[29,Oct,2016] Saturday meeting topic

1. Dietary supplements could be bad for you Millions of people take dietary supplements in the belief that they boost health. New research casts doubt on these pills and tablets. The American organisation Consumer Reports (CR) found serious health risks from vitamins, probiotics, and weight loss pills. CR said the biggest problem is that supplements are largely unregulated. Medicinal drugs have to be tested for safety and effectiveness, but supplements need much less government approval. This means consumers are in the dark regarding the ingredients of the supplements and how the body reacts to them.   Lisa Gill from CR said the report showed the dangers of supplements. She said they could cause liver and kidney failure, kidney transplants, and heart problems. Gill added: "Just because it's not prescription, you say, 'oh, it's safe,' but that's not necessarily true." She urged people to avoid 15 ingredients in supplements, including red yeast and caffeine powder. She warned: "There have been deaths associated with each of these." She told people to see a doctor or pharmacist before taking supplements. She said: "Treat it like a medication….It's really about your health." Questions: 1. Do you take dietary supplements? Why or why not? 2. Do you think it is better to take cold medicine or have your body fight it off without medicine? 3. What efforts do you make for your health?     2. Talk nerdy to me <a href="http://www.ted.com/talks/melissa_marshall_talk_nerdy_to_me/transcript?language=en">http://www.ted.com/talks/melissa_marshall_talk_nerdy_to_me/transcript?language=en</a> Five years ago, I experienced a bit of what it must have been like to be Alice in Wonderland. Penn State asked me, a communications teacher, to teach a communications class for engineering students. And I was scared. (Laughter) Really scared. Scared of these students with their big brains and their big books and their big, unfamiliar words. But as these conversations unfolded, I experienced what Alice must have when she went down that rabbit hole and saw that door to a whole new world. That's just how I felt as I had those conversations with the students. I was amazed at the ideas that they had, and I wanted others to experience this wonderland as well. And I believe the key to opening that door is great communication.   We desperately need great communication from our scientists and engineers in order to change the world. Our scientists and engineers are the ones that are tackling our grandest challenges, from energy to environment to health care, among others, and if we don't know about it and understand it, then the work isn't done, and I believe it's our responsibility as non-scientists to have these interactions. But these great conversations can't occur if our scientists and engineers don't invite us in to see their wonderland. So scientists and engineers, please, talk nerdy to us.   I want to share a few keys on how you can do that to make sure that we can see that your science is sexy and that your engineering is engaging. First question to answer for us: so what? Tell us why your science is relevant to us. Don't just tell me that you study trabeculae, but tell me that you study trabeculae, which is the mesh-like structure of our bones because it's important to understanding and treating osteoporosis.   And when you're describing your science, beware of jargon. Jargon is a barrier to our understanding of your ideas. Sure, you can say "spatial and temporal," but why not just say "space and time," which is so much more accessible to us? And making your ideas accessible is not the same as dumbing it down. Instead, as Einstein said, make everything as simple as possible, but no simpler. You can clearly communicate your science without compromising the ideas. A few things to consider are having examples, stories and analogies. Those are ways to engage and excite us about your content. And when presenting your work, drop the bullet points. Have you ever wondered why they're called bullet points? (Laughter) What do bullets do? Bullets kill, and they will kill your presentation. A slide like this is not only boring, but it relies too much on the language area of our brain, and causes us to become overwhelmed. Instead, this example slide by Genevieve Brown is much more effective. It's showing that the special structure of trabeculae are so strong that they actually inspired the unique design of the Eiffel Tower. And the trick here is to use a single, readable sentence that the audience can key into if they get a bit lost, and then provide visuals which appeal to our other senses and create a deeper sense of understanding of what's being described.   So I think these are just a few keys that can help the rest of us to open that door and see the wonderland that is science and engineering. And because the engineers that I've worked with have taught me to become really in touch with my inner nerd, I want to summarize with an equation. (Laughter) Take your science, subtract your bullet points and your jargon, divide by relevance, meaning share what's relevant to the audience, and multiply it by the passion that you have for this incredible work that you're doing, and that is going to equal incredible interactions that are full of understanding. And so, scientists and engineers, when you've solved this equation, by all means, talk nerdy to me. Thank you. Questions: 1. Are you interested in science and technology? Why or why not? 2. What efforts should be made for scientists to better communicate with the public? 3. What are some qualities of a good communicator? Do you think you are a good communicator? Why or why not? 4. Why do Korean youth avoid the study of pure sciences in college? What should be done to encourage students to study pure sciences?   