History of The Calculator

It was only in the 1820s, mechanical calculators became populer.Charles Xavier Thomas de Colmar find a machine that could perform the four basic arithmetic functions. Colmar mechanical calculator, arithometer, presenting a more practical approach in the calculation because the tool can perform addition, subtraction, multiplication, ability, arithometer widely used until World War I. Together with Pascal and Leibniz, Colmar helped build a mechanical computing era.

After almost 12 centuries, emerged another discovery in terms of computing machines. In 1642, Blaise Pascal (1623-1662), who at that time was 18 years old, found what he called a numerical wheel calculator (numerical wheel calculator) to help his father make tax calculations This brass rectangular box called the Pascaline, used eight serrated wheel to add up the numbers to eight digits. This tool is a calculator tool based on ten. Weaknesses of these tools is limited only to do the sums

In 1694, a German mathematician and philosopher, Gottfred Wilhem von Leibniz (1646-1716) improved the Pascaline by creating a machine that can. like its predecessor, this mechanical device works by using the wheels. with study notes and drawings made by Pascal, Leibniz can fine-tune the instrument.

Beginning of the computer that is actually formed by a British mathematics professor, Charles Babbage (1791-1871). In 1812, Babbage noticed natural compatibility between mechanical and mathematical machinery of mechanical machines are very good at doing the same tasks repeatedly without mistake; being mathematics requires a simple repetition of a by steps. The problem than growing up putting engines mechanics as a tool to address the needs of mechanics. Babbage's first attempt to address this problem emerged in 1822 when he proposed a machine equation is called Differential Engine. Using steam, the machine can store programs and can perform calculations and print the results automatically.

After working for ten years Differential Engine, Babbage was suddenly inspired to start making a general-purpose computer first, called the Analytical Engine. Babbage's assistant, Augusta Ada King (1815-1842) has an important role in the manufacture of this machine. He helped revise the plan, seek funding from the British government, and communicate to the public specification of the Analytical Engine. In addition, a good understanding of the Augusta machine makes it possible to put instructions into the machine and also make it the first female programmer. In 1980, the U.S. Defense Department named a programming language ADA with the name as a tribute to him.

History of PT. Indosat

PT. Indosat Tbk was established in 1967 as a foreign investment companies that provide services International Telecommunication Indonesia. PT Indosat Tbk, formerly known as PT Indonesian Satellite Corporation Tbk, which is a provider of telecommunication lines in Indonesia. And telecommunications company Indosat is Indonesia's second largest multimedia to mobile services (Mentari, Matrix, IM3 and StarOne).

In 1980, the Indonesian government to buy all the shares of Indosat, so that when the PT. Indosat, Tbk became Joint Owned Enterprises (SOEs). In 1994 the company went public marked by registering its shares on the Jakarta Stock Exchange (JSX), the Surabaya Stock Exchange (SSX) as well as enroll in the New York Stock Exchange.

PT Palapa Indonesia (Satelindo) was established in 1993 under the supervision of PT Indosat. Began operations in 1994 as a GSM operator. Establishment as a subsidiary of Indosat Satelindo make it as the first GSM operator in Indonesia. In 2001 PT. Indosat, Tbk established PT. Indosat Multi Media Mobile (IM3) and was followed by acquiring all of the shares of PT. Palapa Indonesia (Satelindo) in 2002. Was followed by group as organizer makes Indosat mobile phone operator in Indonesia's second largest

In late 2002, the Indonesian government sold 41.94% stake in Indosat to Singapore Technologies Telemedia Pte. Then widened Indosat Telecommunication Company Limited (PT Indosat, Tbk) and the Foreign Investment into a company that offers a full service, integrated networks, and services of information technology and communications solutions.

On November 20, 2003 signing of the merger agreement merger of Satelindo, Indosat Multi Media Mobile (IM3) and Bima Graha into PT. Indosat, Tbk. This was followed by the emergence of PT. Indosat, Tbk, a company that focuses on the cellular signal (network) strong or Full Network Service Provider (FNSP). By combining the company's mobile, fixed telecommunications and MIDI his services into a single company. PT. Indosat Tbk is positioning itself into a provider of telecommunications services to a broad range of products in Indonesia.

Over the above program, followed by a thorough transformation program that began in 2004. Transformation includes the fields of human resources, technology, culture and values ​​of the company. These efforts are beginning to show encouraging results acquisition, the success of the company's record company revenue exceeded 10 billion Euro and an increase in margins in its 10th year as a public company.

Currently PT. Indosat, Tbk has opened a branch office in 5 regions of Sumatra Regional Office, Regional Office Greater Jakarta and Banten, Bali Nusa & Sulampapua Regional Office, East Java and Kalimantan Regional Office and West & Central Java Regional Office.

