The sixth session was held on 19th Jan 2011. In this session we had discussion about different types of software models, airports and airspace, about the runways and lighting systems.
Different types of software model
Basically three types of software model are there namely water flow model, spiral model and v model.
Water flow model
The water flow model is a sequential design process in which progress is seen as flowing steadily downwards (like a waterfall) through the different phases of software development life cycle. It has lot of disadvantages so only used for small and critical models. At any point of time this model cannot go back to previous stage and errors incurred in the first stage are carried to further stages there by decreasing the stability of the system. Any Request For Change (RFC‘s) by the clients cannot be incorporated in this model.
Spiral model
In this model, first a prototype model is built and shown to the clients for his approval and then every circle in the spiral model undergoes all the phases. The radius of the circle indicates the development of the project. Such a model is used for product development rather than software development. Spiral model is used whenever the goals of the project are unstable.
V model
The V-Model demonstrates the relationships between each phase of the development life cycle and its associated phase of testing. The main characteristics of this model are at no point of time the requirement is not tested. Used cases in this model form the test cases later. Such a model is used in designing aircrafts, fighters and bombs.
Runways
A runway is defined as rectangular area on a land aerodrome prepared for the landing and take-off of aircraft. Runways are named by a number between 01 and 36, which is generally one tenth of the magnetic azimuth of the runway's heading: a runway numbered 09 points east (90°), runway 18 is south (180°), runway 27 points west (270°) and runway 36 points to the north (360° rather than 0°). If there is more than one runway pointing in the same direction (parallel runways), each runway is identified by appending Left (L), Center (C) and Right (R) to the number. There are runway markings and signs on most large runways. Larger runways have a distance remaining sign (black box with white numbers). This sign uses a single number to indicate the thousands of feet remaining, so 7 will indicate 7,000 ft (2,134 m) remaining. The runway threshold is marked by a line of green lights. The active runway is the runway at an airport that is in use for takeoffs and landings. Since takeoffs and landings are usually done as close to into the wind as possible, wind direction generally determines the active runway.
And about the small project given to us is going on well and only little part of it is pending on it. Since our classes are started we can work only on after lunch. So we need a time extension at least till six in the evening. My interest is more towards the project. So the contents in the blog is going to be less for future sessions
