Welcome back - here's today's featured article:
by: Ismael D. Tabije
One of the most useful attachments of a computer is a scanner which has now become indispensable for both home and office usage. Scanners analyze an image and text and process them in such a way that the optical characters can be saved in a file on your computer. These images and text can be altered as per the need and then printed or used on your web page.
Among all the various types of scanners available, Flatbed scanners (also called desktop scanners) are the most versatile and common. The other types are sheet-fed scanners and hand-held scanners. Whereas the sheet-fed scanners are like the flatbed scanners except that the document is moved while keeping the scan head stationary, hand-held scanners need to be moved by the user in place of a motorized bed. Hand-held scanners do not give good image quality but they can capture the text very quickly. Finally, there is another type of scanner called a Drum scanner that is used to capture extremely detailed images and is normally used by the publishing industry.
The following steps describe how a scanner works:
• The glass plate is used to place the document and the cover is closed. The cover gives a uniform background, which is used by the software of the scanner to fix a reference point in relation to the size of the document that is being scanned. The inside of the cover is mostly flat white although some of them are black too.
• In order to illuminate the document, new scanners use a cold cathode fluorescent lamp (CCFL) or a xenon lamp whereas older scanners use a standard fluorescent lamp.
• The scan head is made up of mirrors, lens, filters and CCD array. A stepper motor runs a belt that moves the scan head slowly over the document. A stabilizer bar is attached to the scan head to eliminate wobble or deviation in the pass, which is the term to indicate that a complete scan of the document has been completed, by the scan head.
• An angled mirror is used to reflect the image of the document to another mirror. Whereas some scanners use two mirrors there are others that use three mirrors. In order to focus the image onto a smaller surface, the mirrors are slightly curved.
• The last mirror reflects the image onto a lens, which focuses the image through a filter on the CCD array.
Each type of scanner has its own filter and lens arrangement. In some scanners there is a three-pass scanning process with each pass using a different color filter (red, green or blue) between the lens and CCD array. After the completion of the three passes, the three filtered images are assembled by the scanner software into a single full-color image. However, the single pass process is used by most scanners nowadays whereby the image is split into three smaller versions of the original by the lens. These smaller versions are then passed through a color filter (red, green or blue) onto a discrete area of the CCD array. The data from the three areas of the CCD array is combined by the scanner into a single full-color image.
A newer imaging array technology is contact image sensor (CIS), which has become very popular nowadays. It replaces the CCD array, mirrors, filters, lamp and lens with rows of red, green and blue light emitting diodes (LEDs). However, the CIS scanners are not capable of providing the same degree of quality and resolution as is given by the CCD scanners although the CIS scanners are cheaper, lighter and thinner.
About The Author
The writer, Ismael D. Tabije, runs the website, http://www.bestlaptopnotebookdeal.com, where you can get tips for buying top laptop brands at cheap prices from reliable online merchants.
idtbusiness@yahoo.com
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Monday, January 21, 2008
Public Relations And The Internet
by: Bernice Ly
Although the field of public relations is quite new, it is seen to be pivotal to many companies when coordinating advertising and marketing campaigns. Public relations, which is often defined as “The art or science of establishing and promoting a favorable relationship with the public” (Answers.com 2006, p: 1) has been increasing in popularity, especially now with the Internet being used as a tool for communication in modern society.
Frequent usage of the Internet has allowed consumers to communicate and access products and services from companies more easily. For example, Jerry Fireman states, “Public relations can be cost effective because the media—rather than the marketer—takes on the expense of delivering the information to the intended recipient.” (Fireman 2006, p: 1). Hence, by advertising on the Internet and promoting good relationships with clients, public relation officers are now able to achieve access to a wider market with a lower expenditure rate. Furthermore, the Internet has viewers from different nations and cultural beliefs; therefore, the scope of campaigns for modern public relation officers has increased.
Secondly, the technology of the Internet has increased the attractiveness and effectiveness of public relations. For example, public relations originated from Newspapers and News reports; however, communication can now take the form of interactive visual graphics as well as creative websites and short multimedia presentations. Techniques that are used by public relation consultants are varied, hence creativity and the impact of the statement on the website is very important in modern communication and public relations. Public relations in contemporary society is now inter-connected with understanding the discourse and the changes of supply and demand in the market, however, it is also about effective corporate ethics used to enhance the status of a company, and to provide effective long-term relationships with clients.
