Scopus İndeksli Yayınlar Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.14627/7
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Article Citation - WoS: 1Citation - Scopus: 1Dual-Phase Malicious User Detection Scheme for IM-OFDMA Systems Using IQ Imbalance(Wiley, 2025) Alaca, Ozgur; Althunibat, Saud; Riza Ekti, Ali; Yarkan, Serhan; Miller, Scott L.; Qaraqe, Khalid A.Physical-layer security techniques have contributed to the achievement of various security objectives in an efficient and lightweight manner. Thus, these techniques have been widely considered for limited-resource networks such as Internet of Things networks. Among the different security objectives, malicious user detection by exploiting physical-layer parameters has demonstrated efficient performance. In this work, malicious user detection in the recently proposed index modulation-based orthogonal frequency division multiple access (IM-OFDMA) is addressed. The proposed malicious user detection scheme exploits the hardware impairments, especially the in-phase and quadrature imbalance parameters, for both legitimate and malicious users to design a dual-phase efficient detection scheme. The proposed scheme accounts for the special characteristics of IM-OFDMA transmission that are different from other multiple-access techniques. The performance of the proposed scheme was evaluated considering detection probability and false alarm probability performance metrics. Moreover, closed-form expressions of these metrics were derived for both phases and were validated by Monte Carlo simulation results under different configurations of IM-OFDMA systems.Article Citation - WoS: 4Citation - Scopus: 4An Efficient and Robust 3d Medical Image Classification Approach Based on 3d Cnn, Time-Distributed 2d Cnn-Blstm Models, and Mrmr Feature Selection(Wiley, 2024) Akbacak, Enver; Muzoglu, NedimThe advent of 3D medical imaging has been a turning point in the diagnosis of various diseases, as voxel information from adjacent slices helps radiologists better understand complex anatomical relationships. However, the interpretation of medical images by radiologists with different levels of expertise can vary and is also time-consuming. In the last decades, artificial intelligence-based computer-aided systems have provided fast and more reliable diagnostic insights with great potential for various clinical purposes. This paper proposes a significant deep learning based 3D medical image diagnosis method. The method classifies MedMNIST3D, which consists of six 3D biomedical datasets obtained from CT, MRA, and electron microscopy modalities. The proposed method concatenates 3D image features extracted from three independent networks, a 3D CNN, and two time-distributed ResNet BLSTM structures. The ultimate discriminative features are selected via the minimum redundancy maximum relevance (mRMR) feature selection method. Those features are then classified by a neural network model. Experiments adhere to the rules of the official splits and evaluation metrics of the MedMNIST3D datasets. The results reveal that the proposed approach outperforms similar studies in terms of accuracy and AUC.Article Citation - WoS: 5Citation - Scopus: 5Disaster Risk Perception and Sustainable Earthquake Awareness Among Public and Private University Nursing Students(Wiley, 2024) Kolac, Nurcan; Eroglu, Nermin; Nirgiz, CansuBackground: This research was conducted in descriptive type to determine the disaster risk perception and sustainable earthquake awareness of nursing students studying at public and private universities. Methods: The study sample consisted of 400 nursing students studying at one public and one private university. The research was conducted between April and May 2023. The data were collected using a Sociodemographic Form, University Students Disaster Risk Perception Scale (USDRPS), and Sustainable Earthquake Awareness Scale (SEAS). Data were collected online using a questionnaire created on Google Forms. Analyses included frequency, percentage, mean, standard deviation values, independent groups t-test, post-hoc Tukey test, LSD, and ANOVA test. Results: Of the students, 61.8% had a disaster experience, 17.4% had lost a relative in the disaster, and 76.8% did not consider themselves prepared for a possible disaster. In the study, the exposure sub-dimension score of the disaster risk perception scale was found to be higher in students who had disaster experience than in those who did not (p = 0.032). Nursing students from the private university had higher sustainable earthquake awareness scores than those studying at the state university (p = 0.001). The mean scores of female students on the earthquake preparedness and preparation application sub-dimensions showed a significant difference compared to the scores of male students (p = 0.016). In the study, sustainable earthquake awareness total and earthquake preparedness sub-dimension scores were higher in second-year nursing students than in students of other years (p = 0.042; 0.015). Those who had received disaster training had low scores on the uncontrollable sub-dimension of the disaster risk perception scale, and high scores on the total SEAS and earthquake-structure relationship, earthquake preparedness, and earthquake preparation application sub-dimensions (p < 0.05). Conclusions: In the study, three out of four students did not find themselves prepared for disasters. Those who had disaster experience had higher disaster risk perceptions. Students who had received disaster-related training had more positive earthquake preparedness, earthquake-structure relationship, and earthquake preparation applications than those who had not. Students who were female and were in the second year had higher earthquake awareness. Studies can be carried out to inform people about the pre-disaster and preparation stages to raise awareness about disasters at universities. Education on disaster management can be integrated into courses from the first years of university.Article Citation - WoS: 1Functional Evaluation of Physical Performance, Gait, Balance and Activities of Daily Living in Older Individuals With Long Covid Syndrome(Wiley, 