Database Management System

Our lecturer started to explain definition of DATABASE and DMS (Database Management System). I didn’t know about what is DMS at all. But our lecturer gave us clear explanation and I realized that database and its fellows are very important for us. There are 4 types of physical database and another 4 of DMS. Under physical database, there are data item, relationships, constraints and schema. In relationships, there are three types of relationships. They are one to one, one to many and many to many. Under the DMS, first Define, create and organize a database, then, input data, process data, maintain data integrity and security, and query database.

Database system, it’s quite interesting for me. DMS software together with the database is called a database system. Also, we knew what database models are and that there are four types of database models. Moreover, there is a part which is difficult to understand. It’s database terminology. Under that topic, there are field which represent column of database table, record which represent row, key field which represent primary field, table which represent collection of record, relational database, and objects. And our lecturer showed us how the object relational database works out. It’s like tree or brunch system.

Our lecturer told us not to forget what data, DMS, what the 4 components is of database are and definition of relations, 3 types of relations and 4 types of database models. She taught us how to access and work with the Microsoft Access. I am happy to know how to use it. Then, she gave us in-class assignment and we did it.

Thank you.

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Google Apps

Hello, again. Today I will tell you guys what we have learned about Google Apps. Our lecturer explained us web application (Google applications) and the examples of web development tools and Google apps in this week class. She gave us a clarification of Google apps. It is a service from Google providing independently customizable versions of several Google products under a custom domain name. I knew more than it from that course. We acknowledged about Google Plus +, Google Document, G-mail, Google Image, Google Books, Google Translate and others. These all are web tools and there are other applications that I knew in the time when she taught us this course. 

And our lecturer explained us how to create own website in detail by using Google site where we can easily build and publish web sites and guided us to do a simple website. Then we got an assignment to create website by using Google site as a group job.

Thank you and don’t forget to come back later.

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Triple W

What is WWW? Everybody knows that WWW is World Wide Web, but our lecturer explained us what is that WWW deeply. WWW is an application that uses those transport functions and service on Internet. I use daily webpage and website. But I didn’t know what they are actually before that class. Now, I knew the definition of webpage and website from this course.

A Webpage is just a part of Web site and a Web Site is a collection of related web pages found at a single address. This course helped me a lot. Then, our lecturer explained that there are six categories of web 2.0 sites. They are social networking, mashups, aggregators, social media, post casting and video casting and the last one as web applications. And we got deeply clarifications of those.

My lecturer explained what the web information systems or online information systems are. There are 2 types of web information systems that I knew from that course. They are informational and transactional system. That was a bit difficult to understand for me. Anyway, I knew much knowledge about web pages, types of webpage, web site and others more than before.

Thank you. Have a great day.

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Information System Development Methodologies

How I understand about this topic? Ok, here is answer that Information System Development Methodologies (ISDM) is a collection of procedure, techniques, tools and documentation aids which will help the system developers in their efforts to implement a new information system. There are many different methodologies existing and used in systems development. A methodology is more than just a method or a process model. It is a work breakdown structure that provides guidelines of what to do and when to do it. It is technique on how to do what needs to be done. It is advice on how to manage the quality of the results. Different types of system development methodologies are used in designing information system. It depends on the actual requirement of the system.

Then our lecturer explained us the types of methodology and moved to information engineering (IE). We knew what Jackson System Development is and how it is. JDS is a method of system development that covers the software life cycle either directly or, by providing a framework into which more specialized techniques can fit. She taught us prototyping / interactive approach and structure approach (SDLC). SDLC, prototyping and JDS focus on data flow diagram (DFD). But IE is used to develop database. Then, she asked us to make a group in 3 members, to find one methodology and apply in a development system. We had done this as in class activities. 

Thank you.

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