Interior Point Stabilization (IPS) is an acceleration method for Column Generation algorithms. Like previous stabilization techniques, it addresses degeneracy problems and convergence difficulties by preventing dual variables from taking extreme values. IPS is however different since it selects a dual solution inside the optimal dual space rather than retrieving an extreme point solution from t...

We often use the notation ( ) to denote either ( ) or ( ). For example, ( )− ( ) denotes any one of ( )− ( ), ( )− ( ), ( )− ( ) and ( )− ( ). A point in R is called a point of local minimum (resp. local maximum) of a sample function if there exists a neighborhood of such that ( ) = ( ) (resp. ( ) = ( )). A point of either local minimum or local maximum is called an extreme-point. The following...

Requirements engineering is a core practice within eXtreme Programming. Practising teams learn to not abandon any of the interconnected core practices. The continuous feedback teaches the team that they will develop at a faster and more reliable pace with the full set of practices. This paper shares an experience of how teams could accelerate development out of necessity, while maintaining thei...

This paper presents an early empirical study on Extreme Programming practices employing a qualitative action research method. The study was conducted on university students doing real commercial development projects to gain an insight into the problems faced by the new developers in adopting these agile practices. The aim of the study was to investigate the effects of the XP practices on the qu...

Control chart pattern recognition (CCPR) is an important issue in statistical process control because unnatural control chart patterns (CCPs) exhibited on control charts can be associated with specific causes that adversely affect the manufacturing processes. In recent years, many machine learning techniques [e.g., artificial neural networks (ANNs) and support vector machines (SVMs)] have been ...

This paper presents a single case study reporting the experiences of introducing extreme programming (XP) in a small development project at Online Telemarketing in Lund, Sweden. The project was a success despite the fact that the customer had a poor idea of the system required at the start of the development. This success is partly due to the introduction of practically all of the XP practices....

Efficient data movement is essential for extreme-scale parallel visualization and analysis algorithms. In this research, we benchmark and optimize the performance of collective and point-to-point communication patterns for data-parallel visualization of scalar and vector data. Two such communication patterns are global reduction and local nearest-neighbor communication. We implement scalable al...

The paper reports on the results of a recent study on student perceptions on agile practices. The study involved forty-five students enrolled in three different academic programs (Diploma, Bachelor’s and Master’s) in two institutions to determine their perceptions of the use of extreme programming practices in doing their design and coding assignments. Overwhelmingly, students’ experiences were...