2024) Kosel, Izzettin; Aydin, Gamze; Tascilar Uyanik, Lacin Naz; Taşcilar Uyanik, Laçin NazObjective: The aim of our study was to evaluate the physical performance, balance, gait and activities of daily living (ADL) of older individuals with long COVID syndrome (LCS). Methods: A total of 124 individuals (49% women) with a mean age of 71.8 +/- 5.8 years were included in the study. Participants were divided into two groups, older individuals with LCS in the LCS group and older individuals who were not diagnosed with COVID-19 in the CON (control) group. Physical performance of participants was evaluated with the Alusti Test, balance and gait assessment was evaluated with the Tinetti Balance and Gait Assessment (TBGA), and ADL were evaluated with the Barthel Index (BI). Results: In the evaluations between groups, the mean score of active muscular mobility of right and left upper extremities, transfer supine position to sitting, trunk in sitting position and standing, which are among the subparameters of the Alusti Test, were statistically significantly lower in LCS compared to CON (p < .05). TBGA total score and gait section mean score of TBGA were statistically significantly lower in LCS than in CON (p < .05). There was no significant difference between the groups in the balance section of the TBGA and the mean BI scores (p > .05). Conclusions: It was concluded that physical performance parameters related to active muscular mobility of the upper extremity, transfer supine position to sitting, trunk in sitting position and walking in LCS were negatively affected by the disease, but this did not affect the level of balance and independence in ADL.Article Elastic Sac To Support Oral Feeding Performance of Preterm Infants: Crossover Randomized Controlled Study(Wiley, 2024) Genc, Canan; Goezen, Duygu; Narter, Fatma; Gözen, DuyguBackgroundSwaddling is recommended for preterm infants during feeding. Swaddling preterm infants with elastic cotton materials allows infants to easily stretch and move their extremities. This study aimed to assess the effect of bottlefeeding in a novel "elastic sac" on physiological parameters and feeding performance of preterm infants. MethodsA randomized controlled, crossover trial was conducted with total of 26 preterm infants at 26-36(+6) weeks of gestation. Infants randomly assigned to group 1 (n = 13) were bottlefed in an elastic sac (researcher-designed single-piece pouch made of soft, elastic cotton) for the first feeding and in normal clothes for the next feeding. Infants randomly assigned to group 2 (n = 13) were fed first in normal clothes and then in the elastic sac. The physiological parameters and feeding performance of the infants were assessed during each feeding. ResultsPreterm infants fed in the elastic sac had lower heart rate and higher oxygen saturation during and after feeding than infants fed in normal clothes (P < 0.05). Although all values were within clinically normal ranges, the findings suggest that feeding preterm infants in the elastic sac had a favorable effect on physiological parameters compared with feeding in normal clothes. There was no significant difference in the infants' feeding performance (P > 0.05). ConclusionA semielevated right lateral position and flexed body posture are recommended while feeding preterm infants, which can be easily maintained using the elastic sac. Feeding preterm infants in an elastic sac may support physiologic stability during oral feeding.Article Citation - WoS: 3Citation - Scopus: 3Which Factors Affect Internalized Stigmatization in Adolescents With Mental Disorders?(Wiley, 2022) Dikec, Gul; Bilac, Oznur; Kardelen, Cansin; Sapmaz, Sermin Yalin; Kandemir, HasanPurpose: The aim of this descriptive study was to determine the factors affecting internalized stigmatization of adolescents with mental disorders. Method: The study data were collected in a university hospital between August 1, 2020 and July 30, 2021 (n = 123), using a Personal information form and the Internalized Stigmatization of Mental Illness-Adolescent Form (ISMI-AF). Results: Gender and the number of hospitalizations were determined to be independent variables with explanatory power in the ISMI-AF, and in the model created with these variables, it was determined that these variables explained 18% of the change in the total points of the ISMI-AF. Conclusions: It could be recommended that psychosocial programs are developed with the aim of decreasing internalized stigmatization and increasing the psychological resilience of adolescents.Article Citation - WoS: 18Citation - Scopus: 21Exercise Improves Testicular Morphology and Oxidative Stress Parameters in Rats With Testicular Damage Induced by a High-Fat Diet(Wiley, 2022) Elmas, Merve Acikel; Ozakpinar, Ozlem Bingol; Kolgazi, Meltem; Sener, Goksel; Arbak, Serap; Ercan, FerihaObesity and male infertility are problems that affect population. Exercise is a nonpharmacological way to reduce the negative health effects of obesity. The purpose of this study was to examine the effects of exercise on hormone levels, blood-testis barrier, and inflammatory and oxidative biomarkers in rats that became obese due to a high-fat diet (HFD). Male rats received a standard diet (STD group) or a HFD (HFD group) for 18 weeks. During the final 6 weeks of the experiment, swimming exercises (1 h/5 days/week) were given to half of these animals (STD + EXC and HFD + EXC groups). Finally, blood and testicular tissues were analysed by biochemical and histological methods. Body weight, leptin, malondialdehyde, interleukin-6, TNF-alpha and myeloperoxidase levels, apoptotic cells and DNA fragmentation were increased, and testis weight, insulin, FSH, LH, testosterone, glutathione and superoxide dysmutase levels, proliferative cells, ZO-1, occludin, and gap junction protein Cx43 immunoreactivity were decreased in the HFD group. All these hormonal, morphological, oxidative and inflammatory biomarkers were enhanced in the HFD + EXC group. It is thought that exercise protected testicular cytotoxicity by regulating hormonal and oxidant/antioxidant balances and testicular function, inhibiting inflammation and apoptosis, as well as preserving blood-testis barrier.