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Jarvis’ March

In computational geometry, Jarvis’ march or gift wrapping algorithm is used to compute the convex hull of a given set of points. The algorithm has broad range of applications in mathematics and computer science practically in pattern recognition, image processing, statistics, geographic information system (GIS) and game theory. Convex hull or convex envelope of a…

The Quickening

This (trailer) video is about my journey to Australia in 2015. I traveled to 3 major cities (Melbourne, Sydney and Brisbane) to participate in startup events and meeting entrepreneurs and investors. And I failed again big time and quite miserably. Then, I receded to focus on development and took on the feedbacks I received and…

My New Adventure

The past four weeks were very exciting but filled with emotion and sorrows. Since the inception of a new startup sometime mid June, I have been working non-stop building ideas and pulling pieces together and neglected a lot of feelings especially the feelings and needs of people surrounding me. We had two deadlines to meet. One…

DocBook XML on OSX

I have written some technical documentations using DocBook XML and then published them as HTML. You can find my previous post about DocBook Publishing and the technical documentations here. My site was hacked one or two years ago. The worst thing was that I did not have a backup copy of the HTML. The DocBook…

Ada and Multiple Inheritance

When developing an information system which computes real-life data, one of the most common problems a software developer may encounter is multiple inheritance. Inheritance is one of the four aspects in Object-Oriented Programming (OOP). What is Object-Oriented? Object-oriented technique organizes software as collection of discrete objects incorporate with data structures and behaviors. Take a software that…

Android is a dirty phone

Android has been regarded as a savior to those who hate to be controlled and tied down by Apple’s strictly guarded iPhone. It is also one of the competitors closest to iPhone. While Apple’s latest iPhone 4 has a new feature called “FaceTime”, the Android on the other hand gets Sex. FaceTime is a feature…

iOS 4.0.1

Yesterday, Apple released iOS 4 update, which was one day before its press conference. The iOS 4.0.1 has obviously made the signal bar look taller. According to various media and blogs, the update is reportedly to have new software (new formula) to calculate the signal strength and to display it more accurately. Read here and…