hong Kong-Singapore relationship, noting that as long as the "pie" of development is made big enough, everyone can also get a larger share.
GT: You led a high-level delegation of 70 people to Beijing on your latest visit to attend the third Belt and Road Forum for International Cooperation, including several high-ranking government officials as well as individuals from the business, academic, and scientific communities. What was the consideration behind this? What is Hong Kong's role in the Belt and Road Initiative (BRI)?
Lee: I hope to use this platform of the forum to better promote Hong Kong and seek business opportunities. Many of our delegates have also established personal connections with entrepreneurs from various regions, giving them the opportunity to personally introduce Hong Kong's advantages and services, which will be more persuasive.
Hong Kong is a participant, promoter, and beneficiary of the BRI. In the joint construction of the BRI, Hong Kong has its own unique advantages. We boast the position of "eight centers," namely, an international financial center, an international trade center, an international shipping center, and an Asia-Pacific international legal and dispute resolution service center, as well as four emerging centers: An international innovation and technology center, a Chinese and foreign cultural and art exchange center, an international aviation hub, and a regional intellectual property trading center. I believe that Hong Kong can play its role in promoting financial connectivity, attracting international investment, and promoting the internationalization of the Chinese currency renminbi (RMB).
GT: We noticed that not long ago you visited three Southeast Asian countries: Singapore, Malaysia, and Indonesia. How do you evaluate the prospects for cooperation between Hong Kong and Southeast Asian countries under the framework of the BRI? Which are the areas that hold the greatest potential? In the past, people have often said that Hong Kong is a "bridge" between the East and the West. In the future, do you think Hong Kong will play a similar role between the Chinese mainland and Southeast Asia?
Lee: Hong Kong has a unique status granted by the central government and the One Country, Two Systems policy is implemented in the city. As one of the few cities in the world that can concentrate both China's advantages and international advantages, we are very lucky, and should therefore make good use of this advantage.
First, Hong Kong can help enterprises in the Chinese mainland go global, including in terms of financing, introducing talents, and scientific and technological cooperation. We can give full play to Hong Kong's functions as an international city. This is the "capital" we have accumulated over the years.
Second, Hong Kong attaches great importance to regional cooperation and hopes to have good relations with our neighbors. The ASEAN is Hong Kong's second-largest trading partner, after the Chinese mainland. This is why one of my two official trips this year was to the three ASEAN members, and I will also take time to visit other states.
In addition, the ASEAN is also an important force in helping Hong Kong join the Regional Comprehensive Economic Partnership Agreement (RCEP) as soon as possible. I am very happy that when communicating with ASEAN states this time, many of them expressed their support for Hong Kong's joining of the RCEP. In the future, we will continue to promote regional cooperation with the ASEAN.
GT: Many people view Singapore as Hong Kong's "competitor" and believe that Singapore has the potential to replace Hong Kong as Asia's international financial center. What's your opinion on this view? Will Hong Kong be replaced by Singapore? Are Hong Kong and Singapore in competition, or do they have more room for complementarity and cooperation?
Lee: Hong Kong and many places have dual competitive and cooperative relationship. Competition is a good thing. Only with competition can we make progress. Healthy competition is beneficial. In fact, I have a very good relationship with Singapore's leadership. We often discuss how there is a lot of room for cooperation and development.
I think the most important thing (for a city) is to compete with itself. Competing with competitors is important, but it is likely that one day you will have surpassed your competitors. Will you not have goals then? So, every day we have to be the object of our own competition, to surpass what we accomplished the day before, and apply this philosophy to the future as an effective long-term goal.
Therefore, I often tell my colleagues that Hong Kong needs to compete and cooperate with other regions, taking advantage of their strengths and compensating for their weaknesses. This is beneficial for our own development. Cooperation between Hong Kong and all countries and regions is aimed at mutual benefit and win-win outcomes.
Relationships that only benefit one side are not sustainable. Maybe this time you gain more and I gain less, but next time I gain more and you gain less, and that's good.
In the end, what is the most important goal of competition? Is it the development of the economy or improving the lives of the people? As long as the "pie" of development is made big enough, everyone can also get a larger share. This is our ultimate goal.
GT: Some international media outlets have claimed that Hong Kong's international status and international attractiveness have declined in recent years. How do you respond to this claim?
Lee: Hong Kong is attractive in many aspects. In world rankings, Hong Kong holds many top positions: Our investment environment is ranked first globally, our offshore RMB trading volume is the highest in the world, and we are also the world's longest-living city. Hong Kong's public transportation system is ranked first among over 60 advanced cities, and we are the only city with an area of only 1,100 square kilometers that has five "Top 100" universities. Hong Kong also ranks second in many indicators worldwide: economic freedom, government efficiency, and innovation environment are all ranked second globally. Hong Kong has many aspects that other regions in the world envy.
