I am peter Hodes ,a volunteer stem courier. Since March 2012, I've done 89 trips of those , 51 have been abroad, I have 42 hours to carry stem cells（干细胞）in my little box because I've got two ice packs and that's how long they last, in all, from the time the stem cells are harvested from a donor(捐献者) to the time they can be implanted in the patient, we've got 72 hours at most, So I am always conscious of time.

I had one trip last year where I was caught by a hurricane in America. I picked up the stem cells in Providence, Rhode Island, and was meant to fly to Washington then back to London. But when I arrived at the check-in desk at Providence, the lady on the desk said: “Well, I'm really sorry, I've got some bad news for you-there are no fights from Washington.” So I took my box and put it on the desk and I said: “In this box are some stem cells that are urgently needed for a patient-please, please, you've got to get me back to the United Kingdom.” She just dropped everything. She arranged for a flight on a small plane to be held for mere-routed(改道)me through Newark and got me back to the UK even earlier than originally scheduled.

For thiscourier job, you're consciously aware than that box you're got something that is potentially going to save somebody's life.

    China's largest search engine Baidu has said it will make its latest artificial intelligence (AI) technology accessible to developers and businesses as part of the company's latest move into AI, big data and cloud computing.

    AI solution "Tianzhi" was launched at a cloud-computing summit held in Beijing Wednesday. It includes services in three fields: sensing technology, such as image and voice processing, machine learning, and deep learning, an advanced form of machine learning, said Zhang Yaqin, CEO of the Nasdaq-listed company, at the summit.

    Developers can access facial or voice recognition, algorithms(演算法) for data analysis and projections, and deep learning applications, Zhang said, adding that the technology could help users innovate in their sectors.

    "With more devices connected to the cloud, enterprises will use cloud computing and AI more frequently," said Wu Hequan, an academician at the Chinese Academy of Engineering, "Open AI technology can play a bigger role."

    The company also revealed a plan to invest 10 billion yuan (1.45 billion U.S. dollars) in cloud computing in the next five years and establish an innovation center, which will serve 10 million enterprises.

    The Healthy Habits Survey（调查）shows that only about one third of American seniors have correct habits. Here are some findings and expert advice.

1). How many times did you brush your teeth yesterday?

Finding：A full 33% of seniors brush their teeth only once a day.

Step：Remove the 300 types of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day.

2). How many times did you wash your hands or bathe yesterday?

Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30%wash their hands only 4 times a day-half of the number doctors recommend.

Step：We touch our faces around 3, 000 times a day-often inviting germs（病菌）to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.

3). How often do you think about fighting germs?

Finding：Seniors are not fighting germs as well as they should.

Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海绵）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.

    Whether in the home or the workplace, social robots are going to become a lot more common in the next few years. Social robots are about to bring technology to the everyday world in a more humanized way, said Cynthia Breazeal, chief scientist at the robot company Jibo.

    While household robots today do the normal housework, social robots will be much more like companions than mere tools. For example, these robots will be able to distinguish when someone is happy or sad. This allows them to respond more appropriately to the user.

    The Jibo robot, arranged to ship later this year, is designed to be a personalized assistant. You can talk to the robot, ask it questions, and make requests for it to perform different tasks. The robot doesn't just deliver general answers to questions; it responds based on what it learns about each individual in the household. It can do things such as reminding an elderly family member to take medicine or taking family photos.

    Social robots are not just finding their way into the home. They have potential applications in everything from education to health care and are already finding their way into some of these spaces.

Fellow Robots is one company bringing social robots to the market. The company's “Oshbot” robot is built to assist customers in a store, which can help the customers find items and help guide them to the product's location in the store. It can also speak different languages and make recommendations for different items based on what the customer is shopping for.

    The more interaction the robot has with humans, the more it learns. But Oshbot, like other social robots, is not intended to replace workers, but to work alongside other employees.“We have technologies to train social robots to do things not for us, but with us,” said Breazeal.

