Author Archives: blogger

File Processing Systems

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Even the earliest business computer systems were used to process business records and produce information. They were generally faster and more accurate than equivalent manual systems. These systems stored groups of records in separate files, and so they were called file processing systems. Although file processing systems are a great improvement over manual systems, they do have the following limitations:

Data is separated and isolated.

Data is often duplicated.

Application programs are dependent on file formats.

It is difficult to represent complex objects using file processing systems. Data is separate and isolated. Recall that as the marketing manager you needed to relate sales data to customer data. Somehow you need to extract data from both the CUSTOMER and ORDER files and combine it into a single file for processing. To do this, computer programmers determine which parts of each of the files are needed. Then they determine how the files are related to one another, and finally they coordinate the processing of the files so the correct data is extracted. This data is then used to produce the information. Imagine the problems of extracting data from ten or fifteen files instead of just two! Data is often duplicated. In the record club example, a member’s name, address, and membership number are stored in both files. Although this duplicate data wastes a small amount of file space, that is not the most serious problem with duplicate data. The major problem concerns data integrity.

A collection of data has integrity if the data is logically consistent. This means, in part, that duplicated data items agree with one another. Poor data integrity often develops in file processing systems. If a member were to change his or her name or address, then all files containing that data need to be updated. The danger lies in the risk that all files might not be updated, causing discrepancies between the files. Data integrity problems are serious. If data items differ, inconsistent results will be produced. A report from one application might disagree with a report from another application. At least one of them will be incorrect, but who can tell which one? When this occurs, the credibility of the stored data comes into question. Application programs are dependent on file formats. In file processing systems, the physical formats of files and records are entered in the application programs that process the files. In COBOL, for example, file formats are written in the DATA DIVISION.

The problem with this arrangement is that changes in file formats result in program updates. For example, if the Customer record were modified to expand the ZIP Code field from five to nine digits, all programs that use the Customer record need to be modified, even if they do not use the ZIP Code field. There might be twenty programs that process the CUSTOMER file. A change like this one means that a programmer needs to identify all the affected programs, then modify and retest them. This is both time consuming and error-prone. It is also very frustrating to have to modify programs that do not even use the field whose format changed. It is difficult to represent complex objects using file processing systems. This last weakness of file processing systems may seem a bit theoretical, but it is an important shortcoming.

iPad adopted in teaching activities

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Beginning from the fall semester in 2010, some American universities is going to adopt iPad in teaching activities. Insiders said that it is not only a try to promote educational business with high technology, but may also change the traditional teaching and learning method fundamentally. iPad is a touch-screen tablet PC with 9.7 inch screen and 680 gram. It is easy to be taken. It is one of the e-book that made by iPad company with the function of searching internet, sending and receiving e-mail, reading e-book and playing video or audio, etc.

Since iPad have been appeared on the market, college is also thinking what this small-screen but large-function facility can do for students. It is reported that some universities will adopt iPad in teaching activities. The list includes: American Oklahoma State University, Seton Hall University in Pennsylvania, Reed College, George Fox University, North Carolina State University, etc.

Most of the school which is going to carry out experimental plan will provide a free iPad tablet PC for each student. University of Maryland is also plan to buy a batch of them, put the two-year course of “digital culture and creation” into practice with 60 students to arouse students potential of exploiting new technology adequately. Green, the principal of information college item in American Scientific Research Institution, showed great affirmative attitude to the item. He said it is the process of exploring new teaching method; it is a sharing experiment between college and student, textbook publishing industry and e-book manufacturer.

Handy, one of the professors in Oklahoma State University, is in charge of the experimental work. He said their college choosing iPad to assist teaching activities is not to catch the vogue of high technology, but to evaluate whether iPad is good for teaching and learning or not, whether iPad can improve students learning, how iPad blends into students daily life. At the same time, it is going to verify whether iPad can save the cost of textbook, whether students can blend into commercial society well after graduate. Of course, they are also testing the limitation of iPad in teaching. According their plan, Handy said, they will blend iPad into the whole teaching and learning. Such as, student can buy digital textbook and put the whole book into iPad. It can save about $100 cost, but also it is easy to search internet anytime.

In addition, student can convert video to iPad about their course or the presentation files before their class. Handy said it is easy to load e-book or ipad video without heavy schoolbag. What is more important, students can keep closed contact with their classmates and teachers through IM Platform whether in the class or not.

Of course, there are some persons in the American academic field calling in question about the experimental plan. In the 2010 spring semester, Princeton University and George Washington University network got some wrong because of students plentifully using iPad. Whats more, students may play any kinds of game or entertainment when using their iPad which will affect their school work. Experts predict that iPad and other kinds of e-book will play an important role in future education. Such as online teaching. In addition, the influence of teaching method will be more obvious, it will fundamentally change the traditional teaching method and structure of textbook.

Why use less Iframe

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The iframes provides a simple way to embed the content of a website to another site. But we need to be careful of using the iframe. iframe created scripts and css DOM elements created by 1-2 orders of magnitude slower than the other.

Use iframe page normally does not contain too many iframe, to create a DOM node takes time so they do not account for a large proportion. But it will bring some of the other issues: onload event and connection pooling (connection pool).

The Iframes blocking page load

Timely trigger window onload event is very important. onload event trigger the browser “busy” indicator stops, telling the user that the page has been loaded. When the onload event to load delay, it gives the user the feeling is that this web page is very slow.

window onload event to trigger all iframe loaded (contain elements inside). Safari and Chrome, set dynamically through JavaScript the iframe SRC avoid this blocking situation.

