2013
Khanfir, H; Ruyet, DL; Özbek, B Reduced feedback load using user selection algorithms for the multiuser multi‐input single‐output systems Journal Article Transactions on Emerging Telecommunications Technologies 24 (7-8), pp. 809–819, 2013. @article{pop00064bb, title = {Reduced feedback load using user selection algorithms for the multiuser multi‐input single‐output systems}, author = {H Khanfir and DL Ruyet and B Özbek}, year = {2013}, date = {2013-01-01}, journal = {Transactions on Emerging Telecommunications Technologies 24 (7-8)}, pages = {809--819}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Güneş, MD Development of process techniques for composite based leaf spring systems Journal Article İzmir Institute of Technology, 2013. @article{pop00044bb, title = {Development of process techniques for composite based leaf spring systems}, author = {MD Güneş}, year = {2013}, date = {2013-01-01}, journal = {İzmir Institute of Technology}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Altınkaya, MA Alpha-trimmed means of multiple location estimates Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00016c, title = {Alpha-trimmed means of multiple location estimates}, author = {MA Altınkaya}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Karakuş, O; Altınkaya, MA; Kılıçaslan, K The effect of convolutional encoder memory on the sphere decoding search radius in MIMO systems Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00023d, title = {The effect of convolutional encoder memory on the sphere decoding search radius in MIMO systems}, author = {O Karakuş and MA Altınkaya and K Kılıçaslan}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Efeler, MC; Altınkaya, MA; Gümüştekin, Ş A Bayesian approach for licence plate recognition developed on a realistic simulation environment Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00024d, title = {A Bayesian approach for licence plate recognition developed on a realistic simulation environment}, author = {MC Efeler and MA Altınkaya and Ş Gümüştekin}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Doǧan, Tunca; Karacali, Bilge Automatic Identification of Highly Conserved Family Regions and Relationships in Genome Wide Datasets Including Remote Protein Sequences Journal Article PLoS ONE, 2013, ISSN: 19326203. @article{Dogan2013, title = {Automatic Identification of Highly Conserved Family Regions and Relationships in Genome Wide Datasets Including Remote Protein Sequences}, author = {Tunca Doǧan and Bilge Karacali}, doi = {10.1371/journal.pone.0075458}, issn = {19326203}, year = {2013}, date = {2013-01-01}, journal = {PLoS ONE}, abstract = {Identifying shared sequence segments along amino acid sequences generally requires a collection of closely related proteins, most often curated manually from the sequence datasets to suit the purpose at hand. Currently developed statistical methods are strained, however, when the collection contains remote sequences with poor alignment to the rest, or sequences containing multiple domains. In this paper, we propose a completely unsupervised and automated method to identify the shared sequence segments observed in a diverse collection of protein sequences including those present in a smaller fraction of the sequences in the collection, using a combination of sequence alignment, residue conservation scoring and graph-theoretical approaches. Since shared sequence fragments often imply conserved functional or structural attributes, the method produces a table of associations between the sequences and the identified conserved regions that can reveal previously unknown protein families as well as new members to existing ones. We evaluated the biological relevance of the method by clustering the proteins in gold standard datasets and assessing the clustering performance in comparison with previous methods from the literature. We have then applied the proposed method to a genome wide dataset of 17793 human proteins and generated a global association map to each of the 4753 identified conserved regions. Investigations on the major conserved regions revealed that they corresponded strongly to annotated structural domains. This suggests that the method can be useful in predicting novel domains on protein sequences.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Identifying shared sequence segments along amino acid sequences generally requires a collection of closely related proteins, most often curated manually from the sequence datasets to suit the purpose at hand. Currently developed statistical methods are strained, however, when the collection contains remote sequences with poor alignment to the rest, or sequences containing multiple domains. In this paper, we propose a completely unsupervised and automated method to identify the shared sequence segments observed in a diverse collection of protein sequences including those present in a smaller fraction of the sequences in the collection, using a combination of sequence alignment, residue conservation scoring and graph-theoretical approaches. Since shared sequence fragments often imply conserved functional or structural attributes, the method produces a table of associations between the sequences and the identified conserved regions that can reveal previously unknown protein families as well as new members to existing ones. We evaluated the biological relevance of the method by clustering the proteins in gold standard datasets and assessing the clustering performance in comparison with previous methods from the literature. We have then applied the proposed method to a genome wide dataset of 17793 human proteins and generated a global association map to each of the 4753 identified conserved regions. Investigations on the major conserved regions revealed that they corresponded strongly to annotated structural domains. This suggests that the method can be useful in predicting novel domains on protein sequences. |