    The city of San Francisco is a wonderful tourist attraction that offers many different things to see and do. The best way for a traveler to get a good look at the city is to take one of the many different tours there.

    Tour the City on Foot

    When touring the city by walking, you aren't going to walk much. What's more, there are far more benefits. This kind of tour allows you to see as many buildings of the city as possible. A tour of the city on foot usually focuses on a more localized neighborhood level, which can be very interesting in a number of different ways.

    Hit the Waters of San Francisco Bay

    The waters of San Francisco Bay have played an important role in the city s development over the last century, Touring San Francisco from the water is a completely unique way for you to see this wonderful city.

    Take a Bus Tour

    If you want to see a wide variety of attractions from all over the city, one of the best things you could do is to book a tour through our company that offers services here. A bus tour of San Francisco is one of the most complete ways to experience the city

    Tour San Francisco from the Air

    While it is one of the most expensive ways to see San Francisco, touring the city from the air is one of the most unique and thrilling ways to see the city. Seeing the city from high above allows you to get a full view of the city as tour guides point out attractions from high above. If you do decide to tour San Francisco by air, you'll be creating memories that you won't forget forever.

    We are a travel agency providing high-quality services and discounts. For more information, please click here.

    In 1963, at age 65, my grandfather, Erwin, decided to build a new house. He wasn't quite sure what to do with the old house since it sat where the new house would be. He finally hired a powerful vehicle to push it far out into a small group of trees. That old house sits there to this very day.

    Erwin and his wife, Elida, passed away, and I purchased the farm from their estate. My wife and I raised our sons on this place and have lived here for more than 30 years. When we first moved in, my wife took one look at the deserted house and declared it a hidden danger. I agreed and planned on a large bonfire. But I thought it appropriate to check out the house first, just in case something of worth had been left behind.

    I walked through the tall grass in the meadow where the old house sat. Time had worn it out. The entrance floor had fallen down on itself and most of the windows were gone. We entered through an open window. ①Here lay the reminders of my grandparents' lives: a broken chair, some old clothes ... But the thing that drew my eye was a cardboard box stuffed with papers. I dug through its contents and was instantly transported back in time. There was a tax return from 1957. Greeting cards from old friends and relatives, now all dead and gone. An uncle's third-grade spelling book. So sweet were the memories that the old house was spared the torch.

    As we hurried through our lives, my visits grew infrequent. I might catch a glimpse of the house through the trees and remembered how, as a child, I would struggle to walk in my father's footprints. Even then, I could imagine no nobler calling than farming, just like Dad. Then, one April morning, my father was felled by a massive heart attack, at age 68. The entire family was shocked by his passing, none more than me. Why I visited that old house on a day shortly after my father's funeral is still beyond me. It was as though it were calling; even the trees seemed to whisper an invitation to come, to visit, to stay awhile.

    ②As I stood once again on that ancient floor, my eye was drawn to a pile of papers on the floor. An envelope, yellowed with age, lay on top. A blue stamp on the envelope read "Passed by Naval Censor" How could I have missed this treasure? My father had served aboard the USS Washington during World War II and had written home whenever he could. My grandmother saved all of his letters.

    I removed one letter carefully from its envelope. ③It was dated September 1944. My father would have been somewhere in the South Pacific at that time and all of 18 years old. T studied the familiar handwriting. Dad wondered how the com harvest had been. He supposed that his youngest brother was starting first grade and imagined that he was becoming quite the little man. He asked his mother to greet everyone and said that he missed them all.

    It wasn't hard to read between the lines. Here was a homesick young man, a kid really, who had spent his entire life living upon a sea of flat land grass. Now he was on a different kind of sea, an ocean that was being disturbed by the thunder and the lightning of a world at war. At the bottom of the page, my father had passed on one last message. ④Tears burned my eyes as I read those words he had so carefully emphasized: "All is well here. Please don't worry. I am doing fine."

    As I left the old house that day, I took one last glance back at it over my shoulder. I don't care what any one thinks, I decided. That old house gets to stay there until it rots into the earth.