Browsing Computer Science by Author "(ORCID 0000-0002-2968-4763 & YÖK ID 23178) Sözer, Hasan"
Now showing items 21-40 of 74
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Dynamic filtering and prioritization of static code analysis alerts
Yüksel, U.; Sözer, Hasan (IEEE, 2021)We propose an approach for filtering and prioritizing static code analysis alerts while these alerts are being reviewed by the developer. We construct a Prolog knowledge base that captures the data flow information in the ... -
Effort estimation for architectural refactoring of data tier software
Ersoy, E.; Sözer, Hasan (IEEE, 2022)Architectural refactoring requires substantial effort. We introduce an approach and a tool to predict this effort prior to refactoring. We focus on PL/SQL programs that are developed as data access tiers of business software. ... -
Effort estimation for architectural refactoring to introduce module isolation
Öztürk, F.; Sarılı, E.; Sözer, Hasan; Aktemur, Tankut Barış (Springer, 2014)The decomposition of software architecture into modular units is driven by both functional and quality concerns. Dependability and security are among quality concerns that require a software to be decomposed into separate ... -
Evaluating software architecture erosion for PL/SQL programs
Altınışık, M.; Ersoy, E.; Sözer, Hasan (The ACM Digital Library, 2017)PL/SQL procedures are grouped into packages for providing modularity. These procedures are indirectly coupled due to their use of common database tables. We define a cohesion metric and cluster PL/SQL procedures based on ... -
Evaluating the effectiveness of multi-level greedy modularity clustering for software architecture recovery
Sözer, Hasan (Springer Nature, 2019)Software architecture recovery approaches mainly analyze various types of dependencies among software modules to group them and reason about the high-level structural decomposition of a system. These approaches employ a ... -
Evaluation of distributed machine learning algorithms for anomaly detection from large-scale system logs: a case study
Astekin, M.; Zengin, H.; Sözer, Hasan (IEEE, 2018)Anomaly detection is a valuable feature for detecting and diagnosing faults in large-scale, distributed systems. These systems usually provide tens of millions of lines of logs that can be exploited for this purpose. ... -
Extending static code analysis with application-specific rules by analyzing runtime execution traces
Ersoy, E.; Sözer, Hasan (Springer International Publishing, 2016)Static analysis tools cannot detect violations of application-specific rules. They can be extended with specialized checkers that implement the verification of these rules. However, such rules are usually not documented ... -
FAS: introducing a service for avoiding faults in composite services
Gülcü, K.; Sözer, Hasan; Aktemur, Tankut Barış (Springer Science+Business Media, 2012)In service-oriented architectures, composite services depend on a set of partner services to perform the required tasks. These partner services may become unavailable due to system and/or network faults, leading to an ... -
Fault masking as a service
Gülcü, Koray; Sözer, Hasan; Aktemur, Tankut Barış; Ercan, Ali Özer (Wiley, 2014-07)In SOA, composite services depend on a set of partner services to perform their tasks. These partner services may become unavailable because of system and/or network faults, leading to an increased error rate for the ... -
Feature-based rationale management system for supporting software architecture adaptation
Tekinerdoğan, B.; Sözer, Hasan; Akşit, M. (World Scientific Publishing Co., 2012-11)Each software architecture design is the result of a broad set of design decisions and their justifications, that is, the design rationale. Capturing the design rationale is important for a variety of reasons such as ... -
FORMAT: a tool for adapting test models based on feature models
Ergun, B.; Gebizli, C. Ş.; Sözer, Hasan (IEEE, 2017)We introduce a tool that facilitates the reuse of test models for a family of systems. Test models are defined as hierarchical Markov chains for specifying possible usage of features for these systems. Variability among ... -
Geçmişe dönük hata tespit oranlarının zamanla değişen etkisine göre regresyon testlerinin önceliklendirilmesi
Kurt, D.; Sözer, Hasan (CEUR-WS, 2014)Büyük ölçekli yazılım sistemlerinin regresyon testleri masraflıdır. Kaynak kısıtları sebebiyle genellikle tüm test durumlarını değerlendirmek mümkün olmamaktadır. Dolayısıyla, hataları mümkün olan en kısa sürede tespit ... -
Generating runtime verification specifications based on static code analysis alerts
Kılıç, Yunus; Sözer, Hasan (ACM, 2017)Runtime verification techniques verify dynamic system behavior with respect to a set of specifications. These specifications are often created manually based on system requirements and constraints. In this paper, we introduce ... -
Genetic algorithms and heuristics hybridized for software architecture recovery
Elyasi, Milad; Simitcioğlu, Muhammed Esad; Saydemir, Abdullah; Ekici, Ali; Özener, Okan Örsan; Sözer, Hasan (Springer, 2023-06-26)Large scale software systems must be decomposed into modular units to reduce maintenance efforts. Software Architecture Recovery (SAR) approaches have been introduced to analyze dependencies among software modules and ... -
Guiding architects in selecting architectural evolution alternatives
Ciraci, S.; Sözer, Hasan; Aksit, M. (Springer Science+Business Media, 2011)Although there exist methods and tools to support architecture evolution, the derivation and evaluation of alternative evolution paths are realized manually. In this paper, we introduce an approach, where architecture ... -
Identifying critical architectural components with spectral analysis of fault trees
Ayav, T.; Sözer, Hasan (Elsevier, 2016-12)We increasingly rely on software-intensive embedded systems. Increasing size and complexity of these hardware/software systems makes it necessary to evaluate reliability at the system architecture level. One aspect of this ... -
Impact of education and experience level on the effectiveness of exploratory testing: an industrial case study
Şahin Gebizli, Ceren; Sözer, Hasan (IEEE, 2017)Exploratory Testing (ET) is a widely applied approach in practice. This approach relies on the knowledge and experience of test engineers and technicians who perform ET. Hence, we aimed at evaluating the impact of education ... -
Improving models for model-based testing based on exploratory testing
Gebizli, C. Ş.; Sözer, Hasan (IEEE, 2014)Model-based testing facilitates automatic generation of test cases by means of models of the system under test. Correctness and completeness of these models determine the effectiveness of the generated test cases. Critical ... -
Increasing test efficiency by risk-driven model-based testing
Gebizli, C. Ş.; Kırkıcı, A.; Sözer, Hasan (Elsevier, 2018-10)We introduce an approach and a tool, RIMA, for adapting test models used for model-based testing to augment information regarding failure risk. We represent test models in the form of Markov chains. These models comprise ... -
Incremental analysis of large-scale system logs for anomaly detection
Astekin, M.; Özcan, S.; Sözer, Hasan (IEEE, 2019)Anomalies during system execution can be detected by automated analysis of logs generated by the system. However, large scale systems can generate tens of millions of lines of logs within days. Centralized implementations ...
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