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- MakaleAçık Erişim2026Predicting middle school students' academic achievement in mathematics with aAnew hybrid approach
Dogan, Gurkan; Demiralp, Demet
The academic achievement of middle school students is one of the critical steps in their educational journey that affects their future academic and career prospects. During this transition period, students are faced with a variety of challenges related to their families, schools, and the individual themselves. Research shows that academic performance during these formative years is critical for future educational success and overall life success. Therefore, addressing students' academic achievement, which depends on various factors during this period, is of particular importance for both institutional and individual planning and orientation in the future. In this study, a new hybrid approach based on artificial neural networks that enables automatic analysis of data on family, school, and individual factors affecting middle school students' academic achievement in mathematics is proposed. A publicly available student performance dataset was used for training and testing the proposed hybrid approach and other models. This dataset consists of data such as mathematics grades, family information, residential information, and health status information for 395 students enrolled in two public schools in the Alentejo region of Portugal. The proposed approach achieved an R2 score of 88.6% in experimental studies with this data set, providing approximately 3% higher accuracy than its closest competitor among other methods in the literature.
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İncele - MakaleYalnız künye2010Scopus SJRQ3THE ROLE OF METHYLATED ADRENOMEDULLIN IN ENZYMATIC ANTIOXIDANT DEFENSE RESPONSE TO COLD STRESS
Yildirim, Nuran Cikcikoglu; Yurekli, Muhittin
The aim of our study was to investigate the effects of methylated adrenomedullin (met-AdM) on some antioxidant enzymes, such as catalase (CAT), glutathione peroxidase (GSH-P-X) and superoxide dismutase (SOD) in rat kidney and heart tissues after cold stress treatment. Male Wistar rats were divided into 4 groups (control, met-AdM, cold stress and cold stress + met-AdM treatments). The rats were kept at room temperature, exposed to a 16/8-hours light/dark cycle. The rats were maintained at ad libitum (free) feeding habit. In met-AdM treated group, animals received intraperitoneal injection of met-AdM (2 mg/g body weight) once a day during a week. For the cold stress exposure, the rats were kept in separate cages at 10 degrees C for a week. Control group rats were kept at laboratory conditions. CAT, GSH-P-X and SOD enzyme activities were investigated in kidney and heart tissues. In kidney tissue compared to control, CAT and GSH-P-X enzyme activity was decreased but SOD was increased in met-AdM-treated group. In met-AdM+cold stress group, only the SOD enzyme activity was significantly increased but CAT and GSH-P-X decreased. SOD and GSH-P-X enzyme activities were increased by cold stress but CAT was decreased in kidney. In heart tissue, CAT and GSH-P-X activities were decreased but SOD was increased in met-AdM-treated group compared to control. All enzyme activities were decreased in met-AdM+cold stress group as well as by cold stress in heart, with regard to control. Cold stress can disrupt the balance in an oxidant/antioxidant system and cause oxidative damage to kidney and heart tissues by altering the enzymatic and non-enzymatic antioxidant status. We can suggest that met-AdM has possible roles in regulation of stress but we need further studies revealing responses of met-AdM in different tissues.
AtıfWoS3İncele - Derleme MakaleAçık Erişim2016Scopus SJRQ3Pregnancy-Related Cardiovascular Complications: Case Presentation and Review of Literature
Altinsoy, Hasan Baki; Alatas, Ozkan; Colak, Salih; Atalay, Hakan; Dogan, Omer Faruk
Background: Cardiovascular complications that can cause severe catastrophic outcomes for both the mother and the fetus are rarely seen during pregnancy. Time to diagnosis is often delayed by a low degree of suspicion and atypical presentation. We report surgical strategies in three pregnant women with cardiovascular complications. Methods: A retrospective search from 2009 to 2016 identified three pregnant women who underwent urgent cardiac surgery. We used extracorporeal circulation (ECC) without cesarean section with careful follow-up of the fetuses during the perioperative and postoperative period. We used levosimendan as a potent inodilator in all patients to increase feto-placental blood flow and fetal heart rhythm. Results: Median time to diagnosis was 23.8 h (range 11.7-120 h) and median time from diagnosis to arrival in the operating theater was 9.8 h (range 7.4-19.8 h). One patient with prosthetic heart valve thrombosis underwent concomitant cesarean section prior to cardiac surgery. In a young pregnant woman who had spontaneous dissection of the left anterior descending artery, on-pump beating heart coronary artery bypass grafting was performed without cross clamping. Two and three months after surgery, cesarean sections were performed without any complication in two pregnant women. Conclusion: Because unusual cardiovascular complications are the main cause of maternal and/or fetus death during pregnancy, prompt and exact diagnosis is very important. Life-saving surgical strategy with the help of appropriate teams are necessary to optimize outcome for both mother and baby.