3. History of Halloween <a href="http://www.history.com/topics/halloween/history-of-halloween">http://www.history.com/topics/halloween/history-of-halloween</a> Straddling the line between fall and winter, plenty and paucity, life and death, Halloween is a time of celebration and superstition. It is thought to have originated with the ancient Celtic festival of Samhain, when people would light bonfires and wear costumes to ward off roaming ghosts. In the eighth century, Pope Gregory III designated November 1 as a time to honor all saints and martyrs; the holiday, All Saints’ Day, incorporated some of the traditions of Samhain. The evening before was known as All Hallows’ Eve and later Halloween. Over time, Halloween evolved into a secular, community-based event characterized by child-friendly activities such as trick-or-treating. In a number of countries around the world, as the days grow shorter and the nights get colder, people continue to usher in the winter season with gatherings, costumes and sweet treats.   Ancient Origins of Halloween   Halloween’s origins date back to the ancient Celtic festival of Samhain (pronounced sow-in). The Celts, who lived 2,000 years ago in the area that is now Ireland, the United Kingdom and northern France, celebrated their new year on November 1. This day marked the end of summer and the harvest and the beginning of the dark, cold winter, a time of year that was often associated with human death. Celts believed that on the night before the new year, the boundary between the worlds of the living and the dead became blurred. On the night of October 31 they celebrated Samhain, when it was believed that the ghosts of the dead returned to earth. In addition to causing trouble and damaging crops, Celts thought that the presence of the otherworldly spirits made it easier for the Druids, or Celtic priests, to make predictions about the future. For a people entirely dependent on the volatile natural world, these prophecies were an important source of comfort and direction during the long, dark winter.   To commemorate the event, Druids built huge sacred bonfires, where the people gathered to burn crops and animals as sacrifices to the Celtic deities. During the celebration, the Celts wore costumes, typically consisting of animal heads and skins, and attempted to tell each other’s fortunes. When the celebration was over, they re-lit their hearth fires, which they had extinguished earlier that evening, from the sacred bonfire to help protect them during the coming winter.   By 43 A.D., the Roman Empire had conquered the majority of Celtic territory. In the course of the four hundred years that they ruled the Celtic lands, two festivals of Roman origin were combined with the traditional Celtic celebration of Samhain. The first was Feralia, a day in late October when the Romans traditionally commemorated the passing of the dead. The second was a day to honor Pomona, the Roman goddess of fruit and trees. The symbol of Pomona is the apple and the incorporation of this celebration into Samhain probably explains the tradition of “bobbing” for apples that is practiced today on Halloween.   On May 13, 609 A.D., Pope Boniface IV dedicated the Pantheon in Rome in honor of all Christian martyrs, and the Catholic feast of All Martyrs Day was established in the Western church. Pope Gregory III (731–741) later expanded the festival to include all saints as well as all martyrs, and moved the observance from May 13 to November 1. By the 9th century the influence of Christianity had spread into Celtic lands, where it gradually blended with and supplanted the older Celtic rites. In 1000 A.D., the church would make November 2 All Souls’ Day, a day to honor the dead. It is widely believed today that the church was attempting to replace the Celtic festival of the dead with a related, but church-sanctioned holiday. All Souls Day was celebrated similarly to Samhain, with big bonfires, parades, and dressing up in costumes as saints, angels and devils. The All Saints Day celebration was also called All-hallows or All-hallowmas (from Middle English Alholowmesse meaning All Saints’ Day) and the night before it, the traditional night of Samhain in the Celtic religion, began to be called All-hallows Eve and, eventually, Halloween.   Halloween Comes to America   Celebration of Halloween was extremely limited in colonial New England because of the rigid Protestant belief systems there. Halloween was much more common in Maryland and the southern colonies. As the beliefs and customs of different European ethnic groups as well as the American Indians meshed, a distinctly American version of Halloween began to emerge. The first celebrations included “play parties,” public events held to celebrate the harvest, where neighbors would share stories of the dead, tell each other’s fortunes, dance and sing. Colonial Halloween festivities also featured the telling of ghost stories and mischief-making of all kinds. By the middle of the nineteenth century, annual autumn festivities were common, but Halloween was not yet celebrated everywhere in the country.   In the second half of the nineteenth century, America was flooded with new immigrants. These new immigrants, especially the millions of Irish fleeing Ireland’s potato famine of 1846, helped to popularize the celebration of Halloween nationally. Taking from Irish and English traditions, Americans began to dress up in costumes and go house to house asking for food or money, a practice that eventually became today’s “trick-or-treat” tradition. Young women believed that on Halloween they could divine the name or appearance of their future husband by doing tricks with yarn, apple parings or mirrors.   In the late 1800s, there was a move in America to mold Halloween into a holiday more about community and neighborly get-togethers than about ghosts, pranks and witchcraft. At the turn of the century, Halloween parties for both children and adults became the most common way to celebrate the day. Parties focused on games, foods of the season and festive costumes. Parents were encouraged by newspapers and community leaders to take anything “frightening” or “grotesque” out of Halloween celebrations. Because of these efforts, Halloween lost most of its superstitious and religious overtones by the beginning of the twentieth century.   