Ahsan, Syed Saad; Gumus, Abdurrahman; Erickson, David Redox mediated photocatalytic water-splitting in optofluidic microreactors Journal Article Lab on a Chip, 2013, ISSN: 14730189. @article{Ahsan2013, title = {Redox mediated photocatalytic water-splitting in optofluidic microreactors}, author = {Syed Saad Ahsan and Abdurrahman Gumus and David Erickson}, doi = {10.1039/c2lc41129f}, issn = {14730189}, year = {2013}, date = {2013-01-01}, journal = {Lab on a Chip}, abstract = {While photocatalytic water-splitting is a promising alternative energy source, low photocatalytic efficiencies in the visible spectrum hinders its widespread deployment and commercialization. Although screening combinations of new materials and characterizing their reaction kinetics offers possible improvements to efficiency, current experiments are challenged by expensive bulky setups and slow recovery of particles downstream. Optofluidics is a good platform for screening Z-scheme catalysts cheaply and rapidly. By alleviating the problems of mass transport it can also potentially increase reaction rates and efficiencies. Here, we demonstrate a novel optofluidic device based on applying catalyst sol-gels on planar channels while measuring the reaction output by monitoring the depletion of the redox mediators. We use our setup to study the kinetics of the TiO 2 -Pt water-splitting reaction mediated by I - /IO 3 - redox pairs under different flow rates. In particular, for TiO 2 -Pt, we show ∼2-fold improvements in reaction rates and efficiencies. textcopyright The Royal Society of Chemistry 2013.}, keywords = {}, pubstate = {published}, tppubtype = {article} } While photocatalytic water-splitting is a promising alternative energy source, low photocatalytic efficiencies in the visible spectrum hinders its widespread deployment and commercialization. Although screening combinations of new materials and characterizing their reaction kinetics offers possible improvements to efficiency, current experiments are challenged by expensive bulky setups and slow recovery of particles downstream. Optofluidics is a good platform for screening Z-scheme catalysts cheaply and rapidly. By alleviating the problems of mass transport it can also potentially increase reaction rates and efficiencies. Here, we demonstrate a novel optofluidic device based on applying catalyst sol-gels on planar channels while measuring the reaction output by monitoring the depletion of the redox mediators. We use our setup to study the kinetics of the TiO 2 -Pt water-splitting reaction mediated by I - /IO 3 - redox pairs under different flow rates. In particular, for TiO 2 -Pt, we show ∼2-fold improvements in reaction rates and efficiencies. textcopyright The Royal Society of Chemistry 2013. |
Unlu, Mehtat; Cetinayak, Hasan Oguz; Onder, Devrim; Ecevit, Cenk; Akman, Fadime; Ikiz, Ahmet Omer; Ada, Emel; Karacali, Bilge; Sarioglu, Sulen The prognostic value of tumor-stroma proportion in laryngeal squamous cell carcinoma Journal Article Turkish Journal of Pathology, 2013, ISSN: 1018-5615. @article{Unlu2013, title = {The prognostic value of tumor-stroma proportion in laryngeal squamous cell carcinoma}, author = {Mehtat Unlu and Hasan Oguz Cetinayak and Devrim Onder and Cenk Ecevit and Fadime Akman and Ahmet Omer Ikiz and Emel Ada and Bilge Karacali and Sulen Sarioglu}, doi = {10.5146/tjpath.2013.01144}, issn = {1018-5615}, year = {2013}, date = {2013-01-01}, journal = {Turkish Journal of Pathology}, abstract = {OBJECTIVE: Tumor-stroma proportion of tumor has been presented as a prognostic factor in some types of adenocarcinomas, but there is no information about squamous cell carcinomas and laryngeal carcinomas.$backslash$n$backslash$nMATERIAL AND METHOD: Five digital images of the tumor sections were obtained from 85 laryngeal carcinomas. Proportion of epithelial tumor component and stroma were measured by a software tool, allowing the pathologists to mark 205.6 $mu$m2 blocks on areas as carcinomatous/stromal, by clicking at the image. Totally, 3.451 mm2 tumor areas have been marked to 16.785 small square blocks for each case.$backslash$n$backslash$nRESULTS: Median follow up was 48 months (range 3-194). The mean tumor-stroma proportion was 48.63+18.18. There was no difference for tumor-stroma proportion when tumor location, grade, stage and perinodal invasion were considered. Although the following results were statistically insignificant, the mean tumor-stroma proportion was the lowest (37.46±12.49) for subglottic carcinomas, and it was 52.41±37.47, 50.86+19.84 and 44.56±16.91 for supraglottic, transglottic and glottic cases. The tumor-stroma proportion was lowest in cases with perinodal invasion and the highest in cases without lymph node metastasis (44.72±20.23, 47.77±17.37, 50.05±17.34). Tumor-stroma proportion was higher in the basaloid subtype compared with the classical squamous cell carcinoma (53.76±14.70 and 48.63±18.38 respectively). The overall and disease-free survival analysis did not reveal significance for tumor-stroma proportion (p=0.08}, keywords = {}, pubstate = {published}, tppubtype = {article} } OBJECTIVE: Tumor-stroma proportion of tumor has been presented as a prognostic factor in some types of adenocarcinomas, but there is no information about squamous cell carcinomas and laryngeal carcinomas.