"Explain what is meant by Rapid Applications Development (RAD) and discuss the reasons for the increased use of this method for information systems development in recent years".
Computer Based Information Systems Assignment 2 Leslie Spiers 8th December 2001 "Explain what is meant by Rapid Applications Development (RAD) and discuss the reasons for the increased use of this method for information systems development in recent years" Bocij defines RAD as "a method of developing information systems which uses prototyping to achieve user involvement and faster development compared to traditional methods such as SSADM"1 Bocij goes on to clarify his understanding of the term "prototyping" and defines it as "a preliminary version of a part or a framework of all of an information system that can be reviewed by end-users."2 He furthermore states that the process is iterative and that end-user involvement is considerable in proposing modifications prior to the development of further prototypes and in advance of the construction of the final solution. In a similar way, Turban McLean and Wetherbe refer to the importance of iteration and the development of the user interface as a mission critical component of RAD and thus explaining its proximity to prototyping3 They go on to outline the components and capabilities of a RAD system which include such packages as: The development of an appropriate Graphical User Interface A library of common objects such as dialogue boxes and icons A code generator that automatically writes programmes to implement
"Heuristic evaluation is an essential element of systems' development".
BT302 - Assignment 2 "Heuristic evaluation is an essential element of systems' development" Jakob Nielsen (1990) describes heuristic evaluations as "a systematic inspection of a user interface design for usability", with its goal being "to find the usability problems in the design so that they can be attended to as part of an iterative design process". Heuristic evaluation is based around the theory of the usability of a system (computer program or website etc.), developed by Jakob Nielsen and Ralf Molich as "a method for structuring the critique of a system using a set of relatively simple and general heuristics" (Abowd, 1994). It is traditionally thought of as a function that must be carried out by a group to enjoy more of the benefits of feedback from various evaluators. Around 5 evaluators can usually discover 75% of a systems usability faults according to Nielsen (2003). Abowd (1994) describes heuristic evaluation as a "design time evaluation technique", as it is easier to fix many problems with a system at the design stage. In relation to the statement "heuristic evaluation is an essential element of systems' development" and its relevance, it is best to first look at the benefits of using a heuristic evaluation. UsabilityNet (2003) outlines the five following benefits of this technique: . The method provides quick and relatively cheap feedback to designers. The
"Information wants to be free". Discuss the arguments for and against this proposition (widely circulated on the internet and often attributed to Steward Brand, author of The Media Lab, 1987).
Title:" Information wants to be free". Discuss the arguments for and against this proposition (widely circulated on the internet and often attributed to Steward Brand, author of The Media Lab, 1987). To what extent do you consider that it expresses a meaningful and important idea? Registration Number: 030165609 Module: Information Systems and the Information Society Date: 19/12/03 Module Coordinator: Dr. Mark Sanderson Module Code: INF6400 . Abstract/ Summary This essay aims to describe the different views concerning the trend "Information wants to be free." There are different kinds of opinions concerning this matter. The supporters claim that the free access of information prevail certain human rights like liberty and democracy. But also it creates substantial problems concerning the protection of personal information and the formation of laws that will assure data protection. As a result the role of the state is fundamental; in order to create those restrictions that will assure that the citizens will be able to have access to their own information and at the same time to protect them from the illegal access of information. Free software from the other hand has to be free of charge because it is the mean which connects technology with humans. This essay concludes that it is very difficult to make a decision whether information should be free or not but the
The topic we have chosen to investigate for our maths assignment is 'sequences'. In order to do this we will firstly show a diagram of matchstick shapes increasing in size.
