Security—for the information on your smart phone, as well as for the phone itself—is a hot topic these days.The truth is that you're packing a lot of sensitive information on your phone, and you should keep it safe.

    When it comes to physical security, iPhone users would do well to download Find My iPhone, a free app from Apple that allows you to visit a website and see your (lost, stolen or misplaced) phone on the map.You can then sound an alarm, send a message that will pop up on its screen, lock the phone or erase all your data.

    Android does not have an exact equivalent(等价物), but there are plenty of alternatives. A free app called Lookout offers the find­my­phone feature.The paid version allows you to wipe the data from your phone remotely.

    Then there is your coffee shop's Wi­Fi network.Anyone with minimal technical expert skill can snoop on(窥视) people using shared wireless networks, harvesting passwords and other personal data. Lookout will caution you when you've logged on to an insecure network, but cannot protect you once you're there.

    In order to protect yourself on such networks, you can use a virtual private network, or VPN. This turns all your activity into nonsense to anyone trying to read along with you from across Starbucks. It also keeps websites from tracking you and, if you're travelling, allows you to get access to sites that may be blocked in other countries.

    If you have an iPhone, the simplest VPN app is probably Hotspot Shield, whose distinguishing feature is said to be that it automatically kicks in each time you start browsing (浏览), as opposed to other VPN apps that require you to start them up manually(手动地)．This matters, because even if you decide you want a VPN app, you want to spend approximately zero time thinking about it. For the most part, that was true of Hotspot Shield, though occasionally it took a while to connect or temporarily lost connection without warning. I found myself having to turn the app on and off sometimes, which involved setting my phone constantly.

    If even reading about the settings on your phone drive you crazy, then it is probably best to stay away from a VPN app. But if you're the type who can't resist checking your bank balance from your corner bar, the hassle(麻烦) may be preferable to the risk.

    I grew up with a fat dad 450 pounds at his heaviest. Every week he would try a new diet, and my family ended up eating whatever strange food he was trying at that moment.

    After my third-grade year, my dad landed a life-changing job in Manhattan. My mom, my little sister and I had to move away from our hometown, Chicago, and leave my grandmother and her beautiful food behind.

    Leaving my grandmother was far more frightening than the move to New York City.  There would be no more special weekends at my grandmother's house, the only place I can remember feeling happy, safe and nourished (有营养的). It was what I desired. In this new city, I felt extremely alone and lost, and I missed my grandmother terribly.

    My grandmother knew just how I felt. And she knew the cure. Every week, she would send me a card with a$ 20 bill, a recipe and a list of what to buy at the market. It kept us bonded, and her recipes filled my body and soul.

    Over the years, I have grown to better understand my father's struggles with weight and the toll (代价) it took on him and those who love him. I have come to realize he was driven not by vanity (自负) or selfishness as much as by a deep pain, I  And in spite of growing up in such an unhealthy eating environment ( or perhaps be-cause of it), as an adult I found a passion and a career as a nutrition consultant.

    Today, my father weighs 220 pounds and is a vegan(素食者). How he got there is a story I hope to share in the coming weeks. More importantly, food is no longer a barrier that keeps us apart, but a bridge that keeps us connected. There is nothing my dad enjoys more than talking with me about dietary theories and his weightloss victories. And now I am the one regularly sending recipe cards to my father s house, just as my grandmother did for me.

                                                              Student Sports

    Are you tired of spending all your free time studying, going online, or playing video games? If the only muscles (肌肉) you use are for typing on a keyboard or moving a mouse, then it's time to visit the Student Recreation Center!

    Our Student Sports program runs both competitive leagues (联赛) for serious players and “just-for-fun” leagues for everybody else in a variety of team and individual (个人的) sports. In the competitive league, each team will compete three times per week for a 10-week period. The team with the most victories will win a prize at the end of the tenth week. In “just-for-fun” leagues, teams play only on weekends, and there are no prizes given. Both types of leagues offer volleyball, soccer, softball, tennis, golf, basketball, and more than a dozen other sports. It's a great chance to go out with your friends, make new friends, and get some exercise at the same time.

    The spring season is coming soon, and it's easy to get started. Stop by the Student Sports desk in the Student Recreation Center or go online to www.studnetrec.OurUniv.edu/studentsports. Whether you come down to visit the center or register (登记) online, you will have to fill out a simple form. On this form you will be asked for your name, phone number, email address, your ability level (beginner, middle, or advanced), and the times you are free to play.

    So why don't you pick up your phone and send one more text: Tell your friends that the last day to sign up for the spring season is March 1! But don't wait until the last minute — if you sign up for early registration before February 21, you'll get free tickets to our famous Beach Volleyball Picnic coming up on March 15!

