This blog will have a different look I hope, as soon as I figure out more on how to use this blog. We worked on a class project as a group today. We started to design a framework for software components. Software components are parts that make up a system. There can be many components in the system and they work independently or depend on another component in the system for help. A component request services from another part of the system being the interface or another component. There can be many components that make up a piece of software. Here is an interesting listing: XPLC
This article is about reusable software components
Here is another cool site that is about software component models.
It mentions a CAD system, etc.
This is very interesting about software components.
They compose a system and if we can’t see what they do we consider it a black box. For instance, I have no idea what is in an ATM. I know there is a card reader and that component could possibly be swapped out to another system. The card reader might be used at a entrance door or gate some place used with different components.
Back to the ATM black box. Inside it must have a component or software that connects to a database on a server. The keypad which is another component that can be used in other places. It might be used in a system for the government to give access to something secure.
There are other things they might consider with an ATM but might be more expensive. We can have a biometric finger print scanner. It would scan a finger print and determine if it was that person or not. Here is an article on finger print scanners by Tom Harris It would be more difficult to get into other than some 4 or more digit password that anyone could get from another person. Consideration to this and an iris biometric scanner as other components that can be used in security. Here is a good article on iris scanners One day I will have to get both and test them to see how they really work. They used to have retinal scanners but they would have such a bright light to use to scan the retina. It would blind the eye of a person who was scanned. An iris does not change over time with age as does the retina. The chance of mistaking a persons iris code to another is said to be 1 in 10 to the 78th power. Also the points of reference for a iris scanner are 200 and a fingerprint scanner being 60- 70 on a fingerprint.