$backslash$n$backslash$nMATERIAL AND METHOD: Five digital images of the tumor sections were obtained from 85 laryngeal carcinomas. Proportion of epithelial tumor component and stroma were measured by a software tool, allowing the pathologists to mark 205.6 $mu$m2 blocks on areas as carcinomatous/stromal, by clicking at the image. Totally, 3.451 mm2 tumor areas have been marked to 16.785 small square blocks for each case.$backslash$n$backslash$nRESULTS: Median follow up was 48 months (range 3-194). The mean tumor-stroma proportion was 48.63+18.18. There was no difference for tumor-stroma proportion when tumor location, grade, stage and perinodal invasion were considered. Although the following results were statistically insignificant, the mean tumor-stroma proportion was the lowest (37.46±12.49) for subglottic carcinomas, and it was 52.41±37.47, 50.86+19.84 and 44.56±16.91 for supraglottic, transglottic and glottic cases. The tumor-stroma proportion was lowest in cases with perinodal invasion and the highest in cases without lymph node metastasis (44.72±20.23, 47.77±17.37, 50.05±17.34). Tumor-stroma proportion was higher in the basaloid subtype compared with the classical squamous cell carcinoma (53.76±14.70 and 48.63±18.38 respectively). The overall and disease-free survival analysis did not reveal significance for tumor-stroma proportion (p=0.08 |
Doğan, Tunca; Karacalı, Bilge 2-D Thresholding of the Connectivity Map Following the Multiple Sequence Alignments of Diverse Datasets Inproceedings 2013. @inproceedings{Dogan2013a, title = {2-D Thresholding of the Connectivity Map Following the Multiple Sequence Alignments of Diverse Datasets}, author = {Tunca Doğan and Bilge Karacalı}, doi = {10.2316/p.2013.791-092}, year = {2013}, date = {2013-01-01}, abstract = {Multiple sequence alignment (MSA) is a widely used method to uncover the relationships between the biomolecular sequences. One essential prerequisite to apply this procedure is to have a considerable amount of similarity between the test sequences. It's usually not possible to obtain reliable results from the multiple alignments of large and diverse datasets. Here we propose a method to obtain sequence clusters of significant intragroup similarities and make sense out of the multiple alignments containing remote sequences. This is achieved by thresholding the pairwise connectivity map over 2 parameters. The first one is the inferred pairwise evolutionary distances and the second parameter is the number of gapless positions on the pairwise comparisons of the alignment. Threshold curves are generated regarding the statistical parameter values obtained from a shuffled dataset and probability distribution techniques are employed to select an optimum threshold curve that eliminate as much of the unreliable connectivities while keeping the reliable ones. We applied the method on a large and diverse dataset composed of nearly 18000 human proteins and measured the biological relevance of the recovered connectivities. Our precision measure (0.981) was nearly 20% higher than the one for the connectivities left after a classical thresholding procedure displaying a significant improvement. Finally we employed the method for the functional clustering of protein sequences in a gold standard dataset. We have also measured the performance, obtaining a higher F-measure (0.882) compared to a conventional clustering operation (0.827).}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } Multiple sequence alignment (MSA) is a widely used method to uncover the relationships between the biomolecular sequences. One essential prerequisite to apply this procedure is to have a considerable amount of similarity between the test sequences. It's usually not possible to obtain reliable results from the multiple alignments of large and diverse datasets. Here we propose a method to obtain sequence clusters of significant intragroup similarities and make sense out of the multiple alignments containing remote sequences. This is achieved by thresholding the pairwise connectivity map over 2 parameters. The first one is the inferred pairwise evolutionary distances and the second parameter is the number of gapless positions on the pairwise comparisons of the alignment. Threshold curves are generated regarding the statistical parameter values obtained from a shuffled dataset and probability distribution techniques are employed to select an optimum threshold curve that eliminate as much of the unreliable connectivities while keeping the reliable ones. We applied the method on a large and diverse dataset composed of nearly 18000 human proteins and measured the biological relevance of the recovered connectivities. Our precision measure (0.981) was nearly 20% higher than the one for the connectivities left after a classical thresholding procedure displaying a significant improvement. Finally we employed the method for the functional clustering of protein sequences in a gold standard dataset. We have also measured the performance, obtaining a higher F-measure (0.882) compared to a conventional clustering operation (0.827). |
