Tuğlular, Tuğkan
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Name Variants
Tuğkan Tuğlular
Tuǧlular, T.
Tuglular, Tugkan
Tuglular, T.
Tuğlular, Tuğkan
Tuglular, Tugkan
Tuǧlular, T.
Tuglular, Tugkan
Tuglular, T.
Tuğlular, Tuğkan
Tuglular, Tugkan
Job Title
Assoc. Prof. Dr.
Email Address
tugkantuglular@iyte.edu.tr
Main Affiliation
Bilgisayar Mühendisliği Bölümü
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Scholarly Output
110
Articles
19
Citation Count
0
Supervised Theses
34
108 results
Scholarly Output Search Results
Now showing 1 - 10 of 108
Article A Domain-Specific Language for the Document-Based Model-Driven Engineering of Business Applications(Ieee-inst Electrical Electronics Engineers inc, 2022) Leblebici, Onur; Kardas, Geylani; Tuglular, Tugkan; Tuğlular, Tuğkan; Bilgisayar Mühendisliği Bölümü; Bilgisayar Mühendisliği BölümüTo facilitate the development of business applications, a domain-specific language (DSL), called DARC, is introduced in this paper. Business documents including the descriptions of the responsibilities, authorizations, and collaborations, are used as the first-class entities during model-driven engineering (MDE) with DARC. Hence the implementation of the business applications can be automatically achieved from the corresponding document models. The evaluation of using DARC DSL for the development of commercial business software was performed in an international sales, logistics, and service solution provider company. The results showed that the code for all business documents and more than 50% of the responsibility descriptions composing the business applications could be generated automatically by modeling with DARC. Finally, according to the users' feedback, the assessment clearly revealed the adoption of DARC features in terms of the DSL quality characteristics, namely functional suitability, usability, reliability, maintainability, productivity, extensibility, compatibility, and expressiveness.Master Thesis Development of a web services security archhitecture based on .net framework(Izmir Institute of Technology, 2008) Bacı, Recep; Tuğlular, Tuğkan; Tuğlular, TuğkanService Oriented Architecture (SOA) is an architectural style which allows interaction of diverse applications regardless of their platform, implementation languages and locations by utilizing generic and reliable services that can be used as application building block. SOA includes methodologies and strategies to follow in order to develop sophisticated applications and information systems. SOA is different from the traditional architectures as it has its own unique architectural characteristics and regulations, which needs to be analyzed and clarified so as to apply the information that should be included in the architectural model of SOA correctly to service based application development. The newest technology for SOA is web service technology which gains more and more importance as a technology to develop distributed serviceoriented applications. Web services are an emergent paradigm for implementing business collaborations over the web. Each service has an interface that is accessible through standard protocols and that describes the interaction capabilities of the service.This master's thesis primarily examines the web services concept of the .NET platform having the emphasis on secure communication. A case study demonstrates securing the communication between a web service and its clients through RIJNDAEL, 3DES and RSA algorithms implemented on code based structure which uses the identity token, provided from identity web service, to validate the identity of the client and the status token provided from status web service in order to validate the status of the client.A number of tests are performed using different cryptographic algorithms and network settings for the communication in order to obtain operational values of these algorithms.Conference Object Event Sequence Graph-based Feature-oriented Testing: A Preliminary Study(Ieee, 2018) Tuglular, Tugkan; Tuğlular, Tuğkan; Bilgisayar Mühendisliği BölümüThis paper proposes a model-based approach for feature-oriented testing using event sequence graphs (ESGs). ESGs are used to generate test cases automatically for positive and negative testing. To fit ESG models to feature-oriented testing, two new improvements on ESGs are proposed. The first improvement is on repetitive use of refinement ESG and the second improvement is saving state in an ESG and passing it to the following ESG. This is a work towards communicating hierarchical ESGs. The preliminary results demonstrate the feasibility of the proposed approach. The proposed approach improves testability of features.Master Thesis Policy anomaly reporting for distributed firewalls(Izmir Institute of Technology, 2007) Çetin, Füsun; Tuğlular, Tuğkan; Tuğlular, TuğkanFirewall is a protective device which is installed between two networks.Firewall functionality depends on the filtering rules and their order. All rule relations must be considered in order to determine correct rule order. In this thesis, anomaly discovery algorithms are implemented for single and distributed firewall environments in a software tool called .Policy Anomaly Checker.. A number of tests are performed using different policies and network topologies in order to obtain operational values of these algorithms.Master Thesis Tag-based dynamic ranking system for organization related news(Izmir Institute of Technology, 2018-05) Özkan, Mustafa Tunahan; Tuğlular, Tuğkan; Tuğlular, TuğkanIn information systems, tags are keywords or terms, which represent a piece of information. They provide to define an item and help it to be found again through searching or browsing. Tags have gained popularity due to the growth of social sharing, social bookmarking, organization network and social network websites. In addition, tags are also used to express prominent events and noticeable topics in the news. In this thesis, we propose a tag-based statistical learning approach to predict the shareability of news in an organization network. We represented features with tags by using different methods and adopted several classifiers to predict the shareability of news. We model this problem with a binary classification problem, where shareable news are considered as the positive and non-shareable news are considered as the negative class. The experimental results indicate that