Welcome to ecourse.org: the Information Infrastructure for Education in the information age! This system allows instructors from any school or college (including home schools and training programs) to teach either onsite or online courses . It allows students to manage all their ongoing school works and past academic records at one location.
Our mission is to redefine the model of learning and re-engineer its process by providing innovative administrative and instructional technologies. Click here for our beliefs.
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Could another species someday replace us as Earth's dominant intelligent life and, if so, which species?
(324 Week 1 Outline) (by Liping Liu) Concept of Database:
Data, Information, and Knowledge
Database is a set of records well organized using a particular logical data model
Records: A records is an array of observed characteristics (or attributes) on one object (entity)
Well Organized: 1) related records are connected; 2) no unnecessary redundancy
Logical Data Models: Hierarchical, Network, Relational
Database Development Process
Data Modeling: Entity, Attribute, relationships
Database Implementation: DBMS
Data Modeling (Bank Example: Customers, Accounts, and Transactions): Identify Objects, Attributes, and Relationships
Identify Objects (entities): (1) objects can be tangible such as a customer or intangible such as an account or meeting; (2) objects must be observable at an instant in time; (3) objects must have multiple attributes (or dimensions) to be observed... more >>
(324 Week 2 (Labor Day Week) Outline) (by Liping Liu)
Review:
Homework Question to Review
Database Concepts:
A record is an array of observations on one entity: Entity (ERD) <—> Record (RM)
Attributes are properties or dimensions of entities (business objects) to be observed, but attributes must be relevant, singled valued, and non-foreign... more >>
This system is designed and developed by Professor Liping Liu with financial support from Southern Illinois University at Carbondale. It evolved from a prior version called CourseWeb (for courses prior to Year 2000) and UXTEND.COM and www.e-course.org.
