Generally speaking, college graduation brings both the satisfaction of academic achievement and the expectation of a well-paid job. But for 6,000 graduates at San Jose State this year, there's uncertainty as they enter one of the worst job markets in decades.

    Ryan Stewart has a freshly minted degree in religious studies, but no job prospects. “You look at everybody's parents and neighbors, and they're getting laid off and don't have jobs,” said Stewart. “Then you look at the young people just coming into the workforce.., it's just scary.”

    When those graduates entered college, the future never looked brighter. But in the four years they've been here, the world outside has changed dramatically. “Those were the exciting times, lots of dot-com opportunities, exploding offers, students getting top dollar with lots of benefits,” said Cheryl Allmen-Vinnidge, of the San Jose State Career Centre. “Times have changed. It's a new market. The job situation is grim (严峻的) now.” Cheryl Allmen-Vinnidge ought to know. She runs the San Jose State Career Centre, (it is) sort of a crossroads between college and the real world. Allmen-Vinnidge says students who do find jobs after college have done their homework. “The typical graduate who does have a job offer started working on it two years ago. They've postured themselves well during the summer. They've had several internships (实习) ,” she said. And they've majored in one of the few fields that are still hot—like chemical engineering, accounting or nursing—where average starting salaries have actually increased over last year. Other popular fields (like information systems management, computer science, and political science) have seen big declines in starting salaries.

    Ryan Stewart (he had hoped to become a teacher) may just end up going back to school. “I'd like to teach college some day and that requires more schooling, which would be great in a bad economy,” he said.

    It is true more students are able to receive college education. It is also true that they will have to face fiercer competition in the job market as they graduate. It becomes harder and harder for the current graduates to get a foothold in job markets, but many of them have no choice but to follow the beaten track. To some students a degree may not be ticket to instant wealth. For now, they can only hope its value will increase over time.

Bicycle Safety

    Operation Always ride your bike in a safe, controlled manner on campus(校园). Obey rules and regulations. Watch out for walkers and other bicyclists, and always use your lights in dark conditions.

Theft Prevention Always securely lock your bicycle to a bicycle rack—even if you are only away for a minute. Register your bike with the University Department of Public Safety. It's fast, easy, and free. Registration permanently records your serial number, which is useful in the possible recovery of the bike stolen.

Equipment

    Brakes  Make sure that they are in good working order and adjusted properly.

    Helmet  A necessity, make sure your helmet meets current safety standards and fit properly.

Lights Always have a front headlight—visible at least 500 feet in front of the bike. A taillight is a good idea.

Rules of the Road

    Riding on Campus  As a bicycle rider, you have a responsibility to ride only on streets and posted bicycle paths. Riding on sidewalks or other walkways can lead to a fine. The speed limit for bicycles on campus is 15mph, unless otherwise posted. Always give the right of ways to walkers. If you are involved in an accident, you are required to offer appropriate aid, call the Department of Public Safety and remain at the scene until the officer lets you go.

    Bicycle Parking  Only park in areas reserved for bikes. Trees, handrails, hallways, and sign posts are not for bicycle parking, and parking in such posts can result in a fine.

If Things Go Wrong

    If you break the rules, you will be fined. Besides violating rules while riding bicycles on campus, you could be fined for:

No bicycle registration—————————————————$25

Bicycle parking banned————————————————--$30

Blocking path with bicycle ———————————————$40

Violation of bicycle equipment requirement ————————-$35

    If a stranger offered you money to keep a suitcase in your spare room，would you accept? How about the other way round：if you had too many belongings，would you consider trusting someone you met online with their safekeeping? Anthony Paine believed enough of us would answer “yes” to these questions to launch his own startup(新兴公司)，Stashbee．His business links people with space to those who need it．

    And it's just one player in the booming “sharing economy”，an industry that relies on people renting out things like their beds，bikes and even parking spaces．Airbnb，a company valued at 200bn RMB，provides a platform for those renting property short-term．DogVacay pairs holidaymaking pet owners with pet-friendly hosts，and aims to be profitable by 2017．

    All their business models revolve around one simple word：trust．So，how does Stashbee measure up? BBC journalist Dougal Shaw decided to try it out for himself．He had some odds and ends to store while renovating his house，and met a host through the site who could keep them for 475 RMB for two months．All relatively smooth and painless．

    Heavyweights(行业巨头)in the traditional storage industry，such as Big Yenow and Access，aren't convinced．A representative from Access told Shaw he was skeptical about storing with “amateurs”．He considered 24／7(全天候) access to the items and better security as the main advantages of his service.

