Wednesday, June 9, 2010
Thursday, March 4, 2010
Evolution of telecommunication: wire to wireless
In 1793, Claude Chappe invent the first long-distance semaphore (visual or optical) telegraph line. In 1821, Joseph Wheatstone, invented the first microphone. In 1831, Joseph Henry invented the first electric telegraph. In 1835, Samuel Morse invented Morse code. In 1843, Samuel Morse invented the first long distance electric telegraph line. At the same year, Alexander Bain patents the first fax machine. In 1876, Alexander Graham Bell patents the electric telephone. In 1889, Almon Strowger, patents the direct dial telephone or automatic telephone exchange. In 1894, Guglielmo Marconi, improves wireless telegraphy.
In 1898, the first telephone answering machine was invented. This allows automatic phone call answering while receivers were away. In 1902, Guglielmo Marconi transmits radio signals from Cornwall (UK) to Newfoundland (North America). This is the first radio signal sent across the Atlantic Ocean. In 1906, Lee Deforest invents the electronic amplifying tube or triode. This allowed all electronic signals to be amplified improving all electronic communications. For example, telephones and radios. In 1914, the first cross continental telephone call made. In 1916, First radio with tuners was discovered by using different frequency to communicate with different station. In 1925, John Logie Baird, transmits the first experimental television signal. In 1927, NBC start 2 radios networks and the first television broadcast in England. In 1930, US had its first television broadcast.
The future of telecommunication is on the way and changing. The two most visible changes in our telecommunication networks within the foreseeable future will be increase speed and access. With the growth and incresing dependability of wireless network, land lines and the use of copper coaxial cabling will eventually become a thing of the past. Telecommunication industry will soon undergo a shift of wireless and fiber optic technologies which will increase the potential for technology and the services that will be offer by telecommunication company. In addition price will also decrease.Data management- the evolution of data management technology: from traditional file to Warehouse
Data management approach instead of traditional file processing. Traditional method leading to 4 main problems, there are data redundancy, lack of integration, data dependence and lack of standardization.
Evolution of Data management technology (DBMS) technology
In the 1960s, network and hierarchical systems such as CODASYL and IMSTM were the state-of-the -art technology for automated banking, accounting, and order processing systems. Their basic architecture mixed the physical manipulation of data with its logical manipulation
A revolutionary paper by Codd in 1970. Codd's relational model introduced the notion of data independence, which separated the physical representation of data from the logical representation presented to applications. Data could be moved from one part of the disk to another or stored in a different format without causing applications to be rewritten. Application developers were freed from the tedious physical details of data manipulation, and could focus instead on the logical manipulation of data in the context of their specific application.
The foundation of the DBMS platform is a state-of-the art database architecture that seamlessly provides both relational and native XML as first class data models. That database technology provides the strongest foundation for an information integration platform for three significant reasons
First, DBMSs have proven to be hugely successful in managing the information.DBMSs deal quite naturally with the storage, retrieval, transformation, scalability, reliability, and availability challenges associated with robust data management.
Secondly, the database industry has shown that it can adapt quickly to accommodate the diversity of data and access patterns introduced by e-business applications over the past 6 years.
Thirdly, a platform that exploits and enhances the DBMS architecture at all levels is in the best position to provide robust end-to-end information integration.
In the 1970s, the data-processing department was not able to handle huge backlogs of requests for data analysis. Applications data was hidden behind mainframe files and databases, and it was periodically recorded in tapes for specific information manipulation.
Since the 1990s, data warehousing has become the most feasible solution to optimize and manipulate data (DBMS) . The current practice is to gather the data that is needed in an optimized database, regardless of the number of different applications and different platforms that are used to generate the source data.
Links:
techiezone.in/random/what-is-a-data-warehouse
www.dkms.com/papers/archev.pdf
http://www.ibm.com/developerworks/data/library/techarticle/0206roth/0206roth.html#evolution
http://www.information-management.com/news/946-1.html
Thursday, February 25, 2010
IS software-The comparison between general purpose application software and function-specific application software
General purpose application software included spreadsheet, word processing, data base management systems and presentation graphics. These software sometimes comes with a group that known as integrated packages and software suite.
Function-specific application software is mainly using in graphic, audio and video, multimedia, web authoring and artificial intelligence. Some of the software was developed to complete specific task on specific field like education, engineering, science, banking and finance.
General purpose application software and function-specific application software is different because they have different features. General purpose application software have a common features where can be used in most of the discipline and occupation where the function-specific application software can only be used on specific discipline and occupation because of specific features.
Spreadsheet
Media PLayer
Word Processing
General purpose application software is different from function-specific software because it had a different purpose for usage. Function-specific application software seems like more professional and understanding the task they do. A graphical general purpose application software may be satisfy mostly the general user but not the people who working for graphical design or artistic. These group people may require function-specific application software in order to complete their job.
Links :
http://en.wikipedia.org/wiki/Application_software
http://www.pcmag.com/encyclopedia_term/0,2542,t=application+software&i=37931,00.asp
Wednesday, February 24, 2010
IS HardWare- The Evolution of computer system
Minicomputer is a largely obsolete term for a class of multi-user computers which make up the middle range of the computing spectrum which is the high-end network that handle large scale processing of business applications. More modern terms for such machines include midrange systems, workstations and servers.
Links:
Video for evolution of computer system--http://www.youtube.com/watch?v=T-5nS2tVcTA
Articles and journal of evolution of computer system--http://www.springerlink.com/content/m066087r8318t141/
Computer system analysis--http://www.bls.gov/oco/ocos287.htm
Thursday, February 11, 2010
Liew Yong Shiung
Vincent Lee Pei Chuan
