Code duplication or copying a code fragment and then reuse by pasting with or without any
modifications is a well known code smell in software maintenance. Several studies show …

The ability to evolve software rapidly and reliably is a major challenge for software
engineering. In this introductory chapter we start with a historic overview of the research …

To maintain and understand large applications, it is important to know their architecture. The
first problem is that unlike classes and packages, architecture is not explicitly represented in …

Software engineers often inspect program differences when reviewing others' code
changes, when writing check-in comments, or when determining why a program behaves …

Software product line engineering is an efficient means to generate a set of tailored software
products from a common implementation. However, adopting a product-line approach poses …

Topic models are generative probabilistic models which have been applied to information
retrieval to automatically organize and provide structure to a text corpus. Topic models …

After more than 10 years, Aspect-Oriented Programming (AOP) is still a controversial idea.
While the concept of aspects appeals to everyone's intuitions, concrete AOP solutions often …

Software clones are considered harmful in software maintenance and evolution. However,
despite a decade of active research, there is a marked lack of work in the detection and …

Topics are collections of words that co-occur frequently in a text corpus. Topics have been
found to be effective tools for describing the major themes spanning a corpus. Using such …

During its lifecycle, the internal structure of a software system undergoes continuous
modifications. These changes push away the source code from its original design, often …