Ünlü, Mehtat; cetinayak, Hasan Oǧuz; Önder, Devrim; Ecevit, Cenk; Akman, Fadime; Ikiz, Ahmet Ömer; Ada, Emel; Karacali, Bilge; Sarioǧlu, Sülen Laringeal skuamöz hücreli karsinomlarda tümör-stroma oranidotlessnidotlessn prognostik deǧeri Journal Article Turk Patoloji Dergisi/Turkish Journal of Pathology, 2013, ISSN: 10185615. @article{Unlu2013a, title = {Laringeal skuamöz hücreli karsinomlarda tümör-stroma oranidotlessnidotlessn prognostik deǧeri}, author = {Mehtat Ünlü and Hasan Oǧuz cetinayak and Devrim Önder and Cenk Ecevit and Fadime Akman and Ahmet Ömer Ikiz and Emel Ada and Bilge Karacali and Sülen Sarioǧlu}, doi = {10.5146/tjpath.2013.01144}, issn = {10185615}, year = {2013}, date = {2013-01-01}, journal = {Turk Patoloji Dergisi/Turkish Journal of Pathology}, abstract = {Objective: Tumor-stroma proportion of tumor has been presented as a prognostic factor in some types of adenocarcinomas, but there is no information about squamous cell carcinomas and laryngeal carcinomas. Material and Method: Five digital images of the tumor sections were obtained from 85 laryngeal carcinomas. Proportion of epithelial tumor component and stroma were measured by a software tool, allowing the pathologists to mark 205.6 $mu$m2 blocks on areas as carcinomatous/stromal, by clicking at the image. Totally, 3.451 mm2 tumor areas have been marked to 16.785 small square blocks for each case. Results: Median follow up was 48 months (range 3-194). The mean tumor-stroma proportion was 48.63+18.18. There was no difference for tumor-stroma proportion when tumor location, grade, stage and perinodal invasion were considered. Although the following results were statistically insignificant, the mean tumor-stroma proportion was the lowest (37.46±12.49) for subglottic carcinomas, and it was 52.41±37.47, 50.86+19.84 and 44.56±16.91 for supraglottic, transglottic and glottic cases. The tumor-stroma proportion was lowest in cases with perinodal invasion and the highest in cases without lymph node metastasis (44.72±20.23, 47.77±17.37, 50.05±17.34). Tumor-stroma proportion was higher in the basaloid subtype compared with the classical squamous cell carcinoma (53.76±14.70 and 48.63±18.38 respectively). The overall and disease-free survival analysis did not reveal significance for tumor-stroma proportion (p=0.08}, keywords = {}, pubstate = {published}, tppubtype = {article} } Objective: Tumor-stroma proportion of tumor has been presented as a prognostic factor in some types of adenocarcinomas, but there is no information about squamous cell carcinomas and laryngeal carcinomas. Material and Method: Five digital images of the tumor sections were obtained from 85 laryngeal carcinomas. Proportion of epithelial tumor component and stroma were measured by a software tool, allowing the pathologists to mark 205.6 $mu$m2 blocks on areas as carcinomatous/stromal, by clicking at the image. Totally, 3.451 mm2 tumor areas have been marked to 16.785 small square blocks for each case. Results: Median follow up was 48 months (range 3-194). The mean tumor-stroma proportion was 48.63+18.18. There was no difference for tumor-stroma proportion when tumor location, grade, stage and perinodal invasion were considered. Although the following results were statistically insignificant, the mean tumor-stroma proportion was the lowest (37.46±12.49) for subglottic carcinomas, and it was 52.41±37.47, 50.86+19.84 and 44.56±16.91 for supraglottic, transglottic and glottic cases. The tumor-stroma proportion was lowest in cases with perinodal invasion and the highest in cases without lymph node metastasis (44.72±20.23, 47.77±17.37, 50.05±17.34). Tumor-stroma proportion was higher in the basaloid subtype compared with the classical squamous cell carcinoma (53.76±14.70 and 48.63±18.38 respectively). The overall and disease-free survival analysis did not reveal significance for tumor-stroma proportion (p=0.08 |
Sümer, Can; Dinleyici, Salih M A fiber-integrated optical component fabricated via photopolymerization: Mode-selective grating coupler Journal Article Optics Communications, 2013, ISSN: 00304018. @article{Sumer2013, title = {A fiber-integrated optical component fabricated via photopolymerization: Mode-selective grating coupler}, author = {Can Sümer and Salih M Dinleyici}, doi = {10.1016/j.optcom.2013.06.028}, issn = {00304018}, year = {2013}, date = {2013-01-01}, journal = {Optics Communications}, abstract = {We demonstrate a mode-selective directional coupler based on a grating structure, which is fabricated by laser direct-writing on a photopolymer thin film. The device is implemented on the flat planar surface of the D-Fiber, enabling fiber integration, where an Acrylamide/Polyvinyl Alcohol based photopolymer material is used in the fabrication of the device. While the refractive index modulation properties of the polymer material are well known, surface relief and corrugation properties due to photopolymerization are investigated in this study. Theoretical model of the device is presented together with the optimization and simulation results of the final device; experimental results have been found to be in good agreement with simulations. textcopyright 2013 Elsevier B.V.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We demonstrate a mode-selective directional coupler based on a grating structure, which is fabricated by laser direct-writing on a photopolymer thin film. The device is implemented on the flat planar surface of the D-Fiber, enabling fiber integration, where an Acrylamide/Polyvinyl Alcohol based photopolymer material is used in the fabrication of the device. While the refractive index modulation properties of the polymer material are well known, surface relief and corrugation properties due to photopolymerization are investigated in this study. Theoretical model of the device is presented together with the optimization and simulation results of the final device; experimental results have been found to be in good agreement with simulations. textcopyright 2013 Elsevier B.V. |
