A recent study led by researchers from the National University of Singapore(NUS)has found a clear link between the color of a taxi and its accident rate. An analysis of 36 months of detailed taxi, driver and accident data from two fleets of yellow and blue taxis in Singapore suggested that yellow taxis have fewer accidents than blue taxis. The higher visibility (能见度)of yellow makes it easier for drivers to avoid getting into accidents with yellow taxis, leading to a lower accident rate.

    The study was led by Prof Ho. To test whether there was a causal relationship between the color of a taxi and the number of accidents the taxi had, the research team analysed data collected by the largest taxi company in Singapore. The researchers found that yellow taxis have about 6.1 fewer accidents per 1,000 taxis per month.

    The researchers also studied the economic effect of changing the color of the entire fleet of taxis to yellow. The Singapore taxi company involved in the study owns about 16,700 taxis in a ratio(比例) of one yellow to three blue taxis. If a commercial decision is made to switch from blue to yellow taxis, 76.6 fewer accidents would occur per month or 917 fewer accidents per year. Assuming an average repair cost of $1,000 per car and a downtime of six days, switching the color of all taxis to yellow could produce an annual savings of $2 million.

    “We are eager to continue to validate(证实) the findings of our study by looking at the use of yellow in other types of public transport, such as school buses. For instance, we hope to compare the accident rates of yellow school buses against other colors to find out if yellow is indeed a safer color for school buses. Besides, we are also interested to look at private-hire vehicles and do a comparison of the accident rates of vehicles that are of different colors,” explained Prof Ho.

    What will people die of 100 years from now? If you think that is a simple question, you have not been paying attention to the revolution that is taking place in bio-technology(生物技术). With the help of new medicine, the human body will last a very long time. Death will come mainly from accidents, murder and war. Today's leading killers, such as heart disease, cancer, and aging itself, will become distant memories.

    In discussion of technological(技术的) changes, the Internet gets most of the attention these days. But the change in medicine can be the real technological event of our times. How long can humans live? Human brains were known to decide the final death. Cells are the basic units of all living things, and until recently, scientists were sure that the life of cells could not go much beyond 120 years because the basic materials of cells, such as those of brain cells, would not last forever. But the upper limits will be broken by new medicine. Sometime between 2050 and 2100, medicine will have advanced to the point at which every 10 years or so, people will be able to take medicine to repair their organs（器官）. The medicine, made up of the basic building materials of life, will build new brain cells, heart cells, and so on—in much the same way our bodies make new skin cells to take the place of old ones.

    It is exciting to imagine that the advance in technology may be changing the most basic condition of human existence, but many technical problems still must be cleared up on the way to this wonderful future.

        Let us all raise a glass to AlphaGo and the advance of artificial intelligence. AlphaGo, DeepMind's Go-playing AI, just defeated the best Go-playing human, Lee Sedol. But as we drink to its success. We should also begin trying to understand what it means for the future.

    The number of possible moves in a game of Go is so huge that in order to win against a player like Lee. AlphaGo was designed to adopt a human—like style of gameplay by using a relatively recent development--deep learning. Deep learning uses large data sets, “machine learning” algorithms （计算程序） and deep neural networks to teach the AI how to perform a particular set of tasks. Rather than programming complex Go rules and strategies into AlphaGo, DeepMind designers taught AlphaGo to play the game by feeding it data based on typical Go moves. Then, AlphaGo played against itself, tirelessly learning from its own mistakes and improving its gameplay over time. The results speak for themselves.

    Deep learning represents a shift in the relationship humans have with their technological creations. It results in AI that displays surprising and unpredictable behaviour. Commenting after his first loss, Lee described being shocked by an unconventional move he claimed no human would ever have made. Demis Hassabis. one of DeepMind's founders, echoed this comment：“We're very pleased that AlphaGo played some quite surprising and beautiful moves.”

    Unpredictability and surprises are—or can be—a good thing. They can indicate that a system is working well, perhaps better than the humans that came before it. Such is the case with AlphaGo. However, unpredictability also indicates a loss of human control. That Hassabis is surprised at his creation's behaviour suggests a lack of control in the design. And though some loss of control might be fine in the context of a game such as Go, it raises urgent questions elsewhere.

    How much and what kind of control should we give up to AI machines? How should we design appropriate human control into AI that requires us to give up some of that very control? Is there some AI that we should just not develop if it means any loss of human control? How much of a say should corporations, governments, experts or citizens have in these matters? These important questions, and many others like them, have emerged in response, but remain unanswered. They require human, not human - like, solutions.

