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Item The configurational effects of task-technology fit, technology-induced engagement and motivation on learning performance during Covid-19 pandemic: An fsQCA approach(Springer, 2021) Elçi, Alev; Abubakar, A. MohammedAt the onset of 2020, Covid-19 pandemic began and disrupted teaching and learning activities with substantial implications for resources and operations. Against this backdrop, the configural causal effects of task-technology fit, technology-induced engagement and motivation, gender, and residential location on learning performance are examined. The proposed association was tested with a dyad sample of faculty members and students (n = 16) using fuzzy sets (fsQCA) analysis. Results show that (i) task-technology fit, and technology-induced motivation emerge as necessary conditions for high learning performance; (ii) task-technology fit, technology-induced engagement and motivation are sufficient conditions for high learning performance among female students, (iii) task-technology fit, technology-induced engagement and motivation are sufficient conditions for high learning performance among students living in urban areas and (iv) task-technology fit is a sufficient condition for high learning performance among female students living in rural areas irrespective of technology-induced engagement and motivation. Implications for theory and policy prescriptions are offered for practitionersItem A survey on semanticized and personalized health recommender systems(Blackwell Publishing Ltd, 2020) Çelik Ertuğrul, Duygu; Elçi, AtillaHealth 3.0 is a health-related extension of the Web 3.0 concept. It is based on the semantic Web which provides for semantically organizing electronic health records of individuals. Health 3.0 is rapidly gaining ground as a new research topic in many academic and industrial disciplines. Due to the recent rapid spread of wearable sensors and smart devices with access to social media, migrating health services from the traditional centre-based health system to personal health care is inevitable. In this current era of greater personalization, treating patients' health problems according to their profile and medical data gathered is possible using the latest information technologies. Consequently, personalized health recommender systems have gained importance. Empowering the utility of advanced Web technology in personalized health systems is still challenging due to pressing issues, such as lack of low cost and accurate smart medical sensors and wearable devices, existing investment in legacy Web system architecture in health sector, heterogeneity of medical data gathered by myriad health care institutions and isolated health services, and interoperability issues as well as multi-dimensionality of medical data. By tracing recent developments, this paper offers a systematic review through recent research on semantic Web-enabled personalized health systems, namely, semanticized personalized health recommender systems with the key enabling technologies, major applications, and successful case studies. Critical questions derived from the research studies were discussed, and main directions of open issues were identified leading to recommendations for future study in the field of personalized health recommender systems.Item Editorial: special issue on "resilient networks: modeling, design, and applications"(KeAi Publishing, 2018) Elçi, Atilla; Bakshi, Sambit; Sahoo, Manmath N.[Abstract Not Available]Item Special issue on security of information and networks(Elsevıer Scıence Bv, 2015) Elçi, Atilla; Örgün, Mehmet A.; Chefranov, Alexander; Gaur, Manoj Singh[Abstract Not Available]Item Special issue on "trustworthy software systems for the digital society"(ELSEVIER SCIENCE INC, 2014) Bai, Xiaoying; Elçi, Atilla; Zulkernine, Mohammad[Abstract Not Available]Item Special issue on trust and security in wireless sensor networks(WILEY, 2015) Örgün, Mehmet Ali; Elçi, Atilla; Pieprzyk, Josef; Chefranov, Alexander; Shankaran, Rajan; Wang, Huaxiong[Abstract Not Available]Item Semantic composition of business processes using Armstrong's Axioms(Cambridge University Press, 2014) Çelik, Duygu; Elçi, AtillaLack of sufficient semantic description in the content of Web services makes it difficult to find and compose suitable Web services during analysis, search, and matching processes. Semantic Web Services are Web services that have been enhanced with formal semantic description, which provides well-defined meaning. Due to insertion of semantics, meeting user demands will be made possible through logical deductions achieving resolutions automatically. We have developed an inference-based semantic business process composition agent (SCA) that employs inference techniques. The semantic composition agent system is responsible for the synthesis of new services from existing ones in a semi-automatic fashion. SCA System composes available Web Ontology Language for Web services atomic processes utilizing Revised Armstrong's Axioms (RAAs) in inferring functional dependencies. RAAs are embedded in the knowledge base ontologies of SCA System. Experiments show that the proposed SCA System produces process sequences as a composition plan that satisfies user's requirement for a complex task. The novelty of the SCA System is that for the first time Armstrong's Axioms are revised and used for semantic-based planning and inferencing of Web services.Item Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics): Preface(2013) Zu, Qiaohong; Hu, Bo; Elçi, Atilla[No abstract available]Item Formal verification of finite state transactional security policy(Springer Verlag, 2014) Rajamanickam, N.; Nadarajan, Rethinaswamy; Elçi, AtillaSecurity policy helps to ensure that system always takes the desired input action sequence and works in a proper manner. Formal verification of finite state transactional security policy is necessary to check whether the given policy conforms to the specification. One way to specify finite state transactional security policy is by using a filter automaton. A filter automaton is an action sequence transformer that maps an input action sequence into another, so that the output action sequence obeys the specified policy. A method for verification of finite state transactional security policy enforced by filter automata is being proposed. The observable actions finite security automaton and the observable actions finite truncation automaton are used to verify a finite state transactional security policy. © Springer International Publishing Switzerland 2014.Item Message from the ESAS 2015 workshop organizers(IEEE Computer Society, 2015) Elçi, Atilla; Çelik, Duygu[No abstract available]Item Message from ESAS 2016 Workshop Organizers(IEEE Computer Society, 2016) Elçi, Atilla; Çelik Ertuğrul, Duygu[No abstract available]Item Message from the workshop organizers: ESAS 2013(2013) Çelik, Duygu; Elçi, Atilla; Orgun, Mehmet A.; Rahnama, Behnam; Unland, Rainer[No abstract available]Item Special issue on the design and engineering of cryptographic solutions for secure information systems(WILEY-BLACKWELL, 2014) Elçi, Atilla; Pieprzyk, Josef; Örgün, Mehmet Ali; Chefranov, Alexander[Abstract Not Available]Item Message from chair(2012) Gaur, Manoj Singh; Elçi, Atilla; Makarevich, Oleg B.; Orgun, Mehmet A.; Singh, Virendra K.; Laxmi, Vijay; Babenko, Liudmila; Pieprzyk, Josef P.[No abstract available]Item The 9th IEEE International Workshop on Engineering Semantic Agents - Semantics, Agents and Intelligence (ESAS 2014)(Institute of Electrical and Electronics Engineers Inc., 2014) Elçi, Atilla; Çelik, Duygu; Orgun, Mehmet Ali; Rahnama, Behram; Unland, Rainer[No abstract available]Item DC-informative subcarrier intensity modulation for visible light communication(IEEE, 2017) Çelik, Yasin; Akan, AydinIn this paper, the performance of direct current informative subcarrier intensity modulation (DCI-SIM) which is proposed to enhance the power efficiency of subcarrier intensity modulation (SIM) is investigated in visible light communication. The BER performance of DCI-SIM is compared with SIM, pulse amplitude modulation (PAM) and, enhanced unipolar orthogonal frequency division multiplexing (eU-OFDM) for different spectral efficiencies. Using analytical derivations and simulation results, we show that the DCI-SIM is the most power efficient modulation technique among others, and that the power efficiency increases with the spectral efficiency. Furthermore, we optimize the constellation of 64-DCI-SIM and present the results.
