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Displaying 1-23 out of 23 total
Using Ensembles for Web Effort Estimation
Found in: 2013 ACM/IEEE International Symposium on Empirical Software Engineering and Measurement (ESEM)
By Damir Azhar,Patricia Riddle,Emilia Mendes,Nikolaos Mittas,Lefteris Angelis
Issue Date:October 2013
pp. 173-182
Background: Despite the number of Web effort estimation techniques investigated, there is no consensus as to which technique produces the most accurate estimates, an issue shared by effort estimation in the general software estimation domain. A previous st...
A Structural Equation Modeling Approach of the Toll-Like Receptor Signaling Pathway in Chronic Lymphocytic Leukemia
Found in: 2013 24th International Workshop on Database and Expert Systems Applications (DEXA)
By Athina Tsanousa,Lefteris Angelis,Stavroula Ntoufa,Nikos Papakonstantinou,Kostas Stamatopoulos
Issue Date:August 2013
pp. 71-75
Gene pathway identification is an open and active research area that has attracted the interest not only of biomedical scientists but also of a large number of researchers from disciplines related to knowledge discovery from biological data. In this paper,...
Ranking and Clustering Software Cost Estimation Models through a Multiple Comparisons Algorithm
Found in: IEEE Transactions on Software Engineering
By Nikolaos Mittas,Lefteris Angelis
Issue Date:April 2013
pp. 537-551
Software Cost Estimation can be described as the process of predicting the most realistic effort required to complete a software project. Due to the strong relationship of accurate effort estimations with many crucial project management activities, the res...
Analyzing Measurements of the R Statistical Open Source Software
Found in: 2012 35th Annual IEEE Software Engineering Workshop (SEW)
By Sophia Voulgaropoulou,Georgios Spanos,Lefteris Angelis
Issue Date:October 2012
pp. 1-10
Software quality is one of the main goals of effective programming. Although it has a quite ambiguous meaning, quality can be measured by several metrics, which have been appropriately formulated through the years. Software measurement is a particularly im...
Investigating the Impact of Personality and Temperament Traits on Pair Programming: A Controlled Experiment Replication
Found in: 2012 Eighth International Conference on the Quality of Information and Communications Technology (QUATIC)
By Panagiotis Sfetsos,Panagiotis Adamidis,Lefteris Angelis,Ioannis Stamelos,Ignatios Deligiannis
Issue Date:September 2012
pp. 57-65
This paper presents the partial results of an extended replicated pair programming experiment, conducted at the Alexander Technological Educational Institute of Thessaloniki, Greece during the two semesters of the year 2009-10. The entire study involved 16...
An Investigation of Software Effort Phase Distribution Using Compositional Data Analysis
Found in: 2012 38th EUROMICRO Conference on Software Engineering and Advanced Applications (SEAA)
By Panagiota Chatzipetrou,Efi Papatheocharous,Lefteris Angelis,Andreas S. Andreou
Issue Date:September 2012
pp. 367-375
One of the most significant problems faced by project managers is to effectively distribute the project resources and effort among the various project activities. Most importantly, project success depends on how well, or how balanced, the work effort is di...
Offshore Insourcing: A Case Study on Software Quality Alignment
Found in: Global Software Engineering, IEEE International Conference on
By Sebastian Barney,Claes Wohlin,Panagiota Chatzipetrou,Lefteris Angelis
Issue Date:August 2011
pp. 146-155
Background: Software quality issues are commonly reported when off shoring software development. Value-based software engineering addresses this by ensuring key stakeholders have a common understanding of quality. Aim: This work seeks to understand the lev...
Software Product Quality in Global Software Development: Finding Groups with Aligned Goals
Found in: Software Engineering and Advanced Applications, Euromicro Conference
By Panagiota Chatzipetrou,Lefteris Angelis,Sebastian Barney,Claes Wohlin
Issue Date:September 2011
pp. 435-442
The development of a software product in an organization involves various groups of stakeholders who may prioritize the qualities of the product differently. This paper presents an empirical study of 65 individuals in different roles and in different locat...
The Success Factors Powering Industry-Academia Collaboration
Found in: IEEE Software
By Claes Wohlin,Aybuke Aurum,Lefteris Angelis,Laura Phillips,Yvonne Dittrich,Tony Gorschek,Hakan Grahn,Kennet Henningsson,Simon Kågström,Graham Low,Per Rovegård,Piotr Tomaszewski,Christine van Toorn,Jeff Winter
Issue Date:March 2012
pp. 67-73
Collaboration between industry and academia supports improvement and innovation in industry and helps to ensure industrial relevance in academic research. This article presents an exploratory study of factors for successful collaboration between industry a...
Prioritization of Issues and Requirements by Cumulative Voting: A Compositional Data Analysis Framework
Found in: Software Engineering and Advanced Applications, Euromicro Conference
By Panagiota Chatzipetrou, Lefteris Angelis, Per Rovegârd, Claes Wohlin
Issue Date:September 2010
pp. 361-370
Cumulative Voting (CV), also known as Hundred-Point Method, is a simple and straightforward technique, used in various prioritization studies in software engineering. Multiple stakeholders (users, developers, consultants, marketing representatives or custo...
A large-scale empirical study of practitioners' use of object-oriented concepts
Found in: Software Engineering, International Conference on
By Tony Gorschek,Ewan Tempero,Lefteris Angelis
Issue Date:May 2010
pp. 115-124
We present the first results from a survey carried out over the second quarter of 2009 examining how theories in object-oriented design are understood and used by software developers. We collected 3785 responses from software developers world-wide, which w...
