【推荐1】Open data-sharers are still in the minority in many fields. Although many researchers broadly agree that public access to raw data would accelerate science, because other scientists might be able to make advances not foreseen by the data's producers, most are reluctant to post the results of their own labours online (see Nature 461, 160-163; 2009). When Wolkovich, for instance, went hunting for the data from the 50 studies in her meta-analysis, only 8 data sets were available online, and many of the researchers whom she e-mailed refused to share their work. Forced to extract data from tables or figures in publications, Wolkovich's team could conduct only limited analyses

Some communities have agreed to share online - geneticists, for example, post DNA sequences at the GenBank repository, and astronomers are accustomed to accessing images of galaxies and stars from, say, the Sloan Digital Sky Survey, a telescope that has observed some 500 million objects - but these remain the exception, not the rule. Historically, scientists have objected to sharing for many reasons: it is a lot of work; until recently, good databases did not exist; grant funders were not pushing for sharing; it has been difficult to agree on standards for formatting data and the contextual information called metadata; and there is no agreed way to assign credit for data.

But the barriers are disappearing in part because journals and funding agencies worldwide are encouraging scientists to make their data public. Last year, the Royal Society in London said in its report Science as an Open Enterprise that scientists need to shift away from a research culture where data is viewed as private preserve. Funding agencies note that data paid for with public money should be public information, and the scientific community is recognizing that data can now be shared digitally in ways that were not possible before. To match the growing demand, services are springing up to make it easier to publish research products online and enable other researchers to discover and cite them.

Although exhortations to share data often concentrate on the moral advantages of sharing, the practice is not purely altruistic. Researchers who share get plenty of personal benefits, including more connections with colleagues, improved visibility and increased citations. The most successful sharers - those whose data are downloaded and cited the most often - get noticed, and their work gets used. For example, one of the most popular data sets on multidisciplinary repository Dryad is about wood density around the world; it has been downloaded 5,700 times. Co-author Amy Zanne, a biologist at George Washington University in Washington DC, thinks that users probably range from climate-change researchers wanting to estimate how much carbon is stored in biomass, to foresters looking for information on different grades of' timber. "I would much prefer to have my data used by the maximum number of people to ask their own questions," she says "It's important to allow readers and reviewers to see exactly how you arrive at your results. Publishing data and code allows your science to be reproducible ".

【推荐2】Research shows that isolation (隔绝) is bad for us and associated with certain diseases including depression, high blood pressure and heart disease. Yet teenagers seek isolation by using the device of our times-a screen, screens of all kinds. However, in whatever form, screens are addictive, and addictive from an early age. Research has shown that given the chance, six-month-old babies prefer screens to real human faces.

Hand in hand with this addiction to screens, we are seeing an explosion of teenage mental health problems. Social media claims to be inclusive (包容), keeping you connected. But it’s not. It isolates you from real people. Screens have even been described as being poisonous for teenagers.

Psychologist Jean Twenge, a professor at San Diego State University, believes today’s teenagers are “on the edge” of a major mental health crisis and requests, “do anything that doesn’t involve a screen”. The problem is, she claims, children born between 1995 and 2012 have grown up with a smart phone in their hands, and it has changed so many aspects of their lives. The number of teenagers who actually see their friends frequently has dropped by more than 40% since 2000. In 2015, only 56% of 17-year-old went on a date, down from 85%. Modern teenagers are slower to learn to drive, or earn money and spend more time at home. They’re “on their phone, in their room, alone and often depressed”, she says.

Some critics (评论家), however, say we should encourage our children to spend more time online. Robert Hannigan, former director of GCHQ, said in August that Britain is badly short of engineers and computer scientists, and urged children to develop cyber skill to compete in the digital economy.

I’m not the first to say that social media is inferior to real human contact, and harms mental health. Studies show teens who spend three hours a day online are 35% more likely to suicide (自杀). The suicide rate among girls aged 12 to 14 has more than doubled in a decade.

【推荐3】Most smartphones allow you to run location­sharing software that uses the phone's GPS capability to let friends and family know your exact location. There are lots of great uses for this technology.     1     So make sure you're permitted to use an app or service, and pay attention to how you are using it. Here're some important points you may find helpful.

Choose what's best for you. Some location­sharing services are games that let you give a shout­out when you've turned up at a particular spot.     2     Still others continue to share your location until you change the setting. Be sure you know exactly how your service shares your location.

Know who your friends are.     3     This means people can search to see if you're online and add you as a friend. It's important to remember that sharing your location with people you've never met in real life is risky, so you should carefully manage friend requests and share your location only with people you know and trust.

    4     Some services automatically stop sending your location after a period of time, but others will send it forever — until you stop it. Review your contact list periodically and delete anyone to whom you no longer feel comfortable revealing your location.

Update parents. Location­based services are a great way for teens to let parents know where they are without having to call or text.     5     If you're heading home late at night, you can also use a service like Glympse to share your location as you drive, so they'll know if you have car trouble or get stuck in traffic.