Monday, June 30, 2014

LCD Proyector History

LCD projectors are found in New York by Gene Dolgoff. He began bekerjadi in college in 1968 and aims to memproduksisebuah in his video projector that will make a bright LCD yanglebih compared with 3-CRT projectors. The idea was to using an element called a "light valve" to regulate the amount of light that passes through it. This will allow the use of very powerful for an external light source. 

After trying a variety of materials, he occupied the liquid crystal to adjust the light in 1971. He took it to 1984 to get an addressable liquid crystal display (LCD), which is when he built the world's first LCD projector. After the examination, he saw many problems to be corrected including major losses. He then uses a new method for creating high efficiency to eliminate the appearance of the pixels. 

He began working in Projectavision Inc. in 1988, the first time the world of LCD projectors is established. In 1989, he joined as a member of the National Association of Manufacturers photography (NAPM) Standards Subcommittee, IT7-3, diabersama with Leon Shapiro, co-developed the worldwide ANSI standard measurement of brightness, contrast until the resolution of electronic projectors. Originally LCD used with existing systems on the overhead projector. But, the LCD system does not have its own light source. 

With great effort and thousands of failure without discouragement eventually they can be successful and popular to this day. They start with the technology used in some sizes of rear projection television consoles, LCD projection system in large television sets is to allow better image quality as opposed to a 60-inch television, although this time as the main rival of the LCD projector is the LG 100 inch LCD TV. In 2004 and 2005, LCD projection premises has come back a more complete feature for adding dynamic colors perceived contrast has risen to the level of DLP.

Computer History and Development

Early start to say the computer used to visualize the people who have a job to do arithmetic calculations. However, now the computer interpreted to a machine tool.

In the most basic sense, a computer is a device that helps humans to perform various calculations. In this case, the abacus is the first computer that is used to perform basic operations artimatika. 

In the history and development of the computer, or Abacus Abacus is the beginning of the birth of the computer. Computers in conducting the process in electronic form, which allows to perform calculations wider and faster. Until now, the computer can process images, voice, text and non-numerical form other data. To remember all of it can not be separated from the basic numerical calculations. Images, sounds and more simply a abstaksi of crunching numbers inside a machine. In computing these numbers are "1" and "0" representing a combination of active and non-electric active. In other words any images, sounds, text and other computer has the appropriate binary code.

First Generation Computers (1940 - 1950)
First Generation Computers using vacuum tubes several large and complex as crystal diodes, relays, resistors, and capacitors that require electric power of 150 kilowatts. The first electronic computer which used to be common that the ENIAC (Electronic Numerical Integrator And Computer). Already in digital form, but not used as a binary code of the process. Used to solve the complete range of computing problems. Programmed using plugboard and switches, which already supports input and output of the IBM card. 

The first electronic computers were used for non-public, namely ABC (Atanasoff-Berry Computer), ten British Colossus computers, German Z3, LEO, UNIVAC, and the Harvard Mark I.

Second Generation Computers (1955 - 1960)
Second generation computers emerged with the invention of the transistor, which then began replacing vacuum tubes in computer designs. With transistors, power, heat and form much smaller than the first generation computers. However, it is still much greater with computers today. 

Computers with the first transistor was made at the University of Manchester in 1953. Most popular second generation of computer transistors are the IBM 1401. IBM also created the first drive (storage media) in 1956, known as the IBM 350 RAMAC.

Third Generation Computers (1960)
The discovery of Integrated Circuits (IC) or also known as microchips, paving the way for a third generation computer or computers that we are familiar with today. Shaped much smaller with previous generations of computers, with more transistors and microchips embedded into a single. In the development stage, second-generation computers still persist. 

First emergence of minicomputers based on both transistors and microchips such as the IBM System/360. This computer is much smaller and cheaper than previous generations. Third generation computers known as mainframes computer. Minicomputers can be seen as a bridge between the mainframe and microcomputer as proliferation in the development of computers.

Fourth Generation Computers (1971)
Microchips based Central Processing Unit (CPU) The first, consisting of several components microchips for different CPUs. The push for greater integration and miniasturisasi led to the single-chip CPU, the CPU where all the necessary components incorporated into a single microchips called a microprocessor. The first is the Intel 4004 microprocessor.

The advent of the microprocessor spawned the evolution of the microcomputer, a form that would eventually become the personal computer as we know it

Monday, June 23, 2014

Advantages and Disadvantages of Online Learning

Today we recognize the internet as a source of information that is in demand by today's modern society. In the internet we can find a wide range of interesting information about a case in a more complete and easier. For example, when a run into trouble on a difficult question about a lesson that one can easily find the answer over the internet. With facts about the ease and completeness of the information contained in the internet and after seeing the amount of media that can now be used to access the Internet especially also on the rise in the love of the people accessing the internet today and more people are increasingly developing the internet for learning purposes.

Learning activities contained in this internet often we refer with this online learning activity did not escape from a variety of problems that eventually arise with it. The problems associated with benchmarking more about where the advantages and drawbacks of these online learning activities. That with these two below I have summarized about the various advantages and disadvantages are present in online learning activities. Happy reading, I hope you get the information you need here.

The advantages of online learning. The first thing we will discuss here is about excess. In this online learning activity interesting is about time more flexible. A person who wants to learn on the internet does not necessarily have to be based on the specific time that is important because there is internet access they had to learn anytime and anywhere. Range of learning activities is also infinite place, at home anywhere in the world there is internet access, learning can still take place.

Disadvantages of online learning activities. Because of the ease of dissemination of this information by all parties involved then it is very likely the occurrence of errors in the material contained on the internet. Also there are likely many crimes such technologies on the dangers of pornography on the internet there is a stout that had been troubling the parents.

Assesing Computer Based-Learning

Nowadays the world is experiencing with is called globalization. With this raises quite serious impacts felt by the people in the world. The first thing that is felt at this time is to begin the loss of the limits of state which resulted in many people getting easier in terms of communicating around the world. One of the things that led to this globalization is growing rapidly with the emergence of a wide range of communications technologies available today that make a variety of things can be done easily.

We feel a great influence in this era of globalization is about the transfer of technology from abroad into the country. Evident from the many people today are more aggressively using sophisticated gadgets in passing life. Well this would be a positive thing as improving standards of living. Various methods are increasingly carried out by all people to the existence of technology such as the effects of globalization can be perceived more benefits. One of them is lifting technology as one of the very important component in today's modern learning activities.

Comes the computer-based learning as one of the most advanced learning is increasingly perceived by the public. The presence of computer technology can be used as a base from which other sciences. An educator should be able to innovate with think more creatively to the development of computer technology can be used as a growing medium of learning fun.

Basically this computer-based learning demands that every person involved in the learning activities to not only get to learn about the teaching materials alone but more than that they are required to be able to operate a computer. With the ability to operate a computer and thereby obtained mastery of material in this learning activity the learning activities that will happen even more effective because it will set the party that is in it for more than ready da sensitive to each of the possible associated with the development of technology in the world later on eventually.

Thus some of the reviews that I present to you on this computer-based learning, I hope him able to provide many benefits for those of you who need the information.

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