Bidikli, B; Tatlicioglu, E; Bayrak, A; Zergeroglu, E A new robust ‘integral of sign of error’feedback controller with adaptive compensation gain Journal Article 52nd IEEE Conference on Decision and Control, pp. 3782–3787, 2013. @article{pop00007gb, title = {A new robust ‘integral of sign of error’feedback controller with adaptive compensation gain}, author = {B Bidikli and E Tatlicioglu and A Bayrak and E Zergeroglu}, year = {2013}, date = {2013-01-01}, journal = {52nd IEEE Conference on Decision and Control}, pages = {3782--3787}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bayrak, Alper; Tatlicioglu, Enver Online time delay identification and control for general classes of nonlinear systems Journal Article Transactions of the Institute of Measurement and Control, 2013, ISSN: 14770369. @article{Bayrak2013, title = {Online time delay identification and control for general classes of nonlinear systems}, author = {Alper Bayrak and Enver Tatlicioglu}, doi = {10.1177/0142331213476914}, issn = {14770369}, year = {2013}, date = {2013-01-01}, journal = {Transactions of the Institute of Measurement and Control}, abstract = {In this study, online identification of state delays is discussed. First, a novel adaptive time delay identification technique is proposed for general classes of nonlinear systems subject to state delays. The stability of the time delay identification algorithm is analyzed via Lyapunov-based techniques. In this work, we consider the time delay as a nonlinear parameter effecting the system which is a seemingly novel departure from the existing literature. As an extension, this technique is modified to design a tracking controller for general classes of nonlinear systems subject to state delays. The main novelty of this controller is that identification of unknown state delays are ensured while output tracking objective is satisfied. Numerical simulations are conducted that demonstrate the efficiency of the time delay identification algorithm and the tracking controller. textcopyright The Author(s) 2013.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this study, online identification of state delays is discussed. First, a novel adaptive time delay identification technique is proposed for general classes of nonlinear systems subject to state delays. The stability of the time delay identification algorithm is analyzed via Lyapunov-based techniques. In this work, we consider the time delay as a nonlinear parameter effecting the system which is a seemingly novel departure from the existing literature. As an extension, this technique is modified to design a tracking controller for general classes of nonlinear systems subject to state delays. The main novelty of this controller is that identification of unknown state delays are ensured while output tracking objective is satisfied. Numerical simulations are conducted that demonstrate the efficiency of the time delay identification algorithm and the tracking controller. textcopyright The Author(s) 2013. |
Bidikli, B; Tatlicioglu, E; Zergeroglu, E; Bayrak, A An asymptotically stable continuous robust controller for a class of uncertain MIMO nonlinear systems Journal Article arXiv preprint arXiv:1301., 5483 , 2013. @article{pop00016cb, title = {An asymptotically stable continuous robust controller for a class of uncertain MIMO nonlinear systems}, author = {B Bidikli and E Tatlicioglu and E Zergeroglu and A Bayrak}, year = {2013}, date = {2013-01-01}, journal = {arXiv preprint arXiv:1301.}, volume = {5483}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ozan, Ş; Gümüştekin, Ş Enhancing stereo matching performance by using polarization images Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00010f, title = {Enhancing stereo matching performance by using polarization images}, author = {Ş Ozan and Ş Gümüştekin}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Xu, Z; Yuan, J; Wang, K; Meng, LM; Hua, J; Wu, Z; Zuo, H; Dezhi, L; Xuemai, G; ..., Alpha-stable distributions in MATLAB. Journal Article Information Technology Journal, 13 (9), pp. 214–218, 2013. @article{pop00047b, title = {Alpha-stable distributions in MATLAB.}, author = {Z Xu and J Yuan and K Wang and LM Meng and J Hua and Z Wu and H Zuo and L Dezhi and G Xuemai and ...}, year = {2013}, date = {2013-01-01}, journal = {Information Technology Journal}, volume = {13}, number = {9}, pages = {214--218}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bayrak, Alper; Tatlicioglu, Enver; Bidikli, Baris; Zergeroglu, Erkan Robust adaptive control of nonlinear systems with unknown state delay Inproceedings 2013 9th Asian Control Conference, ASCC 2013, 2013, ISBN: 9781467357692. @inproceedings{Bayrak2013a, title = {Robust adaptive control of nonlinear systems with unknown state delay}, author = {Alper Bayrak and Enver Tatlicioglu and Baris Bidikli and Erkan Zergeroglu}, doi = {10.1109/ASCC.2013.6606225}, isbn = {9781467357692}, year = {2013}, date = {2013-01-01}, booktitle = {2013 9th Asian Control Conference, ASCC 2013}, abstract = {In this work, we propose a new robust adaptive controller for a class of multi-input multi-output nonlinear systems subject to uncertain state delay. The proposed method is proven to yield semi-global asymptotic tracking despite the presence of additive input and output disturbances and parametric uncertainty in the system dynamics. An adaptive desired system compensation in conjunction with a continuous nonlinear integral feedback component is utilized in the design of the controller and Lyapunov-based techniques, are used to prove that the tracking error is asymptotically driven to zero. Numerical simulation results are presented to demonstrate the effectiveness of the proposed method. textcopyright 2013 IEEE.