Introduction The topic we have chosen to investigate for our maths assignment is 'sequences'. In order to do this we will firstly show a diagram of matchstick shapes increasing in size. Our first chosen stage is a triangle, in the second stage we will draw a table of results, the top line representing the orders of terms and the bottom line will represent the number of matchsticks used to make the sequence. From this table we will be able to see the 'number increase' in each step of the sequence. With this information we hope to find the formula for the 'nth term'. The 'nth term' is merely a representation of the order of sequence; therefore it can be substituted for any value in sequence. By using the formula we should be able to predict any number of the sequence. In order to find our formula we must have a consistent increase in our number of matchsticks. Since we have this we can look at number 4 in the order of sequence and compare it with the corresponding number of matchsticks. We see that the number of matchsticks is twice the size of number 4 plus 1. This is written as 2n+1 Where n represents the order of sequence. The formula 2n allows us to work out any number in the sequence. Working out the difference in the number of matchsticks derives this formula (in this case the result is 2) we then multiply this difference by the order of sequence (this gives us
So in order to understand what the main areas where organisation should be aware of securing data, we should understand the terminologies like footprinting, scanning and enumeration
Introduction to assignment: This assignment is about exploring some of the network security issues in organisations. The information and data about any organisation is very important for them to be protect from outside real and cyber world. The information should be kept according to the standards of security so that it can be protected from hackers. So in order to understand what the main areas where organisation should be aware of securing data, we should understand the terminologies like footprinting, scanning and enumeration. These three terminologies can be called as three steps for hackers to explore the secrete information of an organisation. In this assignment we will get the basic understand of footprinting i.e. gathering information about organization's network, scanning ports and enumeration, the actual process of gaining information access of an organization. We will take 5 internet organizations and will test there networks via different softwares like Nmap, Nbrute, Sam Spade and many others. During testing we will follow a procedure which identifies the internal components of the examined websites from its webpages that are open to public using techniques like WHOIS, DNS, Interrogations and others. Also getting the range of IP addresses of network of that organization and the host machines that are active within an organisation. After getting the
Official crime statistics can be knocked down and so far sideways those responsible criminologists ignore them. Discuss.
Official crime statistics can be knocked down and so far sideways those responsible criminologists ignore them. Discuss. Name of module: Criminal Justice Policy Name of lecturer: Coretta Phillips Date of submission: 7th November 2002 Name of student: Sharon Ingrid Kwok (200210386) Introduction Social scientist has been aware of the pitfalls and limitation in official crime statistics. Arguments have surrounded the official crime statistics to be sideways, and they can be distorted by social and institutional factors. (Reiner, Maguire and Coleman et al) In this assignment we will analyse the problems surrounding the interpretation of official crime statistics and illustrate how they are constructed and consequently where their systematic biases lies. Dark figures-non-reported and non-recorded criminal behaviour The core problem interpretating the official statistics on crimes that have been recorded by the police arise from the fact that they are incomplete and biased. For an event to be recorded and known to police category it has to overcome two hurdles: Addressing of Issues and Appropriate handling of procedures. Criminal behaviour must come to the attention of the police and should be recorded as such by the police using his appropriate procedures. Many criminal events may fail to enter the record at either stage. They may not come to be known to the police at
Tektronix has used a Phased Implementation The Snowball Approach strategy to implement ERP, which is one of the main reasons of its success. In other words, the big-bang approach is avoided until there is sufficient confidence (e.g. implementing
Phased implementation approach instead of full-scale Tektronix has used a Phased Implementation - The Snowball Approach strategy to implement ERP, which is one of the main reasons of its success. In other words, the "big-bang" approach is avoided until there is sufficient confidence (e.g. implementing all three divisional systems together for Europe). However, the effects are more than just breaking down project implementation into phases or waves. The approach gathers momentum, keeps morale high through constant victories and maintains clear vision and objective of end state - all of which are important for a long project. By starting with the baseline, many technical issues could be worked out before tackling on more difficult business challenges. This greatly reduces the risk of a complex implementation. Also, the approach allows for regular feedback and reviews after each phase. Hence, encouraging learning from previous experience and mistakes. Project management as well as technical and functional skills also start to build up along the way. Thus, each phase builds on the previous, accumulating knowledge and skills throughout the project lifespan. A phased approach also provides a clearly visible structure for reporting of progress (with the completion of each phase). This helps ensure that the Board continues to support the high cost and long timeline of
"Achieving high data rates using TCP/IP over satellite networks can be difficult" - review and discuss.
