li cheng's blog at the arctic

WELCOME!please enjoy the wonderful display of northern light!

Monday, July 7, 2008

space travel (accidents)

Human spaceflight has contributed greatly to space knowledge. To ensure the safety of spacecraft crew, scientists around the world have carried out thousands of experiments. However, accidents do occur.........

The Challenger was an American space shuttle orbiter that first launched on April 4, 1983. On the tenth launch, mission STS-51-L, the infamous Challenger explosion occurred. The launch of Challenger was rescheduled several times due to bad weather and other technical difficulties. The day of the launch was the coldest day that NASA had ever launched a shuttle. After some delays, the Challenger was launched for the tenth time. No one knows what happen next will shake the whole world.

A split second into flight, a puff of gray smoke began spurting from right Solid Rocket Booster. Later studies revealed that the dense, black puffs indicated grease, joint insulation, and rubber O-rings in the joint seal were burning up. This resulted in a series of reactions that resulted in the explosion of the spacecraft 72 seconds after launch. The cause of explosion was an O-ring that failed to seal properly, and the cold weather that day contributed to its failure. Seven crew members died in the Challenger explosion.

This terrible accident prompted many scientist to investigate the cause and be able to build a safer spaceship for the future flights.This is why accidents rarely happen these days.......

credits to thinkquest

Monday, June 30, 2008

Do you believe in Reincarnation?

Ever had a vivid dream that you can remember very well? Did you dream of a stranger whom you thought you have known for a very long time? If so, you could be dreaming of your past life. Many superstitious people believe that the dreams that we all have everyday are actually parts of our past memory.

A good example would be the dalai lama, when a dalai lama dies, a new dalai lama is selected by a very special ritual. Laid before a newborn child is some items, among them, items used by the past dalai lama, if the child picks the item that dalai lama used, this child is considered to be the
Reincarnation of dalai lama.

So, do you beleive in Reincarnation?

Sunday, June 29, 2008

My personal reflection about cloning technology (correct my spelling if i am wrong)

Well, to me cloning technology is not really that bad, if we feel lonely we can clone a person just like us to talk to us, and also to share our sadness(since we are the same person i guess...........) with our clone.The advantages to cloning is that we can finally consider the possibility of immortality.Once we die our clone will replace us and we will "live on forever".This will spare us from the pain of losing our loved ones......

However, the is also a bad side to cloning ,who knows whether the clones are harmless or not?Many fear that our clones may murder us and take over our identity( very creepy indeed).Some also fear that our clones may replace the human population in the end.As a human dies, he or she is replaced by a clone which takes over the host's life, this clone may gain access to everything the host owns.

So can we really trust clones?My personal opinion is that the idea of clones is not really safe, why make more of us when there is already enough of us?

My favourite author

The best book i have read so far would be harry potter and the deathly hallows written by J.K Rowling .I am a avid fan of harry potter series and the seventh installment was simply a masterpiece. My reflection after reading her books was that the whole story was written in a highly descriptive manner, the author used used a lot of words to describes a scene, words such as " icy","cold" and "raging" are used.When i am reading this book, i feel as though as if i am in the story itself, the story is so full of suspense , thrill and even a sense of mystery.The best part of the story is the end whereby the shocking truth is finally revealed.If we are all able to learn from the way J.K Rowling writes we will surely attain high scores for our english exams.I will strongly recommend this final book to all my friends.(although it is obvious that i do not need to do so)

Saturday, June 28, 2008

Being an astronomer

Alright, lets get real, you are a famous scientist who just discovered that a huge meteorite is heading towards us and it will collide with earth in exactly two hundred years. A few days later satellite shows the meteorite changing its course and you feel so relieved. That is what it feels like to work in a space observation lab, everyday, you will have a lot of false alarms popping up on the screen. Well its fun right?

Astrology is also one of my interest, in fact, i dare to say that its on top of the my list. Being an astronomer is really exciting as you get to explore the deep space through powerful telescopes, you can also watch the stars and other galaxies, which really sets my mind thinking, are we really alone?

To me, being an astronomer is a perfect job, you get to sit in a well equipped laboratory, you also get to travel to different destinations to observe stars(most destinations are really beautiful), and on top of that,you will be the first few to be informed or discover new planets of even galaxies!

can A.I really behave like a human mind?

Well, all these years, humans had been hoping to create smarter robots to serve mankind , in news throughout the years we can saw the changes in how robots are programmed using A.I technology. some A.I s are so clever that they are used in modern computer games, creating a more challenging and engaging game. However, one question still exists, can we really create a A.I that can truly behave like a human?For days, i had pondered over this question on why the scientist were still unable to find the key to creating the perfect A.I. . The answer is really simple, it is to find out how to be human, many of my friends laughed at my answer, however they were all taken aback when i asked them how to be human.They did not have an answer, neither did the scientist, nor most of the people on earth, i daresay 98% of the human population do not have the answer.

So, what does it take to be a human? How to be human?

The feelings i feel when i gaze at the sky

Every night,i take some time off to gaze at the sky, many people may call me crazy for staring ,but every time i look up, i can see the stars, somehow they always remind me that i am real, still alive. As days passed by, i feel that i am becoming more and more lifeless, attending school every , going to st johns which don't really enjoy, it all really adds up to the stress which is really causing me distress.However, whenever i stare at the sky and the stars, i feel recharged, i feel real and alive. Deep inside me feel that i don't really belong in this world, i really long that one day i will be able to leave earth behind me and set off, seeking my own universe, a place where i really belong.