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İncele - MakaleYalnız künye2019Scopus SJRQ4CONVOLUTIONAL LONG-SHORT TERM MEMORY NETWORKS MODEL FOR LONG DURATION EEG SIGNAL CLASSIFICATION
Baloglu, Ulas Baran; Yildirim, Ozal
Background and objective: Deep learning structures have recently achieved remarkable success in the field of machine learning. Convolutional neural networks (CNN) in image processing and long-short term memory (LSTM) in the time-series analysis are commonly used deep learning algorithms. Healthcare applications of deep learning algorithms provide important contributions for computer-aided diagnosis research. In this study, convolutional long-short term memory (CLSTM) network was used for automatic classification of EEG signals and automatic seizure detection. Methods: A new nine-layer deep network model consisting of convolutional and LSTM layers was designed. The signals processed in the convolutional layers were given as an input to the LSTM network whose outputs were processed in densely connected neural network layers. The EEG data is appropriate for a model having 1-D convolution layers. A bidirectional model was employed in the LSTM layer. Results: Bonn University EEG database with five different datasets was used for experimental studies. In this database, each dataset contains 23.6 s duration 100 single channel EEG segments which consist of 4097 dimensional samples (173.61 Hz). Eight two-class and three three-class clinical scenarios were examined. When the experimental results were evaluated, it was seen that the proposed model had high accuracy on both binary and ternary classification tasks. Conclusions: The proposed end-to-end learning structure showed a good performance without using any hand-crafted feature extraction or shallow classifiers to detect the seizures. The model does not require filtering, and also automatically learns to filter the input as well. As a result, the proposed model can process long duration EEG signals without applying segmentation, and can detect epileptic seizures automatically by using the correlation of ictal and interictal signals of raw data.
AtıfWoS17OpenAlex19İncele - MakaleAçık Erişim2016Scopus SJRQ2Performance evaluation of crumb rubber and paraffin modified stone mastic asphalt
Kök, Baha Vural; Yilmaz, Mehmet; Akpolat, Mustafa
Recently, crumb rubber (CR) obtained from waste tires and Fischer-Tropsch paraffin are mostly used in bitumen modification to improve the performance of bituminous mixtures. Each of these additives affects the different properties of mixtures. There are limited studies in the literature about the combined usage of additive in the same mixture to utilize the different characteristics. In this study, the stability, stiffness, fatigue resistance, permanent deformation resistance, and moisture susceptibility characteristics of the stone mastic asphalt prepared with the bitumen modified with CR and paraffin were examined and compared with the control mixture. It was determined that CR-modified mixtures showed significantly more elastic characteristics. The mixture in which the 10% CR and 3% paraffin were used together gave better results in terms of moisture susceptibility and fatigue resistance when compared with the control mixture. It was determined that the use of paraffin together with CR contributed to the improved performance, and was in accordance with the CR in terms of mechanical characteristics of stone mastic asphalt.
AtıfWoS12OpenAlex13İncele - MakaleYalnız künye2026The Voice of European Turks: The Establishment, Broadcasting Practices, and Cultural Role of Germany-Licensed Kanal Avrupa Television
Senol, Sengul
Kanal Avrupa Television is a Germany-licensed Turkish-language media organization that has broadcast continuously since 2004. This study examines its role in supporting cultural memory, identity negotiation, Turkish-language continuity, social participation, and connections with T & uuml;rkiye among Turkish communities in Germany and other parts of Europe. Using a qualitative single-case study and document-analysis approach, the research evaluates the channel's institutional development, broadcasting mission, program content, audience orientation, and digital-platform activities. The findings suggest that Kanal Avrupa Television functions as a diaspora media institution and communicative public sphere in which the identity of the European Turk is articulated and negotiated. Its programs provide opportunities for cultural representation, inter-generational transmission of language and traditions, discussion of social and political concerns, and maintenance of transnational connections. The analysis also identifies economic sustainability, digital transformation, generational change, and editorial independence as important challenges affecting the channel's future. By examining these institutional and cultural dimensions, the study contributes to scholarship on diaspora media, migration, cultural identity, and collective memory.