Coursework 1 Question 1 a). "Achieving high data rates using TCP/IP over satellite networks can be difficult"- review and discuss some of the reasons TCP/IP has difficulty with satellite links, including the following issues: IP Throughput, IP Time To Live, IP Fragmentation, TCP Throughput and Throughput Expectations, TCP Sequence Numbers, TCP Transmission Window, Slow Start, and Congestion Avoidance. Achieving high data rates using Transmission Control Protocol & Internet Protocol (TCP/IP) over satellite networks can be difficult because satellite links have a high latency, which causes the reduction of the performance of some protocols like TCP/IP that are commonly used. The main reason to this problem is the design of TCP/IP. They were not designed to be applied in wireless environment, they were actually meant to be used in fixed networks only that are end-to-end and based on reliability and connection orientation. For example, the Internet, which is the biggest computer network consisting of millions of terminals is based on the TCP/IP protocol architecture, since it is a fixed Virtual Area Network (VAN). The architecture of TCP was designed to be used in networks with high Bit Error Rates (BERs), and it will not work well in wireless environment, where losses are due to high BERs. Besides, because IP relies on end-to-end data verification, it is unsuitable
"Automatic model transformations using extended UML object diagrams in modeling environments".
SC207 Software Engineering - Term Paper 2003 Automatic Model Transformations Using Extended UML Object Diagrams in Modeling Environments Chathapuram V Satish Year 2 Computer Engineering Nanyang Technological University [email protected] TOPIC DETAILS "Automatic model transformations using extended UML object diagrams in modeling environments". Author: Dragan Milicev Source: Software Engineering, IEEE Transactions, Volume: 28, Issue: 4, Apr 2002, Page(s): 413-431 ABOUT THE AUTHOR Dragan Milicev received the diploma degree in 1993, Msc degree in 1995, and PhD degree in 2001 all in computer science at the School of Electrical Engineering at the University of Belgrade, Yugoslavia. His research interests include object oriented software engineering, metamodeling and information systems. His personal webpage can be found at http://www.rcub.bg.ac.yu/~dmilicev. INTRODUCTION Modeling is a critical part of all the activities that are involved in the deployment of an engineering system. Modeling tools that provide an interface to implement, apply, check and visualize the modeling process are available and make the entire process less cumbersome and tedious. One of the most important features of the modeling tools is the automatic generation of an output and this is the main focus of discussion in the above stated paper. The output can be documentation, source code, net
Point Blank - The purpose of this essay is to identify why the introductory sequence attracts a certain type of target audience.
Grosse Point Blank Essay The purpose of this essay is to identify why the introductory sequence attracts a certain type of target audience. By viewing the opening sequence you gain an immediate feeling or understanding that the movie is aimed at people aged between 20 and 30. At this age violence is the norm thing to see on television and is not that shocking to the age group in comparison of an age group of 50-60. The events that take place in the opening sequence are the conversation about Martin Blank the professional killer's ten year High School Reunion Party with his secretary/business partner Marcella. Whilst the conversation is happening Blank spots the cyclist assassin and then takes aim and shoots him before the cyclist reaches his intended target, which Blank has to protect. Then when the cyclist is shot he hits a car and comes off his bike. Whilst Blank is packing his equipment away, out comes his rival Grosse who then kills the man and his bodyguards which the cyclist was meant to kill. The opening credit sequence opens with a black background perhaps signalling death, and the song 'I can see clearly now' is played over both the opening credit sequence and opening assassination sequence. This song gives off an air of black humour in the mood of the film. This seems very hypocritical because the song is uplifting and the sequence is very violent and serious.