Theodore Chaikalis

• Doctor of Philosophy
• Adjunct Lecturer at University of Macedonia

The last decade marked undeniably the leading role of web services and the establishment of service-oriented architectures. Indeed, it is nowadays hard to find a contemporary software application that does not use at least one third-party web service. The main driver for this paradigm shift, lies in the benefits that decoupled, cloud-based services...

Nowadays the majority of cloud applications are developed based on the Service-Oriented Architecture (SOA) paradigm. Large-scale applications are structured as a collection of well-integrated services that are deployed in public, private or hybrid cloud. Despite the inherent benefits that service-based cloud development provides, the process is far...

Technical Debt (TD) reflects problems in software maintainability along evolution. TD principal is defined as the effort required for refactoring an existing system to an ideal one (a.k.a. optimal) that suffers from no maintainability problems. One of the open problems in the TD community is that ideal versions of systems do not exist, and there ar...

Contemporary software systems evolve over a large number of versions due to the need for continuous adaptive and corrective maintenance. The duration and cost of this process call for software systems that can be extended or modified in an effortless and rapid way. To this end, the maintainability of such systems can be enhanced by taking advantage...

As in any academic discipline, the evaluation of proposed methodologies and techniques is of vital importance for assessing the validity of novel ideas or findings in Software Engineering. Over the years, a large number of evaluation approaches have been employed, some of them drawn from other domains and other particularly developed for the needs...

As in any academic discipline, the evaluation of proposed methodologies and techniques is of vital importance for assessing the validity of novel ideas or findings in Software Engineering. Over the years, a large number of evaluation approaches have been employed, some of them drawn from other domains and other particularly developed for the needs...

Libraries are increasingly employed in software practice to speed up the development process by reusing available and tested components. Software systems, that are available as libraries, are expected to be well-designed, because they have to adhere to specific principles, in order to accommodate the needs of multiple clients in a robust and stable...

Libraries are increasingly employed in software practice to speed up the development process by reusing available and tested components. Software systems, that are available as libraries, are expected to be well-designed, because they have to adhere to specific principles, in order to accommodate the needs of multiple clients in a robust and stable...

Software development based on third-party libraries is becoming increasingly popular in recent years. Nowadays, the plethora of open-source libraries that are freely available to developers, offer great reuse opportunities, with relatively low cost. However, the reuse process is in many cases rather ad-hoc. In this paper, we investigate reuse proce...

The analysis of software evolution by means of mining public repositories has been established as one of the dominant approaches for empirical studies in software engineering. However, even the investigation of the simplest research question demands a mazy process involving installation and configuration of tools, climbing their learning curve and...

Accumulated technical debt can be alleviated by means of refactoring application aiming at architectural improvement. A prerequisite for wide scale refactoring application is the automated identification of the corresponding refactoring opportunities, or code smells. One of the major architectural problems that has received limited attention is the...

The implementation of a functional requirement is often distributed across several modules posing difficulties to software maintenance. In this paper, we attempt to quantify the extent of feature scattering and study its evolution with the passage of software versions. To this end, we trace the classes and methods involved in the implementation of...

Version Control and Bug Tracking Systems are essential tools in contemporary software development methods and are widely employed by development teams for systematic source code revision tracking and effective bug management. By combining information provided from both tools, a maintainer could shed light to various qualitative and quantitative cha...

Evolving software systems can be systematically studied by treating them as networks and employing ideas and techniques from the field of Social Network Analysis. SEANets is an Eclipse plugin that allows the analysis of multiple software versions and the extraction and visualization of network properties required to investigate evolutionary trends...

The identification of software components that implement a certain feature is vital for understanding and reverse engineering an existing software system. Requirements traceability allows the investigation of scattering and tangling requirements which hinder significantly software maintenance. Even worse than feature scattering in a number of modul...