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In this work, we propose a new robust adaptive controller for a class of multi-input multi-output nonlinear systems subject to uncertain state delay. The proposed method is proven to yield semi-global asymptotic tracking despite the presence of additive input and output disturbances and parametric uncertainty in the system dynamics. An adaptive desired system compensation in conjunction with a continuous nonlinear integral feedback component is utilized in the design of the controller and Lyapunov-based techniques, are used to prove that the tracking error is asymptotically driven to zero. Numerical simulation results are presented to demonstrate the effectiveness of the proposed method. textcopyright 2013 IEEE. |
Tanyer, Ilker; Tatlicioglu, Enver; Zergeroglu, Erkan A robust dynamic inversion technique for asymptotic tracking control of an aircraft Inproceedings 2013 9th Asian Control Conference, ASCC 2013, 2013, ISBN: 9781467357692. @inproceedings{Tanyer2013, title = {A robust dynamic inversion technique for asymptotic tracking control of an aircraft}, author = {Ilker Tanyer and Enver Tatlicioglu and Erkan Zergeroglu}, doi = {10.1109/ASCC.2013.6606263}, isbn = {9781467357692}, year = {2013}, date = {2013-01-01}, booktitle = {2013 9th Asian Control Conference, ASCC 2013}, abstract = {— In this paper, a tracking controller is developed for an aircraft model subject to uncertainties in the dynamics and additive state-dependent nonlinear disturbance-like terms. In the design of the controller, dynamic inversion technique is utilized in conjuction with a robust term. Only the output of aircraft dynamics is utilized in the controller design and acceleration measurements are not required. Lyapunov based stability analysis is used to prove global asymptotic tracking.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } — In this paper, a tracking controller is developed for an aircraft model subject to uncertainties in the dynamics and additive state-dependent nonlinear disturbance-like terms. In the design of the controller, dynamic inversion technique is utilized in conjuction with a robust term. Only the output of aircraft dynamics is utilized in the controller design and acceleration measurements are not required. Lyapunov based stability analysis is used to prove global asymptotic tracking. |
Atakan, Baris Optimal transmission probability in binary molecular communication Journal Article IEEE Communications Letters, 2013, ISSN: 10897798. @article{Atakan2013, title = {Optimal transmission probability in binary molecular communication}, author = {Baris Atakan}, doi = {10.1109/LCOMM.2013.041813.130255}, issn = {10897798}, year = {2013}, date = {2013-01-01}, journal = {IEEE Communications Letters}, abstract = {Molecular communication (MC) is a promising nanoscale communication paradigm that enables nanomachines to share information by using messenger mo-le-cu-les. In this paper, an expression for the achievable rate in MC is first given. Then, using this expression, an optimal transmission probability is developed to maximize the MC rate. Numerical results show that the MC rate is time-dependent and the molecules freely wandering in the medium negatively affect the MC performance. However, the proposed optimal transmission probability is shown to maximize the MC rate. View full abstract}, keywords = {}, pubstate = {published}, tppubtype = {article} } Molecular communication (MC) is a promising nanoscale communication paradigm that enables nanomachines to share information by using messenger mo-le-cu-les. In this paper, an expression for the achievable rate in MC is first given. Then, using this expression, an optimal transmission probability is developed to maximize the MC rate. Numerical results show that the MC rate is time-dependent and the molecules freely wandering in the medium negatively affect the MC performance. However, the proposed optimal transmission probability is shown to maximize the MC rate. View full abstract |
Tanyer, İ; Tatlıcıoğlu, E; Zergeroğlu, E Robust tracking controller for UAVs Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00096, title = {Robust tracking controller for UAVs}, author = {İ Tanyer and E Tatlıcıoğlu and E Zergeroğlu}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bıdıklı, B; Tatlıcıoğlu, E; Bayrak, A; Zergeroğlu, E A new robust'integral of sign of error'feedback controller with adaptive compensation gain Journal Article IEEE, 2013. @article{pop00097, title = {A new robust'integral of sign of error'feedback controller with adaptive compensation gain}, author = {B Bıdıklı and E Tatlıcıoğlu and A Bayrak and E Zergeroğlu}, year = {2013}, date = {2013-01-01}, journal = {IEEE}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bayrak, Alper; Tatlicioglu, Enver Online time delay identification and control for general classes of nonlinear systems Journal Article Transactions of the Institute of Measurement and Control, 2013, ISSN: 14770369. @article{Bayrak2013c, title = {Online time delay identification and control for general classes of nonlinear systems}, author = {Alper Bayrak and Enver Tatlicioglu}, doi = {10.1177/0142331213476914}, issn = {14770369}, year = {2013}, date = {2013-01-01}, journal = {Transactions of the Institute of Measurement and Control}, abstract = {In this study, online identification of state delays is discussed. First, a novel adaptive time delay identification technique is proposed for general classes of nonlinear systems subject to state delays. The stability of the time delay identification algorithm is analyzed via Lyapunov-based techniques. In this work, we consider the time delay as a nonlinear parameter effecting the system which is a seemingly novel departure from the existing literature. As an extension, this technique is modified to design a tracking controller for general classes of nonlinear systems subject to state delays. The main novelty of this controller is that identification of unknown state delays are ensured while output tracking objective is satisfied. Numerical simulations are conducted that demonstrate the efficiency of the time delay identification algorithm and the tracking controller. textcopyright The Author(s) 2013.}, keywords = {}, pubstate = {published}, tppubtype = {article} } In this study, online identification of state delays is discussed. First, a novel adaptive time delay identification technique is proposed for general classes of nonlinear systems subject to state delays. The stability of the time delay identification algorithm is analyzed via Lyapunov-based techniques. In this work, we consider the time delay as a nonlinear parameter effecting the system which is a seemingly novel departure from the existing literature. As an extension, this technique is modified to design a tracking controller for general classes of nonlinear systems subject to state delays. The main novelty of this controller is that identification of unknown state delays are ensured while output tracking objective is satisfied. Numerical simulations are conducted that demonstrate the efficiency of the time delay identification algorithm and the tracking controller. textcopyright The Author(s) 2013. |
Yaman, Fatih; Yakhno, Valery G; Potthast, Roland A survey on inverse problems for applied sciences Miscellaneous 2013, ISSN: 1024123X. @misc{Yaman2013a, title = {A survey on inverse problems for applied sciences}, author = {Fatih Yaman and Valery G Yakhno and Roland Potthast}, doi = {10.1155/2013/976837}, issn = {1024123X}, year = {2013}, date = {2013-01-01}, booktitle = {Mathematical Problems in Engineering}, abstract = {The aim of this paper is to introduce inversion-based engineering applications and to investigate some of the important ones from mathematical point of view. To do this we employ acoustic, electromagnetic, and elastic waves for presenting different types of inverse problems. More specifically, we first study location, shape, and boundary parameter reconstruction algorithms for the inaccessible targets in acoustics. The inverse problems for the time-dependent differential equations of isotropic and anisotropic elasticity are reviewed in the following section of the paper. These problems were the objects of the study by many authors in the last several decades. The physical interpretations for almost all of these problems are given, and the geophysical applications for some of them are described. In our last section, an introduction with many links into the literature is given for modern algorithms which combine techniques from classical inverse problems with stochastic tools into ensemble methods both for data assimilation as well as for forecasting.}, keywords = {}, pubstate = {published}, tppubtype = {misc} } The aim of this paper is to introduce inversion-based engineering applications and to investigate some of the important ones from mathematical point of view. To do this we employ acoustic, electromagnetic, and elastic waves for presenting different types of inverse problems. More specifically, we first study location, shape, and boundary parameter reconstruction algorithms for the inaccessible targets in acoustics. The inverse problems for the time-dependent differential equations of isotropic and anisotropic elasticity are reviewed in the following section of the paper. These problems were the objects of the study by many authors in the last several decades. The physical interpretations for almost all of these problems are given, and the geophysical applications for some of them are described. In our last section, an introduction with many links into the literature is given for modern algorithms which combine techniques from classical inverse problems with stochastic tools into ensemble methods both for data assimilation as well as for forecasting. |
Abbagnale, A; Abouzeid, AA; Achtzehn, A; Agrawal, P; Akan, OB; Akyildiz, IF; ..., 2012 Index IEEE Transactions on Mobile Computing Vol. 11 Journal Article IEEE Transactions on Mobile Computing, 12 (1), pp. 1–1, 2013. @article{pop00035b, title = {2012 Index IEEE Transactions on Mobile Computing Vol. 11}, author = {A Abbagnale and AA Abouzeid and A Achtzehn and P Agrawal and OB Akan and IF Akyildiz and ...}, year = {2013}, date = {2013-01-01}, journal = {IEEE Transactions on Mobile Computing}, volume = {12}, number = {1}, pages = {1--1}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Yaman, Fatih; Yakhno, Valery G; Potthast, Roland Recent theory and applications on inverse problems Miscellaneous 2013, ISSN: 1024123X. @misc{Yaman2013c, title = {Recent theory and applications on inverse problems}, author = {Fatih Yaman and Valery G Yakhno and Roland Potthast}, doi = {10.1155/2013/303154}, issn = {1024123X}, year = {2013}, date = {2013-01-01}, booktitle = {Mathematical Problems in Engineering}, keywords = {}, pubstate = {published}, tppubtype = {misc} } |