History of Photography

Understanding and Definition of Photography

Photography ( from English : photography , which is derived from the Greek word is " Photos " : light and " Grafo " : Painting ) is the process of painting / writing using light media .

Photography means a process or method to produce an image or images of an object by recording the reflection of light on the objects on light sensitive media . The most popular tool for capturing this light is the camera . Without light , there is no photograph that can be made .

To generate proper light intensity to produce an image , use the help of a measuring instrument lightmeter . After obtaining the proper size of the lighting , a photographer can adjust the light intensity by changing the combination of ISO / ASA ( ISO Speed ​​) , diaphragm ( aperture ) and shutter speed ( Speed) . The combination of ISO , Diaphragm & Speed ​​referred to as Exposure ( Exposure ) . In the era of digital photography in which the film is not used , then the speed of the film that was in use evolved into Digital ISO .

history of Photography

History of Photography started in the 19th century . 1839 is the year of the birth of photography . At that time , in France officially declared that photography is a technological breakthrough . At that time , recording two- dimensional as the eye can be made permanent .

History of photography began long before the AD . In the 5th century BCE (BCE ) , a man named Mo Ti observes a phenomenon . If the wall of a dark room there is a small hole ( pinhole ) , then on the inside of the chamber will be reflected in the view of the outside of the room in reverse through the hole . Mo Ti was the first to realize the phenomenon of the camera obscura .

Centuries later , many are aware of and admire this phenomenon , namely Aristotle in the 3rd century BC and an Arab scientist Ibn al Haitam ( Al Hazen ) in the 10th century BC , which seeks to create and develop a tool that is now known as a camera . In 1558 , an Italian scientist , Giambattista della Porta called the " camera obscura " in a box that helps artists capture shadows image .

Name of camera obscura was invented by Johannes Kepler in 1611 . Johannes Kepler makes the camera portable design that is made like a tent , and gave the name of the device camera obscura . Inside the tent was very dark except for a bit of light captured by the lens , the image formed in the state outside of the tent on a piece of paper .

Various studies conducted starting in the early 17th century , the Italian scientist - Angelo Sala use sunlight to record a series of words on a plate of silver chloride . But he failed to maintain a permanent image . Around the year 1800, Thomas Wedgwood , a British experiment to record a positive image of the image in the camera obscura lens , the results are very disappointing . Humphrey Davy conduct further experiments with silver chloride , but also meet the same fate , despite being caught by the camera obscura images without lens .

Finally , in 1824 , a French artist lithography , Joseph - Nicéphore Niepce ( 1765-1833 ) , after eight hours of clicking - exposed view from his bedroom window , through a process called heliogravure ( process works similar lithograph ) on top of a metal plate coated with bitumen , successfully gave birth to a somewhat blurred image , also managed to maintain a permanent image . He continued his experiments until 1826 , is what eventually became the actual early history of photography . The resulting image is now stored at the University of Texas at Austin , USA .

Study after study continues to pata dated dated August 19, 1839 , the opera stage designer who is also a painter , Louis - Jacques Mande ' Daguerre ( 1787-1851 ) was crowned as the first to successfully create photo real : a permanent image on a sheet of copper plate silver coated with a solution of iodine were exposed for one and a half hours of light directly heated mercury ( fluorescent ) . This process is called the daguerreotype . To make the image permanent , washable plates salt solution and distilled asir . January 1839 , Daguerre actually want to patent it . However , the French government thinks that the findings should be shared around the world for free .

Photography then develop very quickly . Eastman Kodak company through , George Eastman developed the photography by creating and selling a roll of film and the camera box is practical , in line with developments in the world of photography through improved lens , shutter , film and photographic paper .

1950, to facilitate shooting on a Single Lens Reflex camera then start to use the prism ( SLR ) , and Japan also began to enter the world of photography with a Nikon camera production was followed by Canon . 1972 Edwin Land Polaroid camera findings began to be marketed . Polaroid camera capable of producing images without going through the process of developing and printing film.

History Copy Machines | Technology

Flood Chester Carlson inventor of a photocopy machine was born on February 8, 1906 in Seattle, Washington, USA father contracted tuberculosis forced him to work hard to get the cost of treatment. By the time 17-year-old mother died, and four years after his mother died following Carlson's father. This does not make Carlson discouraged to learn. He could finish his education up to the college at the California Institute of Technology. after completing his studies, Carlson and then worked at a manufacturer of electronic goods. Chester Carlson began her work as a copyist in a patent document peruahaan patent analysis, Carlson thought to accelerate job is to create a tool that can print documents repeatedly. He also read the various references to the printing press. Finally, he found the concept of electrophotographic, which we now know as a copier.