- MakaleÖn baskısı açık2013Scopus SJRQ2Effect of dietary n-3 series fatty acids on sperm production in the freshwater crayfish, Astacus leptodactylus (Eschscholtz) (Astacidae)
Harlioglu, Muzaffer Mustafa; Köprücü, Kenan; Harlioglu, Ayse Gul; Yonar, Serpil Mise; Duran, Tuba Cakmak; Çakmak, Mehmet Nuri; Aksu, Onder; Özcan, Sinan; Kutluyer, Filiz; Gündogdu, Hande
The objective of the present work was to evaluate the effects of three different rates of long chain n-3 polyunsaturated fatty acid (LC n-3 PUFA) on the sperm number of Astacus leptodactylus. The experiment was carried out with the four following treatments: control group (not supplemented LC n-3 PUFA), D1 (1 %), D2 (2 %) and D3 (3 %). The sperm number of A. leptodactylus was counted; the reproductive system was weighted; and the macroscopical analysis of the testes and vasa deferentia (DVD) were conducted. In addition, gonado-somatic index (GI) and testes index (TI) were also calculated. The results showed that there was a significant difference between the crayfish fed LC n-3 PUFA supplemented diets (D1, D2, D3) and control in mean sperm number (P < 0.05). The highest sperm number was found for the crayfish fed D3 (6.27 +/- A 0.14 x 10(8) sperm/distal vas deferens section). The results also showed that the reproductive system of the crayfish fed D3 and D2 was significantly heavier than that of the crayfish fed the control and D1 (P < 0.05). On the other hand, there was not a significant difference in the testes weight and vasa deferentia weight between the crayfish fed the control and D1, and between the crayfish fed D2 and D3 (P < 0.05). GI of the crayfish fed D3 and D2 was significantly higher than that of the crayfish fed control and D1 (P > 0.05), but there was not a significant difference in the TI of the crayfish fed control, D1, D2 and D3 (P > 0.05). In conclusion, diets containing different levels of LC n-3 PUFA significantly increase the sperm number of A. leptodactylus, and they are crucial for the production of higher number of sperm in this species.
AtıfWoS30OpenAlex34İncele - MakaleYalnız künye2022Scopus SJRQ1Analysis of discontinuous contact problem in two functionally graded layers resting on a rigid plane by using finite element method
Polat, Alper; Kaya, Yusuf
In this study, the problem of discontinuous contact in two functionally graded (FG) layers resting on a rigid plane and loaded by two rigid blocks is solved by the finite element method (FEM). Separate analyzes are made for the cases where the top surfaces of the problem layers are metal, the bottom surfaces are ceramic and the top surfaces are ceramic and the bottom surfaces are metal. For the problem, it is accepted that all surfaces are frictionless. A two-dimensional FEM analysis of the problem is made by using a special macro added to the ANSYS package program The solution of this study, which has no analytical solution in the literature, is given with FEM. Analyzes are made by loading different Q and P loads on the blocks. The normal stress (sigma y) distributions at the interfaces of FG layers and between the substrate and the rigid plane interface are obtained. In addition, the starting and ending points of the separations between these surfaces are determined. The normal stresses (sigma x, sigma y) and shear stresses (tau xy) at the point of separation are obtained along the depth. The results obtained are shown in graphics and tables. With this method, effective results are obtained in a very short time. In addition, analytically complex and long problems can be solved with this method.
AtıfWoS23İncele - MakaleAçık Erişim2022TAIL DEPENDENCE ESTIMATION BASED ON SMOOTH ESTIMATION OF DIAGONAL SECTION
Susam, Selim Orhun
This paper is mainly developed around the diagonal section which is strongly related to tail dependence coefficients as defined in Nelsen [19]. Hence, we propose a flexible method for estimating tail dependence coefficients based on the new smooth estimation of the diagonal section based on the Bernstein polynomial approximation. To assess the performance of the new estimators we conduct the Monte-Carlo simulation study. As a result of the simulation study, both estimators perform satisfactory performance. Also, the estimation methods are illustrated by real data examples.
AtıfWoS1OpenAlex1İncele - MakaleAçık Erişim2017Scopus SJRQ2New national and regional bryophyte records, 52
Ellis, L. T.; Alatas, M.; Aleffi, M.; Alegro, A.; Segota, V.; Ozimec, S.; Vukovic, N.; Koletic, N.; Prlic, D.; Bontek, M.
