Data Warehousing and Data Mining

The Online Lecture and Discussion Blog for Data Warehousing and Data Mining course.

Friday, February 09, 2007

How is Smoothing by Bin Medians?

Dear all,

Can anyone shed some light on how Smoothing by Bin Medians is performed?

Thanks.

Regards.

Tuesday, February 06, 2007

Mid-Sem Examination

Fellow classmates,

This post is to notify you guys that though Dr. Teh might be late this Friday, the mid-semester exam for Data Warehousing and Data Mining class will be conducted as usual, i.e. 6pm. If he's late, please wait patiently as he has to rush back from his training in KL.

Thank you for your cooperation and good luck everyone.

Regards.

Monday, February 05, 2007

University Hospital Star Schema


Justifications for fields/attributes used:

Table: Doctor
Purpose:
1. To be able to identify which department a particular doctor is from and the
number of positions the doctor is currently holding so to be able to determine
the doctor’s productivity, performance or KPI.

2. To enable the tracking of the number of doctors in the hospital to ensure
there are sufficient numbers to serve each of the departments in the hospital.

Table: Patient
Purpose:
1. To be able to identify common reasons for patient’s admittance so that the
hospital can take the necessary precautions to be better prepared, such as adding
more hospital bed if patients’ usually are admitted for surgeries and require long
length of stay.

2. To be able to track and project estimateions based on the revenues/income generated from the patients' total bills.

Table: Time
Purpose:
1. To be able to analyze the peak time of patient admittance into the hospital based
on Hourly, Daily, Monthly and Yearly basis.

Table: Fact Table
Purpose:
1. To be able to see the analysis from all three of the other dimension tables, i.e.
Doctor, Patient and Time so that a suitable Charge rate could be determined that
will be fair to both doctors and patients. For example, doctors working on peak
hour may have to handle more patients and should be paid a higher rate.

2. To be able to conduct counts for all type of measures from each dimension table
so to be able to assist in determining the charges.