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Yayın Compression of medical images with HEVC intra prediction coding [Tibbi Göröntölerin HEVC Göröntö-İçi Tahmin Kodlama Ile Sikiştirilmasinin İncelenmesi](Institute of Electrical and Electronics Engineers Inc., 2017) Akman A.; Cekli S.HEVC which is the new image coding standard provides higher compression performance over the existing standards. In this study, compression of medical images is fulfilled with HEVC intra prediction method. The compressed images for storage or transmission purposes should not lose their required characteristics for the diagnosis after the recovery process. The recovered compressed images are evaluated by using the objective criteria of PSNR values. The experimental results are provided in the study. © 2017 IEEE.Yayın Developing a new excitation system for the microwave heating cavities(Department of Chemistry and Technology of Polymers, Cracow University of Technology, 2015) Oktay A.; Akman A.…Yayın Effect of the load ports in industrial microwave ovens(Edinburgh University Press, 2013) Oktay A.; Akman A.In this article, a structure formed by a rectangular applicator is under study. The applicator is partially loaded by a dielectric material in rectangular form. In order to simulate the applicator which is considering it as an element of the tunnel, two load-opening (entry and exit of load) have been cutted on the side walls of the applicator so that the dielectric load fills it and travels from the entry to the exit opening(load ports). The electric field distribution on the load and the reflection coefficient at the port are calculated to obtain effects of the load openings.Yayın Effect of the load-openings on the industrial microwave applicators(Forschungszentrum Karlsruhe, 2009) Oktay A.; Yenikaya S.; Akman A.The time domain finite element method has been used to simulate the electromagnetic field distribution and dissipated power density inside the cavity(applicator) containing partially a dielectric material located transversally between two side-opening (load ports). The field distribution and the power density has been simulated with and without the load-openings(load ports) in order to demostrate its effects on the microwave heating processes.Yayın An efficient SPIHT algorithm and system architecture for image compression [Görüntü Sikiştirrma için Verimli Bir SPIHT Algoritmasi ve Sistem Mimarisi](Institute of Electrical and Electronics Engineers Inc., 2017) Cekli S.; Akman A.In this study, an efficient modified SPIHT algorithm and related architecture design is proposed for image compression. The proposed architecture is designed as a three stage pipeline structure. Different sized images are compressed using the designed architecture for different bpp values. The computed PSNR values of the compressed images using the proposed algorithm and also the original algorithm is compared in order to test the performance of the proposed algorithm and architecture. © 2017 IEEE.Yayın Image compression performance of hevc intra prediction with different transform coefficient coding methods [Dönüsüm Katsayi Kodlama Yöntemlerinin HEVC Görüntü-içi Tahmin ile Görüntü Sikistirma Performansina Etkilerinin Incelenmesi](Institute of Electrical and Electronics Engineers Inc., 2018) Cekli S.; Akman A.HEVC is the new coding standard providing higher compression ratios with comparated to the other existent coding standards. In this study, the image compression performance using intra prediction is examined. Especially, the coding of transformation of prediction errors are handled and three different coding structure is proposed. The compression code efficiency is obtained for different block sizes and image sizes by depending on the transform coding formats. The original images are recovered by decoding codes of the compressed images, and the similarity with the original images is inspected by consideirng the PSNR values. © 2018 IEEE.Yayın Management of Low Powered Personal Area Networks Using Compression in SNMPv3(IEEE Computer Society, 2019) Turk Y.; Akman A.The internet of things (IoT) is being used more and more in our lives and this area attracts interest in studying new methods. One of these methods is mesh networking technique, which is increasingly becoming more popular and is suitable for use in places where wired connectivity is unavailable. Researchers are mostly focused on developing new and efficient services for systems running on this method, but the management of devices on mesh networks remains as an important issue. The management of an increasing number of devices can become inexhaustible. IoT management is to monitor and take action on the communication from and between connected devices and also control the devices from a remote server. This is similar to traditional network management when mesh network devices are considered. There is also a critical precaution for objects which is to complete administrative operations securely. In this article we have adapted a protocol, that is mainly used in traditional network management, for using in the management low powered personal area network (LoWPAN). We made some experimental analysis and compared our approach with other well-known IoT protocols for device management perspective. © 2018 IEEE.Yayın Yayın Numerical analysis of microwave multimode oven with two lateral apertures(Editions Cepadues, 2011) Oktay A.; Gözkaya B.A.; Akman A.In this article, a structure formed with a rectangular applicator is under study. The applicator is partially loaded by a dielectric material between two apertures (entry and exit load port) on the side walls of the applicator. The applicator is simulated using the finite element method (FEM) in order to find the effects of the apertures (load ports) on the uniformity and the efficiency in multimode microwave oven.