By the 1920s and 1930s, Halloween had become a secular, but community-centered holiday, with parades and town-wide parties as the featured entertainment. Despite the best efforts of many schools and communities, vandalism began to plague Halloween celebrations in many communities during this time. By the 1950s, town leaders had successfully limited vandalism and Halloween had evolved into a holiday directed mainly at the young. Due to the high numbers of young children during the fifties baby boom, parties moved from town civic centers into the classroom or home, where they could be more easily accommodated. Between 1920 and 1950, the centuries-old practice of trick-or-treating was also revived. Trick-or-treating was a relatively inexpensive way for an entire community to share the Halloween celebration. In theory, families could also prevent tricks being played on them by providing the neighborhood children with small treats. A new American tradition was born, and it has continued to grow. Today, Americans spend an estimated $6 billion annually on Halloween, making it the country’s second largest commercial holiday.   Today’s Halloween Traditions   The American Halloween tradition of “trick-or-treating” probably dates back to the early All Souls’ Day parades in England. During the festivities, poor citizens would beg for food and families would give them pastries called “soul cakes” in return for their promise to pray for the family’s dead relatives. The distribution of soul cakes was encouraged by the church as a way to replace the ancient practice of leaving food and wine for roaming spirits. The practice, which was referred to as “going a-souling” was eventually taken up by children who would visit the houses in their neighborhood and be given ale, food, and money.   The tradition of dressing in costume for Halloween has both European and Celtic roots. Hundreds of years ago, winter was an uncertain and frightening time. Food supplies often ran low and, for the many people afraid of the dark, the short days of winter were full of constant worry. On Halloween, when it was believed that ghosts came back to the earthly world, people thought that they would encounter ghosts if they left their homes. To avoid being recognized by these ghosts, people would wear masks when they left their homes after dark so that the ghosts would mistake them for fellow spirits. On Halloween, to keep ghosts away from their houses, people would place bowls of food outside their homes to appease the ghosts and prevent them from attempting to enter.   Halloween Superstitions   Halloween has always been a holiday filled with mystery, magic and superstition. It began as a Celtic end-of-summer festival during which people felt especially close to deceased relatives and friends. For these friendly spirits, they set places at the dinner table, left treats on doorsteps and along the side of the road and lit candles to help loved ones find their way back to the spirit world. Today’s Halloween ghosts are often depicted as more fearsome and malevolent, and our customs and superstitions are scarier too. We avoid crossing paths with black cats, afraid that they might bring us bad luck. This idea has its roots in the Middle Ages, when many people believed that witches avoided detection by turning themselves into cats. We try not to walk under ladders for the same reason. This superstition may have come from the ancient Egyptians, who believed that triangles were sacred; it also may have something to do with the fact that walking under a leaning ladder tends to be fairly unsafe. And around Halloween, especially, we try to avoid breaking mirrors, stepping on cracks in the road or spilling salt.   But what about the Halloween traditions and beliefs that today’s trick-or-treaters have forgotten all about? Many of these obsolete rituals focused on the future instead of the past and the living instead of the dead. In particular, many had to do with helping young women identify their future husbands and reassuring them that they would someday—with luck, by next Halloween—be married. In 18th-century Ireland, a matchmaking cook might bury a ring in her mashed potatoes on Halloween night, hoping to bring true love to the diner who found it. In Scotland, fortune-tellers recommended that an eligible young woman name a hazelnut for each of her suitors and then toss the nuts into the fireplace. The nut that burned to ashes rather than popping or exploding, the story went, represented the girl’s future husband. (In some versions of this legend, confusingly, the opposite was true: The nut that burned away symbolized a love that would not last.) Another tale had it that if a young woman ate a sugary concoction made out of walnuts, hazelnuts and nutmeg before bed on Halloween night she would dream about her future husband. Young women tossed apple-peels over their shoulders, hoping that the peels would fall on the floor in the shape of their future husbands’ initials; tried to learn about their futures by peering at egg yolks floating in a bowl of water; and stood in front of mirrors in darkened rooms, holding candles and looking over their shoulders for their husbands’ faces. Other rituals were more competitive. At some Halloween parties, the first guest to find a burr on a chestnut-hunt would be the first to marry; at others, the first successful apple-bobber would be the first down the aisle.   Of course, whether we’re asking for romantic advice or trying to avoid seven years of bad luck, each one of these Halloween superstitions relies on the good will of the very same “spirits” whose presence the early Celts felt so keenly. Questions: 1. Do you have any special Halloween memories?2. Do you like festivals? What do you think Koreans celebrate western festivals? 3. Do you like horror stories or movies? Why do thrill seekers love being scared?