Verification, validation and input masks
Verification, validation and input masks Verification is when a human, through proofreading, checks data. You can do this in several ways: · Proof read the work on the monitor or on a print out · Check work on a monitor/print out with a manual copy · Get somebody else to check the work for you. · Two people typing in the same data, and if the data is the same it is accepted for processing. The only drawback to this is the unlikely event that the two people actually make the same mistake, and the wrong data is inputted. The advantages of verification are that data is less likely to be inaccurate. For many companies such as banks, data being accurate is crucial. However, it does take time to check all the data, and in cases such as having two people entering the data, this is using another person that could be doing other more important work, and two wages need to be paid which would lose money. Validation can be used in a database, where you set up the fields in a database so that only certain information can be entered. It's a check by the actual computer program and makes sure that the data is allowable. There are many different checks that can be performed: · Character type check - This check will make sure that the correct characters are entered into the computer. · Length check - Where the length of the word that has been entered is checked, and if this
Understudied relationships electronic friendships (e.g. relationships formed on the Internet).
'Understudied' relationships' 'electronic' friendships (e.g. relationships formed on the Internet). INTRODUCTION This is clearly a fascinating new area of research for social psychologists where study can be carried out through participant observation and on-line questionnaires. The concept of "electronic friendships" refers to all interpersonal contacts through the medium of the internet. The three main sources are email, usenets and chat rooms. EMAIL Email, or electronic mail, is a way of writing a message an, instead of posting it, you send via the internet to another person's postbox, where it awaits collection by the recipient. This means one can collect an email anywhere one has access to a computer. How does amail differ from other forms of communication? Prior to the age of electronic methods, communication was either: * Face to face (corporeal) * Phone to phone (voice only) * Written word ("snail mail") When we speak with someone face to face there are a host of channels through which we are communicating aside from actual words. In fact the non-verbal signals or paralanguage may be more important than the words themselves, for example body posture and eye gaze express liking for someone else. On the telephone some of these nonverbal signals are still there, such as pauses and tone of voice. In letters, all such signals have been removed or, if they are
E-Commerce is the buying and selling of products using an electronic service. Discuss.
E-Commerce Electronic Commerce, also known as E-Commerce is the buying and selling of products using an electronic service e.g. internet. More and more people everyday are buying over the internet as it is a much easier way of shopping for the things that you want. E-Commerce covers a lot of things such as electronic funds transfer, supply chain management, Internet marketing, online transaction processing, electronic data interchange (EDI), inventory management systems, and automated data collection systems. However, it isn't only buying products from a certain site e.g. Amazon, EBay but also upgrading an account from a standard to a premium account such as Megavideo. This type of E-Commerce is called "business to consumer", whereby the business is selling to the public instead of a certain business. Some common applications related to electronic commerce are the following: * Email * Enterprise content management * Instant messaging * Newsgroups * Online shopping and order tracking * Online banking * Online office suites * Domestic and international payment systems * Shopping cart software * Teleconferencing They way E-Commerce works is simple. It all starts from the customer buying the product from their computer off an E-Commerce website. This is then processed through the World Wide Web and inserted into the shopping cart program. The customer then is lead
The power of the NET
) Although some people may not be aware of the power the Internet holds upon us, it is essential that all users are aware of the dangers which lurk beyond the flashing text and fancy web pages. The term 'WWW' means 'World Wide Web' which is literally what the Internet is, as it is a way in which we are connected with the rest of the world and also to what is going on throughout the minds of certain individuals and governments. The 'Web' that the Internet is associated with, can weave in many different ways. It can lead us to many opportunities to help the needy and also to useful resources, or can even be a form of contact with loved ones. It maybe even the key to unlock problems around the world. However, not everything found on the Internet is safe and useful, as the dark side of the 'Web' can trap the user and lead them into grave problems. An example of this is being led into traps as a result of 'pop-ups', which can often be bogus and result in money loss or other unfortunate circumstances. Another example is that disturbing sites, which infringe human rights, may appear on the screen without the user even searching for them. Exemplar of this is reported incidents of users being subjected to sites urging people to commit suicide or even to make a bomb. A final illustration of my point is that on some sites shocking material can be found without the user knowing
How to use a database
Databases (Microsoft Access) DB › File(s) › Records › Fields A Field contains one item of data A record contains data about one person or thing A key field is a unique identifier to the record Validation This is the checking of data by software processing on input. This ensures the data is sensible It Prevents GIGO- Garbage In Garbage out. Examples of Validation are: Presence Check- Forces data to be entered e.g. required field. Range Check- Checks that the data entered is within the required range. E.g. with 1:9 only 1,2,3,4,5,6,7,8,9 are acceptable. An Idiot's guide to Microsoft Access Tables ) To set up a table: Open Microsoft Access and click on Tables, Then create table in Design View. Type in your fields under fieldname. Find a key field. This field must be totally unique to every entry. When you have found it, click on the field and then on the key icon in the top toolbar. Choose the Data type from what type of data will go in that entry. E.g. for title, text will be in that field so we choose text. For each field there are various options. You can choose how many characters can go in that field under field size, You can choose whether a field is required to have data in it, under Required. You can validate data to only allow certain data in that field. E.g. 1:9 means only the numbers 1,2,3,4,5,6,7,8,9 can be entered in
Oyster cards are the same size as credit cards but contain an aerial and a small microchip that holds the memory. the attached Ariel stores information about the ticket .In my community at Tube stations, touch your Oyster card on a card reader at the star