AtıfOpenAlex40İncele - MakaleAçık Erişim2019Scopus SJRQ2Neogene volcanism in Elazig-Tunceli area (eastern Anatolia): geochronological and petrological constraints
Agostini, Samuele; Savasçin, Mehmet Yilmaz; Di Giuseppe, Paolo; Di Stefano, Flavio; Karaoglu, Ozgur; Lustrino, Michele; Manetti, Piero; Ersoy, Yalcin; Kürüm, Sevcan; Önal, Ayten Oztufekci
AtıfOpenAlex15İncele - MakaleYalnız künye2017Scopus SJRQ1Transition from Compression to Strike-slip Tectonics Revealed by Miocene-Pleistocene Volcanism West of the Karliova Triple Junction (East Anatolia)
Di Giuseppe, Paolo; Agostini, Samuele; Lustrino, Michele; Karaoglu, Ozgur; Savasçin, Mehmet Yilmaz; Manetti, Piero; Ersoy, Yalcin
AtıfOpenAlex50İncele - MakaleYalnız künye2020Scopus SJRQ1Petrological evolution of Karliova-Varto volcanism (Eastern Turkey): Magma genesis in a transtensional triple-junction tectonic setting
Karaoglu, Ozgur; Gülmez, Fatma; Göçrnengil, Gonenc; Lustrino, Michele; Di Giuseppe, Paolo; Manetti, Piero; Savasçin, Mehmet Yilmaz; Agostini, Samuele
AtıfOpenAlex26İncele - MakaleYalnız künye2015Scopus SJRQ1A novel type heterojunction photodiodes formed junctions of Au/LiZnSnO and LiZnSnO/p-Si in series
Aydin, H.; Tataroglu, A.; Al-Ghamdi, Ahmed A.; Yakuphanoglu, F.; El-Tantawy, Farid; Farooq, W. A.
AtıfOpenAlex57İncele - MakaleAçık Erişim2013Scopus SJRQ1Petrology of the Ispendere (Malatya) ophiolite from the Southeast Anatolia: implications for the Late Mesozoic evolution of the southern Neotethyan Ocean
Parlak, Osman; Karaoglan, Fatih; Rizaoglu, Tamer; Nurlu, Nusret; Bagci, Utku; Höck, Volker; Önal, Ayten Oztufekci; Kürüm, Sevcan; Topak, Yusuf
AtıfOpenAlex36İncele - MakaleAçık Erişim2014Scopus SJRQ1New Analytical Model for Cumulative Infiltration into Dual-Permeability Soils
Lassabatere, Laurent; Yilmaz, Deniz; Peyrard, Xavier; Peyneau, Pierre Emmanuel; Lenoir, Thomas; Simunek, Jiri; Angulo-Jaramillo, Rafael
AtıfOpenAlex59İncele - MakaleAçık Erişim2018Scopus SJRQ2Chemical Composition of the Essential Oil and Antimicrobial Activity of Scaligeria DC. Taxa and Implications for Taxonomy
Baldemir, Ayse; Demirci, Betul; Paksoy, Mehmet Yavuz; Ilgün, Selen; Kosar, Mberra; Baser, Kemal Husnu Can; Demirci, Fatih
AtıfOpenAlex5İncele - MakaleYalnız künye2022Scopus SJRQ2Non-similar solutions and sensitivity analysis of nano-magnetic Eyring-Powell fluid flow over a circular cylinder with nonlinear convection
Basha, H. Thameem; Reddy, S. R. R.; Prasad, V. Ramachandra; Son, Kwon Joong; Ahammad, N. Ameer; Akkurt, Nevzat
AtıfOpenAlex15İncele - MakaleYalnız künye2018Scopus SJRQ1Physical properties of structural soils containing waste materials to achieve urban greening
Yilmaz, Deniz; Cannavo, Patrice; Séré, Geoffroy; Vidal-Beaudet, Laure; Legret, Michel; Damas, Olivier; Peyneau, Pierre-Emmanuel
AtıfOpenAlex75İncele - MakaleAçık Erişim2015Scopus SJRQ2Electrical characterization of metal/diamond-like carbon/inorganic semiconductor MIS Schottky barrier diodes
Basman, N.; Aslan, N.; Uzun, O.; Cankaya, G.; Kolemen, U.
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