Comparing Software Cost Prediction Models by a Visualization Tool
Found in: Software Engineering and Advanced Applications, Euromicro Conference
By Nikolaos Mittas, Lefteris Angelis
Issue Date:September 2008
pp. 433-440
A crucial issue in the Software Cost Estimation area that has attracted the interest of software project managers is the selection of the best prediction method for estimating the cost of a project. Most of the prediction techniques estimate the cost from ...
An Empirical Study on Views of Importance of Change Impact Analysis Issues
Found in: IEEE Transactions on Software Engineering
By Per Rovegård, Lefteris Angelis, Claes Wohlin
Issue Date:July 2008
pp. 516-530
Change impact analysis is a change management activity that previously has been studied much from a technical perspective. For example, much work focuses on methods for determining the impact of a change. In this paper, we present results from a study on t...
Formal Evaluation of an Instructional ODL Tool
Found in: Advanced Learning Technologies, IEEE International Conference on
By Athanasis Karoulis, Ioannis Stamelos, Lefteris Angelis
Issue Date:July 2006
pp. 529-533
This paper presents the application and evaluation by means of a controlled experiment of an instructional tool during an Open and Distance Learning (ODL) course. The core issue of investigation is whether this instructional aid can support, guide and scaf...
Survival Analysis for the Duration of Software Projects
Found in: Software Metrics, IEEE International Symposium on
By Panagiotis Sentas, Lefteris Angelis
Issue Date:September 2005
pp. 5
In the area of software engineering various methods have been proposed in order to predict the cost of a software project in terms of the effort or of the productivity. An important feature which is closely related to the cost is the duration of a software...
Requirements and architecture design principles for a smart city experiment with sensor and social networks integration
Found in: Proceedings of the 17th Panhellenic Conference on Informatics (PCI '13)
By Athena Vakali, Christos Samaras, Despoina Chatzakou, Lefteris Angelis, Maria Giatsoglou
Issue Date:September 2013
pp. 327-334
Smart city infrastructures offer unique testbeds ground for innovative experimentation and services offering. Sensors networks in cities with integrated social networks activities can improve people-centric services, while improving infrastructures setting...
WIVSS: a new methodology for scoring information systems vulnerabilities
Found in: Proceedings of the 17th Panhellenic Conference on Informatics (PCI '13)
By Angeliki Sioziou, Georgios Spanos, Lefteris Angelis
Issue Date:September 2013
pp. 83-90
Vulnerabilities of information systems constitute an ever-increasing problem that IT security management must solve. As the number of vulnerabilities is growing exponentially, their ranking and prioritization is a crucial task for organizations and researc...
Alternative methods using similarities in software effort estimation
Found in: Proceedings of the 8th International Conference on Predictive Models in Software Engineering (PROMISE '12)
By Lefteris Angelis, Makrina Viola Kosti, Nikolaos Mittas
Issue Date:September 2012
pp. 59-68
A large variety of methods has been proposed in the literature about Software Cost Estimation, in order to increase accuracy when predicting the effort of developing new projects. Estimation by Analogy is one of the most studied techniques in this area the...
StatREC: a graphical user interface tool for visual hypothesis testing of cost prediction models
Found in: Proceedings of the 8th International Conference on Predictive Models in Software Engineering (PROMISE '12)
By Ioannis Mamalikidis, Lefteris Angelis, Nikolaos Mittas
Issue Date:September 2012
pp. 39-48
Background: During the previous decades there has been noted a significantly increased research interest on the construction of prediction models for accurate estimation of software cost. Despite the development of sophisticated methodologies, there is a c...
Modeling the relationship between software effort and size using deming regression
Found in: Proceedings of the 6th International Conference on Predictive Models in Software Engineering (PROMISE '10)
By Lefteris Angelis, Makrina Viola Kosti, Nikolaos Mittas, Vasiliki Argyropoulou
Issue Date:September 2010
pp. 1-10
Background: The relation between software effort and size has been modeled in literature as exponential, in the sense that the natural logarithm of effort is expressed as a linear function of the logarithm of size. The common approach to estimate the param...
Combining regression and estimation by analogy in a semi-parametric model for software cost estimation
Found in: Proceedings of the Second ACM-IEEE international symposium on Empirical software engineering and measurement (ESEM '08)
By Lefteris Angelis, Nikolaos Mittas
Issue Date:October 2008
pp. 1-87
Software Cost Estimation is the task of predicting the effort or productivity required to complete a software project. Two of the most known techniques appeared in literature so far are Regression Analysis and Estimation by Analogy. The results of the empi...
Towards individualized software engineering: empirical studies should collect psychometrics
Found in: Proceedings of the 2008 international workshop on Cooperative and human aspects of software engineering (CHASE '08)
By Lefteris Angelis, Maria Samuelsson, Richard Torkar, Robert Feldt
Issue Date:May 2008
pp. 49-52
Even though software is developed by humans, research in software engineering primarily focuses on the technologies, methods and processes they use while disregarding the importance of the humans themselves. In this paper we argue that most studies in soft...
Open source software development should strive for even greater code maintainability
Found in: Communications of the ACM
By Apostolos Oikonomou, Ioannis Samoladas, Ioannis Stamelos, Lefteris Angelis
Issue Date:October 2004
pp. 83-87
A study of almost six million lines of code tracks how freely accessible source code holds up against time and multiple iterations.