‘Penemu, Tokoh dan Teknologi’ Archives
The Invention of the Floppy Disk Drive
By Mary Bellis, About.com Guide In 1971, IBM introduced the first “memory disk”, as it was called then, or the “floppy disk” as it is known today. 8-inch Floppy Disk The first floppy was an 8-inch flexible plastic disk coated with magnetic iron [Read More]
The History of Computers
by Mary Bellis “Who invented the computer?” is not a question with a simple answer. The real answer is that many inventors contributed to the history of computers and that a computer is a complex piece of machinery made up of many parts, each of which can be [Read More]
Awas Lho… Lampu Natal Bisa Ganggu Sinyal WiFi
Kompas – Jumat, 25 Desember JAKARTA, KOMPAS.com – Meriah perayaan Natal dan Tahun Baru seringkali harus dibayar dengan terganggunya sambungan telekomunikasi. Kalau di Indonesia beberapa kali yang paling banyak dilaporkan mungkin gangguan sambungan telepon atau [Read More]
Lighting and Lamps (2 end)
By Mary Bellis, About.com Guide Electric Arc Lamps Sir Humphrey Davy of England invented the first electric carbon arc lamp in 1801. How Arc Lamps Work A carbon arc lamp works by hooking two carbon rods to a source of electricity. With the other ends of the rods spaced at [Read More]
Lighting and Lamps (1)
By Mary Bellis, About.com Guide The first lamp was invented around 70,000 BC. A hollow rock, shell or other natural found object was filled with moss or a similar material that was soaked with animal fat and ignited. Humans began imitating the natural shapes with manmade [Read More]
Adhesives and Glue
By Mary Bellis, About.com Guide Archeologists excavating burial sites from 4000 BC have discovered clay pots repaired with glue made from tree sap. We know that the ancient Greeks developed adhesives for use in carpentry, and created recipes for glue that included the [Read More]
History of Aspirin
By Mary Bellis Aspirin or acetylsalicylic acid, is a derivative of salicylic acid that is a mild, nonnarcotic analgesic useful in the relief of headache and muscle and joint aches. The drug works by inhibiting the production of prostaglandins, body chemicals that are [Read More]
Charles Martin Hall (1863-1914) – Aluminum
By Mary Bellis According to Jefferson Lab, “Scientists suspected than an unknown metal existed in alum as early as 1787, but they did not have a way to extract it until 1825. Hans Christian Oersted, a Danish chemist, was the first to produce tiny amounts of aluminum. [Read More]
Siapa Al-Khwarizmi?
Tokoh yang bernama lengkap Abu Ja'far Muhammad bin Musa Al-Khwarizmi (780-846 M) ini merupakan intelektual muslim yang banyak menyumbangkan karyanya di bidang matematika, geografi, musik, dan sejarah. Dari namanyalah istilah algoritma diambil. Lahir di Khwarizmi, [Read More]
Jet Engines – Hans von Ohain and Sir Frank Whittle
By Mary Bellis Dr. Hans von Ohain and Sir Frank Whittle are both recognized as being the co-inventors of the jet engine. Each worked separately and knew nothing of the other’s work. Hans von Ohain is considered the designer of the first operational turbojet engine. [Read More]
