【推荐1】Suppose you become a leader in an organization. It’s very likely that you’ll want to have volunteers to help with the organization’s activities. To do so, it should help to understand why people undertake volunteer work and what keeps their interest in the work.

Let’s begin with the question of why people volunteer. Researchers have identified several factors that motivate people to get involved. For example, people volunteer to express personal values related to unselfishness, to create various experiences, and to strengthen social relationships. Therefore, to select volunteers, you may need to understand the motivations of the people you wish to attract.

A few people also volunteer because they are required to do so. To increase levels of community service, some schools have launched compulsory volunteer programs. Unfortunately, these programs can shift people’s wish of participation from an internal factor (e.g., “I volunteer because it’s important to me”) to an external factor (e.g., “I volunteer because I’m required to do so”). When that happens, people become less likely to volunteer in the future.

Once people begin to volunteer, what leads them to remain in their positions over time? After following 238 volunteers in Florida over a year, one study found that one of the most important factors influencing their satisfaction as volunteers was the amount of suffering they experienced in their volunteer positions. The result leads to important practical advice – attention should be given to “training that would prepare volunteers for troublesome situations or provide them with strategies for coping with the problems they do experience”.

Another study of 302 volunteers at hospitals in Chicago focused on individual differences in the degree to which people view “volunteer” as an important social role. It was assumed that those people for whom the role of volunteer was most part of their personal identity would also be most likely to continue volunteer work. The assumption was supported by the result, which once again leads to concrete advice: “Once an individual begins volunteering, continued efforts might focus on developing a volunteer role identity...Items like T-shirts that allow volunteers to be recognized publicly for their contributions can help strengthen role identity.”

【推荐2】The elderly residents (居民) in care homes in London are being given hens to look after to stop them feeling lonely.

The project was dreamed up by a local charity (慈善组织) to reduce loneliness and improve elderly people’s wellbeing, It is also being used to help patients suffering dementia, a serious illness of the mind. Staff in care homes have reported a reduction in the use of medicine where hens are in use.

Among those taking part in the project is 80-year-old Ruth Xavier. She said: “I used to keep hens when I was younger and had to prepare their breakfast each morning before I went to school. ”

“I like the project a lot. I am down there in my wheelchair in the morning letting the hens out and down there again at night to see they’ve gone to bed.”

“It’s good to have a different focus. People have been bringing their children in to see the hens and residents come and sit outside to watch them. I’m enjoying the creative activities, and it feels great to have done something useful.”

There are now 700 elderly people looking after hens in 20 care homes in the North East, and the charity has been given financial support to roll it out countrywide.

Wendy Wilson, extra care manager at 60 Penfold Street, one of the first to embark on the project, said: “Residents really welcome the idea of the project and the creative sessions. We are looking forward to the benefits and fun the project can bring to people here.”

Lynn Lewis, director of Notting Hill Pathways, said: “We are happy to be taking part in the project. It will really help connect our residents through a shared interest and creative activities.”

【推荐1】In the near future, IoT (Internet of Things) will drive huge innovation (革新) in the way our food is grown. Plants will have a “voice”, not a human voice, but a voice based on data that can tell people, computers, and machines when, for example, they are thirsty, or need more sun, medicine, etc.

Take vertical (垂直的) farms, for example. Farming is moving indoors where the growth of plants can be monitored and controlled. The facilities are built vertically, so growing areas can be put in piles. This greatly reduces the amount of land needed for farming.

From an IoT point of view, vertical farms are connected in two ways. First, small sensors (传感器) in the soil or connected to plants tell a control system exactly how much light, water, and nutrients are needed to grow the healthiest crops. Sensors will also tell vertical farmers when crops are nearing their peak for harvesting at just the right time to make sure it’s still fresh when it reaches its final destination.

Second, vertical farms will be connected to other networks and information systems, including databases that track local demand. For example, local restaurants may input when they need fresh food supplies. And vertical farmers could get that information so they know which crops to grow in what quantities. This type of IoT system would have been unimaginable a generation ago.

Today, vertical farms are being experimented. Yet, the numbers point to a bright future for the industry, especially as the world’s population continues to grow. For example, Green Sense Farms in Chicago is able to harvest crops 26 times a year using 85 percent less energy, one-tenth the water, and no pesticides. A side benefit of lower energy use is lower CO₂ output of two tons per month, with the added benefit of creating 46 pounds of oxygen every day.

【推荐2】Recently, researchers at the University of Toronto figured out a way with a quick video selfie to accurately measure blood pressure with your smartphone’s camera by developing a technology known as transdermal optical imaging (TOI)(透皮光学成像).

Cameras on smartphones can catch red light reflected from hemoglobin (血红素）under our skin, which permits TOI to visualize and measure blood flow changes. Researchers measured the blood pressure of 1,328 Canadian and Chinese adults by getting two-minute videos of their faces on an iPhone. “From the video got by the technology, you can see how the blood flows in different parts of the face and through this flow, you can get a lot of information,” said Kang Lee, lead author of the study.

Lee also helped create an app called Anura, which allows people to try out the TOI software for themselves, giving them the ability to record a 30-second video of their face and receive measurements for stress levels and resting heart rate. Lee said more research was needed to make sure that the measurements were as accurate as possible, explaining that the study didn’t test people with very dark or very fair skin.

“In order to improve our app to make it usable, particularly for people with hypertension (高血压)，we need to collect a lot of data from them, which is very hard because a lot of them are already taking medicine,” Lee explained. “We cannot tell them not to take medicine, but from time to time, we get participants who don’t take medicine so we can get hypertensive people this way.”

The scientists said there were many potential applications of the technology, including providing health services for those who lived in remote areas.