Although some academics would argue that public relations have become advertisement-based focusing mainly on persuading consumers to purchase a product, the effectiveness of these advertising and marketing techniques have also greatly enhanced the needs of the consumer market. The advantages of utilizing public relations on the Internet have also benefited people who may not have otherwise have had access to the advertising of these products due to their lifestyle or the location of their home. The Internet has indeed connected the wants and demands of consumers to the supply and services of the producers. Although the value and importance of the Internet is highly contentious and can be interpreted differently by separate discourses, most societies would agree that the Internet has established a prominent role in the globalization process, resulting in public relations and communication increases.
References:
Answers.com (2006) Definition of Public Relations: http://www.answers.com/
Fireman, Jerry (2006) Successful PR: ‘It’s all about understanding the media.’ http://www.marketingprofs.com/login/signup.asp?source=/5/fireman7.asp
About The Author
Bernice Ly
http://www.m6.net
Bernice Ly is an academic writer working at M6.Net: ‘The web-hosting company for humans.’ M6.Net is working hard to help humanity experience the power and freedom to develop their own part of the Internet, to share their information and connect with anyone, anywhere, anytime.
**Get a money-making mall FREE! Click here:
http://www.mypowermall.com/Biz/Home/30831
Although the field of public relations is quite new, it is seen to be pivotal to many companies when coordinating advertising and marketing campaigns. Public relations, which is often defined as “The art or science of establishing and promoting a favorable relationship with the public” (Answers.com 2006, p: 1) has been increasing in popularity, especially now with the Internet being used as a tool for communication in modern society.
Frequent usage of the Internet has allowed consumers to communicate and access products and services from companies more easily. For example, Jerry Fireman states, “Public relations can be cost effective because the media—rather than the marketer—takes on the expense of delivering the information to the intended recipient.” (Fireman 2006, p: 1). Hence, by advertising on the Internet and promoting good relationships with clients, public relation officers are now able to achieve access to a wider market with a lower expenditure rate. Furthermore, the Internet has viewers from different nations and cultural beliefs; therefore, the scope of campaigns for modern public relation officers has increased.
Secondly, the technology of the Internet has increased the attractiveness and effectiveness of public relations. For example, public relations originated from Newspapers and News reports; however, communication can now take the form of interactive visual graphics as well as creative websites and short multimedia presentations. Techniques that are used by public relation consultants are varied, hence creativity and the impact of the statement on the website is very important in modern communication and public relations. Public relations in contemporary society is now inter-connected with understanding the discourse and the changes of supply and demand in the market, however, it is also about effective corporate ethics used to enhance the status of a company, and to provide effective long-term relationships with clients.
Although some academics would argue that public relations have become advertisement-based focusing mainly on persuading consumers to purchase a product, the effectiveness of these advertising and marketing techniques have also greatly enhanced the needs of the consumer market. The advantages of utilizing public relations on the Internet have also benefited people who may not have otherwise have had access to the advertising of these products due to their lifestyle or the location of their home. The Internet has indeed connected the wants and demands of consumers to the supply and services of the producers. Although the value and importance of the Internet is highly contentious and can be interpreted differently by separate discourses, most societies would agree that the Internet has established a prominent role in the globalization process, resulting in public relations and communication increases.
References:
Answers.com (2006) Definition of Public Relations: http://www.answers.com/
Fireman, Jerry (2006) Successful PR: ‘It’s all about understanding the media.’ http://www.marketingprofs.com/login/signup.asp?source=/5/fireman7.asp
About The Author
Bernice Ly
http://www.m6.net
Bernice Ly is an academic writer working at M6.Net: ‘The web-hosting company for humans.’ M6.Net is working hard to help humanity experience the power and freedom to develop their own part of the Internet, to share their information and connect with anyone, anywhere, anytime.
**Get a money-making mall FREE! Click here:
http://www.mypowermall.com/Biz/Home/30831
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