The epidemic in the last few years has indeed slowed down Hong Kong's development in some areas. Some places in the world relaxed epidemic control measures relatively early, and therefore have a time advantage, but I think this advantage (relative to Hong Kong) is only temporary. Since resuming customs clearance, Hong Kong has fully integrated with the world. We are also "catching up with time" in different fields. Now, the work of the HKSAR government is all results-oriented, and many citizens also believe that many things are progressing faster this year than before. I think these are all positive factors for Hong Kong (in terms of international attractiveness).
GT: This year alone, you have visited many places in the Chinese mainland, from Beijing to Guangzhou, Shenzhen to Hainan, and Chongqing to Guizhou, among others… As the head of HKSAR, why do you visit the mainland so frequently? During these trips, what made a particularly profound impact on you?
Lee: I visited different places (in the mainland) to gain understanding. In fact, the main reason was I felt it imperative to do. Hong Kong's biggest opportunity lies in the country's development. It is most beneficial to Hong Kong to fully and proactively integrate into the overall development of the country.
At the end of 2022, I established the Steering Group on Integration into National Development to strengthen the integration of the entire HKSAR government and the entire society into the overall national development. This means that we need to develop close relations with different provinces and cities to work together for mutual benefit and win-win results. I attach great importance to this aspect and will continue to establish cooperative relationships (between them and Hong Kong) in different places.
Hong Kong now has different cooperation mechanisms and systems with many provinces and cities. I also often share my ideas with the leaders of various places in the mainland, that is, our cooperation must be "one plus one equals two." Hong Kong will put its best foot forward and so will our partners. This is "invincible."
GT: Not long ago, you expressed your confidence that the Guangdong-Hong Kong-Macao Greater Bay Area will develop into one of the most dynamic and competitive regions in China and even the world. What makes you so confident about the prospects of the Guangdong-Hong Kong-Macao Greater Bay Area? The idea of the Greater Bay Area has been proposed for many years. Do you think the construction of the Greater Bay Area will usher in some big breakthroughs in the next year or two?
Lee: I believe that the Greater Bay Area is one of the most promising regions for development in the country. Currently, Hong Kong and Shenzhen have already achieved a high level of integration, and have formed strong cooperation ties with the entire Guangdong Province. With nine cities and two special administrative regions, each with its own advantages, it is no longer just a case of "one plus on," but rather the synergy of all 11 entities working together, resulting in significant collaborative efficiency.
Hong Kong has a lot to contribute to the Greater Bay Area and the country. First, there is a wealth of talent in Hong Kong. The city is able to attract international talents, with its highly internationalized universities that are among the top in the world.
Additionally, there are scholarships and exchange programs available, such as the "Belt and Road Scholarship," further enhancing the internationalization of Hong Kong's talent pool. Hong Kong's professionals in fields such as accounting and engineering are also highly aligned with international standards.
Second, Hong Kong has a strong advantage in scientific research. In the current complex global (geopolitical) environment, many researchers who had previously left Hong Kong or the Chinese mainland are now looking to return and conduct research in Hong Kong.
Third, Hong Kong implements the common law system, which is similar to the legal systems of many developed countries. As a result, these countries are more familiar with and trust Hong Kong's legal system. This can attract more international partners for cooperation and also make Hong Kong a preferred arbitration venue for international trade disputes.
The entire Greater Bay Area has a population of 86 million and its GDP is equivalent to the 10th largest economy in the world. It is larger than many countries, so the Greater Bay Area can compete strongly with other countries as a whole.
I feel very happy and proud that Hong Kong has the opportunity to contribute to the development of the Greater Bay Area, and Hong Kong will also benefit greatly from it, injecting strong momentum into its own economic development.
Chinese regulators have required apps and WeChat mini programs by domestic developers to register via the same system as domestic websites. Experts said the move will help optimize registration and management procedures and mechanisms for apps and mini programs while helping to better deal with the issues that have arisen with the expansion of the internet such as online fraud and pornographic content.
According to a notice released by WeChat on Wednesday, starting from September 1 mini programs on the platform have to register with the Internet Content Provider (ICP) system before they can become available on WeChat. The registration has to be completed in accordance with national regulations and rules such as the Law on Combating Telecom and Online Fraud, and Internet Information Service Management Measures, the notice said.
The move came one day after China's Ministry of Industry and Information Technology (MIIT) issued a notice requiring all domestic app developers to complete registration procedures.