there is no general best classifier for the study of shareability prediction for organization related news but depending on the dataset and represented features we can adopt an optimal classifier.Master Thesis Application of graph neural networks on software modeling(01. Izmir Institute of Technology, 2020-12) Leblebici, Onur Yusuf; Tuğlular, Tuğkan; Tuğlular, Tuğkan; Belli, FevziDeficiencies and inconsistencies introduced during the modeling of software systems can cause undesirable consequences that may result in high costs and negatively affect the quality of all developments made using these models. Therefore, creating better models will help the software engineers to build better software systems that meet expectations. One of the software modelling methods used for analysis of graphical user interfaces is Event Sequence Graphs (ESG). The goal of this thesis is to propose a method that predicts missing or forgotten links between events defined in an ESG via Graph Neural Networks (GNN). A five-step process consisting of the following steps is proposed: (i) data collection from ESG model, (ii) dataset transformation, (iii) GNN model training, (iv) validation of trained model and (v) testing the model on unseen data. Three performance metrics, namely cross entropy loss, area under curve and accuracy, were used to measure the performance of the GNN models. Examining the results of the experiments performed on different datasets and different variations of GNN, shows that even with relatively small datasets prepared from ESG models, predicts missing or forgotten links between events defined in an ESG can be achieved.Master Thesis Mutation analysis of specification-based contracts in software testing [Master Thesis](01. Izmir Institute of Technology, 2021-07) Khalilov, Abbas; Tuğlular, Tuğkan; Tuğlular, Tuğkan; Belli, FevziSoftware used in fields such as medicine, finance, aviation and aerospace, nuclear power etc. is required to be reliable. Any software failures in these fields may have catastrophic consequences such as human and financial losses, which may cause a great damage to the economy and to social well-being. Hence, before launching, software should be rigorously tested. Testing can uncover the conditions, which software cannot handle. Those conditions might be overlooked during development. So, software testing points to the faults in the software under development to be patched. The important element of software testing is the use of the adequate test cases. If the outcome of the test case is positive, that means testing did not reveal any fault, then this test case might be considered as inefficient and useless for the tested version of software. Therefore, it is important to check test cases on adequacy, which can be achieved by mutation analysis. This thesis focuses on checking the adequacy of the test cases for Decision-Table-augmented Event Sequence Graphs (ESG-DTs) representation of a system under test by using mutation analysis. Test cases are represented in the Complete Event Sequence (CES) and Faulty CES (FCES) forms. This thesis presents a new set of mutation operators for mutation of contracts represented in Multi-Terminal Binary Decision Diagram (MTBDD). This thesis introduces a new approach for mutation of the ESG-DT model by using the proposed MTBDD mutation operators. The proposed approach is evaluated on three cases. The results for all cases show the drawback of specific FCES test sequences and the relationship between the mutant detection by CES/FCES sequences and proposed mutation operators.Conference Object Monitoring of policy operations in a distributed firewall environment(2008) Caki, O.; Tuglular, T.; Cetin, F.; Tuğlular, Tuğkan; Bilgisayar Mühendisliği BölümüDistributed firewalls concept has been introduced to overcome some drawbacks of traditional firewalls. Distributed firewall approach is based on the idea of enforcing policy rules at the intermediate and end points rather than a single entry point to the network. Management of policy rules in a distributed firewall environment requires surveillance of policy operations performed on each firewall. With this paper, we propose a monitoring architecture and its application prototype for distributed firewalls to keep track of actions, such as create, read, update, and delete, carried out on policy rule sets. We performed some emulation and laboratory experiments to obtain operational values of the proposed architecture. ©2008 by Boǧaziçi University.Conference Object Model Based Testing of VHDL Programs(Ieee, 2015) Ayav, Tolga; Tuglular, Tugkan; Belli, Fevzi; Tuğlular, Tuğkan; Ayav, Tolga; Bilgisayar Mühendisliği BölümüVHDL programs are often validated by means of test benches constructed from formal system specification. To include real-time properties of VHDL programs, the proposed approach first transforms them to concurrently running network of timed automata and then performs model checking on properties taken from the specification. Counterexamples generated by the model checker are used to form a test bench. The approach is validated by a case study composed of a nontrivial application running on a microprocessor. As presented, the approach enables testing both hardware and software at once.Conference Object Validation of feature-oriented product configurations using event sequence graphs(CEUR-WS, 2018) Tuğlular, T.; Belli, F.; Öztürk, D.; Tuğlular, TuğkanThis study attempts to suggest an approach to systematically test potentially very large number of product variants in feature-oriented software. Feature-oriented software forms a popular concept to efficiently realize software reuse. Developing feature-oriented software is well accepted to accomplish software reuse in an efficient way. Developing product variants by exploiting software reuse requires verification of these variants by exploiting test reuse. However, the reuse of tests in the verification of variants is an underworked topic. In this study, we propose a model-based approach to top-down testing of feature-oriented software that does not have dependency or conflict between features. In the case study, event sequence graphs (ESGs) are used to model the software under consideration and then to generate test cases for positive and negative testing. The generated tests are executed via SahiPro web test automation tool, of which scripts are also automatically generated from ESGs.