Başturk, Ilhan; Özbek, Berna; Edemen, Caǧatay; Tan, Ahmet Serdar; Zeydan, Engin; Ergüt, Salih Radio resource management for OFDMA-based mobile relay enhanced heterogenous cellular networks Inproceedings IEEE Vehicular Technology Conference, 2013, ISSN: 15502252. @inproceedings{Basturk2013, title = {Radio resource management for OFDMA-based mobile relay enhanced heterogenous cellular networks}, author = {Ilhan Başturk and Berna Özbek and Caǧatay Edemen and Ahmet Serdar Tan and Engin Zeydan and Salih Ergüt}, doi = {10.1109/VTCSpring.2013.6692729}, issn = {15502252}, year = {2013}, date = {2013-01-01}, booktitle = {IEEE Vehicular Technology Conference}, abstract = {In this paper, we focus on the radio resource management problem for the Orthogonal Frequency Division Multiple Access (OFDMA)-based mobile relay-enhanced het erogenous cellular networks. We combine mobile relaying and data offloading scenarios to increase the capacity of the system and cope with the mobile data traffic volume that is increased by the number of wireless subscribers accessing mobile data services. We propose network interface selection, relay selection and resource allocation solutions for this scenario and show effect of relaying and data offloading on the system capacity and on the ratio of satisfied users. textcopyright 2013 IEEE.}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } In this paper, we focus on the radio resource management problem for the Orthogonal Frequency Division Multiple Access (OFDMA)-based mobile relay-enhanced het erogenous cellular networks. We combine mobile relaying and data offloading scenarios to increase the capacity of the system and cope with the mobile data traffic volume that is increased by the number of wireless subscribers accessing mobile data services. We propose network interface selection, relay selection and resource allocation solutions for this scenario and show effect of relaying and data offloading on the system capacity and on the ratio of satisfied users. textcopyright 2013 IEEE. |
Yaman, Fatih; Weiland, Thomas Location and shape reconstructions of objects buried in inhomogeneously penetrable cylinders Inproceedings Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013, 2013, ISBN: 9781467357074. @inproceedings{Yaman2013e, title = {Location and shape reconstructions of objects buried in inhomogeneously penetrable cylinders}, author = {Fatih Yaman and Thomas Weiland}, doi = {10.1109/ICEAA.2013.6632499}, isbn = {9781467357074}, year = {2013}, date = {2013-01-01}, booktitle = {Proceedings of the 2013 International Conference on Electromagnetics in Advanced Applications, ICEAA 2013}, keywords = {}, pubstate = {published}, tppubtype = {inproceedings} } |
Bastürk, I; Özbek, B; Ruyet, Le D Queue-aware resource allocation for OFDMA-based mobile relay enhanced networks Journal Article Wireless Communication Systems (ISWCS 2013), Proceedings of the Tenth …, 2013. @article{pop00018cb, title = {Queue-aware resource allocation for OFDMA-based mobile relay enhanced networks}, author = {I Bastürk and B Özbek and Le D Ruyet}, year = {2013}, date = {2013-01-01}, journal = {Wireless Communication Systems (ISWCS 2013), Proceedings of the Tenth …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Akhmedov, M; Çatay, B; Apaydın, MS Distinguishing the type of NOE for NMR protein structure-based assignments Journal Article 2013 21st Signal Processing and Communications Applications Conference (SIU …, 2013. @article{pop00009j, title = {Distinguishing the type of NOE for NMR protein structure-based assignments}, author = {M Akhmedov and B Çatay and MS Apaydın}, year = {2013}, date = {2013-01-01}, journal = {2013 21st Signal Processing and Communications Applications Conference (SIU …}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Özcan, D; Yüksel, K Frekans Bölgesinde Optik Yansıma (OFDR) Ölçüm Teknikleri Ve Fiber Bragg Izgaralar (FBG) Kullanılarak Yeni Bir Sensör Yaklaşımının Analiz Ve Uygulaması Journal Article FOTONİK 2013, 15. Ulusal Optik, Elektro-Optik ve Fotonik Çalıştayı, pp. 26–27, 2013. @article{pop00041b, title = {Frekans Bölgesinde Optik Yansıma (OFDR) Ölçüm Teknikleri Ve Fiber Bragg Izgaralar (FBG) Kullanılarak Yeni Bir Sensör Yaklaşımının Analiz Ve Uygulaması}, author = {D Özcan and K Yüksel}, year = {2013}, date = {2013-01-01}, journal = {FOTONİK 2013, 15. Ulusal Optik, Elektro-Optik ve Fotonik Çalıştayı}, pages = {26--27}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Yuksel, K; Wuilpart, M; Megret, P YEREL OPTİK AĞLARDA FİZİKSEL KATMANDAKİ PARAMETRELERİN İZLENMESİNE YÖNELİK ARAÇLARIN GELİŞTİRİLMESİ Journal Article V. İLETİŞİM TEKNOLOJİLERİ ULUSAL SEMPOZYUMU, pp. 134–140, 2013. @article{pop00042d, title = {YEREL OPTİK AĞLARDA FİZİKSEL KATMANDAKİ PARAMETRELERİN İZLENMESİNE YÖNELİK ARAÇLARIN GELİŞTİRİLMESİ}, author = {K Yuksel and M Wuilpart and P Megret}, year = {2013}, date = {2013-01-01}, journal = {V. İLETİŞİM TEKNOLOJİLERİ ULUSAL SEMPOZYUMU}, pages = {134--140}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kangal, S Development of radar-absorbing composite structures Journal Article İzmir Institute of Technology, 2013. @article{pop00043b, title = {Development of radar-absorbing composite structures}, author = {S Kangal}, year = {2013}, date = {2013-01-01}, journal = {İzmir Institute of Technology}, keywords = {}, pubstate = {published}, tppubtype = {article} } |