    Here at the Student Recreation Center, we truly believe that getting fit is fun. We hope you'll be joining us for another great season of Student Sports!

    In the early decades of the United States, the agrarian(土地的) movement promoted the farmer as society's hero. In the minds of agrarian thinkers and writers, the farmer was a person on whose well-being the health of the new country depended. The period between the Revolution, which ended in 1783, and the Civil War, which ended in 1865, was the age of the farmer in the United States. Agrarian philosophers, represented most eloquently by Thomas Jefferson, celebrated farmers extravagantly for their supposed centrality in a good society, their political virtue, and their Superior morality. And virtually all policy makers, whether they subscribed to the tenets of the philosophy held by Jefferson or not, recognized agriculture as the key component of the American economy. Consequently, government at all levels worked to encourage farmers as a social group and agriculture as economic enterprise.

    Both the national and state governments developed transportation infrastructure, building canals, roads, bridges, and railroads, deepening harbors, and removing obstructions from navigable streams. The national government imported plant and animal varieties and launched exploring expeditions into prospective farmlands in the West. In addition, government trade policies facilitated the exporting of agricultural products.

    For their part, farmers seemed to meet the social expectations agrarian philosophers had for them, as their broader horizons and greater self-respect, both products of the Revolution, were reflected to some degree in their behavior. Farmers seemed to become more scientific, joining agricultural societies and reading the farm newspapers that sprang up throughout the country. They began using improved implements, tried new crops and pure animal breeds, and became more receptive to modern theories of soil improvement.

    They also responded to inducements by national and state governments. Farmers streamed to the West, filling frontier lands with stunning rapidity. But farmers responded less to the expectations of agrarians and government inducements than to growing market opportunities. European demand for food from the United States seemed insatiable. War, industrialization, and urbanization all kept demand high in Europe. United States cities and industries grew as well; even industries not directly related to farming thrived because of the market, money, and labor that agriculture provided.

    When an ice cube melts, it creates a puddle (水坑). When an ice sheet (冰盖)melts, it raises sea levels. It sounds simple, but scientists have debated for decades whether both the Antarctic and Greenland ice sheets actually were shrinking, and how much that melting contributed to rising sea levels.

    Now, a new study has provided the best evidence of how the polar ice sheets are responding to our warming world. In the study, an international team of scientists looked at 20 years of' data in the ice sheets collected by 10 satellite missions. The team's conclusion: The Greenland and Antarctic ice sheets both are losing ice overall. The researchers also found that between 1992 and 2011, melt water from those shrinking ice sheets caused sea levels to rise by about 11 millimeters.

    Over the 19 years studied, the Greenland ice sheet lost 2.7 trillion metric tons of ice. The Antarctic ice sheet also shrank by about 1.3 trillion metric tons. Previously, some scientists disagreed whether the Antarctic sheet, the largest mass of ice in the world, was shrinking or growing or neither.

    While the Earth is warming overall, the effect of climate change varies from region to region. Over the last 15 years, for example, scientists have something disagreed over how climate change has affected the polar ice sheets. Many studies found that the sheets lost a lot of ice and that not enough snow fell on the sheets to compensate for the loss. But other studies found that the loss of ice was balanced by the gain in snowfall.

    Richard Alley, a glacier scientist at Penn State University, said that many of those studies looked at different areas, and over different time periods. In addition, the studies didn't all use the satellite data in the same way. Those differences made, it difficult to compare the results.

    The data in the new study matched time periods and areas. The study also combined measurements from kinds of satellites.

Over the years, electronic commerce or e-commerce has grown rapidly. The rise of e-commerce large enterprises such as Amazon and Alibaba in the mid-90s changed the face of the retail (零售) industry. E-commerce may be thought of as an open, global marketplace or a digital version of mail-order catalogue (目录). Nearly every imaginable product and service is available through e-commerce dealings these days.

Many young entrepreneurs have dived into the e-commerce world, ambitious and hoping to succeed. Some, like Mitchell Zvagelskiy. Zvagelskiy is the co-founder of Scale Online, a fast-growing startup in California and runs several e-commerce stores. Zvagelskiy and his business partner began opening online stores and building a team to grow them, allowing the stores to earn as much as $100.000＋ in monthly revenue. Zvagelskiy owes his success to teamwork and his willingness to seize opportunity.

"Being able to do this all by the age of 20 is something I didn't expect and would not be able to do if I constantly listened to other people and just went the typical college then job route," he said. "Life can change fast if you change fast."

Thanks to the rapid success of his YouTube channel, Mitchell has been able to not only make great profit from his companies, but help others in starting and growing their own e-commerce stores too. "My meaning of success arises from my relationships with other people," he said. "By focusing on building strong relationships with others, I'm able to partner up and work with like-minded individuals in finding market opportunities and solving whatever problems people are facing."