In 1938, Chester Carlson made a small experiment that utilizes powder soot (carbon) and light exposure and move a post from a medium to another medium. He also uses a concept called photo-conductivity, an electron change when exposed to the light. In essence, with this process, the image can be coupled with process changes the electron. Most of the available literature, the findings of Carlson creates a copy process using electrostatic energy, ie xenography.

Xenography name comes from the Greek, radical Xeros (dry) and graphos (write). Because, in the process does not involve chemicals, unlike previous technology. Through this technique, Chester Carlson has found ways remodel paradigm replicates author a document, which later would be called the photocopying process. This technique is then patented in October 6, 1942. For several years, Chester Carlson trying to perfect his invention. Although very useful, electrophotographic machine is not

interest many people, because the machine is considered to have a promising future. Chester who managed to make a tool that must sell the concept for many years that the copier can be sold on the market. Large companies like Kodak is selling the equipment and the process of shooting, IBM and General Electric, rejected the findings. After almost desperate, Chester got the first Batelle Memorial Institute partners who are willing to capitalize the fund and then with the same effort and managed to persuade Haloid, a medium-sized company Haloid Corporation, New York that sells photo paper would be its partner to develop its findings later changed the name Haloid Company The first electrophotographic copying machines because they lack commercial value, then been proposed name with the name of xerography. Xerography became commercial after adopted by Xerox Corporation.

One of the initial product is a Xerox Xerox 914, the first automatic copier that uses xenography process. Named Xerox 914 to refer to the ability of the machine to copy paper with a size of 9 inches x 14 inches (229 mm x 356 mm). Xerox 914, which can copy up to 100 thousand papers per month, is very popular among people at that time. This product revenues accounted for up to 60 million U.S. dollars. The success made the company decided to change its name from Haloid became Xerox in 1958. Until now the company Xerox is a copier and printer in the world.

The resulting product companies are now headquartered in Stamford, Connecticut, USA in 2006 and recorded a 15.9 billion U.S. dollar revenue. The number of employees reached 53,700 people, spread across the world. Chester Carlson died on 9 September 1968, in Rochester, New York, due to chronic liver disease. Thanks to its findings through a copy machine, Chester Carlson has found ways remodel paradigm replicates a document writer. Until now, this process can hardly be left in modern life. By Chester Carlson's invention also present us with an easy, cheap and quick to duplicate a document.

History Aquarium

On this occasion yusro will share the history and benefits Aquarium. Friend before ever know all about the history of the aquarium or not anyone is interested but has not had time to have it, with a presence in our home aquarium is not only useful as a decoration, but there are other benefits behind it . Derived from the Ocean Aquarium and rium. Ocean derived from English, which means sea or ocean, while the word rium is a fragment of a word that means place an aquarium.

Based on the large Indonesian dictionaries, Aquarium is the place to maintain ornamental fish; Where Aquarium was similar to the one tangk ecosystem contains many components interact with each other so that the whole system running. Originally aquarium use began during the Romans and Egyptians, at the time put the fish in a container which will be aimed as a store of fresh fish supplies.

Selective breeding in China began about 2000 years ago. In the Song Dynasty in China, goldfish kept in the house began in large ceramic vessels (Boediono Mismail "Coral Reef Aquarium" UB Publisher Printing Press I, 2010).

At this time, Aquarium benefit right to decorate the room in which the presence of Aquariums can provide satisfaction and peace of mind as well as decorative home furnishings. Here are some benefits of aquariums in everyday life:

• Inspiring. because the aquarium in order to calm the mind with good people who see it, so that will increase the imagination and passion to create something.
• Optimizing hobby. In general, people keep the fish in a container in the aquarium hobby is because utilizing spare time or after doing the routine, but if in your field this hobby can provide income opportunities sideline.
• Regenerate naturally developed affection on us.
• Clear the mind, where the beauty of the aquarium with fish in it can neutralize the feeling that anything to do with health. Beauty and fish movement often gives away the main attraction capable of hearts and minds at peace.

Well from away to refresh our minds by going to a distant place and sometimes crowded we'd better set aside some money we are to have the aquarium, because then we can refresh our minds anytime without travel far away.

For yusro friends who are interested in having aquarium can find more information about the aquarium and ornamental fish in the market place nearby ornamental fish sales in the area around you, there is guaranteed we will get a lot of information about the aquarium and ornamental fish species. And friends all need to remember that life in the aquarium can provide valuable lessons that we still need a touch of nature to make life more beautiful and meaningful.