Selasa, 27 September 2016

My Favorite Place

         My favorite place is my bedroom. In my bedroom, there is a bed who pretty big  so sometime I use my bed as a place for studying.  My bed is pretty neat that make me comfortable to doing all my activity in the bed like reading a novel, drawing, studying, sleeping, chatting, playing an online game, and many more except eating.

             In my bedroom there is a table or desk for studying. Sometime this desk isn't neat when it is used to studying. But after being used to study, I usually tidy up the desk to make it look neat. There is a calendar in front of the desk. This calendar usually help me in knowing some of the deadlines and test dates. This calendar has helped me to be more disciplined in time management.


 
           Right at the top of the calendar there is a secret room were quite narrow. I use this room when i have a bad day or a sadness because in this narrow rooms, there are some snacks that make me happy like a chocolate and green tea snacks. I believe that when i eat some snacks in that room, my sadness is become a happiness. Beside that, there are some stuffs that full of memories. The memories that made me motivated to move on and never repeat the same mistakes.

Rabu, 14 September 2016

Megantara 2016

    Megantara is an art, literature, and culture festival in SMAN 3 Bandung. Before Megantara, there were Matswapati in 2014 and Gamarvani in 2015. Megantara was held on September 10, 2016. This festival was located at Lapangan Bali. There were many food stand which was filled with many kinds of traditional Indonesian food like Sate Padang, Pempek, and many more. Before the open gate, there was a parade.

    In this festival, i became one of the performers for the fashion show. The fasion show displays various kinds of authentic clothing from each provinces in Indonesia. Each class should give 3 representative to perform the fashion show. Three representative of my class was Dira, Timo, and me. I got chosen to wear the native clothes from West Sulawesi.Meanwhile Dira wears the native clothes from Yogyakarta and Timo wears the native clothes from Nusa Tenggara Timur.

    We perform our best in fashion show but unfortunately we didn't won. The winner was announced by the mayor of Bandung city Ridwan Kamil and got Rp.1.000.000,00 cash. The winner of this fashion show is Hafizd who wears the native clothes from Papua.
    Altough we didn't won the fashion show competition, at least we participated in this festival. We finished performing fashion show at about 05:45 PM and start changing our clothes. Unfortunately at that time we missed T'sT's performance. Im so dossapointed. My friends who wathed T'sT said it was a blast.After i changed clothes, i watch OSD ITB performance. Suddenly my parents called me to go home.Then my mother picked me up to go home.
    It was an amazing day that give me a lot of memory and experience. Thank you for your attention to read this all and dont forget to come in SMAN 3 Culture Festival in the next year. You will never regret it if you come.

Selasa, 06 September 2016

The Invented Light Bulb


            The most important thing in the past 60 years is discovery of light bulb. The discoverer the light bulb is Thomas Alva Edison. Thomas Alva Edison found the light bulb in 1879. Thomas Alva Edison wasn't the first inventor of the light bulb. An English inventor, Joseph Wilson Swan used carbonized paper filament for his light bulb experiment. The low vacuum level and limited sources of air makes Swan failed in his experiment. Swan retrying experiment with vacuum and better carbon materials. But the lights were found by Swan still not perfect and Swan was not interested in improving the discovery bulbs.
            No long after swan wasn't interested in improving the discovery bulbs, American inventor, Charles Francis Brush developed electric arc lighting system that eventually was adopted throughout the United States and Europe during 1880s. Brush develop dynamo or electrical generator similar to those used that would one day be used to power Edison's electric lamps. His generators were reliable and automatically increased voltage with greater load keeping current constant. His lights were easier to maintain, had automatic functions and burned twice as long as Yablochkov.
            Canadian inventors, Henry Woodward and Matthew Evans filed a patent for an electric lamp with different-sized carbon roods held between electrodes in a glass cylinder filled with nitrogen. Unfortunately they did not successfully commercialize their lights, but eventually sold their patent to Edison in 1879.  Edison then developed its own design of incandescent lamps with high resistance thin filaments of carbon in a high vacuum contained in a sealed glass bulb which has a working period long enough to be commercially practical.
            Quote which describe the working relationship Woodward / Evans on the other incandescent bulbs, including Edison, is from an article in the 1900 issue of Electrical World and Engineer as follows:

"The first incandescent lamp [developed by Woodward and Evans] was constructed at Morrison's brass foundry in Toronto, and was a very crude affair. It consisted of a water gauge glass with a piece of carbon, filed by hand and drilled at each end, for the electrodes, and hermetically sealed at both ends, having a petcock at one end with a brass tube to exhaust the air. Woodward made the mistake of filling the tube or globe of this lamp with nitrogen after having exhausted the air. Prof. Elihu Thomson is quoted as having said that had he stopped when he had the tube exhausted he would have had the honor of being the inventor of the incandescent light as used for commercial purposes... the principle of the incandescent lamp dates several decades before the Woodward experiments, and that King, Chanzy, Farmer and others in the twenty years preceding 1860 made and used incandescent lamps much superior to the very imperfect one upon which Woodward's claims are based. Moreover, the Edison claims, as sustained in the courts, were not on the discovery of the principles of the incandescent lamp but on a definite combination of parts—all well known—which resulted in the production of a practical form of the incandescent lamp."