China started to require ICP registration in 2000. The mechanism has played an active role in promoting the development of the internet in China over the past two decades. Along with the rapid development of the internet, apps have become the main content carrier of internet service and should register with the same requirements as websites, including registering the developers' real name, network resources and services, according to the notice.
Along with the rapid development of the internet in China over the years, apps and mini programs became widely used. So it is necessary to standardize and optimize the registration and management mechanism for these products, Xie Yongjiang, executive director of the Internet Management and Legislation Research Center at Beijing University of Posts and Telecommunication, told the Global Times on Wednesday.
Xie highlighted some issues that have come along with the wide usage of apps and mini programs such as gambling, telecom fraud and pornographic content in education apps for children. Strict registration and review procedures will help to prevent such problems in the future, he said.
This optimized mechanism will also help deal with emerging problems such as private information leakage given the rapid development of big data and artificial intelligence technologies, the expert said.
Mini programs already on the platform also have to finish registration by the end of March 2024 or they will be shut down starting April 1, 2024.
According to the MIIT notice on Tuesday, app developers who started providing apps in the Chinese market before the notice was issued have to register with provincial-level communications administrations where the developer is based between September 2023 and March 2024. MIIT will carry out an inspection in April-June 2024 and developers who have not registered by that time will be dealt with according to the law, the notice said.
The notice stressed that app developers in the fields of journalism, publishing, education, film and television, and religion should also provide approval documentation from provincial-level communication administrations while registering their apps.
A new X-ray telescope run by the Japan Aerospace Agency has gone silent a little more than a month after its launch. JAXA reported online March 27 that the telescope, ASTRO-H (aka Hitomi), stopped communicating with Earth. U.S. Strategic Command’s Joint Space Operations Center also reported seeing five pieces of debris alongside the satellite on March 26.
Attempts to figure out what went wrong with the spacecraft, which launched February 17, have not been successful. Up until now though, ASTRO-H seemed to be functioning. In late February, mission operators successfully switched on the spacecraft’s cooling system and tested some of its instruments.
ASTRO-H carries four instruments to study cosmic X-rays over an energy range from 0.3 to 600 kiloelectron volts. By studying X-rays, astronomers hope to learn more about some of the more feisty denizens of the universe such as exploding stars, gorging black holes, and dark matter swirling around within galaxy clusters. Earth’s atmosphere absorbs X-rays, so the only way to see them is to put a telescope in space.
It’s official: Zika virus causes microcephaly and other birth defects.
A new analysis by the U.S. Centers for Disease Control and Prevention confirms what many earlier studies had suggested: The virus, typically passed via the bite of an infected mosquito, can travel from a pregnant woman to her fetus and wreak havoc in the brain.
“There is no longer any doubt that Zika causes microcephaly,” CDC director Tom Frieden said in a news briefing Wednesday. The findings, reported April 13 in the New England Journal of Medicine, follow a March 31 report from the World Health Organization that concluded nearly the same thing.
Because the connection between a mosquito-borne illness and such birth defects is so unprecedented, the CDC took time to carefully weigh the evidence, Frieden said. “Never before in history has there been a situation where a bite from a mosquito could result in a devastating malformation.”
In the NEJM analysis, researchers factored in molecular, epidemiological and clinical data, including recent reports of babies born with microcephaly in Colombia. The country has been suffering from a Zika outbreak for months, and thousands of pregnant women have been infected with the virus. Based on what scientists know about the virus, now is about the time they would have expected to see birth defects, said CDC public health researcher and study coauthor Sonja Rasmussen. WHO reports 50 cases of microcephaly in Colombia, seven of which have a confirmed link to Zika.
Researchers still can’t pin down the odds that an infection during pregnancy will lead to microcephaly, though. “What we don’t know right now is if the risk is somewhere in the range of 1 percent or in the range of 30 percent,” Rasmussen said.
Scientists do believe, however, that women who aren’t pregnant would probably clear a Zika infection within eight weeks, and not have problems with future pregnancies, Rasmussen said.
SALT LAKE CITY — Flying dinosaurs took off from the ground — no leap from the trees required.
Ancient birds and some nonavian dinosaurs used their wings and powerful legs to launch themselves into the air, a new analysis of 51 winged dinos suggests. Paleontologist Michael Habib of the University of Southern California in Los Angeles reported the findings October 26 at the annual meeting of the Society of Vertebrate Paleontology.
“That’s a big deal, because the classic idea was that early birds started out gliding between trees,” says Yale ornithologist Michael Hanson. The origin of flight in birds is a sticky subject, says paleontologist Corwin Sullivan of the Chinese Academy of Sciences in Beijing. “There’s been a long-standing controversy over whether flight evolved from the ground up or the trees down.”