Oyster card In my local community the need is the transport .The problem is that we need transport so that we can go from place to place as we like, and make it faster and more efficient and easy to travel. . Oyster cards meet the needs by making it faster, and quick for people my community to go where they want. About oyster card Oyster card is my community's smartcard. It can store your season ticket or Pre Pay ticket. Oyster cards can be used more than once, when your ticket expires, simply buy another ticket on the same Oyster card, and also when your Pre Pay runs out, just top it up. . Oyster cards are the same size as credit cards but contain an aerial and a small microchip that holds the memory. the attached Ariel stores information about the ticket .In my community at Tube stations, touch your Oyster card on a card reader at the start and end of your journey, in buses always touch your Oyster card on the card reader as you go inside the bus. The tickets are sold differently. Oyster card are available to adults and holders of valid Student Oyster photo cards in my community Oyster card used in my community In my community the oyster card are used to make my communities transport fast and efficient and quick to travel from place to place in my community , and also it can speed travel by reducing the number of people paying cash to bus drivers and the
![Proposal on making a website [Unit 2]](https://mbt-essays-prod-public.s3.eu-west-1.amazonaws.com/856738/listing/856738_1.jpg)
Proposal on making a website [Unit 2]
My website is intended for a large audience; those who do not have the recycling bins/boxes and would like to order them, those who already have them but would like to learn how to use them and what to put into them; school/parents who would like to educate their children about the importance of the environment and thus recycling (the main theme). Others, also, may visit the website just out of interest or to increase their prior general knowledge further. My website will contain content in reference with the scenario. Each different bin/box will have its own page with its picture, how it can be used (may even do this in animation form), what materials to/NOT put inside each different box. The homepage will give a brief-detailed introduction of Recycle GB's aims and will progressively link the user to the next page (black bins), using the navigation system, in terms of the component's importance in terms of everyday recycling. Each page will contain graphical 'faces' corresponding to how useful the user has found that particular page and, when clicked on, will link them to the final page where (a requirement in the scenario) they will be able to submit written feedback on how they felt. The 6th page is a page dedicated to young people, educating them about the effects that not-recycling can eventually have on the planet and, therefore, us. The style will be consistent with
History of the Internet
ASSIGNMENT 1 Development of the Internet E-Commerce, BTEC National Diploma in Computing, year 1 To: Adam Smith From: Marina Guseva Date: 31 October 2002 History of the Internet The global communications network has come a long way since 1969, when a few room-sized machines connected four universities in America, to today where the internet underpins corporate networking. In 1957 The USSR launches Sputnik, the first artificial earth satellite. In response, the United States forms the Advanced Research Projects Agency (ARPA) within the Department of Defense (DoD) to establish US lead in science and technology applicable to the military. They were trying to figure out an important strategic problem: they needed a military network that could survive a nuclear strike, decentralized so that if any locations (cities) in the U.S. were attacked, the military could still have control. Communicational network of the day was chained point-to-point which meant that each link was dependent on the link before it. This is when an idea of a complex network connection was conceived, the new structure would allow information to find its own way to the destination point even if some part of the network would be destroyed. 961 In July Leonard Kleinrock publishes the first paper on packet switching theory, which forms the basis for the creation of the Internet. 965 Ted Nelson
The Internet - is it useful or all hype?
The Internet: is it useful or all hype? The Internet is a vast computer network of computer networks. Estimates are that more than 30 million computer users populated this electronic global village by late 1996 and that some 8 to 10 million had access to the World Wide Web. During 1996, the number of registered commercial sites on the Internet increased more than 500%. The Internet is accessible in more than 100 countries. Practically speaking, the Internet, also referred to as the Information Superhighway, is composed of people, hardware, and software. With the proper equipment, you can sit at your computer and communicate with someone any place in the world as long as that person also has the proper equipment. You can also use the Internet to access vast amounts of information, including text, graphics, sound, and video. You can search, send e-mail, receive electronic newsletters, and "chat" with others online. In the late 1960s, a group of scientists wanted to share information with others working on similar research projects, many of whom were government contractors working at large universities. Thus, ARPAnet was spawned. When people at these institutions discovered the enormous utility of a network that linked them with colleagues around the world, the project mushroomed. As the network expanded throughout the 1970s, members of the computer industry began to
The Technologies I use.
The Technologies I use. Introduction. I am writing this essay to show and compare the technologies I use each and everyday. In this essay you will find out what technologies I use and why I use them whether it is for personal, social or professional use. Personal. I use technology for personal use for; hobbies, homework and entertainment. The technologies I use are: * Television- I use television for entertainment to relax after a busy day or to enjoy my favourite soaps. I also use it to entertain family and friends which creates great conversation. * DVD's/DVD players- I use DVD's and DVD players for entertainment to enjoy a good film with sound effects and a better quality picture compared to VHS tapes that had poor quality sound and were bulky. * CD player- I use CD players to listen to music for entertainment. I use music to unwind and lift my spirits if I'm upset or to get me in a happy mood if I'm going out at the weekend. * Computer- I use computers for entertainment and homework. For entertainment I play games and surf the internet for anything which interests me. For homework I research on Microsoft Encarta and the internet and also use word or PowerPoint for assignments and presentations. * Play station- I use the play station for entertainment when I have spare time on my hands. It helps to keep me mentally challenged and I enjoy playing on racing and