The only connection pool

The browser can only open a small number of connections to the web server. The old browser contains in Internet Explorer 6 & 7 and Firefox 2, only a domain name (hostname) open at the same time two connections. Increase in the number of restrictions in the new version of the browser. Safari 3 + and Opera 9 + for a domain name at the same time to open four connections, Chrome 1 +, IE 8, and Firefox 3 can be open at the same time six.

Some people may want to iframe will have its own separate connection pool, but not like this. The vast majority of browser, the main page and the iframe shared these connections. This means that when the iframe load resources may run out of all available connections, thereby blocking the loading of the main page resource. If the iframe content more than the contents of the home page, which of course is very good. But the content is usually the case, iframe was not the contents of the home page is important. Then iframe ran out of available connections is not worth. One solution is the important element of the main page is loaded, and then dynamically set the iframe SRC.

The top 10 U.S. sites use iframe. In most cases, they use it to load ad. This is understandable, also a logical solution, a simple way to load the ad service. But keep in mind, the iframe will give you the page performance impact. Whenever possible, do not use the iframe. When does require cautious use them.

How Voip Technology Can Change The Way Of Communication

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VOIP (Voice over Internet Protocol) is an innovative advanced technology that allows the user to communicate with people through the Internet Protocol. This unique phone technology can effectively reduce charges long-distance calls and provide a relatively less expensive way to communicate.

Thanks to this pioneering technology that has totally changed the mainstream media, which are often very expensive. Today, the benefits of VoIP are being widely used in many large and small organizations. People from different fields are using this service in their businesses as well as households. VOIP is also recognized by other technical names, such as Internet telephony, IP telephony and digital telephony.

Although the names of no matter, what really matters is the function, uniqueness, benefits and the low cost of using this technology. There are several advantages and can be used all by the simple use of this technology over the Internet. In general, to enable VOIP service in your home or business you only need a personal computer, telephone and Internet VOIP.

No doubt, by the use of technology can gain several advantages as low cost calls, the ability to keep in touch with people around the spread, the ability to call any location and many more.

However, in addition to its benefits, there are some drawbacks too, that you may face while using their services, for example, poor signal reception, security theft and any disruption in the VOIP, etc. However, as the popularity of VoIP is gaining increasing attention of people in the world, is constantly being improved every day so you can serve your 100% to its users.

There are many providers that can get VOIP service and you can easily connect your Internet connection with your phone. Therefore, if you really want to save the enormous costs on long distance then only allow VOIP technology services.
The systematic approach to software interactive voice response (IVR) is definitely a boon for many businesses. IVR is primarily useful for many other industries as well as public utility companies, mortgage companies, banks, Healthcare, Customer Relations Department, etc..

Apart from this, the most important features of the IVR software includes the ability to store responses made by callers, provide all the details minute to customers and must be capable of capturing voice responses tone or call Now, the question arises of how much money you have to pay for the technology that allows IVR in your business. Usually costs about $ 3,000 to $ 7,000 for the basic system. The cost may increase further if you want the more sophisticated software and advanced IVR.

Rock your favorite pastime with superior DISH Network Technology

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Want to be coddled with the terrific DISH Network technology? Switch on to DISH Network that will bring you all the pleasures of watching TV within the comforts of your own living room. The superb technology of DISH Network helps you to enjoy every variety of entertainment from different corners of the world. So if you get hold of DISH Networks HD Receivers, DVR Receivers, Standard DISH Network Receivers, Remotes & Accessories, DISH Network TV Everywhere and DISH Network Google TV, you can relish a wide array of on-demand movies, intercontinental news, celeb talks shows and lots more.

DISH Network DVR

You can make use of DISH Networks DVR to satiate your crave for television entertainment in the most comfy style. By virtue of ViP 922 Sling Loaded DVR, you can connect to two televisions, one out of which is in High Definition (HD) mode and another is in Standard Definition (SD) mode.

DISH Network also gives you the privilege to watch television everywhere you go with the help of built-in Sling technology and get your programming on the computer or mobile device. Through the DVR facility of DISH Network TV, you can enjoy one show while recording another at the same time. You can also record up to two shows while watching a pre-recorded version all at the same time. DISH Network provides you the chance to record more of what you love to watch with a 1 TB hard drive, which is the largest in US television industry.

DISH Network Standard Definition Receivers

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Remotes and Accessories of DISH Network

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DISH Network TV Everywhere

If you avail DISH Network TV Everywhere, you can have the opportunity to enjoy the same TV you watch at home also while travelling or carrying out several other activities. DISH Network provides you the access to all your preferred DISH Network channels and let you savor all kinds of DISH Network TV entertainment on your DISH Network DVR. Thus with DISH Networks DVR, you can enjoy whatever you want at your fingertips with DVR facility of DISH TV. You can relish local news, enlivening sports events and your most sought after TV shows on your PC and also on your mobile devices.

DISH Network Google TV

Just stay tuned to DISH Network Google TV that combines the power of Google search and the award-winning technology of DISH Network, to enjoy the very best of television entertainment with the very best of web. The limitless content of Internet on DISH Network Google TV gives you access to myriad top-notch content to add zing to your entertainment need.

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DISH Network presents an incredible technology that facilitates its clients to grab the best of television entertainment whenever they like. You can select from any of the extraordinary DISH Network packages and get yourself invigorated with its advanced technology. What more, you have got high quality DISH Network receivers to bring crystal-clear picture and sound output in your television.