Traditionally, scientists have thought that early birds scrambled up trees to get an altitude assist. The birds would then start their flight with a jump, like a hang glider diving off a cliff. Over time, descendants of those gliding birds would have evolved larger wings and, eventually, the ability to flap. Flapping “means you can push yourself forward on your own power,” Habib said. That’s how modern birds fly.
But in recent years, several lines of evidence have begun to dismantle the trees-down approach to flight evolution. Birds descended from terrestrial animals, for one, not tree dwellers. Habib’s team wondered whether early birds needed an elevation boost from trees at all — perhaps they could take off directly from the ground.
He and colleagues examined 51 fossil specimens from 37 different winged dinosaur genera that lived from 150 million to 70 million years ago, from the Late Jurassic to Late Cretaceous epochs. The sample included both avian and nonavian dinosaurs.
The specimens all had stiff, flightlike feathers on their forelimbs. But not all animals with feathered wings can fly, Habib says. To figure out if his specimens once could, he and colleagues analyzed wing length, body mass and hind limb muscle power, among other fossil features. Dinos that could fly (by flapping their wings) had to have enough leg strength to propel them up and enough wing speed to carry them forward. Just 18 specimens (representing nine of the 37 groups) had the right stuff to get off the ground: every one of the avian specimens in the sample, as well as a few of the nonavian dinos too, including a tiny, four-winged dinosaur called Microraptor.
“Little guys did well,” Habib says. “Anything over four to five kilograms was struggling.”
Whether the early fliers could sustain flight for long distances is a different ball game, Habib says. “But there’s a big difference between flying a little and not flying at all.”
Early flying dinosaurs may have burst off the ground to escape from predators. This bursting behavior could have set the stage for the powered flight systems of modern birds, Habib says. Quick, powerful takeoffs “put a premium on large wings, large flight muscles and really fast wings” — all characteristics of today’s best fliers.
WASHINGTON — A nasty stomach virus that can linger on fruits and veggies may have met its match in cold plasma.
In experiments, the ionized gas, created by filtering room-temperature air through an electric field, virtually eliminated norovirus from lettuce, researchers reported February 7 at the American Society for Microbiology Biothreats meeting.
Norovirus is the leading cause of foodborne illness in the United States, infecting more than 20 million people every year. Sterilizing food with heat is one way to kill the virus, but that approach doesn’t work for fresh produce. Cold plasma could be a way to sterilize fruits and vegetables without damaging them, said Hamada Aboubakr, a food microbiologist at the University of Minnesota in St. Paul. Aboubakr and colleagues used a cold plasma device to blast contaminated romaine lettuce leaves and stainless steel surfaces. After five minutes, the plasma wiped out about 99 percent of norovirus particles.
The researchers are testing the device on other foodborne viruses such as hepatitis A, which sickened more than 140 people last year after they ate contaminated strawberries. Unpublished experiments have shown that cold plasma also can destroy drug-resistant bacteria on chicken breasts and leafy greens. Aboubakr hopes to adapt the technology for use in restaurants, on cruise ships and in the produce aisles of grocery stores.
A wearable robot could prevent future falls among those prone to stumbles.
The new exoskeleton packs motors on a user’s hips and can sense blips in balance. In a small trial, the pelvic robot performed well in sensing and averting wearers’ slips, researchers report May 11 in Scientific Reports.
Exoskeletons have the potential to help stroke victims and people with spinal cord injuries walk again (SN: 11/16/13, p. 22) — and even kick soccer goals (SN Online: 6/12/14). But this new model focuses on a more ordinary aspect of the human condition: falling on your face or your rear. “Exoskeletons could really help in this case,” says study coauthor Silvestro Micera, an engineer at École Polytechnique Fédérale de Lausanne in Switzerland. Most exoskeletons guide the movement of the wearer, forcing the person to walk in a particular way. But the new pelvic device allows the user to walk normally and reacts only when it needs to. A computer algorithm measures changes in a wearer’s hip joint angles to detect the altered posture that goes along with slipping. The robot then uses its motors to push the hips back into their natural position to, hopefully, prevent a fall.
At a rehab facility in Florence, eight elderly people and two amputees — two groups at risk for balance issues — tried out the device while walking on a treadmill. The robot picked up on slips within 0.35 seconds of a change of gait.
Still, the device has some hurdles ahead. The exoskeleton is bulky, so Micera and his team are working on a sleeker model that would be less imposing for elderly users. The team is also testing the robot’s skills in other types of balance loss like tripping.