    Stashbee agree that dealing with security concerns is important，but say business success depends more on people overcoming a distrust of strangers we've been taught since childhood. They aren't alone．Companies such as Costockage，Roost and Spacer all run similar storage businesses，and are all relying on a shift in consumer attitudes．

    And the concept of social storage doesn't stop there．CityStasher believe there's a gap in the market for those who want to store things for extremely short periods of time．

    Would you try it out? It's a question of trust．

    Life gets noisier every day and very few people can free from noise of some sort or another.It doesn't matter where you live—in the middle of modern city，or a faraway village—the chances that you will be disturbed by jet aeroplanes，transistor radios，oilpowered engines，etc.，are almost everywhere. We seem to be getting used to noise，too. Some people feel quite lonely without background music while they are working.

    Scientific tests have shown that total silence can be a very frightening experience for human beings. However，some people enjoy listening to pop music which is very loud，and this can do harm to their eardrums (耳鼓)．The noise level in some disco is far above the usual safety level for heavy industrial areas.

    One recent report about noise and concentration suggested that although a lot of people say that any noise disturbs their concentration，what really affects their ability to concentrate is a change in the level of noise. It goes on to say that a background noise，which doesn't change too much (music，for example) may even help people to concentrate.

    People love cellphones, which is why nine in ten Americans own one. But does heavy use of cellphones pose a risk of cancer? This question has caused controversy for many years. A new study in rats now augments those concerns. Its data linked long-term, intense exposure to radiation from cellphones with an increased risk of cancer in the heart or brain. The results have yet to be confirmed, the authors note.

    Indeed, although the rat study found a link between cellphone radiation and cancer, it offers no clues to why such a link might exist, notes Jonathan Samet. He teaches preventative medicine and directs the Institute for Global Health at the University of Southern California in Los Angeles. Still, he calls the new study's findings “significant”.They could lead to studies researching how cellphone radiation might cause cancer, he says.

    Phone signals are relayed between cell towers and cellphones via radio waves. This radio frequency—or RF—radiation is a type known as non-ionizing (非电离的).Unlike X-rays, non-ionizing radiation does not deposit enough energy into cells to release electrons from atoms or molecules, producing ions. So it tends to be far less harmful than ionizing radiation, such as X-rays. But that does not mean radio waves might not cause harm.

    In very large doses (量) this radiation will heat the body and cause tissue damage. But it's not yet known what much lower RF levels might do, such as those from cellphone use. Five years ago, the World Health Organization's International Agency for Research on Cancer, or IARC, concluded that cellphone use “is possibly carcinogenic (致癌的)”.

    Its conclusion was based on what little research data was available at that time. But notice that IARC was not certain. It said only that phone use might “possibly” cause cancer. So scientists at the National Toxicology Program, or NTP, investigated further.

    As Artificial Intelligence(AI) becomes increasingly sophisticated(复杂的), there are growing concerns that robots could become a threat. This danger can be avoided, according to computer science Professor Stuart Russell, if we figure out how to turn human values into a programmable code.

    Russell argues that as robots take on more complicated tasks, it's necessary to translate our morals into AI language.

    For example, if a robot does chores around the house, you wouldn't want it to put the pet cat in the oven to make dinner for the hungry children. "You would want that robot preloaded with a good set of values," said Russell.

    Some robots are already programmed with basic human values. For example, mobile robots have been programmed to keep a comfortable distance from humans. Obviously there are cultural differences, but if you were talking to another person and they came up close in your personal space, you wouldn't think that's the kind of thing a properly brought-up person would do.

    It will be possible to create more sophisticated moral machines, if only we can find a way to set out human values as clear rules.

    Robots could also learn values from drawing patterns from large sets of data on human behaviour. They are dangerous only if programmers are careless.

    The biggest concern with robots going against human values is that human beings fail to so sufficient testing and they've produced a system that will break some kind of taboos(禁忌).

    One simple check would be to program a robot to check the correct course of action with a human when presented with an unusual situation.

    If the robot is unsure whether an animal is suitable for the microwave, it has the opportunity to stop, send out beeps(嘟嘟声), and ask for directions from a human. If we humans aren't quite sure about a decision, we go and ask somebody else.

    The most difficult step in programming values will be deciding exactly what we believe in moral, and how to create a set of ethical rules. But if we come up with an answer, robots could be good for humanity.