    So as we drink to the milestone in AI, let's also drink to the understanding that the time to answer deeply human questions about deep learning and AI is now.

    There were smiling children all the way. Clearly they knew at what time the train passed their homes and they made it their business to stand along the railway, wave to complete strangers and cheer them up as they rushed towards Penang. Often whole families stood outside their homes and waved and smiled as if those on the trains were their favorite relatives. This is the simple village people of Malaysia. I was moved.

    I had always traveled to Malaysia by plane or car, so this was the first time I was on a train. I did not particularly relish the long train journey and had brought along a dozen magazines to read and reread. I looked about the train. There was not one familiar face. I sighed and sat down to read my Economics.

    It was not long before the train was across the Causeway and in Malaysia. Johore Baru was just another city like Singapore, so I was tired of looking at the crowds of people as they hurried past. As we went beyond the city, I watched the straight rows of rubber trees and miles and miles of green. Then the first village came into sight. Immediately I came alive; I decided to wave back.

    From then on my journey became interesting. I threw my magazines into the waste basket and decided to join in Malaysian life. Then everything came alive. The mountains seemed to speak to me. Even the trees were smiling. I stared at everything as if I was looking at it for the first time.

    The day passed fast and I even forgot to have my lunch until I felt hungry. I looked at my watch and was surprised that it was 3:00 pm. Soon the train pulled up at Butterworth. I looked at the people all around me. They all looked beautiful. When my uncle arrived with a smile, I threw my arms around him to give him a warm hug (拥抱). I had never done this before. He seemed surprised and then his weather-beaten face warmed up with a huge smile. We walked arm in arm to his car.

    I looked forward to the return journey.

    Nurses are required in all areas of the medical field from hospitals and nursing homes to schools and the armed forces, leading to a great need of certified nurses. Here are some best universities for a degree in nursing.

    Simmons College

    Simmons College is a private women's college founded in Boston in 1899. Nursing is the top-ranked major at the school as well as the most popular. The nursing graduates from Simmons make about $58,000 every year.

    Villanova University

    Villanova University is a research university located in Radnor Township, Pennsylvania. Named after Saint Thomas of Villanova, the school is the oldest Catholic university in Pennsylvania. Nursing is a popular major and is offered as an online degree as well. The nursing graduates from Villanova make about $63,000 every year.

    University of California, Los Angeles

    The UCLA School of Nursing is known for its excellent education provided by a group of leaders in the medical field. The four-year program allows students to be qualified nurses through classroom learning and clinical training. A nursing degree from UCLA leads to positions in many hospitals and clinics, with a yearly income of about $84,000.

    New York University

    New York University attaches great importance to real-world experience. Along with taking classes in school, students mainly work in the health care environment receiving technical training Additionally, NYU College of Nursing students have the chance to study in Abu Dhabi, China and other countries in Africa, Asia, Europe and South America. The education from NYU will prepare students to help doctors treat patients, earning a yearly income of about $86,000.

Four things that you can't miss in Macao

    Go Bungee Jumping at the Macao Tower

    The Macao Tower, 338 meters tall, is the world's 10th highest tower, with kinds of activities, such as eating and entertainment. One of the activities is the bungee jump. The Macao Tower Bungee Jump is 233 meters high, making it a Guinness World Record as the highest commercial bungee jump in the world. Raise your arms and off you go! If you are not daring enough to jump that height, you can try the sky walk on the 57th floor—it's still amazing. Take this chance and tick off this item on your list.

    Enjoy a traditional Portuguese dinner

    Macao was once colonized (殖民) by Portugal before 1999. As a result, Portuguese culture has deeply affected Macao.

    Many Portuguese settled and opened Portuguese restaurants here, but it is more adaptable to Chinese people.

    Visit a museum

    Macao, as a little city with only an area of 30.5 square kilometers, has 23 eye-catching museums. Due to its special history, both eastern and western historical relics can be found. Many of them are preserved for cultural relics, tourist spots or museums, such as the Grand Prix Museum, Maritime Museum and Wine Museum.

    Go into an entertainment place

    Well known as the "Las Vegas of the Orient", Macao has 33 entertainment places. You can find different themed entertainment places with their hotels and attractions around every corner of Macao, especially on Taipa Island. Among all, The Venetian is the most popular. With a huge shopping mall and Vegas-style design, it is a must-go place for both tourists and locals to shop and enjoy free time. So when you come to Macao, just walk around and you will still be amazed.